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1. KR1020070108949 - DISPLAY DEVICE, CONTRAST ADJUSTING METHOD AND CONTRAST ADJUSTING PROGRAM

Office Republic of Korea
Application Number 1020077023046
Application Date 09.10.2007
Publication Number 1020070108949
Publication Date 13.11.2007
Publication Kind A
IPC
H04N 5/57
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
44Receiver circuitry
57Control of contrast or brightness
CPC
H04N 5/57
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
44Receiver circuitry ; for the reception of television signals according to analogue transmission standards;
57Control of contrast or brightness
G09G 5/10
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
5Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
10Intensity circuits
G09G2320/0613
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
06Adjustment of display parameters
0613The adjustment depending on the type of the information to be displayed
G09G2320/0626
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
06Adjustment of display parameters
0626for control of overall brightness
G09G2320/066
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
06Adjustment of display parameters
066for control of contrast
G09G2360/16
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2360Aspects of the architecture of display systems
16Calculation or use of calculated indices related to luminance levels in display data
Applicants MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
마츠시타 덴끼 산교 가부시키가이샤
Inventors TAKABA NOBUMICHI
다카바 노부미치
Agents 김창세
Priority Data JP-P-2005-00067325 10.03.2005 JP
Title
(EN) DISPLAY DEVICE, CONTRAST ADJUSTING METHOD AND CONTRAST ADJUSTING PROGRAM
(KO) 표시 장치, 콘트라스트 조정 방법 및 콘트라스트 조정프로그램
Abstract
(EN)
A feature detecting circuit (4) detects an average luminance, a white area value and a black area value of a video signal, and a control circuit (5) controls a contrast adjusting circuit (2) to more gently change a video signal contrast gain at the time of increase compared with that at the time of reduction, in accordance with changes of the detected average illuminance, the white area value and the black area value. As a result, even when the contrast gain of the video signal is increased or reduced to adjust the contrast of the video signal, excellent video qualities can be obtained in the both cases. ©KIPO&WIPO 2008

(KO)
특징 검출 회로(4)는, 영상 신호의 평균 휘도, 백색 면적값 및 흑색 면적값을 검출하고, 제어 회로(5)는, 검출된 평균 휘도, 백색 면적값 및 흑색 면적값의 변화에 따라서 영상 신호의 콘트라스트 이득을 증가시킬 때의 변화를 감소시킬 때의 변화보다 완만하게 행하도록 콘트라스트 조정 회로(2)를 제어한다. 이 결과, 영상 신호의 콘트라스트를 조정하기 위해 영상 신호의 콘트라스트 이득을 증가 및 감소시켜도, 모두 양호한 영상 품질을 얻을 수 있다.