Balanced LED backlighting for liquid crystal display (LCD)
US8368628B2 · kind B2 · utility
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18References
20Claims
0Family size
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Key dates
| Filing date | Dec 5, 2011 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Dec 5, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Techniques for providing LED-based backlighting in liquid crystal flat panel displays are disclosed. In one embodiment, optical sensors are provided to sense illuminations from colored LED groups and provide feedback signals to a controller so that a desired ratio of the illuminations is maintained. As a result, true colors could be reproduced regardless of possible irregularities that may be happening to LEDs used in the colored LED groups to backlight an LCD panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.