Liquid crystal display device comprising a C-DAC and wherein a light blocking film opposes the C-DAC and contacts the liquid crystal
US7006176B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2002 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Nov 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/027
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display device comprises a poly-silicon TFT substrate having a condenser type digital analog converter, an another substrate disposed so as to face the poly-silicon TFT substrate, and liquid crystal positioned between the poly-silicon TFT substrate and the another substrate. In this liquid crystal device, a light blocking film is formed on a surface of the another substrate and contacts with the liquid crystal. The light blocking film has a resistance larger than n·τ/CLC wherein n is a number of bits of the condenser type digital analog converter, τ is an operation stabilizing time of a condenser per one bit, and CLC is electrostatic capacitance between the poly-silicon TFT substrate and the another substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.