Liquid crystal display device with write-in capability
US4345248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1980 |
| Grant date | Aug 17, 1982 |
| Priority date | — |
| Expiry date | Dec 12, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3688
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A novel type of liquid crystal display device is disclosed, whereby data can be written in, via the display device, by utilizing light-generating means such as a light pen. The display device is of matrix configuration, with a switching element being provided individually for each of the elements of the display matrix, and is characterized by a photoelectric element being provided for each display element, whereby data is written in. The discrimination circuit means whereby the statuses of the photoelectric elements are sensed, in a time sharing manner, can utilize the same row and column electrodes used to drive the switching elements of the display matrix, and the photoelectric elements can be formed during the same process, and upon the same substrate, as the switching elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.