tft lcd eye strain supplier

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Buy Genuine EYE PC®, Beware of cheap copies or thin films that don"t work. U.S. PATENT & TRADEMARK REG. No: 4,762,211. DUNS NO: 004043131. U.S. GOV. CAGE CODE 8EGE8.

TFT (Thin Film Transistor) LCD (Liquid Crystal Display) we are talking here is TN (Twisted Nematic) type TFT displays which is align with the term in the TV and computer market. Now, TFT displays have taken over the majority of low-end color display market. They have wide applications in TV, computer monitors, medical, appliance, automotive, kiosk, POS terminals, low end mobile phones, marine, aerospace, industrial meters, smart homes, consumer electronic products etc. For more information about TFT displays, please visit our knowledge base.

Talking about Pros and Cons of TFT displays, we need to clarify which display they are compared to. To some displays, TFT displays might have advantages, but compared with another display, the same character might become the disadvantages of TFT displays. We will try our best to make clear as below.

Excellent physical design. TFT displays are very easy to design and integrated with other components, such as resistive and capacitive touch panels (RTP, CTP, PCAP) etc.

Minimum Eye Strain: Because TFT panel itself doesn’t emit light itself like CRT, LED, VFD. The light source is LED backlight which is filtered well with the TFT glass in front for the blue light.

More Energy Consumption: Compared with monochrome displays and OLED (PMOLED and AMOLED) display, which makes TFT displays less attractive in wearable device.

Poor response time and viewing angle: Compared with IPS LCD displays, AMOLED displays and recent micro-LED display. TFT displays still need to note viewing angle of 6 o’clock or 12 o’clock in the datasheet and still have the gray scale inversion issue.

High tooling cost: Depending on which generation production line to produce and also depending on its size. Building a TFT display fab normally need billions of dollars. For a big size display which needs high generation production line to produce. The NRE cost can be millions dollars.

Sunlight Readability: Because it is very expensive to produce transflective TFT LCD displays, in order to be readable under the sunlight, very bright LED backlight (> 1,000 nits) has to be used. The power needed is high and also need to deal with heat management. If used together with touch panel, expensive optical bonding (OCA or OCR) and surface treatment (AR, AF) technologies have to be used.

With the growth of the LCD panel industry as a whole, it has become more important than ever to prevent the sun’s wash out of displays used outdoors, such as automobile displays, digital signage, and public kiosks. Hence, the sunlight readable display was invented.

One solution would be to increase the luminance of the TFT LCD monitor’s LED backlight to overpower the bright sunlight and eliminate glare. On average, TFT LCD screens have a brightness of about 250 to 450 Nits, but when this is increased to about 800 to 1000 (1000 is the most common) Nits, the device becomes a high bright LCDand a sunlight readable display.

Since many of today’s TFT LCD display devices have shifted to touchscreens, the touch panels on the surface of LCD screens already block a small percentage of backlighting, decreasing the surface brightness and making it so that the sunlight can even more easily wash out the display. Resistive touch panels use two transparent layers above the glass substrate, but the transparent layers can still block up to 5% of the light.

While in bright exterior light settings, these devices reduce eye strain as the user attempts to view the image on screen, the brightness of the display itself can also cause eye strain, seen as the brightness may overwhelm your eyes. Many devices allow the user to adjust brightness, so this concern is oftentimes not too severe.

A recent technology falling into the sunlight readable display category is the transflective TFT LCD, coming from a combination of the word transmissive and reflective. By using a transflective polarizer, a significant percentage of sunlight is reflected away from the screen to aid in the reduction of wash out. This optical layer is known as the transflector.

In transflective TFT LCDs, sunlight can reflect off the display but can also pass through the TFT cell layer and be reflected back out off a somewhat transparent rear reflector in front of the backlight, illuminating the display without as much demand and power usage from the transmissive nature of the backlight. This addresses both the issues of wash out and the disadvantages of high brightness TFT LCDs in high ambient light environments. Because of its transmissive and reflective modes, this type of device is very useful for devices that will be used outdoors but also indoors.

While it does greatly reduce power consumption, transflective LCDs are much more expensive than high brightness LCDs. In recent years, the cost has decreased, but transflective LCDs continue to be more costly.

In addition to adjustments to the internal mechanics of LCDs, it is possible to make devices more sunlight-readable using surface treatments. The most common are anti-reflective (A/R) films/coatings and anti-glare processing.

Often paired with other methods of creating sunlight readable displays is optical bonding. By gluing the glass of a display to the TFT LCD cells beneath it, optical bonding eliminates the air gap that traditional LCD displays have in them using an optical grade adhesive.

This adhesive reduces the amount of reflection between the glass and LCD cell as well as the reflection of external ambient light. Doing this helps provide a clearer image with an increased contrast ratio, or the difference in the light intensity of the brightest white pixel color and darkest black pixel color.

With this contrast ratio improvement, optical bonding addresses the root issue with unreadable outdoor displays: the contrast. Though an increase in brightness can improve contrast, by fixing the contrast itself, LCD display images in outdoor environments will not be as washed out and will require less power consumption.

The optical bonding adhesive’s elimination of the air gap also protects the LCD from moisture/fogging and dust, as there is no space for impurities to penetrate and remain under the glass layer. This especially helps with maintaining the state of LCDs in transport, storage, and humid environments.

Compiling the various methods of improving LCD screens for sunlight readability, these devices can be optimized in high ambient light settings. An anti-glare coating is applied to the surface of the glass and anti-reflective coatings are applied to both the front and back. The transflector is also used in front of the backlight. These features can result in 1000 Nit or more display lighting, without the excessive power consumption and heat production through a high brightness backlight, consequently allowing for a longer lasting and better performing LCD

Unfortunately, the process of building a reflector inside TFT LCD is complicated and transflective TFT LCD is normally several times higher cost compared with normal transmissive TFT LCD.

To further improve and enhance the qualities of the LCD, LED and cold cathode fluorescent lamp (CCFL) backlights are used. Both these create bright displays, but the LED specifically can do so without as much power consumption and heat generation as compared to the CCFL option. Optical bonding is also applied in order to improve display contrast, leading to a more efficient and better quality sunlight readable display.

I understand. I was hoping, that someone else with a similar sensitivity as me, could perhaps suggest a technology that is very similar to the aforementioned CCFL-backlit screen. A technology that is easy on sensitive eyes. Like my AMOLED screen on my Samsung Galaxy S2 phone or S2 Tab. It is also relatively mild on the eyes, for me at least.

Not to sound rude but, I am getting a bit tired of people who think that I need a: flicker-free, IPS, high resolution, or whatever monitor and that the problem will magically go away. I tried so many different monitors, and somehow, the only one that my eyes can fully handle is the TFT LCD (as I wrote in my original message).

I have never seen a regular PC monitor that looks like the one on the pictures that I posted. Dark green, glossy, visible "pixels". So I am starting to wonder what was so special about those monitors back then. And which current technology could be a good replacement. (eye sensitivity wise)

The Fellowes Compact TFT/ LCD Monitor Riser is suitable for use with either flat screen TFT or LCD monitors and has been ergonomically designed to help reduce shoulder, neck and eye strain. The unique height adjustment allows for individual customisation from 76mm to 114mm to ensure a comfortable viewing angle can be adopted. The monitor platform is able to rotate 45 degrees to accommodate quick and easy shared viewing of the screen.

The Reticare Eye and Screen Protector for Laptops with 17.3-inch screen and smaller protects your eyes as well as your screen. Film can be trimmed to size to perfectly fit your device.

The Reticare Eye and Screen Protector helps shield your eyes from the damaging HEV (High Energy Visible) blue light emitted by digital device screens and also protects your screen from scratches. It adheres to the screen and is touch-sensitive for easy scrolling.

Don"t let those amazing digital devices that you and your loved ones love to use— for hours and hours a day— do harm to your eyesight or theirs. Reticare helps reduce the risk of eye strain, blurred vision, dry eyes, headaches, sleep disorders, and retinal damage such as Macular Degeneration.

Reticare is a registered trademark. All rights reserved. Reticare Eye Protectors are certified and sold only in select stores and websites. Beware of non-certified, counterfeit products that may resemble Reticare products but are manufactured and sold by some unknown company— they are not genuine Reticare Eye and Screen Protectors. For the best in eye protection, always buy real Reticare products.

Whether in the home or office, we find ourselves staring at computer monitors for hours on end. Today"s digital lifestyle brings with it increased health risks, especially for our eyes. Being in front of a computer all day increases the risk of Computer Vision Syndrome (CVS).

ASUS Eye Care technology has been designed to prevent CVS symptoms caused by prolonged computer use. With ASUS Eye Care technology, ASUS monitors ensure a comfortable viewing experience while keeping your eyes healthy at the same time.

TFT stands for thin-film transistor, which means that each pixel in the device has a thin-film transistor attached to it. Transistors are activated by electrical currents that make contact with the pixels to produce impeccable image quality on the screen. Here are some important features of TFT displays.Excellent Colour Display.Top notch colour contrast, clarity, and brightness settings that can be adjusted to accommodate specific application requirements.Extended Half-Life.TFT displays boast a much higher half-life than their LED counterparts and they also come in a variety of size configurations that can impact the device’s half-life depending on usage and other factors.TFT displays can have either resistive or capacitive touch panels.Resistive is usually the standard because it comes at a lower price point, but you can also opt for capacitive which is compatible with most modern smartphones and other devices.TFT displays offer exceptional aspect ratio control.Aspect ratio control contributes to better image clarity and quality by mapping out the number of pixels that are in the source image compared to the resolution pixels on the screen.Monitor ghosting doesn’t occur on TFT displays.This is when a moving image or object has blurry pixels following it across the screen, resembling a ghost.

TFT displays are incredibly versatile.The offer a number of different interface options that are compatible with various devices and accommodate the technical capabilities of all users.

There are two main types of TFT LCD displays:· Twisted nematic TFT LCDs are an older model. They have limited colour options and use 6 bits per each blue, red, and green channel.

In-plane switching TFT LCDs are a newer model. Originally introduced in the 1990s by Hitachi, in-plane switching TFT LCDs consist of moving liquid pixels that move in contrast or opposite the plane of the display, rather than alongside it.

The type of TFT LCD monitor or industrial display you choose to purchase will depend on the specifications of your application or project. Here are a few important factors to consider when selecting an appropriate TFT LCD display technology:Life expectancy/battery life.Depending on the length of ongoing use and the duration of your project, you’re going to want to choose a device that can last a long time while maintaining quality usage.

Image clarity.Some TFT displays feature infrared touchscreens, while others are layered. The former is preferable, especially in poor lighting conditions or for outdoor and industrial applications, because there’s no overlay and therefore no obstructions to light emittance.

The environmental conditions make a difference in operation and image clarity. When choosing a TFT for outdoor or industrial applications, be sure to choose one that can withstand various environmental elements like dust, wind, moisture, dirt, and even sunlight.

As a leading manufacturer and distributor of high-quality digital displays in North America, Nauticomp Inc. can provide custom TFT LCD monitor solutions that are suitable for a multitude of industrial and commercial indoor and outdoor applications. Contact us today to learn more.

In the modern world, our eyes are constantly bombarded with information from displays. Whether it be from a laptop, smartphone, or some other device, many of us spend a significant portion of our day staring at some kind of display. As such, it is paramount that we should understand the strain placed on our vision and some steps we can take to improve and protect the health of our eyes.

Our eyes are constantly fed information through screens. Most of us have jobs that require us to look at a computer display of some kind for several hours a day. After work, we head home and stare at screens throughout the evening and well into the night. It"s no wonder, then, that many people complain of eye strain, blurred vision, or headaches after a long day of work. These symptoms and others, collectively known as computer vision syndrome (CVS), may affect as many as 90% of people who use a computer monitor, tablet, or other electronic display during the workday.

So what can we do about CVS? There"s no escaping the fact that many jobs require computers and, thus, require staring at a screen. In this article, we will discuss a few things you can do to reduce eye strain and alleviate some symptoms of CVS. We will also offer a list of laptop features that may adversely affect our eyes and what facets of notebooks may lighten the ocular load. Finally, we will offer a short list of some recommended laptops with high-quality screens that have some of these vision-saving features.

The good news is that there are several steps you can take to minimize or outright prevent symptoms of CVS. Our eyes work like biological cameras; they are constantly focusing on an image, taking in light, and transmitting visual data to our brain for interpretation. By understanding how our eyes look at electronic displays, we can better control the stress placed upon them. The following list is by no means exhaustive, but these tips should help you if you consistently suffer from headaches, blurry vision, eye strain, or other common problems associated with CVS. Best of all, these are simple solutions that shouldn"t require you to buy new equipment or change your working situation.

Refocus your eyes periodically. Perhaps the best way to protect your vision is to give your eyes a break. If you spend an extended period of time in front of a computer monitor or other display, look away from the screen every 20-30 minutes. Pick out a distant object or spot on a faraway wall and focus on it for about 30 seconds. This refocusing removes the immediate strain placed on your eyes, and focusing on a distant object will help relax the muscles that control your eye.

Blink often. Blinking coats our eyes with tears and helps clear out any dust or particles that have found their way past our eyelashes. While blinking is an automatic reflex, some studies show that blinking rate is significantly reduced when we actively process information, such as when we are working at a computer monitor. This can lead to our eyes feeling dried out and may damage them over time. Like above, take a break every 20-30 minutes and intentionally blink your eyes very slowly 10 or more times. This will spread new tears over your eyes. You may also want to purchase lubricating eye drops if you suffer from very dry eyes.

Adjust your lighting. Some lighting situations can actively damage our eyes, particularly bright environments. There"s a reason why we squint when we step outdoors on a sunny day; our pupils contract, which requires some muscles in our eyes to stay flexed. If you can, turn down the lights in your office and partially block any ambient light coming in from outdoors. Turning off overhead lights or fluorescent bulbs can also help. Incandescent and halogen bulbs are easier on our eyes, and placing them lower down to offer indirect light can help reduce strain.

Adjust your display"s settings. Most modern LCD monitors and laptop displays allow the user to edit some settings. Lowering the brightness of your computer"s display will reduce ocular stress, similar to turning down ambient lighting. There is a threshold, though; if the computer screen is too dim, it can actually cause worse eye strain. Find a good sweet spot by incrementally stepping down the display"s brightness until your eyes aren"t squinting or straining too much to read text or view images. You can also download software to filter out blue light. Blue light has a shorter wavelength than red light and thus can cause greater eye strain, particularly if viewed at night. Blue-light filtering software shifts the color gradient of your computer"s display toward the red end of the light spectrum, increasing the wavelength of emitted light and reducing stress. A good app for this is f.lux, which can be set to automatically shift your display throughout the day. F.lux is free for personal use and is available for Windows, Mac, Linux, Android, and iOS (jailbreak required).

In addition to the tips listed above, there are some laptop-specific factors that can directly affect our vision. Laptop screens vary widely from model to model, and there is no one perfect laptop screen when it comes to eye health. Still, here are a few things to keep in mind when you purchase your next laptop.

Matte screens are easier on the eyes. Perhaps the most noticeable facet of a laptop"s screen is the finish across the panel. Laptop displays have either a glossy or matte finish to them. Glossy panels allow more light to pass through from the LCD backlight and are typically brighter and more color accurate. However, glossy displays have a major weakness: reflections. A glossy finish will typically show reflections at lower brightness levels, which can distract our eyes and cause them to constantly shift focus, resulting in increased fatigue. Matte finishes, on the other hand, are made specifically to cut reflections. Matte displays typically show no reflections, making them highly usable in almost any lighting condition (provided the backlight is bright enough). Matte screens do sacrifice some color accuracy and brightness, but most are more than good enough for users that don"t routinely work with color.

Higher resolutions make everything sharper. Most modern laptops come with either a 1366x768 or 1920x1080 resolution screen, which is acceptable for most work. However, users that suffer from eye fatigue may want to consider getting a higher resolution display. A higher resolution means a higher pixel density, which can make text and images look much sharper. While a high-resolution screen will make icons and other UI elements smaller at the display"s native resolution, both Windows 10 and Mac OS X have excellent scaling options. Text on a 4K screen set to 200% scaling will look much crisper than text on a 1080p screen at native resolution.

Backlight brightness matters. While it"s important to control the intensity of light coming out of a laptop screen, making sure that the LCD backlight is bright enough to remain visible is equally as important. A screen with too dim a backlight can be hard to see in some lighting conditions, causing our eyes to strain to view the display. A backlight that can climb to 300-350 nits should be sufficient for most environments.

Poor contrast muddies up the display. Also worth considering is the contrast ratio and black levels of a display. Poor contrast can result in blurry or muddy images with ill-defined boundaries. This can subsequently force our eyes to constantly refocus in order to make sense of the boundaries of an on-screen picture or text. A contrast ratio of 1000:1 or higher will be adequate for most users.

PWM can be a headache. Many laptops rely on pulse-width modulation to dim the LCD backlight. We have written a detailed article on the issue, so suffice it to say that higher PWM causes less strain on the eyes. Laptops with low PWM (<500 Hz) can cause eye fatigue, headaches, and other adverse symptoms in some users. We measure the PWM (or lack thereof) of almost every device that crosses our test bench, so be sure to check a specific laptop review before buying to see if PWM is problematic.

Now that we know what to look for in a laptop, here is a list of some suggested devices that meet most of the criteria listed above. Again, there is not one "perfect" laptop when it comes to eye health. Still, the following devices come close and should help alleviate eye strain. Remember, the best way to protect your eyes is to take action yourself.

The laptop display that ticks the most boxes perhaps belongs to the 14-inch HP EliteBook 840 G5. The FHD panel is reasonably pixel-dense (157 PPI), has a good contrast ratio (1170:1), and is fairly color-accurate. What really sets the EliteBook 840 G5 apart is its backlight, which is one of (if not the) brightest on the market right now. The screen shines at an insane 630 nits on average, and the backlight is very evenly distributed (93%). In addition, the matte finish across the panel eliminates reflections and allows for use in all but the brightest conditions. While the 14-inch display may be too small for comfortable viewing from a distance, the EliteBook 840 G5 offers one of the best displays for eye health on the market today.

The Dell XPS 15 has long been touted as the Windows alternative to Apple"s MacBook Pro line for many reasons, but the display is often one of them. While Dell offers an alternative SKU of the XPS 15 9570, its glossy panel readily shows reflections and is thus not as conducive to eye health as its FHD matte sibling. While PPI could be higher on the FHD panel, the screen is pixel dense enough for most users. What makes the FHD XPS 15 9570 a good choice is its bright and relatively even backlight, its excellent contrast ratio, and matte finish. PWM is high enough that it will not bother most users, although some very sensitive eyes may be affected. Despite these small compromises, the FHD XPS 9570 is perhaps the best balanced display when it comes to eye health.

For those that want a larger screen, it"s hard to beat the 4K Lenovo ThinkPad P71. The 17.3-inch display is large enough to be easily viewed from a normal working distance, and the 4K resolution packs 255 pixels into every square inch. The 4K P71 offers a good contrast ratio (1155:1), good viewing angles, great color accuracy, and a matte finish. Its main weakness lies in the display backlight, which is somewhat dim (~330 nits) and uneven, making outdoor use more difficult than with the EliteBook 840 G5 or the XPS 15. The P71 is perhaps the best large display and one of the best for eye health.

Our eyes are one of our greatest resources, and keeping them healthy is important. As our lives focus more and more on electronic displays, the task of protecting our vision becomes increasingly difficult. Still, there are some laptop displays that are noticeably easier on the eyes than others. That being said, the most important thing to remember when it comes to keeping your eyes healthy is to take action yourself. Look away from your screen periodically and give your eyes a rest. This is the best way to ensure your eyes keeping looking good (pun intended) for years to come.

Contrary to popular belief, sitting too close to the TV is not bad for your eyes. Years ago, safe TV viewing distance was a popular subject of debate, as the medical community warned television consumers about the dangers of radiation from TV sets.

While the concern was legitimate, the danger is not an issue today because of the invention of LCD and plasma televisions. These modern flat-panel screens do not emit radiation.

However, many people still worry that they may injure their eyes by sitting too close to the TV. While sitting close to the television will not cause injury to your eyes or vision, close viewing may cause temporary ​eye strain or eye fatigue.

Some eye care professionals recommend sitting approximately 8 to 10 feet away from the TV screen. The general rule of thumb is to be at least five times the distance from the screen as the screen is wide. For example, if your television is 32 inches wide, the optimal viewing distance is 160 inches or about 13 feet.

Whether you hang your TV on the wall or set it on a tabletop, try to position it at eye level or lower to prevent straining your eye muscles or your neck. Constantly looking up will eventually cause these muscles to fatigue.

Lastly, as different types of screens have become more common in homes, the American Optometric Association promotes the 20-20-20 rule. They suggest that you take a 20-second break every 20 minutes to view a distant object that is at least 20 feet away. So, for example, if you watch your favorite movie or TV show on your laptop, take regular breaks to avoid eye strain.

The detail of a 4K high-definition (HD) TV screen and even a regular HD TV screen allows for a closer viewing distance than a standard television screen. The pixels are smaller with these types of televisions, making it easier for the eyes to see up close.

Eye strain, or asthenopia, is an eye condition that causes a variety of symptoms, including fatigue, pain in or around the eyes, blurred vision, and occasional double vision.

Symptoms can occur after watching television at a close distance, reading, doing computer work, or performing any close activities that use the eyes. Attempting to focus on a close object for an extended period of time can tire the ciliary muscles that move the eyes, producing the symptoms of eye strain. Symptoms include:

The average person blinks around 18 times a minute, naturally refreshing and lubricating the eye. But some studies have shown that people may only blink half as often (or less) while looking at a television or computer screen. Blinking so seldom often results in dry, tired, itchy, and burning eyes.

Besides sitting too close, watching too much television, especially in the dark, can cause eye strain due to constantly focusing on a small, bright object. The dark room causes the irises of the eyes to open wider in order to let in more light, but they fail to close as much as they should to focus on the bright screen.

If you experience the symptoms of eye strain after watching television or looking at your smart device, here are a few things you can do to help alleviate your discomfort.

It seems that many kids today tend to watch content or play video games on their iPads and smartphones more than they watch television. Should parents monitor how close their kids hold their screens away from their eyes?

Most eye care professionals agree that tablets, phones, and laptops are harmless to eye health and vision. However, these devices can cause eye strain, much like watching a television. Symptoms can develop due to focusing on a much smaller screen at a very close distance to your eyes.

Make sure that your child holds their screen about arm’s length (18 to 24 inches) away from their eyes. Your child should view the screen at the level of their eyes or slightly below. Handheld digital devices such as smartphones should be held below eye level.

If your child seems to have difficulty holding their devices at this distance, enlarging the text on the screen may help. Adjusting text size can sometimes make viewing more comfortable. Also, to help prevent eye strain from occurring, encourage your kids to take frequent breaks from the screen to give their eyes a rest from focusing.

Due to the advancements of modern television screens, watching TV up close will not injure your eyes. However, watching TV from a close distance may lead to eye strain or fatigue. It is generally recommended that you sit at least five times the distance away from the screen as the screen is wide.

If you tend to experience eye strain or eye fatigue frequently, consider asking your eye doctor for advice. Your eye doctor will conduct a comprehensive eye examination to identify possible underlying causes of eye strain and offer ways to alleviate it.

Also, know that viewing distance preferences can vary from person to person, and symptoms of eye strain or eye fatigue may improve with a few adjustments. You may find that sitting a bit further than usual from your television, getting a bigger or higher-definition television, or adjusting the display settings may be easier on your eyes.

Yes, TVs emit blue light. Contrary to popular belief, you will not get eye damage from exposure to blue light emitted by devices like your phone, tablet, and TV. However, it is still a good idea to be mindful of how much screen time you get, especially before bed. Late-night watching on blue light screens can make falling asleep more difficult.

While watching a lot of TV will not cause eye damage in children, too much TV-watching may lead to eye fatigue or eye strain. Studies also suggest that children who spend more than four hours per day watching TV or using media are more likely to be overweight.

Sheppard AL, Wolffsohn JS. Digital eye strain: prevalence, measurement and amelioration. BMJ Open Ophthalmol. 2018;3(1):e000146. doi:10.1136/bmjophth-2018-000146

Pulse Width Modulation is something you will hear talked about quite a lot nowadays. We have a full detailed article about PWM which is worth reading through. In simple terms, PWM is a method used for dimming a monitors backlight whereby the backlight is turned off and on rapidly to simulate lower brightness levels. As you decrease the brightness setting of the screen the “off” periods are increased in length progressively and this in turn leads to a lower luminance output for the display (darker image). The problem with PWM is that on modern LED backlights the rapid turning of the backlight off and on can lead to flickering. Sometimes when the frequency of the PWM is low this might even be visible to some users. In other cases, while it might not be visible the user may still experience unwanted side-effects of its use including eye-strain, headaches, eye fatigue and even nausea.

To overcome this, many manufacturers now actively promote their use of flicker-free backlights and have done away with PWM completely. If you are sensitive to the use of PWM or are just worried about your eye health, we would certainly recommend trying to avoid displays where PWM is used.

While TFT screens are best run at their native resolutions, it is possible to run them at lower resolutions if need be. In doing so the screen must interpolate the image from below the native resolution, leading commonly to some loss in image clarity and sharpness as the image is stretched across pixels. In office use this can be a problem and can look quite poor, but in gaming, it is generally not so much of a problem. The ability of a TFT to interpolate the image depends on the particular panel and scaler used, and some manufacturers have been able to improve the ability of their panels to run outside the native resolution. Generally though it is not recommended to run outside the native resolution on a TFT if you can help it. Where resolutions are very high (e.g. Ultra HD / 4K) then you will still want to run the display at the full native resolution, but enabled operating system scaling to make everything easier to see.

On modern IPS panels when viewing a black image there is typically a characteristic white glow when viewed from an angle, commonly referred to as “IPS-glow”. This is common on most modern IPS-type panels and can be distracting to some users. The level of glow shown here is pretty typical of a modern IPS-type panel. If you view dark content from a normal head-on viewing position, you can actually see this glow slightly as your eyes look towards the edges of the screen if it is of a large size. The wider the screen and the bigger it is, the more likely you are to see some glow from your normal viewing position as you glance towards the edges. A curve to the screen can help reduce this a little as the angle between your eyes and the edges is reduced a little. Some people may find this IPS-glow problematic if they are working with a lot of dark content or solid colour patterns. In normal day to day uses, office work, movies and games you probably wouldn’t really notice this unless you were viewing darker content. If you move your viewing position back, which is probably likely for movies and games, the effect reduces as you do not have such an angle from your eye position to the screen edges.

The Screen Door effect is so called because sometimes it is possible to clearly see the individual pixels in a panel and the gaps between them. This is quite rare, but can be distracting if you are using a TFT up close. It may be more apparent where pixel pitch is large (e.g. a large screen with a relatively low native resolution / number of pixels in the matrix).

Input lag is described as the lag between the output from a graphics card and the image which is displayed on the screen you are using. For LCD screens this should not be confused with pixel response time which describes the speed at which a pixel can change from one orientation to another. Pixel response times impact aspects such as motion blur and ghosting in moving images. On the other hand input lag is a delay between what is sent to the monitor, and what you actually see. This can have impacts particularly in gaming where if the screen is lagging at all, it can have adverse affects on first person shooter games and the likes where every millisecond counts. Lag is more about the ‘feel’ of delay.

The level of lag really depends on the TFT display, and is controlled by many signal processing factors including, but not limited to the internal electronics and scaling chips. Some manufacturers even take measures to help reduce this, providing modes which bypass scaler chips and options which reduce the input lag. These are often reserved for gamer-orientated screens but the results can be quite noticeable in some cases. Where NVIDIA G-sync modules are used you will tend to see very low levels of lag as well, as the screen does not have a scaler present.

Cleartype was introduced by Microsoft for use with LCD displays to make fonts more rounded and less jagged. This is effectively a filter used to blur the fonts a little which some people prefer the look of. This can vary from one TFT to another, and it is easy enough to turn on and off to allow you to decide which you prefer. Microsoft’s article about the Cleartype filter can be found here:

Image burn in was traditionally a problem with CRT displays, where prolonged images on the screen could leave a ghost image behind after it has changed. This was a problem with older CRT displays and was the reason for the introduction of screen savers. With TFT’s this is not really a major problem as the image cannot be burnt into the screen by the cathode ray gun, as the pixels all operate individually. Some screens can very occasionally show some lasting imprint of an image if the same picture is left on the screen for long periods of time, but it is generally not permanent. This can often be easily solved by looking at some fast moving scenes or gaming. For the sake of electricity more than anything else though, it is probably easiest to use the power settings on your PC to turn the screen off when not in use.

One of the main concerns people have when buying a TFT relates to the problem of dead pixels. Pixels can sometimes be ‘dead’ (stuck on black or white). Sometimes the sub pixels which make up the pixel can be dead which leaves the pixel looking red, green or blue. Sometimes the sub pixels can be ‘lazy’ and with a bit of luck can come back to life.

Dead pixels / sub pixels defects are normally caused during the manufacturing stage, and it is very rare for a panel to generate a pixel fault at a later stage unless you have a tendency to prod the screen. Nowadays, manufacturing levels are very good and it is quite rare for a pixel to be ‘dead’, and you will see some manufacturers like Samsung and ViewSonic for instance, offering zero dead pixel policies. Dead sub pixels are still a problem, and the policy will not cover these in most cases. Dead pixels are not really considered a fault with a TFT monitor and you will need to consider this before purchasing. Refer to the manufacturer to find out what their dead pixel policy is.

The OSD refers to the “On Screen Display” available on nearly all TFT monitors. This allows the user to change settings ranging from brightness, contrast and colour levels (typically RGB) to more advanced features like aspect ratio and monitor preset modes instance. One thing to note is that some features like contrast, phase and pixel clock are only available when using the VGA (analogue) interface and become greyed out when using the DVI (digital interface) as they are no longer required. Proper configuration of a monitor requires RGB levels to be altered and brightness and contrast to be set correctly. More advanced features are often accessible and modern OSD often offer a wealth of selections. Some OSD also offer factory menus and information about the screen or panel being used which can be particularly useful for the enthusiast.

It is possible to detach the stand from some TFT models and instead mount them to a swinging arm on a wall or desk. If this is something you might wish to do, look for TFT’s which specify compatibility with VESA mounts. These can provide improved alignment of a monitor and easier use depending on your needs.

As we all know, AMOLED screen is a screen made of self-luminous organic materials. It does not require LCD backlight. When current passes through organic materials, pixels will emit light by themselves. Therefore, compared to LCD screens, AMOLED has more Pure black, higher contrast and other display advantages.

However, being more "ideal" also means paying more. The "eye-damaging" of AMOLED displays stems from external dissatisfaction with the current widespread adoption of PWM low-frequency dimming by AMOLED manufacturers. Here is a brief explanation of the PWM low frequency dimming technology.

LCD screens rely on LED backlight panels to emit light. Therefore, in the field of smart phones, LCD screens mostly use DC dimming. This is a technology that directly adjusts the brightness of the two sides of the light-emitting component to adjust the brightness. The smaller the current, the lower the brightness.

DC dimming is relatively straightforward, but it also has a big disadvantage. Due to the different wavelengths of the three primary colors, DC dimming can cause unavoidable color casts under extremely low brightness conditions, such as early LCD displays with DC dimming , At low brightness, there will be obvious problems of discoloration.

Unlike DC dimming, which directly adjusts the current to control brightness, PWM dimming is more clever. Everyone knows that switching the light source will cause flicker. The faster the switching speed, the faster the flicker. When the frequency of switching the light source exceeds the limit of the human eye, the brightness of all pictures is superimposed in the human eye, so the frequency will affect the brightness of the screen. This technique is called PWM dimming (pulse width modulation).

However, with PWM dimming, even if the human eye cannot sense the picture change during the switching process, we will respond to this phenomenon. It is more likely to cause fatigue on the muscles on both sides of the eyes, thereby stimulating the refraction system to accelerate vision Ageing.

At present, Samsung ’s AMOLED screens use 250Hz low-frequency PWM dimming technology. When the screen brightness is lower, the possibility that the human eye can perceive becomes larger, and it is more likely to affect sensitive people.

AMOLED displays that use PWM low-frequency dimming for a long time do seem to affect vision, but do n’t think that LCD can survive. Even with DC dimming, it also has an irreversible effect on vision-cannot be ignored Blu-ray hazard.

Different from the AMOLED self-emission mode, the LCD screen uses a combination of backlight and filter imaging. In mainstream technology, many LCD screens will use blue LED backlight panels, which are covered with red, green and colorless three. This kind of filter forms three primary colors of RGB when blue light passes through these three filters.

Among them, the short-wave blue light emitted by the blue backlight board can cause harm to human eyes. Because short-wave light has a greater capacity density and is more penetrating, it will directly penetrate the lens to the retina, causing atrophy or death of retinal pigment epithelium cells.

From a technical point of view, whether it is an LCD or an AMOLED screen, the impact on vision is universal. As far as smartphones are concerned, it cannot be said that AMOLED screens are more eye-damaging than LCD screens.

Even if the LCD party held high the banner that PWM low-frequency dimming is harmful, it could not fully prove that AMOLED screens have an impact on vision, because everyone"s habits of using mobile phones are different, and the impact on everyone is different. There is no doubt that in the end, it is still the habits that need attention. For example, users should try to avoid watching the phone screen for a long time; reduce the viewing time of LCD and AMOLED low brightness in the dark environment.

According to statistics, a modern person uses a PC or smartphone for up to 10 hours a day. Of course, this mode significantly increases the load on the eyes. Therefore, this aspect excites many people.

Usually, a person blinks about eighteen times per minute. This frequency provides constant hydration with tear fluid. But while working on any display, a person on average blinks only 2-3 times per minute. Accordingly, hydration is reduced by almost 10 times. As a result, the eyes begin to watery.

Myopia due to eye fatigue, can be true or false. False myopia due to spasms of the eye muscles reduces the clarity of image perception. But these sensations quickly disappear even after a short rest. Unfortunately, the constant tension of the eye muscles provokes the occurrence of true myopia, in which the shape of the eyeball is slightly elongated.

In this case, the person is forced to constantly use glasses. But choosing a model with optimal screen can minimize these risks. Of course, camera, smartphone performance, smartphone storage, operating system, price, etc remain the main criteria when choosing a model. But screen with optimal PPI (pixels-per-inch), brightness and backlight technology will reduce eye strain.

In terms of ophthalmology, eye fatigue is inversely proportional to image clarity. In other words, the eye strains as much as possible when viewing a blurred image. As known, PPI is the ratio of resolution (in pixels) to diagonal size (in inches) and directly affects the image clarity. Therefore, a small screen with high resolution requires much less eye strain compared to a large screen at low resolution. In fact, at low resolution the eye is constantly forced to adjust the sharpness, which leads to fatigue of the eye muscles.

For example, the PPI of a 4.3-inch HD (720 × 1280) screen reaches 342, and the PPI of a 4.7-inch HD display does not exceed 312. Accordingly, the first model will be more comfortable for the eyes.

But the screen brightness also depends on its type. For example, LCD screens use continuous backlight technology. Therefore, the bright light from the backlight LEDs constantly affect the eyes.

As known, all OLED displays, including AMOLED, Super AMOLED, Super AMOLED Plus, P-OLED and Dynamic AMOLED, use their own radiation from organic diodes and do not have a backlight. As a result, the eye perceives light only from active pixels on the screen. At the same time, all other screen pixels are completely black. Of course, such a screen has a minimal effect on the eyes. But many users consider the higher brightness of the LCD vs AMOLED a plus.

Thus, OLED models with high PPI minimize eye strain. But today only expensive models have large screens with high PPI. Mid-budget models provide no more than 300 ppi for 5-inch screens. In addition, the relatively low brightness of OLED screens reduces the saturation of colors.

Overall, protection eyes when working with gadgets is becoming one of the main trends in this segment. Today manufacturers have already significantly lowered blue light level, Xiaomi is successfully developing DC Dimming (flicker reduction) , and many companies offer flicker-free AMOLED smartphones.

In particular, IPS screens are the eye safest because they use high frequency PWM (Pulse Width Modulation) to adjust brightness, which exceeds 2,000 Hz. For comparison, ophthalmologists consider a pulsation frequency of 300 Hz and higher to be safe.

AMOLED displays use a lower frequency. For example, many budget smartphones with AMOLED screens use frequencies below 240 Hz. As a result, the eye perceives screen flickering, which increases fatigue. Today, the list of models with AMOLED or Super AMOLED matrix and with an eye-safe PWM frequency includes: