Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1984000271) ELECTRONIC IMAGING APPARATUS FOR PRODUCING STATIC LIGHT IMAGES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1984/000271 International Application No.: PCT/US1983/001001
Publication Date: 19.01.1984 International Filing Date: 01.07.1983
IPC:
G02F 1/055 (2006.01) ,G09G 3/00 (2006.01)
G PHYSICS
02
OPTICS
F
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01
for the control of the intensity, phase, polarisation or colour
03
based on ceramics or electro-optical crystals, e.g. exhibiting Pockels or Kerr effect
055
the active material being a ceramic
G PHYSICS
09
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
Applicants:
Inventors:
Priority Data:
null30.12.1899null
Title (EN) ELECTRONIC IMAGING APPARATUS FOR PRODUCING STATIC LIGHT IMAGES
(FR) DISPOSITIF ELECTRONIQUE DE MISE EN IMAGE POUR LA PRODUCTION D"IMAGES LUMINEUSES STATIQUES
Abstract:
(EN) Electronic imaging apparatus comprising an electro-optic device (50) which, upon being electrically addressed with image information and flood illuminated, provides a static two-dimensional light image display. The apparatus of the invention comprises electronic means (60, 51, 52, 13) for forming an electrostatic charge pattern (corresponding to the light image to be displayed) on a surface of an electro-optic panel (11). A pattern of electrodes (12) connected to a reference voltage (e.g. ground) cooperates with the charge pattern to produce light-modulating electric fields in the panel which, in turn, are used to imagewise modulate the intensity of light passing through the panel. The light image produced by the apparatus lasts until the charge pattern dissipates (which can take several hours, depending on the dielectric constant of the surface which supports the charge pattern).
(FR) Appareil électronique de mise en image comprenant un dispositif opto-électronique (50) qui, après avoir été adressé électriquement avec des informations d"images et après avoir été éclairé par diffusion, produit l"affichage d"une image lumineuse bidimensionnelle statique. Le dispositif de la présente invention comprend un organe électronique (60, 51, 52, 13) permettant de former un motif de charge électrostatique (correspondant à l"image lumineuse à afficher) sur une surface d"un panneau opto-électronique (11). Un agencement d"électrodes (12) reliées à une tension de référence (par exemple la masse) agit de concert avec le motif de charge pour produire des champs électriques de modulation de lumière dans le panneau, ces champs électriques étant utilisés à leur tour pour moduler en fonction de l"image l"intensité de la lumière traversant le panneau. L"image lumineuse produite par le dispositif dure jusqu"à ce que le motif de charge se dissipe (ce qui peut prendre plusieurs heures, en fonction de la constante diélectrique de la surface de support du motif de charge).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0112914