Liquid crystal display device having direct backlight with an odd number of fluorescent lamps providing enhanced brightness at center of screen
US7826008B2 · kind B2 · utility
4Cited by
1References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 8, 2008 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Oct 16, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133604
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present inventions enhances the brightness at a center portion of a display screen in a liquid crystal display device used in a TV set having a direct backlight. Odd-number pieces of fluorescent lamps are used in the inside of the backlight. Using external electrode fluorescent lamps as the fluorescent lamps, electrodes of the respective fluorescent lamps can be connected in common. Further, one fluorescent lamp can be arranged at the center of the display screen. Due to such a constitution, the liquid crystal display device can effectively ensure the brightness at the center of the display screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.