DE3245931A1 - Liquid crystal display cell - Google Patents

Liquid crystal display cell

Info

Publication number
DE3245931A1
DE3245931A1 DE19823245931 DE3245931A DE3245931A1 DE 3245931 A1 DE3245931 A1 DE 3245931A1 DE 19823245931 DE19823245931 DE 19823245931 DE 3245931 A DE3245931 A DE 3245931A DE 3245931 A1 DE3245931 A1 DE 3245931A1
Authority
DE
Germany
Prior art keywords
liquid crystal
crystal display
display cell
cell according
back plate
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.)
Ceased
Application number
DE19823245931
Other languages
German (de)
Inventor
Konrad 7909 Dornstadt Brendle
Kurt 7914 Pfaffenhofen Fahrenschon
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19823245931 priority Critical patent/DE3245931A1/en
Publication of DE3245931A1 publication Critical patent/DE3245931A1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—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
    • G02F1/01—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 for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—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 for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—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
    • G02F1/01—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 for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—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 for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—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
    • G02F1/01—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 for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—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 for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—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
    • G02F1/01—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 for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—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 for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements
    • G02F1/133555—Transflectors

Abstract

It is proposed to dye at least one cover plate in order to improve the coloured display of a liquid crystal display.

Description

I I.

Beschreibung Flüssigkristall-Anzeigezelle Die vorliegende Erfindung betrifft eine Flüssigkristall Anzeigezelle mit einer zwischen einer lichtdurchlässigen Frontplatte und einer lichtdurchlässigen Rückplatte angeordneten Flüssigkristallschicht und einem im Strahlengang zwischen Flüssigkristallschicht und Betrachter angeordneten Farbfilter.Description of liquid crystal display cell The present invention relates to a liquid crystal display cell with a light transmissive between one Front panel and a transparent back panel arranged liquid crystal layer and one arranged in the beam path between the liquid crystal layer and the viewer Color filter.

Es ist bereits bekannt, an den Außenflächen von Flüssig.It is already known on the outer surfaces of liquid.

kristallzellen zur Erzielung einer farbigen Darstellung Farbfilter anzubringen, z.B. in der Weise, daß man eingefärbte Folien anbringt oder daß man farbselektive Polarisatoren verwendet. Die Farbsättigung, die Helligkeit sowie die Farbkontrolle insbesondere beim Wechsel von Auflichtbetrachtung in Durchlichtbetrachtung dieser bekannten Anordnungen können noch nicht voll befriedigen.crystal cells to achieve a colored representation Color filter to attach, e.g. in such a way that one attaches colored foils or that one color selective polarizers used. The color saturation, the brightness and the Color control especially when changing from incident light viewing to transmitted light viewing this well-known Orders cannot yet fully satisfy.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine eingangs genannte Anordnung insbesondere hinsichtlich Helligkeit, Farbsättigung und Farbtreue bei wechselnder Beleuchtungsweise zu verbessern.The present invention is therefore based on the object of a arrangement mentioned at the outset, in particular with regard to brightness, color saturation and to improve color fidelity with changing lighting.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Frontplatte und/oder die Rückplatte als Farbfilter ausgebildet sind.This object is achieved according to the invention in that the front panel and / or the back plate are designed as a color filter.

Durch die beschriebene Einfärbung der Deckplatten bzw.The coloring of the cover plates or

Deckfolien, also der eigentlichen Gehäuseteile der Flüssigkristall-Anzeigezelle ergibt sich ein verbesserter Farbeindruck, ohne daß die Helligkeit der Anzeigezelle und damit der Kontrast der Zelle zu stark verändert wird.Cover films, i.e. the actual housing parts of the liquid crystal display cell the result is an improved color impression without affecting the brightness of the display cell and thus the contrast of the cell is changed too much.

Offenbar ist die Ursache darin zu sehen, daß das farberzeugende Element möglichst nahe an der durch elektrische Felder steuerbaren Flüssigkristall'schicht angeordnet ist.Apparently the cause is to be seen in the fact that the color-producing element as close as possible to the liquid crystal layer controllable by electrical fields is arranged.

Besonders bei einer sogenannten nematischen Drehzelle, die durch Verwendung- eines teildurchlässigen Spiegels auf der Rückplatte sowohl für Auflichtbetrieb als auch für Durchlichtbetrieb geeignet ist, zeigt sich, daß sich der Farbton bei unterschiedlichen Betriebsweisen kaum ändert.Especially with a so-called nematic rotary cell, which is a partially transparent mirror on the back plate for both reflected light operation and is also suitable for transmitted light operation, it turns out that the color tone differs with different Modes of operation hardly changes.

Anhand des in der Figur schematisch dargestellten Ausführungsbeispiels wird die Erfindung nachfolgend näher erläutert.On the basis of the exemplary embodiment shown schematically in the figure the invention is explained in more detail below.

Die Figur zeigt im Querschnitt eine nematische Drehzelle, die sowohl im Auflicht als auch im Durchlicht betreibbar ist. Solche Anzeigezellen werden z.B. in Kraftfahrzeugen benötigt, wo sie bei Tag und bei Nacht mit möglichst gleicher Farbsättigung und mit gleichem Kontrast ablesbar sein sollen.The figure shows in cross section a nematic rotary cell which has both can be operated in incident light as well as in transmitted light is. Such display cells are required e.g. in motor vehicles, where they can be used during the day and at night as much as possible should be readable with the same color saturation and the same contrast.

Zwischen den ggf. flexiblen Deckplatten 2 und 3, wovon die dem Betrachter B zugewandte die Frontplatte 3 und die der Lichtquelle L zugewandte die Rückplatte 2 ist, befindet sich der nematische Flüssigkristall 1 als dünne, z.B. 10 p dicke Schicht. Zur Ansteuerung sind Elektroden 7 und 8 in Form von lichtdurchlässigen Schichten in bekannter Weise vorgesehen.Between the possibly flexible cover plates 2 and 3, of which the viewer B facing the front plate 3 and that facing the light source L is the back plate 2, the nematic liquid crystal 1 is thin, e.g., 10 p thick Layer. For control purposes, electrodes 7 and 8 are in the form of transparent ones Layers provided in a known manner.

Auf den Außenseiten der Deckplatten 2 und 3 befinden sich Polarisationsfilter 4 und 5. Ferner befindet sich auf der Rückplatte 2 noch eine halbdurchlässige reflektierende Fläche 6, der es ermöglicht, daß die mit der Zelle darstellbare Anzeige bei Tag im Auflicht und bei Nacht im Durchlicht ablesbar ist.There are polarization filters on the outside of the cover plates 2 and 3 4 and 5. There is also a semi-transparent reflective on the back plate 2 Area 6, which enables the display that can be displayed with the cell during the day can be read in incident light and in transmitted light at night.

Gemäß der vorliegenden Erfindung sind un die Frontplatte 3 und/oder die Rückplatte 2 als Farbfilter ausgebildet.According to the present invention are un the front panel 3 and / or the back plate 2 designed as a color filter.

Bevorzugt ist das Material der Substrate 2, 3 in der Masse mit Pigmenten eingefärbt. Die Lichtquelle L sendet bevorzugt weißes Licht aus und ist z.B. eine Glühbirne.The material of the substrates 2, 3 is preferably in the mass with pigments colored. The light source L preferably emits white light and is, for example, a Lightbulb.

Als Farbfilter eingefärbte und für die Deckplatten geeignete Glasplatten sind in großer Anzahl bekannt. Für flexible Anzeigezellen eignen sich besonders Kunststofffolien als Deckplatten. Als eingefärbte Kunststoffe sind solche auf der Basis von Polycarbonaten oder Metacrylaten besonders geeignet.Glass plates tinted as color filters and suitable for the cover plates are known in large numbers. They are particularly suitable for flexible display cells Plastic films as cover plates. Colored plastics are those on the Especially suitable based on polycarbonates or methacrylates.

LeerseiteBlank page

Claims (8)

Patentansprüche Flüssigkristallan;eigezelle mit einer zwischen einer chtdurchlässigen Frontplatte und einer lichtdurchlässigen Rückplatte angeordneten Flüssigkristallschicht und einem im Strahlengang zwischen Flüssigkristallschicht und Betrachter angeordneten Farbfilter, dadurch gekennzeichnet, daß die Frontplatte (3) und/oder die Rückplatte (2) als Farbfilter ausgebildet sind.Claims liquid crystal display cell with one between one Translucent front panel and a translucent rear panel arranged Liquid crystal layer and one in the beam path between the liquid crystal layer and viewer arranged color filter, characterized in that the front panel (3) and / or the back plate (2) are designed as color filters. 2. Flüssigkristallanzeigezelle nach Anspruch 1, dadurch gekennzeichnet, daß die Front- und/oder Rückplatte (2,3) aus in der Masse eingefärbtem Material bestehen.2. Liquid crystal display cell according to claim 1, characterized in that that the front and / or back plate (2,3) made of material colored in the mass exist. 3. Flüssigkristallanzeigezelle nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß die Front- und/ oder Rückplatte (2,3) aus eingefärbtem Glas bestehen.3. Liquid crystal display cell according to claim 1 or claim 2, characterized characterized in that the front and / or back plate (2,3) made of colored glass exist. 4. Flüssigkristallanzeigezelle nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet; daß die Front- und/ oder Rückplatte aus einem eingefärbten Kunststoff bestehen.4. Liquid crystal display cell according to claim 1 or claim 2, characterized marked; that the front and / or back plate made of a colored plastic exist. 5. Flüssigkristallanzeigezelle nach Anspruch 4, dadurch gekennzeichnet, daß die Front- und/oder Rückplatte aus flexiblem Kunststoff bestehen.5. Liquid crystal display cell according to claim 4, characterized in that that the front and / or back plate are made of flexible plastic. 6. Flüssigkristallanzeigezelle nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß auf der dem Betrachter abgewandten Seite der Flüssigkristallanzeigezelle eine reflektierende Fläche (6) angeordnet ist.6. Liquid crystal display cell according to one of claims 1 to 5, characterized characterized in that on the side of the liquid crystal display cell facing away from the viewer a reflective surface (6) is arranged. 7. Flüssigkristallanzeigezelle nach Anspruch 6, dadurch gekennzeichnet, daß die reflektierende Fläche (6) teildurchlässig ist und hinter der Flüssigkristallzelle eine Lichtquelle (L) vorgesehen ist.7. Liquid crystal display cell according to claim 6, characterized in that that the reflective surface (6) is partially transparent and behind the liquid crystal cell a light source (L) is provided. 8. Flüssigkristallanzeigezelle-nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Flüssigkristallzelle vom Typ einer nematischen Drehzelle ist.8. Liquid crystal display cell according to one of claims 1 to 7, characterized characterized in that the liquid crystal cell is of the nematic rotating cell type is.
DE19823245931 1982-12-11 1982-12-11 Liquid crystal display cell Ceased DE3245931A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823245931 DE3245931A1 (en) 1982-12-11 1982-12-11 Liquid crystal display cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823245931 DE3245931A1 (en) 1982-12-11 1982-12-11 Liquid crystal display cell

Publications (1)

Publication Number Publication Date
DE3245931A1 true DE3245931A1 (en) 1984-06-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19823245931 Ceased DE3245931A1 (en) 1982-12-11 1982-12-11 Liquid crystal display cell

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DE (1) DE3245931A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272194A1 (en) * 1986-12-15 1988-06-22 International Business Machines Corporation Liquid crystal display device having polychromatic glass color filters
EP1126311A3 (en) * 2000-02-19 2003-11-05 Siemens Aktiengesellschaft Display device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2148378A1 (en) * 1971-09-28 1973-04-05 Siemens Ag ARRANGEMENT FOR MULTICOLORED DATA DISPLAY

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2148378A1 (en) * 1971-09-28 1973-04-05 Siemens Ag ARRANGEMENT FOR MULTICOLORED DATA DISPLAY

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272194A1 (en) * 1986-12-15 1988-06-22 International Business Machines Corporation Liquid crystal display device having polychromatic glass color filters
EP1126311A3 (en) * 2000-02-19 2003-11-05 Siemens Aktiengesellschaft Display device

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