GB2316261B - Rear projection type image display apparatus - Google Patents

Rear projection type image display apparatus

Info

Publication number: GB2316261B
Authority: GB; United Kingdom
Prior art keywords: image display; display apparatus; type image; projection type; rear projection
Prior art date: 1994-01-17
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 - Fee Related

Application number

GB9722961A

Other versions

GB2316261A (en

GB9722961D0 (en

Inventor

Tutomu Simada

Tohru Mori

Satoshi Ishizuka

Kohsuke Ozeki

Maki Furui

Naoka Kubo

Yasuhiko Komatsu

Yoshinori Matsumura

Kazunari Nakagawa

Koji Suso

Yoshimasa Yokoyama

Akira Takahashi

Shigeru Mori

Tetsu Ohishi

Toshimitsu Watanabe

Hiroki Yoshikawa

Takahiko Yoshida

Kiyoshi Wada

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.)

Hitachi Ltd

Original Assignee

Hitachi Ltd

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.)

1994-01-17

Filing date

1995-01-13

Publication date

1998-06-24

1994-02-04 Priority claimed from JP1238094A external-priority patent/JPH07222278A/en

1995-01-13 Application filed by Hitachi Ltd filed Critical Hitachi Ltd

1995-01-13 Priority claimed from GB9500694A external-priority patent/GB2285722B/en

1998-01-07 Publication of GB9722961D0 publication Critical patent/GB9722961D0/en

1998-02-18 Publication of GB2316261A publication Critical patent/GB2316261A/en

1998-06-24 Application granted granted Critical

1998-06-24 Publication of GB2316261B publication Critical patent/GB2316261B/en

2015-01-13 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/10—Projectors with built-in or built-on screen
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
- H04N5/7408—Direct viewing projectors, e.g. an image displayed on a video CRT or LCD display being projected on a screen
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
- H04N5/642—Disposition of sound reproducers
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
- H04N7/0122—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal the input and the output signals having different aspect ratios

Landscapes

Engineering & Computer Science (AREA)
Multimedia (AREA)
Signal Processing (AREA)
Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Projection Apparatus (AREA)
Transforming Electric Information Into Light Information (AREA)

GB9722961A 1994-01-17 1995-01-13 Rear projection type image display apparatus Expired - Fee Related GB2316261B (en)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
JP294094		1994-01-17
JP1238094A JPH07222278A (en)	1994-02-04	1994-02-04	Projection type image display device
GB9500694A GB2285722B (en)	1994-01-17	1995-01-13	Rear projection type image display apparatus

Publications (3)

Publication Number	Publication Date
GB9722961D0 GB9722961D0 (en)	1998-01-07
GB2316261A GB2316261A (en)	1998-02-18
GB2316261B true GB2316261B (en)	1998-06-24

Family

ID=27267549

Family Applications (2)

Application Number	Title	Priority Date	Filing Date
GB9722963A Expired - Fee Related GB2316262B (en)	1994-01-17	1995-01-13	Rear projection type image display apparatus
GB9722961A Expired - Fee Related GB2316261B (en)	1994-01-17	1995-01-13	Rear projection type image display apparatus

Family Applications Before (1)

Application Number	Title	Priority Date	Filing Date
GB9722963A Expired - Fee Related GB2316262B (en)	1994-01-17	1995-01-13	Rear projection type image display apparatus

Country Status (1)

Country	Link
GB (2)	GB2316262B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP3583737B2 (en) *	2001-06-29	2004-11-04	株式会社東芝	Projection display device and heat radiation method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4761063A (en) *	1986-01-09	1988-08-02	Pioneer Electronic Corporation	Projection lens system
US4792217A (en) *	1986-12-09	1988-12-20	Pioneer Electronic Corporation	Projection lens system
EP0488590A1 (en) *	1990-11-30	1992-06-03	THORN EMI plc	Display device
US5200814A (en) *	1989-04-28	1993-04-06	Hitachi, Ltd.	Video projector with optical color balance
DE4306851A1 (en) *	1992-03-12	1993-09-23	Mitsubishi Electric Corp	Video image projection system - uses deflection mirror and projection lens for combining three prim. colour beams provided by CRT's or LCD cells
EP0567330A2 (en) *	1992-04-23	1993-10-27	Pioneer Electronic Corporation	Projection television set
US5272540A (en) *	1989-04-28	1993-12-21	Hitachi, Ltd.	Temperature compensating lens system for projection television

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2640227C3 (en) *	1976-09-07	1980-03-20	Rolf 7050 Waiblingen Dieckhoff	Demonstration device, in particular audio-visual information device
US4925295A (en) *	1986-03-17	1990-05-15	Casio Computer Co., Ltd.	Projection display apparatus
DE3710628A1 (en) *	1987-03-31	1988-10-20	Demolux	OVERHEAD PROJECTOR

1995
- 1995-01-13 GB GB9722963A patent/GB2316262B/en not_active Expired - Fee Related
- 1995-01-13 GB GB9722961A patent/GB2316261B/en not_active Expired - Fee Related

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4761063A (en) *	1986-01-09	1988-08-02	Pioneer Electronic Corporation	Projection lens system
US4792217A (en) *	1986-12-09	1988-12-20	Pioneer Electronic Corporation	Projection lens system
US5200814A (en) *	1989-04-28	1993-04-06	Hitachi, Ltd.	Video projector with optical color balance
US5272540A (en) *	1989-04-28	1993-12-21	Hitachi, Ltd.	Temperature compensating lens system for projection television
EP0488590A1 (en) *	1990-11-30	1992-06-03	THORN EMI plc	Display device
DE4306851A1 (en) *	1992-03-12	1993-09-23	Mitsubishi Electric Corp	Video image projection system - uses deflection mirror and projection lens for combining three prim. colour beams provided by CRT's or LCD cells
EP0567330A2 (en) *	1992-04-23	1993-10-27	Pioneer Electronic Corporation	Projection television set

Also Published As

Publication number	Publication date
GB2316262A (en)	1998-02-18
GB2316261A (en)	1998-02-18
GB9722961D0 (en)	1998-01-07
GB9722963D0 (en)	1998-01-07
GB2316262B (en)	1998-06-24

Publication	Publication Date	Title
GB2285722B (en)	1998-06-24	Rear projection type image display apparatus
EP0665460A3 (en)	1996-01-17	Optical system for rear projection picture display apparatus.
GB2317290B (en)	2000-12-06	Image display apparatus
AU2629595A (en)	1996-01-04	Image display apparatus
EP0702494A3 (en)	1996-06-05	Three-dimensional image display apparatus
TW365407U (en)	1999-07-21	Projection display apparatus
HK1013338A1 (en)	1999-08-20	Rear projection screen
EP0643314A3 (en)	1995-11-02	Image Display Apparatus.
HK1013463A1 (en)	1999-08-27	Image displaying apparatus
AU1590395A (en)	1995-08-21	Image display apparatus
EP0760490A3 (en)	1997-11-12	Image display apparatus
EP0752613A3 (en)	1997-03-12	Rear projection screen
GB2302963B (en)	1999-04-07	Rear projection screen
GB9415894D0 (en)	1994-09-28	An apparatus for displaying an image
EP0747925A3 (en)	1997-11-12	Image display apparatus
AU1590495A (en)	1995-08-21	Image display apparatus
EP0710036A3 (en)	1996-07-03	Image projecting apparatus
GB9404258D0 (en)	1994-04-20	Apparatus for displaying an image
EP0749251A3 (en)	1997-11-19	A projection type image display apparatus
EP0803759A4 (en)	1999-03-17	Projection image display device
GB2292248B (en)	1996-07-03	An apparatus for displaying an image
EP0691790A3 (en)	1997-01-22	Image display apparatus
SG67949A1 (en)	1999-10-19	Picture display region discriminating apparatus
GB9414723D0 (en)	1994-09-07	An apparatus for displaying an image
GB2277240B (en)	1997-06-18	Image display apparatus

Legal Events

Date	Code	Title	Description
2005-08-31	PCNP	Patent ceased through non-payment of renewal fee	Effective date: 20050113