If the LCD backlight system used in high-brightness

If the LCD backlight system used in high-brightness red, green and blue LED on the need for mixing device in order to reach the light source prior to blending the Tsingtek china lcd graphic lcd display module panel . In the conventional LCD backlight , color mixing is independent of the optical extraction structures ( white coating or micro-lens ) optical guide carried pole . In order to illuminate the entire display area , you have to use two light- guide plate , which causes the backlight to become heavy and thick, and there will be a light guide plate difficult to match the luminance and chrominance shortcomings .
To overcome these shortcomings, TFT Display  Module the Netherlands recently developed a new LED backlight , it is separated from the light guide plate and mixing conventional optical pumping light guide plate together.
Combined type color lcd display module backlight structure and working principle
LED light source is a light ①, the first elliptical mirror ②, mixing the light guide plate ③, a second elliptic mirror ④, reflective film ⑤, the main optical guide plate ⑥, calibration and polarization control film ⑦, ⑧ the heatsink ⑨ frame components.
Work , by the light emitted from the Serial Lcd Display Module light source via the first ① ② to make a 90 ° elliptical reflector , the light guide plate coupling people mixing ③, light by mixing the light guide plate to the corresponding white mixture , and then is coupled into the second ellipse ④ by 90 ° reflector , enter the main light guide pole ⑥. The main optical guide plate has a screen pixel pattern , the pattern is a light distribution of the LED light source were optimized . The light from the second elliptical mirror through the main optical guide plate toward the LCD panel .
To further improve the color uniformity of the main light enters the light guide plate while also equipped with a micro-prism , which is to increase the angular distribution of light , thereby improving the mixing of light color .
Built on the oval mirror with high reflectivity aluminum , and the use of lines of a high reflectance to improve the reflectance . Oval Mirror the LED of the light made with respect to the optical axis of the light guide plane rotation of 90 ° , thereby preventing the configuration of the backlight becomes more compact.
Features and Benefits
This light guide plate with the LED backlight diagonal 38cm,graphic lcd  display modulewith 34 luxeomTM type LED, the tube pitch of 9mm, drive power of 45W. With this LED backlight, has made 4300cd/m2 peak brightness .