Backlight module and LCD comprising the same

摘要

A backlight module comprises a backplate having a baseplate and side plates, a direct-lit LED array, edge-lit LED arrays and a light guide panel. The light guide panel is located above the baseplate. The direct-lit LED array is disposed between the baseplate and the light guide panel. The edge-lit LED arrays are disposed at two sides of the light guide panel and facing light incident surfaces thereof respectively. Light scattering structures for scattering light rays are disposed on a light exiting surface or on a bottom surface of the light guide panels. With the LED arrays and the light scattering structures, the light guide panel is divided into three backlight regions. Displaying of the backlight module is controlled region by region by the light scattering structures and the LED drive circuit to improve the brightness of the backlight module and reduce the power consumption of the liquid crystal module.

主权项

1. A backlight module, comprising a backplate, a direct-lit light emitting diode (LED) array, edge-lit LED arrays and a light guide panel, the backplate comprising a baseplate and side plates, the light guide panel being located between the side plates of the backplate and above the baseplate, the direct-lit LED array being disposed on the baseplate of the backplate and located beneath a middle portion of the light guide panel; the edge-lit LED arrays being disposed at two sides of the light guide panel and opposite to light incident surfaces of the light guide panel respectively; wherein a number of light scattering structures for scattering light rays are disposed on a light exiting surface of the light guide panel at both ends of the light guide panel adjacent to the edge-lit LED arrays; the baseplate is formed with a recessed portion and two supporting portions, the recessed portion is located between the two supporting portions and lower than the supporting portion, and the direct-lit LED array is disposed on the recessed portion; the light exiting surface of the light guide panel comprises a left region, a middle region and a right region, the light scattering structures are disposed in the left region and the right region rather than in the middle region, and the middle region without the light scattering structures formed therein faces away from the direct-lit LED array disposed on the recessed portion directly.