Have you heard of backlight bleeding? With the exception of electroluminescent (EL) displays, most displays feature a backlighting system. The backlighting system is designed to illuminate the display’s pixels so that the pixels become visible. Some displays, however, may suffer from backlight bleeding. What is backlight bleeding exactly?

Overview of Backlight Bleeding

Backlight bleeding is a phenomenon in which the light produced by a display’s backlighting systems leaks out. Normally, the edges or “bezels” of the display should stop the light. If you see any light leaking from the edges, the display is probably suffering from backlight bleeding. Backlight bleeding is the result of light from the backlighting system making its way past the edges.

The Impact of Backlight Bleeding

While most displays will continue to turn on and work with backlight bleeding, this phenomenon can still affect their image quality. Displays with backlight bleeding produce lower-quality images than their counterparts that don’t suffer from backlight bleeding.

When backlight bleeding occurs, the display will produce light in areas that should be dark or black. You can check to see if a display is suffering from backlight bleeding by turning it to a mostly dark screen, such as a settings screen. The edges of the display should be the same dark color as the rest of the screen. If you see light present along the edges, your display is probably suffering from backlight bleeding.

You may notice the following when dealing with a display that has backlight bleeding:

  • Distorted colors
  • Light leaking from the edges
  • Patches of light colors
  • Dimmer-than-usual light
  • Uneven lighting

How to Avoid Backlight Bleeding

You can avoid backlight bleeding by choosing the right display. Some displays are constructed with a greater emphasis on quality than others. High-quality displays such as this are less likely to suffer from backlight bleeding.

If a display is manufactured with an improperly positioned panel over the backlighting system, it will be susceptible to backlight bleeding. The panel may be too tight or too loose, in which case light may leak from around the edges.

Liquid-crystal displays (LCDs) aren’t immune to backlight bleeding. Like most other displays, they can still suffer from this lighting-related phenomenon. But high-quality LCDs offer a high level of protection against backlight bleeding. If you’re worried about backlight bleeding affecting the image quality, choose a high-quality LCD made by a reputable manufacturer.