Forming an opaque metal layer in a liquid crystal display
US4687298A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1985 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Dec 4, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display device is disclosed, which comprises first and second transparent substrates facing each other, a liquid crystal sealed between the transparent substrates, a plurality of display electrodes formed on the inner surface of the first transparent substrate, thin film transistors also formed on the first transparent substrate inner surface and each connected to each display electrode, and a transparent common electrode formed on the inner surface of the second transparent substrate, and in which the thin film transistors are selectively controlled to selectively drive the display electrodes for display. The resistance of semiconductor layers of the thin film transistors is reduced by external light to result in deterioration of the contrast of display. According to the invention, an opaque metal layer is formed between each thin film transistor and the first transparent substrate, and an insulating film is provided between the opaque metal layer and thin film transistor. Source buses of the same material as of and connected to the opaque metal layers are formed on the first transparent substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.