Display apparatus displaying pseudo gray levels and method for displaying the same
US6788306B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2001 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | Nov 16, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/2059
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display apparatus is composed of a pseudo gray level data processor generating pseudo gray level data having m bits based on input gray level data having n bits. The pseudo gray level data processor includes a state variable generator generating a state variable data having n−m bits, based on lower n−m bits of the input gray level data, an adder calculating a sum of the lower n−m bits of the input gray level data and the state variable data to output a carry bit representative of carry-over of the sum, and a pseudo gray level data calculator generating the pseudo gray level data based on the input gray level data and the carry bit. The pseudo gray level data calculator defines the pseudo gray level data such that the pseudo gray level data equals upper m bits of the input gray level data in a first case when the carry bit is “0” and the input gray level belongs to first gray levels of the 2n gray levels, and such that upper m−1 bits of the pseudo gray level data equals upper m−1 bits of the input gray level data and LSB (least significant bit) of the pseudo gray level data is selected from “0” and “1” in a second c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.