What is Light Bleeding Tv And Methods to Prevent It

Backlight bleeding is a cause of worry for many TV owners. That extra light creeping out from the edge of your brand new TV screen is not something that you expect when you switch on your device. This is because the LCD employs a light behind the panel to power up the image on the screen. 

Backlight bleeding, simply put, is some of this backlight leaking through. When you buy a TV, you can expect some minor backlight bleeding due to the nature of the display technology. But this is entirely tolerable and you won’t even notice it most of the time. Only when the screen goes dark the light from the edges become really visible. 

Whether you are thinking of investing in a TN, VA, or IPS monitor, you might encounter this issue. You probably might have also noticed it when you are using the computer in a dark room, specifically while viewing something with many dark sections.

SJ8500 light bleed/cloud effect — LG Community Forum

How Does Backlight Bleeding Occur?

As mentioned earlier, the entire surface of an LCD panel is backlit from behind by a light source using either using cold cathode fluorescent lamp (CCFL) lighting system or a light-emitting diode (LED) lighting system. To display an image the LCD shines light necessary to produce the image and blocks out the rest of the light. 

Backlight bleeding most commonly occurs when this light is not fully blocked. This allows excess light to bleed or be emitted around the edges of the LCD panel. This backlight bleeding issue leaves spots of lighter areas on a dark background. 

In today’s display technology market, many LCD monitors suffer from at least a small amount of backlight bleed. This is because the opacity of LCD panels and quality materials used for the construction of the monitor are not high enough to completely block all light. The light that escapes causes a flaw in the display quality of the screen. 

Generally, backlight bleeding occurs along the edges of the screen, but it can also appear in the form of clouding or flash lighting. Clouding is common among curved VA panel displays. This happens when you can notice glowing patches that are only visible with dark scenes. These are unnoticeable when viewing regular content. Flashlight, as the name suggests, looks as if someone’s pointing a flashlight on the corners of the screen, creating bright patches. 

backlight bleed test

Backlight Bleed Test

You can test whether your TV has screen bleed problems by simply playing a backlight bleed test video from YouTube. Before you do this make sure your brightness setting is reduced. Keep it at 40 to 60 percent to detect any bleed on the screen.

Can you Fix Backlight Bleeding?

Unfortunately, there is no definite fix for backlight bleeding other than completely dismantling the monitor and adding extra light-blocking materials around the LCD panel. If you stick some electrical tape over the edges of the screen you might see a visible difference in the light bleed. 

If you don’t feel confident enough to dismantle your TV, you can try these few methods to reduce the backlight bleed of your TV screen.

  • Loosen the screws of the frame

One of the reasons for backlight bleeding might be that the panel is screwed on too tight leading to the display being warped. Take a screwdriver and loosen the screws a little. Be careful not to unscrew too much, else it may cause the screen to fall and break. 

  • Lightly twisting the display frame 

In some cases, the display might not be positioned properly inside the frame. Hence, the extra light bleeds through the edges of the screen. Try loosening the screws and then twisting the frame before switching it on to check if there is bleeding.

  • Clean the spots that indicate bleeding

Another possible cause of bleeding is that the display is not completely flat. They can be due to the accumulation of dust and grease. In this case, you need a microfiber cloth to rub the areas where there is bleeding. Clean in a circular motion with the cloth. Be careful not to apply too much pressure. Wait a few days to let the screen settle and repeat if you do not see any improvement.

  • Reduce Brightness

If all the other methods fail to reduce the screen bleeding you can try lowering the brightness of your screen. It is not the most ideal solution if you have lower image quality but if the bleeding is interfering with your movie-watching experience, this is the best way to reduce it.

m17 R3, backlight bleed - Dell Community

The ideal way to fix backlight bleed is to have the monitor exchanged if the retailer will allow it or if you have a warranty on the product that you just got. If the backlight bleed on your brand new TV is bothering you too much you will have to take your chances with a new LCD panel. In case you are planning to buy a new TV check for ones with a history of backlight bleeding and other quality control issues. 

There are also other problems your LCD can face including IPS glow, clouding, and burn-in. It is better to do thorough research before you invest in a TV because it is an expensive affair and returns might not be that easy compared to other products. But keep in mind that backlight bleeding is a common issue that LCD technology faces. Therefore, if you buy a TV with an LCD, chances are that you will end up being a victim of this problem. 

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