KR970076458A - Multi-level display device of liquid crystal display panel - Google Patents

Multi-level display device of liquid crystal display panel Download PDF

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Publication number
KR970076458A
KR970076458A KR1019960014277A KR19960014277A KR970076458A KR 970076458 A KR970076458 A KR 970076458A KR 1019960014277 A KR1019960014277 A KR 1019960014277A KR 19960014277 A KR19960014277 A KR 19960014277A KR 970076458 A KR970076458 A KR 970076458A
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South Korea
Prior art keywords
gray level
arbitrary
gray
switching
demultiplexer
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KR1019960014277A
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Korean (ko)
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KR100215783B1 (en
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김준희
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구자홍
Lg 전자주식회사
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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
    • G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2230/00—Details of flat display driving waveforms
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns

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

Abstract

본 발명은 액정표시 판넬의 다계조 표시에 관한 것으로서, 특히 서로 다른 듀티(Duty)비를 갖는 전압 파형을 교번시키고 디지탈 데이타와 조합 함으로써 전압 소오스를 줄이면서 다계조를 표시할 수 있도록 한 것이다.The present invention relates to a multi-gradation display of a liquid crystal display panel. In particular, voltage waveforms having different duty ratios are alternated and combined with digital data so that multiple gradations can be displayed while reducing the voltage source.

이와 같은 본 발명은 소정의 비트로 입력되는 데이타중 임의 하위비트 데이타와 듀티비가 서로다르게 쉬프트되어 입력되는 임의 수의 교번듀티비신호를 논리화하여 스위칭 제어신호를 생성하는 보간제어부와, 상기 보간 제어부에 입력된 데이타중 임의 상위비트 데이타를 논리화하고 그 논리화된 값에 따라 입력 그레이레벨 전압중 두 기준전압 사이를 교번으로 선택하여 출력하는 그레이레벨 선택부와, 상기 보간제어부에서 얻어진 스위칭 제어신호에 따라 상기 그레이레벨 선택부에서 선택되어 얻어진 그레이레벨 전압을 교번으로 선택하여 출력하는 그레이레벨 출력부로 구성된다.The present invention includes an interpolation controller for generating a switching control signal by logically mapping an arbitrary number of alternating duty ratio signals input by shifting arbitrary lower bit data of data input with a predetermined bit to a different duty ratio, A gray level selector for alternately selecting and outputting two input reference gray level voltages according to the logical value of the input gray level data and outputting the switching control signal obtained by the interpolation control unit; And a gray level output unit for alternately selecting and outputting the gray level voltage selected and obtained by the gray level selection unit.

Description

액정표시 패널의 다계조 표시장치A multi-gradation display device of a liquid crystal display panel

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

제5도는 본 발명에 따른 액정표시 판넬의 다계조 표시장치의 일 실시예를 나타낸 구성도, 제6도는 제5도의 보간제어부의 세부 회로도, 제7도는 제5도의 그레이레벨 선택부의 세부 회로도, 제8도는 제5도의 그레이레벨 출력부의 세부 회로도, 제9도는 제6도에 따른 스위칭 제어신호의 타이밍도.FIG. 5 is a configuration diagram showing an embodiment of a multi-gradation display device of a liquid crystal display panel according to the present invention, FIG. 6 is a detailed circuit diagram of the interpolation control section of FIG. 5, 8 is a detailed circuit diagram of the gray level output portion of FIG. 5, and FIG. 9 is a timing chart of the switching control signal according to FIG.

Claims (9)

소정의 비트로 입력되는 데이타중 임의 하위비트 데이타와 듀티비가 서로다르게 쉬프트되어 입력되는 임의 수의 교번듀티비신호를 논리화하여 스위칭 제어신호를 생성하는 보간제어부와, 상기 보간제어부에 입력된 데이타중 임의 상위비트 데이타를 논리화하고 그 논리화된 값에 따라 입력 그레이레벨 전압중 두 기준전압 사이를 교번으로 선택하여 출력하는 그레이레벨 선택부와, 상기 보간제어부에서 얻어진 스위칭 제어신호에 따라 상기 그레이레벨 선택부에서 선택되어 얻어진 그레이레벨 전압을 교번으로 선택하여 출력하는 그레이레벨 출력부를 포함하여 이루어지는 것을 특징으로 하는 액정표시 패널의 다계조 표시장치.An interpolation control unit for generating a switching control signal by logicalizing an arbitrary number of alternating duty ratio signals input by shifting arbitrary lower bit data of data inputted with a predetermined bit differently from each other with different duty ratios; A gray level selection unit which performs logical operation on upper bit data and alternately selects and outputs between two reference gray levels of the input gray level voltages according to the logical value of the gray level selection signal and outputs the gray level selection signal according to the switching control signal obtained by the interpolation control unit; And a gray level output section for alternately selecting and outputting the gray level voltage obtained by selecting the gray level voltage obtained in step (a). 제1항에 있어서, 상기 보간제어부는 상기 입력 임의 하위비트와 이와 동일수로 입력되는 임의 교번튜티비신호를 각각 논리연산하여 출력하는 제1연산부와, 상기 제1연산부에서 얻어진 데이타를 논리화하여 스위칭 제어신호를 생성하는 제2연산부를 포함하여 이루어지는 것을 특징으로 하느 액정표시 판넬의 다계조 표시장치.The apparatus of claim 1, wherein the interpolation controller comprises: a first arithmetic unit for logically calculating an arbitrary lower-order bit and an arbitrary alternate-tone signal input thereto, and outputting the resultant data; And a second arithmetic unit for generating a switching control signal. The multi-gradation display apparatus of claim 1, 제1항에 있어서, 상기 그레이레벨 선택부는 입력된 임의 상위비트를 임의 비트로 역다중화하는 역다중화부와, 상기 역다중화부에서 얻어진 임의 비트값을 분배 논리화 및 반전하여 임의 갯수의 기준전압중 두 기준전압을 선택하도록 제어신호를 발생하는 논리제어부와, 상기 논리제어부에서 얻어진 각각의 제어신호에 따라 선택 스위칭되어 임의 개수의 기준전압중 레벨이 다른 두 기준전압을 선택출력하는 스위칭제어부를 포함하여 이루어지는 것을 특징으로 하는 액정표시 판넬의 다계조 표시장치.2. The apparatus of claim 1, wherein the gray level selector comprises: a demultiplexer for demultiplexing the inputted high order bits into arbitrary bits; and a demultiplexer for dividing and inverting the arbitrary bit values obtained in the demultiplexer, And a switching control section for selectively outputting two reference voltages, which are selectively switched according to the respective control signals obtained from the logic control section, to select two reference voltages having different levels from the arbitrary number of reference voltages, And a plurality of gradation display units. 제1항에 있어서, 상기 그레이레벨 출력부는 보간제어부에서 얻어진 스위칭 제어신호에 따라 교번으로 스위칭되어 상기 그레이레벨 선택부에서 선택된 레벨이 다른 두 기준전압을 교번으로 출력하는 수위칭소자를 이루어지는 것을 특징으로 하는 액정표시 판넬의 다계조 표시장치.The apparatus of claim 1, wherein the gray-level output unit is a switching unit that is alternately switched according to a switching control signal obtained by the interpolation control unit and alternately outputs two reference voltages having different levels selected by the gray-level selection unit A multi-gradation display device of a liquid crystal display panel. 제2항에 있어서, 상기 제1연산부는 상기 입력 임의 하위비트와 이에 동일수로 입력되는 임의 교번듀티비신호를 논리곱하여 출력하는 다수개의 논리곱소자로 이루어지는 것을 특징으로 하는 엑정표시 판넬의 다계조 표시장치.The apparatus as claimed in claim 2, wherein the first arithmetic unit comprises a plurality of logical multipliers for logically multiplying the input arbitrary lower bit and an arbitrary alternating duty ratio signal input thereto in the same number, Display device. 제2항에 있어서, 상기 제2연산부는 제1연산부에서 얻어진 데이타를 논리합하는 다수개의 논리합소자로 이루어지는 것을 특징으로 하는 액정표시 판넬의 다계조 표시장치.The multi-gradation display device of a liquid crystal display panel according to claim 2, wherein the second arithmetic section comprises a plurality of OR gates which logically combine the data obtained by the first arithmetic section. 제3항에 있어서, 상기 논리제어부는 역다중화부에서 얻어진 역다중화 값을 상호 두 비트씩 논리합하여 스위칭제어부에 제공하는 다수개의 논리합소자와, 상기 역다중화부에서 얻어진 역다중화값을 반전하여 스위칭 제어부에 제공하는 다수개의 인버터를 포함하여 이루어지는 것을 특징으로 하는 액정표시 판넬의 다계조 표시장치.4. The apparatus of claim 3, wherein the logic controller comprises: a plurality of OR gates that logically combine the demultiplexed values obtained in the demultiplexer with each other to provide the demultiplexed values to the switching controller; and a demultiplexer that inverts the demultiplexed values obtained in the demultiplexer, And a plurality of inverters provided to the liquid crystal display panel. 제3항 내지 제7항에 있어서, 상기 스위칭 제어부는 다수개의 논리합소자에서 얻어진 비트값과 역다중화부에서 얻어진 최상위 비트 및 최하위 비트값에 따라 스위칭되어 그레이레벨 전압중 두 기준전압을 선택하는 다수개의 스위칭소자와, 상기 역다중화부에서 얻어진 임의 비트값과 이　 반전하여 얻어진 임의 비트값에 따라 스위칭되어 상기 스위칭소자에서 선택되어 입력되는 그레이전압을 그레이레벨 출력부로 제공하는 다수개의 스위칭소자로 이루어지는 것을 특징으로 하는 액정표시 판넬의 다계조 표시장치.8. The apparatus of claim 3, wherein the switching controller comprises: a plurality of switching controllers, each of which is switched according to a bit value obtained in a plurality of the OR gates and a most significant bit and a least significant bit value obtained in the demultiplexer, And a plurality of switching elements which are switched according to an arbitrary bit value obtained by inverting an arbitrary bit value obtained by the demultiplexer and provide a gray voltage selected and input to the switching element to a gray level output part Of the liquid crystal display panel. 제1항에 있어서, 상기 그레이레벨 출력부는 보간제어부에서 얻어진 스위칭 제어신호에 따라 교번으로 스위칭되어 상기 그레이레벨 선택부에서 선택된 레벨이 다른 두 기준전압을 교번으로 출력하는 스위칭소자로 이루어지는 것을 특징으로 하는 액정표시 판넬의 다계조 표시장치.The apparatus of claim 1, wherein the gray-level output unit comprises a switching element that is alternately switched according to a switching control signal obtained by the interpolation control unit and alternately outputs two reference voltages having different levels selected by the gray-level selection unit Multi-gradation display of liquid crystal display panel. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960014277A 1996-05-02 1996-05-02 Multi-gray display device of liquid display panel KR100215783B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100486228B1 (en) * 1998-01-06 2005-06-16 삼성전자주식회사 Contrast voltage control circuit for driving liquid crystal device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100486228B1 (en) * 1998-01-06 2005-06-16 삼성전자주식회사 Contrast voltage control circuit for driving liquid crystal device

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