Liquid crystal display device having an improved backlight
US7990361B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 6, 2009 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Apr 1, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0233
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display device includes a liquid crystal display panel having a liquid crystal layer sandwiched between a pair of transparent substrates, at least one of which has patterned electrodes on an inner surface thereof, and a backlight disposed behind the liquid crystal display panel. The backlight has at least one discharge tube including a sealed-off transparent tube, a phosphor film formed on an inner surface of the sealed-off transparent tube, and a discharge gas within the sealed-off transparent tube and plural electrodes spaced in a direction of an axis of the sealed-off transparent tube and positioned at least partially around a circumference of the sealed-off transparent tube. At least two adjacent ones of the plural electrodes is supplied with alternating voltages different in frequency from each other, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.