Global Patent Index - EP 1258858 A1

EP 1258858 A1 2002-11-20 - Dynamic color calibration method

Title (en)

Dynamic color calibration method

Title (de)

Dynamisches Farbeichungsverfahren

Title (fr)

Procédé dynamique de calibrage de couleurs

Publication

EP 1258858 A1 (EN)

Application

EP 01112259 A

Priority

EP 01112259 A

Abstract (en)

A dynamic color temperature and color deviation calibration method is provided for eliminating problems associated with color temperature change and color deviation caused by an emissivity change of red, green and blue phosphor layers of a plasma display panel (PDP). The method comprises the steps of utilizing laws of color matching for calculating an emissivity change of a pixel of the PDP in response to a brightness change of one of red, green, and blue lights emitted by a corresponding one of red, green and blue discharge cells of the PDP through a numeric operation; dynamically adjusting brightness of one of the emitted red, green, and blue lights by increasing or decreasing strength of input video signal of each of the discharge cells; and eliminating a color temperature and a color deviation of the PDP due to an emissivity change. This can render an image having an optimum color purity and color temperature by eliminating adverse effects on PDP due to emissivity change. <IMAGE>

IPC 1-7 (main, further and additional classification)

G09G 3/28

IPC 8 full level (invention and additional information)

G09G 3/28 (2013.01)

CPC (invention and additional information)

G09G 3/2003 (2013.01); G09G 3/288 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/041 (2013.01); G09G 2320/0626 (2013.01); G09G 2320/0666 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB IT NL

EPO simple patent family

EP 1258858 A1 20021120

INPADOC legal status


2008-04-30 [18W] APPLICATION WITHDRAWN

- Effective date: 20080318

2007-12-19 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20071115

2003-08-06 [AKX] PAYMENT OF DESIGNATION FEES

- Designated State(s): DE FR GB IT NL

2003-05-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20030307

2002-11-20 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-11-20 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI