WO2007112021A3 - Self-refreshing display controller for a display device in a computational unit - Google Patents

Self-refreshing display controller for a display device in a computational unit Download PDF

Info

Publication number
WO2007112021A3
WO2007112021A3 PCT/US2007/007284 US2007007284W WO2007112021A3 WO 2007112021 A3 WO2007112021 A3 WO 2007112021A3 US 2007007284 W US2007007284 W US 2007007284W WO 2007112021 A3 WO2007112021 A3 WO 2007112021A3
Authority
WO
WIPO (PCT)
Prior art keywords
display
display device
display controller
controller
processor
Prior art date
Application number
PCT/US2007/007284
Other languages
French (fr)
Other versions
WO2007112021A2 (en
Inventor
Mark J Foster
Mary Lou Jepsen
James Gettys
V Michael Bove Jr
Original Assignee
One Laptop Per Child Ass 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 One Laptop Per Child Ass Inc filed Critical One Laptop Per Child Ass Inc
Priority to CN2007800004570A priority Critical patent/CN101322094B/en
Publication of WO2007112021A2 publication Critical patent/WO2007112021A2/en
Publication of WO2007112021A3 publication Critical patent/WO2007112021A3/en

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
    • G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
    • G09G5/363—Graphics controllers
    • 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
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/028—Circuits for converting colour display signals into monochrome display signals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0414—Vertical resolution change
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0421—Horizontal resolution change
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0428—Gradation resolution change
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/12—Frame memory handling
    • G09G2360/128—Frame memory using a Synchronous Dynamic RAM [SDRAM]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/18—Use of a frame buffer in a display terminal, inclusive of the display panel
    • 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
    • G09G3/3406—Control of illumination source

Abstract

A method, system and computer program product for a display system driving a display device is provided. The display system includes a processor, a primary display controller, a secondary display controller and the display device. The primary display controller receives display data that is sent by the processor. The primary display controller also drives the display device when the processor sends new display frames. When these display frames are sent by the processor continuously, control of the display device is switched to the secondary display controller, which is optimized for a low-power operation.
PCT/US2007/007284 2006-03-23 2007-03-22 Self-refreshing display controller for a display device in a computational unit WO2007112021A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2007800004570A CN101322094B (en) 2006-03-23 2007-03-22 Self-refreshing display controller for a display device in a computational unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US78506606P 2006-03-23 2006-03-23
US60/785,066 2006-03-23

Publications (2)

Publication Number Publication Date
WO2007112021A2 WO2007112021A2 (en) 2007-10-04
WO2007112021A3 true WO2007112021A3 (en) 2008-06-19

Family

ID=38541691

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/007284 WO2007112021A2 (en) 2006-03-23 2007-03-22 Self-refreshing display controller for a display device in a computational unit

Country Status (2)

Country Link
CN (1) CN101322094B (en)
WO (1) WO2007112021A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5355369B2 (en) * 2009-12-10 2013-11-27 キヤノン株式会社 Data processing apparatus, data processing system, and display control method for controlling display on data processing apparatus
US8933915B2 (en) * 2011-10-26 2015-01-13 Htc Corporation Integrated circuit for display apparatus and method thereof
CN110516694B (en) * 2019-07-05 2022-04-12 福州大学 Drainage pipeline defect automatic detection method based on cost sensitive learning
CN114446212B (en) * 2020-10-30 2023-07-18 合肥京东方光电科技有限公司 Display device and self-refreshing method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040125099A1 (en) * 2002-12-30 2004-07-01 Stanley Randy P. Method, apparatus and article for display unit power management
US20040217954A1 (en) * 2003-05-01 2004-11-04 O'gorman Patrick Reduced power consumption for a graphics accelerator and display
US20040252115A1 (en) * 2001-08-03 2004-12-16 Olivier Boireau Image refresh in a display
US20050268236A1 (en) * 2004-05-24 2005-12-01 Makoto Kosaka Information processing apparatus and display control method for information processing apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2726007Y (en) * 2004-07-21 2005-09-14 志合电脑股份有限公司 Information apparatus with selectively switched multi-display processor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040252115A1 (en) * 2001-08-03 2004-12-16 Olivier Boireau Image refresh in a display
US20040125099A1 (en) * 2002-12-30 2004-07-01 Stanley Randy P. Method, apparatus and article for display unit power management
US20040217954A1 (en) * 2003-05-01 2004-11-04 O'gorman Patrick Reduced power consumption for a graphics accelerator and display
US20050268236A1 (en) * 2004-05-24 2005-12-01 Makoto Kosaka Information processing apparatus and display control method for information processing apparatus

Also Published As

Publication number Publication date
WO2007112021A2 (en) 2007-10-04
CN101322094B (en) 2011-04-06
CN101322094A (en) 2008-12-10

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