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WO1991010340A1 - Affichage plat a electroluminescence et procede d'obtention d'un tel affichage plat - Google Patents

Affichage plat a electroluminescence et procede d'obtention d'un tel affichage plat Download PDF

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Publication number
WO1991010340A1
WO1991010340A1 PCT/DE1990/000996 DE9000996W WO9110340A1 WO 1991010340 A1 WO1991010340 A1 WO 1991010340A1 DE 9000996 W DE9000996 W DE 9000996W WO 9110340 A1 WO9110340 A1 WO 9110340A1
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WO
WIPO (PCT)
Prior art keywords
layer
electrodes
color filters
color
display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE1990/000996
Other languages
German (de)
English (en)
Inventor
Gerhard Mahler
Regina MÜLLER-MACH
Gerd Otto MÜLLER
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.)
Berlin Brandenburg Academy of Sciences and Humanities
Fraunhofer Institut fuer Nachrichtentechnik Heinrich Hertz Institute HHI
Original Assignee
Berlin Brandenburg Academy of Sciences and Humanities
Fraunhofer Institut fuer Nachrichtentechnik Heinrich Hertz Institute HHI
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 Berlin Brandenburg Academy of Sciences and Humanities, Fraunhofer Institut fuer Nachrichtentechnik Heinrich Hertz Institute HHI filed Critical Berlin Brandenburg Academy of Sciences and Humanities
Publication of WO1991010340A1 publication Critical patent/WO1991010340A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/30—Picture reproducers using solid-state colour display devices
    • 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
    • G09F9/33—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 semiconductor devices, e.g. diodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/22—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/22—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
    • H05B33/24—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers of metallic reflective layers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode
    • H05B33/28—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode of translucent electrodes

Definitions

  • the invention relates to an electroluminescent flat display and to a method for producing such flat displays.
  • the areas of application of flat displays are in particular where the use of cathode-ray picture tubes is not expedient or not possible, e.g. with very small or very large-format optical display means.
  • Their pixel pitch is in the range between ⁇ m and a few mm.
  • For small format displays e.g. In the case of handheld or tabletop devices, there are generally no extreme demands on the color range, the intensity grading, etc. Cathode-ray color picture tubes would therefore be far too complex for such purposes.
  • a large and large format reproduction of moving color images is, for example, in the standard of high-definition television (HDTV) and for a viewing distance that corresponds to approximately twice the picture height, with cathode ray picture tubes for weight and other reasons, in particular construction-related reasons, and therefore no longer possible and therefore only realizable with projection devices.
  • HDTV high-definition television
  • flat displays offer the high resolution required for HDTV and are then competitive with projection devices or superior to those for home use, for example, if an otherwise comparable picture quality is achieved .
  • the essential target parameters can in principle be met with both plasma and liquid crystal and with electroluminescent flat displays. The following points of view speak in favor of electroluminescence thin film Giving displays good prospects for use in large quantities.
  • the excellent structuring ability of the electroluminescent display according to the invention up to color triple or quadruple dimensions in the range of a few ⁇ m enables use for spectacle displays, e.g. for future three-dimensional or stereoscopic HDTV applications in which the left-eyed image is imprinted on the left spectacle lens display, the right-eyed image is embossed on the right spectacle lens display.
  • the invention is based on a prior art as represented in this area by publications by S. Tanaka et al from the Tottori University in Japan.
  • this electroluminescence test pattern resembled the rule in that a film package comprising a transparent electrode, a first single-layer or multi-layer insulator film, a single-layer or multi-layer active semiconductor film and a second single-layer or multi-layer film was placed on a glass substrate Insulator film and a second electrode made of metal.
  • a simple and appropriate application of organic filters to the front of the glass substrate for these investigations is not acceptable in a large-scale implementation because the color filters are at least 1 mm thick from the emission layer. are separated and a good color impression only arises when viewed almost vertically, since a parallax occurs between the filter and the light source at an oblique angle.
  • the aim of the invention is small, but above all large-format, electroluminescent specialist displays which enable two, multiple or full colors and are distinguished by high image quality, low power consumption and low weight, and cost-effective production by means of flow production Enabling and automation of the manufacturing processes with good compatibility of less complex technological operations.
  • the invention is therefore based on the object of specifying an arrangement for a flat electroluminescent display, in which case a thin-film structure with white emitter and with color filters is to be assumed, and in which the viewing angle is not caused by parallax or interference effects is restricted.
  • the control of the pixels of the arrangement should take place, as is known per se, in the case of flat displays of a different type, but also with a pixel grid dimension already in the mm range.
  • the manufacturing process should be able to be carried out in as few subsections as possible with operations for which similar or, if possible, no special conditions with regard to vacuum, temperature, clean room conditions etc. have to exist, and which make it possible to position structures in perform different layers with little effort.
  • the layer pair ⁇ ket-carrying substrate plate is designed as the rear of the display, one in the layer package on the substrate plate Structured layer made of a metal as reflective electrodes, the first layer made of insulator material, the layer made of active phosphor or semiconductor material, the second layer made of insulator material and the second structured layer made of electrically highly conductive material as optically transparent electrodes in the order mentioned are arranged, and the color filters cover the transparent electrodes and form the further layer which is located on the front of the display facing
  • Forms of embodiment of the invention can namely differ significantly both in terms of the color and the format of a flat display and otherwise have a large number of identical or largely similar structural details.
  • the layer thicknesses and the materials of the solids are independent of whether it is the version as a variant for e.g. small-format, two-color alphanumeric representations or as the most convenient variant for large-format, full-color moving image reproduction in the HDTV standard.
  • the image pixel dimension in the mm range is decisive for the dimensions of the electrodes.
  • a full-color display requires triple color filters, i.e. it requires an area of e.g. 1 mm for each pixel. If only two colors are required per pixel in a flat display and the electrodes are designed in the same dimensions as for a full-color display, the is reduced
  • the pixel matrix can be controlled in series or columns.
  • the elements of the color triples per pixel must be very easy to mix, a two-color or multi-color flat display with a lower number of brightness levels of individual colors that are not to be mixed within a pixel, however, requires a less complex one in this respect Control.
  • the first layer structured as reflective electrodes, made of electrically conductive material
  • the second layer structured as transparent electrodes, made of electrically conductive materials.
  • a layer of indium-doped tin oxide, the layer of insulating material arranged adjacent to the respective layer of electrically good conducting material is formed in one or more layers and the layer of active phosphor or semiconductor material is in one or more layers and contain a layer of Sr (S, Se): Ce and / or SrS.Eu.
  • a second embodiment which is also advantageous as a further development of the aforementioned, relates to forming the reflective electrodes in strips and arranging them along an axis of symmetry of the substrate plate, and also to forming the transparent electrodes in strips, but orthogonally to the reflecting electrodes to be arranged continuously and as elements in two or more different colors and in a repetitive pattern for pixels, to form the color filters in strips and to arrange the transparent electrodes covering and in their direction, with each crossing point of one of the reflective electrodes and one of the transparent electrodes Electrodes forms a freely selectable pair of electrodes in a two-color, multi-color or full-color display.
  • the elements of the pixels are arranged in a repeat pattern of color squares.
  • the advantage of this is that, for example for weakly transmitting color filters, in particular for blue, in the case of pixels which function as a color triple, a larger radiation area is available for such colors.
  • the brightness of each of the two colors can be graduated more finely in this way.
  • a capping forming the front of the display can be arranged particularly expediently on the layer layer of the color filter. This serves as protection against contact and corrosion for the flat display and, in the case of smaller-sized flat displays, also for stabilizing the MISIM layer package and the color filter layer on the substrate plate.
  • a further embodiment which can be also applied to all inventive flat panel displays in the aforementioned embodiments advantageously, be ⁇ runs out to trigger the 'displays only on one longitudinal and one transverse side for the rows or columns of Arrange matrix electronic circuits. This is favorable both for a hybrid and for an integrated construction of flat displays and their associated electronic circuits.
  • the problem to be solved is to form a layer package on a substrate plate, which has a first structured layer made of electrically highly conductive material, a first layer made of insulator material, and a middle one Has layer of active phosphor or semiconductor material, a second layer of an insulator material and a second structured layer of electrically highly conductive material and a further structured layer layer in which color filters for the pixel elements are arranged.
  • the method according to the invention provides for the substrate plate, the lower surface of which subsequently forms the rear front of the display, to be provided on its upper surface with reflective electrodes made of metal, as the first structured layer made of electrically highly conductive material, then via and between the reflective 'electrodes, the first layer of insulating material, above the middle layer of active fluorescent or Halbleiterma; or more layers to separate, and erial dar ⁇ off via the second layer of insulator material, each ganz ⁇ surface and, on the second Layer of insulator material to deposit an electrically well-conducting and optically transparent material as a first homogeneous layer over the entire surface, now the further layer layer with the color filters on the front of the display over the initially still full-surface layer made of the optically transparent and electrically well-conductive material build up and then To form transparent electrodes covered by color filters, the structure of the color filters can be used as a mask for self-adjusting structuring of the layer made of the optically transparent, electrically conductive material.
  • the deposition of an optically transparent, electrically highly conductive material also belongs to conventional, already tried-and-tested technologies for the production of electroluminescence thin-film displays. In the method according to the invention, however, this layer is not the first but the last of the MISIM structure.
  • the technological section at the beginning of the manufacturing process according to the invention in which a metal layer is to be produced and structured as the first layer of the MISIM structure, has extensive similarities to operations that also apply to the production of flat plasma displays, specifically for their rear part , are to be carried out. In both cases, it is sufficient to free the substrate plates from coarse bumps, particles and streaks, so that the surfaces of the substrate plates can then be provided with electrodes made of metal.
  • both the color filters are built up and the electrodes are structured in the layer made of the optically transparent, electrically highly conductive material.
  • the operations which take place in this section result in the color filters being on the one hand very close to the white light emitter layer and on the other hand directly on the front of the display, that is to say they are easily accessible there without the end of production allow further final finishes. It is essential that the operations to build up dyeing filter and for structuring transparent electrodes are in the closest possible functional connection with each other and self-adjust the structures of the color filters and the transparent electrodes they cover. The requirements for compliance with tolerances of these structures are low; it is only necessary to ensure that structuring edges are not interrupted.
  • Embodiments of the manufacturing method according to the invention primarily relate to measures which are related to the structuring of layers.
  • it is particularly favorable to transfer a prefabricated decal image from a carrier film to the substrate plate.
  • This decal can be e.g. fix sufficiently on the substrate plate by melting.
  • the color filters can also be transferred as a prefabricated decal from a carrier film to the still unstructured layer of optically transparent, electrically highly conductive material.
  • the color filters can be fixed, for example, by means of an organic adhesive which, when cured, must be resistant to means for removing the optically transparent, electrically conductive material when the transparent electrodes are structured.
  • the generation of structures for electrodes and color filters in a geometrically simple, regular configuration can also take place by relative movement between the substrate plate and an apparatus which carries out the operations for structure formation. Such operations include, for example, the application of structures, already in their final design, or the removal of areas of layers previously applied over the entire surface.
  • the construction of the color filter can start with a decal that has been prepared elsewhere or on the still unstructured th layer of the optically transparent, electrically conductive material.
  • the finished structure of the color filter forms the mask, which is then used for the self-adjusting structuring of the transparent electrodes.
  • each color is already defined at this time.
  • the structured filters can be constructed in the individual colors simultaneously or separately for each color.
  • Another embodiment of this sub-section of the method according to the invention offers the advantageous possibility of first applying a full-surface layer of color-neutral, organic material over the layer of optically transparent, electrically highly conductive material, which is initially full-surface, to build up the layer layer with the color filters, then to generate the structures of the color filters and then - or in a common process step - the structures of the transparent electrodes and finally to color the previously structured and still color-neutral color filters with dyes in the desired colors.
  • a particularly preferred embodiment provides for the individual dyes to be introduced electrochemically into the color filter and for this purpose to selectively use the relevant transparent electrodes.
  • Green color filter 7 shows a variant for the formation of color triple pixels in the form of color quadruples;
  • Fig. 8 another variant with the effect as in Fig. 6 or Fig. 7;
  • a strip structure of reflective electrodes 2 made of chromium is initially on a substrate plate 1 made of glass.
  • This structured layer of metal as well as the single or multi-layer films i.e. a first layer of insulator material 3, a homogeneous layer of active phosphor or semiconductor material 4 that is single or multi-layered over the entire surface - to achieve a white emission e.g. a film made of Sr (S, Se): Ce and a film made of SrS: Eu -, a second layer made of insulator material 5 and a homogeneous layer 6 made of electrically conductive and optically transparent material, e.g. made of indium tin oxide (ITO), represent the MISIM structure.
  • ITO indium tin oxide
  • the primary colors run orthogonally to the strips of the reflective electrodes 2 on the layer 6 R (red), G (green), B (blue) transmitting color filters 7R, 7G, 7B formed from inorganic or organic materials, which were applied alternately in strips and by themselves or by means of a protective layer for the removal of material resist when structuring transparent electrodes 8.
  • Each three adjacent color strips forming the basic color filters 7R, 7G, 7B are repeated in a grid dimension of, for example, 1 millimeter, which also applies to three adjacent reflecting electrodes 2.
  • the transparent electrodes 8 are formed in strips from the layer 6, one of the color filters 7 in the primary colors R, G, B being assigned to each strip in a self-adjusting manner.
  • a subsequently applied capping 11 (not shown) provides the flat display 10 with sufficient protection against contact and forms its front, as indicated by an eye 9 of a viewer.
  • the structures shown in FIG. 2 are also intended to clarify the sequence of the method steps for the production of such flat displays.
  • the reflective electrodes 2 made of chromium are located on the substrate plate 1, here formed as wide strips with a grid dimension of, for example, 1 mm.
  • the layer of insulator material 3 covers the reflective electrodes 2 and also fills the parting lines between them.
  • the homogeneous layer above it consists of active phosphor or semiconductor material 4 and forms the white light emitter layer. Thereon This is followed by the second layer of insulator material 5 and then the layer 6 of optically transparent, electrically highly conductive material, which is initially applied over the entire surface.
  • the stripe-shaped color filters 7R, 7G, 7B are orthogonal to the reflecting electrodes 2 and have a raster dimension of 1 mm for this repeating pattern on the layer 6, which is initially still unstructured.
  • the thickness of the MISIM layer package on the substrate plate 1 is approximately 2 ⁇ m in total. Approx. 50 nm are allotted to the reflecting electrodes 2, approx. 200 nm to 300 nm to the layers of the insulator materials 3, 4, approx. 1,000 nm to the layer of the active phosphor or semiconductor material 4 and almost 6 nm on the layer 6 made of optically transparent, electrically highly conductive material.
  • the structure of the color filters 7R, 7G, 7B serves as a mask for structuring the transparent electrodes 8 in the layer 6.
  • the color filters 7 thus cover the transparent electrodes 8 in a self-adjusting manner and are located on the front of the viewer, symbolized by an eye 9 Flat displays 10.
  • the colors traversed by the color filters 7R, 7G, 7B triggered pixels mix in accordance with their respective intensities and thus enable any desired color tone in the desired brightness.
  • electronic circuits 13, 14 drawn as blocks are provided on the longitudinal and transverse sides of the flat display 10 for the optional control of the pixels 12, some of which are indicated in the detail of the capping 11. These contain e.g. Column and row drivers.
  • For row or column serial control two circuit sets are provided in a manner known per se in one of the two electronic circuits 13, 14, one of which works in the write cycle, the other in the read cycle.
  • the amplitude values or the control pulses of all pixel color elements of a row or a column of the matrix thus simultaneously arrive in the relevant row or column, which are switched on in time by the assigned electronic circuit 14, 13.
  • FIG. 4 shows an exemplary embodiment of the invention for a flat screen with four mirror-symmetrically constructed flat displays IQ which are joined to one another without interruption of the grid dimension.
  • This ability to connect and fit the flat display 10 is possible because an electroluminescent display as a solid -Buildings (all solid state) no locking edges required.
  • the respective pixels 12 are actuated simultaneously on each of the four flat displays 10, so that the maximum permissible duration of a control voltage or a control pulse for each pixel 12 in comparison with a flat display 10 occurs for the flat screen according to FIG. 4 the same number of pixels increases, but at the same time reduces the capacitive load of the drivers.
  • the embodiments of the invention thus meet the requirements for full-color displays, that is to say maximum requirements for the display devices for color television, in particular for high-definition television - HDTV. So far e.g. no full color suitability for computer applications, handheld or table-top devices or for other types of optically indicating information output, such as those for advertising purposes, traffic control devices and warning signs on streets or notice boards at train stations and airports, no high gradation of the brightness values and / or resolution is required, details can be easily modified.
  • Electroluminescent flat-panel displays can also be designed in many ways within the framework of the technical teaching according to the invention with regard to the implementation of selectively controllable pixels 12.
  • 5 shows a section of a matrix of pixels 12 which consist of elements for the three primary colors R (red), G (green) and B (blue) and in which the electrode pairs at each pixel 12 each have a reflective electrode 2 and in each case three transparent electrodes 8 are formed.
  • the electrodes 2, 8 and the color filters 7 are designed in the form of strips.
  • the colors of the color filters can differ repeating pattern R, G, B, .... R, G, B, or for example also B, R, G, G, R, B, B, ..., may be arranged.
  • both arrangements are fundamentally equal.
  • FIG. 1 is an embodiment with three reflecting electrodes 2 per pixel 12.
  • FIG. 6 shows an embodiment variant in which, in view of the comparatively high absorption of blue filters, their area is designed to be larger than that of the green and red filters. Since the human eye perceives a pixel 12 at the intended - normal - viewing distance as the smallest resolvable unit, its color elements merge, so that their repetitive patterns can be chosen arbitrarily, e.g. with the wide stripe of the blue filter B in the middle between green filter G and red filter R or on the side of the green / red filter pair G / R.
  • FIG. 7 and 8 show R-G-B pixels 12, which function functionally as color triples, constructively - cf. Fig. 7 - but are designed as a quadruple.
  • the repeat patterns extend two-dimensionally. As a result, the number of color filter strips per pixel 12 or the pixel pitch in one direction is reduced. For this, the coloring of the color filter strips, compare in particular FIG. 7, and also the control and the formation of the structure for the reflecting electrodes 2 are more complex.
  • FIG. 9 shows, in general form, two possibilities for the formation of pixels 12 of a two-color flat display on the basis of a white light electroluminescence emitter with color filters 7F1 and 7F2.
  • 12 are to be provided for each pixel: for example: two strips of reflective electrodes 2 and a strip for the transparent electrode 8, covered by two immediately adjacent strips for the color filters 7F1, 7F2; or: one strip for the reflective electrode 2 and two strips for transparent electrodes 8 each covered by color filter strips 7F1, 7F2; or: hereafter easily derived intermediate forms.
  • the stripe-shaped color filters 7R, 7G, 7B run e.g. in the direction of the lines of the flat display 10.
  • a special structuring of reflecting electrodes 2R, 2B, 2G with three nested surfaces connected by webs is provided for this purpose in the variant shown here .
  • the counter electrodes 8 can then be formed as wide strips corresponding to the pixel grid dimension.
  • the variant shown in FIG. 11 corresponds to the structure shown in FIG. 2.
  • the stripe-shaped color filters 7R, 7G, 7B should lie in the direction of the columns of the flat display.
  • the flat displays 10 can usually be constructed and used either with color filter strips running in the row or in the column direction.
  • curved designs can also be considered, for example for the purpose of radiation-optical corrections in the case of large flat and concave curved electroluminescent flat displays 10.
  • the workpiece is the substrate plate 1 with the layer to be structured thereon
  • the apparatuses 15 for imaging or forming the structures contain, for example, a template, the number and size of parallel strips being slit or the pattern to be repeated (see, for example, FIG. 10 for the reflecting electrodes 2) is punched out once as a positive or negative containing.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Des affichages plats à électroluminescence à film mince fournissant une coloration efficace peuvent être formés au moyen d'une couche émettrice de lumière blanche (4) et de filtres colorés (7). Ils sont utilisés sous la forme de moyens d'affichage optiques bicolores, multicolores ou en couleurs pures, en très petits formats ou en très grands formats, avec une dimension de trame comprise entre le micron et plusieurs millimètres, principalement pour la restitution d'images animées en couleurs en formats minimums, grands formats et formats maximums, par exemple pour télévision à haute définition (HDTV). Grâce à la plaque-support (1) de l'affichage plat, constituant sa face arrière, aux électrodes (2) et aux filtres colorés (7) à réflexion structurée directement sur la plaque-support (1), devant des électrodes transparentes (8) sur la face avant de l'affichage plat, on peut éviter le parallaxe et des distorsions chromatiques, cependant qu'il est possible d'obtenire une structuration auto-réglable des électrodes transparentes (8) recouvertes par les filtres colorés (7).
PCT/DE1990/000996 1989-12-21 1990-12-21 Affichage plat a electroluminescence et procede d'obtention d'un tel affichage plat Ceased WO1991010340A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3942699.8 1989-12-21
DE19893942699 DE3942699A1 (de) 1989-12-21 1989-12-21 Elektrolumineszenz-flachdisplay und verfahren zur herstellung derartiger flachdisplays

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WO1991010340A1 true WO1991010340A1 (fr) 1991-07-11

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US5519414A (en) * 1993-02-19 1996-05-21 Off World Laboratories, Inc. Video display and driver apparatus and method
US5802946A (en) * 1995-03-02 1998-09-08 Sandvik Ab Drive device for chain saw

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JP4482966B2 (ja) * 1999-08-20 2010-06-16 Ｔｄｋ株式会社 Ｅｌ表示装置

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Title
JAPANESE BAND JOURNAL OF APPLIED PHYSICS band28,nr.8,teil1,august 1989 & al.:"white light emitting thin film..." *p.1373-1377 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5519414A (en) * 1993-02-19 1996-05-21 Off World Laboratories, Inc. Video display and driver apparatus and method
US5802946A (en) * 1995-03-02 1998-09-08 Sandvik Ab Drive device for chain saw

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