Transverse electrical field LCD with islands having a pattern the same as the combined pattern of gate electrodes, gate bus lines and counter electrodes
US5990987A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1998 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Nov 17, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/134363
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a production process for a transverse electrical field type active matrix liquid crystal display apparatus, a photolithographic step is eliminated to reduce the cost. There are formed on an insulating substrate carrying thin-film transistors as switching elements, drain electrodes 31, drain bus lines 32 connected to the drain electrodes 31, source electrodes 33 and pixel electrodes 34 formed by the first low-resistance electrically conductive film 3. Islands are formed on the resulting assembly by a semiconductor film. There are further formed on the resulting product gate electrodes 61, gate bus lines 62 and counter electrodes 63. The gate electrodes 61, gate bus lines 62, counter electrodes 63 and the islands 71 can be formed by a sole photolithographic step to reduce the number of the photographic steps and hence the cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.