light leak gray and black background after effects

The back, far right, of the image is the backlight itself surrounded by the plastic frame of the TV. This is actually translucent 'white' plastic. The next layer (the bright white area in front of the gray plastic), is the diffusion layer.

The next layer (where you see the image) is the liquid crystal layer.

The layer on the far left is the clear covering surface. What you're seeing is the entire TV, spread out so that each layer is separate and visible. Below is a look at the layers of a typical CCFL backlight TV. Because it's not perfect, parts of the screen are going to 'leak' light.ĬCFL backlights are a series of tiny fluorescent lights, like miniature versions of what's found in offices, stores, etc. This LC/backlight system is never perfect, either due to manufacturing irregularities, design inefficiencies, or whathaveyou. In other words, during a dark scene, the backlight may dim so the image appears darker than what would be possible with just the liquid crystal. In more expensive TVs, the backlight may adjust depending on what is going on with the video. In the simplest of LCD TVs, the backlight creates a set amount of light. Let's just say the LC 'blocks' the light. OK, so technically polarization filters block the light, the liquidĬrystal just twists the polarization, but for the ease of discussion, The LC glass is a complex sandwich of electrodes and liquid crystal whose sole job is to block the light created by the backlight. As I'll explain below, 'LED TVs' are just regular LCD TVs that use LEDs as their backlight. On dark scenes, this can be visible and sometimes distracting.Īll LCD TVs are essentially two parts: a backlight, and the Liquid Crystal 'glass.' The backlight, commonly CCFL or LEDs, creates all the light. Certain areas of the screen are going to be brighter than other areas. Nearly every LCD TV on the market has a problem: uniformity.

Light leak gray and black background after effects