Although the LCD screen can Display tens of thousands of colors, its internal luminous source has only one color and it can only emit white light. So how do engineers make this kind of light change thousands of colors?
It turns out that engineers used a material called liquid crystal, which can control the magnitude of the voltage to control the amount of light passing through, so that the backlight layer of the lcd can pass through the liquid crystal, so that we can control the amount of light passing through. lcd is The acronym for liquid crystal Display, but this does not constitute the color image we see, so while adding the liquid crystal layer, it is still necessary to add a colored light-transmitting film to it, so that it can display different reds, generally 256 red songs are displayed. By controlling each lcd panel, and then adding red, green and blue light-transmitting films, a pixel on the screen is formed. Each color has 256 kinds of brightness, and the combination of three colors can Display 16 million colors.