TFT LCD with optical interference color filters
US5058997A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1989 |
| Grant date | Oct 22, 1991 |
| Priority date | — |
| Expiry date | Aug 11, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1368
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention is an improvement in a liquid crystal display device of the type having spaced front and rear glass panels, a transparent electrode layer, and an array of individually addressable pel electrodes separated from the transparent electrode layer by a cavity filled with liquid crystal material. The improvement comprises a color filter layer in the form of a decal pattern. The decal pattern is formed using interference film techniques which form an inorganic color filter. The decal is placed on one of the glass panels using known decal transfer methods. The inorganic nature of the color filter layer and the decal transfer methods allow for enhanced optical density of the color liquid crystal display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.