Patent · US Expired

Display device with improved representation of the shades of grey

US6618056B1 · kind B1 · utility

2Cited by

8References

13Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Gerhard Spekowius · Straelen, DE
Harald Reiter · Aachen, DE
Martin Weibrecht · Aachen, DE
Peter Quadflieg · Aachen, DE

Key dates

Filing date	Aug 15, 2000
Grant date	Sep 9, 2003
Priority date	—
Expiry date	Aug 15, 2020

Classification

Technology area (CPC G)Physics
CPC primaryG06T2207/10116
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

The invention relates to a display device for rendering gray tone images on a monitor controlled by s electron rays. The display device includes a correction unit for generating s output image signals As composed of gray tone values forming part of a set K of correction gray tones from an image signal. The image signal is composed of gray tone values forming part of a set M of original gray tones, and the s output image signals As, after a D/A conversion, are fed each to one electron ray for a brightness-corrected rendering of a gray tone in one pixel of the monitor for the purpose of adapting the brightness distribution of the monitor to the optimum perceptional brightness distribution.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.