FR2147633A5 - Liquid crystal display - selectively transparent or opaque to light - Google Patents

Liquid crystal display - selectively transparent or opaque to light

Info

Publication number
FR2147633A5
FR2147633A5 FR7226558A FR7226558A FR2147633A5 FR 2147633 A5 FR2147633 A5 FR 2147633A5 FR 7226558 A FR7226558 A FR 7226558A FR 7226558 A FR7226558 A FR 7226558A FR 2147633 A5 FR2147633 A5 FR 2147633A5
Authority
FR
Grant status
Application
Patent type
Prior art keywords
light
cell
line
rear surface
opaque
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
Application number
FR7226558A
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.)
RCA Corp
Original Assignee
RCA Corp
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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00Scanning details of television systems
    • H04N3/10Scanning details of television systems by means not exclusively optical-mechanical
    • H04N3/14Scanning details of television systems by means not exclusively optical-mechanical by means of electrically scanned solid-state devices
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 for the control of the intensity, phase, polarisation or colour
    • G02F1/13Devices 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 for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of optical devices, e.g. polarisers, reflectors or illuminating devices, with the cell
    • G02F1/133524Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides

Abstract

The display is viewed from a direction such that the line of sight intersects the front surface of the liq. crystal cell. A series of gratings, adjacent the rear surface of the cell, permit illumination of the cell by light incident on the rear surface from all directions other than those coinciding with the line of sight. The cell can also, when it is in its opaque state, send light incident on its rear surface along the line of sight, when this light is emitted from a source which is not in line with the latter. The gratings are formed by parallel, non-reflecting, light absorbant, lamellae projecting from the cell rear surface.
FR7226558A 1969-08-25 1972-07-24 Liquid crystal display - selectively transparent or opaque to light Expired FR2147633A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05166192 US4021945A (en) 1969-08-25 1971-07-26 Liquid crystal device with louver means located behind the liquid crystal device

Publications (1)

Publication Number Publication Date
FR2147633A5 true true FR2147633A5 (en) 1973-03-09

Family

ID=22602188

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7226558A Expired FR2147633A5 (en) 1969-08-25 1972-07-24 Liquid crystal display - selectively transparent or opaque to light

Country Status (2)

Country Link
BE (1) BE786666A (en)
FR (1) FR2147633A5 (en)

Also Published As

Publication number Publication date Type
BE786666A (en) 1972-11-16 grant
BE786666A1 (en) grant

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Legal Events

Date Code Title Description
ST Notification of lapse