blue spot on lcd screen free sample

That annoying dead pixel on your TFT, OLED, or LCD screen might just be stuck and easy to fix. We"ll show you how to do it. You can still return your monitor if this doesn"t work; nothing we recommend here will void your warranty.

Yes, you should test any new monitor for bad pixels. You can simply run your screen through a palette of basic colors, as well as black and white in full-screen mode using a tool like EIZO Monitor Test.

EIZO Monitor Test is an online tool that lets you find and eventually fix stuck pixels. It packs many options into a single test window, but it"s easy to use once you have an overview.

To test your screen, check all the boxes you want to include in your test. We recommend the default setting of having all boxes checked. If you"re testing multiple monitors, you can open the test on an additional monitor. When you"re ready, click Start test to launch the full-screen test window.

Below you see the first test pattern. Each screen has an explainer in the bottom right detailing what you should look for. Next, you"ll see a menu that lets you go from one test to the next on the left. Move through the black and white screens and all the solid colors (green, blue, and red) and check our screen. To exit, press the ESC key or the exit symbol in the top right.

This is a very thorough test not only meant to identify bad pixels but also powerful enough to test the quality of your monitor. Unfortunately, with Flash no longer supported by most browsers, you"ll probably have to use the executable version to make it work.

Move the mouse to the top of the test window, and a menu will appear. There is an info window that you can turn off with a button in the top right corner of the menu. Then click on the Homogenuity test point and move through the three colors as well as black and white.

Fingers crossed, you won"t discover anything out of the ordinary. In the unfortunate case that you do, let"s see whether it"s a stuck or a dead pixel and what you can do about it.

A stuck pixel, sometimes wrongfully referred to as a hot pixel, is defective because it receives incomplete information. Hence, it appears in one of the colors that its three sub-pixels can form, i.e., red, green, or blue. Strictly speaking, hot pixels only appear in digital cameras when electrical charges leak into the camera"s sensor wells. Sometimes, stuck pixels fix themselves.

The tool will load a black browser window with a square of flashing pixels. Press the green button in the bottom right to go full-screen. Drag the flashing square to where you found the stuck pixel and leave it there for at least 10 minutes.

UDPixel, also known as UndeadPixel, is a Windows tool. It can help you identify and fix pixels using a single tool. The program requires the Microsoft .NET Framework. If you"re not on Windows or don"t want to install any software, scroll down for the online tools below.

Should you spot a suspicious pixel, switch to the Undead pixel side of things, create sufficient amounts of flash windows (one per stuck pixel), and hit Start. You can drag the tiny flashing windows to where you found odd pixels.

The PixelHealer lets you flash a combination of black, white, all basic colors, and a custom color in a draggable window with customizable size. You can even change the flashing interval and set a timer to close the app automatically.

Let it run through all colors in Auto mode to spot whether you have any weird pixels on your screen. If you do, start the fix, which will rapidly flash your entire screen with black, white, and basic color pixels.

Should none of these tools resolve your stuck or dead pixel issue, here is one last chance. You can combine any of the tools detailed above and the magic power of your own hands. There is a very good description of all available techniques on wikiHow. Another great step-by-step guide can be found on Instructables.

This works because, in a stuck pixel, the liquid in one or more of its sub-pixels has not spread equally. When your screen"s backlight turns on, different amounts of liquid pass through the pixel to create different colors. When you apply pressure, you"re forcing the liquid out, and when you release the pressure, chances are the liquid will push in, spreading around evenly as it should.

When all attempts to revive your bad pixel fail, the next best thing you can do is to make peace with it. One ugly pixel won"t break your screen, and eventually, you"ll forget about it. If the defect affects more than a single pixel, however, or just bothers you a lot, you can always replace your monitor.

First, check the warranty. The manufacturer or the marketplace where you purchased the monitor might cover dead pixels. Note that most manufacturers define a maximum number of allowable bad pixels for specific resolutions, and the warranty won"t apply until your monitor crosses that threshold.

Bright or dark sub-pixels can occur during the production of the LCD Monitor panel but does not affect the LCD Monitor functionality. The customer may notice the bright or dark spots if the film of the liquid crystal does not perform as expected while customers uses the LCD monitor. However, this is not considered a defect unless the number of bright and dark subpixels exceeds the maximum allowable threshold (...)

On a monitor with over 12 million pixels (Wide QXGA+, 2560x1600 pixels), for example, LG"s pixel policy says that 12 bright or dark sub-pixels is the maximum you have to tolerate.

Should all of these approaches fail to fix your dead pixel warrior, at least you"ll now know it"s not simple to fix, and, you might actually have to replace the screen.

Have you ever left your TV or monitor on for days, stuck on the same image? You return to your screen, only to find an image burned into the display. No matter what you do, it won"t go away. It is a permanent image burn.

Why do monitors and TVs get image burn? Why can"t manufacturers prevent LCDs and plasma screens from a burnt image imprint? Moreover, what can you do to fix an image burn?

In some cases, you can minimize the image burn effect. In others, you can remove the image burn completely, so long as it hasn"t been burning too long.

Before flat-screens and crystal displays, most TVs and monitors featured CRT (Cathode Ray Tube) technology. In CRTs, individual pixels comprise a red, blue, and green phosphor component. Depending on the intensity of each phosphor component, the pixel appears to the human eye as a unique color.

When a particular still image remains for too long, the intensity of each phosphor component diminishes at an uneven rate. The result is a ghost image on the screen, which is known as image burning.

Plasma displays use plasma, a gaseous substance containing free-flowing ions. When the plasma is not in use, the particles in the plasma are uncharged and display nothing. With the introduction of an electric current, the ions become charged and begin colliding, releasing photons of light.

This is a very simplified version of how a plasma screen works. However, the main thing to understand is that plasma screens use phosphor material (like CRTs) to turn those photons into images.

LCD and LED do not work in the same way as CRTs, either. LCD and LED screens use backlit liquid crystals to display colors. Although manufacturers market screens using LED and LCD, an LED screen is still a type of LCD. The white backlight filters through the liquid crystals, which extract particular colors per pixel.

LCD and LED displays don"t suffer from the same type of image burn as CRTs and plasma screens. They"re not completely clear, though. LCD and LED screens suffer from image persistence. Read on to find out more about image persistence.

Before you can fix screen burn-in, take a second to understand why these images burn in the first place. LCDs and LEDs don"t suffer from burn-in as seriously as plasma screens. But static images can leave an imprint on both display types if left alone for too long. So, why does image burn happen?

First, let"s tackle plasma screen burn-in. Remember why CRTs experience image burn? When a still image remains on the screen for too long, the phosphor components in each pixel wear out at different rates. The uneven burn rates leave behind a ghost image, forever etched into the screen.

Plasma screens also suffer from phosphor deterioration. Plasma burning occurs when pixels on the screen are damaged through long exposure. The phosphor loses its intensity and only shows the light it was fed repeatedly. In this case, the still image, which causes the burn.

LCD and LED screens can also experience image burn, though the image burn process can take longer to develop into a permanent issue. In addition, LCD and LED screens suffer from another issue, known as image retention (also known as image persistence or an LCD shadow).

Image retention is a temporary issue that you are more likely to notice before it becomes a permanent issue. However, proper image burn can still affect LCD, LED, and OLED screens.

Image retention is a different issue from image burn (although it is a precursor to image burn). For example, you"re using an image of a steam train as a reference point for a drawing. You have the steam train image on your screen for a few hours before you decide to play a video game instead.

When you load up the video game on the screen, you can still see the faint outline of the steam train on the screen. The steam train image will remain for a short while, but the movement and color changes of the video game (or film, TV show, or other media type) should erase the retained image.

The other thing to consider is that LED and OLED image burn-in, when it happens, is irreversible. That"s because of how LED and OLED screens work. Individual pixels within an LED display decay when they emit light.

Under normal use, an LED, OLED, or QLED screen won"t suffer image burn. However, if you leave your screen on a single channel for hours every day, then burn-in can become an issue, as it would with almost any screen.

Issues arise when a screen shows a single news channel 24 hours a day, every day, causing channel logos to burn-in, along with the outline of the scrolling news ticker and so on. News channels are a well-known source of television burn-in, no matter the screen type.

Image burn-in fixes exist for LCD and plasma screens. How effective an image burn-in fix is depends on the screen damage. Depending on the length and severity of the image burn, some displays may have permanent damage.

The best fix for screen burn is to prevent it in the first place. Okay, that isn"t super useful if your screen is already experiencing image burn. However, you should always try not to leave your screen on a still image for too long. The time it takes for an image to burn-in varies from screen to screen, between manufacturers, sizes, and panel type.

My personal rule of thumb is to turn off the display if I plan on being away for more than 15 minutes. That way, it is difficult to get caught out, plus you save yourself money on electricity costs and monitor or TV wear and tear.

Another prevention method is to reduce screen contrast as much as you can. Unfortunately, most screens aren"t calibrated correctly, often pushing the contrast and brightness settings too high.

Lower contrast means the lighting across your screen is more even. This means less strain on specific areas of the screen, which helps protect against image burning.

If your plasma or LCD screen already has image burn-in, you can try turning on white static for 12 to 24 hours. The constant moving of white-and-black across your screen in random patterns can help remove the ghost image from your screen.

Unfortunately, this won"t work for extreme cases. Some TVs will have a built-in pattern swiping option that basically accomplishes the same thing (filling your screen with random patterns).

Pixel-shift constantly slightly adjusts the image on your screen, which varies the pixel usage to counteract image burn. You might have to enable a pixel or screen shift option in your screen settings. Pixel-shift is a handy feature for LED and OLED screens that cannot recover from image burn and should help counteract an LCD shadow.

Other modern screens feature built-in screen refresh functions that the manufacturer will advise using to remove image retention and image burn issues.

The best tool for fixing ghost images is JScreenFix. The original program helps fix monitors with dead pixels, but the same company also released an "advanced" version of the tool, known as JScreenFix Deluxe.

While the Deluxe version uses advanced algorithms to repair burned screens and prolong plasma and LCD longevity, the official site is no longer up and running, and there is no way to download the full version officially.

You can find the free version of the Deluxe app online, but it is limited to 20 minutes running at a time. Furthermore, we"re not going to link out to the versions you can find online as we cannot verify the security of these installations. If you do use the Deluxe version, you do so at your own risk.

Another option is to set a completely white desktop background and leaving to run for a few hours. The solid color might reset the image burn. A solid color background is more likely to help with image persistence than image burn, but it is still worth trying.

If you have television burn-in, you can attach a laptop to your TV using an HDMI cable, extend your desktop to the television, and share the white screensaver. Hopefully, that will shift your television burn-in.

The team over at ScreenBurnFixer offers a few different ways you can attempt to fix screen burn on your TV or monitor. As with any other screen burn-in fixes, their chance of working depends on the scale of the issue.

You can head to the ScreenBurnFixer Video page and find a video that matches your screen type, then let the video play for as long as possible (we"re talking multiple hours, not a quick half an hour blast). Alternatively, head to the Chart page and find your device or a device that matches your specifications.

There are several ways you can attempt to fix screen burn-in. The results will vary between the screen type and the level of burn-in. A screen with extensive image burn may not clear entirely, although you might see an improvement.

Some screen degradation over time is understandable. However, if you follow the steps in this guide, you"ll protect your screen from image burn before it becomes a permanent issue.

An Arduino Uno shield-style display module which comprises a graphic LCD mounted on a carrier board. This module is specifically designed to simply presses onto a controller with the Arduino Uno form factor, making it easy to begin designing with this display.

If the hole is only in a thin surface film, you might be able to press it flat, but if the film has been distorted (stretched), it probably won"t stay flat. You might find that over time, the film may flatten a little on its own. I would not try to soften it with heat because some plastics will shrink and shrivel, making it worse and eliminating any chance for improvement.

In terms of filling the hole, that is also likely to make it worse and if not, probably won"t improve it. It also depends on the purpose of the surface film and the cause of the bright spot. If it is an anti-glare film,the bright spot may be the next layer. Anything that is not anti-glare film will be a similarly non-diffusing surface. If the filler doesn"t have the same refractive index as the next layer, it may create cloudiness or distortion that will also be noticeable.

Similarly, trying to glue down the surface film may wick under the film and mess up a large area. If you use an adhesive that doesn"t wick, you would need a way to compress the film flat until it cures to avoid a permanent bump. Material thick enough not to wick is likely to leave a raised area. The screen sandwich is manufactured using tightly stretched sheets of material that are compressed together and bonded under pressure. It is not a condition you can reproduce to repair a spot.

There isn"t a practical way to actually repair it, but can you make it less noticeable? A number of people responded with ideas based on the principle that a dark spot may be less noticeable than a bright spot. You could potentially make it a little less noticeable, but it"s a question of how much improvement can you achieve and at what risk.

No matter what you do, it will still be noticeable. Maybe a darker spot won"t bother you as much if you get it right. But there is a good chance of achieving little or no net improvement, and a substantial risk of making the situation worse in a non-fixable way.

Don"t count on a redo or cleanup, because cleaning fluids, including any dissolved materials, can wick under the film, and rubbing is likely to make the hole bigger. So if you don"t get it as good as you"re going to get it on the first try, you have a good chance of making the problem permanently worse.

Now that you"ve been forewarned, if you are determined to try this, here"s an approach I would try if it was a last resort (disclaimer, I"ve never tested it, but it seems like the least risky alternative). Practice the procedure first on something else to get the feel for how things behave and how much working time you have. Work with a magnifier and good light so you can see what you"re doing. Do the procedure with the screen lying face up and level.

Use a very viscous sticky material with temporary adhesion, like rubber cement for paper. Use an extremely fine-tipped brush, or be extremely gentle with a toothpick, to apply a thin layer to the hole, being careful not to get it anywhere else (not getting it anywhere else is more important than perfectly filling the hole).

While it is still tacky, dust on some dry powdered graphite using a pinpoint applicator (sold in hardware stores as a lock lubricant). Use a soft brush and blowing, while protecting the hole, to remove any graphite that lands outside the hole (you can clean the rest of the screen as you normally would, just be careful to avoid the hole). If you"ve made the problem worse, you may be able to carefully peel this filler off when it dries.

If the hole bothers you so much that you are ready to replace the screen or buy a new monitor, you don"t have much to lose by attempting these measures (other than possibly not having the monitor as a backup in the latter case). Otherwise, consider whether the risks outweigh the minor potential improvement.

Unfortunately, this is one of those problems where the best solution may be to change how you view the problem. You"re aware of the hole, which serves as a constant reminder. Instead of letting the hole bother you, think about how much money you will save by simply living with it. Every time your eye is drawn to it, remind yourself of the savings from not buying a replacement monitor. :-)

Your monitor is made up of millions of pixels. Each pixel is a group of red, green and blue subpixels that combine to create the images you see on your computer screen. When a few are dead or stuck, it can be super distracting.

If you’re having trouble identifying them, though, we’ll show you some tools to use, then tips for ridding your monitor of these tiny little eyesores.

A dead pixel occurs when an entire pixel or a group of subpixels remain dark even when they’re supposed to be on. Since this implies that the pixel or group of subpixels are no longer powering on, they’re harder to fix than stuck pixels. In most cases, dead pixels are lost forever.

A stuck pixel occurs when one or two of the color subpixels remain activated even when they’re supposed to be off. For example, the blue subpixel might get stuck, so the entire pixel will display a different color than what is intended.

To see what’s going on, you can enlist software to help. Try a third-party download like InjuredPixels for Windows. If you’re on a Mac or don’t want to download anything, go with a browser-based solution like LCD DeadPixel Test.

Most monitor manufacturers have a return policy for dead and stuck pixels. They’ll usually replace a monitor if it has more than several pixels stuck in a single color or brightness setting. Since dead pixels are difficult to fix, replacing your monitor via the manufacturer’s warranty is your best route.

You can go the web browser application route with a site called JScreenFix. The free service claims to fix most stuck pixels within 10 minutes by using an HTML5 “PixelFixer” tool.

And since it’s HTML5 and JavaScript-based, there’s nothing to install. All you have to do is bring up the website, drag the PixelFixer window over the stuck pixel area then leave it on for at least 10 minutes.

After detecting your monitor’s stuck or dead pixels, use PixelHealer’s flashing color box on the affected areas to try and jolt the pixels back into shape. The site claims that the tool uses the already proven method of using flashing RGB colors to restore a stuck pixel or even revive a dead one.

If your monitor is out of warranty and none of the pixel fixing software methods are working for you, you have two choices. Either you learn to live with a few stuck or dead pixels here and there, or, if you’re brave enough, there’s a last-ditch method you can attempt.

First, take note of the location of the stuck or dead pixel. Then turn off your monitor and try applying gentle pressure on the affected area to “massage” it back to life. Use something with a narrow but flat edge like a pencil eraser or a pen cap. To avoid damaging your screen, wrap it with a soft, damp microfiber cloth.

The idea is that by applying gentle force, you might coax the pixel back into its proper alignment. If not done correctly, this method can actually create more dead pixels, and extreme caution is required.

Many Apple products use liquid crystal displays (LCD). LCD technology uses rows and columns of addressable points (pixels) that render text and images on the screen. Each pixel has three separate subpixels—red, green and blue—that allow an image to render in full color. Each subpixel has a corresponding transistor responsible for turning that subpixel on and off.

Depending on the display size, there can be thousands or millions of subpixels on the LCD panel. For example, the LCD panel used in the iMac (Retina 5K, 27-inch, 2019) has a display resolution of 5120 x 2880, which means there are over 14.7 million pixels. Each pixel is made up of a red, a green, and a blue subpixel, resulting in over 44 million individual picture elements on the 27-inch display. Occasionally, a transistor may not work perfectly, which results in the affected subpixel remaining off (dark) or on (bright). With the millions of subpixels on a display, it is possible to have a low number of such transistors on an LCD. In some cases a small piece of dust or other foreign material may appear to be a pixel anomaly. Apple strives to use the highest quality LCD panels in its products, however pixel anomalies can occur in a small percentage of panels.

In many cases pixel anomalies are caused by a piece of foreign material that is trapped somewhere in the display or on the front surface of the glass panel. Foreign material is typically irregular in shape and is usually most noticeable when viewed against a white background. Foreign material that is on the front surface of the glass panel can be easily removed using a lint free cloth. Foreign material that is trapped within the screen must be removed by an Apple Authorized Service Provider or Apple Retail Store.

If you are concerned about pixel anomalies on your display, take your Apple product in for closer examination at an Apple Store, Apple Authorized Service Provider, or an Independent Repair Provider. There may be a charge for the evaluation. Genuine Apple parts are also available for out-of-warranty repairs through Self Service Repair.*

Knowing how to fix dead pixels is a good skill to know. If you’ve noticed unusual spots on your display, you might be dealing with stuck or dead pixels. Fortunately, these pixels are usually harmless and can be detected using special pixel tests.

Dead and stuck pixels can appear on LCD screens of all kinds. This includes monitors, phones, and camera displays. It’s easier to spot them on larger displays, though.

If you’re using a camera, carefully look at your LCD display as you take photos. Are there any spots that stay in the same place no matter how much you move your camera? Those spots are dead or stuck pixels.

There’s a distinct difference between stuck and dead pixels. If you’re completely sure that the pixels on your screen aren’t dust, you need to identify them.

Stuck pixels are usually red, green, blue, or yellow. Dead pixels are black. No matter how much your screen changes, those pixels will remain fixed in one spot and won’t change their color.

Keep in mind that stuck pixels can also be black or very dark in color. You might accidentally mistake them for dead pixels. To make sure that they’re not dead, you need to use a dead pixel test. More on this later.

Stuck pixels are much easier to remove than dead pixels. If you’re sure that there’s a dead pixel on your screen, you’ll probably have to hire a specialist or replace your display.

Here are a few simple websites that let you check for dead pixels using solid colors. They basically do the same thing, but one of them might be more compatible with your device/browser than the other.

You need to be in full-screen mode. Make sure you wipe your screen beforehand so that you don’t accidentally mistake a speck of dust for a dead pixel!

Click on each color. If you don’t notice any unusual spots (black or any other color) on your screen, it’s likely that you don’t have an issue with dead or stuck pixels.

Some users recommend rubbing a dead pixel using a cloth to get rid of it. This might work temporarily, but it will damage your display in the long run.

Too much rubbing can damage even more pixels on your screen and lead to serious problems. If none of the solutions work, the best way out is to contact a specialist.

As mentioned previously, dead pixels are usually impossible to remove without professional help. However, you need to make sure that those dead pixels aren’t secretly stuck pixels or simply dust particles.

This is a very simple and seemingly straightforward method. But it might be the best solution to your problem. If your screen appears glitchy, it might simply need to be refreshed.

Use a screen-cleaning spray and a cloth to wipe your display. Make sure you don’t apply too much pressure or else you might damage your screen. A few gentle swipes might get rid of the problem.

If the options above don’t work, JScreenFix might be your best solution. This is a website that anyone can use for free. You don’t need to download any programs or extensions to use it. Best of all, it promises to remove stuck pixels in less than 10 minutes.

What JScreenFix does is fix stuck pixels. If you think you have a dead pixel, you can try this method as well. For this to work effectively, you need to know where exactly your stuck pixels are located.

Your job is to find the stuck pixel and drag the box to it. Leave it there for a few minutes. This should get rid of any unusual pixels on your display.

If you’re sure that the pixel is dead (and not stuck), then you’ll need to see a specialist. There are a few methods for fixing dead pixels, but most of them don’t seem to work effectively.

Dead pixels usually don’t spread. They’re usually a small fault in a display. If they do spread, you might need to hire a specialist or replace your screen.

Make sure you clean your display, take a dead pixel test, and use JScreenFix to get rid of the pixels. It’s likely that this will fix the problem and prevent you from consulting a specialist.

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.

Flicker-free monitors are specially designed to produce a single continuous light source. A typical monitor adjusts its brightness through flickering, introducing periods of low light between higher brightness. While a user may not be aware of the flicker, it can cause a number of issues, including eye strain. However, many monitors now use flicker-free technology to put less strain on monitor users’ eyes.

Look around your typical office and what do you see? Perched on every desk is a computer. Your reliance on computers in the workplace means that office workers are exposed to computer monitors every day, and many of them use the monitor for the majority of their work tasks.

Research shows that the average American worker uses a computer for up to 7 hours a day for work, recreation, or both. Most of us have never realized the degree to which we’re regularly exposed to digital displays. That exposure takes a toll on the health of your eyes, as well as your overall health, over prolonged periods.

Unfortunately, continued exposure to computer monitors can be very harmful to your eyes, causing irritation and discomfort in the short term. It may also lead to more severe issues in the long-term.

Since your screen-centric lifestyles aren’t likely to change anytime soon, it’s vital for us to take proactive preventative measures to maintain the long-term health of your eyes. This includes making modifications to your workstation, as well as practicing healthy eye techniques and strategies.

However, the path to saving your eyes from long-term damage starts with the computer monitor you choose.  Choosing a flicker-free monitor – a display that maintains a steady stream of light – is one of the healthiest choices you can make to protect your eyes.

Before we talk about how the right computer monitor can protect your eyes, we need to first understand how digital displays can potentially degrade your vision over time.

Most computers on the market today are designed with LED backlighting, which enhances the computer screen’s clarity, brilliance, contrast, definition, and graphics. LED backlighting emits blue light waves that radiate at a brighter intensity than that of natural light or other light waves on the light spectrum. The light from a digital display is composed of what is known as HEV light (high-energy visible light). HEV light occurs in the violet/blue part of the visible spectrum.

Our eyes are not naturally equipped to protect against and filter out intense blue light, meaning that the higher energy of blue light waves can be particularly damaging to your lenses and retinas without taking the correct measures. (For example, switching from a screen to a projector.)

Consistent exposure to harmful blue light rays can cause eye fatigue, dryness, and irritation. It may also lead to digital eye strain or Computer Vision Syndrome, which encompasses a host of accompanying problems and issues, among them headaches, vertigo, and neck pain.

When selecting a computer monitor, you need to be aware of the potential for vision issues caused by blue light waves. Choosing a computer monitor designed to mitigate its harmful effects can be extremely beneficial in maintaining the long-term health of your eyes.

The harmful intensity and energy of blue waves isn’t the only thing you need to think about when selecting a computer monitor. Flicker also presents a genuine danger to the health of your eyes.

Monitors that use LED backlighting flicker through pulse-width modulation (PWM), which enables you to adjust the brightness of your screen easily. If you’re in a sunlit room, you’ll need a bright screen to help you see; when you’re working late at night, you may prefer to dim your screen accordingly.

PWM turns the backlight “on” and “off” quickly at a steady frequency, which decreases the brightness of the screen. This seems like it should be a good thing since you want to be able to fully control the brightness of your screen to adapt to fit your environment and your personal preferences.

The problem is that the computer screen flickers at a very fast rate imperceptible to the human eye as the backlight turns on and off. This flicker causes your pupils to rapidly move from larger to smaller, which in turn causes a multitude of eye issues, including eye strain and eye fatigue.

When you use a non-flicker-free monitor, you are exposing yourself to constant on-screen flickering, which—as we’ve discussed above—can jeopardize the health of your eyes over time. Studies reveal that after only 3 to 4 hours of use of a traditional computer monitor—one that’s not engineered with flicker-free technology – 90% of computer users may experience eye fatigue.

Short-term use of such a monitor may lead you to notice symptoms such as eye fatigue, irritation, eye dryness, short-sightedness, blurry vision, and headaches. Continued exposure could potentially cause irreversible damage to the retinal cells in your eyes.

Computer companies are beginning to address the concerns and dangers that digital displays pose to your eye health. When certain features are integrated into digital displays and computer monitors, your eyes can be successfully protected from digital eye strain.

However, implementing design changes that will have a positive impact on eye health has proven to be difficult. Many computer companies have attempted to design flicker-free monitors, but the end product fails to truly protect your eyes. In other words, not all flicker-free monitors are created equal—and some aren’t actually “flicker-free” at all.

For example, some companies have attempted to protect your eyes from on-screen flicker but have only created monitors that mask the issue or create the impression of being flicker-free.

Conventional computer monitors flicker at a fixed frequency with comparatively longer periods of time between the “on” and “off” states of the backlight. Consequently, the on-screen flicker of conventional computer monitors is very noticeable.

Some devices attempt to solve the problem of on-screen flicker by integrating PWD as well as high refresh rates. These modifications to the LED backlight actually result in an increase in the frequency of the on-screen flicker and shorten the period between the “on” and “off” states of the backlight.

Since these on-screen flickers are incredibly fast for the human eye to perceive or process, this gives a false impression that flicker has been eliminated. However, it fails to protect your eyes, as they still are forced to rapidly adjust to the “on” and “off” backlight states—only now at a faster rate.

It may seem like we’ve arrived at a catch-22. Non-flicker-free monitors have proven to harm your eyes, and traditional flicker-free monitors still, unfortunately, fail to solve this problem. So what’s the solution?

ViewSonic has used its 30 years of visual solution experience—along with a deep understanding of how traditional computer monitors harm your eyes—to develop a line of computer monitors designed to protect your eye health.

Engineered with flicker-free technology, ViewSonic’s line of monitors is created to reduce flicker and prevent eye strain, eye fatigue, and irritation as well as the development of Computer Vision Syndrome.

Each ViewSonic flicker-free monitor has integrated DC modulation LED backlights, eliminating the “on” and “off” in favor of maintaining a constant stream of light. By removing the “on” and “off” states of the backlight, flicker is completely eliminated at any brightness setting, creating a much healthier viewing experience for the user.

You can easily perform a flicker-free monitor test to determine whether your current computer monitor is flicker-free by using your computer and smartphone.

Start by setting your display to peak brightness. Turn on your mobile phone camera and point it at your computer screen. Now, with your phone’s camera focused on the screen, adjust the brightness to 50% and then eventually down to 0%.  As you lower the screen’s brightness, any flicker will become increasingly noticeable if it’s a non-flicker free monitor.

By conducting this test, you will be able to finally detect on-screen flickers that are usually imperceptible to the human eye. Once you see for yourself how much harmful on-screen flicker you’re exposed to on a daily basis, you’ll be inclined to purchase a more health-conscious computer monitor.

On-screen flicker isn’t the only problem computer users face. Companies have also tried to create monitors that protect your eyes from harsh blue light waves.

ViewSonic has designed a line of computer monitors with blue light filter technology that has been engineered to address this issue. This state-of-the-art technology helps the computer monitor maintain blue light waves that are closer in intensity to realistic, everyday colors.

Blue light filter technology filters out dangerous levels of blue light while also offering a range of 100 filter levels that will easily adapt to fit your environment while maintaining stunning color and contrast.

In addition to choosing a low blue light, flicker-free monitor, here are 6 other easy steps you can take right now to protect and maintain the health of your eyes.

Make sure your workstation is lit properly – it shouldn’t be too dim or too bright. The goal is to reduce glare and reflection so that you don’t need to strain your eyes and can maintain a healthy viewing experience

When your computer screen uses a cooler color profile, more harmful blue light can emanate. To protect your eyes, adjust the temperature profile to a setting that uses more warm tones and fewer blue ones.

Ensure a comfortable viewing experience by adjusting the contrast to a higher setting to reduce eye strain. When possible, use the night mode to adapt your workstation appropriately to a darker viewing setting.

Maintain a proper viewing distance at your workstation. You should not be situated too far or too close; according to the American Optometric Association, a healthy viewing distance means that your screen should be positioned 15 to 20 degrees below eye level, as well as 20 to 28 inches away from the eyes.

To remedy the constant exposure you receive to digital displays in everyday life, it’s critical that you take breaks to give your eyes time to recover, reducing the effects of eye strain. Follow the 20-20-20 rule: every 20 minutes, you should focus your eyes on a point 20 feet away from the computer screen for a total of 20 seconds.

If you find yourself leaning forward to peer at your screen or squinting to make out a word, it’s time toincrease the text size on your device. Your operating system will allow you to make changes to the size of the text you see across all programs, and may even allow you to choose a preferred typeface to aid you in reading.

Screens are everywhere today. If you work in an office, you use one to edit documents and create spreadsheets; if you work in a store or a restaurant, you use a digital point-of-sale system. When you’re off the clock, you use your devices to watch movies, text friends, and shop for clothes. Even when you’re driving, you’re looking at the GPS or passing by digital billboards.

To ensure that your eyes stay healthy, you need to stay aware of the potential dangers of continued exposure to computer monitors. The key is understanding how certain computer monitors can impact the health of your eyes, either positively or negatively.

Start by taking the flicker-free monitor test to find out what level of flicker you’re exposed to on a regular basis. If your test shows that your monitor performs poorly, or if you’re experiencing eye fatigue or other issues like headaches or neck pain, it may be time to consider a new monitor.

When selecting computer monitors for business purposes, ensure that the monitors you choose are flicker-free for optimum eye health and include integrated blue light filter technology.

The next step is to configure your workstation as needed. When setting up your monitor, be sure to take into account ergonomics recommendations with regard to viewing distance and viewing angle.

For more information, visit ViewSonic to learn more about our innovative visual solution technologies, how to maintain an ergonomically sound workstation, and other healthy eye practices.

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An import function allows additionally to use Windows fonts. With the FontEditor it is easy to generate for example Cyrillic, Greek and Arabic fonts. The preview function shows immediately the size and style in simulation window. When the testboard EA 9780-2USB is connected to the USB port, you can see the character (or any predefined text) live on the display which is plugged-in!

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Dell offers a Premium Panel Exchange that ensures zero "bright pixel" defects on Dell Consumer, Professional, UltraSharp, and Gaming including Alienware monitors.

Defective pixels do not necessarily impair the performance of the monitor. However, they can be distracting, especially if the pixels are in positions where viewing quality is reduced.

Unyielding commitment to quality and customer satisfaction has driven Dell to offer a Premium Panel Exchange as part of the standard limited hardware warranty. Even if one bright pixel is found, a free monitor exchange is supported during the limited hardware warranty period.

Premium Panel Exchange is available for Dell Consumer, Professional, UltraSharp, and Gaming (including Alienware) monitors that are sold with computers or as stand-alone units, with a standard 1-year or 3-year limited hardware warranty. Customers who purchase an extended warranty can also take advantage of this coverage during the limited hardware warranty period.

Accidental Damage is any damage due to an unintentional act that is not the direct result of a manufacturing defect or failure. Accidental damage is not covered under the standard warranty of the product. Such damage is often the result of a drop or an impact on the LCD screen or any other part of the product which may render the device non-functional. Such types of damage are only covered under an Accidental Damage service offering which is an optional add-on to the basic warranty of the product. Accidental Damage must not be confused with an occasional dead or stuck pixel on the LCD panel. For more information about dead or stuck pixels, see the Dell Display Pixel Guidelines.

No, accidental damage is covered for Dell computers or monitors which are covered under the Accidental Damage Service offering for that specific product.

For more information about Dell Limited Hardware Warranty and Dell"s Accidental Damage service offering, see the Dell Warranty & Support Services page.

NOTE: Other damages may be considered customer induced if determined by Dell Technical Support, an on-site field engineer, or at the mail-in repair center.

The LCD glass on the display is manufactured to rigorous specifications and standards and will not typically crack or break on its own under normal use. In general, cracked, or broken glass is considered accidental damage and is not covered under the standard warranty.

Internal cracks typically occur due to excessive force on the screen. This can be the result of some object hitting the screen, a drop, attempting to close the lid while an object is on the keypad area, or even holding the laptop by its screen.

Spots typically occur due to an external force hitting the screen causing damage to the LCD panel"s backlight assembly. While the top layer did not crack or break, the underlying area was compressed and damaged causing this effect.

If your Dell laptop LCD panel has any accidental damage but the laptop is not covered by the Accidental Damage service offering, contact Dell Technical Support for repair options.

Dell monitors cannot be repaired by an on-site field engineer or at the mail-in repair center. If you notice any damage to the monitor, you must purchase a new monitor.

Laptop users can strive to make the most of their laptops to maximize stability, longevity, and usability. Understanding and implementing a few best practices for the safe handling of their laptop will enable them to enjoy their laptop for many years to come. For more information, see the Dell knowledge base article Dell Laptop Best Practices for Care, Use, and Handling.

If you suspect you have one, but you aren"t sure, investigate more closely with tools like the Dead Pixels Test or CheckPixels.com. These programs often display solid colors on the entire screen, allowing your eyes to more easily pick out pixels that aren"t functioning properly.

Dead pixels can"t be fixed in most cases, but you can sometimes revive those pixels. We have a few solutions for you to try before you send your device out for repairs.

Dead pixels are not the same as stuck pixels. These pixels look almost the same, but there"s an important distinction. A dead pixel won"t turn on, whereas a stuck pixel is permanently on. Since it"s permanently on, it typically appears as a bright, persistent dot on the screen, and is either red, green, blue, or white. If a problematic pixel is dead, it should look like a small black rectangle.

The most common cause of dead pixels is a manufacturing defect. Undetectably small errors in assembly can result in a handful of dead pixels among the millions of functional ones.

It may go away on its own, but there"s no telling how long it will take. You might have the dead pixel for the remainder of the device"s life, or it might go away in a week.

Many manufacturers have warranties that cover dead pixels, so check your device"s warranty to see if this situation applies to you. Most display manufacturers require a minimum number of dead pixels before the screen can be replaced.

You may come across other methods of fixing this problem yourself, including "pressure" and "heat" methods. We do not recommend trying these methods as they can make the problem much worse if not done properly!

There isn"t a lot you can do to fix dead pixels; most people tend to buy a new tablet, computer, or TV when pixels start going bad. If you"re not comfortable with replacing the screen yourself (most people aren"t), then the next step is to find a local repair shop if your device is no longer under warranty or break out the wallet.

By and large, dead pixels are considered to be fairly normal when it comes to LCD displays—for example, Dell says dead pixels are not uncommon. And the larger the screen, the less likely we are to notice a few dead pixels among thousands of active ones.

Everyone has their own opinion on what they consider "acceptable" when it comes to dead pixels, but generally it depends on whether or not you even notice them in the first place. But generally speaking, anywhere from one to five inactive pixels is considered okay according to industry standards.

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