WO1990006537A1 - Optical system - Google Patents

Optical system Download PDF

Info

Publication number
WO1990006537A1
WO1990006537A1 PCT/EP1989/001455 EP8901455W WO9006537A1 WO 1990006537 A1 WO1990006537 A1 WO 1990006537A1 EP 8901455 W EP8901455 W EP 8901455W WO 9006537 A1 WO9006537 A1 WO 9006537A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
display panel
crystal display
scanning means
platen
Prior art date
Application number
PCT/EP1989/001455
Other languages
French (fr)
Inventor
Gerhard BRÄUNING
Original Assignee
Eastman Kodak Company
Kodak Aktiengesellschaft
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 Eastman Kodak Company, Kodak Aktiengesellschaft filed Critical Eastman Kodak Company
Priority to AT90900129T priority Critical patent/ATE91555T1/en
Publication of WO1990006537A1 publication Critical patent/WO1990006537A1/en

Links

Classifications

    • 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
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S353/00—Optics: image projectors
    • Y10S353/03—Transparent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S353/00—Optics: image projectors
    • Y10S353/05—Transparency holder accessories

Definitions

  • the invention relates to an optical system for projecting images, in particular an overhead projector, comprising a liquid crystal display panel arranged in the imaging plane, an optical imaging unit and a lamp and reflector arrangement accommodated in a housing as well as a scanning means for stored data.
  • DE-GM 8 702 326 discloses an overhead projector for selectively or jointly projecting information-carrying transparencies and liquid crystal display images, wherein a liquid crystal display panel is mounted on the housing surface such that it can be folded onto and unfolded from the platen as required.
  • a computer with exchangeable diskettes is accommodated so that the liquid crystal display panel is controlled in response to the data stored on a diskette.
  • a commercially available data strip scanning device which comprises an optical scanner by means of which infor ⁇ mation coded on a narrow data strip is scanned and can be pro ⁇ Defined in personal computers or system terminals.
  • a data strip scanning means is provided which is accessible from outside, in that a transparency which shows pictures, diagrams or the like and can be placed on the platen comprises a data strip for selective and/or joint projection with the liquid crystal images, said data strip extending into the area of the scanning means when the transparency is placed on the platen, and in that the data stored on the data strip can be supplied to the liquid crystal display panel in the form of control signals via a com ⁇ puter associated with said scanning means.
  • FIG. 1 The single Figure of the drawing shows in a perspective view an overhead projector which consists of a housing 11 which accommo ⁇ dates a lamp and reflector arrangement of a type known per se and not illustrated and on one outer wall of which a column 12 is mounted in an upright position.
  • a support arm 13 By means of a support arm 13 a holder 14 adapted to hold an optical system 15 as well as a deflecting mirror 16 is arranged on column 12 so as to be adjustable in height.
  • the upper side of housing 11, which faces the optical system 15, is covered by a liquid crystal display panel 17, the upper side of the liquid crystal display panel 17 being stable enough to serve as a platen 18.
  • a data strip scanning means 20 is built into a narrow housing portion 19 which extends across the whole length of the housing 11 in a rear extension of the platen 18, the opti ⁇ cal unit of said scanning means being accessible from outside via a slot 21.
  • Transparencies 23 showing in a known manner pictures, diagrams or the like can be placed on platen 18 for selective and/or joint projection with the liquid crystal images. These transparencies 23 are provided with one or several data strips 25 which may be produced by means of commercially available laser or pin writers and may include any type of information or program.
  • the area of the transparency 23 which carries the data strip 25 is moved across the entrance slot 21 into the area of the scanning means 20.
  • the data stored on the data strip 25 are optically scanned and supplied in the form of control signals to the liquid crystal display panel 17 via a computer associated with the scanning means so that specific images are generated on said display panel.
  • a considerable advantage of the subject matter of the invention consists in that the texts and images to be projected to support a lecture can be stored on the data strip so that in response to the data stored, the liquid crystal display panel can be con ⁇ trolled.
  • the image generated on the liquid crystal display panel supplements the contents of the transparency.
  • the images sup ⁇ porting a lecture can be jointly projected on a screen in an enlarged representation and thus made visible to a large audience.

Abstract

The invention relates to an overhead projector for projecting images, said projector including a liquid crystal display panel arranged in the imaging plane, an optical imaging unit and a lamp and reflector arrangement accommodated in a housing as well as a scanning means for stored data. Adjacent to the platen (18) covering the liquid crystal display panel (17), a data strip scanning means (20) is provided which is accessible from outside. A transparency (23) which shows pictures, diagrams or the like and can be placed on platen (18) comprises a data strip (25) for selective and/or joint projection with the liquid crystal images, said data strip extending into the area of the scanning means (20) when the transparency (23) is placed on platen (18). The data stored on data strip (25) can be supplied in the form of control signals to the liquid crystal display panel (17) via a computer associated with the scanning means (20) so that specific images can be generated on the liquid crystal display panel which supplement the contents of the transparency. In the case of a lecture, the information on the transparency and the images on the liquid crystal display panel can be jointly projected in an enlarged representation on a projection screen so that they can be viewed by a major audience.

Description

Optical System
The invention relates to an optical system for projecting images, in particular an overhead projector, comprising a liquid crystal display panel arranged in the imaging plane, an optical imaging unit and a lamp and reflector arrangement accommodated in a housing as well as a scanning means for stored data.
DE-GM 8 702 326 discloses an overhead projector for selectively or jointly projecting information-carrying transparencies and liquid crystal display images, wherein a liquid crystal display panel is mounted on the housing surface such that it can be folded onto and unfolded from the platen as required. Within the projector housing or in a bottom portion thereof, a computer with exchangeable diskettes is accommodated so that the liquid crystal display panel is controlled in response to the data stored on a diskette.
Moreover, a commercially available data strip scanning device is known which comprises an optical scanner by means of which infor¬ mation coded on a narrow data strip is scanned and can be pro¬ cessed in personal computers or system terminals.
It is the object of the invention to develop an overhead pro¬ jector of the above-mentioned generic type and a data strip scanning device such that they can be used for a greater variety of purposes. In accordance with the invention this object is attained in that adjacent to the platen covering the liquid crystal display panel, a data strip scanning means is provided which is accessible from outside, in that a transparency which shows pictures, diagrams or the like and can be placed on the platen comprises a data strip for selective and/or joint projection with the liquid crystal images, said data strip extending into the area of the scanning means when the transparency is placed on the platen, and in that the data stored on the data strip can be supplied to the liquid crystal display panel in the form of control signals via a com¬ puter associated with said scanning means.
The invention is described with reference to the embodiment illustrated in the drawing.
The single Figure of the drawing shows in a perspective view an overhead projector which consists of a housing 11 which accommo¬ dates a lamp and reflector arrangement of a type known per se and not illustrated and on one outer wall of which a column 12 is mounted in an upright position. By means of a support arm 13 a holder 14 adapted to hold an optical system 15 as well as a deflecting mirror 16 is arranged on column 12 so as to be adjustable in height.
The upper side of housing 11, which faces the optical system 15, is covered by a liquid crystal display panel 17, the upper side of the liquid crystal display panel 17 being stable enough to serve as a platen 18.
In the embodiment, a data strip scanning means 20 is built into a narrow housing portion 19 which extends across the whole length of the housing 11 in a rear extension of the platen 18, the opti¬ cal unit of said scanning means being accessible from outside via a slot 21. Transparencies 23 showing in a known manner pictures, diagrams or the like can be placed on platen 18 for selective and/or joint projection with the liquid crystal images. These transparencies 23 are provided with one or several data strips 25 which may be produced by means of commercially available laser or pin writers and may include any type of information or program.
When a transparency 23 is placed on the platen in the direction of the arrow, the area of the transparency 23 which carries the data strip 25 is moved across the entrance slot 21 into the area of the scanning means 20. The data stored on the data strip 25 are optically scanned and supplied in the form of control signals to the liquid crystal display panel 17 via a computer associated with the scanning means so that specific images are generated on said display panel.
A considerable advantage of the subject matter of the invention consists in that the texts and images to be projected to support a lecture can be stored on the data strip so that in response to the data stored, the liquid crystal display panel can be con¬ trolled. The image generated on the liquid crystal display panel supplements the contents of the transparency. The images sup¬ porting a lecture can be jointly projected on a screen in an enlarged representation and thus made visible to a large audience.

Claims

Patent Claim
1. Optical system for projecting images, in particular an over¬ head projector, comprising a liquid crystal display panel arranged in the imaging plane, an optical imaging unit and a lamp and reflector arrangement accommodated in a housing as well as a scanning means for stored data, c h a r a c t e r i z e d in that adjacent to the platen (18) covering the liquid crystal display panel (17) , a data strip scanning means (20) is provided which is accessible from out¬ side, in that a transparency (23) which shows pictures, dia¬ grams or the like and can be placed on the platen (18) com¬ prises a data strip (25) for selective and/or joint pro¬ jection with the liquid crystal images, said data strip extending into the area of the scanning means (20) when the transparency (23) is placed on the platen (18) , and in that the data stored on the data strip (25) can be supplied to the liquid crystal display panel (17) in the form of control signals via a computer associated with said scanning means (20).
PCT/EP1989/001455 1988-12-02 1989-12-01 Optical system WO1990006537A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90900129T ATE91555T1 (en) 1988-12-02 1989-12-01 OPTICAL SYSTEM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3840628.4 1988-12-02
DE3840628A DE3840628A1 (en) 1988-12-02 1988-12-02 OPTICAL INTERIOR

Publications (1)

Publication Number Publication Date
WO1990006537A1 true WO1990006537A1 (en) 1990-06-14

Family

ID=6368317

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1989/001455 WO1990006537A1 (en) 1988-12-02 1989-12-01 Optical system

Country Status (5)

Country Link
US (1) US5159363A (en)
EP (1) EP0447433B1 (en)
JP (1) JPH04502068A (en)
DE (2) DE3840628A1 (en)
WO (1) WO1990006537A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014950A2 (en) * 1993-11-28 1995-06-01 A.D.P. Adaptive Visual Perception Ltd. Viewing apparatus and work station
US5890305A (en) * 1989-12-31 1999-04-06 Smartlight Ltd. Self-masking transparency viewing apparatus
US5963276A (en) * 1997-01-09 1999-10-05 Smartlight Ltd. Back projection transparency viewer with overlapping pixels
US6311419B1 (en) 1989-12-31 2001-11-06 Smartlight Ltd. Dedicated mammogram viewer

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5317436A (en) * 1990-12-31 1994-05-31 Kopin Corporation A slide assembly for projector with active matrix moveably mounted to housing
US5396304A (en) * 1990-12-31 1995-03-07 Kopin Corporation Slide projector mountable light valve display
US5302985A (en) * 1992-03-31 1994-04-12 Minnesota Mining And Manufacturing Company Overhead projector for LCD panel
US5325218A (en) * 1992-12-31 1994-06-28 Minnesota Mining And Manufacturing Company Cholesteric polarizer for liquid crystal display and overhead projector
US5664859A (en) * 1994-01-03 1997-09-09 Kopin Corporation Projection display docking system
US6474819B2 (en) * 2000-03-21 2002-11-05 Texas Instruments Incorporated Combination overhead projector and electronic display device
US20020191232A1 (en) * 2001-06-18 2002-12-19 Orozco Genaro Antonio Fernandez Overhead slide projector with output capabilities
US20040095562A1 (en) * 2002-11-20 2004-05-20 John Moffatt Combination scanner/projector
US7637620B2 (en) * 2006-03-21 2009-12-29 Marvell International Technology Ltd. Lid structure, apparatus and method for displaying graphical information

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003384A1 (en) * 1985-11-28 1987-06-04 Oestberg Olof An image scanning and projecting apparatus
WO1988006305A1 (en) * 1987-02-17 1988-08-25 Eastman Kodak Company Optical device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7836850U1 (en) * 1979-09-13 Demolux Gmbh & Co Kg, 6070 Langen Overhead projector with a housing
DE2853644A1 (en) * 1978-12-13 1980-07-03 Demolux Teaching aid with overhead projector - has control strip adjacent screen with optical or magnetic signals controlling programme and reading head
JPS59202443A (en) * 1983-04-30 1984-11-16 Fuji Xerox Co Ltd Sheet used for overhead projector
JPS59202442A (en) * 1983-04-30 1984-11-16 Fuji Xerox Co Ltd Overhead projector
FR2559923B1 (en) * 1984-02-22 1986-12-26 Commissariat Energie Atomique SYSTEM FOR THE COMMON PROJECTION OF TRANSPARENT DOCUMENTS OR SLIDES ON A WALL SCREEN
US4765734A (en) * 1986-05-22 1988-08-23 Pakon, Inc. Digitally encoded alpha-numeric projector slide and systems for using the same
DE3712999A1 (en) * 1987-02-16 1988-08-25 Demolux OVERHEAD PROJECTOR
DE3710628A1 (en) * 1987-03-31 1988-10-20 Demolux OVERHEAD PROJECTOR
US4991956A (en) * 1989-03-02 1991-02-12 Griffin Stephen L Apparatus for facilitating correlation with a transparency image

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003384A1 (en) * 1985-11-28 1987-06-04 Oestberg Olof An image scanning and projecting apparatus
WO1988006305A1 (en) * 1987-02-17 1988-08-25 Eastman Kodak Company Optical device

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 8942 Derwent Publications Ltd., London, GB; Class P82, AN 89-306973 ANONYMOUS: " Electronic projection and image storage device - has magnetic store operable with projector scanner and printer to produce required information display and storage" & RESEARCH DISCLOSURE, vol. 305, no. 068, 10 September 1989, EMSWORTH, GB *
Patent Abstracts of Japan, Vol 9, No 68, P344, abstract of JP 59-202442, (FUJI XEROX K.K), publ 1984-11-16 *
Patent Abstracts of Japan, Vol 9, No 68, P344, abstract of JP 59-202443, (FUJI XEROX K.K), publ 1984-11-16. *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5890305A (en) * 1989-12-31 1999-04-06 Smartlight Ltd. Self-masking transparency viewing apparatus
US6279253B1 (en) 1989-12-31 2001-08-28 Smartlight Ltd. Self-masking transparency viewing apparatus
US6311419B1 (en) 1989-12-31 2001-11-06 Smartlight Ltd. Dedicated mammogram viewer
WO1995014950A2 (en) * 1993-11-28 1995-06-01 A.D.P. Adaptive Visual Perception Ltd. Viewing apparatus and work station
WO1995014950A3 (en) * 1993-11-28 1995-08-10 Adaptive Visual Perception Viewing apparatus and work station
US5760851A (en) * 1993-11-28 1998-06-02 Smartlight Ltd. Display device
US5790216A (en) * 1993-11-28 1998-08-04 Smartlight Ltd. Viewing apparatus and work station
US5835173A (en) * 1993-11-28 1998-11-10 Smartlight Ltd Transparency viewing device comprising passive matrix LCD
US5859676A (en) * 1993-11-28 1999-01-12 Smartlight Ltd. Self-masking viewing apparatus
US5963276A (en) * 1997-01-09 1999-10-05 Smartlight Ltd. Back projection transparency viewer with overlapping pixels

Also Published As

Publication number Publication date
DE3840628A1 (en) 1990-06-28
US5159363A (en) 1992-10-27
DE68907612T2 (en) 1994-02-10
EP0447433A1 (en) 1991-09-25
JPH04502068A (en) 1992-04-09
DE68907612D1 (en) 1993-08-19
EP0447433B1 (en) 1993-07-14

Similar Documents

Publication Publication Date Title
EP0447433B1 (en) Optical system
US4964066A (en) Device for editing and displaying data recorded on specialized sheets or records
EP0730255A1 (en) Optical reproducing system for multimedia information
JPH0317430B2 (en)
EP0299479B1 (en) Image display system
US4107741A (en) Data generating and recording system for scanning a display tube screen
JPH0329193Y2 (en)
JPH0294863A (en) Recording device for writing on board
JPH03127545A (en) Electronic blackboard
JP2003152927A (en) Electronic blackboard system
US3763575A (en) Programmed information transmittal apparatus
JPS63144336A (en) Ohp device and liquid crystal output device for ohp device
JPH10229463A (en) Electronic blackboard
JPS5940657Y2 (en) Display device for input device
JPS61154356A (en) Microfilm picture reproducing device
JPS60230125A (en) Original reading and projecting device
JP2852598B2 (en) Overhead projector
CA1306298C (en) Digitally encoded alpha-numeric projector slide and systems for using the same
JPH053945B2 (en)
JP2808889B2 (en) Reader
JPH0313168A (en) Original reader
JP2005175737A (en) Data presentation apparatus
JPH02211436A (en) Overhead projector with image storing and displaying function
JPH03211099A (en) Table white board
JPS63191138A (en) Overhead projector

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1990900129

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1990900129

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1990900129

Country of ref document: EP