Liquid crystal display device having an improved lighting device
US7138974B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 8, 2003 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Aug 8, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display device includes a liquid crystal display panel having plural pixels, a lighting device having at least one light source and projecting light generated by the light source on the liquid crystal display panel, and a circuit supplying a first current during a first period and a second current smaller than the first current during a second period to the light source alternately. The circuit includes a current monitoring circuit which measures the first current and the second current, and a light control circuit which adjusts a ratio of the first period to the second period based upon a signal from the current monitoring circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.