Light guide plate: It is divided into printed type and non-printed type by the production method of light guide points.
Non-printed type of light guide plate: An excellent mold has to be produced before the process begins. Light guide plate is injected in particular shape with the mold. Some granular materials which have different refractive index are put on the surface of the plate. It looks like a lattice point.
Printed type of light guide plate: light guide points are produced with UV screen printing technology at the bottom of PMMA sheet.
Ps: It is better to make the thickness of light guide plates between 2.5mm and 3.5mm. It takes at least 2 mm of thickness of light guide plate to install DIP LED, and the thicker the brighter.
Diffusion film: It distributes the light more uniform and avoids seeing the reflecting points emerging in the front of light guide plate so that it could focus the light and increase the brightness of LED backlight.
Reflection film: It is used to reflect the light from the bottom into light guide plate to improve the using effect of the light.
Light shade film: It is used to block the light from LED Lamps and make the light more uniform.
Light shade film on the edges: It is used to reflect the light from LED Lamps and keep the light in the light guide plate.
Blocking light area has to be made more than 7mm while using the DIP LED.
Blocking light area has to be made more than 4mm while using the SMD LED.
Connecting Methods of LED backlight
Connecting methods of LED backlight include wire harness, FPC, PCB with hard PIN, PCB without hard PIN, PIN and wire. You can see the picture above.
Light area equals the total length subtracts blocking light area and double-sided adhesive area. You can see the picture as follow:
PS: AA (Active Area)