Image display
US7286105B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2003 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Sep 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides an image display capable of performing high-precision multi-gradation display while avoiding problems of a subtle noise and increase in a drive frequency. Display signal data of one frame is constructed by a plurality of sub frames of, for example, four sub frames 1/4 to 4/4. The 1/4 frame is set as an address period of an analog signal, the 2/4 frame is set as an analog gradation display period, the 3/4 frame is set as an address period of a digital signal, and the 4/4 frame is set as a digital gradation light emission period. The image display is constructed in such a manner that, in the analog gradation display period, an OLED device in a pixel emits light of time according to an analog signal voltage stored in a storage capacitor in the pixel by an analog drive signal circuit and, in the digital gradation display period, a binary light emitting operation of light emission and non light emission is performed according to a digital signal voltage stored in the storage capacitor by a digital signal driving circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.