LCD module displays simple point that is screen, backlit panels, PCB board, iron box

 Principle lcd module displays a backlight unit issued uniform surface light, the light transmitted through the LCD screen in our eyes. The screen in pixels is the role of these light processing to display an image. Two parts contain large number of components. Lcd module displays the manufacture of selected control IC, filters and accessories directed film, the contrast with the panel related to the general user, the contrast can reach  one is enough, but this is also in the professional field the contrast level can not meet the needs of users. CRT monitors relatively easily reach TFT Display Module  contrast ratio even higher terms. Only high-end LCD monitors in order to achieve this such an extent, because the contrast is difficult to accurately measured by the instrument, so pick a time or to personally go to the job. LCD 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, graphic lcd display module  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. Six lamp design actually used three tubes, manufacturers will have three tubes bent "U" type, and then placed in parallel to achieve the six lamp effect.lcd module displays simple point that is screen, backlit panels, PCB board, iron box.