KR950012105A

KR950012105A - Contrast Control Circuit of Display Unit

Info

Publication number: KR950012105A
Application number: KR1019930022932A
Authority: KR
Inventors: 강우식
Original assignee: 김광호; 삼성전자 주식회사
Priority date: 1993-10-30
Filing date: 1993-10-30
Publication date: 1995-05-16

Abstract

본 발명은 표시장치의 명암조절회로에 관한 것으로, 특히 키 조작에 의한 액정표시장치의 명암조절회로에 관한 것이다.The present invention relates to a contrast control circuit of a display device, and more particularly to a contrast control circuit of a liquid crystal display device by a key operation.

액정표시장치가 외부환경에 명암의 밝기조절값이 변하고, 사용자가 원하는 명암의 밝기를 단계적으로 조절하는 문제를 해결함에 있어서, 명암에 관련된 신호를 발생하는 입력수단으로부터 발생한 명암조절신호에 대하여 제어수단은 상기 명암조절신호에 대응한 명암조절값을 표시장치의 부전원 공급수단에 전송한다. 상기 표시장치 부전원 공급수단은 상기 명암조절값에 대응된 부전원을 표시장치 구동부에 전송함으로서, 상기 표시장치 구동부는 표시장치를 구동하기 위한 구동신호를 표시장치에 출력한다. 이에 상기 표시장치는 상기 구동신호에 응답하여 조절된 명암의 밝기를 나타낸다.In solving the problem in which the brightness control value of the contrast changes to the external environment and the brightness of the contrast desired by the user in steps, the liquid crystal display device controls the contrast control signal generated from the input means for generating a signal related to the contrast. Transmits the contrast adjustment value corresponding to the contrast adjustment signal to the sub power supply means of the display device. The display device sub-power supply means transmits the sub-power corresponding to the contrast control value to the display device driver, so that the display device driver outputs a drive signal for driving the display device to the display device. Accordingly, the display device displays the brightness of the contrast adjusted in response to the driving signal.

Description

Contrast Control Circuit of Display Unit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 1 도는 가변저항을 이용한 종래의 LCD의 명암조절회로도,1 is a contrast control circuit diagram of a conventional LCD using a variable resistor,

제2도는 본 발명에 따른 LCD의 명암조절 회로의 블럭도,2 is a block diagram of a contrast control circuit of an LCD according to the present invention;

제 3 도는 제 2 도에 도시된 일 실시예에 적용되는 LCD 부전원 공급부(16)의 구체 회로도,FIG. 3 is a detailed circuit diagram of the LCD sub power supply 16 applied to the embodiment shown in FIG.

제 4 도는 본 발명에 따른 명암의 밝기조절을 위한 제어 흐름도.4 is a control flowchart for adjusting the brightness of the contrast according to the present invention.

Claims

A contrast control circuit of a display device that displays brightness of a contrast in accordance with a drive signal, comprising: an input means for generating a contrast control command signal and a contrast adjustment value set in response to a contrast control command signal input from the input means; And a display device driving means for converting an analog signal by receiving a control means and a contrast control value generated from the control means to generate a drive signal of the display device.

2. The contrast control circuit of claim 1, wherein the input means generates a key command signal for brightening the contrast and a key command signal for darkening the brightness.

2. The contrast control circuit of claim 1, wherein the control means generates a contrast adjustment value set by a predetermined program in response to a contrast control signal input from the input means.

2. The contrast control circuit of claim 1, wherein the control means generates a contrast adjustment value set by counting in response to the adjustment signal of the contrast input from the input means.

2. The display device driving apparatus according to claim 1, wherein the display device driving means includes a liquid crystal display device sub-power supply means for receiving a contrast adjustment value generated from the control means and supplying a sub-power converted into an analog signal; And a liquid crystal display device driving means for receiving a sub-power supplied from the means and outputting a driving signal of the display device.

2. The contrast control circuit of claim 1, wherein the display device comprises a liquid crystal display device.

A contrast control circuit of a display device that displays brightness of a contrast according to a drive signal, comprising: input means for generating a contrast control command signal by an external contrast control command signal recognized by an external sensor, and a contrast control command input from the input means; And control means for generating a contrast control value set corresponding to the signal, and a display device driving means for generating a drive signal of the display device by converting the contrast control value generated from the control means into an analog signal. Contrast control circuit of display device.

The contrast control circuit of claim 7, wherein the input unit generates, by an external sensor, a contrast control command signal for brightening the brightness and a contrast control command signal for darkening the brightness.

8. The contrast control circuit according to claim 7, wherein the control means generates a contrast adjustment value set by a predetermined program in response to a contrast control signal input from the input means.

8. The contrast control circuit according to claim 7, wherein the control means generates a contrast adjustment value set by counting in response to an adjustment signal of the contrast input from the input means.

The display device driving means of claim 7, wherein the display device driving means receives a contrast adjustment value generated from the control means and supplies a sub power source converted into an analog signal, and the display unit sub power supply. And a liquid crystal display device driving means for receiving a sub-power supplied from the means and outputting a driving signal of the display device.

8. The contrast control circuit of claim 7, wherein the display device comprises a liquid crystal display device.

※ Note: The disclosure is based on the initial application.