DE69407078T2 - Bildprojektionsapparat mit Autofokus-System - Google Patents

Bildprojektionsapparat mit Autofokus-System

Info

Publication number
DE69407078T2
DE69407078T2 DE69407078T DE69407078T DE69407078T2 DE 69407078 T2 DE69407078 T2 DE 69407078T2 DE 69407078 T DE69407078 T DE 69407078T DE 69407078 T DE69407078 T DE 69407078T DE 69407078 T2 DE69407078 T2 DE 69407078T2
Authority
DE
Germany
Prior art keywords
image projector
autofocus system
autofocus
projector
image
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 - Fee Related
Application number
DE69407078T
Other languages
English (en)
Other versions
DE69407078D1 (de
Inventor
Allan Carmichael
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
Philips Electronics NV
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 Koninklijke Philips Electronics NV, Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Application granted granted Critical
Publication of DE69407078D1 publication Critical patent/DE69407078D1/de
Publication of DE69407078T2 publication Critical patent/DE69407078T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
    • 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
    • G03B21/14—Details
    • G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes
    • H04N9/28—Arrangements for convergence or focusing
    • 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
    • H04N9/317—Convergence or focusing systems
    • 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]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
  • Transforming Electric Information Into Light Information (AREA)
DE69407078T 1993-03-22 1994-03-16 Bildprojektionsapparat mit Autofokus-System Expired - Fee Related DE69407078T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93200826 1993-03-22

Publications (2)

Publication Number Publication Date
DE69407078D1 DE69407078D1 (de) 1998-01-15
DE69407078T2 true DE69407078T2 (de) 1998-06-04

Family

ID=8213715

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69407078T Expired - Fee Related DE69407078T2 (de) 1993-03-22 1994-03-16 Bildprojektionsapparat mit Autofokus-System

Country Status (7)

Country Link
US (1) US5434632A (de)
EP (1) EP0617306B1 (de)
JP (1) JP2863822B2 (de)
KR (1) KR100306826B1 (de)
CN (1) CN1076834C (de)
DE (1) DE69407078T2 (de)
SG (1) SG48354A1 (de)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0142783B1 (ko) * 1994-03-19 1998-07-15 구자홍 프로젝터의 경사면 투사시 화상보정장치 및 방법
EP0817157A3 (de) 1996-06-28 1998-08-12 Texas Instruments Incorporated Bildanzeigesystemen
JPH10333088A (ja) * 1997-05-28 1998-12-18 Canon Inc 投射画像の表示方法および投射型画像表示装置
JP3554172B2 (ja) * 1998-01-09 2004-08-18 キヤノン株式会社 放射線撮影装置
KR100447168B1 (ko) * 2001-07-12 2004-09-04 엘지전자 주식회사 투사형 광학 장치
JP3928623B2 (ja) * 2004-02-27 2007-06-13 カシオ計算機株式会社 投影装置、測距処理方法及びプログラム
US7278745B2 (en) * 2004-12-21 2007-10-09 Infocus Corporation Method and apparatus for adjusting relative disposition of projection optics based on operating conditions
WO2006068363A1 (en) * 2004-12-21 2006-06-29 Lg Electronics Inc. Thin type projector
KR100672506B1 (ko) * 2004-12-22 2007-01-24 엘지전자 주식회사 프로젝터의 투사 장치
KR100674810B1 (ko) 2005-03-09 2007-01-26 엘지전자 주식회사 보조광원이 구비된 프로젝터
DE102007055530A1 (de) * 2007-11-21 2009-05-28 Carl Zeiss Ag Laserstrahlbearbeitung
US8692880B2 (en) * 2010-10-05 2014-04-08 Mitutoyo Corporation Image correlation displacement sensor
US8605291B2 (en) 2010-12-01 2013-12-10 Mitutoyo Corporation Image correlation displacement sensor
US8576390B1 (en) * 2012-07-31 2013-11-05 Cognex Corporation System and method for determining and controlling focal distance in a vision system camera
US9689740B2 (en) * 2014-10-15 2017-06-27 The Boeing Company Diagnostic for spectrally combined laser
US10151962B2 (en) * 2016-09-29 2018-12-11 Mitutoyo Corporation Variable focal length lens system with focus monitoring and control
CN112904526B (zh) * 2021-01-21 2023-03-28 浙江大学 基于差动共焦探测具有抗噪能力的高精度自动对焦方法及装置
KR102384809B1 (ko) 2021-11-09 2022-04-08 주식회사 미래이앤아이 미끼 절단장치
CN115877391B (zh) * 2023-01-31 2023-06-13 宜科(天津)电子有限公司 一种检测物体距离的数据处理系统

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639048A (en) * 1970-07-23 1972-02-01 Eastman Kodak Co Automatic ranging and focusing projector
US3672757A (en) * 1970-09-14 1972-06-27 Gaf Corp Automatic focusing system for projectors and the like
US3856392A (en) * 1971-02-22 1974-12-24 Photoidetics Inc Automatic lens focusing method and apparatus
FR2518767A1 (fr) * 1981-12-17 1983-06-24 Centre Nat Etd Spatiales Procede de reglage automatique de la nettete d'images projetees sur un ecran et dispositifs pour la mise en oeuvre dudit procede
DE3219503C2 (de) * 1982-05-25 1985-08-08 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Vorrichtung zum selbsttätigen Fokussieren auf in optischen Geräten zu betrachtende Objekte
JPS6271810A (ja) * 1985-09-26 1987-04-02 Yokogawa Electric Corp 変位変換器
JPS62147128U (de) * 1986-03-11 1987-09-17
DE3751233T2 (de) * 1986-10-31 1995-08-24 Seiko Epson Corp Anzeigevorrichtung vom Projektionstyp.
NL8801348A (nl) * 1988-05-26 1989-12-18 Philips Nv Belichtingsstelsel.
US4926974A (en) * 1989-02-13 1990-05-22 Inventio Ag Elevator car with improved car door clutch
JPH02117719U (de) * 1989-03-01 1990-09-20
NL8901077A (nl) * 1989-04-28 1990-11-16 Koninkl Philips Electronics Nv Optische belichtingsstelsel en projectie-apparaat voorzien van een dergelijk stelsel.
JPH03141336A (ja) * 1989-10-27 1991-06-17 Canon Inc 投射型表示装置
JPH03149538A (ja) * 1989-11-07 1991-06-26 Seiko Epson Corp 投写型表示装置
JP2846041B2 (ja) * 1990-03-08 1999-01-13 キヤノン株式会社 画像投影装置
US5276523A (en) * 1990-03-08 1994-01-04 Canon Kabushiki Kaisha Liquid crystal television projector with automatic focus
JP2868834B2 (ja) * 1990-03-29 1999-03-10 コニカ株式会社 オートフォーカス装置
NL9001610A (nl) * 1990-07-16 1992-02-17 Philips Nv Beeldprojektie-inrichting.
JP2919585B2 (ja) * 1990-09-14 1999-07-12 三洋電機株式会社 投写型液晶表示装置
JPH04181935A (ja) * 1990-11-16 1992-06-29 Canon Inc 自動焦点検出手段を有した光学装置
US5235363A (en) * 1991-05-10 1993-08-10 Nview Corporation Method and apparatus for interacting with a computer generated projected image

Also Published As

Publication number Publication date
US5434632A (en) 1995-07-18
SG48354A1 (en) 1998-04-17
KR100306826B1 (ko) 2001-11-30
JP2863822B2 (ja) 1999-03-03
DE69407078D1 (de) 1998-01-15
CN1076834C (zh) 2001-12-26
JPH0713065A (ja) 1995-01-17
EP0617306B1 (de) 1997-12-03
KR940022122A (ko) 1994-10-20
EP0617306A1 (de) 1994-09-28
CN1093175A (zh) 1994-10-05

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V., EINDHOVEN, N

8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee