WO1987003384A1 - Appareil d'analyse et de projection d'image - Google Patents

Appareil d'analyse et de projection d'image Download PDF

Info

Publication number
WO1987003384A1
WO1987003384A1 PCT/SE1986/000540 SE8600540W WO8703384A1 WO 1987003384 A1 WO1987003384 A1 WO 1987003384A1 SE 8600540 W SE8600540 W SE 8600540W WO 8703384 A1 WO8703384 A1 WO 8703384A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
microprocessor
liquid crystal
projecting
original
Prior art date
Application number
PCT/SE1986/000540
Other languages
English (en)
Inventor
Olof ÖSTBERG
Takeda Tsunehiro
Iida Takeo
Fukui Yukio
Original Assignee
Oestberg Olof
Takeda Tsunehiro
Iida Takeo
Fukui Yukio
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 Oestberg Olof, Takeda Tsunehiro, Iida Takeo, Fukui Yukio filed Critical Oestberg Olof
Publication of WO1987003384A1 publication Critical patent/WO1987003384A1/fr
Priority to NO873122A priority Critical patent/NO873122L/no
Priority to DK390087A priority patent/DK390087A/da

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/387—Composing, repositioning or otherwise geometrically modifying originals
    • H04N1/3871—Composing, repositioning or otherwise geometrically modifying originals the composed originals being of different kinds, e.g. low- and high-resolution originals
    • 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

Definitions

  • the invention relates to an apparatus for projecting an image or a picture on a screen.
  • overhead projectors are widely used in a variety of research institutes and educational organs.
  • the overhead projector proves to be quite useful, it still 10 causes several problems, for exampel, distortion of figures or images projected onto a screen, and in addition, due to relatively large size of the overhead projector sheets, transport and control thereof also involves difficulty.
  • the object of the present invention is to provide a useful image projection and display device which is capable of easily projecting a wide variety of data while still retaining the functional convenience of the overhead projector itself and also is 20 provided with useful functions for preparing and storing a variety of data by using a built-in input device and memory.
  • the projected ⁇ image can also easily be changed or altered i.a. for preventing or correcting distortion induced by the optical elements.
  • an image scanning 25 and projecting apparatus comprising an image detector for detecting the image of an original; a microprocessor for inputting the original image from said image detector as an electronic input signal therein, said microprocessor being capable of conversion and edition of said image signals; input means and memory means for inputting characters, figures etc into said microprocessor and storing signals used by the microprocessor; a liquid crystal plate for displaying an assembled image corresponding to the original image and said further characters, figures etc in accordance with output signals from said microprocessor; and an optical projecting device for projecting said assembled image displayed on said liquid crystal plate onto a screen.
  • the optical projecting device comprises a light source, a reflector mirror and a condensing lens; a Fresnel lens, a transparent heat absorbing sheet and a Liquid crystal panel, said three elements being combined into a group; and a projecting Lens for projecting the image displayed on the panel on a distant screen.
  • the microprocessor may be adapted to process the image signals received from the detector for correcting, changing and editing parts of the electronic image signals.
  • the microprocessor may be adapted to store the image signals received from the detector and possibly processed as stated above in the memory means.
  • the Liquid crystal panel comprises a sufficient number of picture elements or pixels for allowing the original optical image to be clearly displayed.
  • the original document is first scanned by the image detector, thence converted into an electronically mapped image before being delivered to the microprocessor.
  • the microprocessor synthesizes characters and/or figures delivered from the input means and memory means and then outputs the synthesized data signal containing the images to the liquid crystal display panel of the optical image projector to allow the original to be displayed in the liquid crystal display panel.
  • the image projection and display device embodied by the present invention immediately scans the image without obliging the operator to prepare any overhead sheet in advance before projection is implemented.
  • the image projection and display device reflecting the present invention stores the original in the memory of the micro ⁇ processor in the form of an electronically mapped image before displaying it via the Liquid crystal display panel, it is possible for the system to easily process the imaged content and specially add overlapping characters and/or figures on the imaged content. Furthermore, by applying simple deformation, the projected image totally dispenses with distortion, thus eventually promoting overall usefulness of this image projecting system. In addition, by effectively using the build-in recording media such as micro floppy disks and IC cards, lecturers can easily carry drafts designated for projection and display.
  • Fig. 1 is a schematic view of the apparatus according to the invention.
  • Reference numeral 1 denotes the optical image projector device.
  • Reference numeral 2 denotes an image signal generator. Image video signals generated by said signal generator 2 is eventually projected against a screen (not shown).
  • the optical image projector 1 comprises the following items; a light source 3 which is interposed between a reflection mirror 4 positioned therebehind and a lens 5 positioned in front of it.
  • a Fresnel lens 7, a transparent heat-absorbing sheet 8, and a liquid crystal display panel 9 for displaying characters and figures, are respectively placed adjacent each other in a light-path from a mirror 6 which is placed in front of lens 5.
  • Image projection means comprising a lens 10 and a mirror 11 is placed in front of the Fresnel lens 7, the heat-absorbing sheet 8, and the liquid crystal display panel 9.
  • liquid crystal display panel 9 comprises a specific number of picture elements, said number of elements or pixels being sufficient for allowing the original optical image comprising characters and figures to be clearly displayed on the screen after the light beams passing through the panel 9.
  • the transparent heat-absorbing sheet 8 protects said liquid crystal display panel 9 from the heat of the light source 3.
  • the image signal generator 2 feeding signals to said liquid crystal display panel 9 generates electrical signals corresponding to the image of an original but may optionally be collected from a variety of other originals including books, pamphlets, overhead projector sheets, and slide films.
  • Said signal generator 2 comprises an image detector 16 which has photographic elements converting the image 15 into electrical signals, the image detector 16 being connected to microprocessor 17 which is provided with data-input devices 18, such as keyboard and mouse means, and memory means 19 such as ROM, RAM, floppy disks, IC card, etc.
  • Micro processor 17 synthesizes a wide variety of signals related to electronically mapped images of the designated original scanned by the image detector 16 as well as signals relating to characters and figures delivered from data-input device 18 and memory means 19, and eventually outp ' uts the synthesized or assembled image signals.
  • the microprocessor 17 also corrects, changes, and edits part of the image by executing a variety of operations.
  • the microprocessor 17 eliminates distortion from the images otherwise being inherent to any conventional overhead projector image.
  • the microprocessor 17 causes memory means 19 to store all the images including characters and figures in any of said ROM, RAM, ⁇ floppy disks, and IC cards. Since the microprocessor 17 is connected
  • liquid crystal display panel 9 receives the image video signals from the microprocessor 17, and as a result, liquid crystal display panel 9 can correctly display the assembled image for the following projection.
  • the image detector 16 when operating the image scanning and display 10 device embodied by the present invention, the image detector 16 first scans the image of the original 15. Then, the video signal denoting said original is delivered to microprocessor 17 in the form of an electronically mapped image. The microprocessor 17 receives character data from data-input device 18 as required before 15 synthesizing or assembling the designated input data into video signals to be displayed. These complete video signals are then delivered to liquid crystal display panel 9 for display.
  • beams from the light source 3 penetrate the liquid crystal display panel 9, and are then reflected by mirror 11 20 before the image displayed on the panel is eventually projected on a screen.
  • the image scanning and display device reflecting the present invention can also be simply and inexpensively constructed by modifying part of any conventional ovenhead projector and by 25 providing the modified unit with the image signal generator 2.

Abstract

Un détecteur d'image (16) analyse un original et introduit le signal d'image dans un microprocesseur (17) capable de convertir et de mettre en forme les signaux d'image. Un organe d'entrée (18) et un organe de mémoire (19) permettent d'introduire dans ledit microprocesseur des caractères, des chiffres, etc. Une plaque à cristaux liquides (9) permet d'afficher une image assemblée correspondant à l'image originale ainsi que les autres caractères, chiffres etc, en fonction des signaux de sortie provenant dudit microprocesseur en vue de projeter sur un écran l'image assemblée affichée sur la plaque à cristaux liquides (9). Le microprocesseur est conçu pour traiter les signaux d'image reçus du détecteur (16) en vue de corriger, modifier et mettre en forme des parties des signaux de l'image électronique.
PCT/SE1986/000540 1985-11-28 1986-11-26 Appareil d'analyse et de projection d'image WO1987003384A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NO873122A NO873122L (no) 1985-11-28 1987-07-27 Apparat til skanning og fremvisning av en avbildning.
DK390087A DK390087A (da) 1985-11-28 1987-07-27 Billedskanderings- og projektionsapparat

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP26821785A JPS62127724A (ja) 1985-11-28 1985-11-28 撮像投影装置
JP60/268217 1985-11-28

Publications (1)

Publication Number Publication Date
WO1987003384A1 true WO1987003384A1 (fr) 1987-06-04

Family

ID=17455539

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1986/000540 WO1987003384A1 (fr) 1985-11-28 1986-11-26 Appareil d'analyse et de projection d'image

Country Status (3)

Country Link
JP (1) JPS62127724A (fr)
ES (1) ES2003553A6 (fr)
WO (1) WO1987003384A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355627A2 (fr) * 1988-08-17 1990-02-28 In Focus Systems, Inc. Méthode et dispositif pour une transparence électronique
WO1990006537A1 (fr) * 1988-12-02 1990-06-14 Eastman Kodak Company Systeme optique
US5231434A (en) * 1992-03-31 1993-07-27 Minnesota Mining And Manufacturing Company Overhead projector for LCD panel
EP0977418A2 (fr) * 1998-07-31 2000-02-02 Rollei Fototechnic GmbH Projecteur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63168433U (fr) * 1987-04-23 1988-11-02

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033685A (en) * 1974-01-12 1977-07-05 Canon Kabushiki Kaisha Film reader

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59229545A (ja) * 1983-06-11 1984-12-24 Yamatake Honeywell Co Ltd 自動投影装置
JPS60213935A (ja) * 1984-04-09 1985-10-26 Usac Electronics Ind Co Ltd オ−バヘツドプロジエクタ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033685A (en) * 1974-01-12 1977-07-05 Canon Kabushiki Kaisha Film reader

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACT OF JAPAN; & JP,A,60 041 032 (CANON KK), 4 March 1985. *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355627A2 (fr) * 1988-08-17 1990-02-28 In Focus Systems, Inc. Méthode et dispositif pour une transparence électronique
EP0355627A3 (fr) * 1988-08-17 1992-12-09 In Focus Systems, Inc. Méthode et dispositif pour une transparence électronique
WO1990006537A1 (fr) * 1988-12-02 1990-06-14 Eastman Kodak Company Systeme optique
US5159363A (en) * 1988-12-02 1992-10-27 Eastman Kodak Company Optical system
US5231434A (en) * 1992-03-31 1993-07-27 Minnesota Mining And Manufacturing Company Overhead projector for LCD panel
EP0977418A2 (fr) * 1998-07-31 2000-02-02 Rollei Fototechnic GmbH Projecteur
EP0977418A3 (fr) * 1998-07-31 2001-07-18 Rollei Fototechnic GmbH Projecteur

Also Published As

Publication number Publication date
JPS62127724A (ja) 1987-06-10
ES2003553A6 (es) 1988-11-01

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