KR0121151B1 - Temperature detecting device of liquid crystal display elements - Google Patents
Temperature detecting device of liquid crystal display elementsInfo
- Publication number
- KR0121151B1 KR0121151B1 KR1019930022651A KR930022651A KR0121151B1 KR 0121151 B1 KR0121151 B1 KR 0121151B1 KR 1019930022651 A KR1019930022651 A KR 1019930022651A KR 930022651 A KR930022651 A KR 930022651A KR 0121151 B1 KR0121151 B1 KR 0121151B1
- Authority
- KR
- South Korea
- Prior art keywords
- liquid crystal
- temperature
- crystal display
- display device
- electrical signal
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/041—Temperature compensation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
본 발명은 액정표시소자의 온도검출장치에 관한 것으로, 액정표시소자의 기판의 일부영역위에 행방향 구조가 n+-i-n+인 반도체 저항(RTemp)을 구비하여 반도체 저항의 온도에 따른 비저항 특성변화를 전기적 신호로 바꾸어 액정표시소자의 온도에 따른 변화를 보상함으로써 양질의 화상을 제공할 수 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature detection device for a liquid crystal display device, and includes a semiconductor resistor (R Temp ) having a row structure of n + -in + on a portion of a substrate of the liquid crystal display device, and has a resistivity characteristic according to the temperature of the semiconductor resistance. By converting the change into an electrical signal, it is possible to provide a good image by compensating for the change according to the temperature of the liquid crystal display.
Description
제1도는 온도 및 인가전압에 따른 액정의 광투과율을 도시한 그래프.1 is a graph showing the light transmittance of liquid crystals according to temperature and applied voltage.
제2도는 종래의 액정표시장치를 구동시키기 위한 구동회로의 구성블럭도.2 is a block diagram of a driving circuit for driving a conventional liquid crystal display device.
제3도는 본 발명에 의한 액정표시소자의 온도검출장치의 제1실시예를 도시한 회로도.3 is a circuit diagram showing a first embodiment of the temperature detection device of the liquid crystal display device according to the present invention.
제4도는 제4도의 온도감지저항의 단면도.4 is a cross-sectional view of the temperature sensing resistor of FIG.
제5도는 비정질 실리콘의 온도에 따른 온도감지저항의 비저항 변화를 도시한 그래프.5 is a graph showing the change in the resistivity of the temperature sensing resistance according to the temperature of amorphous silicon.
제6도는 본 발명에 의한 액정표시소자의 온도검출장치의 제2실시예를 도시한 회로도.6 is a circuit diagram showing a second embodiment of the temperature detection device of the liquid crystal display device according to the present invention.
제7도는 제6도의 전압에 따른 전류의 변화를 도시한 동작특성 그래프.FIG. 7 is an operating characteristic graph showing a change in current according to the voltage of FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
11,31 : 온도감지 저항부 12,32 : 전기신호 생성부11,31: temperature sensing resistance unit 12,32: electric signal generating unit
20 : 반도체 기판 21 : 절연성 비정질 실리콘층20: semiconductor substrate 21: insulating amorphous silicon layer
22 : n+형 비정질 실리콘층 23 : 금속전극22: n + type amorphous silicon layer 23: metal electrode
24 : 보호막24: protective film
본 발명은 액정표시장치에 관한 것으로, 특히 액정표시소자의 온도를 검출하여 온도에 따른 특성변화를 보상하도록 하는 액정표시소자의 온도검출장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a temperature detection device of a liquid crystal display device which detects a temperature of the liquid crystal display device and compensates for a characteristic change according to temperature.
액정표시장치는 액체의 유동성과 결정의 광학적 성질을 겸비한 액체와 고체의 중간적 성질을 갖는 액정의 광학적 이방성을 변화시켜 화상을 표시하는 것으로, 제1도에 도시한 바와 같이 통상의 액정표시소자에서 동일한 전압이 인가되는 경우 소정구간에서 20℃의 액정의 광투과율이 가장 높은 것으로 볼 수 있으며, 또한 동작온도에 따라 액정의 광투과율이 변화하는 것을 볼 수 있다.A liquid crystal display device displays an image by changing the optical anisotropy of a liquid crystal having an intermediate property between a liquid and a solid having a liquidity and an optical property of a crystal. As shown in FIG. When the same voltage is applied, it can be seen that the light transmittance of the liquid crystal at 20 ° C. is the highest in a predetermined period, and the light transmittance of the liquid crystal is changed according to the operating temperature.
그러나 종래에는 제2도에 도시한 바와같이 온도의 변화에 의한 액정의 광투과율의 변화를 고려하지 않고, 단지 휘도조절저항(R)을 수동적으로 조절하여 전압을 분배하고, 이를 색구동회로(9)에 인가하여 R(Red), G(Green), B(Blue) 신호출력 진폭을 조절함으로써 제어기(7)를 통하여 영상신호 구동회로(3,3')와 게이트 구동회로(5)를 제어하여 액정판(1)을 통해 화상이 표시되도록 하였다.However, conventionally, as shown in FIG. 2, without considering the change in the light transmittance of the liquid crystal due to the change in temperature, only by manually adjusting the luminance control resistor R, the voltage is distributed, and the color driving circuit 9 By controlling the signal output amplitude of R (Red), G (Green), B (Blue) by controlling the signal output circuit, the video signal driving circuits 3, 3 'and the gate driving circuit 5 are controlled through the controller 7. An image was displayed through the liquid crystal plate 1.
즉, 종래에는 시간이나 주변온도에 따라 휘도보상을 목적으로 수동적으로 조절저항을 가변시키면서 적당한 화상을 선택하도록 함으로써 사용이 매우 번거롭고 정확도가 떨어지게 되어 최적의 화상을 나타내지 못하는 문제점이 있다.That is, in the related art, by selecting a suitable image while manually adjusting the adjustment resistor for the purpose of luminance compensation according to time or ambient temperature, the use is very cumbersome and the accuracy is low, and thus there is a problem in that the optimal image is not displayed.
따라서 본 발명의 목적은 상기와 같은 문제점을 해결하기 위하여, 액정표시소자의 일부영역에 온도를 감지할 수 있는 온도감지저항부를 내장함으로써 온도변화에 대한 액정의 변화를 자동적으로 검출하여 최적의 화질을 구현할 수 있는 액정표시소자의 온도검출장치를 제공하는 것이다.Accordingly, an object of the present invention is to solve the above problems, by embedding a temperature sensing resistor that can sense the temperature in a portion of the liquid crystal display device to automatically detect the change in the liquid crystal against the temperature change to obtain the optimum image quality. It is an object of the present invention to provide a temperature detecting device for a liquid crystal display device.
상기 목적을 달성하기 위하여 본 발명은 액정표시소자의 판넬일부영역에 형성되어 온도변화를 감지하기 위한 온도감지저항부와, 상기 온도감지저항부의 온도에 따른 저항값의 변화에 따라 감지된 온도를 전기적 신호로 변화시켜주는 전기신호생성부로 구성되는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a temperature sensing resistor unit formed in a portion of a panel of a liquid crystal display device for sensing a temperature change, and a temperature sensed according to a change in a resistance value according to a temperature of the temperature sensing resistor unit. Characterized in that it consists of an electrical signal generation unit that changes the signal.
이하, 첨부도면을 참조하여 본 발명을 좀더 상세하게 설명하고자 한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
제3도는 본 발명에 의한 액정표시소자의 온도검출장치의 제1실시예의 회로도로서, 액정표시소자의 판넬상에 온도감지저항부(11)를 형성하고, 전기신호생성부(12)인 입력단의 일측이 접지된 오피앰프(OP)에서 전류(Iref)가 인가되는 타측입력단과 출력단 사이에 상기 온도감지저항부(11)의 온도감지저항(RTemp)을 연결하여 구성함으로써 , 온도의 변화에 따라 저항값(RTemp)을 전압(VTemp: VTemp= RTemp×Iref)으로 바꾸어 준다.3 is a circuit diagram of a first embodiment of a temperature detection device for a liquid crystal display device according to the present invention, in which a temperature sensing resistor section 11 is formed on a panel of a liquid crystal display device, and the electrical signal generating section 12 is used as an input terminal. By connecting the temperature sensing resistor R Temp of the temperature sensing resistor 11 between the other input terminal and the output terminal to which the current Iref is applied in the op amp OP grounded at one side thereof, according to the change of temperature Change the resistance value (R Temp ) to the voltage (V Temp : V Temp = R Temp × Iref).
이때 상기 온도감지저항(RTemp)은 제4도에 도시한 바와 같이 반도체기판(20)의 소정영역에 형성된 절연형 비정질 실리콘층(21)과, 상기 절연형 비정질 실리콘층(21)의 일부영역에 형성된 n+형 비정질 실리콘층(22)으로 n+-i(insulate)-n+구조를 갖도록 형성되며, 상기 온도감지저항(RTemp)의 측부에는 외부와의 연결을 위해 알루미늄(A1)과 같은 금속으로 형성된 금속전극(23)과, 상기 온도감지저항과 금속전극(23)을 보호하기 위해 소정두께로 형성된 보호막(24)이 형성되어 있다.In this case, as shown in FIG. 4, the temperature sensing resistor R Temp is an insulating amorphous silicon layer 21 formed in a predetermined region of the semiconductor substrate 20 and a partial region of the insulating amorphous silicon layer 21. The n + type amorphous silicon layer 22 formed in the n + -i (insulate) -n + structure is formed on the side of the temperature sensing resistor (R Temp ) and the aluminum (A1) and for connection to the outside A metal electrode 23 formed of the same metal and a protective film 24 formed to a predetermined thickness to protect the temperature sensing resistor and the metal electrode 23 are formed.
그리고 상기 비정질 실리콘은 제5도에 도시한 바와같이 비저항 특성(=exp(Ea/KT),: 비저항, : 비례상수, K : 볼쯔만 상수, T : 온도, Ea : 비정질 실리콘의 활성화 에너지)을 가지며, 이러한 온도 의존 특성에 의해 25℃와 75℃에서의 비정질 실리콘의 비저항은 상기 비정질 실리콘의 활성화 에너지인 Ea가 약0.6eV일 때 1:30이 된다.The amorphous silicon has a resistivity characteristic as shown in FIG. ( = exp (Ea / KT), : Resistivity, : Proportionality constant, K: Boltzmann constant, T: temperature, Ea: activation energy of amorphous silicon), and the specific resistance of amorphous silicon at 25 ° C and 75 ° C is the activation energy of the amorphous silicon It becomes 1:30 when Ea is about 0.6 eV.
또한 상기 온도감지저항은 박막트랜지스터(TFT: Thin Film Transistor)와 동일하게 만들어지거나 또는 박막트랜지스터 구조에서 게이트 금속층이 없는 단순저항 구조로 만들어지며, 상기 온도감지저항이 온도의 변화에 따라 변화하면, 상기 오피앰프(OP)의 출력전압이 그에 비례하여 변화하고, 이 전압신호는 다시 용도에 적당한 전압으로 증폭되거나 변환시켜 사용된다.In addition, the temperature sensing resistance is made of the same as a thin film transistor (TFT) or made of a simple resistance structure without a gate metal layer in the thin film transistor structure, and if the temperature sensing resistance changes with temperature change, the The output voltage of the operational amplifier OP changes in proportion thereto, and this voltage signal is again amplified or converted to a voltage suitable for the purpose of use.
제6도는 본 발명에 의한 온도검출장치의 제2실시예의 회로도로서, 게이트가 드레인과 연결되고 소오스가 접지된 비정질 실리콘 박막트랜지스터(T)로 구성된 전기신호 생성부(32)와, 상기 비정질 실리콘 박막트랜지스터(T)의 드레인과 전원전압(VD:1V~2V)사이에 액정표시소자 판넬면에 형성한 온도감지저항부(31)의 온도감지저항(RTemp)을 연결하여 구성되며, 제7도에 도시한 바와같은 동작 특성을 나타내도록 하였다.6 is a circuit diagram of a second embodiment of a temperature detection apparatus according to the present invention, wherein an electrical signal generator 32 comprising an amorphous silicon thin film transistor T having a gate connected to a drain and a source grounded therein, and the amorphous silicon thin film. The temperature sensing resistor R Temp of the temperature sensing resistor 31 formed on the liquid crystal display panel is connected between the drain of the transistor T and the power supply voltage V D : 1V to 2V. The operation characteristic as shown in FIG.
예를 들어 온도가 T1에서 T2로 변하게 되면, T1에서의 전류와 T2에서의 전류 I2 도 온도에 따라 달라짐으로써 출력전압 Vout(T1), Vout(T2)이 변하게 되어 액정표시소자의 온도에 따른 변화를 보상해 준다.For example, if the temperature changes from T 1 to T 2 , the current at T 1 And current at T 2 I 2 As the temperature varies depending on the temperature, the output voltages Vout (T 1 ) and Vout (T 2 ) are changed to compensate for the change according to the temperature of the liquid crystal display.
따라서, 본 발명에 의하면 외부에서 별개의 온도감지소자를 사용하지 않고 박막트랜지스터의 제조시 동시에 온도감지저항부를 제조하여 상기 온도감지저항부를 통해 자동적으로 온도를 감지한후 온도보상처리함으로써 온도보상이 매우 간단하며, 액정표시장치의 배경광(back light)의 온도 의존 특성을 해결하는데도 매우 유용하게 되는 효과가 있다.Therefore, according to the present invention, at the same time manufacturing a thin film transistor without using a separate temperature sensing element from the outside, the temperature sensing resistor is manufactured and the temperature is automatically compensated by the temperature sensing resistor to compensate for the temperature. It is simple and has the effect of being very useful in solving the temperature dependent characteristics of the back light of the liquid crystal display.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930022651A KR0121151B1 (en) | 1993-10-28 | 1993-10-28 | Temperature detecting device of liquid crystal display elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930022651A KR0121151B1 (en) | 1993-10-28 | 1993-10-28 | Temperature detecting device of liquid crystal display elements |
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| Publication Number | Publication Date |
|---|---|
| KR950012104A KR950012104A (en) | 1995-05-16 |
| KR0121151B1 true KR0121151B1 (en) | 1997-11-18 |
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| KR1019930022651A Expired - Lifetime KR0121151B1 (en) | 1993-10-28 | 1993-10-28 | Temperature detecting device of liquid crystal display elements |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100965585B1 (en) * | 2003-12-27 | 2010-06-23 | 엘지디스플레이 주식회사 | Liquid crystal display and its temperature sensing method |
| 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100306491B1 (en) * | 1999-07-24 | 2001-09-13 | 신형인 | Composition for Thermoplastic Elastomer Blending with Ionomer EPDM base |
-
1993
- 1993-10-28 KR KR1019930022651A patent/KR0121151B1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100965585B1 (en) * | 2003-12-27 | 2010-06-23 | 엘지디스플레이 주식회사 | Liquid crystal display and its temperature sensing method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR950012104A (en) | 1995-05-16 |
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