EP0464620A3 - Image information control apparatus and display system - Google Patents

Image information control apparatus and display system Download PDF

Info

Publication number
EP0464620A3
EP0464620A3 EP19910110530 EP91110530A EP0464620A3 EP 0464620 A3 EP0464620 A3 EP 0464620A3 EP 19910110530 EP19910110530 EP 19910110530 EP 91110530 A EP91110530 A EP 91110530A EP 0464620 A3 EP0464620 A3 EP 0464620A3
Authority
EP
European Patent Office
Prior art keywords
partial
partial write
signal
circuit
state
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
EP19910110530
Other versions
EP0464620A2 (en
EP0464620B1 (en
Inventor
Hiroshi Inoue
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Publication of EP0464620A2 publication Critical patent/EP0464620A2/en
Publication of EP0464620A3 publication Critical patent/EP0464620A3/en
Application granted granted Critical
Publication of EP0464620B1 publication Critical patent/EP0464620B1/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
    • G09G3/34—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
    • G09G3/3651—Control of matrices with row and column drivers using an active matrix using multistable liquid crystals, e.g. ferroelectric 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
    • 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
    • G09G3/3622—Control of matrices with row and column drivers using a passive matrix
    • G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric 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
    • G09G2310/00—Command of the display device
    • G09G2310/04—Partial updating of the display screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Selective Calling Equipment (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Alarm Systems (AREA)

Abstract

An image information control apparatus includes a partial write detector having at least two types of memory units for detecting and storing addresses accessed to a VRAM in units of lines in a scanning direction, thereby repeating the detection and the storage at different cycles, a circuit for performing calculations to recognize partial write information from contents of each of the memory units, memory units for storing the respective calculation results, a circuit for comparing the memory contents to determine a size relationship between partial write areas, a partial write ID signal controller for controlling a partial write ID signal on the basis of the size relationship between partial write areas and externally outputting the signal, and a circuit for, even when partial writing is being executed, forcibly interrupting the partial writing in accordance with a state of an external refresh control signal, starting refresh, and restarting the partial writing in accordance with a partial write state and a change in state of the refresh control signal. <IMAGE>
EP91110530A 1990-06-27 1991-06-26 Image information control apparatus and display system Expired - Lifetime EP0464620B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2171102A JP2840398B2 (en) 1990-06-27 1990-06-27 Image information control device and display system
JP171102/90 1990-06-27

Publications (3)

Publication Number Publication Date
EP0464620A2 EP0464620A2 (en) 1992-01-08
EP0464620A3 true EP0464620A3 (en) 1992-12-23
EP0464620B1 EP0464620B1 (en) 1996-11-20

Family

ID=15917018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91110530A Expired - Lifetime EP0464620B1 (en) 1990-06-27 1991-06-26 Image information control apparatus and display system

Country Status (5)

Country Link
EP (1) EP0464620B1 (en)
JP (1) JP2840398B2 (en)
KR (1) KR950012016B1 (en)
AT (1) ATE145492T1 (en)
DE (1) DE69123182T2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69313161T2 (en) * 1992-02-28 1998-01-29 Canon Kk Method and device for checking a display unit
JP3156977B2 (en) * 1992-05-19 2001-04-16 キヤノン株式会社 Display control device and method
ATE151902T1 (en) * 1992-05-19 1997-05-15 Canon Kk METHOD AND DEVICE FOR CONTROLLING A DISPLAY
AU672648B2 (en) * 1993-01-11 1996-10-10 Canon Kabushiki Kaisha Display line dispatcher apparatus
EP0608056B1 (en) * 1993-01-11 1998-07-29 Canon Kabushiki Kaisha Display line dispatcher apparatus
DE69421832D1 (en) * 1993-01-11 2000-01-05 Canon Kk Color display device
CN102737589A (en) * 2011-03-29 2012-10-17 宏碁股份有限公司 Control method used for liquid crystal display device and liquid crystal display device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0361471A2 (en) * 1988-09-29 1990-04-04 Canon Kabushiki Kaisha Data processing system and apparatus
EP0368117A2 (en) * 1988-10-31 1990-05-16 Canon Kabushiki Kaisha Display system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0361471A2 (en) * 1988-09-29 1990-04-04 Canon Kabushiki Kaisha Data processing system and apparatus
EP0368117A2 (en) * 1988-10-31 1990-05-16 Canon Kabushiki Kaisha Display system

Also Published As

Publication number Publication date
DE69123182T2 (en) 1997-04-24
JP2840398B2 (en) 1998-12-24
DE69123182D1 (en) 1997-01-02
EP0464620A2 (en) 1992-01-08
ATE145492T1 (en) 1996-12-15
KR920001418A (en) 1992-01-30
KR950012016B1 (en) 1995-10-13
EP0464620B1 (en) 1996-11-20
JPH0458221A (en) 1992-02-25

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