Lcd display simple point that is screen and backlight components.COG LCD module TV display unit is a liquid crystal module, its status is equivalent to the CRT tube. The other part includes a power supply circuit, a signal processing circuit, etc., and of course the housing or something. The main screen is divided into modules and backlight components. The two parts are assembled together, but when the work is independent of (COG LCD Module , the circuit is not relevant). Principle of LCD backlight unit is uniform surface emitted light, the light transmitted through the LCD screen of our eyes. The screen in pixels is the role of these light processing to display an image. When the liquid crystal panel manufacturing selected control IC, filters and accessories directed film, the contrast with the panel about the relative CRT monitors easily reach 500: 1 contrast ratio even higher in terms. Only I2C Lcd Module  LCD monitors in order to achieve this such an extent. COG LCD module is a substance that is between the solid and liquid itself is not light, and requires the use of an additional light source to the job. Therefore, the relationship between the number of lamp LCD monitor brightness. The first LCD monitor only down two lamp, to the present, universal minimum is four lights, high-end six lights. Four lamp design placed into three forms: one is the four sides each have a lamp, but the drawback is in the middle there will be shadows, the solution is on the way from the lower level of the four lamps arranged, the last one is placed in the form of a "U" is in fact a disguised produced two lights two lamps.