ELECTROLUMINESCENCE SYSTEM WITH TRANSPARENT ELECTRODES

• US 20110050094A1
• Filed: 09/15/2010
• Published: 03/03/2011
• Est. Priority Date: 11/03/2003
• Status: Abandoned Application

• Current Assignee: Bayer Materialscience AG (Covestro AG)
• Original Assignee: Bayer Materialscience AG (Covestro AG)
• Inventors: Knechtli-Tschudi, Adelheid, Enz, Emil
• Application Number:
  US12/882,286
• Publication Number:
  US 20110050094A1
• Time in Patent Office: Days
• US Class Current: 313/506
• CPC Class Codes: H10K 2102/3031 Two-side emission, e.g. transparent OLEDs [TOLED]
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays
• CPC Class Codes: H10K 71/841 Applying alternating current [AC] during manufacturing or treatment

Abstract

The electroluminescent system comprises an electroluminescent device (1) having a first, two-dimensional electrode (2) made of a transparent material. A layer (3,4) made of luminescent dielectric is assigned to each of the large surfaces of said first electrode (2). Said luminescent layers (3,4) are transparent and are made of materials that can emit light with different wavelengths. An electrode (5,6) is assigned to each large surface of the luminescent layers (3, 4) opposite the common electrode (2). A support layer (T) which is also made of transparent material is located on the front side of said electroluminescent device (1). A voltage source (11, 12) is connected between two successive electrodes (5, 2, 6).

Claims

1. An electroluminescence system comprising an electroluminescence device which is activatable by alternating current and has a first flat electrode of a transparent material, whereby to each of the large surfaces of this first electrode a layer of a luminescent dielectric is allocated and a second electrode is allocated to the large surface of the luminescent layer concerned facing away from the common electrode, wherein both the electrodes and the luminescent layers are transparent.

2. A system according to claim 1, wherein the electroluminescence device has more than two transparent luminescent layers lying above each other, whereby between every two luminescent layers is arranged a transparent electrode and the free large surfaces of the outside luminescent layers are also fitted with an electrode.

3. A system according to claim 2, wherein the electroluminescence device has three transparent luminescent layers above each other.

4. A system according to claim 1, wherein the luminescent layers are made of materials which can emit light at different wavelengths.

5. A system according to claim 1, wherein the extensive electroluminescence device has at least one point with a three-dimensional deformation, that this deformation has a radius which is less than 1 mm, wherein the deformed points are connected by at least two sections of the electroluminescence device, between which extends an angle which can amount to 90°

.

6. A system according to claim 1, including a device to control the luminescent layers of the electroluminescence device.

7. An electroluminescence system comprising an electroluminescence device which is activatable by alternating current and having at least one layer of a luminescent dielectric, whereby an electrode is allocated to each of the large surfaces of this luminescent layer, wherein the electrode concerned is designed as a set of parallel strips of an electrically conductive material, such that the directions of these sets of strips are perpendicular to each other, and a control device is provided which is designed so that the electrode strips can be connected individually to an energy source.

8. A system according to claim 7, wherein the luminescent layer is designed as a cohesive layer.

9. A system according to claim 7, wherein the electroluminescence device has several transparent layers of luminescent dielectric lying above each other, that the luminescence dielectrics of the luminescent layers are such that they can emit light of different wavelengths, such that between every two such luminescent layers is arranged a strip electrode and that the free surfaces of the outside luminescent layers each have a strip electrode.

10. A system according to claim 7, wherein a reflective layer is allocated to the rear of the electroluminescence device such that the reflected surface of this layer faces the luminescent layers of the electroluninescence device.