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KR970007783A - 표시장치의 구동회로 - Google Patents

표시장치의 구동회로 Download PDF

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Publication number
KR970007783A
KR970007783A KR1019960028528A KR19960028528A KR970007783A KR 970007783 A KR970007783 A KR 970007783A KR 1019960028528 A KR1019960028528 A KR 1019960028528A KR 19960028528 A KR19960028528 A KR 19960028528A KR 970007783 A KR970007783 A KR 970007783A
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KR
South Korea
Prior art keywords
display
sustain
driving
load ratio
period
Prior art date
Application number
KR1019960028528A
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English (en)
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KR100445731B1 (ko
Inventor
준이찌 오노데라
마사미찌 나까지마
아사오 고사까이
마사유끼 고바야시
하야도 덴다
세이지 마쓰나가
도오루 아이다
Original Assignee
야기 쓰구오
가부시키가이샤 후지쓰 제네럴
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Priority claimed from JP20778295A external-priority patent/JP3206711B2/ja
Priority claimed from JP7207781A external-priority patent/JP2964922B2/ja
Application filed by 야기 쓰구오, 가부시키가이샤 후지쓰 제네럴 filed Critical 야기 쓰구오
Publication of KR970007783A publication Critical patent/KR970007783A/ko
Application granted granted Critical
Publication of KR100445731B1 publication Critical patent/KR100445731B1/ko

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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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/28—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2059—Display of intermediate tones using error diffusion
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/28—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/28—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • G09G3/2944—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge by varying the frequency of sustain pulses or the number of sustain pulses proportionally in each subfield of the whole frame
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/28—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • G09G3/2946—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge by introducing variations of the frequency of sustain pulses within a frame or non-proportional variations of the number of sustain pulses in each subfield
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/28—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
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    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/28—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/298—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels using surface discharge panels
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
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    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
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    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of Gas Discharge Display Tubes (AREA)

Abstract

1. 청구범위에 기재된 발명이 속한 기술분야
본 발명은 표시장치의 구동회로에 관한 것이다.
2. 발명이 해결하려고 하는 기술적 과제
본 발명은 표시부하율이 큰때나 적은때나 항상 일정한 발광휘도특성으로 화상표시가 될 수 있는 표시장치의 구동회로를 제공하는데 있다.
3. 발명의 해결방법의 요지
복수의 구동소자(10)를 갖고 각 구동소자(10)가 복수화소의 구동을 담당함과 동시에 입력영상신호에 기초해서 각 구동소자(10)로부터 표시판에 공급하는 서스테잉펄스의 펄스수의 변화로 표시휘도가 변화하는 표시장치에 있어서, 입력영상신호에 기초해서 일정기간마다의 표시부하율을 검출하는 표시부하율검출수단과, 이 표시부하율검출수단의 검출출력에 기초해서 표시판의 휘도특성을 일정하게 유지하도록 서스테인잉펄스수를 제어하는 서스테인잉펄스 제어수단을 구비한 것을 특징으로 하는 표시장치의 구동회로이다.
4. 발명의 중요한 용도
본 발명은 서스테인잉펄스수, 서스테인잉전압, 또는 서스테인잉전류의 변화로 표시휘도가 변화하도록 한 표시장치의 구동회로에 관한 것이다.

Description

표시장치의 구동회로
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제5도는 본 발명에 의한 표시장치의 구동회로의 제2의 실시형태를 나타내는 블록도.

Claims (12)

  1. 복수의 구동소자(10)를 갖고 각 구동소자(10)가 복수화소의 구동을 담당함과 동시에 입력영상신호에 기초해서 각 구동소자(10)로부터 표시판에 공급하는 서스테잉펄스의 펄스수의 변화로 표시휘도가 변화하는 표시장치에 있어서, 입력영상신호에 기초해서 일정기간마다의 표시부하율을 검출하는 표시부하율검출수단과, 이 표시부하율검출수단의 검출출력에 기초해서 표시판의 휘도특성을 일정하게 유지하도록 서스테인잉펄스수를 제어하는 서스테인잉펄스 제어수단을 구비한 것을 특징으로 하는 표시장치의 구동회로.
  2. 제1항에 있어서, 표시장치는 표시판의 1화면표시기간을 표시색조에 대응하는 복수의 표시기간으로 시분할하고 각 분할표시기간의 서스테인잉펄스수에 가중해서 다중색조화상을 표시하는 표시장치로서, 표시부하율검출수단은 1화면표시기간 또는 1분할표시기간중의 한쪽의 표시기간마다의 구동화소수를 계수하는 카운터(22)로 되고 서스테인잉펄스제어수단은 카운터(22)의 계수치에 기초해서 서스테인잉펄스수를 제어하는 서스테인잉펄스제어회로로 구성된 것을 특징으로 하는 표시장치의 구동회로.
  3. 제2항에 있어서, 서스테인잉펄스제어회로는 카운터(22)의 계수치를 기초로해서 표시판의 휘도특성을 일정하게 유지하기 위한 서스테인잉펄스수를 미리 기억한 룩업테이블(24)을 주체로 한 것을 특징으로 하는 표시장치의 구동회로.
  4. 복수의 구동소자(10)를 갖고 각 구동소자(10)가 복수화소의 구동을 담당함과 동시에 입력영상신호에 기초해서 각 구동소자(10)로부터 표시판에 공급하는 서스테잉전압 또는 서스테인잉전류의 변화로 표시휘도가 변화하는 표시장치에 있어서, 입력영상신호에 기초해서 일정기간마다의 표시부하율을 검출하는 표시부하율검출수단과, 이 표시부하율검출수단의 검출출력에 기초해서 표시판의 휘도특성을 일정하게 유지하도록 서스테인잉전압 또는 서스테인잉전류를 제어하는 서스테인잉전압·전류제어수단을 구비한 것을 특징으로 하는 표시장치의 구동회로.
  5. 제4항에 있어서, 표시장치는 표시판의 1화면표시기간을 표시색조에 대응하는 복수의 표시기간으로 시분할하고 각 분할표시기간의 서스테인잉펄스수에 가중해서 다중색조화상을 표시하는 표시장치로서, 표시부하율검출수단은 1화면표시기간마다의 구동화소수를 계수하는 카운더(22)로 되고 서스테인잉펄스제어수단은 카운터(22)의 계수치에 기초해서 서스테인잉전압 또는 서스테인잉전류를 제어하는 서스테인잉전압·전류제어회로로 구성된 것을 특징으로 하는 표시장치의 구동회로.
  6. 제4항에 있어서, 표시장치는 표시판의 1화면표시기간을 표시색조에 대응하는 복수의 표시기간으로 시분할하고 각 분할표시기간의 서스테인잉펄스수에 가중해서 다중색조화상을 표시하는 표시장치로서, 표시부하율검출수단은 1화면표시기간마다의 구동화소수를 계수하는 카운터(22)로 되고 서스테인잉펄스제어수단은 카운터(22)의 계수치에 기초해서 서스테인잉전압 또는 서스테인잉전류를 제어하는 서스테인잉전압·전류제어회로로 구성된 것을 특징으로 하는 표시장치의 구동회로.
  7. 복수의 구동소자(10)를 갖고 각 구동소자(10)가 복수화소의 구동을 담당하고 표시판의 1화면표시기간을 표시색조에 대응하는 복수의 표시기간으로 시분할하고 각 분할표시기간의 서스테인잉펄스수에 가중해서 다중색조화상을 표시하는 표시장치에 있어서, n비트(n은 2 이상의 정수)의 입력영상신호를 m비트(mn-1)의 영상신호로 변환함과 동시에 중간레벨을 인접구동레벨로부터 구하는 중간색조표시수단과, 이 중간색조표시수단의 m비트의 영상신호에 기초해서 일정기간마다의 표시면적을 검출하고, 이 검출출력에 기초하여 표시판의 휘도특성을 일정하게 유지하도록 서스테인잉펄스를 제어하는 표시면적검출수단을 구비한 것을 특징으로 하는 표시장치의 구동회로.
  8. 제7항에 있어서, 중간표시수단은 표시해야 할 영상레벨과 표시한 구동레벨과의 차이를 오차로해서 주위의 영상에 확산시키는 오차확산회로로된 것을 특징으로 하는 표시장치의 구동회로.
  9. 제7항 또는 제8항에 있어서, 표시면적검출수단은 일정기간 마다의 표시부하율을 검출하는 표시부하율검출회로와 이 표시부하율검출회로의 검출출력에 기초해서 표시판의 휘도특성을 일정하게 유지하도록 서스테인잉펄스수를 제어하는 서스테인잉펄스제어회로로된 것을 특징으로 하는 표시장치의 구동회로.
  10. 제7항 또는 제8항에 있어서, 표시면적검출수단은 일정기간 마다의 표시부하율을 검출하는 표시부하율검출회로와 이 표시부하율검출회로의 검출출력에 기초해서 표시판의 휘도특성을 일정하게 유지하도록 서스테인잉전압 또는 서스테인잉전류를 제어하는 서스테인잉전압·전류제어회로로된 것을 특징으로 하는 표시장치의 구동회로.
  11. 제10항에 있어서, 표시부하율검출회로는 1화면표시기간마다의 구동화소수를 계수하는 카운터(22)로 되고 서스테인잉펄스제어회로는 카운터(22)의 계수치에 기초해서 서스테인잉전압 또는 서스테인잉전류를 제어해서 된 것을 특징으로 하는 표시장치의 구동회로.
  12. 제10항에 있어서, 표시부하율검출회로는 1라인표시기간마다의 구동화소수를 계수하는 카운터(22)로 되고 서스테인잉펄스제어회로는 카운터(22)의 계수치에 기초해서 서스테인잉전압 또는 서스테인잉전류를 제어해서 된 것을 특징으로 하는 표시장치의 구동회로.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
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