KR970071061A - Temperature compensation circuit of a TFT liquid crystal panel - Google Patents

Temperature compensation circuit of a TFT liquid crystal panel Download PDF

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Publication number
KR970071061A
KR970071061A KR1019960010680A KR19960010680A KR970071061A KR 970071061 A KR970071061 A KR 970071061A KR 1019960010680 A KR1019960010680 A KR 1019960010680A KR 19960010680 A KR19960010680 A KR 19960010680A KR 970071061 A KR970071061 A KR 970071061A
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KR
South Korea
Prior art keywords
liquid crystal
temperature
crystal panel
temperature compensation
capacitor
Prior art date
Application number
KR1019960010680A
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Korean (ko)
Inventor
문범진
Original Assignee
구자홍
Lg 전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 구자홍, Lg 전자주식회사 filed Critical 구자홍
Priority to KR1019960010680A priority Critical patent/KR970071061A/en
Publication of KR970071061A publication Critical patent/KR970071061A/en

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Abstract

본 발명은 TFT 액정패널의 온도보상회로에 관한 것이다.The present invention relates to a temperature compensation circuit of a TFT liquid crystal panel.

종래의 TFT 액정표시 패널은 온도보상을 위하여 온도변화에 따라 전기저항치가 달라지는 온도검출소자인 서미스터(Thermistor)를 사용하여 온도보상을 기하였으나, 이는 별도의 서미스터를 구비해야 하므로 많은 공간을 필요로 할 뿐만 아니라 온도보상이 불한정한 문제점이 있었다.In a conventional TFT liquid crystal display panel, temperature compensation is performed using a thermistor, which is a temperature detecting element whose electric resistance value changes according to a temperature change for temperature compensation. However, since a separate thermistor must be provided, In addition, there was a definite problem that temperature compensation was not performed.

따라서 본 발명은 상기한 종래 기술의 문제점을 개선코자하여 별도의 서미스터없이 온도변화를 검출하기 위한 실제 액정 패널상에 마련된 액정 캐패시터와 별도의 온도 의존성이 작은 기준 캐패시터와 상기 캐패시터 사이의 전위차를 연산증폭기의 반전단에 접속하고 설정이득에 따라 반전증폭 출력하여 온도를 검출하고 게인 콘롤러에서 교류조정하여 보정신호를 Vcom 구동회로 또는 소스 구동회로에 출력하므로써, 액정패널의 주위환경 변화나 광원용 조명으로 사용되는 백라이트(Backlight)등의 영향에 의한 액정의 열화를 검출하여 온도에 따른 투과도의 변화를 보상해 줌으로서 콘트라스트(Contrast)나 화질을 개선하도록 한 것이다.SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and a liquid crystal display device, And outputting a correction signal to the Vcom drive circuit or the source drive circuit by adjusting the alternating current at the gain cone roller to detect the change in the ambient environment of the liquid crystal panel or the illumination of the light source The deterioration of the liquid crystal due to the influence of backlight or the like is detected and the change of the transmittance according to the temperature is compensated to improve the contrast and the image quality.

Description

티에트(TFT) 액정패널의 온도보상회로Temperature compensating circuit of a thin film transistor (TFT) liquid crystal panel

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제4도는 본 발명에 의한 TFT의 액정패널의 온도보상회로 구성도FIG. 4 is a configuration diagram of a temperature compensation circuit of a liquid crystal panel of a TFT according to the present invention

Claims (5)

액정 패널의 실제온도를 검출하여 기준온도와 배교 판단하는 액정 패널 온도 검출수단과, 상기 액정 패널 온도 검출수단으로부터 온도비교 결과에 의해 출력된 신호에 따라 Vcom 신호와 동기된 보정신호를 소스 구동회로 및 Vcom 구동회로에 출력하는 게인 제어수단을 포함하여 구성된 것을 특징으로 한 TFT 액정패널의 온도보상회로.A liquid crystal panel temperature detecting means for detecting an actual temperature of the liquid crystal panel and judging whether or not the liquid crystal panel is actually in contact with a reference temperature; and a correction means for correcting the correction signal synchronized with the Vcom signal according to a signal output from the liquid crystal panel temperature detecting means, And a gain control means for outputting the voltage to the Vcom drive circuit. 제1항에 있어서, 상기 액정패널 온도 검출수단은 액정패널의 실제온도을 감지하는 온도감지 액정 캐패시터와, 상기 온도감지 액정 캐패시터에 감지된 온도와 비교하기 위한 기준 또는 온도 의존성이 작은 기준 캐패시터와, 상기 온도감지액정 캐패시터와 기준 캐패시터 사이의 전위차를 설정이득에 따라 반전증폭하는 증폭부로 구성하여된 것을 특징으로 한 TFT 액정패널의 온도보상회로.2. The liquid crystal display device according to claim 1, wherein the liquid crystal panel temperature detecting means comprises: a temperature sensing liquid crystal capacitor for sensing an actual temperature of the liquid crystal panel; a reference capacitor having a small reference or temperature dependency for comparison with a temperature sensed by the temperature sensing liquid crystal capacitor; And an amplifier for amplifying the potential difference between the temperature sensing liquid crystal capacitor and the reference capacitor in accordance with the set gain. 제2항에 있어서, 상기 온도감지 액정 캐패시터는 액정패널 내의 영상 데이터가 출력되지 않는 어느 특정부위를 선택하여 하나 혹은 복수개 화소크기로 이루어짐을 특징으로 한 TFT 액정패널의 온도보상회로.3. The temperature compensation circuit of claim 2, wherein the temperature sensing liquid crystal capacitor comprises one or a plurality of pixel sizes selected from a specific region where no image data is output in the liquid crystal panel. 제2항에 있어서, 상기 온도감지 액정 캐패시터는 액정패널 외측의 소정위치에 부착함을 특징으로 한 TFT 액정패널의 온도보상회로.The temperature compensation circuit of claim 2, wherein the temperature sensing liquid crystal capacitor is attached to a predetermined position outside the liquid crystal panel. 제2항에 있어서, 상기 기준 캐패시터는 온도 의존성이 작은 피씨비상의 마이크로 스트림 라인으로 이루어짐을 특징으로 한 TFT 액정패널의 온도보상회로.The temperature compensation circuit of claim 2, wherein the reference capacitor comprises a microstrip line of a PC with a low temperature dependency. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960010680A 1996-04-10 1996-04-10 Temperature compensation circuit of a TFT liquid crystal panel KR970071061A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960010680A KR970071061A (en) 1996-04-10 1996-04-10 Temperature compensation circuit of a TFT liquid crystal panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960010680A KR970071061A (en) 1996-04-10 1996-04-10 Temperature compensation circuit of a TFT liquid crystal panel

Publications (1)

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KR970071061A true KR970071061A (en) 1997-11-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990053687A (en) * 1997-12-24 1999-07-15 윤종용 Temperature Compensation Circuit of TF LCD
KR100667060B1 (en) * 2003-11-03 2007-01-10 삼성에스디아이 주식회사 LCD Pannel and method to have suitable display characteristic at circumference environment
KR100820843B1 (en) * 2002-05-13 2008-04-11 삼성전자주식회사 Liquid crystal display, method for detecting an inner temperature thereof and method for compensating a quality of image thereof
US7839478B2 (en) 2005-07-15 2010-11-23 Samung Electronics Co., Ltd. Temperature sensor for display device, thin film transistor array panel including the temperature sensor, liquid crystal display, driving circuit for liquid crystal display and flicker controlling system for liquid crystal display

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990053687A (en) * 1997-12-24 1999-07-15 윤종용 Temperature Compensation Circuit of TF LCD
KR100820843B1 (en) * 2002-05-13 2008-04-11 삼성전자주식회사 Liquid crystal display, method for detecting an inner temperature thereof and method for compensating a quality of image thereof
KR100667060B1 (en) * 2003-11-03 2007-01-10 삼성에스디아이 주식회사 LCD Pannel and method to have suitable display characteristic at circumference environment
US7839478B2 (en) 2005-07-15 2010-11-23 Samung Electronics Co., Ltd. Temperature sensor for display device, thin film transistor array panel including the temperature sensor, liquid crystal display, driving circuit for liquid crystal display and flicker controlling system for liquid crystal display

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