Liquid crystal display with touch screen function and method for detecting external illuminance using the same
US8659576B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2009 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Dec 26, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13312
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An Liquid Crystal Display (LCD) with a touch screen function includes an array substrate having a display region and a photosensitive region divided by data lines, scan lines, and common lines, wherein the photosensitive region includes a switching element having a first terminal connected to an (n−1)th scan line to receive a select signal and a second terminal connected to a readout system, a charge storage element having a first terminal connected to a third terminal of the switching element and a second terminal connected to the common lines, and a photosensitive element having a first terminal connected to an nth scan line and a second terminal connected to the first terminal of the charge storage element, wherein when the photosensitive element is turned on according to external illuminance, the charge storage element is discharged and the readout system detects a difference of external illuminance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.