Reflective liquid crystal display device having an array of display pixels
US6441873B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1999 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Sep 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1368
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a reflective liquid crystal display device comprising on a substrate an array of reflective pixel electrodes which are each connected to the output of a respective switching device, e.g. a TFT, carried on the substrate and which are provided on an insulating layer that extends over the switching device, each pixel electrode is connected to the output of its associated switching device through a plurality of tapered contact openings in the insulating layer which form depressions in the pixel electrode surface for enhancing the pixel's light reflection characteristics. The number, shape, size and relative disposition of such openings can be varied to tailor these characteristics. Preferably, a conductive layer extends from the switching device output beneath the area of the pixel electrode for contacting the electrode at each opening and may have a rough surface resulting in asperities at the pixel electrode surface which further enhance its reflection properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.