Dithering

It is divided into dithering without and with FRC. Dithering without FRC is a method where the calculation is done according to the following example: The display can only display black and white. How to achieve 50% gray? Just "stack" white and black pixels in a checkerboard and gray color is created (of course, if we look at the pattern from a sufficient distance so that the pattern disappears). And dithering works the same way with LCD, only we work with more colors. Usually a 2×2 pattern is used. This form of dithering is used the most today. Dithering with FRC is a form where the color is calculated due to the flickering of a pixel between two colors. If we want to display 50% gray again, it is enough for the pixel to flicker between white and black with sufficient frequency for the eye to combine these two colors into one. This form of dithering is often used by older LG monitors. If the monitor uses FRC, the image is restless. I would describe the effect the image produces as "sand shifting".