is lcd display good for eyes factory

Is LCD or AMOLED better for eyes？The full English name of LCD is Liquid Crystal Display, which is a general term. According to its driving method, it can be divided into various specifications. Most monitors and laptops on the market today are thin-film transistors. Because TFT has better color saturation and viewing angles than other technologies, it is also the mainstream specification on the market today. The models on the market are mainly based on TFT, and LCD has now become synonymous with the term TFT display. Next, I will tell you in detail which LCD screen or OLED screen is better for the eyes.

Both OLED and LCD can cause damage to the eyes, because both OLED and LCD emit blue light, which is unavoidable. However, users can turn on the eye protection mode of the mobile phone to reduce the damage of blue light to the eyes. In addition, OLED"s dimming technology and LCD"s blue backlight are also one of the reasons for the "eye-hurt". OLED adopts PWM low-frequency dimming technology, which is a technology that adjusts the brightness through the rapid flickering of the light-emitting unit, so looking at the screen for a long time will cause eye fatigue. The blue backlight of an LCD monitor emits high-energy short-wave blue light.

In terms of manufacturing process, OLED adopts self-luminous technology and has no backlight layer, so this screen can be made very thin. In addition, each light-emitting unit of OLED can emit light independently when it emits light, and has the function of color screen display. LCD is composed of backlight layer, liquid crystal layer, color filter and other components, and the screen is made of inorganic materials, so the service life of this screen is relatively long.

Is LCD or AMOLED better for eyes？The above is the difference between lcd and oled. Users should try to avoid staring at the phone screen for a long time. Reduce LCD and AMOLED viewing time in dark environments. If you have the habit of reading late at night, you also need to turn on a light to neutralize the strobe light. Moisten your eyes with eye drops when your eyes are dry.

see the light flickering at a very high frequency, thestroboscopicdoes exist. If thestroboscopicfrequency is very low, it can be easily observed by human eyes.

Continuous usage of LCD screens can impact your eyes in few bad ways, that’s why LCD screens are bad for your eyes. For instance, long hours of usage of these screens can cause digital eye strains or the blink rate of your eyes to drop a little. Your eyes can start feeling tired and some sort of blurry vision.

Although, these problems are temporary often, and only get worse in few cases (who doesn’t care for their eyes while using an LCD screen). If you keep blinking the eyes during LCD screen usage, it’ll surely help in keeping them relaxed.

LCD screens (mostly) contains florescent cathode (cold) backlight display, other screen type LED however uses the emitting diodes that are light and are safer over the eyes. Plus, the cathode rays of LCD can be harder on your eyes. So, it is not that safe for the eyes as the other type is.

Experts say that screens like a computer, phone, tablet screens are not that much harmful over the eyes as we think. They can cause temporary damage like blurred vision (for a short time), tiring eyes, redness, etc. that can be resolved with time. But in only a few cases it gets worse but still can be treated.

Although both screen types have their significant pros and cons. But in the case of the eye’s OLED screen is considered a better option. Because they provide better viewing angles, resolution powers, better contrasts, etc. in comparison to the LCD screens.

Discoveries by scientists suggest that LCD screens leak few chemicals almost in every surrounding (environment). And these particles (chemicals) get toxic with time. Also, the breakdown of these chemicals is not easy and takes time, this increase causes a high mobility rate in the environment.are led screens bad for your eyes

Robert Smith is a technology lover and loves to write about laptops, monitors, printers, tablets, Apple products and anything that"s related to computers and games. He is passionate enough that he maintains this blog regarding tech updates on a daily basis.

“I’ve changed to a high-end smartphone with an OLED screen, but my eyes feel uncomfortable.” More and more netizens have this problem. Do OLED screens really hurt our eyes? Recently, a reporter investigated this phenomenon.

“I would never have thought that my eyes were becoming uncomfortable after using a new mobile phone for a few days.” Recently, a netizen reported this issue.

She went to see a doctor and was diagnosed with floaters. The doctor advised her to use her mobile phone less. It is strange that her symptoms were relieved after she changed back to her old mobile phone.

According to the reporter’s investigation, quite a few users have such questions. There are nearly 400,000 related links in Google search for “Eyes hurt by OLED screens“. Many related posts have resonated with netizens because they also had this symptom.

The problem is, do OLED screens really hurt our eyes? The reason why you feel uncomfortable when using mobile phones with OLED screens is that they flicker.

LCD screen usually uses LCD backlight to realize screen luminescence, the flickering frequency of which can reach several kilohertz (Hz) that flickering will basically not occur. The pixels for OLED screens are self-luminous, the low power of which has limited its flickering frequency. At present, the flickering frequency of the PWM dimming of OLED screens on many mobile phones is about 215Hz-250Hz.

IEEE (Institute of Electrical and Electronics Engineers) once reported that the range of flickering frequency with low health risks is above 1250Hz. “Flickering may lead to migraine and other diseases.”

In the eyes of communication industry professionals, this value is not high. But even the medical circle has not given a clear answer to this question, which is a great controversy in the industry.

Jie Chuanhong is the director of the ophthalmology department of the Eye Hospital of China Academy of Chinese Medical Sciences. He said in an interview that whether you watch the mobile phone screen, computer screen, or iPad screen for a long time, it is easy to cause visual fatigue, which should not be directly related to the screen.

“There is no direct relationship between OLED screen and eye harm.” Communication industry professionals also said that human eyes are almost imperceptible to the flickering of OLED screens. “Visual fatigue may be caused by staring at the screen for too long.”

Some experts claim that both LCD and OLED screens can harm human eyes because they will emit blue light harmful to the eyes, which is inevitable. However, OLED has a way to avoid this problem, enabling the eye-protection mode (similar to PWM dimming) and changing the color tone of the screen to yellowish.

Many netizens also suggested that when using smartphones with OLED screens, we should increase the brightness as much as possible because the lower the brightness, the more harmful it will be to our eyes. When the brightness of the screen is reduced, the screen of the smartphone will further reduce the flickering frequency.

Some ophthalmologists suggest that “human eyes have different perceptions of OLED flickering, and some people are more sensitive. Sensitive users had better use smartphones with LCD screens.” There has not been a unified medical statement about this conclusion.

Some netizens even made a comparison experiment: you can obviously feel that the screen of P30 Pro is not as good as that of Mate20 Pro. This is easy to understand. Different mobile phones may use different screens, and manufacturers such as Samsung, LG, and BOE have different technologies and product quality.

Some experimental results have shown that screen size is not the main factor influencing visual fatigue but the material and physical properties of different electronic screens.

Even for the same mobile phone, whether the screen is good or not depends on “luck”. Because different brands of OLED screens may be used in the same mobile phone model, in many cases, the mobile phone manufacturer will not specify this, nor does it list the screen provider in detail in the user manual.

For example, Mate20 pro screen suppliers include BOE and LG, and some of their products have experienced “green screen” events after being released on the market. According to media reports, all the mobile phones with green screen problems are those with LG screens. That is to say, the screens in the same mobile phone model may be different for the same price. Whether the mobile phone is good or not depends on luck.

This is almost a common problem in the industry. Initially, both the iPhone XS and XS MAX were equipped with Samsung’s OLED screens. But then Apple listed LG as its second iPhone XS screen supplier. In other words, LG screens may be used in the subsequent batches of iPhone XS and XS MAX. Whether consumers buy LG screens or Samsung screens depends on luck.

The color of OELD screens is more vivid, fuller, and realistic. High-end smartphones have been equipped with OLED screens, which have become the mainstream; LCD screens have been used for low-end smartphones, which are no longer the preferred choice.

Why did this happen? “Terminal products such as the ones with fingerprints under the screen and ultra-thin products can only be realized by using OLED screens.” It has become a common recognition in the industry.

Now there is good news BOE suddenly announced that it has successfully developed fingerprint technology under LCD screen, which will be mass-produced by the end of this year.

It is unrealistic for the mobile phone industry to return to LCD screens from OLED screens, and even some people think it means the degeneration of technology. From the perspective of eye health alone, LCD screens will also emit blue light harmful to human eyes. If we really want to protect our eyes, we must reduce the time consumed by smartphones.

Responsible for performing installations and repairs (motors, starters, fuses, electrical power to machine etc.) for industrial equipment and machines in order to support the achievement of Nelson-Miller’s business goals and objectives:

• Perform highly diversified duties to install and maintain electrical apparatus on production machines and any other facility equipment (Screen Print, Punch Press, Steel Rule Die, Automated Machines, Turret, Laser Cutting Machines, etc.).

• Provide electrical emergency/unscheduled diagnostics, repairs of production equipment during production and performs scheduled electrical maintenance repairs of production equipment during machine service.

In the visible light spectrum, blue light has wavelengths adjacent to ultraviolet light. Compared to the factory preset setting of 6500 K of typical LCD monitors, Paper Mode is closer to the spectral distribution with long reddish wavelengths so it reduces the amount of blue light, a cause of eye fatigue, and helps prevent eyestrain when reading documents. When used in conjunction with Auto EcoView dimming function, blue light can be reduced by as much as 80%.

Due to the way brightness is controlled on LED backlights, a small number of people perceive flicker on their screen which causes eye fatigue. FlexScan Frameless monitors utilize a hybrid solution to regulate brightness and make flicker unperceivable without any drawbacks like compromising color stability – even on low brightness settings.

The monitor uses an LED-backlit IPS (in-plane switching) LCD panel with 178° viewing angle that minimizes color shift and contrast changes when viewing the screen at an angle. This means that two people sitting at the one computer can easily see the screen with high image quality.

47% of U.S. consumers admitted to being unable to last a day without their mobile devices in a 2014 study done by the Bank of America, demonstrating the increasing prevalence of mobile devices. Mobile devices use LCD screens which emit blue light and thus negatively affects not only vision but also overall health. Continual extended screen time mainly can impact your eyes in two major ways.

Digital Eye StrainWhen we look at a screen, our blink rate drops significantly, thus causing digital eye strain. Signs of digital eye strain include slightly blurry vision after using LCD screens for prolonged periods, headaches, dry or tired eyes.

Though digital eye strain is temporary, if left unaddressed, it can turn into a chronic problem.The easiest way to address digital eye strain is to blink more as blinking helps to keep eyes lubricated. Alternatively, try using the “20-20-20 Rule”. Every 20 minutes, stare at something at least 20 feet away for at least 20 seconds. This exercise engages your distance vision and allows the eyes to rest.

Blue Light ExposureBlue light is the highest energy wavelength of visible light. This energy is able to penetrate all the way to the back of the eye, through the eyes’ natural filters. The rapidly increasing amount of blue light exposure that we get each day through digital device use is causing permanent damage to our eyes. The effects of blue light are cumulative and can lead to eye diseases like macular degeneration.

Children are especially at risk due to their developing eyes. Protective pigments which help filter out some of this harmful blue light are not yet present. The risk is worsened further due to their increased exposure to LCD screens.

Studies have also shown that exposure to blue light before bedtime actually suppresses melatonin secretion and delays deep REM sleep significantly. Your health is thus adversely affected. This may lead to reduced cognitive abilities and the development of chronic illnesses in the long run.

Try minimising usage of LCD screens by reading print media or using E Ink displays instead. The InkCase, for example, allows users to read for prolonged periods with minimal power consumption by adding a secondary E Ink screen on the back of your phone.

Scientists have developed a spherical LCD that"s suitable for embedding in contact lenses. A prototype of the miniature curved display unveiled today shows a dollar sign; its creators say this a nod to the "many cartoons that feature people or figures with dollars in their eyes." Despite how simple that symbol may seem, it perfectly demonstrates the advantages offered by LCD technology compared to LED-based contact lenses that have come before. Researchers at The Centre of Microsystems Technology in Belgium have engineered the display so that its entire surface area can be pixelated.

As of now the scope is fairly limited — it"s only capable of outputting "rudimentary" patterns similar to those you"d see on a pocket calculator. But future implications are far more promising than this initial prototype, and scientists are hopeful the LCD will be harnessed for medical purposes. For example, it could enable those with a damaged iris to limit the amount of light transmitted toward their retina. Cosmetic uses are also possible: someone with two different-colored eyes could potentially use such a lens to achieve uniformity. Researchers hope to see real-world applications within the next few years.

Unfortunately since the human eye simply can"t focus on anything that close, anything shown on the display would only be visible to bystanders and not the person wearing it. So if you were hoping for a futuristic HUD of some sort, you"ll need to keep waiting for Google Glass.

There is a constant debate on Amoled vs LCD, which is a better display? Where Amoled display offers some remarkable colors with deep black eye-soothing contrast ratio, LCD displays offer much more subtle colors with better off-axis angles for viewing & offers a much brighter picture quality.

While purchasing a new smartphone we consider various specifications like software, camera, processor, battery, display type etc. Among all the specifications display is something that most people are concerned about. 2 of the major competitors of smartphone display are AMOLED and LCD. Often in the LCD vs Amoled comparison, people get confused about which one to choose. In this article, we have explained a clear comparison of the Amoled vs LCD screen to find out which is actually better.

Amoled display is nothing but a part of OLED display which comes with some extra features. The first component is Light Emitting Diode (LED) and the second component is "O", here "O" stands for organic & together they make OLED. The real meaning derived from it is organic material placed with 2 conductors in every LED. And this is how light is produced.

The OLED display can generate light out of individual pixels. AMOLED displays contain Thin Film Translator (TLT) which makes the overall procedure of sourcing current to the correct pixel much quicker and smoother. The TXT further helps grab control for operating different pixels at a time. For example, some pixels could be absolutely switched off though others remain on in Amoled displays. This produces a deep black color.

Speaking about LCDs, it is relatively pretty much commonly found in today"s smartphones. LCD (Liquid Crystal Display) offers a devoted black light that is white or rather slightly blueish in color. Mostly here we get a blue light that is passed through some yellowish phosphor filter which brings out the white light. The white light is subsequently passed through multiple filters and thereafter the crystal elements are again passed through blue, red & green filters. Note that LCD displays have both passive and active matrix which depends on the cost and requirement involved.

Since the process involved in LCDs is much more complex than Amoled & requires extra steps, when compared to AMOLED displays, LCDs are less battery friendly. In the technological era where energy efficiency is the first priority, Amoled displays are certainly going to be the future of display technology. But both of them come with a separate set of pros and cons and it is only by knowing the pros and cons you will be able to choose the right one.

Amoled display technology is mostly used in smartphones, media players & digital cameras. Amoled is mostly used in low power, cost-effective & large application sizes.

Cost is one of the major factors that act as a differentiator between the two display types. Amoled displays are comparatively more expensive than LCD displays because LCD displays are much cheaper to manufacture. So while buying a low-budget smartphone, the probability to get a Amoled display is pretty less.

The quality of a display is mainly measured according to the colors and sharpness it offers. Also while comparing two displays, only technology comparison won"t work because often displays behave inversely even if a manufacturer is using the very same technology. If you consider colors especially contrasting colors such as blue, red or green, Amoled will serve better throughout the day. This happens mainly because in the case of AMOLED displays, as mentioned above, every pixel present in it emit its own light whereas in LCD light comes out of the backlight. Therefore Amoled displays offer high-end saturation and vibrant colors compared to LCD displays.

As Amoled displays put out vibrant colors, you will find Amoled displays to be warmer in nature compared to LCD displays which has a more neutral whitish tint. In short, the pictures seen on Amoled displays are more eye-soothing compared to LCD displays where the pictures appear more natural.

In the Amoled vs LCD screen display comparison, another thing to consider is the brightness offered by both of them. Compared to LCD displays, Amoled displays have lesser brightness levels. This is mainly because of the backlight in LCD displays which emits a higher brightness level. Therefore if you are a person who spends most of the time outdoors and mostly uses your smartphone under the sun, then LCD is the right choice for you. Although certain leading brands are working on the brightness level in Amoled displays.

The display is one such thing that sucks your phone"s battery to a great extent. In Amoled displays, the pixels can get absolutely switched off thereby saving a lot of battery. Whereas LCD displays remain dependent on the back light, as a result even if your screen is completely black, the backlight remain switched on throughout. This is why even though Amoled displays are more expensive than LCD displays as they consume much less battery than LCD displays.

In the battle between LCD display vs Amoled display both come with separate pros and cons. Well if battery consumption and color contrast or saturation is a concern then the Amoled display is going to win over LCD display anyway. While purchasing a smartphone, customers today mainly focus on two features- lesser battery consumption and a high-quality display. Amoled display offers both the benefits- high-end vibrant display and less battery consumption. The only criteria where LCD displays win over Amoled is the brightness level. But with brands coming with the latest technologies, Amoled is certainly going to catch up with the brightness level with LCD displays. Also, the brightness difference in current Amoled display smartphones that are available in the market is hardly noticeable.

Both screens are made up of Pixels. A pixel is made up of 3 sections called sub-pixels. The three sections are red, green and blue (primary colors for display tech).

The light is generated from a “backlight”. A series of thin films, transparent mirrors and an array of white LED Lights that shine and distribute light across the back of the display.

On some lower quality LCD screens, you can see bright spots in the middle or on the perimeters of screens. This is caused by uneven light distribution. The downside to using backlights, is that black is never true black, because no matter what, light has to be coming through, so it will never have as dark of a screen as an AMOLED screen. Its comparable to being able to slow a car down to 2 mph versus coming to a complete stop.

Each pixel is its own light source, meaning that no backlight is necessary. This allows the screen assembly to be thinner, and have more consistent lighting across the whole display.

In addition, since each pixel is an OLED (Organic Light Emitting Diode) or individual light, showing black means it shuts off pixels it doesn’t need to generate color.

So on the Samsung Galaxy S lineup of phones, the notification lock screen, which is white text on a black background, uses barely any power, because 90% of the screen is actually powered off.

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 vision is perhaps the most valuable tool at our disposal. While we learn about the world through its various sounds, smells, tastes, and textures, it is our sight that feeds the most information to our brains. Because of this, protecting our vision is one of the most important things we can do for our overall health. That"s easier said than done in the modern world.

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.

Screen size affects pixel density. Related to point #2 is screen size. Obviously, a smaller laptop screen will subsequently be harder to see from a normal viewing distance than a larger laptop screen. That being said, a larger laptop screen will have a smaller pixel density than a smaller screen of the same resolution. For reference, a 15.6-inch display with a resolution of 1920x1080 has a pixel density of 141 pixels per inch (PPI). Choose a laptop with a screen large enough for comfortable viewing from your desk chair. A larger screen would need a higher resolution to match this pixel density. It should be noted that Apple"s "Retina Display" moniker is a classification used by the company to describe a pixel density high enough such that individual pixels are not visible at a normal viewing distance. The iPhone 4 had the first "Retina Display" with a PPI of 326. Apple"s Retina MacBook Pros typically have a lower pixel density (~220 PPI) but are viewed from farther away than a smartphone.

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.

Check the underlying display technology. The manufacturing process behind a display can heavily impact its quality. Twisted nematic (TN) panels are typically cheaper and offer faster response times but suffer from poor color accuracy, low contrast, and off-angle color shift/inversion. Panels that use in-plane switching (IPS) remedy these issues at the cost of slower response times. IPS panels are commonly found in most TVs and smartphones and are widely available in mid-range and high-end laptops. There are other display technologies, such as IGZO and OLED (Organic LED) that have their own advantages and disadvantages, but these are rare in the laptop world. For example, Aorus is one of the only laptop manufacturers that regularly uses IGZO displays, and one of the only laptops with an OLED display is the now-retired 2017 Alienware 13. It should be noted that IPS displays are significantly more expensive than TN panels, but the benefits may be worth the extra cost.

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.

There"s a reason why Apple"s MacBook Pro devices are often praised for their displays. The panel on the MacBook Pro 15, in particular, is one of the brightest screens in the industry (~520 nits). The pixel-dense (~220 PPI), color-accurate screen has an excellent contrast ratio (1333:1). The device"s "Retina" display can be set to a wide variety of brightness levels for almost any lighting situation and has almost imperceptible PWM (>20,000 Hz). The one flaw in the display is its glossy finish. While the backlight gets bright enough to help reduce reflections in most lighting conditions, bright days outdoors turn the screen into a mirror, which can be highly distracting and fatiguing. If you rarely or never work outdoors or under bright lights, though, the MacBook Pro 15 should offer easy viewing.

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.

I"ve been a computer geek my entire life. After graduating college with a degree in Mathematics, I worked in finance and banking a few years before taking a job as a database administrator. I started working with Notebookcheck in October of 2016 and have enjoyed writing news and reviews. I"ve also written for other outlets including UltrabookReview and GeeksWorldWide, focusing on consumer guidance and video gaming. My areas of interest include the business side of technology, retro gaming, Linux, and innovative gadgets. When I"m not writing on electronics or tinkering with a device, I"m either outside with my family, enjoying a decade-old video game, or playing drums or piano.

The television is one of the most common electronic in any household. Even in the age of digital media, people choose to spend their free time at home with their families watching television.

Some people are hooked to watching show after show, putting their eyes at risk. But screen type is not the only factor in eye-healthy screen time. It really depends on the TV brightness, room lighting, distance from the screen, and view time. How? Let’s break it down:

Whatever type of television you have, it emits light with most TVs emitting at least 50% of blue light. Because blue light is closer to UV rays on the light spectrum, it may have similar qualities to how it affects people. Blue light exposure has long been linked to health issues such as eye damage, vision loss, and insomnia. So, as the brightness of your TV is increases, the color, and contrast of the image decrease, causing eye strain.

Ambient lighting should be present in the room when watching TV. It’s not a good idea to watch TV in complete darkness -- yes we’re talking to you late-night viewers. The room’s brightness should be adequate and comparable to the television. Even in theaters, the lights are never completely off, just dimmed; that same rule should apply to your home.

The closer you go to the television, the more your eyes begin to strain. For both kids and adults, it is not necessary nor healthy to sit close to the screen. The basic rule is to sit at least five times as far away from the screen as it is wide. So, if your television is 32 inches wide, for example, the ideal viewing distance is 160 inches or around 13 feet.

The recommended viewing distance for televisions with 4K resolution is one and a half times the screen size. The recommended distance for HDTVs is three times the screen size of the TV. These guidelines also go for children, who may be the biggest culprits in non-safe viewing practices. If you must, rearrange your living room to space out the good seats away from the TV.

How does that translate into TV screen types? And what screen type should people use to better protect their eyes when watching various shows on television?

The most common display technologies are LED and LCD. The latest TV display technology is OLED, which is only available on high-end TVs. The pixels used to provide the display are the difference between LCD, LED, and OLED. When compared to LED backlight, OLED has a far higher resolution and delivers cleaner, better graphics.

An OLED (Organic Light-Emitting Diodes) screen consists of numerous pixels that emit its own light. Each pixel is made up of three separate RBG – red, blue, and green – OLEDs. OLEDs are true emissive components that produce light on their own and do not require a light source. Meaning they produce a light that’s more natural and less harsh on your eyes.

OLED TVs also provide excellent color and contrast because they do not use light from other sources to display colors, as LCD/LED TVs do. They also, on average, produce around 20% less blue light than LCD displays.

Both LCD and LED TVs work in similar ways to each other. The only difference between the two is the type of backlighting. A TV labeled as an LED utilizes LED illumination for the white backlighting instead of fluorescent (CFL) lamps.

While LED LCD TVs are more appealing than CFL LCDs, they cannot compete with OLED panels since the LCD/LED front panel is a liquid color display that is not self-emissive. Which is the biggest disadvantage of LCD/LEDs in terms of eyesight. Although they produce quality images, the color and contrast from these displays are due to their light sources, so they give off more brightness that can cause eye strain if not moderated.

To sum it up, OLED displays are better for your eyesight. They have more natural lighting, better color contrast, and a wider color range. However, no matter what type of display you have, you will hurt your eyesight if you don’t practice safe TV viewing.

There are endless technical arguments for determining which screens are the best, but if you set price aside, the deciding factor usually comes down to which screen produces the best visuals — the most accurate depiction of the world as we see it with our own eyes.

Leading screen manufacturers like Samsung have turned to nanotechnology that, ironically, can’t even be seen by the naked eye but produces jaw-droppingly rich, vibrant displays. An emerging technology called Quantum Dot enhances flat-panel LED displays, commercial TVs and curved widescreen monitors, revealing many more colors and adding the necessary brightness to take full advantage of technologies like High Dynamic Range (HDR).

Quantum Dots are essentially nanoparticles that manufacturers add to the layers of films, filters, glass and electronics — sometimes called the sandwich — that comprise a Liquid Crystal Display (LCD). When these Quantum Dots are illuminated, they re-emit light of a certain color. Developing the technology for the primary QLED colors (red, blue and green) has been a technological feat, and one Samsung has overcome with its R&D hub Samsung Advanced Institute of Technology (SAIT). The team successfully developed blue QLED technology in 2020.

Because of its investment in R&D, Samsung is, by far, the market leader in Quantum Dots development and display products, with a category it calls Quantum LED (QLED). Other display manufacturers using Quantum Dots technology often include “Q” or “Quantum” in product names to make the distinction from conventional LCDs.

Quantum Dots-enhanced displays compare favorably with super-premium Organic LED displays (OLEDs), but usually at less cost, and with none of the technical issues and limitations that OLED introduces (more on that later). Quantum Dots technology first found its way into the premium TV market, and is now increasingly being used by image-sensitive brands for commercial applications such as digital signage, where the depth and accuracy of color is critically important.

What is Quantum Dot technology? A Quantum Dot is a human-made nanoparticle that has semiconductor properties. They’re tiny, ranging in size from two to 10 nanometers, with the size of the particle dictating the wavelength of light it emits, and therefore the color. When Quantum Dots are hit with a light source, each dot emits a color of a specific bandwidth: Larger dots emit light that is skewed toward red, and progressively smaller dots emit light that is skewed more toward green.

Quantum Dots are usually applied to a sheet of film that sits as a layer in that “sandwich” in front of the LED backlight that’s used to illuminate an LCD. The light passes through the LCD display stack, with the Quantum Dot color filter layer enhancing and enabling the LCD to reveal a wider and more saturated range of colors than would otherwise be possible.

Many consumer and B2B brands place heavy importance on how their products look to the marketplace. Their brands’ colors are not just blue and red — they are very specific blues and reds. Brand owners often have rigorous guidelines that mandate how these colors are reproduced, and in the case of digital displays, Quantum Dots technology provides the level of accuracy they want. Samsung’s QLED displays, for example, enable more than a billion colors.

By one estimate, Quantum Dots increase the color gamut on LCD displays by up to 50 percent. That broad range of colors also enables more saturated colors — the vivid, intense color levels that “pop” on screens and draw viewer attention.

Using Quantum Dots means the range of colors and their accuracy is maintained even at peak brightness, while other display technologies like OLED might wash out colors when scenes require full brightness. The result with QLED is accurate, rich and detailed colors on displays, in any light.

Quantum Dots LCD displays are often compared to OLED flat panel displays, with both billed as premium visual experiences. To a casual observer, they can look very similar, but there are distinct differences.

In pure technical terms, they’re different in that LCDs are illuminated by integrated but distinct LED lighting arrays, whereas OLEDs are self-emissive — each pixel is its own light.

Both technologies offer a huge range of colors, delivering eye-popping visuals. But while Quantum Dots can reproduce that full range of colors even at peak brightness, when the image on an OLED display becomes too bright, its color capabilities are compromised, and diminishing the available spectrum. Samsung QLEDs have peak brightness levels as high as 4,000 nits, which is brighter than what’s needed for outdoor displays to overpower the glare of direct sunlight.

While a QLED will provide consistent color expression throughout its operating life, the organic material driving an OLED will fade (in technical terms, lose that color expression) as it ages. OLEDs — particularly running at high brightness — are also more susceptible to burn-in, or ghosts of images or text left when a screen element (such as a logo) stays up for too long.

When flat panel displays first came into the marketplace, much of the marketing story and buyer interest focused on their shape and scale. Then the focus turned to resolution, shifting from 720p to 1080p HD and then to 4K and even 8K.

Size and pixel counts are important, but in many respects the real determining factors for brands and business users is visual quality. The real benefits of Full HD, Ultra HD and beyond come when a display can deliver that volume of detail with an exceptional depth of color, no matter the visuals. Samsung’s QLED technology is supported by AI-powered machine learning, which can scale 4K UHD and Full HD content to 8K resolution without compromising quality.

Quantum Dots may seem like a term that could only excite nerds, but one look at a QLED display will generate admiration even from people who don’t want to know all the technical details.

Explore Samsung’s full lineup ofQLED displays, designed deliver realistic detail and vibrant color to showcase your business in the best light. Looking for more buying advice? You can find everything you need to know about choosing your LED displays for optimal viewing indoors and out in thisfree, comprehensive guide.

I do not understand so much hatred for the LCD displays, they are great as they are, most competent gaming monitors are IPS for a reason, also people here is quite badly informed about how are current AMOLED displays ( or oled ).

OLED displays or AMOLED currently offer lower efective resolution than its LCD counterpart, let"s say a 1080p LCD is going to look a tad sharper than a 2k AMOLED, why? Easy, usually this screens have PenTile so there are only two subpixels per pixel, and almost all of them use this arrangement.

So hence lower effective resolution and vision artifacts, yea the blacks are not as black but the fidelity of color, smoothness and all the rest there is no better than IPS at doing that, also you can let LCD almost 24h no issues, try that on oled, after 5 hours is going to be seriously burned, also you do not suffer eye strain due to no power modulation of the brightness ( important for sensitive people like me ), also blue light on amoled, due to the pixels lacking are mostly red and green, and blue is the more prominent ( last longer ) then you get your eyes more damaged.

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, calculators, and mobile telephones, including smartphones. LCD screens have replaced heavy, bulky and less energy-efficient cathode-ray tube (CRT) displays in nearly all applications. The phosphors used in CRTs make them vulnerable to 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 do not have this weakness, but are still susceptible to image persistence.

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 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.

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 inter