Touch sensitive flat panel display
US5777596A · kind A · utility
217Cited by
14References
41Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1995 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Nov 13, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13338
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a touch sensitive LCD flat panel display. The display allows a user to provide input into a computer device by simply touching an LCD display screen with a passive device, such as a finger, stylus, or a ball point pen. The invention includes circuitry which continuously compares the charge times of the liquid crystal elements of the display to a reference value and uses the results of the comparison to determine which elements in the display are currently being touched.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.