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GB2278525A - Analog video interface for a digital video display - Google Patents

Analog video interface for a digital video display

Info

Publication number
GB2278525A
GB2278525A GB9414763A GB9414763A GB2278525A GB 2278525 A GB2278525 A GB 2278525A GB 9414763 A GB9414763 A GB 9414763A GB 9414763 A GB9414763 A GB 9414763A GB 2278525 A GB2278525 A GB 2278525A
Authority
GB
United Kingdom
Prior art keywords
frequency
analog video
clock signal
basic clock
video
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
GB9414763A
Other versions
GB9414763D0 (en
GB2278525B (en
Inventor
Jarmo Kurikko
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.)
ICL Personal Systems Oy
Original Assignee
ICL Personal Systems Oy
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 ICL Personal Systems Oy filed Critical ICL Personal Systems Oy
Publication of GB9414763D0 publication Critical patent/GB9414763D0/en
Publication of GB2278525A publication Critical patent/GB2278525A/en
Application granted granted Critical
Publication of GB2278525B publication Critical patent/GB2278525B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/006—Details of the interface to the display terminal
    • G09G5/008—Clock recovery
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display 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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/005—Adapting incoming signals to the display format of the display terminal
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/006—Details of the interface to the display terminal

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention relates to an analog video interface for a digital video display, comprising an analog video input (31) for receiving at least one analog video signal with composite or separate horizontal and vertical deflection signals; digitizing means (36) for digitizing said at least one analog video signal; means (41) for generating a basic clock signal having a frequency at least n times a desired video frequency, where n >/= 1; means (41, 43) for generating control signals for the digital display and a sampling clock signal for the digitizing means in synchronization with the basic clock signal. According to the invention, said display further comprises means (32) for determining the actual video frequency of the analog video signal on the basis of said received signals; said means for generating the basic clock signal comprising a programmable frequency synthesizer means responsive to said determining means for synthesizing the basic clock of a frequency at least n times said determined actual video frequency, where n >/= 1. <IMAGE>
GB9414763A 1992-01-30 1993-01-29 Analog video interface for a digital video display Expired - Fee Related GB2278525B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI920416A FI96647C (en) 1992-01-30 1992-01-30 Analog video connection for digital video screen
PCT/FI1993/000031 WO1993015497A1 (en) 1992-01-30 1993-01-29 Analog video interface for a digital video display

Publications (3)

Publication Number Publication Date
GB9414763D0 GB9414763D0 (en) 1994-09-28
GB2278525A true GB2278525A (en) 1994-11-30
GB2278525B GB2278525B (en) 1995-08-02

Family

ID=8534327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9414763A Expired - Fee Related GB2278525B (en) 1992-01-30 1993-01-29 Analog video interface for a digital video display

Country Status (5)

Country Link
JP (1) JPH07503327A (en)
DE (1) DE4390256T1 (en)
FI (1) FI96647C (en)
GB (1) GB2278525B (en)
WO (1) WO1993015497A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5715029A (en) * 1994-10-25 1998-02-03 Fergason; James L. Optical dithering system using birefringence for optical displays and method
US6184969B1 (en) 1994-10-25 2001-02-06 James L. Fergason Optical display system and method, active and passive dithering using birefringence, color image superpositioning and display enhancement
JPH08234701A (en) * 1995-02-28 1996-09-13 Sony Corp Video display device
WO1997005740A1 (en) * 1995-07-28 1997-02-13 Litton Systems Canada Limited Method and apparatus for digitizing video signals especially for flat panel lcd displays
US5917461A (en) * 1996-04-26 1999-06-29 Matsushita Electric Industrial Co., Ltd. Video adapter and digital image display apparatus
JP3487119B2 (en) * 1996-05-07 2004-01-13 松下電器産業株式会社 Dot clock regeneration device
WO1997050242A2 (en) 1996-06-26 1997-12-31 Sony Electronics Inc. System and method for overlay of a motion video signal on an analog video signal
US6195079B1 (en) 1996-11-18 2001-02-27 Sage, Inc. On-screen user interface for a video adapter circuit
US5953074A (en) * 1996-11-18 1999-09-14 Sage, Inc. Video adapter circuit for detection of analog video scanning formats
US6078361A (en) * 1996-11-18 2000-06-20 Sage, Inc Video adapter circuit for conversion of an analog video signal to a digital display image
AU5435898A (en) * 1996-11-18 1998-06-10 Sage, Inc. Adapter circuit for a flat panel display monitor
JPH10198302A (en) 1997-01-10 1998-07-31 Matsushita Electric Ind Co Ltd Multi-scan display device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0269199A2 (en) * 1986-11-21 1988-06-01 Mitsubishi Denki Kabushiki Kaisha Sampling clock pulse generator for image display units

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0269199A2 (en) * 1986-11-21 1988-06-01 Mitsubishi Denki Kabushiki Kaisha Sampling clock pulse generator for image display units

Also Published As

Publication number Publication date
GB9414763D0 (en) 1994-09-28
WO1993015497A1 (en) 1993-08-05
FI96647C (en) 1996-07-25
FI96647B (en) 1996-04-15
DE4390256T1 (en) 1995-07-20
FI920416A0 (en) 1992-01-30
FI920416A7 (en) 1993-07-31
JPH07503327A (en) 1995-04-06
GB2278525B (en) 1995-08-02

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20060129