Method of and unit for displaying an image in sub-fields
US6703991B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2001 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Jan 10, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0266
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display device (406) is driven in a number of sub-fields. Each of the sub-fields is for outputting a respective illumination level by the display device. In each sub-field, a pixel of the displayed image may emit an amount of light corresponding to the particular sub-field, depending on whether it is switched on or not. A required intensity level of the pixel is realized by selecting an appropriate combination of sub-fields in which the pixel is switched on. The number and relative weights of the available sub-fields are such that an intensity level can be realized in more than one way. In the display unit (300) for driving the device, the sub-pixels of a pixel are separately controlled regarding the choice as how the required intensity level is to be realized. The combinations of sub-fields for the respective sub-pixels are selected such that the sub-pixels have their subjective peak in luminance at different instants in the field period, thus reducing the flicker of the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.