DE102008014608A1 - LCD unit for use in e.g. cabriolet, has diaphragm-liquid crystal cell arranged in front of display field, where entry of light e.g. solar radiation, from viewer side towards display field is reduced or blocked - Google Patents
LCD unit for use in e.g. cabriolet, has diaphragm-liquid crystal cell arranged in front of display field, where entry of light e.g. solar radiation, from viewer side towards display field is reduced or blocked Download PDFInfo
- Publication number
- DE102008014608A1 DE102008014608A1 DE102008014608A DE102008014608A DE102008014608A1 DE 102008014608 A1 DE102008014608 A1 DE 102008014608A1 DE 102008014608 A DE102008014608 A DE 102008014608A DE 102008014608 A DE102008014608 A DE 102008014608A DE 102008014608 A1 DE102008014608 A1 DE 102008014608A1
- Authority
- DE
- Germany
- Prior art keywords
- liquid crystal
- display unit
- crystal display
- unit according
- crystal element
- 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.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 94
- 210000002858 crystal cell Anatomy 0.000 title claims abstract description 16
- 230000005855 radiation Effects 0.000 title abstract 2
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 230000010287 polarization Effects 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 210000002421 cell wall Anatomy 0.000 claims description 6
- 239000006059 cover glass Substances 0.000 claims description 5
- 239000004990 Smectic liquid crystal Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000003570 air Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
- G02F1/13476—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which at least one liquid crystal cell or layer assumes a scattering state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J3/00—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles
- B60J3/04—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles adjustable in transparency
-
- 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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133311—Environmental protection, e.g. against dust or humidity
-
- 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
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
- G02F1/133385—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell with cooling means, e.g. fans
-
- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13781—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering using smectic liquid crystals
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/50—Protective arrangements
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Flüssigkristallanzeigeeinheit mit einem Flüssigkristallelement, dessen Anzeigefeld beobachterseitig von einer Abschattungseinrichtung gegen Lichtbeaufschlagung abschattbar ist.The The invention relates to a liquid crystal display unit with a liquid crystal element, its display field observer side of a shading device Shadowable against exposure to light.
Die optischen Eigenschaften von Flüssigkristallanzeigen sind temperaturabhängig. Bei Flüssigkristallanzeigen, die wie bei einem Motorrad oder einem Cabriolet insbesondere im Freien betrieben werden, kann dies dazu führen, dass die Anzeige bei hoher Umgebungstemperatur und zusätzlicher Eigenerwärmung durch Sonneneinstrahlung nicht mehr ablesbar ist, da der Klärpunkt der Flüssigkristallsubstanz erreicht oder sogar überschritten wird.The optical properties of liquid crystal displays are temperature dependent. For liquid crystal displays, like a motorcycle or a cabriolet, especially in the When operated outdoors, this may cause the ad to appear high ambient temperature and additional self-heating through Sunlight is no longer readable, since the clear point of the liquid crystal substance reached or even exceeded becomes.
Vor allem im Aus- oder Stand-by-Modus von Flüssigkristallanzeigen, bei dem Anzeigen im negativ Mode, die im An-Zustand bzw. mit elektrischem Feld transmissiv und im Aus-Zustand bzw. ohne elektrisches Feld gesperrt sind, sehr dunkel bis völlig schwarz sind, führt dies dazu, dass die Anzeigen im ersten Moment nach Inbetriebnahme nicht ablesbar sind.In front especially in the off or standby mode of liquid crystal displays, in which Displays in negative mode, in the on state or with electrical Field transmissive and in off-state or without electric field are locked, very dark to completely black are leads This causes the ads to start up at the first moment are not readable.
Erst, wenn eine Kühlung der Anzeige z. B. durch Bewegung der Umgebungsluft wie z. B. bei Anzeigen an Motorrädern oder durch ein Kühlsystem erreicht wird, ist ein Ablesen der Anzeige wieder möglich.First, if a cooling the ad z. B. by moving the ambient air such. B. at Ads on motorcycles or by a cooling system is reached, a reading of the display is possible again.
Um eine sonnenbedingte Aufheizung der Flüssigkristallanzeige zu vermeiden ist es bekannt die Flüssigkristallanzeige entweder mechanisch abzuschatten oder im Aus-Zustand so wegzuklappen, dass keine Sonnenbeaufschlagung der Anzeige erfolgt.Around to avoid a sun-caused heating of the liquid crystal display it is known the liquid crystal display either mechanically shadow or fold away in the off state so that no exposure to the sun takes place.
Bei Vorhandensein eines Kühlsystems wird dies dazu benutzt die Temperatur der Anzeige möglichst schnell auf einen akzeptablen Wert zu reduzieren.at Presence of a cooling system if this is used the temperature of the display is as much as possible quickly reduce to an acceptable level.
Aufgabe der Erfindung ist es eine Flüssigkristallanzeige der eingangs genannten Art zu schaffen, die bei einfachem Aufbau auch bei hoher Umgebungstemperatur und Sonneneinstrahlung insbesondere nach einer Inbetriebnahme der Anzeige sofort ablesbar ist.task The invention is a liquid crystal display to create the type mentioned, the simple structure even at high ambient temperatures and sunlight in particular after a commissioning of the display is immediately readable.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass beobachterseitig vor dem Anzeigefeld des Flüssigkristallelements eine Blende angeordnet ist, durch die ein Lichtdurchtritt von der Beobachterseite her zum Anzeigefeld reduzierbar oder blockierbar und Licht von dem Anzeigefeld zur Beobachterseite hin zumindest weitgehend ungehindert durchlassbar ist.These Task is inventively characterized solved, that observer side in front of the display panel of the liquid crystal element, a diaphragm is arranged, through which a light passage from the observer side can be reduced or blocked to the display panel and light from the Display panel to the observer side out at least largely freely passable is.
Durch diese verschleißfreie Ausbildung wird durch Abschattung des Flüssigkristallelements ein Aufheizen der Flüssigkristallsubstanz zum oder sogar über den Klärpunkt vermieden, so daß bei einer Inbetriebnahme der Anzeige sofort eine Ablesbarkeit gegeben ist.By this wear-free Training is by shading the liquid crystal element a heating the liquid crystal substance to or even over the clearing point avoided, so that at commissioning of the display immediately given a readability is.
Gleichzeitig wird eine aufwendige und erheblichen Bauraum erfordernde Mechanik zur Abschattung vermieden.simultaneously is a complex and considerable space requiring mechanics avoided for shading.
Damit von der durch das Sonnenlicht aufgeheizten Blende die Wärme nicht durch direkte thermische Verbindung auf das Flüssigkristallelement übertragen wird, kann die Blende einen Spalt bildend in einem Abstand vor dem Flüssigkristallelement angeordnet sein.In order to from the aperture heated by the sunlight, the heat is not transferred by direct thermal connection to the liquid crystal element is, the aperture can form a gap at a distance in front of the liquid crystal element be arranged.
Der Abstand sollte mindestens 0,5 mm betragen.Of the Distance should be at least 0.5 mm.
Vorzugsweise beträgt der Abstand zwischen 2 mm und 10 mm, insbesondere zwischen 3 mm und 4 mm.Preferably is the distance between 2 mm and 10 mm, in particular between 3 mm and 4 mm.
Nach der Inbetriebnahme der Flüssigkristallanzeigeeinheit und Durchlässigschaltung der Blende kann durch eine Kühlung das Flüssigkristallelement kühlbar sein.To the commissioning of the liquid crystal display unit and transmissive circuit The aperture can be cooled by a the liquid crystal element can be cooled.
Dazu kann durch die Kühleinrichtung ein Kühlluftstrom über die beobachterseitige Fläche und/oder über die beobachterabgewandte Fläche des Flüssigkristallelements leitbar sein.To can through the cooling device a cooling air flow over the observer-side surface and / or over the Observer turned away surface of the liquid crystal element be conductive.
Vorzugsweise ist dabei der Kühlluftstrom durch den Spalt zwischen Flüssigkristallelement und Blende leitbar.Preferably is the cooling air flow through the gap between liquid crystal element and aperture conductive.
Zur Energieeinsparung bei nicht in Betrieb befindlicher Flüssigkristallanzeigeeinheit kann die Kühleinrichtung gemeinsam mit dem Flüssigkristallelement aktiv und inaktiv schaltbar sein.to Energy saving when the liquid crystal display unit is not in operation can the cooling device together with the liquid crystal element be active and inactive switchable.
Zum Schutz gegen mechanische Beschädigung der Blende kann beobachterseitig vor der Blende ein Deckglas angeordnet sein.To the Protection against mechanical damage the aperture can be observer side of the aperture arranged a cover glass be.
Eine Ausbildungsmöglichkeit besteht darin, dass die Blende eine Blendenflüssigkristallzelle ist, die zwischen einem Transparentmode und einem Reflektivmode schaltbar ist, wobei der Transparentmode bei Betrieb der Flüssigkristallanzeigeeinheit und der Reflektivmode bei ausgeschalteter Flüssigkristallanzeigeeinheit geschaltet ist.A training opportunity is that the diaphragm is a diaphragm liquid crystal cell, the switchable between a transparent mode and a reflective mode wherein the transparent mode in operation of the liquid crystal display unit and the reflective mode when the liquid crystal display unit is turned off is switched.
Vorzugsweise beinhaltet die Blendenflüssigkristallzelle eine smektische Flüssigkristallsubstanz, wobei die transparenten Zellenwände der Blendenflüssigkristallzelle mit von einer Spannung beaufschlagbaren transparenten Ansteuerelektroden versehen sind, so dass durch die Spannungsbeaufschlagung ein Umschalten zwischen dem Transparentmode und dem Reflektivmode erfolgt, in dem die Abschottung vor dem Sonnenlicht erfolgt.Preferably, the iris liquid crystal cell includes a smectic liquid crystal substance, wherein the transparent cell walls of the iris liquid crystal cell with by a voltage beauf are provided beatable transparent drive electrodes, so that by the voltage application, a switching between the transparent mode and the reflective mode takes place, in which the foreclosure is done in front of sunlight.
Im Transparentmode wird der Blick auf das Anzeigefeld des Flüssigkristallelements freigegeben.in the Transparent mode becomes the view of the display area of the liquid crystal element Approved.
Das Flüssigkristallelement kann beobachterseitig ein vorderes Polfilter und auf der beobachterabgewandten Seite ein hinteres Polfilter tragen.The liquid crystal element observer can see a front polarizer and on the observer away Side carry a rear polarizer.
Eine weitere Ausbildungsmöglichkeit besteht darin, dass die Blende ein Blendenpolfilter ist, dessen Polarisierung der Polarisierung des von dem Flüssigkristallelement beobachterseitig ausgesandten Lichts entspricht.A further training opportunity is that the aperture is an aperture pole filter whose polarization the polarization of the liquid crystal element observer side emitted light corresponds.
Durch das Blendenpolfilter wird der größte Teil des eindringenden Sonnenlichts abgeschottet, so dass die sonnenlichtbedingte Eigenerwärmung der Anzeige auf ein Minimum reduziert wird.By the aperture pole filter becomes the largest part of the penetrating sunlight foreclosed, so that the sunlight-related Self-heating the Display is reduced to a minimum.
Das von dem Flüssigkristallelement ausgesandte Licht wird deutlich weniger reduziert, da dieses bereits polarisiert ist und beim Durchgang durch das Blendenpolfilter eine deutlich geringere Reduzierung erfährt.The from the liquid crystal element emitted light is significantly less reduced, since this already is polarized and when passing through the Aperture Filter a significantly reduced.
Bauteilsparend kann das vordere Polfilter das Blendenpolfilter bilden.component saving For example, the front pole filter can form the aperture pole filter.
Dabei kann das Blendenpolfilter auf dem Deckglas angeordnet sein.there For example, the aperture pole filter can be arranged on the cover glass.
Das Flüssigkristallelement kann ein reflektives oder ein transmissives oder ein transflektives Flüssigkristallelement sein, wobei das transmissive und das transflektive Flüssigkristallelement mit einer Lichtquelle zur Durchleuchtung von der Rückseite her versehen ist.The liquid crystal element may be a reflective or a transmissive or a transflective liquid crystal element wherein the transmissive and transflective liquid crystal element with a light source for transillumination from the back is provided.
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im Folgenden näher beschrieben. Es zeigen:embodiments The invention are illustrated in the drawings and will be described in more detail below. Show it:
Die
dargestellten Flüssigkristallanzeigeinheiten
weisen ein im Detail nicht näher
dargestelltes Flüssigkristallelement
Auf den einander zugewandten Flächen der Substrate sind Ansteuerelektroden angeordnet.On the facing surfaces the substrates are arranged drive electrodes.
Die Außenfläche des beobachterseitigen Substrats trägt einen vorderen Polfilter und die Außenfläche des der Beobachterseite abgewandten Substrats einen hinteren Polfilter.The Outside surface of the observer-side substrate carries a front polarizer and the outer surface of the observer side remote substrate a rear polarizing filter.
Bei
dem Ausführungsbeispiel
der
Die
einander zugewandten Flächen
der transparenten Zellenwände
Durch
die Ansteuerung mit der Ansteuerspannung ist die Blendenflüssigkristallzelle
Trifft
Sonnenlicht
Wird
die Blendenflüssigkristallzelle
Bei
dem Ausführungsbeispiel
der
Beobachterseitig
vor dem Blendenpolfilter
Das
Flüssigkristallelement
Das
von außen
eindringende Sonnenlicht
Da
das von dem Flüssigkristallelement
Eine
typische prozentuale Reduzierung des Lichts je nach seiner Richtung
ist in
- 11
- Flüssigkristallelementliquid crystal element
- 22
- BlendenflüssigkristallzelleDazzle liquid crystal cell
- 33
- Zellenwandcell wall
- 44
- Zellenwandcell wall
- 55
- Kammerchamber
- 66
- Flüssigkristallsubstanzliquid crystal substance
- 77
- Ansteuerelektrodedrive electrode
- 88th
- Ansteuerelektrodedrive electrode
- 99
- Sonnenlichtsunlight
- 1010
- BlendenpolfilterBlendenpolfilter
- 1111
- Deckglascover glass
- 1212
- Polarisationsachsenpolarization axes
- 1212
- Lichtlight
Claims (16)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008014608.0A DE102008014608B4 (en) | 2008-03-17 | 2008-03-17 | Liquid crystal display unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008014608.0A DE102008014608B4 (en) | 2008-03-17 | 2008-03-17 | Liquid crystal display unit |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102008014608A1 true DE102008014608A1 (en) | 2009-09-24 |
DE102008014608B4 DE102008014608B4 (en) | 2021-02-04 |
Family
ID=40983889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008014608.0A Active DE102008014608B4 (en) | 2008-03-17 | 2008-03-17 | Liquid crystal display unit |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102008014608B4 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3233301A1 (en) * | 1982-09-08 | 1984-03-08 | Robert Bosch Gmbh, 7000 Stuttgart | Arrangement for eliminating reflection from displays |
DE4038498A1 (en) * | 1990-12-03 | 1992-06-04 | Trebe Elektronik Inh Joannis T | Plastics foil with controllable transparency - comprises liq. crystal layer between polyvinyl chloride foil layers, for blind slat, window coating and composite glass interlayer |
DE4208845C1 (en) * | 1992-03-19 | 1993-07-15 | Deutsche Aerospace Ag, 8000 Muenchen, De | |
DE19906483A1 (en) * | 1999-02-17 | 2000-09-07 | Mannesmann Vdo Ag | Liquid crystal display |
-
2008
- 2008-03-17 DE DE102008014608.0A patent/DE102008014608B4/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3233301A1 (en) * | 1982-09-08 | 1984-03-08 | Robert Bosch Gmbh, 7000 Stuttgart | Arrangement for eliminating reflection from displays |
DE4038498A1 (en) * | 1990-12-03 | 1992-06-04 | Trebe Elektronik Inh Joannis T | Plastics foil with controllable transparency - comprises liq. crystal layer between polyvinyl chloride foil layers, for blind slat, window coating and composite glass interlayer |
DE4208845C1 (en) * | 1992-03-19 | 1993-07-15 | Deutsche Aerospace Ag, 8000 Muenchen, De | |
DE19906483A1 (en) * | 1999-02-17 | 2000-09-07 | Mannesmann Vdo Ag | Liquid crystal display |
Also Published As
Publication number | Publication date |
---|---|
DE102008014608B4 (en) | 2021-02-04 |
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