KR960001808A - Gray level adjustment circuit - Google Patents

Gray level adjustment circuit Download PDF

Info

Publication number
KR960001808A
KR960001808A KR1019940012385A KR19940012385A KR960001808A KR 960001808 A KR960001808 A KR 960001808A KR 1019940012385 A KR1019940012385 A KR 1019940012385A KR 19940012385 A KR19940012385 A KR 19940012385A KR 960001808 A KR960001808 A KR 960001808A
Authority
KR
South Korea
Prior art keywords
reference voltage
operational amplifier
terminal
gray level
output
Prior art date
Application number
KR1019940012385A
Other languages
Korean (ko)
Inventor
여정범
Original Assignee
이헌조
엘지전자 주식회사
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.)
Filing date
Publication date
Application filed by 이헌조, 엘지전자 주식회사 filed Critical 이헌조
Priority to KR1019940012385A priority Critical patent/KR960001808A/en
Publication of KR960001808A publication Critical patent/KR960001808A/en

Links

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

본원 발명은 디지탈방식을 이용하여 기준전압을 공급하는 박막트랜지스터 액정표시장치(Thin film Transistor-Liquid Crystal Display) 구동용으로 사용하는 그레이레벨 조정회로에 관한 것으로서, 입력전압을 분압하는 입력레벨조정부와, 상기 입력레벨조정부에서 분압된 전압을 제1저항을 통해 (-)단자로 입력받는 제1연산증폭기와, 기준전압을 설정하여 상기 제1연산증폭기 (+)단자로 출력하는 기준전압공급부와, 상기 제1연산증폭기의 출력을 입력받아 전류를 증가시켜 출력하는 전류버퍼회로부와, 상기 제1연산증폭기의 (-)단자와 상기 전류버퍼회로부의 출력단자 사이에 연결된 제2저항으로 구성되고, 하나의 기준전압공급부에서 디지탈 방식으로 모든 그레이레벨회로에 기준전압을 입력시키기 때문에 부품수가 줄어서 생산성을 향상시키는 동시에 정밀한 조정이 가능한 잇점이 있는 것을 특징으로 한다.The present invention relates to a gray level adjustment circuit used for driving a thin film transistor liquid crystal display device for supplying a reference voltage using a digital method, comprising: an input level adjustment unit for dividing an input voltage; A first operational amplifier configured to receive the voltage divided by the input level controller through a first resistor through a negative terminal; a reference voltage supply unit configured to set a reference voltage and output the reference voltage to the first operational amplifier (+) terminal; A current buffer circuit unit which receives the output of the first operational amplifier and increases the current and outputs the first buffer amplifier; and a second resistor connected between the negative terminal of the first operational amplifier and the output terminal of the current buffer circuit unit. Since the reference voltage is inputted to all gray level circuits digitally from the reference voltage supply part, the number of parts is reduced, thereby improving productivity and at the same time adjusting precision. It characterized in that there are possible advantages.

Description

그레이레벨 조정회로Gray level adjustment circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 종래 기술에 의한 아날로그방식 그레이레벨 조정회로도,1 is an analog gray level adjustment circuit diagram according to the prior art,

제2도는 본원 발명에 의한 디지탈방식 그레이레벨 조정회로도,2 is a digital gray level adjustment circuit diagram according to the present invention;

제3도는 그레이레벨의 파형도.3 is a waveform diagram of gray level.

Claims (2)

입력전압을 분압하는 입력레벨조정부와, 상기 입력레벨조정부에서 분압된 전압을 제1저항을 통해 (-)단자로 입력받는 제1연산증폭기와, 기준전압을 설정하여 상기 제1연산증폭기의 (+)단자로 출력하는 기준전압공급부와, 상기 제1연산증폭기의 출력을 입력받아 전류를 증가시켜 출력하는 전류버퍼회로부와, 상기 제1연산증폭기의 (-)단자와 상기 전류버퍼회로부의 출력단자 사이에 연결된 제2저항으로 구성된 것을 특징으로 하는 그레이레벨 조정회로.An input level adjusting unit for dividing an input voltage, a first operational amplifier receiving the voltage divided by the input level adjusting unit through a negative terminal through a first resistor, and a reference voltage, A reference voltage supply unit for outputting the terminal, a current buffer circuit unit for receiving the output of the first operational amplifier and increasing the current, and outputting a negative terminal of the first operational amplifier and an output terminal of the current buffer circuit unit. And a second resistor connected to the gray level adjusting circuit. 제1항에 있어서, 상기 기준전압공급부는 디지탈적인 입력전압을 제3저항을 통해 입력받는 기준전압원과, 상기 기준전압원의 출력전압을 (+)단자로 입력받는 동시에 출력전압이 (-)단자로 궤환되는 제2연산증폭기(32)로 구성된 것을 특징으로 하는 그레이레벨 조정회로.The reference voltage supply unit of claim 1, wherein the reference voltage supply unit receives a digital input voltage through a third resistor, receives an output voltage of the reference voltage source as a positive terminal, and simultaneously outputs a voltage as a negative terminal. Gray level adjustment circuit, characterized in that consisting of the second operation amplifier 32 is fed back. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940012385A 1994-06-02 1994-06-02 Gray level adjustment circuit KR960001808A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940012385A KR960001808A (en) 1994-06-02 1994-06-02 Gray level adjustment circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940012385A KR960001808A (en) 1994-06-02 1994-06-02 Gray level adjustment circuit

Publications (1)

Publication Number Publication Date
KR960001808A true KR960001808A (en) 1996-01-25

Family

ID=66685713

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940012385A KR960001808A (en) 1994-06-02 1994-06-02 Gray level adjustment circuit

Country Status (1)

Country Link
KR (1) KR960001808A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8060254B2 (en) 2006-06-20 2011-11-15 Samsung Electronics Co., Ltd. Method, apparatus, and medium for building grid map in mobile robot and method, apparatus, and medium for cell decomposition that uses grid map

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8060254B2 (en) 2006-06-20 2011-11-15 Samsung Electronics Co., Ltd. Method, apparatus, and medium for building grid map in mobile robot and method, apparatus, and medium for cell decomposition that uses grid map

Similar Documents

Publication Publication Date Title
JP2695981B2 (en) LCD drive power supply circuit
KR960024543A (en) LCD driving power supply
KR970066687A (en) Thin film transistor liquid crystal display
EP1860771A3 (en) Differential circuit, amplifier circuit; driver circuit and display device using those circuits
KR920003627A (en) Common Emitter Amplifier Operates from Multiple Power Supplies
JP2000047168A (en) Power circuit for liquid crystal
TW263581B (en) Driving circuit used in display apparatus and liquid crystal display apparatus using such driving circuit
KR960008666A (en) Display drive device
KR960001808A (en) Gray level adjustment circuit
KR100537886B1 (en) Thin-film transistor liquid crystal display with adjustable gate-on voltage waveform
KR970075972A (en) A driving device of a thin film transistor liquid crystal display device
KR100759343B1 (en) Lcd drive circuit
JPH1082978A (en) Lcd driving voltage generating circuit
KR940013190A (en) Drive circuit of display device
KR960003070A (en) Low power supply output driver
KR20020053577A (en) Liquid display having correcting circuit and power line in panel
JP2895306B2 (en) Video output circuit
KR100281059B1 (en) Wye driving circuit of liquid crystal display
KR930011105B1 (en) Common driver circuit
KR20050104757A (en) Gamma reference voltage generator and the driving ic and the driving method thereof
JP2823384B2 (en) Liquid crystal display panel drive device
JP2001117068A (en) Power source circuit for liquid crystal
KR20050113852A (en) Source driver with programmable gamma reference voltage generator and display device thereof
KR20070094374A (en) Common voltage generation circuit of liquid crystal display device
JP4582858B2 (en) Liquid crystal display

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application