Direct backlight module
US9405149B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2012 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Jun 30, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133603
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a direct backlight module, which includes a backplane, a plurality of LED light bars retained on the backplane, a plurality of light guide plates arranged alternate with respect to the LED light bars, and a diffusion plate mounted on the backplane. The direct backlight module includes the light guide plates that are arranged between the LED light bars to improve utilization rate of light energy of the LED light bars so as to reduce the number of LED lights included in the LED light bars to thereby reduce the manufacturing cost. Further, the arrangement of the light guide plates effectively shortens the light mixing distance and enhances homogeneity of light illumination and also reduces the thickness of backlight module to thereby facilitate thinning of a liquid crystal display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.