WO1988006305A1 - Dispositif optique - Google Patents

Dispositif optique Download PDF

Info

Publication number
WO1988006305A1
WO1988006305A1 PCT/DE1988/000076 DE8800076W WO8806305A1 WO 1988006305 A1 WO1988006305 A1 WO 1988006305A1 DE 8800076 W DE8800076 W DE 8800076W WO 8806305 A1 WO8806305 A1 WO 8806305A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
crystal plate
housing
floppy disk
optical device
Prior art date
Application number
PCT/DE1988/000076
Other languages
German (de)
English (en)
Inventor
Wolfgang Ort
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
Publication of WO1988006305A1 publication Critical patent/WO1988006305A1/fr

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

Definitions

  • the invention relates to an optical device for reproducing images, in particular an overhead projector, with a liquid crystal plate arranged in the image plane, an optical imaging system and a lamp and reflector arrangement accommodated in a housing.
  • the invention also relates to an optical device for reproducing images, in particular an overhead projector, with a liquid crystal plate arranged in the imaging plane with an underlying mirror surface and an imaging optics attached above the liquid crystal plate, as well as a lamp and reflector arrangement.
  • the invention is based on the object of developing overhead projectors of the type mentioned at the outset in such a way that their possible uses become more diverse beyond the known possibilities.
  • an overhead projector of the transmission type in that, in addition to the lamp and reflector arrangement, an externally accessible floppy disk drive is installed in the interior of the housing and is connected to a microprocessor such that the floppy disk is stored on an inserted floppy disk Data can be supplied as control signals to the liquid crystal panel.
  • an externally accessible floppy disk drive which is connected to a microprocessor, is installed beneath the liquid crystal plate and inside a housing carrying the liquid crystal plate, in such a way that the data stored on a floppy disk inserted can be supplied as control signals to the liquid crystal panel.
  • Fig. 1 shows an overhead projector in a diagram
  • FIG. 2 shows a block diagram of the overhead projector according to FIG. 1.
  • FIG. 1 shows an overhead projector of the transmission type, which consists of a housing 11, in which a lamp and reflector arrangement of a known type, not shown, is accommodated and on whose outer wall a column 12 is fastened in an upright position.
  • a holder 14 for receiving an optics 15 and a deflecting mirror 16 is attached in a height-adjustable manner by means of a support arm 13.
  • the upper side of the housing 11 facing the optics 15 is covered by a liquid crystal plate 17.
  • the controllable driver switching arrangement of the liquid crystal plate 17 is connected to a microprocessor 18 which is connected to a floppy disk drive 19.
  • the floppy disk drive 19 like the microprocessor 18, is accommodated inside the housing.
  • the floppy disk drive 19 assumes a vertical position provided laterally in the housing.
  • Floppy disks with stored data can be fed to the floppy disk drive 19 via a vertical slot 20.
  • Operating keys 21 and an input keyboard 22 are provided for operating the floppy disk drive 19.
  • the data stored on the floppy disk, such as writing and image, can be fed as signals via the microprocessor 18 to the driver circuitry of the liquid crystal element, as a result of which the physical properties of the liquid crystal element on the liquid crystal plate the optics 15 and the deflecting mirror 16 can be projected onto a projection screen.
  • signals are stored on the diskette in accordance with a text or illustrations by means of a computer, which signals are then routed to the liquid crystal plate 17 via the microprocessor 18 if necessary.
  • the conversion algorithm of the microprocessor 18 is designed in accordance with the operating system of the computer.
  • the main advantage of the subject matter of the invention is shown in that the texts and images supporting a lecture and to be projected can be stored on a diskette and then the diskette can be stored by the lecturer anywhere in an existing overhead projector in the slot 20 of the floppy disk drive must be inserted in order to make the images accompanying his presentation on a projection screen visible to a large group of listeners in an enlarged view.
  • the overhead projector itself can even be conveniently transported to any desired location.
  • the housing 11 can be made lower because the lamp and reflector arrangement is accommodated outside the housing, and the floppy disk drive 19 is expediently arranged in a horizontal position below the liquid crystal plate 17 inside the housing 11.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

Une unité d'entraînement de disquettes (19) et un microprocesseur (18) sont incorporés à l'intérieur du boîtier (11) d'un rétroprojecteur, de sorte que la commande d'une plaque à cristaux liquides (17) agencée sur le plan d'appui du projecteur se fait selon des données enregistrées sur une disquette. L'image ainsi reproduite sur la plaque à cristaux liquides (17) est projetée sur un écran par un dispositif d'éclairage et de réflexion, ainsi que par des éléments optiques (15) et un miroir déflecteur (16).
PCT/DE1988/000076 1987-02-17 1988-02-16 Dispositif optique WO1988006305A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3704927.5 1987-02-17
DE19873704927 DE3704927A1 (de) 1987-02-17 1987-02-17 Optische einrichtung

Publications (1)

Publication Number Publication Date
WO1988006305A1 true WO1988006305A1 (fr) 1988-08-25

Family

ID=6321127

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1988/000076 WO1988006305A1 (fr) 1987-02-17 1988-02-16 Dispositif optique

Country Status (2)

Country Link
DE (1) DE3704927A1 (fr)
WO (1) WO1988006305A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990006537A1 (fr) * 1988-12-02 1990-06-14 Eastman Kodak Company Systeme optique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61223726A (ja) * 1985-03-28 1986-10-04 Nec Corp 透過型液晶ユニツト付オ−バ−ヘツドプロジエクタ−装置
JPS61286830A (ja) * 1985-06-14 1986-12-17 Toshiba Corp ワ−ドプロセツサ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3506968A1 (de) * 1984-04-13 1985-10-17 Demolux Gmbh & Co Kg, 6070 Langen Overhead-projektor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61223726A (ja) * 1985-03-28 1986-10-04 Nec Corp 透過型液晶ユニツト付オ−バ−ヘツドプロジエクタ−装置
JPS61286830A (ja) * 1985-06-14 1986-12-17 Toshiba Corp ワ−ドプロセツサ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990006537A1 (fr) * 1988-12-02 1990-06-14 Eastman Kodak Company Systeme optique

Also Published As

Publication number Publication date
DE3704927A1 (de) 1988-08-25

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