display out lcd panel vs v out panel free sample

The view direction is the right direction marked with Φ which is with respect to the X-axis. The original location is the center point of the display panel surface, the Z axis is Normal, the X-axis is Horizontal and Y-axis is Vertical.

Normally it was defined 4 angles to correspond with 3, 12, 9, and 6 o’clock respectively. So, you can find the 6 o’clock or 12 o’clock parameter in the LCD datasheet.

Viewing Angle is the angle with respect to the Z-axis in a certain direction and marked by θ (θU means upper View Angle). LCD Viewing Angle describes the maximum watching angle, and it is one of the key indicators with the display module.

The LCD bias angle is the angle perpendicular from which the display is best viewed. (See Fig.2) This angle is determined when the display is designed and can be set at any angle or orientation. The orientation of the bias angle of LCD displays is often stated with reference to a clock face. If the offset is above the display, it is referred to as a 12:00 or Top view.

The LCD viewing angle is the angle formed on either side of the bias angle, where the contrast of the display is still considered acceptable. Generally, this contrast is specified as 2:1 for monochrome LCD and 10:1 for color LCD.

For example, assume the display is a 12:00 (topview) type. When the display is viewed from 25 degrees above the vertical, it will be at its maximum contrast and best look. If the viewer moves their eyes further above the display by an additional 30 degrees, they will see a contrast reduction, but the display will still be readable. Moving the view position any further above the display will reduce the contrast to an unacceptable degree.

Adjusting the contrast voltage, VL, effects the Bias Angle to some extent, but not the Viewing Angle. A top view 12:00 display can be optimized for a bottom view 6:00 viewing position by adjusting the contrast voltage. A 12:00 display set for a 6:00 viewing position will not have as great a contrast as a 6:00 display set for 6:00 viewing position and vice versa.

Generally, displays are optimized for straight-on viewing. Either a 6:00 or 12:00 module may be used, and the contrast voltage can be adjusted slightly to optimize the display for that viewing position. In the above example, the viewing angles of both 6:00 and 12:00 modules actually overlap the perpendicular (or straight on) viewing position.

Generally, a 10K ohm potentiometer is then connected between VDD and VSS in a single supply module, or from VDD to the negative rail in a dual supply module. The wiper of the pot is connected to the VL input of the module. (See Fig.3)

The LCD is positioned at the nominal viewing position and the pot is adjusted to obtain the desired LCD appearance. The voltage on the VL pin is now measured and a pair of resistors are chosen to produce this voltage in the production units.

By adjusting driving voltage and contrast is the most cost-effective way to improve the viewing angle. Different viewing angles need different driving voltage. It is compromising. In discussing the best viewing angle, we have to fix the voltage angle first.

– The higher the efficiency, the better of the contrast. It is especially important for negative display. Changing from 98% to 99.9% polarizer will do the work.

– Positive LCD to Negative LCD (When the LCD is used indoor or dark environment, the contrast will increase a lot, but it will not display well with ambient light only, it is also more expensive)

When a LCD is high density with the segments/icons or very crowded, some customers also complains the viewing angle or contrast are not good. The reason is for crowded display, the layout can be long and thin. The voltage drop along the layout can be big. The solutions are:

Want to find out more about LCD, OLED & TFT solutions? – Check out our knowledge base, where ypu can find tips on electronics operating temperature and differences between LCD and TFT!

2020 Update: NVIDIA and ASUS now has a long-term road map to 1000 Hz displays by the 2030s! Contacts at NVIDIA and vendors has confirmed this article is scientifically accurate.

For those new to Blur Busters, I am the co-author of a peer reviewed conference paper (along with researchers from NOKIA, NIST.gov and Keltek) on successfully photographing display motion blur which several websites have now adopted, including RTINGS, TFTCentral, SWEclockers, HDTVtest, etc.  The most prominent site of these, RTING.com, credits me (here, here, and in the Credit Screen of the below YouTube) for my invention in inexpensively photographing display motion blur.

Also, we were the world’s first consumer website to test a genuine true-480 Hz display (no fake Hz). We had to invent new motion tests to test 480 Hz.

For this optical effect, view this on LCD instead of CRT or plasma. If using motion blur reduction (e.g. ULMB, BFI, or interpolation), turn that feature off temporarily for this animation demo. Another great TestUFO animation is TestUFO Persistence-of-Vision.

Warning for flicker-sensitive people: There are other animations further down on this page that utilize flicker to demonstrate scientific principles of display motion blur behaviour.

These are two very different pixel response measurements, as seen in the GtG versus MPRT FAQ. There are many 60Hz displays with <1ms GtG (e.g. OLED) but has 16.7ms MPRT (lots of motion blur).

Persistence (in milliseconds) is also known scientifically as “MPRT” in research papers (Google Scholar search). Quoted as a number, MPRT100% and persistence often mean the same thing by modern virtual reality scientists and newer display engineers. For example, Chief Scientist at Oculus, Michael Abrash, wrote a famous blog article that use the “persistence” terminology.

This is because fast GtG doesn’t always mean fast MPRT. Back in 2013, I wrote “Why Does OLED Have Motion Blur?” when people were surprised by OLED motion blur despite OLED’s fast pixel response. This is due to the “sample-and-hold” effect, otherwise known as display persistence.

Over the years, we did many tests (beginning with 60Hz vs 120Hz vs LightBoost in 2013, and most recently, becoming the world’s first website to test 480Hz in 2017).

Motion blur on modern digital displays are reduced via strobing or black frame insertion (BFI) to lower persistence. Many LCD gaming monitors use strobe backlights (such as ULMB) that flicker at the same frequency of the refresh rate, in order to reduce motion blur.

Also, OLED screens used for virtual reality also do this type of rolling scan. This includes the Oculus Rift and HTC Vive, as well as Samsung GearVR compatible smartphones. When a GearVR smartphone is inserted into a GearVR compatible headset, they run in a special low-persistence strobed mode.

Many newer displays, especially OLED displays and modern TN gaming monitors, have the majority of their GtG pixel transitions complete in a tiny fraction of a refresh cycle. This makes GtG an insignificant percentage of MPRT. Such displays exhibit behaviour that closely follows Blur Buster’s Law.

It is guaranteed that there can’t be less motion blur than this number, no matter how good your vision is. This is the motion blur you get when GtG pixel response is instant (0ms). In the real world, motion blur can be worse than this, due to finite pixel response. This is before any additional blur is added, such as GtG limitations (additional smearing/ghosting) or display source limitations (camera blur or slow camera shutter) or human vision limitations (natural motion blurring).

It is an immutable constant (like the speed of light) where you can’t get less display motion blur than this number. Blur Busters Law assumes perfect squarewave persistence, where GtG is 0ms at both leading and trailing edge. So any display with GtG above 0 is always worse than Blur Busters Law.

This is the Blur Busters simplification of the MPRT formula found in this scientific paper. We use MPRT100% instead of MPRT90% (in the scientific paper). A120Hz ideal sample-and-hold display with 0ms GtG has identical motion blur (MPRT100%= 8.333ms) as a 1/120sec photo shutterfor the same physical panning velocity of full frame rate material.

We preferMPRT100%at Blur Bustersfor math simplicity and to match human-perceived motion blur on modern ultrafast sample-and-hold displays. Whereupon 240fps at 240Hz perceives exactly the same motion blur as a 1/240sec camera shutter photograph.And it is also easier for blogs to calculate from TestUFO motion tests.

However, software is limited in precision (erratic flicker) and can only BFI increments of full refresh cycle lengths. Hardware is required to achieve sub-refresh-cycle BFI (e.g. strobe backlights such as ULMB).

Assumptions: The exact Blur Busters Law minimum is achieved only if pixel transitions are fully square-wave (0ms GtG) on fully-sharp sources (e.g. VR, computer graphics). Actual MPRT numbers can be higher.Slow GtG pixel response will increase numbers above the Blur Busters Law guaranteed minimum motion blur. Source limitations (e.g. slow camera shutter, video blur, unfocussed camera) also adds extra motion blur above-and-beyond the display.

Assumptions: The exact Blur Busters Law minimum is achieved only at one square-wave flash per frame, during imperceptible strobe crosstalk. Frame rate matching refresh rate matching strobe rate. Any curves in the flash curve away from its peak level (e.g. CRT phosphor fade, plasma/DLP multi-pulsing, etc) will muddy the math (e.g. phosphor ghosting, rainbow blurs, etc). Very bad strobe crosstalk (GtG taking much longer that it overlaps two pulses) can also affect motion quality.

These are additional blur-like artifacts above-and-beyond the guaranteed minimum motion blur mandated by Blur Busters Law. See LCD Motion Artifacts and LCD Overdrive Artifacts for examples.

Blur Busters Law simply specifies the guaranteed minimum display motion blur you will see. It does not prevent additional motion blur (or other artifacts) above-and-beyond motion blur from persistence.

Just like a guitar string that is plucked, high-Hz strings are blurry while low-Hz strings noticeably vibrate. The same is true for display blur versus stutter — Blur Busters Law is simply a function of frequency.

For low Hz where the Hz is so low, the normally high-frequency stutter no longer blends seamlessly into display motion blur. If you stare at www.testufo.com on a common 60 Hz LCD screen, you will see higher framerates tend to show motion blur while lower framerates tend to stutter (vibrate).

Low frame rates such as 15fps (whether be 15Hz, 30Hz, 60Hz or 120Hz sample-and-hold) will noticeably stutter. Instead of “50 pixels of motion blur” it reads as “50 pixels of stutter amplitude” (the vibrate-back-and-fourth span).

However, once the stutter is high-frequency (e.g. 60fps or 120fps) the 60 or 120 stutters per second vibrates so fast, it just blends into motion blur. The “stutters-blends-to-motion-blur” effect is more easily understood in this variable refresh rate simulation, if viewed on a common LCD (non-strobed):

This is a TestUFO Animation that simulates variable refresh rate (G-SYNC, FreeSync, HDMI 2.1 Game VRR, or VESA Adaptive-Sync) via interpolation. Assuming you’re using a modern GPU-accelerated web browser (e.g. chrome://gpu fully green) the above browser animation above will show that low-framerate stutter blending seamlessly into motion blur as the frame rate (refresh rate) smoothly ramps up and down.

A huge purpose of variable refresh rate gaming displays (G-SYNC and FreeSync gaming displays) is to eliminate stutters induced from frame rate fluctuations. However, it cannot fully eliminate stutter of ultra-low frame rates (e.g. 15fps or 30fps). Whatever leftover stutter remains, exactly follows Blur Busters Law except that the calculated minimum motion blur (in pixels) is instead the stutter amplitude (in pixels).

The threshold blending between stutter and blur will vary from human to human based on their individual flicker fusion threshold on the stutter vibration. Blur Busters Law for high frame rates (240fps) will tend to be motion blur due to ultra-fast 240Hz “stutter” blending into motion blur. While Blur Busters Law on low frame rates (15fps) will tend to be stutter amplitude instead of motion blur.

Another great animation demonstrating the continuum between stutter and motion blur, can be demonstrated in TestUFO Eye Tracking Variable Speed Animation.

In the old days, playing 30 fps games on a 60 Hz CRT created a double image effect. This is still a problem today when playing on strobed displays running any frame rates below strobe rate.

There are always 2 duplicate images during [email protected] strobed, and [email protected] strobed. This is still visible even at [email protected] strobed.

In addition, multi-image artifacts are also made visible via backlights utilizing PWM-dimming, such as doing 360 Hz PWM at 60 Hz. This produces the same effect.

Even 1000 Hz PWM still unfortunately produces visible artifacts. We cannot see high-frequency flicker directly, but PWM side effects (stroboscopic effect) up to 10,000Hz are still visible (research paper):

Unfortunately, there are many situations where we don’t want motion blur forced upon us by the display above-and-beyond natural human vision blurring. This includes virtual reality headsets. Oculus and other manufacturers found that low-persistence reduces nausea in virtual reality. They cannot add additional motion blur without increasing nausea. So stroboscopic effects are currently the lesser of evil for most people.

At lower refresh rates such as 60 Hz or 75 Hz, amplified flicker can occur because of the flicker curve and flicker duty cycle. On CRTs and plasmas, phosphor gives a gentler fade than square-wave strobe backlight flashes. In addition, global flash strobing (e.g. ULMB) also varies average picture brightness more than a scanning flash (e.g. CRT).

This is why the equivalent refresh rate (e.g. 75 Hz) flickers a lot more on strobed LCD displays than on CRT/plasma displays, because you’re comparing square-waved strobing (e.g. ULMB) versus curved strobing (e.g. CRT).

Today, we sit closer to screens that are bigger and brighter than yesterday’s CRT tubes. This amplifies visibility of flicker. Due to this, most blur-reduction modes (ULMB) run only at higher refresh rates such as 120 Hz instead of 60 Hz to avoid bad flicker.

We simply use use overkill BFI/strobe rate to compensate for the lack of flicker curve-softening (phosphor fade). Thankfully, 120 Hz square wave strobing (ULMB or LightBoost) still flickers a lot less than an old 50 Hz or 60 Hz CRT.

Real life has no frame rate. Frame rates and refresh rate are an artificial digital image-stepping invention of humankind (since the first zoetropes and first movie projectors) that can never perfectly match analog-motion reality.

However, ultra-high frame rates at ultra-high refresh rates (>1000fps at >1000Hz) manages to come very close. This is currently the best way to achieve blurless sample-and-hold with no flicker, no motion blur, and no stroboscopic effects.

Also, real life has no flicker, no strobing and no BFI. Today’s strobe backlight technologies (e.g. ULMB) are a good interim workaround for display motion blur. However, the ultimate displays of the distant future will fully eliminate motion blur without strobing. The only way to do that is ultra-high frame rates & refresh rates.

The limiting factor is human-eye tracking speed on full-FOV retina-resolution displays. As a result, with massive screen 4K TVs, 8K TVs, and virtual reality headsets, higher refresh rates are needed to compensate for degradation of motion resolution via persistence.

the sweet spot for 1080p at 90 degrees FOV is probably somewhere between 300 and 1000 Hz, although higher frame rates would be required to hit the sweet spot at higher resolutions.

Higher frame rates are definitely better for visual quality. They also are power hungry, so it will take a while to solve that for standalone HMDs. I think 240 Hz/eye is a good short term target and agree with 1kHz+ for the long run.

The Blur Busters Law (1ms of persistence = 1 pixel of motion blurring per 1000 pixels/sec) becomes a vicious cycle when it comes to increasing resolutions and increasing FOV. Persistence limitations and stroboscopic artifacts are more easily noticed with the following:

Higher resolution displays:The same physical motion speed travels more pixels per second. This creates more pixels of motion blur for the same persistence (MPRT).

Wider field of vision (FOV) displays:The same angular display motion speed (eye tracking speed) stays onscreen longer. This extra time makes display motion blur more easily seen.

In the most extreme future case (theoretical 180+ degree retina-resolution virtual reality headsets), display refresh rates far beyond 1000 Hz may someday be required (e.g. 10,000 Hz display refresh rate, defined by the 10,000 Hz stroboscopic-artifacts detection threshold), and also explained in The Stroboscopic Effect of Finite Frame Rates. This is in order to pass a theoretical extreme-motion “Holodeck Turing Test” (becoming unable to tell apart real life from virtual reality) for the vast majority of the human population.

However, for general CRT-quality sports television watching, 1000fps at 1000Hz would sufficiently approximately match 1ms CRT phosphor persistence, for a flicker-free sample-and-hold display. Technologically, this is achievable through interpolation or other frame rate amplification technologies on an ultra-high refresh rate display.

The Vicious Cycle Effect also applies to stutters that are no longer hidden by other defects such as display motion blur. For example a 1ms stutter is an 8 pixel stutter-jump at 8000 pixels/second, which is a slow one screenwidth per second on an 8K display. Smaller stutters becoming human-visible again with extreme display and graphics quality improvements.

This will eventually be necessary for virtual reality, but also useful for huge wall-sized retina displays needing blur-free motion. It will take time, but fortunately, it is closer this century than many think. Experimental 1000 Hz displays now exist.  For example, ViewPixx has a 1440 Hz DLP projector for display research, and there are several other vendors.

It will be challenging for graphics processors to generate the ultra high frame rates necessary for future 1000+ Hz gaming displays of the 2020s and 2030s.

Solutions are being accelerated out of necessity by virtual reality research. For example, Oculus’ asynchronous time-warping and spacewarp technologies converts 45 frames per second to 90 frames per second at low GPU processing cost via clever 3D interpolation tricks.

Dr. Morgan McGuire (NVIDIA scientist who agreed on 1000+Hz) wrote an article for RoadToVR about foveated rendering algorithms as well as real-time ray-tracing or beam-tracing with real time de-noising. This can be another potential alternative to ultra-high frame rates.

In addition, future lagless 3D interpolation technologies with geometry-awareness and parallax-reveal capabilities, may potentially convert 100fps to 1000fps with no visible artifacts for 1000Hz.

Another theoretical route to successful high-detail 1000fps+ could be a co-GPU embedded in the display (Imagine a G-SYNC 4 or FreeSync 4 with strobeless ULMB!), working in conjunction with a main computer’s GPU, in order to get around display cable bandwidth limitations. The future of “Frame Rate Amplification Technologies” (FRAT) is full of exciting research!

This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.

Shopping for a new TV is like wading through a never-ending pool of tech jargon, display terminology, and head-spinning acronyms. It was one thing when 4K resolution landed in the homes of consumers, with TV brands touting the new UHD viewing spec as a major marketing grab. But over the last several years, the plot has only continued to thicken when it comes to three- and four-letter acronyms with the introduction of state-of-the-art lighting and screen technology. But between OLEDs, QLEDs, mini-LEDs, and now QD-OLEDs, there’s one battle of words that rests at the core of TV vocabulary: LED versus LCD.

Despite having a different acronym, LED TV is just a specific type of LCD TV, which uses a liquid crystal display (LCD) panel to control where light is displayed on your screen. These panels are typically composed of two sheets of polarizing material with a liquid crystal solution between them. When an electric current passes through the liquid, it causes the crystals to align, so that light can (or can’t) pass through. Think of it as a shutter, either allowing light to pass through or blocking it out.

Since both LED and LCD TVs are based around LCD technology, the question remains: what is the difference? Actually, it’s about what the difference was. Older LCD TVs used cold cathode fluorescent lamps (CCFLs) to provide lighting, whereas LED LCD TVs used an array of smaller, more efficient light-emitting diodes (LEDs) to illuminate the screen.

Since the technology is better, all LCD TVs now use LED lights and are colloquially considered LED TVs. For those interested, we’ll go deeper into backlighting below, or you can move onto the Local Dimming section.

Three basic illumination forms have been used in LCD TVs: CCFL backlighting, full-array LED backlighting, and LED edge lighting. Each of these illumination technologies is different from one another in important ways. Let’s dig into each.

CCFL backlighting is an older, now-abandoned form of display technology in which a series of cold cathode lamps sit across the inside of the TV behind the LCD. The lights illuminate the crystals fairly evenly, which means all regions of the picture will have similar brightness levels. This affects some aspects of picture quality, which we discuss in more detail below. Since CCFLs are larger than LED arrays, CCFL-based LCD TVs are thicker than LED-backlit LCD TVs.

Full-array backlighting swaps the outdated CCFLs for an array of LEDs spanning the back of the screen, comprising zones of LEDs that can be lit or dimmed in a process called local dimming. TVs using full-array LED backlighting to make up a healthy chunk of the high-end LED TV market, and with good reason — with more precise and even illumination, they can create better picture quality than CCFL LCD TVs were ever able to achieve, with better energy efficiency to boot.

Another form of LCD screen illumination is LED edge lighting. As the name implies, edge-lit TVs have LEDs along the edges of a screen. There are a few different configurations, including LEDs along just the bottom, LEDs on the top and bottom, LEDs left and right, and LEDs along all four edges. These different configurations result in picture quality differences, but the overall brightness capabilities still exceed what CCFL LCD TVs could achieve. While there are some drawbacks to edge lighting compared to full-array or direct backlight displays, the upshot is edge lighting that allows manufacturers to make thinner TVs that cost less to manufacture.

To better close the local-dimming quality gap between edge-lit TVs and full-array back-lit TVs, manufacturers like Sony and Samsung developed their own advanced edge lighting forms. Sony’s technology is known as “Slim Backlight Master Drive,” while Samsung has “Infinite Array” employed in its line of QLED TVs. These keep the slim form factor achievable through edge-lit design and local dimming quality more on par with full-array backlighting.

Local dimming is a feature of LED LCD TVs wherein the LED light source behind the LCD is dimmed and illuminated to match what the picture demands. LCDs can’t completely prevent light from passing through, even during dark scenes, so dimming the light source itself aids in creating deeper blacks and more impressive contrast in the picture. This is accomplished by selectively dimming the LEDs when that particular part of the picture — or region — is intended to be dark.

Local dimming helps LED/LCD TVs more closely match the quality of modern OLED displays, which feature better contrast levels by their nature — something CCFL LCD TVs couldn’t do. The quality of local dimming varies depending on which type of backlighting your LCD uses, how many individual zones of backlighting are employed, and the quality of the processing. Here’s an overview of how effective local dimming is on each type of LCD TV.

TVs with full-array backlighting have the most accurate local dimming and therefore tend to offer the best contrast. Since an array of LEDs spans the entire back of the LCD screen, regions can generally be dimmed with more finesse than on edge-lit TVs, and brightness tends to be uniform across the entire screen. Hisense’s impressive U7G TVs are great examples of relatively affordable models that use multiple-zone, full-array backlighting with local dimming.

“Direct local dimming” is essentially the same thing as full-array dimming, just with fewer LEDs spread further apart in the array. However, it’s worth noting that many manufacturers do not differentiate “direct local dimming” from full-array dimming as two separate forms of local dimming. We still feel it’s important to note the difference, as fewer, further-spaced LEDs will not have the same accuracy and consistency as full-array displays.

Because edge lighting employs LEDs positioned on the edge or edges of the screen to project light across the back of the LCD screen, as opposed to coming from directly behind it, it can result in very subtle blocks or bands of lighter pixels within or around areas that should be dark. The local dimming of edge-lit TVs can sometimes result in some murkiness in dark areas compared with full-array LED TVs. It should also be noted that not all LED edge-lit TVs offer local dimming, which is why it is not uncommon to see glowing strips of light at the edges of a TV and less brightness toward the center of the screen.

Since CCFL backlit TVs do not use LEDs, models with this lighting style do not have dimming abilities. Instead, the LCD panel of CCFL LCDs is constantly and evenly illuminated, making a noticeable difference in picture quality compared to LED LCDs. This is especially noticeable in scenes with high contrast, as the dark portions of the picture may appear too bright or washed out. When watching in a well-lit room, it’s easier to ignore or miss the difference, but in a dark room, it will be, well, glaring.

As if it wasn’t already confusing enough, once you begin exploring the world of modern display technology, new acronyms crop up. The two you’ll most commonly find are OLED and QLED.

An OLED display uses a panel of pixel-sized organic compounds that respond to electricity. Since each tiny pixel (millions of which are present in modern displays) can be turned on or off individually, OLED displays are called “emissive” displays (meaning they require no backlight). They offer incredibly deep contrast ratios and better per-pixel accuracy than any other display type on the market.

Because they don’t require a separate light source, OLED displays are also amazingly thin — often just a few millimeters. OLED panels are often found on high-end TVs in place of LED/LCD technology, but that doesn’t mean that LED/LCDs aren’t without their own premium technology.

QLED is a premium tier of LED/LCD TVs from Samsung. Unlike OLED displays, QLED is not a so-called emissive display technology (lights still illuminate QLED pixels from behind). However, QLED TVs feature an updated illumination technology over regular LED LCDs in the form of Quantum Dot material (hence the “Q” in QLED), which raises overall efficiency and brightness. This translates to better, brighter grayscale and color and enhances HDR (High Dynamic Range) abilities.

And now to make things extra confusing, part of Samsung’s 2022 TV lineup is being billed as traditional OLEDs, although a deeper dive will reveal this is actually the company’s first foray into a new panel technology altogether called QD-OLED.

For a further description of QLED and its features, read our list of the best TVs you can buy. The article further compares the qualities of both QLED and OLED TV; however, we also recommend checking outfor a side-by-side look at these two top-notch technologies.

There are more even displays to become familiar with, too, including microLED and Mini-LED, which are lining up to be the latest head-to-head TV technologies. Consider checking out how the two features compare to current tech leaders in

In the world of TV technology, there’s never a dull moment. However, with this detailed research, we hope you feel empowered to make an informed shopping decision and keep your Best Buy salesperson on his or her toes.

This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.

LCD panels are backlit by LED lights, so they rely on a backlight behind the panel to make the picture visible, and the LCD layer can"t prevent all light from escaping out of the screen. This means that even in a black scene, the backlight is still on, and some light escapes, causing blacks to appear gray.

In an attempt to mask this shortcoming, some LED TVs employ local dimming to target dark portions of the screen and dim the backlight in those areas. The intended result is that dark portions become darker, but everything else is left as bright as it should be, increasing the contrast between dark and light objects.

OLEDs use self-emitting pixels and don"t have a backlight, and because of this, they don"t have local dimming features. However, we score OLEDs as a perfect 10 for local dimming, because they do everything that a local dimming feature on an LED TV should do. Dark areas are completely off, leaving bright areas to stand out without any blooming.

Some TVs offer different local dimming settings. Low settings will usually dim the backlight less, but then the local dimming will also be less effective at improving the contrast. Higher settings will dim more, but may also make blooming, or other related issues, more visible. Local dimming preferences are subjective, so if you have multiple options, try out the different settings and choose the one you like best. Apart from that, there"s no way to get better results from local dimming. If this is a feature that matters to you, be sure to get a TV that scores highly in this test.

Contrast/Brightness: These settings aim to improve the contrast ratio by tinkering with the white and black levels. It doesn"t have a direct effect on the local dimming but can improve the picture quality. The contrast setting increases the luminosity of the brightest whites, while brightness (sometimes called black level), makes blacks darker. Keep in mind the brightness setting on some TVs controls the backlight, which doesn"t affect picture quality.

Samsung"s UHD Dimming: This processes the video in an attempt to mimic local dimming. It doesn’t dim the backlight but instead changes the contrast of different areas of the picture. Video purists usually dislike it, because it messes with the video settings of the TV, changing contrast from frame to frame. We don’t recommend using it.

Frame dimming: Frame dimming, or CE dimming on Samsung TVs, is a basic version of local dimming, but it dims the entire backlight instead of zones. Usually found on edge-lit TVs, it causes small highlights to become dim as well. It may improve the contrast a bit, but it"s not very useful for most scenes.

Local dimming features on LED TVs are a way to improve the contrast ratio. Since these TVs consist of LED backlights behind an LCD panel, local dimming aims to turn off, or dim, certain zones of the LED backlight, making blacks look darker and highlights brighter. However, there may be some issues with local dimming on some TVs as it could cause blooming around bright objects or for entire zones to light up when there"s a small object. Overall, most local dimming features on modern TV do an effective job at improving the picture quality in dark scenes, and only some lower-end models will have glaring problems.

OLED is the display technology that has everyone talking. Considering the inky shadows, vivid highlights, and lifelike colors that these panels can produce, it’s no wonder. For 2022, we’re offering this coveted display tech across a wide range of our ProArt Studiobook, Zenbook, and Vivobook families of laptops. From our affordable everyday laptops to our premium, luxury machines, you’ll find an OLED-equipped laptop that fits your needs and budget. So what sets these displays apart from the competition? Here, we’ll break down the LCD vs. OLED debate so that you can pick the best laptop for your needs.

If you bought a high-end smartphone in recent years, you likely already have an example of this premium panel tech ready to hand. Ever wonder why photos and videos seem to look better on your phone than your old laptop? That could be because OLED displays excel at producing lifelike images with vibrant colors and striking contrast.

Both LCD and OLED displays create the image on your screen using millions of individual pixels. However, on standard LCDs, those pixels are illuminated by an always-on backlight, usually an array of large LEDs, that light up the entire screen at once. It’s an efficient arrangement, but it hinders a display’s ability to produce inky shadows, since the black pixels still have some light behind them. On an OLED display, however, there is no backlight—instead, each pixel acts as its own light source, and can be turned on or off independently of the others. This means that black portions of an image can be truly black, because there’s no light source shining through behind them.

OLED panels also excel at displaying vibrant, lifelike colors. Typically, they offer wide color gamut coverage comparable with the color production of expensive studio-grade monitors. Between the intense colors, inky shadows, and striking highlights, OLED panels deliver an image that leaps off the screen. For media of all kinds, you’ll see the difference right away.

For folks who often use their laptops in well-lit rooms full of natural light, a display with a high peak brightness is crucial. Our Vivobook Pro 16X OLED, for example, offers a 550-nit peak brightness so that you can comfortably use the laptop wherever, whenever.

But a display’s low-light performance matters, too. You probably turn down the brightness when you’re in a dimly lit bedroom to conserve battery life—and so it doesn’t sear your eyes when you open a website with a white background. Unfortunately for LCD displays, their contrast and color production often suffer at low brightness levels, leading to a washed-out image where it’s hard to distinguish one color from another. An LCD might only cover 11% of the DCI-P3 color gamut at its lowest brightness setting. To make matters worse, many LCDs introduce distracting, annoying flicker at low brightness levels due to their use of pulse-width modulation (PWM) techniques.

OLED panels, on the other hand, shine in this scenario. Much more than LCDs, they can deliver the vibrant colors and striking contrast that makes your content immersive and text easy to read. ASUS OLED panels maintain 100% DCI-P3 color gamut coverage at both high and low brightness levels, giving you accurate, lifelike colors across the board. Our OLED panels are certified for flicker-free performance by TÜV Rheinland, too. For comfortable use in a wide range of scenarios, OLED panels are the way to go.

When many of us think about using our laptop, we imagine ourselves sitting directly in front of the screen. While this is how folks commonly use a laptop, it’s not the entire story. You’ve probably watched a movie on your laptop with a loved one, collaborated with a classmate on a project, or followed an online recipe as you cooked dinner. Look at an LCD display from a sharp angle, as you likely had to do in any of these instances, and you’ll often see an ugly, color-shifted image.

This is another circumstance where OLED panels stand out from the other options. While some types of LEDs, notably IPS panels, offer wide viewing angles, OLED displays tend to offer wider viewing angles than even the best LEDs. With an OLED-equipped laptop, you’ll always have a clear view of the screen, even in those regular moments when you’re not looking at it straight-on.

An LCD display has a single, always-on backlight that emits broad-spectrum white light similar to what you see during the daytime. That’s fine during typical working hours, but prolonged exposure to blue wavelengths in the evening hours can disrupt your circadian rhythm and make it harder for you to fall asleep.* That’s why we offer a range of Eye Care monitors that give you tools for reducing your exposure to blue light.

Another option is an OLED display. Since each pixel in an OLED panel is its own light source, these displays automatically emit less blue light than LCD options under almost all conditions—about 70% less, compared with standard LCD displays.** You’ll be much more able to browse your TikTok feed or catch a show before bedtime without throwing off your sleep schedule. And your eyes will get fatigued more slowly when you use your PC, making you better able to finish a creative project while you’re still feeling the inspiration.

Netflix, Amazon Prime Video, and Disney Plus all let you stream movies and shows in High Dynamic Range, or HDR. An increasing number of games let you play in HDR, too. No matter what kind of content you enjoy, odds are you’ll want your next laptop to enjoy the inky shadows, dazzling highlights, and wide color gamut coverage of the next generation of media.

There are LCD displays that deliver a credible HDR experience, but OLED displays are a more natural fit for the content. The infinite contrast of an OLED display lets you have a brightly shining pixel right next to a perfectly black one, perfect for displaying high-contrast scenes. Bright stars in the infinite blackness of space, fireworks bursting across a night sky, and the sun setting behind a natural landscape never looked so good as they do on an OLED display. Look for laptops with Dolby Vision support and a VESA DisplayHDR 400 True Black or DisplayHDR 500 True Black certification to ensure the best experience.

That said, you certainly can get an LCD display that’s primed and ready for HDR. Our ROG Zephyrus Duo 16 includes a display option with a full-array local-dimming (FALD) backlight comprising 512 Mini LEDs that approximate the contrast ratio that an OLED panel can achieve. On top of that, it offers an 1100-nit peak brightness and a VESA DisplayHDR 1000 certification. That increased high-end luminance means that you can see more detail in bright images than you would on an HDR display with lower peak brightness.

When you’re watching an action movie, cheering on your favorite athletes during March Madness, playing a round of Fortnite with your friends, or simply tracking the movement of your mouse cursor across the screen as you get some work done, the clarity of moving objects on your display matters. The key spec here is response time. Each pixel on any display takes a small but noticeable amount of time to transition from one color to the next. On a display with poor response time, this appears as a distracting blur that resolves and goes away when the image stops moving. Our OLED panels offer an exceptional 0.2ms response time that gives you absolute clarity in moving images. Comparable LCD displays can take up to 10ms to switch colors.

It’s not just the sharpness of any given image that’s improved by low response time. The accuracy of any given pixel is affected, as well. A typical 60Hz panel refreshes the content on the screen every 16.67 milliseconds. If a pixel takes 10ms to transition to the correct color, then it only actually spends 6.67ms displaying the correct color. A pixel that only needs 0.2ms to transition to the correct color displays that color for almost the entirety of the refresh cycle. Whether you’re watching an action-packed movie, cheering on your favorite sports team, or digging into a great nature documentary, you’ll see a clear image throughout instead of blurry motion.

However, not all LCD displays are built the same. Purchase a gaming laptop equipped with one of our ROG Nebula Displays, and you’ll enjoy a speedy 3ms response time. What’s more, LCD panels are capable of reaching refresh rates that OLED can’t currently match. Our ROG Strix SCAR laptops, for example, can be equipped with a lightning-quick 360Hz display. If you’re shopping for a laptop primarily for fast-paced competitive gaming, a high-refresh-rate LCD display is likely a better fit for you. Click here to read about our different families of gaming laptops.

As you read articles about OLED displays and watch reviews on YouTube, you might notice people talking about “burn-in.” More accurately known as image retention, this is a type of image distortion that can occur when users display static images or on-screen elements at peak brightness levels uninterrupted for many hours, if not days, at a time. Most folks simply don’t use their monitors in this way, so in real-world usage, you can purchase a laptop with an OLED display with the confidence that you’re unlikely to encounter image retention issues. For additional peace of mind, check out the results of a long-term uniformity test conducted by a trusted independent media outlet.

To provide an additional layer of protection against image retention, we include a suite of ASUS OLED Care settings in the easy-to-use MyASUS app. Pixel refresh launches a special screen saver when your display has been idle for 30 minutes that refreshes your screen pixels and optimizes picture quality. Pixel shift moves display pixels almost invisibly to help make sure that static images aren’t constantly displayed on your desktop. And we make it easy to adjust your Windows taskbar settings so that this static display element doesn’t cause any long-term image retention issues.

Some best practices can give you even more assurance that your OLED display will deliver a pristine image over the expected lifetime of the device—and they’re things that you’d likely already do with your laptop anyway. It’s prudent to have the display turn off due to inactivity after a certain amount of time. Rather than leave the brightness level at maximum constantly, it’s a good idea to dial back the display brightness to best fit the surrounding ambient light. Both of these prudent measures help extend battery life, as well, so you likely do these things with your laptops anyway. Finally, our OLED-equipped laptops ship with Dark Mode enabled in Windows by default so that static UI elements aren’t unnecessarily bright.

For most users, an OLED panel is a better fit than an LCD panel. The infinite contrast these displays provide make them more comfortable to use in a wide range of applications. Whether you’re connecting with friends on social media, skimming through your email, watching the latest show, or just browsing your favorite sites, an OLED panel will elevate your experience. Ultra-wide viewing angles let you share any of these things with family, friends, coworkers, and clients. And the list goes on—this display option sets you up for immersive HDR media, takes care of your eyes with its reduced blue light emission, and gives you exceptional clarity in moving images.

There are folks out there for whom LCD panels are a superior choice. Gamers, in particular, benefit from the sky-high refresh rates and ever-lowering response times afforded by LCDs. And those who want an HDR experience augmented by the absolute highest peak brightness levels may prefer an LCD equipped with an ultra-bright FALD backlight.

For just about everyone else, the advantages of OLED panels make them the clear winner of the LCD vs. OLED debate. For too long, display aficionados had to hunt for devices equipped with this class-leading tech. Now, we’re offering OLED panels across a wide range of laptops.

Looking for a highly portable laptop with a detachable keyboard? Check out the eminently affordable Vivobook 13 Slate OLED. Need a blend of performance, portability, and elegance? The Zenbook Flip 14 OLED gives you muscular performance with its AMD Ryzen 5000-series CPU. For creators, we have a wide range of laptops equipped with OLED panels. Click here to learn more. For every budget, need, and preference, we have an OLED laptop ready and waiting. Find your next laptop today.

Glass substrate with ITO electrodes. The shapes of these electrodes will determine the shapes that will appear when the LCD is switched ON. Vertical ridges etched on the surface are smooth.

A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directlybacklight or reflector to produce images in color or monochrome.seven-segment displays, as in a digital clock, are all good examples of devices with these displays. They use the same basic technology, except that arbitrary images are made from a matrix of small pixels, while other displays have larger elements. LCDs can either be normally on (positive) or off (negative), depending on the polarizer arrangement. For example, a character positive LCD with a backlight will have black lettering on a background that is the color of the backlight, and a character negative LCD will have a black background with the letters being of the same color as the backlight. Optical filters are added to white on blue LCDs to give them their characteristic appearance.

LCDs are used in a wide range of applications, including LCD televisions, computer monitors, instrument panels, aircraft cockpit displays, and indoor and outdoor signage. Small LCD screens are common in LCD projectors and portable consumer devices such as digital cameras, watches, digital clocks, calculators, and mobile telephones, including smartphones. LCD screens are also used on consumer electronics products such as DVD players, video game devices and clocks. LCD screens have replaced heavy, bulky cathode-ray tube (CRT) displays in nearly all applications. LCD screens are available in a wider range of screen sizes than CRT and plasma displays, with LCD screens available in sizes ranging from tiny digital watches to very large television receivers. LCDs are slowly being replaced by OLEDs, which can be easily made into different shapes, and have a lower response time, wider color gamut, virtually infinite color contrast and viewing angles, lower weight for a given display size and a slimmer profile (because OLEDs use a single glass or plastic panel whereas LCDs use two glass panels; the thickness of the panels increases with size but the increase is more noticeable on LCDs) and potentially lower power consumption (as the display is only "on" where needed and there is no backlight). OLEDs, however, are more expensive for a given display size due to the very expensive electroluminescent materials or phosphors that they use. Also due to the use of phosphors, OLEDs suffer from screen burn-in and there is currently no way to recycle OLED displays, whereas LCD panels can be recycled, although the technology required to recycle LCDs is not yet widespread. Attempts to maintain the competitiveness of LCDs are quantum dot displays, marketed as SUHD, QLED or Triluminos, which are displays with blue LED backlighting and a Quantum-dot enhancement film (QDEF) that converts part of the blue light into red and green, offering similar performance to an OLED display at a lower price, but the quantum dot layer that gives these displays their characteristics can not yet be recycled.

Since LCD screens do not use phosphors, they rarely suffer image burn-in when a static image is displayed on a screen for a long time, e.g., the table frame for an airline flight schedule on an indoor sign. LCDs are, however, susceptible to image persistence.battery-powered electronic equipment more efficiently than a CRT can be. By 2008, annual sales of televisions with LCD screens exceeded sales of CRT units worldwide, and the CRT became obsolete for most purposes.

Each pixel of an LCD typically consists of a layer of molecules aligned between two transparent electrodes, often made of Indium-Tin oxide (ITO) and two polarizing filters (parallel and perpendicular polarizers), the axes of transmission of which are (in most of the cases) perpendicular to each other. Without the liquid crystal between the polarizing filters, light passing through the first filter would be blocked by the second (crossed) polarizer. Before an electric field is applied, the orientation of the liquid-crystal molecules is determined by the alignment at the surfaces of electrodes. In a twisted nematic (TN) device, the surface alignment directions at the two electrodes are perpendicular to each other, and so the molecules arrange themselves in a helical structure, or twist. This induces the rotation of the polarization of the incident light, and the device appears gray. If the applied voltage is large enough, the liquid crystal molecules in the center of the layer are almost completely untwisted and the polarization of the incident light is not rotated as it passes through the liquid crystal layer. This light will then be mainly polarized perpendicular to the second filter, and thus be blocked and the pixel will appear black. By controlling the voltage applied across the liquid crystal layer in each pixel, light can be allowed to pass through in varying amounts thus constituting different levels of gray.

The chemical formula of the liquid crystals used in LCDs may vary. Formulas may be patented.Sharp Corporation. The patent that covered that specific mixture expired.

Most color LCD systems use the same technique, with color filters used to generate red, green, and blue subpixels. The LCD color filters are made with a photolithography process on large glass sheets that are later glued with other glass sheets containing a TFT array, spacers and liquid crystal, creating several color LCDs that are then cut from one another and laminated with polarizer sheets. Red, green, blue and black photoresists (resists) are used. All resists contain a finely ground powdered pigment, with particles being just 40 nanometers across. The black resist is the first to be applied; this will create a black grid (known in the industry as a black matrix) that will separate red, green and blue subpixels from one another, increasing contrast ratios and preventing light from leaking from one subpixel onto other surrounding subpixels.Super-twisted nematic LCD, where the variable twist between tighter-spaced plates causes a varying double refraction birefringence, thus changing the hue.

LCD in a Texas Instruments calculator with top polarizer removed from device and placed on top, such that the top and bottom polarizers are perpendicular. As a result, the colors are inverted.

The optical effect of a TN device in the voltage-on state is far less dependent on variations in the device thickness than that in the voltage-off state. Because of this, TN displays with low information content and no backlighting are usually operated between crossed polarizers such that they appear bright with no voltage (the eye is much more sensitive to variations in the dark state than the bright state). As most of 2010-era LCDs are used in television sets, monitors and smartphones, they have high-resolution matrix arrays of pixels to display arbitrary images using backlighting with a dark background. When no image is displayed, different arrangements are used. For this purpose, TN LCDs are operated between parallel polarizers, whereas IPS LCDs feature crossed polarizers. In many applications IPS LCDs have replaced TN LCDs, particularly in smartphones. Both the liquid crystal material and the alignment layer material contain ionic compounds. If an electric field of one particular polarity is applied for a long period of time, this ionic material is attracted to the surfaces and degrades the device performance. This is avoided either by applying an alternating current or by reversing the polarity of the electric field as the device is addressed (the response of the liquid crystal layer is identical, regardless of the polarity of the applied field).

Displays for a small number of individual digits or fixed symbols (as in digital watches and pocket calculators) can be implemented with independent electrodes for each segment.alphanumeric or variable graphics displays are usually implemented with pixels arranged as a matrix consisting of electrically connected rows on one side of the LC layer and columns on the other side, which makes it possible to address each pixel at the intersections. The general method of matrix addressing consists of sequentially addressing one side of the matrix, for example by selecting the rows one-by-one and applying the picture information on the other side at the columns row-by-row. For details on the various matrix addressing schemes see passive-matrix and active-matrix addressed LCDs.

LCDs, along with OLED displays, are manufactured in cleanrooms borrowing techniques from semiconductor manufacturing and using large sheets of glass whose size has increased over time. Several displays are manufactured at the same time, and then cut from the sheet of glass, also known as the mother glass or LCD glass substrate. The increase in size allows more displays or larger displays to be made, just like with increasing wafer sizes in semiconductor manufacturing. The glass sizes are as follows:

Until Gen 8, manufacturers would not agree on a single mother glass size and as a result, different manufacturers would use slightly different glass sizes for the same generation. Some manufacturers have adopted Gen 8.6 mother glass sheets which are only slightly larger than Gen 8.5, allowing for more 50 and 58 inch LCDs to be made per mother glass, specially 58 inch LCDs, in which case 6 can be produced on a Gen 8.6 mother glass vs only 3 on a Gen 8.5 mother glass, significantly reducing waste.AGC Inc., Corning Inc., and Nippon Electric Glass.

The origins and the complex history of liquid-crystal displays from the perspective of an insider during the early days were described by Joseph A. Castellano in Liquid Gold: The Story of Liquid Crystal Displays and the Creation of an Industry.IEEE History Center.Peter J. Wild, can be found at the Engineering and Technology History Wiki.

In 1888,Friedrich Reinitzer (1858–1927) discovered the liquid crystalline nature of cholesterol extracted from carrots (that is, two melting points and generation of colors) and published his findings at a meeting of the Vienna Chemical Society on May 3, 1888 (F. Reinitzer: Beiträge zur Kenntniss des Cholesterins, Monatshefte für Chemie (Wien) 9, 421–441 (1888)).Otto Lehmann published his work "Flüssige Kristalle" (Liquid Crystals). In 1911, Charles Mauguin first experimented with liquid crystals confined between plates in thin layers.

In 1922, Georges Friedel described the structure and properties of liquid crystals and classified them in three types (nematics, smectics and cholesterics). In 1927, Vsevolod Frederiks devised the electrically switched light valve, called the Fréedericksz transition, the essential effect of all LCD technology. In 1936, the Marconi Wireless Telegraph company patented the first practical application of the technology, "The Liquid Crystal Light Valve". In 1962, the first major English language publication Molecular Structure and Properties of Liquid Crystals was published by Dr. George W. Gray.RCA found that liquid crystals had some interesting electro-optic characteristics and he realized an electro-optical effect by generating stripe-patterns in a thin layer of liquid crystal material by the application of a voltage. This effect is based on an electro-hydrodynamic instability forming what are now called "Williams domains" inside the liquid crystal.

The MOSFET (metal-oxide-semiconductor field-effect transistor) was invented by Mohamed M. Atalla and Dawon Kahng at Bell Labs in 1959, and presented in 1960.Paul K. Weimer at RCA developed the thin-film transistor (TFT) in 1962.

In 1964, George H. Heilmeier, then working at the RCA laboratories on the effect discovered by Williams achieved the switching of colors by field-induced realignment of dichroic dyes in a homeotropically oriented liquid crystal. Practical problems with this new electro-optical effect made Heilmeier continue to work on scattering effects in liquid crystals and finally the achievement of the first operational liquid-crystal display based on what he called the George H. Heilmeier was inducted in the National Inventors Hall of FameIEEE Milestone.

In the late 1960s, pioneering work on liquid crystals was undertaken by the UK"s Royal Radar Establishment at Malvern, England. The team at RRE supported ongoing work by George William Gray and his team at the University of Hull who ultimately discovered the cyanobiphenyl liquid crystals, which had correct stability and temperature properties for application in LCDs.

The idea of a TFT-based liquid-crystal display (LCD) was conceived by Bernard Lechner of RCA Laboratories in 1968.dynamic scattering mode (DSM) LCD that used standard discrete MOSFETs.

On December 4, 1970, the twisted nematic field effect (TN) in liquid crystals was filed for patent by Hoffmann-LaRoche in Switzerland, (Swiss patent No. 532 261) with Wolfgang Helfrich and Martin Schadt (then working for the Central Research Laboratories) listed as inventors.Brown, Boveri & Cie, its joint venture partner at that time, which produced TN displays for wristwatches and other applications during the 1970s for the international markets including the Japanese electronics industry, which soon produced the first digital quartz wristwatches with TN-LCDs and numerous other products. James Fergason, while working with Sardari Arora and Alfred Saupe at Kent State University Liquid Crystal Institute, filed an identical patent in the United States on April 22, 1971.ILIXCO (now LXD Incorporated), produced LCDs based on the TN-effect, which soon superseded the poor-quality DSM types due to improvements of lower operating voltages and lower power consumption. Tetsuro Hama and Izuhiko Nishimura of Seiko received a US patent dated February 1971, for an electronic wristwatch incorporating a TN-LCD.

In 1972, the concept of the active-matrix thin-film transistor (TFT) liquid-crystal display panel was prototyped in the United States by T. Peter Brody"s team at Westinghouse, in Pittsburgh, Pennsylvania.Westinghouse Research Laboratories demonstrated the first thin-film-transistor liquid-crystal display (TFT LCD).high-resolution and high-quality electronic visual display devices use TFT-based active matrix displays.active-matrix liquid-crystal display (AM LCD) in 1974, and then Brody coined the term "active matrix" in 1975.

In 1972 North American Rockwell Microelectronics Corp introduced the use of DSM LCDs for calculators for marketing by Lloyds Electronics Inc, though these required an internal light source for illumination.Sharp Corporation followed with DSM LCDs for pocket-sized calculators in 1973Seiko and its first 6-digit TN-LCD quartz wristwatch, and Casio"s "Casiotron". Color LCDs based on Guest-Host interaction were invented by a team at RCA in 1968.TFT LCDs similar to the prototypes developed by a Westinghouse team in 1972 were patented in 1976 by a team at Sharp consisting of Fumiaki Funada, Masataka Matsuura, and Tomio Wada,

In 1983, researchers at Brown, Boveri & Cie (BBC) Research Center, Switzerland, invented the passive matrix-addressed LCDs. H. Amstutz et al. were listed as inventors in the corresponding patent applications filed in Switzerland on July 7, 1983, and October 28, 1983. Patents were granted in Switzerland CH 665491, Europe EP 0131216,

The first color LCD televisions were developed as handheld televisions in Japan. In 1980, Hattori Seiko"s R&D group began development on color LCD pocket televisions.Seiko Epson released the first LCD television, the Epson TV Watch, a wristwatch equipped with a small active-matrix LCD television.dot matrix TN-LCD in 1983.Citizen Watch,TFT LCD.computer monitors and LCD televisions.3LCD projection technology in the 1980s, and licensed it for use in projectors in 1988.compact, full-color LCD projector.

In 1990, under different titles, inventors conceived electro optical effects as alternatives to twisted nematic field effect LCDs (TN- and STN- LCDs). One approach was to use interdigital electrodes on one glass substrate only to produce an electric field essentially parallel to the glass substrates.Germany by Guenter Baur et al. and patented in various countries.Hitachi work out various practical details of the IPS technology to interconnect the thin-film transistor array as a matrix and to avoid undesirable stray fields in between pixels.

Hitachi also improved the viewing angle dependence further by optimizing the shape of the electrodes (Super IPS). NEC and Hitachi become early manufacturers of active-matrix addressed LCDs based on the IPS technology. This is a milestone for implementing large-screen LCDs having acceptable visual performance for flat-panel computer monitors and television screens. In 1996, Samsung developed the optical patterning technique that enables multi-domain LCD. Multi-domain and In Plane Switching subsequently remain the dominant LCD designs through 2006.South Korea and Taiwan,

In 2007 the image quality of LCD televisions surpassed the image quality of cathode-ray-tube-based (CRT) TVs.LCD TVs were projected to account 50% of the 200 million TVs to be shipped globally in 2006, according to Displaybank.Toshiba announced 2560 × 1600 pixels on a 6.1-inch (155 mm) LCD panel, suitable for use in a tablet computer,transparent and flexible, but they cannot emit l