KR0121717Y1 - Lcd's tomperature compensation device - Google Patents
Lcd's tomperature compensation deviceInfo
- Publication number
- KR0121717Y1 KR0121717Y1 KR2019950014172U KR19950014172U KR0121717Y1 KR 0121717 Y1 KR0121717 Y1 KR 0121717Y1 KR 2019950014172 U KR2019950014172 U KR 2019950014172U KR 19950014172 U KR19950014172 U KR 19950014172U KR 0121717 Y1 KR0121717 Y1 KR 0121717Y1
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- Prior art keywords
- voltage
- temperature
- liquid crystal
- resistor
- crystal display
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- 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
- G09G3/367—Control of matrices with row and column drivers with a nonlinear element in series with the liquid crystal cell, e.g. a diode, or M.I.M. element
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- 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
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
본 고안은 액정 디스플레이의 온도 보정 회로에 관한 것으로, 특히 액정 디스플레이의 온도 보정 회로를 채용하여 온도가 상승하더라도 밝기 조절 전압이 떨어지지 않도록 한 액정 디스플레이의 온도 보정회로에 관한 것이며, 디스플래이 액정 장치의 구동 전압을 조절하기 위한 구동 전압 조정부, 액정 디스플레이 장치의 온도의 변화에 따라서 출력되는 전위가 결정되는 온도-전압 변환부, 온도 전압 변환부에 의해서 액정 디스플레이 장치의 구동 전압의 변동분을 결정하고, 상기 구동 전압 조정부의 출력 전압에 따라서 변동분을 보정하여 출력시키는 구동 전압 변환부를 구비함을 특징으로 하며, MIM 방식의 액정 디스플레이를 사용한 기기가 온도 상승에 따라 판넬 구동 전압이 낮아져 화면의 밝기가 점차 어두워지는 것을 방지하여 온도 상승에 따른 밝기 조절 전압 변화를 방지할 수 있는 잇점이 있다.The present invention relates to a temperature correction circuit of a liquid crystal display, and more particularly, to a temperature correction circuit of a liquid crystal display in which a brightness control voltage does not drop even when the temperature is increased by employing a temperature correction circuit of the liquid crystal display. A driving voltage adjusting unit for adjusting a voltage, a temperature-voltage converter for determining an output potential according to a change in temperature of the liquid crystal display device, and a change in the driving voltage of the liquid crystal display device by a temperature voltage converter, It is characterized in that it comprises a drive voltage conversion unit for correcting the output according to the output voltage of the adjustment unit, the device using the MIM-type liquid crystal display is lowered the panel drive voltage as the temperature rises to prevent the brightness of the screen is gradually darkened Due to temperature rise There is an advantage that can prevent the brightness adjustment voltage change.
Description
제1도는 종래의 액정 디스플레이 구동 전압 공급 회로도.1 is a conventional liquid crystal display driving voltage supply circuit diagram.
제2도는 본 고안의 액정 디스플레이의 온도 보정 회로의 블록도.2 is a block diagram of a temperature correction circuit of the liquid crystal display of the present invention.
제3도는 제2도의 블록도 각부의 상세한 회로도.3 is a detailed circuit diagram of each block diagram of FIG.
*도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
D:다이오드 R1,R2,R3,R4,R5,R6:저항D: Diodes R1, R2, R3, R4, R5, R6: Resistance
Q1,Q2,Q3,Q4:트랜지스터 VR1:가변저항Q1, Q2, Q3, Q4: Transistor VR1: Variable resistor
본 고안은 액정 디스플레이의 온도 보정 회로에 관한 것으로, 특히 액정 디스플레이의 온도 보정 회로를 채용하여 온도가 상승하더라도 밝기 조절 전압이 떨어지지 않도록 한 액정 디스플레이의 온도 보정회로에 관한 것이다.The present invention relates to a temperature correction circuit of a liquid crystal display, and more particularly, to a temperature correction circuit of a liquid crystal display by adopting a temperature correction circuit of a liquid crystal display so that the brightness control voltage does not drop even when the temperature rises.
일반적으로 MIM(Mteal Insulator Metal)방식 액정 디스플레이로 화상을 표시하기 위해서 종래에는 제1도와 같이 부(-)의 전압을 발생시켜 이를 저항으로 분할하거나 가변 저항을 사용하여 전압을 조절함으로서 밝기 조절을 하였다. 즉 종래의 저항 분할 방식(1) 및 가변 저항을 이용한 방식(2)를 설명하면 제1도의 (1)방식은 부(-)의 전압을 인가하고 저항 R1과 R2의 분할 방식에 의한 적당한 분배 전압을 이용하거나, (2)방식처럼 R1,VR1,R2를 구비해서 가변저항(VR1)으로 출력전압을 조절하여 액정 디스플레이를 구동하게 하였다. 이렇게 구성된 종래의 MIM 액정 디스플레이의 판넬 온도 특성이 1℃마다 120mV 변화로 낮아지는 현상이 있기 때문에 부(-) 전압을 이용하게 되면 온도가 상승함에 따라 부(-)의 전압이 점차로 떨어져 화상을 표시할 때 화면이 점차로 어두워지는 현상이 생겼다.In general, in order to display an image with a MIM (Metal Insulator Metal) liquid crystal display, the brightness is controlled by generating a negative voltage and dividing it by a resistor as shown in FIG. 1 or by adjusting the voltage using a variable resistor. . In other words, the conventional resistance dividing method (1) and the method (2) using the variable resistor will be described. In the method (1) of FIG. Or R1, VR1, and R2 as shown in (2) to control the output voltage with the variable resistor VR1 to drive the liquid crystal display. Since the panel temperature characteristic of the conventional MIM liquid crystal display configured as described above is lowered by 120mV change every 1 ° C, when the negative voltage is used, the negative voltage gradually decreases as the temperature increases, thereby displaying an image. The screen gradually darkens when I do it.
따라서 본 고안의 목적은 상기와 같은 문제점을 해결하기 위하여 온도 보정 회로를 채용하여 액정 디스플레이의 온도 상승에 따른 판넬 구동 전압이 낮아지는 것을 방지하여 화면이 어두워지는 현상을 보정해주는 회로를 제공하는데 있다.Therefore, an object of the present invention is to provide a circuit for correcting the phenomenon that the screen is dark by preventing the panel driving voltage caused by the temperature rise of the liquid crystal display by using a temperature correction circuit to solve the above problems.
상기의 목적을 달성하기 위한 본 고안에 의한 액정 디스플레이 장치의 온도 변화를 보정하기 위한 온도 보정 회로에 있어서,In the temperature correction circuit for correcting the temperature change of the liquid crystal display device according to the present invention for achieving the above object,
상기 디스플래이 액정 장치의 구동 전압을 조절하기 위한 구동 전압 조정부;A driving voltage adjusting unit for adjusting a driving voltage of the display liquid crystal device;
상기 액정 디스플레이 장치의 온도의 변화에 따라서 출력되는 전위가 결정되는 온도-전압 변환부; 상기 온도 전압 변환부에 의해서 액정 디스플레이 장치의 구동 전압의 변동분을 결정하고, 상기 구동 전압 조정부의 출력 전압에 따라서 변동분을 보정하여 출력시키는 구동 전압 변환부를 구비함을 특징으로 한다.A temperature-voltage converter configured to determine an output potential according to a change in temperature of the liquid crystal display device; And a driving voltage converting unit configured to determine a change in the driving voltage of the liquid crystal display by the temperature voltage converting unit, and correct and output the change in accordance with the output voltage of the driving voltage adjusting unit.
이하에서 첨부한 도면을 참조하여 본 고안의 실시예를 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
제2도는 본 고안의 액정 디스플레이의 온도 보정 회로의 블록도이며, 온도의 변화를 전압으로 변환하는 온도-전압 변환부(100)와, 부(-)의 전압을 보정하여 판넬 구동 전압을 출력하는 구동전압 변환부(200)와, 구동 전압을 조절하는 구동 전압 조정부로 구성되어 있다.2 is a block diagram of a temperature correction circuit of a liquid crystal display according to the present invention, and includes a temperature-voltage converter 100 for converting a change in temperature into a voltage and a panel driving voltage for correcting a negative voltage. The driving voltage converting unit 200 and the driving voltage adjusting unit for adjusting the driving voltage are configured.
제3도는 제2도의 블록도 각부의 상세한 회로도이며, 입력단에 전원(VCC)가 인가되고 직렬로 N개 연결된 다이오드(D)와 직렬로 접속된 저항(R1)으로 이루어진 온도전압 변환부(100)와, 상기 다이오드(D)와 저항(R1)의 중간점에 베이스가 접속되고 전원이 인가된 저항(R2)에 에미터가 접속된 트랜지스터(Q1)과 상기 저항(R(3,R4)의 중간점에 베이스가 연결되고 에미터가 저항(R2)에 연결된 트랜지스터(Q2)와, 베이스가 상기 트랜지스터(Q1)의 콜렉터에 연결되고 에미터가 부전압이 인가되는 상기 트랜지스터(Q2)의 콜렉터에 연결되고 콜렉터가 구동 전압이 인가되는 상기 저항(R4)에 연결되는 트랜지스터(Q4)로 이루어진 구동전압 변환부(200)와, 직렬로 접속된 저항(R5)와 저항(R6) 및 가변저항(VR1)과, 베이스를 가변저항(VR1)에 연결하고 에미터를 직렬인 저항(R3)와 (R4)에 접속하는 트랜지스터(Q3)로 이루어진 구동 전압 조정부로 구성된다.FIG. 3 is a detailed circuit diagram of each block diagram of FIG. 2 and includes a temperature voltage converter 100 including a resistor R1 connected in series with a diode D connected in series with a power supply VCC applied to an input terminal. And a middle of the transistor Q1 and the resistor R (3, R4) having a base connected to the midpoint of the diode D and the resistor R1 and an emitter connected to a resistor R2 to which power is applied. A transistor connected to the base and an emitter connected to the resistor R2, and a base connected to the collector of the transistor Q1, and an emitter connected to the collector of the transistor Q2 to which a negative voltage is applied. And a collector voltage converter 200 formed of a transistor Q4 connected to the resistor R4 to which a collector is applied with a driving voltage, a resistor R5 and a resistor R6 and a variable resistor VR1 connected in series. Connect the base to variable resistor VR1 and the emitter to series resistors R3 and R4. It is composed of a driving voltage adjustment consisting of a transistor (Q3).
따라서 본 고안의 구체적인 실시예를 제2도와 제3도를 참조하여 상세히 설명한다.Therefore, specific embodiments of the present invention will be described in detail with reference to FIGS. 2 and 3.
제3도에서 +5V전원(VCC)이 다이오드(D)의 입력단에 인가되면 07V의 전압 강하가 생긴다. 따라서 다이오드(D)는 4개가 직렬로 접속되어 상온에서 0.7×4=2.8V가 전압 강하되며, 다이오드(D)와 저항(R1)의 중간점인 (a)에는 2.2.V의 전위로 나타난다. 따라서 트랜지스터(Q1)은 온(ON)이 되고 베이스와 에미터간의 전압(Vbe)를 거친 (b)점에는 2.9V가 되며, 이로 인하여 트랜지스터(Q2)도 온(ON)이되어 베이스 접속점(d)에는 2.2V의 전위가 된다. 저항(R5)와 (R6)로 분압되어진 전압이 가변저항(VR1)에 의하여 트랜지스터(Q3)의 베이스에 전압이 인가되면 트랜지스터(Q3)는 온되어 베이스보다 0.7V 떨어진 전압이 트랜지스터(Q3)의 에미터 접속점이 (c)점에 나타난다. 여기서(f)점에 부(-)의 전압이 공급되면 트랜지스터(Q1)의 전류가 트랜지스터(Q4)의 베이스에 인가되므로 트랜지스터(Q4)는 온이 되어 (f)점의 부(-)의 전압이 (e)점으로 전달되며, (e)점의 전압은 부(-)의 전압에서 저항(R4)의 전압 강하를 뺀 전압값이 나타난다. 이 전압이 판넬 구동 전압이 된다. 여기서 MIM(Metal Insulator Metal)방식의 판넬 특성은 1℃마다 120mV가 낮아지는데, 만약 판넬 온도가 상승하면 다이오드(D)의 온도 특성(1℃마다 2mV가 낮아짐)에 의해 (a)점의 전위는 점차로 상승하게 되고 (d)점의 전위도 따라서 상승하게 된다. (d)점의 전위에 의하여 (c)와 (d)점에 흐르는 전류가 감소하며 그 결과 (e)점의 전위는 상승하게 된다. 따라서 (e)점으로 입력되는 부(-)의 전압이 온도 상승에 의해 변화하더라도 그 변동치를 다이오드(D)로 검출하여 그 변화된 전압 값을 (d)점에 나타내어 이 전압 값에 의한 저항(R4)의 전압 강하치와 (f)점의 인가된 부(-)의 전압과 상쇄되어 보정된 전압이 최종(e)점의 전압이 되어 판넬이 구동된다.In FIG. 3, when the + 5V power supply VCC is applied to the input terminal of the diode D, a voltage drop of 07V occurs. Therefore, four diodes D are connected in series so that a voltage drop of 0.7 × 4 = 2.8V is obtained at room temperature, and a potential of 2.2.V appears at (a), which is the midpoint between the diode D and the resistor R1. Therefore, the transistor Q1 is turned ON and becomes 2.9 V at the point (b) passing through the voltage Vbe between the base and the emitter. As a result, the transistor Q2 is turned ON and the base connection point d ) Has a potential of 2.2V. When the voltage divided by the resistors R5 and R6 is applied to the base of the transistor Q3 by the variable resistor VR1, the transistor Q3 is turned on so that the voltage of 0.7 V away from the base is lower than that of the transistor Q3. The emitter junction is shown at point (c). If a negative voltage is supplied at the point (f), the current of the transistor Q1 is applied to the base of the transistor Q4, so that the transistor Q4 is turned on and the negative voltage at the point (f) is applied. This voltage is transmitted to the point (e), and the voltage at the point (e) is a negative voltage minus the voltage drop of the resistor R4. This voltage becomes the panel drive voltage. Here, the panel characteristics of the metal insulator metal (MIM) method are lowered by 120mV per 1 ℃. If the panel temperature rises, the potential at point (a) is reduced by the temperature characteristics of the diode D (2mV decreases per 1 ℃). It gradually rises and the potential at point (d) also rises accordingly. The electric current flowing in points (c) and (d) decreases by the potential of point (d), and as a result, the potential of point (e) increases. Therefore, even if the negative voltage inputted to the point (e) changes due to the temperature rise, the change is detected by the diode D, and the changed voltage value is indicated at the point (d) so that the resistance (R4) due to this voltage value is obtained. The voltage is corrected by offsetting the voltage drop value of) and the applied negative voltage of point (f) to the voltage of the final point (e), and the panel is driven.
제3도에 도시한 바와 같이 온도-전압 변환 수단인 다이오드(D)는 더어미스터(온도 보상 저항)로도 구성할 수도 있다. 즉 더어미스터를 사용할 시 온도 상승에 따라 (a)점의 전압이 상승하므로 (d)점의 전압 상승에 의해 전류가 제어되고 (e)점의 전위는 상승하게 된다. 이 때문에 온도가 상승하게 되면 판넬 구동 전압이 낮아지는 현상을 보정할 수 있다.As shown in Fig. 3, the diode D, which is a temperature-voltage converting means, may also be configured as a thermistor (temperature compensation resistor). That is, when thermistor is used, the voltage at point (a) increases as the temperature rises, so the current is controlled by the voltage rise at point (d), and the potential at point (e) increases. Therefore, when the temperature rises, the phenomenon that the panel driving voltage decreases can be corrected.
상술한 바와 같이 본 고안에 의하면, MIM 방식의 액정 디스플레이를 사용한 기기가 온도 상승에 따라 판넬 구동 전압이 낮아져 화면의 밝기가 점차 어두워지는 것을 방지하여 온도 상승에 따른 밝기 조절 전압 변화를 방지할 수 있는 잇점이 있다.As described above, according to the present invention, a device using a MIM-type liquid crystal display may prevent the brightness of the screen from being gradually darkened due to a lower panel driving voltage as the temperature increases, thereby preventing a change in the brightness control voltage due to the temperature increase. There is an advantage.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019950014172U KR0121717Y1 (en) | 1995-06-21 | 1995-06-21 | Lcd's tomperature compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019950014172U KR0121717Y1 (en) | 1995-06-21 | 1995-06-21 | Lcd's tomperature compensation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970002903U KR970002903U (en) | 1997-01-24 |
| KR0121717Y1 true KR0121717Y1 (en) | 1998-08-17 |
Family
ID=19416105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019950014172U KR0121717Y1 (en) | 1995-06-21 | 1995-06-21 | Lcd's tomperature compensation device |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0121717Y1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100484099B1 (en) * | 2000-02-09 | 2005-04-19 | 삼성에스디아이 주식회사 | Power supply for plasma display panel |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990071047A (en) * | 1998-02-26 | 1999-09-15 | 윤종용 | Temperature control device of display device and its method |
| KR100303545B1 (en) * | 1999-10-22 | 2001-11-02 | 김순택 | Power voltage controlling circuit of liquid crystal display |
-
1995
- 1995-06-21 KR KR2019950014172U patent/KR0121717Y1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100484099B1 (en) * | 2000-02-09 | 2005-04-19 | 삼성에스디아이 주식회사 | Power supply for plasma display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| KR970002903U (en) | 1997-01-24 |
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