DE10102394B4 - Double-layer STN liquid crystal display element - Google Patents
Double-layer STN liquid crystal display element Download PDFInfo
- Publication number
- DE10102394B4 DE10102394B4 DE2001102394 DE10102394A DE10102394B4 DE 10102394 B4 DE10102394 B4 DE 10102394B4 DE 2001102394 DE2001102394 DE 2001102394 DE 10102394 A DE10102394 A DE 10102394A DE 10102394 B4 DE10102394 B4 DE 10102394B4
- Authority
- DE
- Germany
- Prior art keywords
- liquid crystal
- transparent
- films
- crystal display
- display 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.)
- Expired - Fee Related
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
- G02F1/137—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
- G02F1/139—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 based on orientation effects in which the liquid crystal remains transparent
- G02F1/1396—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 based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
- G02F1/1397—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 based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell the twist being substantially higher than 90°, e.g. STN-, SBE-, OMI-LC cells
-
- 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
- G02F1/13471—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 all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
-
- 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
Abstract
Doppelschicht-STN-Flüssigkristallanzeigeelement,
umfassend:
ein Anzeigeflüssigkristallelement
(10), in dem transparente Anzeigeelektroden (13D) gebildet sind
und in dem ein STN-Flüssigkristall
(15) eingeschlossen ist, und
ein Kompensationsflüssigkristallelement
(20) mit zwei einander gegenüberliegenden
und voneinander im Abstand angeordneten Glassubstraten (25, 26),
das jeweilige als Heizer ausgebildete transparente Widerstandsfilme
(43, 44) aus ITO an den Innenflächen
der jeweiligen Glassubstrate (25, 26), ein Dichtelement (41) zwischen
den Glassubstraten (25, 26) zur Bildung eines abgedichteten Hohlraums
zwischen diesen und einen STN-Flüssigkristall
(42) in dem Hohlraum aufweist, wobei
das Kompensationsflüssigkristallelement
(20) und das Anzeigeflüssigkristallelement
(10) übereinandergelegt
sind und das Kompensationsflüssigkristallelement
(20) bezüglich
des Anzeigeflüssigkristallelements
eine optische Kompensationsbeziehung aufweist, wobei
zwei Kurzschließelemente
(28) zum elektrischen Kurzschließen der Lateralseitenränder eines
(43) der transparenten Widerstandsfilme (43, 44) mit den entsprechenden gegenüberliegenden
Lateralseitenrändern
des anderen (44) der transparenten Widerstandsfilme (43, 44) parallel zueinander
vorhanden sind, wobei
die entgegengesetzten Lateralseitenränder eines
(25) der Glassubstrate (25, 26) sich über die...Double layer STN liquid crystal display element comprising:
a display liquid crystal element (10) in which transparent display electrodes (13D) are formed and in which an STN liquid crystal (15) is enclosed, and
a compensation liquid crystal element (20) having two glass substrates (25, 26) located opposite each other, the respective resistive films (43, 44) of ITO formed as heaters on the inner surfaces of the respective glass substrates (25, 26); 41) between the glass substrates (25, 26) to form a sealed cavity therebetween and an STN liquid crystal (42) in the cavity, wherein
the compensation liquid crystal element (20) and the display liquid crystal element (10) are superimposed and the compensation liquid crystal element (20) has an optical compensation relationship with respect to the display liquid crystal element
two short-circuiting members (28) for electrically shorting the lateral side edges of one (43) of the transparent resistance films (43, 44) with the corresponding opposite lateral side edges of the other (44) of the transparent resistance films (43, 44) are provided in parallel with each other
the opposite lateral side edges of one (25) of the glass substrates (25, 26) extend over the ...
Description
Hintergrund der ErfindungBackground of the invention
Diese Erfindung betrifft ein Doppelschicht-STN-Flüssigkristallanzeigeelement, insbesondere ein Doppelschicht-STN-Flüssigkristallanzeigeelement mit transparenten Widerstandsfilmen für einen Heizer, der auf Substraten gebildet ist.These The invention relates to a double-layer STN liquid crystal display element, in particular a double-layer STN liquid crystal display element with transparent resistor films for a heater mounted on substrates is formed.
Zuerst
wird die Temperaturabhängigkeitscharakteristik
der Antwortzeit des Doppelschicht-STN-Flüssigkristallanzeigeelements
unter Bezug auf die
Es
ist hier festzuhalten, daß sich
die Viskosität
von Flüssigkeit
im allgemeinen mit verändernden Temperaturen ändert. Insbesondere
der Flüssigkristall,
der sowohl Eigenschaften eines Festkörpers als auch Eigenschaften
einer Flüssigkeit
aufweist, unterliegt einer starken Änderung seiner Viskosität aufgrund
der Temperaturänderung,
und die Antwortzeit von Flüssigkristall
hängt von
der Temperatur ab.
Aus
diesem Grund ist in der vorgenannten PCT-Offenlegungsschrift gezeigt,
daß eines
(Glassubstrat
Das Flüssigkristallanzeigeelement, das als eine in einem Fahrzeug installierte Anzeige verwendet wird, wird mit elektrischem Strom von einer Batterie versorgt. Die Batteriespannung VB des Fahrzeugs ist jedoch in der Regel nur 12 V. Andererseits ist es schwierig, den von den transparenten Widerstandsfilmen aus ITO gelieferten Widerstand R auf unter 20 bis 30 Ω zu senken. Demzufolge würde, wenn beispielsweise R = 20 Ω, die erzielte Heizleistung WH nur etwa WH = VB 2/R = 7 W betragen. Aus diesem Grund kann es in extrem kaltem Klima unmöglich sein, die Temperatur des Flüssigkristallanzeigeelements auf einen Wert anzuheben, der ausreicht, daß eine zufriedenstellende Antwortrate erzielt wird.The liquid crystal display element used as a display installed in a vehicle is supplied with electric power from a battery. However, the battery voltage V B of the vehicle is usually only 12V. On the other hand, it is difficult to lower the resistance R supplied from the ITO transparent resistance films to below 20 to 30Ω. Accordingly, if, for example, R = 20 Ω, the achieved heating power W H would be only about W H = V B 2 / R = 7 W. For this reason, in an extremely cold climate, it may be impossible to raise the temperature of the liquid crystal display element to a level sufficient to achieve a satisfactory response rate.
Obwohl
es nicht dem Zweck der Heizung von Flüssigkristall dient, lehrt die
japanische Offenlegungsschrift
Aus
der
Die
Aus
der
Es ist Aufgabe dieser Erfindung, ein Doppelschicht-STN-Flüssigkristallanzeigeelement mit einem transparenten Widerstandsfilmheizer zu schaffen, der bei relativ niedriger Spannung der Heizstromquelle eine große elektrische Leistung abgeben kann.It It is an object of this invention to provide a bilayer STN liquid crystal display element with a transparent resistance film heater to create at relatively low voltage of the heating current source a large electrical Can deliver power.
Diese Aufgabe wird durch ein Doppelschicht-STN-Flüssigkristallanzeigeelement gemäß Patentanspruch 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.These The object is achieved by a double-layer STN liquid crystal display element according to claim 1 solved. Advantageous developments of the invention are the subject of the dependent claims.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Ausführliche Beschreibung der bevorzugten AusführungsformenFull Description of the Preferred Embodiments
Eine
Ausführungsform
dieser Erfindung wird nun unter Bezug auf
Wie
beim in
Ein
Glassubstrat
Bei
dem Substrat
Um
ein gleichförmiges
Temperaturprofil aufgrund der von den transparenten Widerstandsfilmen
Die
transparenten Widerstandsfilme
Wie
oben beschrieben, befinden sich die zwei transparenten Widerstandsfilme
im wesentlichen auf gleichem Potential, da die transparenten Widerstandsfilme
Unter
Bezug auf
Effekte der ErfindungEffects of the invention
Wie
oben diskutiert, kann erfindungsgemäß die Wärmeerzeugung selbst bei niedriger
Spannung der Stromquelle verbessert werden, indem die auf der Innenfläche von
zwei ein Kompensationsflüssigkristallelement
einschließenden
Glassubstraten gebildeten transparenten Widerstandsfilme parallel
angeschlossen werden und zum Heizen elektrischer Strom durch die
Filme geleitet wird. Außerdem
kann die Kurzschließstruktur
vereinfacht werden, indem die Heizerelektroden
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000013220A JP2001201760A (en) | 2000-01-21 | 2000-01-21 | Double layer type super twisted nematic liquid crystal display device |
JP13220/00 | 2000-01-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10102394A1 DE10102394A1 (en) | 2001-08-23 |
DE10102394B4 true DE10102394B4 (en) | 2008-07-10 |
Family
ID=18540837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2001102394 Expired - Fee Related DE10102394B4 (en) | 2000-01-21 | 2001-01-19 | Double-layer STN liquid crystal display element |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP2001201760A (en) |
DE (1) | DE10102394B4 (en) |
GB (1) | GB2360851B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0026616D0 (en) * | 2000-10-31 | 2000-12-13 | Varintelligent Bvi Ltd | A heater |
DE10164063B4 (en) * | 2001-12-24 | 2007-12-06 | Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg | Composite disc with an electrically controllable functional element |
DE10228591A1 (en) | 2002-06-26 | 2004-01-15 | Siemens Ag | DSTN display with electromagnetic shielding |
JP2008085287A (en) * | 2006-08-28 | 2008-04-10 | Hitachi Chem Co Ltd | Method for connecting circuit member |
JP4623161B2 (en) | 2008-08-07 | 2011-02-02 | 株式会社デンソー | Liquid crystal display device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4093355A (en) * | 1977-02-04 | 1978-06-06 | General Motors Corporation | Symmetrical internal heater for liquid crystal display |
US5886763A (en) * | 1997-09-26 | 1999-03-23 | Ois Optical Imaging Systems, Inc. | LCD heater utilizing Z-axis conductive adhesive to attach bus bars to ito |
DE19848547A1 (en) * | 1997-11-07 | 1999-05-12 | Mannesmann Vdo Ag | Display device |
-
2000
- 2000-01-21 JP JP2000013220A patent/JP2001201760A/en active Pending
-
2001
- 2001-01-19 DE DE2001102394 patent/DE10102394B4/en not_active Expired - Fee Related
- 2001-01-22 GB GB0101543A patent/GB2360851B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4093355A (en) * | 1977-02-04 | 1978-06-06 | General Motors Corporation | Symmetrical internal heater for liquid crystal display |
US5886763A (en) * | 1997-09-26 | 1999-03-23 | Ois Optical Imaging Systems, Inc. | LCD heater utilizing Z-axis conductive adhesive to attach bus bars to ito |
DE19848547A1 (en) * | 1997-11-07 | 1999-05-12 | Mannesmann Vdo Ag | Display device |
Also Published As
Publication number | Publication date |
---|---|
GB0101543D0 (en) | 2001-03-07 |
GB2360851B (en) | 2003-07-09 |
JP2001201760A (en) | 2001-07-27 |
DE10102394A1 (en) | 2001-08-23 |
GB2360851A (en) | 2001-10-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8364 | No opposition during term of opposition | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |