GB2204174B - Electro-optical modulator - Google Patents

Electro-optical modulator

Info

Publication number
GB2204174B
GB2204174B GB8809416A GB8809416A GB2204174B GB 2204174 B GB2204174 B GB 2204174B GB 8809416 A GB8809416 A GB 8809416A GB 8809416 A GB8809416 A GB 8809416A GB 2204174 B GB2204174 B GB 2204174B
Authority
GB
United Kingdom
Prior art keywords
electro
optical modulator
modulator
optical
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.)
Expired - Lifetime
Application number
GB8809416A
Other versions
GB2204174A (en
GB8809416D0 (en
Inventor
Kozo Yokoyama
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments 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
Priority claimed from JP10047287A external-priority patent/JPS63265225A/en
Priority claimed from JP10047387A external-priority patent/JPS63265226A/en
Priority claimed from JP10047487A external-priority patent/JPS63265227A/en
Application filed by Seiko Instruments Inc filed Critical Seiko Instruments Inc
Publication of GB8809416D0 publication Critical patent/GB8809416D0/en
Publication of GB2204174A publication Critical patent/GB2204174A/en
Application granted granted Critical
Publication of GB2204174B publication Critical patent/GB2204174B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/12—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by switched stationary formation of lamps, photocells or light relays
    • H04N3/127—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by switched stationary formation of lamps, photocells or light relays 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3692—Details of drivers for data electrodes suitable for passive 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
    • 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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • 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
    • G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant

Landscapes

  • 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)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
GB8809416A 1987-04-23 1988-04-21 Electro-optical modulator Expired - Lifetime GB2204174B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP10047287A JPS63265225A (en) 1987-04-23 1987-04-23 Optical modulator
JP10047387A JPS63265226A (en) 1987-04-23 1987-04-23 Optical modulator
JP10047487A JPS63265227A (en) 1987-04-23 1987-04-23 Optical modulator

Publications (3)

Publication Number Publication Date
GB8809416D0 GB8809416D0 (en) 1988-05-25
GB2204174A GB2204174A (en) 1988-11-02
GB2204174B true GB2204174B (en) 1991-03-13

Family

ID=27309229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8809416A Expired - Lifetime GB2204174B (en) 1987-04-23 1988-04-21 Electro-optical modulator

Country Status (3)

Country Link
FR (1) FR2614437B1 (en)
GB (1) GB2204174B (en)
IT (1) IT1219550B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2644001B1 (en) * 1989-03-03 1992-12-18 Centaure Sa IMAGE VIEWING SYSTEM
US5185602A (en) * 1989-04-10 1993-02-09 Cirrus Logic, Inc. Method and apparatus for producing perception of high quality grayscale shading on digitally commanded displays
DE3930259A1 (en) * 1989-09-11 1991-03-21 Thomson Brandt Gmbh CONTROL CIRCUIT FOR A LIQUID CRYSTAL DISPLAY
JP2642204B2 (en) * 1989-12-14 1997-08-20 シャープ株式会社 Drive circuit for liquid crystal display
FR2656757B1 (en) * 1989-12-28 1992-03-20 Thomson Consumer Electronics METHOD FOR ADDRESSING EACH COLUMN OF A MATRIX TYPE LCD SCREEN.
US5485173A (en) * 1991-04-01 1996-01-16 In Focus Systems, Inc. LCD addressing system and method
WO1993013513A1 (en) * 1991-12-24 1993-07-08 Cirrus Logic, Inc. Process for producing shaded images on display screens
US5751265A (en) * 1991-12-24 1998-05-12 Cirrus Logic, Inc. Apparatus and method for producing shaded images on display screens
JPH0876711A (en) * 1994-09-02 1996-03-22 Mitsubishi Electric Corp Display device
EP0838800A1 (en) * 1996-10-24 1998-04-29 Motorola, Inc. Nonlinear gray scale method and apparatus
US6211859B1 (en) 1997-03-10 2001-04-03 Chips & Technologies, Llc Method for reducing pulsing on liquid crystal displays
US6034663A (en) * 1997-03-10 2000-03-07 Chips & Technologies, Llc Method for providing grey scale images to the visible limit on liquid crystal displays
WO1999021159A1 (en) * 1997-10-17 1999-04-29 Motorola Inc. Method for controlling brightness in a flat panel display
JP3073486B2 (en) 1998-02-16 2000-08-07 キヤノン株式会社 Image forming apparatus, electron beam apparatus, modulation circuit, and driving method of image forming apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413256A (en) * 1980-02-21 1983-11-01 Sharp Kabushiki Kaisha Driving method for display panels
GB2124816A (en) * 1982-08-04 1984-02-22 Casio Computer Co Ltd Portable television receiver of the panel type
US4634229A (en) * 1983-07-12 1987-01-06 Bbc Brown, Boveri & Company Limited Liquid crystal display

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1239468A (en) * 1984-01-13 1988-07-19 Yuji Watanabe Video display system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413256A (en) * 1980-02-21 1983-11-01 Sharp Kabushiki Kaisha Driving method for display panels
GB2124816A (en) * 1982-08-04 1984-02-22 Casio Computer Co Ltd Portable television receiver of the panel type
US4634229A (en) * 1983-07-12 1987-01-06 Bbc Brown, Boveri & Company Limited Liquid crystal display

Also Published As

Publication number Publication date
FR2614437A1 (en) 1988-10-28
FR2614437B1 (en) 1993-10-15
IT8847882A0 (en) 1988-04-21
GB2204174A (en) 1988-11-02
GB8809416D0 (en) 1988-05-25
IT1219550B (en) 1990-05-18

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20080420