LCD Basics

To understand how pixel problems develop in an LCD monitor, it is important to have a basic understanding of the underlying technology of the LCD monitor. Unlike CRTs that are actively generating the light through phosphors, an LCD actually takes white light and filters it to get the desired colors. To do this for each given pixel, three sub pixels are defined for red, green and blue light. When the sub-pixel is off, the filter will block the specified color of light. When the sub-pixel is on, it will open the filter to let a desired amount of light through.