Liquid crystal display device having an improved video line driver circuit
US6556182B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 24, 2000 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | May 3, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display element having pixels, video signal lines applying a video signal voltage to the pixels and a video signal line driver supplying the video signal voltages to the video signal lines. The video signal line driver circuit includes a gray-scale voltage generating circuit provided with a resistor circuit dividing voltages between plural gray-scale reference voltages to generate plural gray-scale voltages, and selector circuits selecting one gray-scale voltage in accordance with the display data. The resistor circuit includes a resistive element provided with plural Intermediate taps for dividing voltages to generate the gray-scale voltages, gray-scale voltage lines corresponding to the gray-scale voltages, an interlayer insulating film insulating the gray-scale lines from the resistive element, and connections connecting the gray-scale voltage lines to corresponding ones of the intermediate taps through a hole in the interlayer insulating film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.