Light sensing panel, and liquid crystal display apparatus having the same
US7208718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2004 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Apr 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13312
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light sensing panel includes a scan line transmitting a scan signal, a power source line transmitting a bias voltage, a readout line transmitting a light sensing signal and a light sensing device. The light sensing device includes a control electrode that is electrically connected to the scan line to receive the scan signal, a first current electrode that is electrically connected to the power source line to receive the bias voltage, and a second current electrode that is electrically connected to the readout line to apply a light sensing signal to the readout line when the light sensing signal senses an external light. The light sensing panel requires only one thin film transistor in order to detect a position wherein the external light is incident. Therefore, electrical coupling between devices is reduced and aperture ratio is increased, thereby enhancing a display quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.