EP0374085B1 - Electro-optical planar display, in particular an lcd display panel - Google Patents
Electro-optical planar display, in particular an lcd display panel Download PDFInfo
- Publication number
- EP0374085B1 EP0374085B1 EP89730208A EP89730208A EP0374085B1 EP 0374085 B1 EP0374085 B1 EP 0374085B1 EP 89730208 A EP89730208 A EP 89730208A EP 89730208 A EP89730208 A EP 89730208A EP 0374085 B1 EP0374085 B1 EP 0374085B1
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- EP
- European Patent Office
- Prior art keywords
- light
- housing
- electro
- display elements
- assigned
- 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 - Lifetime
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Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/04—Signs, boards or panels, illuminated from behind the insignia
- G09F13/0418—Constructional details
- G09F2013/05—Constructional details indicating exit way or orientation
Definitions
- the invention relates to an electro-optical flat display device, in particular an LCD display panel according to the preamble of claim 1.
- An electro-optical flat display device of the generic type designed as an LCD display panel is previously known from EP 0.146.285.
- several display elements are arranged next to each other in five horizontal rows, each of which is formed from a 5x3 matrix.
- the five rows of LCD display elements form the front of the housing.
- Two fluorescent lamps, which extend in the longitudinal direction of the rows of LCD display elements, are installed in the housing as the lighting device.
- the disadvantage here is a high heat development of the fluorescent lamps within the flat housing, so that fans must be attached to the housing regularly for heat dissipation.
- Another disadvantage is that the fluorescent lamps have to be replaced after a certain burning time.
- the individual rows of LCD display elements are arranged foldably on the front of the housing, so that the fluorescent lamps provided with a reflector on the rear of the housing can be replaced from the front of the housing.
- Another disadvantage is that the LCD display elements are constantly exposed to UV and heat radiation. This leads to the decomposition and destruction of the dyes within the LCD display elements, so that they have to be replaced after a long period of use.
- a further disadvantage is that the fluorescent lamps must be associated with electrical installation devices inside the housing or on the rear thereof, which also generate heat and are heavy in weight.
- the necessity of the foldable arrangement of the LCD display elements through a large number of housing openings allows dust to penetrate into the housing interior, which is deposited on the fluorescent lamps on the one hand and on the inside of the LCD display elements on the other hand and for premature light attenuation leads.
- the invention is therefore based on the object of improving an electro-optical flat display device, in particular an LCD display panel, of the generic type in such a way that the lighting device is considerably simplified in order to achieve a more compact flat display device, the display elements of which are not UV or Heat radiation can still be exposed to dust, and which is particularly easy to maintain.
- the backlighting of the display elements takes place by means of a light guide tube assigned to the row of display elements and arranged in the interior of the housing, the light source at one end of the light guide tube, in particular outside the housing.
- the light pipe is made of translucent material and is surrounded by a reflector, so that the entire light radiation emanating from the light source is constantly reflected within the light guide tube and can only emerge directly in the area of the individual display elements through the cutouts of the reflector. On the one hand, this enables full utilization of the light radiation from the light source.
- the housing can thus be encapsulated in a dust-tight manner. Furthermore, there is no electrical installation inside the housing. A ventilation device of the housing is also no longer required.
- the light source is arranged at the end of the light guide tube located outside the housing, and color and heat filters are placed in front of the light source.
- the electronic components for controlling the LCD display elements can be arranged in the housing spaces formed between them.
- Optical tubes are known per se, for example from DE 34 30 191. However, these serve exclusively as lighting elements for room lighting, whereas the use of such light guide tubes in electro-optical flat display devices, in particular LCD display panels, is claimed according to the invention.
- the LCD display panel consists of a flat housing 1 with rear wall 2, top wall 3, bottom wall 4, side walls 5 and with intermediate walls 6, which extend between the side walls 5 parallel to top wall 3 and bottom wall 4 and form the individual chambers 7.
- the front 8 of the housing is essentially formed by rows 9 of LCD display elements 10, which in the exemplary embodiment are designed as known 7-segment display elements. Instead of the 7-segment display elements, 3x5 matrix elements or the like can also be used. The structure of such LCD display elements is described in more detail in EP 0.146.285.
- the LCD display elements 10 are received by profiles 11 which extend longitudinally on the front side 8 and which are fastened to the top wall 3 and the bottom wall 4 and to the intermediate walls 6.
- the electronic components 23 assigned to the individual LCD display elements 10 are mounted on the intermediate walls 6. On the inside, the LCD display elements 10 are assigned to diffusers 24.
- the entire housing 1 is encapsulated in a dust-tight manner.
- light guide tubes 12 are arranged, which are U-shaped in the exemplary embodiment, the open side of the U-shape being formed by a strip-shaped wall 13.
- the light guide tubes 12 and the U-shaped closing walls 13 are surrounded by reflection material 14, which has cutouts 15 only in the area of the LCD display elements 10, which serve as light exit openings and whose surface dimensions correspond exactly to those of the LCD display elements 10 to be illuminated and are assigned to them is.
- concentrators 16 are still mounted in the rear curvature area of the U-shape, which direct the light that is totally totally reflected in the light guide tubes 10 onto the opposite cutouts 15 of the reflector material 14.
- Each light guide tube 12 is connected to a light guide tube 17 lying outside the housing 1, which has at one end a light source 18 which introduces all of its light radiation into the light guide tube 17 by means of a suitable reflector 25.
- Deflecting mirrors 19, 20 are arranged at the bends of the light guide tube 17 and at the entry points of the light guide tubes 12, the deflecting mirrors 19 deflecting all of the light radiation supplied and the deflecting mirrors 20 deflecting only partial radiation into the respective light guide tubes 17 and 12, respectively.
- the light source 18 is preceded by a heat filter 21 in the form of a glass pane and a color filter 22 which is in the form of an electrically controllable, birefringent color filter in liquid crystal technology (ECB-LC filter).
- the light radiation emanating from the light source 18 is totally introduced into the individual light guide tubes 12 via the light guide tube 17 and the deflecting mirror 19, 20.
- the light radiation introduced onto the walls of the light guide tubes 12, including the flat walls 13 assigned to them is totally introduced into the individual light guide tubes 12 via the light guide tube 17 and the deflecting mirror 19, 20.
- Additional mirrors for largely lossless reflection of the light radiation are arranged at the end opposite the light source 18 in a manner not shown in detail.
- the light radiation which is thus totally totally reflected within the light guide tubes 12 can only emerge through the light exit openings 15 which are assigned to the respective LCD display elements 10.
- the intensity of the light radiation emerging here is increased further by means of the concentrators 16.
- a material known per se serves as the material for the light guide tube 12 and the wall 13 that closes it off.
- a reflection film is used, which is explained in DE 34 30 191 A1 using the example of a luminous element with prismatic light guide for room lighting.
- a special design of the outer contour of the light-guiding film serves for total reflection of the light radiation within a light-guiding tube 12, wherein the radiation can only exit within the cutouts 15.
Abstract
Description
Die Erfindung bezieht sich auf eine elektro-optische Flachanzeigeeinrichtung, insbesondere LCD-Anzeigetafel gemäß dem Oberbegriff des Anspruches 1.The invention relates to an electro-optical flat display device, in particular an LCD display panel according to the preamble of claim 1.
Eine als LCD-Anzeigetafel ausgebildete elektro-optische Flachanzeigeeinrichtung der gattungsgemäßen Art ist aus der EP 0.146.285 vorbekannt. Bei dieser sind in fünf horizontalen Reihen jeweils mehrere Anzeigeelemente nebeneinander angeordnet, die jeweils aus einer 5x3-Matrix gebildet sind. Die fünf Reihen von LCD-Anzeigeelementen bilden die Vorderseite des Gehäuses. Im Gehäuse sind zwei, sich in Längsrichtung der Reihen von LCD-Anzeigeelementen erstreckende Leuchtstofflampen als Beleuchtungseinrichtung installiert.An electro-optical flat display device of the generic type designed as an LCD display panel is previously known from EP 0.146.285. In this case, several display elements are arranged next to each other in five horizontal rows, each of which is formed from a 5x3 matrix. The five rows of LCD display elements form the front of the housing. Two fluorescent lamps, which extend in the longitudinal direction of the rows of LCD display elements, are installed in the housing as the lighting device.
Nachteilig hierbei ist eine große Wärmeentwicklung der Leuchtstofflampen innerhalb des flachen Gehäuses, so daß zur Wärmeableitung regelmäßig Ventilatoren am Gehäuse angebracht werden müssen. Nachteilig ist ferner, daß die Leuchtstofflampen nach einer bestimmten Brenndauer ausgewechselt werden müssen. Hierzu sind die einzelnen Reihen von LCD-Anzeigeelementen klappbar auf der Vorderseite des Gehäuses angeordnet, so daß die auf der Gehäuserückseite mit einem Reflektor versehenen Leuchtstofflampen von der Vorderseite des Gehäuses her ausgewechselt werden können.The disadvantage here is a high heat development of the fluorescent lamps within the flat housing, so that fans must be attached to the housing regularly for heat dissipation. Another disadvantage is that the fluorescent lamps have to be replaced after a certain burning time. For this purpose, the individual rows of LCD display elements are arranged foldably on the front of the housing, so that the fluorescent lamps provided with a reflector on the rear of the housing can be replaced from the front of the housing.
Nachteilig ist ferner, daß die LCD-Anzeigeelemente ständig durch UV- und Wärme-Strahlung belastet werden. Dies führt zur Zersetzung und Zerstörung der Farbstoffe innerhalb der LCD-Anzeigeelemente, so daß diese nach längerer Benutzungszeit ausgewechselt werden müssen. Ferner besteht ein Nachteil darin, daß den Leuchtstofflampen elektrische Installationseinrichtungen innerhalb des Gehäuses oder auf dessen Rückseite zugeordnet sein müssen, welche ebenfalls Wärme erzeugen und schwer von Gewicht sind. Schließlich liegt ein weiterer Nachteil darin, daß durch die Notwendigkeit der klappbaren Anordnung der LCD-Anzeigeelemente durch eine Vielzahl von Gehäuseöffnungen Staub in den Gehäuseinnenraum eindringen kann, welcher sich auf den Leuchtstofflampen einerseits und auf den Innenseiten des LCD-Anzeigeelemente andererseits ablagert und zur vorzeitigen Lichtabschwächung führt.Another disadvantage is that the LCD display elements are constantly exposed to UV and heat radiation. This leads to the decomposition and destruction of the dyes within the LCD display elements, so that they have to be replaced after a long period of use. A further disadvantage is that the fluorescent lamps must be associated with electrical installation devices inside the housing or on the rear thereof, which also generate heat and are heavy in weight. Finally, there is a further disadvantage that the necessity of the foldable arrangement of the LCD display elements through a large number of housing openings allows dust to penetrate into the housing interior, which is deposited on the fluorescent lamps on the one hand and on the inside of the LCD display elements on the other hand and for premature light attenuation leads.
Der Erfindung liegt von daher die Aufgabe zugrunde, eine elektro-optische Flachanzeigeeinrichtung, insbesondere eine LCD-Anzeigetafel, der gattungsgemäßen Art dahingehend zu verbessern, daß die Beleuchtungseinrichtung erheblich vereinfacht wird, um so eine kompaktere Flachanzeigeeinrichtung zu erzielen, deren Anzeigeelemente weder durch UV- und Wärme-Strahlung noch durch Staubanfall beansprucht werden, und die besonders wartungsfreundlich ist.The invention is therefore based on the object of improving an electro-optical flat display device, in particular an LCD display panel, of the generic type in such a way that the lighting device is considerably simplified in order to achieve a more compact flat display device, the display elements of which are not UV or Heat radiation can still be exposed to dust, and which is particularly easy to maintain.
Die Lösung dieser Aufgabe ergibt sich aus den kennzeichnenden Merkmalen des Anspruches 1. Erfindungsgemäß erfolgt die rückwärtige Beleuchtung der Anzeigeelemente, insbesondere LCD-Anzeigeelemente, mittels einer der Reihe von Anzeigeelementen zugeordneten, im Inneren des Gehäuses angeordneten Lichtleitröhre, deren Lichtquelle an einem Ende der Lichtleitröhre, insbesondere außerhalb des Gehäuses, angeordnet ist. Die Lichtleitröhre besteht aus lichtdurchlässigem Material und ist von einem Reflektor umgeben, so daß die gesamte, von der Lichtquelle ausgehende Lichtstrahlung innerhalb der Lichtleitröhre ständig reflektiert wird und nur durch die Ausschnitte des Reflektors unmittelbar im Bereich der einzelnen Anzeigeelemente austreten kann. Hierdurch wird einerseits eine vollständige Ausnutzung der Lichtstrahlung der Lichtquelle ermöglicht. Andererseits erfolgt keine UV- und Wärme-Strahlungsbelastung der Anzeigeelemente, insbesondere LCD-Anzeigeelemente, ferner ist ein Auswechseln von innerhalb des Gehäuses im Bereich der Anzeigeelemente angeordneten Bauteilen der Beleuchtungseinrichtung nicht mehr erforderlich, so daß die einzelnen Anzeigeelemente fest an der Vorderseite des Gehäuses montiert werden können. Das Gehäuse kann somit staubdicht gekapselt werden. Ferner entfällt jegliche Elektroinstallation innerhalb des Gehäuses. Auch ist eine Lüftungseinrichtung des Gehäuses nicht mehr erforderlich.This object is achieved from the characterizing features of claim 1. According to the invention, the backlighting of the display elements, in particular LCD display elements, takes place by means of a light guide tube assigned to the row of display elements and arranged in the interior of the housing, the light source at one end of the light guide tube, in particular outside the housing. The light pipe is made of translucent material and is surrounded by a reflector, so that the entire light radiation emanating from the light source is constantly reflected within the light guide tube and can only emerge directly in the area of the individual display elements through the cutouts of the reflector. On the one hand, this enables full utilization of the light radiation from the light source. On the other hand, there is no UV and heat radiation exposure of the display elements, in particular LCD display elements, and it is no longer necessary to replace components of the lighting device arranged inside the housing in the region of the display elements, so that the individual display elements are firmly mounted on the front of the housing can. The housing can thus be encapsulated in a dust-tight manner. Furthermore, there is no electrical installation inside the housing. A ventilation device of the housing is also no longer required.
In weiterer Ausbildung der Erfindung ist die Lichtquelle am außerhalb des Gehäuses gelegenen Ende der Lichtleitröhre angeordnet, und es sind der Lichtquelle Farb- und Wärmefilter vorgesetzt. Diese Anordnung erhöht einerseits die Wartungsfreundlichkeit der Flachanzeigeeinrichtung und vermindert andererseits die Wärmebelastung der Anzeigeelemente im Gehäuse.In a further embodiment of the invention, the light source is arranged at the end of the light guide tube located outside the housing, and color and heat filters are placed in front of the light source. This arrangement on the one hand increases the ease of maintenance of the flat display device and on the other hand reduces the thermal load on the display elements in the housing.
Schließlich können bei Anordnung mehrerer Reihen von Anzeigeelementen übereinander, denen jeweils eine Lichtleitröhre zugeordnet ist, in den dazwischen gebildeten Gehäuse-Freiräumen die elektronischen Bauelemente für die Steuerung der LCD-Anzeigeelemente angeordnet werden.Finally, if several rows of display elements are arranged one above the other, each of which is assigned a light guide tube, the electronic components for controlling the LCD display elements can be arranged in the housing spaces formed between them.
Lichtleitröhren sind an sich z.B. aus der DE 34 30 191 bekannt. Diese dienen jedoch ausschließlich als Leuchtkörper für die Raumbeleuchtung, wohingegen erfindungsgemäß die Verwendung derartiger Lichtleitröhren bei elektro-optischen Flachanzeigeeinrichtungen, insbesondere LCD-Anzeigetafeln, beansprucht wird.Optical tubes are known per se, for example from DE 34 30 191. However, these serve exclusively as lighting elements for room lighting, whereas the use of such light guide tubes in electro-optical flat display devices, in particular LCD display panels, is claimed according to the invention.
Die Erfindung ist nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles einer als LCD-Anzeigetafel ausgebildeten elektro-optischen Flachanzeigeeinrichtung näher erläutert. Es zeigen:
- Fig. 1
- eine perspektivische Darstellung der LCD-Anzeigetafel und
- Fig. 2
- eine perspektivische Schnittdarstellung der LCD-Anzeigetafel.
- Fig. 1
- a perspective view of the LCD panel and
- Fig. 2
- a perspective sectional view of the LCD panel.
Die LCD-Anzeigetafel besteht aus einem flachen Gehäuse 1 mit Rückwand 2, Deckwand 3, Bodenwand 4, Seitenwänden 5 und mit Zwischenwänden 6, die sich zwischen den Seitenwänden 5 parallel zu Deckwand 3 und Bodenwand 4 erstrecken und die einzelne Kammern 7 bilden. Die Vorderseite 8 des Gehäuses wird im wesentlichen durch Reihen 9 von LCD-Anzeigeelementen 10 gebildet, die im Ausführungsbeispiel als bekannte 7-Segmente-Anzeigeelemente ausgebildet sind. Anstelle der 7-Segmente-Anzeigeelemente können auch 3x5-Matrixelemente oder dergleichen verwendet werden. Der Aufbau derartiger LCD-Anzeigeelemente ist in der EP 0.146.285 näher beschrieben. Die LCD-Anzeigeelemente 10 sind von sich auf der Vorderseite 8 längs erstreckenden Profilen 11 aufgenommen, die an der Deckwand 3 und der Bodenwand 4 sowie an den Zwischenwänden 6 befestigt sind. Die den einzelnen LCD-Anzeigeelementen 10 zugeordneten Elektronikbauteile 23 sind an den Zwischenwänden 6 montiert. Auf der Innenseite sind den LCD-Anzeigeelementen 10 Streuscheiben 24 zugeordnet. Das gesamte Gehäuse 1 ist staubdicht verkapselt.The LCD display panel consists of a flat housing 1 with
Innerhalb der einzelnen Kammern 7 des Gehäuses 1 sind Lichtleitröhren 12 angeordnet, die im Ausführungsbeispiel U-förmig ausgebildet sind, wobei die offene Seite der U-Form durch eine streifenförmige Wand 13 gebildet ist.Inside the individual chambers 7 of the housing 1,
Die Lichtleitröhren 12 und die U-förmig abschließenden Wände 13 sind von Reflektionsmaterial 14 umgeben, das nur im Bereich der LCD-Anzeigeelemente 10 Ausschnitte 15 aufweist, die als Lichtaustrittsöffnungen dienen und deren Flächenabmessung genau denjenigen der zu beleuchtenden LCD-Anzeigeelemente 10 entspricht und diesen zugeordnet ist. Innerhalb der Lichtleitröhren 12 sind noch im rückwärtigen Krümmungsbereich der U-Form Konzentratoren 16 gelagert, welche das in den Lichtleitröhren 10 ständig total reflektierte Licht auf die gegenüberliegenden Ausschnitte 15 des Reflektormaterials 14 richten.The
Jede Lichtleitröhre 12 ist an eine außerhalb des Gehäuses 1 liegende Lichtleitröhre 17 angeschlossen, welche an ihrem einen Ende eine Lichtquelle 18 aufweist, welche ihre gesamte Lichtstrahlung mittels eines geeigneten Reflektors 25 in die Lichtleitröhre 17 einleitet. An den Abwinklungen der Lichtleitröhre 17 und an den Einrittsstellen der Lichtleitröhren 12 sind Umlenkspiegel 19,20 angeordnet, wobei die Umlenkspiegel 19 die gesamte, zugeleitete Lichtstrahlung und die Umlenkspiegel 20 nur jeweils eine Teilstrahlung in die jeweilige Lichtleitröhre 17 bzw. 12 umlenken. Schließlich sind der Lichtquelle 18 ein als Glasscheibe ausgebildetes Wärmefilter 21 und ein Farbfilter 22 vorgeschaltet, das als elektrisch steuerbares, doppelbrechendes Farbfilter in Flüssigkristalltechnologie (ECB-LC-Filter) ausgebildet ist.Each
Die von der Lichtquelle 18 ausgehende Lichtstrahlung wird nach Durchtritt durch das Farbfilter 22 und das Wärmefilter 21 über die Lichtleitröhre 17 und die Umlenkspiegel 19,20 total in die einzelnen Lichtleitröhren 12 eingeleitet. Hier erfolgt eine ständige Totalreflektion der eingeleiteten Lichtstrahlung an den Wänden der Lichtleitröhren 12, einschließlich den diesen zugeordneten flachen Wänden 13.After passing through the
Am der Lichtquelle 18 entgegengesetzten Ende sind in nicht naher dargestellter Weise noch zusätzliche Spiegel zur weitgehend verlustfreien Reflektion der Lichtstrahlung angeordnet. Die innerhalb der Lichtleitröhren 12 somit ständig total reflektierte Lichtstrahlung kann nur durch die Lichtaustrittsöffnungen 15 austreten, welche den jeweiligen LCD-Anzeigeelementen 10 zugeordnet sind. Mittels der Konzentratoren 16 wird die Intensität der hier austretenden Lichtstrahlung noch erhöht.Additional mirrors for largely lossless reflection of the light radiation are arranged at the end opposite the
Als Material für die Lichtleitröhre 12 und die diese abschließende Wand 13 dient eine an sich bekannte Reflektionsfolie. In besonders bevorzugter Weise wird eine Reflektionsfolie verwendet, welche in der DE 34 30 191 A1 am Beispiel eines Leuchtkörpers mit prismatischer Lichtführung zur Raumbeleuchtung näher erläutert ist. Hierbei dient eine spezielle Gestaltung der Außenkontur der Lichtleitfolie der Totalreflektion der Lichtstrahlung innerhalb einer Lichtleitröhre 12, wobei ein Austritt der Strahlung nur innerhalb der Ausschnitte 15 möglich ist.A material known per se serves as the material for the
- 11
- Gehäusecasing
- 22nd
- RückwandBack wall
- 33rd
- DeckwandTop wall
- 44th
- BodenwandBottom wall
- 55
- SeitenwandSide wall
- 66
- ZwischenwandPartition
- 77
- Kammerchamber
- 88th
- Vorderseitefront
- 99
- Reiheline
- 1010th
- LCD-AnzeigeelementLCD display element
- 1111
- Profilprofile
- 1212
- LichtleitröhreLight pipe
- 1313
- Wandwall
- 1414
- ReflektormaterialReflector material
- 1515
- AusschnittNeckline
- 1616
- KonzentratorConcentrator
- 1717th
- LichtleitröhreLight pipe
- 1818th
- LichtquelleLight source
- 19,2019.20
- UmlenkspiegelDeflecting mirror
- 2121
- WärmefilterHeat filter
- 2222
- FarbfilterColor filter
- 2323
- Elektronik-BauelementeElectronics components
- 2424th
- StreuscheibeLens
- 2525th
- Reflektorreflector
Claims (7)
- An electro-optical flat display device, in particular a LCD panel, comprising a flat-design housing (1) having at least one line (9) of display elements (10) forming the front (8) of said housing (1) and comprising a lighting device being disposed inside said housing and assigned to said line (9) of display elements (10),
characterized by that the lighting device includes a light-conducting tube (12) disposed inside the housing (1) and a light-conducting tube (17) disposed outside said housing (1) and a light source (18) disposed at a light entrance opening of said light-conducting tube (17), that the light-conducting tube (12) is made from a transparent material and is surrounded by a reflector material (14), and that said reflector material (14) comprises cutouts (15) assigned to the individual display elements (10) and serving as light exit openings. - An electro-optical flat display device according to claim 1,
characterized by that the light source (18) is disposed at the end of the light-conducting tube (12, 17) disposed outside the housing (1). - An electro-optical flat display device according to claim 1 or 2,
characterized by that a heat filter (21) and a colour filter (22) are assigned to the light source (18). - An electro-optical flat display device according to claim 3,
characterized by that the heat filter (21) is made from a glass pane. - An electro-optical flat display device according to claim 3,
characterized by that the colour filter (22) is formed of an electrically controllable, double-refracting colour filter in liquid crystal technology (ECB-LC filter). - An electro-optical flat display device according to one of claims 1 to 5,
characterized by that the display elements (10) are formed as liquid crystal display elements. - An electro-optical flat display device according to claim 6,
characterized by that several lines of LCD elements (10) having each assigned thereto a light-conducting tube (12) are disposed inside the housing, and that the electronic components (B) assigned to said LCD elements (10) are disposed between the light-conducting tubes (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89730208T ATE94674T1 (en) | 1988-12-16 | 1989-10-14 | ELECTRO-OPTICAL FLAT DISPLAY DEVICE, IN PARTICULAR LCD DISPLAY PANEL. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3842900A DE3842900C1 (en) | 1988-12-16 | 1988-12-16 | |
| DE3842900 | 1988-12-16 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0374085A2 EP0374085A2 (en) | 1990-06-20 |
| EP0374085A3 EP0374085A3 (en) | 1990-12-05 |
| EP0374085B1 true EP0374085B1 (en) | 1993-09-15 |
Family
ID=6369639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89730208A Expired - Lifetime EP0374085B1 (en) | 1988-12-16 | 1989-10-14 | Electro-optical planar display, in particular an lcd display panel |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US5044734A (en) |
| EP (1) | EP0374085B1 (en) |
| JP (1) | JPH02238486A (en) |
| AT (1) | ATE94674T1 (en) |
| AU (1) | AU628427B2 (en) |
| BR (1) | BR8906533A (en) |
| CA (1) | CA2005792A1 (en) |
| DE (2) | DE3842900C1 (en) |
| DK (1) | DK638589A (en) |
| FI (1) | FI896040A0 (en) |
| NO (1) | NO894627L (en) |
| NZ (1) | NZ231200A (en) |
| PT (1) | PT92593B (en) |
| TR (1) | TR24389A (en) |
| ZA (1) | ZA899605B (en) |
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| GB2246231A (en) * | 1990-07-20 | 1992-01-22 | Marconi Gec Ltd | Liquid crystal displays. |
| DE4032679A1 (en) * | 1990-10-15 | 1992-04-16 | Mannesmann Kienzle Gmbh | DISPENSER DISPLAY DEVICE |
| US5341233A (en) * | 1991-05-15 | 1994-08-23 | Idemitsu Kosan Co., Ltd. | Liquid crystal module with tab assemblies connected through a flexible circuit board |
| US5528720A (en) * | 1992-03-23 | 1996-06-18 | Minnesota Mining And Manufacturing Co. | Tapered multilayer luminaire devices |
| US6002829A (en) | 1992-03-23 | 1999-12-14 | Minnesota Mining And Manufacturing Company | Luminaire device |
| US5237641A (en) * | 1992-03-23 | 1993-08-17 | Nioptics Corporation | Tapered multilayer luminaire devices |
| US5303322A (en) * | 1992-03-23 | 1994-04-12 | Nioptics Corporation | Tapered multilayer luminaire devices |
| DE9210692U1 (en) * | 1992-08-11 | 1993-12-16 | Opti Table Info Systeme Gmbh & | Liquid crystal display device |
| FR2710439B1 (en) * | 1993-09-21 | 1995-11-24 | Sextant Avionique | Lighting module for liquid crystal matrix instruments. |
| US5771321A (en) * | 1996-01-04 | 1998-06-23 | Massachusetts Institute Of Technology | Micromechanical optical switch and flat panel display |
| US6152580A (en) * | 1998-02-17 | 2000-11-28 | Rainbow Displays, Inc. | Apparatus and method for producing collimated light from an area source |
| BR0111784A (en) * | 2000-06-19 | 2003-05-27 | Siemens Transportation Systems | Traffic Information Display System and Configuration Method |
| TW546491B (en) * | 2001-02-21 | 2003-08-11 | Au Optronics Corp | Light source set with a uniform temperature function and flat display |
| US7417782B2 (en) * | 2005-02-23 | 2008-08-26 | Pixtronix, Incorporated | Methods and apparatus for spatial light modulation |
| US20070205969A1 (en) | 2005-02-23 | 2007-09-06 | Pixtronix, Incorporated | Direct-view MEMS display devices and methods for generating images thereon |
| US9082353B2 (en) | 2010-01-05 | 2015-07-14 | Pixtronix, Inc. | Circuits for controlling display apparatus |
| US8159428B2 (en) | 2005-02-23 | 2012-04-17 | Pixtronix, Inc. | Display methods and apparatus |
| US9229222B2 (en) | 2005-02-23 | 2016-01-05 | Pixtronix, Inc. | Alignment methods in fluid-filled MEMS displays |
| US9261694B2 (en) | 2005-02-23 | 2016-02-16 | Pixtronix, Inc. | Display apparatus and methods for manufacture thereof |
| US8519945B2 (en) | 2006-01-06 | 2013-08-27 | Pixtronix, Inc. | Circuits for controlling display apparatus |
| US7304786B2 (en) | 2005-02-23 | 2007-12-04 | Pixtronix, Inc. | Methods and apparatus for bi-stable actuation of displays |
| US8482496B2 (en) | 2006-01-06 | 2013-07-09 | Pixtronix, Inc. | Circuits for controlling MEMS display apparatus on a transparent substrate |
| US20080158635A1 (en) * | 2005-02-23 | 2008-07-03 | Pixtronix, Inc. | Display apparatus and methods for manufacture thereof |
| US9158106B2 (en) | 2005-02-23 | 2015-10-13 | Pixtronix, Inc. | Display methods and apparatus |
| US8310442B2 (en) | 2005-02-23 | 2012-11-13 | Pixtronix, Inc. | Circuits for controlling display apparatus |
| US7999994B2 (en) * | 2005-02-23 | 2011-08-16 | Pixtronix, Inc. | Display apparatus and methods for manufacture thereof |
| JP4483833B2 (en) * | 2005-09-22 | 2010-06-16 | エプソンイメージングデバイス株式会社 | Electro-optical device, electronic apparatus, protective member, and manufacturing method of protective member |
| US8526096B2 (en) | 2006-02-23 | 2013-09-03 | Pixtronix, Inc. | Mechanical light modulators with stressed beams |
| US9176318B2 (en) | 2007-05-18 | 2015-11-03 | Pixtronix, Inc. | Methods for manufacturing fluid-filled MEMS displays |
| US8248560B2 (en) | 2008-04-18 | 2012-08-21 | Pixtronix, Inc. | Light guides and backlight systems incorporating prismatic structures and light redirectors |
| US8520285B2 (en) | 2008-08-04 | 2013-08-27 | Pixtronix, Inc. | Methods for manufacturing cold seal fluid-filled display apparatus |
| US8169679B2 (en) | 2008-10-27 | 2012-05-01 | Pixtronix, Inc. | MEMS anchors |
| WO2011097258A1 (en) | 2010-02-02 | 2011-08-11 | Pixtronix, Inc. | Circuits for controlling display apparatus |
| TWI563328B (en) | 2010-12-20 | 2016-12-21 | Snaptrack Inc | Display, method for manufacturing the same, and system for modulating light |
| TWI545296B (en) * | 2012-12-24 | 2016-08-11 | 鴻海精密工業股份有限公司 | Backlight module |
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| US9134552B2 (en) | 2013-03-13 | 2015-09-15 | Pixtronix, Inc. | Display apparatus with narrow gap electrostatic actuators |
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| US4043636A (en) * | 1974-12-23 | 1977-08-23 | Intel Corporation | Illumination-panel for liquid crystal display of similar device |
| CH608934B5 (en) * | 1976-06-03 | 1979-10-31 | Bbc Brown Boveri & Cie | ELECTRO-OPTICAL DISPLAY DEVICE |
| DE2902745A1 (en) * | 1979-01-25 | 1980-08-07 | Vdo Schindling | VEHICLE INSTRUMENTS ILLUMINATED BY LIGHT GUIDE |
| DE2931327A1 (en) * | 1979-08-02 | 1981-02-19 | Rau Swf Autozubehoer | DISPLAY SYSTEM, ESPECIALLY FOR MOTOR VEHICLES |
| AU1377883A (en) * | 1982-02-22 | 1983-09-08 | Torresdal, D.N. | Digital meter with improved control and light directing structure for liquid crystal display |
| US4615579A (en) * | 1983-08-29 | 1986-10-07 | Canadian Patents & Development Ltd. | Prism light guide luminaire |
| GB2161969B (en) * | 1984-07-17 | 1988-03-09 | Stc Plc | Edge lit liquid crystal display device |
| US4775222A (en) * | 1984-08-27 | 1988-10-04 | Mitsubishi Rayon Company Ltd. | Light diffusing device |
| DE3618516A1 (en) * | 1985-12-13 | 1987-06-19 | Vdo Schindling | LIGHTING DEVICE |
| US4822145A (en) * | 1986-05-14 | 1989-04-18 | Massachusetts Institute Of Technology | Method and apparatus utilizing waveguide and polarized light for display of dynamic images |
| GB2198867A (en) * | 1986-12-17 | 1988-06-22 | Philips Electronic Associated | A liquid crystal display illumination system |
| US4838661A (en) * | 1988-01-05 | 1989-06-13 | Motorola, Inc. | Liquid crystal light emitting display system |
-
1988
- 1988-12-16 DE DE3842900A patent/DE3842900C1/de not_active Expired - Lifetime
-
1989
- 1989-10-14 AT AT89730208T patent/ATE94674T1/en active
- 1989-10-14 DE DE89730208T patent/DE58905624D1/en not_active Expired - Fee Related
- 1989-10-14 EP EP89730208A patent/EP0374085B1/en not_active Expired - Lifetime
- 1989-10-30 NZ NZ231200A patent/NZ231200A/en unknown
- 1989-11-21 NO NO89894627A patent/NO894627L/en unknown
- 1989-11-24 AU AU45539/89A patent/AU628427B2/en not_active Ceased
- 1989-12-07 US US07/447,550 patent/US5044734A/en not_active Expired - Fee Related
- 1989-12-11 TR TR89/1021A patent/TR24389A/en unknown
- 1989-12-15 DK DK638589A patent/DK638589A/en not_active Application Discontinuation
- 1989-12-15 ZA ZA899605A patent/ZA899605B/en unknown
- 1989-12-15 PT PT92593A patent/PT92593B/en not_active IP Right Cessation
- 1989-12-15 FI FI896040A patent/FI896040A0/en not_active Application Discontinuation
- 1989-12-15 JP JP1324095A patent/JPH02238486A/en active Pending
- 1989-12-18 BR BR898906533A patent/BR8906533A/en unknown
- 1989-12-18 CA CA002005792A patent/CA2005792A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP0374085A3 (en) | 1990-12-05 |
| AU4553989A (en) | 1990-06-21 |
| NO894627L (en) | 1990-06-18 |
| ZA899605B (en) | 1990-09-26 |
| DE3842900C1 (en) | 1990-05-10 |
| AU628427B2 (en) | 1992-09-17 |
| EP0374085A2 (en) | 1990-06-20 |
| CA2005792A1 (en) | 1990-06-16 |
| ATE94674T1 (en) | 1993-10-15 |
| DK638589A (en) | 1990-06-17 |
| TR24389A (en) | 1991-09-24 |
| DE58905624D1 (en) | 1993-10-21 |
| US5044734A (en) | 1991-09-03 |
| NO894627D0 (en) | 1989-11-21 |
| JPH02238486A (en) | 1990-09-20 |
| PT92593B (en) | 1995-09-12 |
| NZ231200A (en) | 1991-12-23 |
| FI896040A0 (en) | 1989-12-15 |
| BR8906533A (en) | 1990-08-28 |
| PT92593A (en) | 1990-06-29 |
| DK638589D0 (en) | 1989-12-15 |
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