EP0391654A3 - A drive circuit for driving an lcd apparatus - Google Patents

A drive circuit for driving an lcd apparatus Download PDF

Info

Publication number
EP0391654A3
EP0391654A3 EP19900303539 EP90303539A EP0391654A3 EP 0391654 A3 EP0391654 A3 EP 0391654A3 EP 19900303539 EP19900303539 EP 19900303539 EP 90303539 A EP90303539 A EP 90303539A EP 0391654 A3 EP0391654 A3 EP 0391654A3
Authority
EP
European Patent Office
Prior art keywords
signal
digital video
pulsewidth
amplitude
analog
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP19900303539
Other languages
German (de)
French (fr)
Other versions
EP0391654B1 (en
EP0391654A2 (en
Inventor
Yoshiharu Kanatani
Hirofumi Fukuoka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
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
Priority claimed from JP1085525A external-priority patent/JP2520168B2/en
Priority claimed from JP1085524A external-priority patent/JP2520167B2/en
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of EP0391654A2 publication Critical patent/EP0391654A2/en
Publication of EP0391654A3 publication Critical patent/EP0391654A3/en
Application granted granted Critical
Publication of EP0391654B1 publication Critical patent/EP0391654B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • G09G3/2011—Display of intermediate tones by amplitude modulation
    • 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
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • 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
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0259—Details of the generation of driving signals with use of an analog or digital ramp generator in the column driver or in the pixel circuit
    • 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
    • G09G2310/0283—Arrangement of drivers for different directions of scanning
    • 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
    • G09G3/3614—Control of polarity reversal in general

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal (AREA)

Abstract

A drive device for driving a display apparatus having a display unit which includes a plurality of signal electrodes arranged in juxtaposition is disclosed. The drive device comprises: a signal electrode drive circuit for amplitude-modulating an input digital video signal by performing digital-­ analog conversion, and supplying the resulting analog signal to one of the signal electrodes; a memory for storing the input digital video signal; a pulsewidth conversion circuit for converting the stored digital video signal into a pulse signal, the width of the pulse signal corresponding to the information contained in the stored digital video signal; a pulsewidth-amplitude conversion circuit for converting the pulse signal into an analog signal the amplitude of which corresponds to the pulsewidth of the pulse signal; and an output circuit for supplying a drive signal to one of the signal electrodes, in accordance with the analog signal.
EP90303539A 1989-04-04 1990-04-03 A drive circuit for driving an LCD apparatus Expired - Lifetime EP0391654B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP1085525A JP2520168B2 (en) 1989-04-04 1989-04-04 Display device
JP85525/89 1989-04-04
JP1085524A JP2520167B2 (en) 1989-04-04 1989-04-04 Driving circuit for display device
JP85524/89 1989-04-04

Publications (3)

Publication Number Publication Date
EP0391654A2 EP0391654A2 (en) 1990-10-10
EP0391654A3 true EP0391654A3 (en) 1991-04-10
EP0391654B1 EP0391654B1 (en) 1994-11-02

Family

ID=26426529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90303539A Expired - Lifetime EP0391654B1 (en) 1989-04-04 1990-04-03 A drive circuit for driving an LCD apparatus

Country Status (3)

Country Link
EP (1) EP0391654B1 (en)
KR (1) KR930005376B1 (en)
DE (1) DE69013736T2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2642204B2 (en) * 1989-12-14 1997-08-20 シャープ株式会社 Drive circuit for liquid crystal display
WO1992007352A1 (en) * 1990-10-19 1992-04-30 Thomson S.A. Control circuit for matrix-type readout devices and signal decoder for such circuit
US5317401A (en) * 1992-06-19 1994-05-31 Thomson Consumer Electronics S.A. Apparatus for providing contrast and/or brightness control of a video signal
GB9217336D0 (en) * 1992-08-14 1992-09-30 Philips Electronics Uk Ltd Active matrix display devices and methods for driving such
GB9223697D0 (en) * 1992-11-12 1992-12-23 Philips Electronics Uk Ltd Active matrix display devices
KR950007126B1 (en) * 1993-05-07 1995-06-30 삼성전자주식회사 Operating apparatus for lcd display unit
JP3329008B2 (en) * 1993-06-25 2002-09-30 ソニー株式会社 Bidirectional signal transmission network and bidirectional signal transfer shift register
JP3102666B2 (en) * 1993-06-28 2000-10-23 シャープ株式会社 Image display device
US5734366A (en) * 1993-12-09 1998-03-31 Sharp Kabushiki Kaisha Signal amplifier, signal amplifier circuit, signal line drive circuit and image display device
JP3277056B2 (en) * 1993-12-09 2002-04-22 シャープ株式会社 Signal amplification circuit and image display device using the same
JPH09230834A (en) 1996-02-27 1997-09-05 Sony Corp Active matrix display device
KR100311204B1 (en) * 1998-10-20 2001-11-02 가나이 쓰토무 Liquid crystal display device having a gray-scale voltage producing circuit
JP2002258810A (en) 2001-03-05 2002-09-11 Hitachi Ltd Liquid crystal display

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162674A (en) * 1984-06-22 1986-02-05 Citizen Watch Co Ltd Color liquid crystal display apparatus with improved display color mixing
EP0254805A2 (en) * 1986-07-30 1988-02-03 Hosiden Corporation Method and apparatus for multi-gradation display
GB2205191A (en) * 1987-05-29 1988-11-30 Philips Electronic Associated Active matrix display system
GB2212361A (en) * 1987-11-10 1989-07-19 Citizen Watch Co Ltd Color liquid crystal display apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162674A (en) * 1984-06-22 1986-02-05 Citizen Watch Co Ltd Color liquid crystal display apparatus with improved display color mixing
EP0254805A2 (en) * 1986-07-30 1988-02-03 Hosiden Corporation Method and apparatus for multi-gradation display
GB2205191A (en) * 1987-05-29 1988-11-30 Philips Electronic Associated Active matrix display system
GB2212361A (en) * 1987-11-10 1989-07-19 Citizen Watch Co Ltd Color liquid crystal display apparatus

Also Published As

Publication number Publication date
KR930005376B1 (en) 1993-06-19
EP0391654B1 (en) 1994-11-02
EP0391654A2 (en) 1990-10-10
DE69013736T2 (en) 1995-05-04
DE69013736D1 (en) 1994-12-08
KR900016935A (en) 1990-11-14

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