EP0457039A3 - Pixel-depth converter for a computer video display - Google Patents

Pixel-depth converter for a computer video display Download PDF

Info

Publication number: EP0457039A3
Authority: EP; European Patent Office
Prior art keywords: pixel; video display; computer video; depth converter; converter
Prior art date: 1990-05-16
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

EP19910105970

Other versions

EP0457039B1 (en

EP0457039A2 (en

Inventor

Steven Philip Larky

Alan Wesley Peevers

Joe Christopher St. Clair

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.)

International Business Machines Corp

Original Assignee

International Business Machines 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.)

1990-05-16

Filing date

1991-04-15

Publication date

1992-05-06

1991-04-15 Application filed by International Business Machines Corp filed Critical International Business Machines Corp

1991-11-21 Publication of EP0457039A2 publication Critical patent/EP0457039A2/en

1992-05-06 Publication of EP0457039A3 publication Critical patent/EP0457039A3/en

1995-03-29 Application granted granted Critical

1995-03-29 Publication of EP0457039B1 publication Critical patent/EP0457039B1/en

2011-04-15 Anticipated expiration legal-status Critical

Status 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
- 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
- G09G5/39—Control of the bit-mapped memory
- G09G5/393—Arrangements for updating the contents of the bit-mapped memory
- 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
- G09G5/14—Display of multiple viewports

Landscapes

Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Computer Hardware Design (AREA)
General Physics & Mathematics (AREA)
Theoretical Computer Science (AREA)
Controls And Circuits For Display Device (AREA)
Image Processing (AREA)
Facsimile Image Signal Circuits (AREA)

EP19910105970 1990-05-16 1991-04-15 Pixel-depth converter for a computer video display Expired - Lifetime EP0457039B1 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US52420190A	1990-05-16	1990-05-16
US524201		1990-05-16

Publications (3)

Publication Number	Publication Date
EP0457039A2 EP0457039A2 (en)	1991-11-21
EP0457039A3 true EP0457039A3 (en)	1992-05-06
EP0457039B1 EP0457039B1 (en)	1995-03-29

Family

ID=24088207

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19910105970 Expired - Lifetime EP0457039B1 (en)	1990-05-16	1991-04-15	Pixel-depth converter for a computer video display

Country Status (3)

Country	Link
EP (1)	EP0457039B1 (en)
JP (1)	JPH0792660B2 (en)
DE (1)	DE69108442T2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0572024A2 (en) *	1992-05-27	1993-12-01	Kabushiki Kaisha Toshiba	Multimedia display control system for storing image data in frame buffer
CA2108730C (en) *	1992-12-07	1999-10-12	James Corona	Apparatus for, and methods of providing a universal format of pixels and for scaling fields in the pixels
US5608864A (en) *	1994-04-29	1997-03-04	Cirrus Logic, Inc.	Variable pixel depth and format for video windows
US6069613A (en) *	1997-10-16	2000-05-30	Phoenix Technologies Ltd.	Basic input-output system (BIOS) read-only memory (ROM) including expansion table for expanding monochrome images into color image
US7502063B2 (en) *	2004-08-09	2009-03-10	Aptina Imaging Corporation	Camera with scalable resolution
WO2010065242A1 (en) *	2008-12-01	2010-06-10	Marvell World Trade, Ltd.	Bit resolution enhancement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4236228A (en) *	1977-03-17	1980-11-25	Tokyo Shibaura Electric Co., Ltd.	Memory device for processing picture images data
US4689807A (en) *	1985-11-06	1987-08-25	Texas Instruments Incorporated	Linked cell discharge detector having improved response time
EP0239840A2 (en) *	1986-04-02	1987-10-07	International Business Machines Corporation	Soft copy display of facsimile images
WO1987007973A1 (en) *	1986-06-18	1987-12-30	Technology Inc., 64	A display processor
EP0314922A2 (en) *	1987-11-03	1989-05-10	International Business Machines Corporation	Apparatus for communication pixel data from RAM memories to a display
EP0358353A2 (en) *	1988-09-06	1990-03-14	International Business Machines Corporation	Data transfers between memories

1991
- 1991-03-14 JP JP3103715A patent/JPH0792660B2/en not_active Expired - Lifetime
- 1991-04-15 EP EP19910105970 patent/EP0457039B1/en not_active Expired - Lifetime
- 1991-04-15 DE DE1991608442 patent/DE69108442T2/en not_active Expired - Fee Related

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4236228A (en) *	1977-03-17	1980-11-25	Tokyo Shibaura Electric Co., Ltd.	Memory device for processing picture images data
US4689807A (en) *	1985-11-06	1987-08-25	Texas Instruments Incorporated	Linked cell discharge detector having improved response time
EP0239840A2 (en) *	1986-04-02	1987-10-07	International Business Machines Corporation	Soft copy display of facsimile images
WO1987007973A1 (en) *	1986-06-18	1987-12-30	Technology Inc., 64	A display processor
EP0314922A2 (en) *	1987-11-03	1989-05-10	International Business Machines Corporation	Apparatus for communication pixel data from RAM memories to a display
EP0358353A2 (en) *	1988-09-06	1990-03-14	International Business Machines Corporation	Data transfers between memories

Also Published As

Publication number	Publication date
JPH0792660B2 (en)	1995-10-09
EP0457039B1 (en)	1995-03-29
DE69108442T2 (en)	1995-10-05
DE69108442D1 (en)	1995-05-04
JPH07114371A (en)	1995-05-02
EP0457039A2 (en)	1991-11-21

Legal Events

Date	Code	Title	Description
1991-10-04	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1991-11-21	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): DE FR GB
1992-02-26	17P	Request for examination filed	Effective date: 19911219
1992-03-17	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1992-05-06	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): DE FR GB
1994-01-05	17Q	First examination report despatched	Effective date: 19931123
1995-02-10	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1995-03-28	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 19950328 Year of fee payment: 5
1995-03-29	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE FR GB
1995-03-29	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 19950329 Year of fee payment: 5
1995-04-28	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 19950428 Year of fee payment: 5
1995-05-04	REF	Corresponds to:	Ref document number: 69108442 Country of ref document: DE Date of ref document: 19950504
1995-06-30	ET	Fr: translation filed
1996-02-02	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1996-02-02	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1996-03-20	26N	No opposition filed
1996-04-15	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Effective date: 19960415
1996-12-04	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19960415
1996-12-27	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Effective date: 19961227
1997-01-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Effective date: 19970101
1997-01-24	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST

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