Reflective liquid crystal display device having a black absorbent layer
US6753937B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 2001 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Apr 17, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display device including a first substrate arranged on a front side, i.e., arranged on the side receiving an incident light, and a second substrate arranged on a back side, so that this second substrate extends facing the front substrate parallel thereto, the first and second substrates being connected via a sealing frame in order to delimit between them a cavity for containing the liquid crystals and including on their opposite faces a first and a second group of electrodes, respectively. The display device is connected to a control circuit for supplying suitable control voltages to selected electrodes in order to modify the optical conditions of the liquid crystal into a reflective state or into a transparent state. The display device further includes an absorbent black layer made of an electrically non-conductive material, wherein the absorbent black layer is arranged either at the surface of the second substrate or on the second group of electrodes that is formed on the second substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.