Multi-source LCD backlight for white balance adjustment
US8487850B1 · kind B1 · utility
1Cited by
22References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2000 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Dec 6, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display (LCD) panel has a variable white balance. The LCD panel includes an LCD screen, a first light source, a second light source and a light path directing the first and second light sources onto the LCD screen and a control circuit used to adjust the relative intensities of the first and second light sources. The first light source has a first color spectrum and the second light source a second color spectrum. The color spectrums of the first and second light sources are mixed in the light path to create a balanced white spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.