Organisches Leuchtbauelement

• US 20080143250A1
• Filed: 12/12/2007
• Published: 06/19/2008
• Est. Priority Date: 12/14/2006
• Status: Abandoned Application

• Current Assignee: Novaled AG
• Original Assignee: Novaled AG
• Inventors: Birnstock, Jan, Blochwitz-Nimoth, Jan, Murano, Sven
• Application Number:
  US11/954,628
• Publication Number:
  US 20080143250A1
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 50/854 comprising scattering means
• CPC Class Codes: H10K 59/805 Electrodes
• CPC Class Codes: H10K 59/84 Parallel electrical configurations of multiple OLEDs
• CPC Class Codes: H10K 59/86 Series electrical configurations of multiple OLEDs
• CPC Class Codes: H10K 59/877 comprising scattering means

Abstract

The invention relates to an organic lighting component, in particular an organic light-emitting diode, comprising a lighting element (1; 2) and a luminous surface (1f, 2f) encompassed by the lighting element (1; 2), the luminous surface being formed by an electrode (1a; 2a), a counterelectrode (1d; 2d), and an organic layer system (1e; 2e) which is situated between the electrode (1a; 2a) and the counterelectrode (1d; 2d) and is in electrical contact with the electrode (1a; 2a) and the counterelectrode (1d; 2d), wherein sections of the organic layer system (1e; 2e) which are located in the region of the luminous surface (1f; 2f) and which emit light upon application of an electrical voltage to the electrode (1a; 2a) and the counterelectrode (1d; 2d) have a uniform organic material structure and are provided on multiple partial electrodes (1b; 2b) of the electrode (1a; 2a) electrically connected in parallel, on one side the multiple partial electrodes being electrically connected to one another at their ends, and in which a lateral distance between adjacent partial electrodes (1b; 2b) is smaller than the width of the adjacent partial electrodes (1b; 2b).

Claims

1. Organic lighting component, in particular an organic light-emitting diode, comprising:

a lighting element and

a luminous surface encompassed by the lighting element the luminous surface being formed by an electrode, a counterelectrode, and an organic layer system which is situated between the electrode and the counterelectrode and is in electrical contact with the electrode and the counterelectrode,

wherein sections of the organic layer system which are located in the region of the luminous surface and which emit light upon application of an electrical voltage to the electrode and the counterelectrode have a uniform organic material structure and are provided on multiple partial electrodes of the electrode electrically connected in parallel, on one side the multiple partial electrodes being electrically connected to one another at their ends, and in which a lateral distance between adjacent partial electrodes is smaller than the width of the adjacent partial electrodes.

2. Lighting component according to claim 1, characterized in that the lateral distance between the adjacent partial electrodes is smaller than half the width of the adjacent partial electrodes.

3. Lighting component according to claim 1, characterized in that the lateral distance between the adjacent partial electrodes is smaller than one-third the width of the adjacent partial electrodes.

4. Lighting component according to claim 1, characterized in that the multiple partial electrodes are provided as strip electrodes.

5. Lighting component according to claim 4, characterized in that the strip electrodes are provided so as to extend in straight lines.

6. Lighting component according to claim 1, characterized in that the organic layer system is provided essentially continuously in the region of the luminous surface.

7. Lighting component according to claim 1, characterized in that the number of multiple partial electrodes of the electrode is at least 10, preferably at least 30, and particularly preferably at least 100.

8. Lighting component according to claim 1, characterized by a maximum operating voltage for the lighting element of less than 10 V, preferably less than 6 V, and particularly preferably less than 4 V.

9. Lighting component according to claim 1, characterized by a maximum operating brightness in the region of the luminous surface of at least 500 cd/m², preferably at least 1000 cd/m², and particularly preferably at least 5000 cd/m².

10. Lighting component according to claim 1, characterized in that each of the multiple partial electrodes is provided with a layer resistance and a width, resulting in a product of the layer resistance and width having a value between 10 and 1000 mm*ohm/square, preferably between 100 and 1000 mm*ohm/square.

11. Lighting component according to claim 1, characterized in that a light-scattering element is provided so as to planarly overlap with the luminous surface.

12. Lighting component according to claim 11, characterized in that the light-scattering element comprises a light-scattering substrate on which the electrode, counterelectrode, and organic layer system are stacked.

13. Lighting component according to claim 11, characterized in that the light-scattering element comprises a scattering foil.

14. Lighting component according to claim 1, characterized in that the lighting element is designed according to at least one design type selected from the following group of design types:

transparent lighting element, top-emitting lighting element, bottom-emitting lighting element, and a lighting element which emits on both sides.

15. Lighting component according to claim 1, characterized in that the luminous surface has an area of several square centimeters.

16. Lighting component according to claim 1, characterized in that the organic layer system has one or more doped charge carrier transport layers.

17. Lighting component according to claim 1, characterized in that the lighting element (1) is electrically connected in series with at least one additional lighting element (2) having the same design.

18. Lighting component according claim 17, characterized in that the lighting element is electrically connected in series with at least 10 additional lighting elements having the same design, preferably with at least 27 additional lighting elements, and particularly preferably with at least 55 additional lighting elements.

19. Lighting component according to claim 17, characterized in that a distance between adjacently provided edge sections of the counterelectrodes of adjacent lighting elements is greater than the respective width of the multiple partial electrodes preferably greater than three times the respective width of the multiple partial electrodes, and particularly preferably greater than ten times the respective width of the multiple partial electrodes.

20. Use of an organic lighting component according to claim 1 in a device selected from the following group of devices:

lighting unit and display device.