TFT LCD is more complex, including fluorescent tube, light guide plate, polarizer, filter board, glass substrate, alignment film, liquid crystal material, thin mode transistor and so on.
First, LCD must use backlight, that is, fluorescent lamp tube to project light source. These light sources will first pass through a polarizing plate and then through the liquid crystal. At this time, the arrangement of liquid crystal molecules will change the angle of light penetrating through the liquid crystal.
The light must then pass through the front color filter and another polarizer. Therefore, we can control the light intensity and color of the final appearance by changing the voltage value of stimulating liquid crystal, and then change the color combination of different shades on the liquid crystal panel.
