Classifications

• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
  • H10K50/00—Organic light-emitting devices
  • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
  • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
  • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
• • 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
  • H05B33/26—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
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
  • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
  • H10K2102/301—Details of OLEDs
  • H10K2102/302—Details of OLEDs of OLED structures
  • H10K2102/3023—Direction of light emission
  • H10K2102/3031—Two-side emission, e.g. transparent OLEDs [TOLED]
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
  • H10K50/00—Organic light-emitting devices
  • H10K50/80—Constructional details
  • H10K50/805—Electrodes
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
  • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
  • H10K59/10—OLED displays
  • H10K59/17—Passive-matrix OLED displays
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
  • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
  • H10K71/841—Applying alternating current [AC] during manufacturing or treatment

Definitions

• the present invention relates to an electroluminescent device.
• Known electroluminescent devices of this type have a layer made of a luminescent dielectric which is located between two electrodes.
• the color of the light emitted by the luminescent layer during the operation of such a device is given by the material composition of the luminescent layer. This color cannot be changed with a given electroluminescent device.
• the object of the present invention is to eliminate this disadvantage and further disadvantages of the known electroluminescent devices.
• FIG. 3 shows a perspective and greatly enlarged the principle of a monochrome screen based on the present invention.
• FIG. 4 shows a perspective and greatly enlarged principle of a color screen and based on the present invention 5 in a vertical section and greatly enlarged, a section of the device according to FIG. 4, FIG. 5 showing the course of the individual layers of the device according to FIG. 4 after this device has been deep-drawn.
• the present electroluminescent device comprises an electroluminescent device 1, which is also referred to below only as an EL device.
• This EL device 1 has a first areal, i.e. Continuously extending electrode 2 made of an electrically conductive and at the same time transparent material. Materials of this type are generally known.
• Each of the large areas of this first electrode 2 is assigned a layer 3 or 4 made of a luminescent dielectric. These luminescent layers 3 and 4 are designed as coherent layers. The materials of these luminescent layers are chosen so that they can emit light with different wavelengths. Materials of this type are also generally known.
• a further electrode 5 or 6 is assigned to the large surface of the respective luminescent layer 3 or 4 facing away from the common electrode 2. These electrodes 5 and 6 are also transparent.
• the material of at least one of the above-mentioned luminescent layers 3 and 4 is transparent.
• the material of the first luminescent layer 3 could be transparent, while the material of the second luminescent layer 4 is not transparent.
• the EL device would only emit light in the direction designated by the letter A, the electrode 5 attached to the outside of the first luminescent layer 3 also being transparent, as stated above.
• the second luminescent layer 4 and the electrode 6 attached to its outer surface are transparent.
• This EL device 1 emits light only in the direction designated by the letter B if the first luminescent layer 3 is not transparent.
• the luminescent layers 3 and 4 as well as all three electrodes 2, 5 and 6 must be transparent.
• the large area of one of the outer electrodes 5 and 6 is assigned a carrier 7, to which the EL device 1 is attached.
• this carrier 7 is made of a transparent material, because in most applications it represents the front of the present EL device.
• the carrier 7 is not transparent and represents the back of the EL device 1.
• the carrier 7 can be rigid or bendable.
• the material of the carrier 7 can be such that this material can be deep-drawn in particular in three dimensions. This measure makes the area of applicability of the present EL device even larger.
• the EL layers 3 and 4 can only light up if a corresponding electrical voltage is applied to those electrodes 2 and 5 or 2 and 6 between which the relevant EL layer 3 or 4 is located.
• the present EL device comprises a feed device 10 designed accordingly, which serves as a device for controlling the luminescent layers 3 and 4 of the electroluminescent device 1.
• the first embodiment of such a feed device 10 shown in FIG. 1 comprises two voltage sources 11 and 12 which are connected in series. At the common point 13 of the series-connected sources 11 and 12, a conductor 14 is connected at one end, the other end of which is connected to the first or common electrode 2 of the EL device 1.
• the other terminal of the first voltage source 11 is connected via a first switch 15 to the second electrode 5, which is located on the outside or rear of the first EL layer 3.
• the other terminal of the second voltage source 12 is connected to the third electrode 6 via a second switch 16 connected, which is located on the outside or front of the second EL layer 4.
• the EL device can emit light with the color of the first EL layer 3 or light with the color of the second EL layer 4. If both switches 15 and 16 are conductive, the two EL layers 3 and 4 emit light. The result of this is that the EL device emits light with a color which results from the addition or subtraction of the colors of the EL layers 3 and 4.
• the electroiuminescent device 1 can have more than two transparent and coherent luminous layers (not shown) lying one above the other. In such a case, there is also a two-dimensional electrode between each two adjacent luminescent layers. This intermediate electrode or intermediate electrodes are also transparent. The free large areas of the outer luminous layers are also each provided with an electrode, at least the electrode 5 lying at the front being transparent. A voltage source is connected between two electrodes, approximately as shown in FIG. 1, so that such voltage sources form a cascade.
• FIG. 2 shows a second embodiment of the feed device 20 mentioned.
• This feed device 20 has only one feed source 21, to which a potentiometer 22 is connected in parallel.
• the first terminal of the supply source 21 and thus also the first terminal of the potentiometer 22 is connected via a first conductor 23 to the second or rear electrode 5 of the EL device.
• the second terminal of the feed source 21 and thus also the second terminal of the potentiometer 22 is connected via a second conductor 24 to the third or rear electrode 5 of the EL device 1.
• the tap 25 of the potentiometer 22 is connected via a third conductor 26 to the first or common electrode 2 of the EL device.
• the full voltage of the source 21 In the position of the tap 25 shown in FIG. 2, the two EL layers 3 and 4 are under tension, so that the two EL layers 3 and 4 light up. The result of this is that the EL device 1 emits light with a color which results from the addition or subtraction of the colors of the two EL layers 3 and 4.
• the front electrode 31 of this device 30 consists of strips 311, 312 etc. running parallel to one another and made of an electrically conductive and transparent material known per se. In the case shown, this set of strips 311, 312 etc. runs vertically.
• the electrode 32 of this device 30 located behind the EL layer 3 likewise consists of strips 321, 322, etc., which run parallel to one another and are made of an electrically conductive and transparent material which is known per se. In the illustrated case, this second set of strips 321, 322, etc. runs horizontally. 3 shows the lower left corner of such a black and white screen 30.
• the feed device (not shown) for this EL device 30 is constructed in a manner known per se in such a way that it can apply electrical voltage in succession to the individual electrode strips 311, 312 etc. and 321, 322 etc. in a predetermined manner. At a certain time, the voltage is applied to the electrode portions 311 and £ 2 /.
• the large surface of this carrier 7 facing the EL device 1 is mirrored or has a mirror layer. It is generally known that, for example, any color can be achieved on a screen by a combination of the colors yellow, red and blue.
• the present EL device 40 accordingly has three superimposed, coherent and transparent layers of a luminescent dielectric 3G, which can glow red, a luminescent dielectric 3R, which can glow blue, and a luminescent dielectric 3B, which can glow white.
• a luminescent dielectric 3G which can glow red
• a luminescent dielectric 3R which can glow blue
• a luminescent dielectric 3B which can glow white.
• the individual pigmented layers 3G, 3R and 3B are activated in the manner set out in connection with FIG. 3.
• electrode strips lying one behind the other are required for the control of all three luminescence dielectrics 3G, 3R and 3B.
• These three luminescence dielectrics 3G, 3R and 3B are such that they can emit light with different wavelengths.
• Fig. 4 shows two sets of electrodes which are required to control only a single point C of the front screen surface.
• the first vertical strip 311 of the front electrode 3 for FIG. 4 is taken from FIG. 3.
• the EL layer 3G is located behind this vertical strip 311.
• the first horizontal stripe G321 is located behind this EL layer 3G and therefore G is in front of the number of this horizontal stripe G321. To drive the pixel C so that it lights up, the voltage required for this is connected to the strips 311 and G321.
• the EL layer 3R Behind the horizontal strip G321 there is the EL layer 3R, which, like the EL layer 3G, has a large area and which therefore also has a plurality of electrode strips, namely both vertical and horizontal electrode strips.
• the control voltage is connected to the electrode strips G321 and R311 so that the pixel C lights up here.
• the horizontal strip G321 thus serves not only to control the EL layer 3G but also to control the EL layer 3R, in the same way as was described in connection with the common electrode 2 in FIG. 1.
• the flat EL layer 3B is located behind the vertical strip R311 and the horizontal strip B321 is arranged behind this EL layer 3B.
• the control voltage is connected to the electrode strips B321 and R311 so that the pixel C lights up here.
• the vertical strip R311 thus serves not only to control the EL layer 3R but also to control the EL layer 3B, in the same way as was described in connection with the common electrode 2 in FIG. 1.
• the horizontal stripe B321 on the other hand, only serves like the rear electrode 6 from FIG. 1. If the pixel C is to have a color which results from a combination of the stated primary colors, then corresponding voltages are applied to the relevant the electrode strip connected in a manner known per se.
• the control with the strip-shaped and intersecting electrodes can be referred to as matrix control. However, it is possible to control the transparent luminescent layers 3G, 3R and 3B point by point. Such point controls are also known per se.
• the present device can also be designed such that it can not only be bent, but also that it is three-dimensionally shaped, i.e. e.g. can be stretched or even deep drawn.
• FIG. 5 shows a detail from a deep-drawn point of the EL device 40, which is based on the illustration in FIG. 4.
• the section shown in FIG. 5 from the deep-drawn point of the flat screen 40 comprises two sections 28 and 29 which form an angle between them which is 90 degrees.
• the extremely high bendability of the EL device 40 in which the bending radius can even be below 1 millimeter, is possible because the material of the luminous layers 3B, 3R and 3B is very flexible and because the individual layers, i.e.
• the screen 40 according to FIG. 5 has a cover layer 34 which is applied to the outer electrode 31 1.
• Screens of the type described here have the advantages, among other things, that they are not sensitive to touch, that they can be bent, even deep-drawn, and that they can be used in the usual printing processes, such as e.g. in the screen printing process.

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• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Electroluminescent Light Sources (AREA)
• Illuminated Signs And Luminous Advertising (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2004
  • 2004-11-02 RU RU2006119292/09A patent/RU2382530C2/ru not_active IP Right Cessation
  • 2004-11-02 WO PCT/CH2004/000660 patent/WO2005043961A2/de not_active Ceased
  • 2004-11-02 AU AU2004307206A patent/AU2004307206B2/en not_active Ceased
  • 2004-11-02 JP JP2006538630A patent/JP2007510281A/ja active Pending
  • 2004-11-02 CN CNA2004800397330A patent/CN1902986A/zh active Pending
  • 2004-11-02 US US10/578,124 patent/US20070132367A1/en not_active Abandoned
  • 2004-11-02 EP EP04797219A patent/EP1683395A2/de not_active Ceased
  • 2004-11-02 KR KR1020117019071A patent/KR20110096185A/ko not_active Ceased
  • 2004-11-02 KR KR1020067008621A patent/KR20060126460A/ko not_active Withdrawn
  • 2004-11-02 CA CA002544295A patent/CA2544295A1/en not_active Abandoned
• 2006
  • 2006-05-03 ZA ZA200603506A patent/ZA200603506B/en unknown
• 2010
  • 2010-09-15 US US12/882,286 patent/US20110050094A1/en not_active Abandoned
• 2012
  • 2012-02-07 US US13/367,409 patent/US20120133277A1/en not_active Abandoned
  • 2012-02-29 JP JP2012044108A patent/JP2012138365A/ja active Pending

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