DE3145127C2 - - Google Patents

Info

Publication number
DE3145127C2
DE3145127C2 DE3145127A DE3145127A DE3145127C2 DE 3145127 C2 DE3145127 C2 DE 3145127C2 DE 3145127 A DE3145127 A DE 3145127A DE 3145127 A DE3145127 A DE 3145127A DE 3145127 C2 DE3145127 C2 DE 3145127C2
Authority
DE
Germany
Prior art keywords
film
display device
luminance
lamp
light source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE3145127A
Other languages
German (de)
Other versions
DE3145127A1 (en
DE3145127C3 (en
Inventor
Peter Dr. 7505 Ettlingen De Knoll
Winfried Dr. 7500 Karlsruhe De Koenig
Wolfgang Dr. 7514 Eggenstein De Ziegler
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE3145127A priority Critical patent/DE3145127C3/en
Priority to US06/346,507 priority patent/US4502761A/en
Priority to GB8206202A priority patent/GB2094996B/en
Publication of DE3145127A1 publication Critical patent/DE3145127A1/en
Priority to JP1120579A priority patent/JPH02160280A/en
Publication of DE3145127C2 publication Critical patent/DE3145127C2/de
Application granted granted Critical
Publication of DE3145127C3 publication Critical patent/DE3145127C3/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/13336—Combining plural substrates to produce large-area displays, e.g. tiled displays
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133604—Direct backlight with lamps

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Optical Elements Other Than Lenses (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von Verfahren nach der Gattung der Ansprüche 1 oder 2.The invention is based on methods according to the category of claims 1 or 2.

Aus der US-PS 42 06 501 ist eine von hinten beleuchtete Anzei­ gevorrichtung bekannt, wobei zwischen einer Lichtquelle und der Anzeige eine Streuscheibe angeordnet ist, die zur gleichmäßigen Ausleuchtung der Anzeige eine ortsabhängige Schwärzung aufweist. Zonen hoher Leucht­ dichte werden stärker abgeschattet als Zonen geringerer Leuchtdichte. Die Streuscheibe ist als Folie mit mehr oder weniger dicht verteilten Punkten auf fotografischem Weg hergestellt.From US-PS 42 06 501 is a backlit display known device, being between a light source and the display a diffuser is arranged for uniform illumination the display has a location-specific blackening. Zones of high luminosity densities are shaded more than zones with lower luminance. The lens is a film with more or less densely distributed Dots made in a photographic way.

Der Erfindung lag die Auf­ gabe zugrunde, ein Herstellungsverfahren für die Folie anzugeben, das den fotografischen Weg vermeidet.The invention was based on was based on specifying a production process for the film that avoids the photographic path.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Verfahren gemäß Anspruch 1 weist den Vorteil auf, daß auf der Folie Kreise angeordnet sind, die am Ort der Lampe am dich­ testen sind und zum Rand der Folie in größeren Abständen angeordnet sind.The inventive method according to claim 1 has the advantage that circles are arranged on the slide, which at the location of the lamp on you test and are arranged at greater distances from the edge of the film are.

Besonders vorteilhaft ist es, daß die Kreise so angeordnet sind, daß das Verhältnis von Strichbreite zu Linienabstand proportional zur drit­ ten Potenz des Winkels zwischen der Lampe und der Fläche ist. Durch diese Maßnahmen sind die Folien auf einfache Art und Weise durch Be­ rechnung herstellbar. It is particularly advantageous that the circles are arranged so that the ratio of line width to line spacing proportional to the third is the power of the angle between the lamp and the surface. By these measures are the slides in a simple way by Be bill can be produced.  

Diese Methode ist insbesondere dann vorteilhaft anwendbar, wenn die An­ zeigevorrichtung punktförmig von einer Lichtquelle beleuchtet wird.This method is particularly applicable when the An Pointing device is illuminated point by point by a light source.

Das erfindungsgemäße Verfahren gemäß dem zweiten Anspruch weist eben­ falls den Vorteil auf, ohne den Umweg über ein fotografisches Verfahren zu der Folie zu gelangen. Bei der Folienherstellung wird zunächst die Leuchtdichteverteilung der Anzeigevorrichtung ohne zwischengelegte Folie punktförmig abgetastet. Danach werden die Flächenpunkte ermit­ telt, die die Stellen höherer Leuchtdichte reduzieren, wobei die mini­ mal gemessene Leuchtdichte die Helligkeit der Anzeigevorrichtung be­ stimmt.The inventive method according to the second claim just points if the advantage is on, without going through a photographic process to get to the slide. The first step in film production is Luminance distribution of the display device without interposed Point scanned foil. Then the surface points are determined means that reduce the places of higher luminance, the mini times measured luminance be the brightness of the display device Right.

Das erfindungsgemäße Verfahren gemäß Anspruch 1 oder 2 weist insbeson­ dere den Vorteil auf, daß die Problematik, die richtige Gradation eines Filmes einzustellen, umgangen wird.The inventive method according to claim 1 or 2 has in particular the advantage that the problem, the correct gradation of a Film is circumvented.

Weitere Einzelheiten werden anhand der folgenden Beschreibung näher er­ läutert.Further details are based on the following description purifies.

Zeichnungdrawing

Fig. 1 zeigt ein Schnittbild durch eine Anzeigevorrichtung, die Fig. 1 shows a sectional view through a display device, the

Fig. 2 und 3 zeigen eine Anordnung von Kreisen bzw. Rasterpunkten auf einer Folie der Anzeigevorrichtung gemäß Fig. 1. Fig. 2 and 3 show an arrangement of circles or dots on a film of the display device of FIG. 1.

Fig. 1 zeigt als Beispiel für eine passive Anzeigevorrichtung eine Flüssigkristall-(LC-)Anzeige. Die LC-Anzeige weist einen Polarisator 11, eine Glasplatte 12, einen Flüssigkristall 13, eine weitere Glasplatte 14 und eine Polarisator-Transflektor-Kombination 15 auf. Diese LC-Anzeige ist auf bekannte Art und Weise hergestellt. Fig. 1 shows display as an example of a passive display device, a liquid crystal (LC). The LC display has a polarizer 11 , a glass plate 12 , a liquid crystal 13 , a further glass plate 14 and a polarizer-transflector combination 15 . This LC display is manufactured in a known manner.

Hinter der LC-Anzeige ist eine Folie 16 und eine Lampe 18 angeordnet. Auf der Folie 16 sind Rasterpunkte 1 er­ kennbar. Weiterhin ist der Beleuchtungswinkel von der Lampe 18 zu Rasterpunkten 1 der Folie 16 eingezeichnet. Ein Beispiel der Ausgestaltung der Rasterfolie 16 mit kreisförmigen Ringen 17 zeigt die Fig. 2. Wird nämlich die Anzeigevorrichtung nur von einer punktförmigen Licht­ quelle beleuchtet und sind gegebenenfalls vorhandene, in Fig. 1 nicht dargestellte Leiterbahnführungen und Bau­ teile gleichmäßig über der Trägerplatte verteilt, so ist der lokale transmittierte Lichtstrom, da er proportional zur Beleuchtungsstärke auf der Rückseite der Folie 16 ist, proportional zur dritten Potenz des cos des Beleuchtungs­ winkels. Die Lichtstromverteilung ist dann rotations­ symmetrisch. Durch ein kreisförmiges Linienfilter, bei dem das Verhältnis von Strichbreite zu Linienabstand pro­ portional zur dritten Potenz des cos des Beleuchtungs­ winkels zunimmt, wird der transmittierte mittlere Licht­ strom und damit die örtliche Leuchtdichte der Anzeige­ vorrichtung auf ein einheitliches Niveau reduziert, so daß die Ausleuchtung gradientenfrei erfolgt. Befinden sich zwischen der Anzeigevorrichtung und der Lampe 18 gleichmäßig verteilte Bauelemente, so ist der Abstand der Kreise untereinander experimentell zu ermitteln. Durch dieses Verfahren ist der früher übliche Umweg über eine Be­ lichtung eines Planfilmes nicht mehr erforderlich. Die Kreisabstände können teilweise theoretisch er­ rechnet werden und direkt auf die Rasterfolie 16 auf­ gebracht werden.A film 16 and a lamp 18 are arranged behind the LC display. Raster dots 1 are recognizable on the film 16 . Furthermore, the angle of illumination from the lamp 18 to raster points 1 of the film 16 is shown. An example of the design of the raster film 16 with circular rings 17 is shown in FIG. 2. Namely, if the display device is illuminated only by a punctiform light source and any conductor track guides and construction parts not shown in FIG. 1 are evenly distributed over the carrier plate, so is the local transmitted luminous flux, since it is proportional to the illuminance on the back of the film 16 , proportional to the third power of the cos of the lighting angle. The luminous flux distribution is then rotationally symmetrical. By means of a circular line filter, in which the ratio of line width to line spacing increases proportionally to the third power of the cos of the lighting angle, the transmitted mean luminous flux and thus the local luminance of the display device is reduced to a uniform level, so that the illumination is gradient-free he follows. If there are evenly distributed components between the display device and the lamp 18 , the spacing of the circles from one another can be determined experimentally. With this method, the previously usual detour via exposure of a sheet film is no longer necessary. The circle distances can be calculated theoretically in part and brought directly to the grid film 16 .

Im allgemeinen Fall ist eine Rasterfolie nach Fig. 3 günstig. Hierbei ist es möglich, mehrere Lichtquellen einzusetzen und eventuell vorhandene Bauelemente zwischen der Anzeigevorrichtung und der Lampe 18 ungleichmäßig zu verteilen. Hierbei wird bei fehlender Folie 16 die Leuchtdichteverteilung auf der Anzeigevorrichtung vor dem Polarisator 11 punktförmig abgetastet. Der Punkt mit der minimalen Leuchtdichte bestimmt das Niveau der Aus­ leuchtung der gesamten Anzeigevorrichtung. Durch Raster­ punkte 1 werden die Punkte höherer Leuchtdichte so abgedunkelt, daß sich ebenfalls die minimale Leucht­ dichte einstellt. Die Rasterpunkte 1 sind dabei umso größer, je höher die Leuchtdichte ursprünglich an die­ sem Punkt war. Die Fig. 3 zeigt hierzu ein Beispiel. In beiden Fällen läßt sich die Folie 16 mit den Punkten 1 in geeigneter Weise auf einer eventuell mit einer Meßwerterfassungsanlage gekoppelten Rechenanlage be­ rechnen und direkt mit einem Plotter auf der Raster­ folie aufbringen. Dies wird sich insbesondere bei kleineren Stückzahlen als vorteilhaft erweisen. Günstig ist es auch hier, daß der früher übliche Umweg über den Planfilm entfällt.In the general case, a screen film according to FIG. 3 is favorable. It is possible to use several light sources and to distribute any components that are present between the display device and the lamp 18 unevenly. If the film 16 is missing, the luminance distribution on the display device in front of the polarizer 11 is scanned in a punctiform manner. The point with the minimum luminance determines the level of illumination from the entire display device. By grid points 1 , the points of higher luminance are darkened so that the minimum luminance is also set. The grid points 1 are larger the higher the luminance was originally at this point. FIG. 3 shows an example of this. In both cases, the film 16 can be calculated with the points 1 in a suitable manner on a computer system possibly coupled to a data acquisition system and applied directly to the grid film using a plotter. This will prove to be particularly advantageous for smaller quantities. It is also favorable here that the previously usual detour via the flat film is no longer necessary.

Claims (2)

1. Verfahren zur Herstellung einer Folie für eine Vorrichtung zur gra­ dientenfreien Ausleuchtung von passiven Anzeigevorrichtungen mit einer Lichtquelle, die hinter der passiven Anzeigevorrichtung angeordnet ist, wobei die Folie zwischen der Anzeigevorrichtung und der Lichtquelle an­ geordnet ist, welche die Zonen hoher Leuchtdichte stärker abschattet als die Zonen geringer Leuchtdichte, dadurch gekennzeichnet, daß auf die Folie (16) konzentrische Kreise (17) aufgebracht werden, die am Ort der Lampe (18) am dichtesten sind und zum Rand der Folie (16) in größeren Abständen angeordnet sind, und daß das Verhältnis von Strichbreite zum Linienabstand proportional zur dritten Potenz des Winkels zwischen der Lampe und der Fläche ist.1. A method for producing a film for a device for the gra service-free illumination of passive display devices with a light source which is arranged behind the passive display device, the film being arranged between the display device and the light source, which shadows the zones of high luminance more than the zones of low luminance, characterized in that concentric circles ( 17 ) are applied to the film ( 16 ), which are most dense at the location of the lamp ( 18 ) and are arranged at greater distances from the edge of the film ( 16 ), and that the ratio of line width to line spacing is proportional to the third power of the angle between the lamp and the surface. 2. Verfahren nach dem Oberbegriff des Anspruchs 1, dadurch gekenn­ zeichnet, daß die Leuchtdichteverteilung der Anzeigevorrichtung ohne zwischengelegte Folie (16) punktförmig abgetastet wird und die Flächenpunkte (1) bestimmt werden, durch die Stellen höherer Leucht­ dichte reduzierbar sind und die minimale gemessene Leuchtdichte die Helligkeit der Anzeigevorrichtung bestimmt.2. The method according to the preamble of claim 1, characterized in that the luminance distribution of the display device is intermittently scanned without an interposed film ( 16 ) and the surface points ( 1 ) are determined by the locations of higher luminance can be reduced and the minimum measured luminance determines the brightness of the display device.
DE3145127A 1981-03-13 1981-11-13 Method for producing a film for a device for the gradient-free illumination of passive display devices Expired - Lifetime DE3145127C3 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE3145127A DE3145127C3 (en) 1981-03-13 1981-11-13 Method for producing a film for a device for the gradient-free illumination of passive display devices
US06/346,507 US4502761A (en) 1981-03-13 1982-02-08 Gradient-free illumination of passive readout display devices
GB8206202A GB2094996B (en) 1981-03-13 1982-03-03 Apparatus for the gradient free illumination of surfaces and a method for their manufacture
JP1120579A JPH02160280A (en) 1981-03-13 1989-05-16 Apparatus for lighting passive display

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3109643 1981-03-13
DE3145127A DE3145127C3 (en) 1981-03-13 1981-11-13 Method for producing a film for a device for the gradient-free illumination of passive display devices

Publications (3)

Publication Number Publication Date
DE3145127A1 DE3145127A1 (en) 1982-09-23
DE3145127C2 true DE3145127C2 (en) 1989-09-07
DE3145127C3 DE3145127C3 (en) 1996-08-01

Family

ID=6127135

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3145127A Expired - Lifetime DE3145127C3 (en) 1981-03-13 1981-11-13 Method for producing a film for a device for the gradient-free illumination of passive display devices

Country Status (2)

Country Link
JP (1) JPS57165887A (en)
DE (1) DE3145127C3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004028295B4 (en) * 2003-06-16 2014-07-17 Denso Corporation display console

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123369A1 (en) * 1981-06-12 1983-02-03 Vdo Schindling Optical waveguide
DE3302156C2 (en) * 1983-01-22 1989-11-23 Borg Instruments GmbH, 7537 Remchingen Lighting device for a transmissively operable passive display
JPS6044076U (en) * 1983-08-31 1985-03-28 シャープ株式会社 Light box for display device
DE3331724A1 (en) * 1983-09-02 1985-03-21 Robert Bosch Gmbh, 7000 Stuttgart ARRANGEMENT FOR LIGHTING PASSIVE INDICATORS
DE3543014A1 (en) * 1985-12-05 1987-06-11 Hinrichs Fotowerbung Gmbh LIGHTBOX FOR DIAPOSITIVE
DE3833960A1 (en) * 1988-10-06 1990-04-26 Karl Gerhard Luminous screen (light screen, illuminated disc)
DE4135506C2 (en) * 1991-10-28 1994-06-16 Triumph Adler Ag Backlit display device and method for manufacturing a diffusing sheet for such a display device
DE102005011411A1 (en) * 2005-03-11 2006-09-14 Siemens Ag Luminous density distribution producing method for LCD-display, involves detecting and recording luminous density distribution of white picture, and detecting compensation picture from minimum luminous density and recorded distribution

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2384578A (en) * 1943-03-10 1945-09-11 Bausch & Lomb Optical element
DE854550C (en) * 1950-09-09 1952-11-06 Edmund Dr Germer Elongated high pressure metal vapor discharge tubes with uniform radiation emission and process for their manufacture
DE886581C (en) * 1951-07-17 1953-08-17 Siemens Ag Electric street lamp with a diffuser that is open at the bottom
CH389538A (en) * 1961-08-29 1965-03-31 Belmag Beleuchtungs & Metallin Lighting fixture with cover glass
US3241256A (en) * 1963-05-13 1966-03-22 Bendix Corp Method and means for integrally lighting an indicator with uniform brightness and with light conservation
US3833802A (en) * 1972-05-15 1974-09-03 Gen Electric Wide angle optical system for uniform planar illumination
DE2249572A1 (en) * 1972-10-10 1974-04-18 Werner Deiwiks LIGHT REFLECTORS TO ACHIEVE EVENLY ILLUMINATED AREAS WITHOUT LIGHT LOSS
DE2337314C3 (en) * 1973-07-23 1980-04-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Measuring element for detecting the direction of energy in an electrical network
DE2432279A1 (en) * 1974-07-05 1976-01-22 Andreas Dr Ing Braun Testing of HV power line - involves deriving test value, modulating it, transmitting it to low voltage side and demodulating
CH609194B5 (en) * 1976-05-20 1979-08-31 Ebauches Sa Electro-optical passive display device
CH618294A5 (en) * 1977-09-06 1980-07-15 Bbc Brown Boveri & Cie
US4157215A (en) * 1978-04-24 1979-06-05 Rca Corporation Photodeposition of CRT screen structures using cermet IC filter
US4206501A (en) * 1978-06-12 1980-06-03 Motorola, Inc. Apparatus and methods for back illuminating a display surface
DE3021003A1 (en) * 1980-05-30 1981-12-03 Siemens AG, 1000 Berlin und 8000 München Measuring flow direction in electrical power supply - using bias voltage for two pulse-generating comparators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004028295B4 (en) * 2003-06-16 2014-07-17 Denso Corporation display console

Also Published As

Publication number Publication date
DE3145127A1 (en) 1982-09-23
JPS57165887A (en) 1982-10-13
DE3145127C3 (en) 1996-08-01

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