Light-emitting electronic component

• US 7,278,760 B2
• Filed: 05/24/2004
• Issued: 10/09/2007
• Est. Priority Date: 05/24/2004
• Status: Active Grant

• Current Assignee: Pictiva Displays International Limited (f/k/a Dolya Holdco 5 Limited) (Key Patent Innovations Limited)
• Original Assignee: Osram Opto Semiconductors GmbH (Ams-Osram AG)
• Inventors: Heuser, Karsten, Diekmann, Karsten
• Primary Examiner(s): O'Shea; Sandra
• Assistant Examiner(s): Truong; Bao Q.
• Application Number:
  US10/853,570
• Publication Number:
  US 20050259423A1
• Time in Patent Office: 1,233 Days
• Field of Search: 362/293, 362/2, 362/583, 362/510, 362/84, 362/330, 313/463, 313/112, 313/580, 313/498, 313/501, 313/506, 359/502, 359/578, 359/588, 359/590, 349/18
• US Class Current: 362/293
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/12044 OLED
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light

Abstract

A light-emitting electronic component is described that includes at least one light-emitting element intended for the emission of light with a predetermined spectral distribution, at least one filter element arranged in a beam path of the light with the predetermined spectral distribution, the transmission property of the filter element with respect to the light with the predetermined spectral distribution determining the spectral distribution of the light emitted by the light-emitting component, with the transmission property of the filter element being tunable during operation of the light-emitting electronic component. The color of the light emitted by the component can be tuned by tuning the transmission property of the filter element.

Claims

1. A light-emitting electronic component, comprising:

a light-emitting element including a light emitting layer connected to and disposed between a first electrode and a second electrode for emitting light with a predetermined first spectral distribution; and

a filter element including a filter layer connected to and disposed between a first electrically conductive contact layer and a second electrically conductive contact layer, and arranged in a beam path of the light,

wherein the filter layer is operable to cause the light transmitted therethrough to have a second spectral distribution,

wherein the filter element is tunable during operation of the light-emitting element, such that the second spectral distribution of the light passing through the filter element changes as the filter element is tuned, and

wherein the light emitting layer, the first electrode, the second electrode, the filter layer, the first electrically conductive contact layer and the second electrically conductive contact layer form a multi-layer stacked structure.

2. The component according to claim 1, wherein a color of the light transmitted by the filter element is tunable by means of tuning the filter element.

3. The component according to claim 1, wherein the light-emitting element includes at least one opto-electronic element.

4. The component according to claim 1, wherein the light-emitting element includes at least one organic light emitting material.

5. The component according to claim 1, wherein the light-emitting element includes an organic light emitting diode structure.

6. The component according to claim 1, wherein the filter element is electrically tunable.

7. The component according to claim 1, wherein the filter element contains at least one electrochromic material.

8. The component according to claim 7, wherein the electrochromic material contains at least one inorganic material.

9. The component according to claim 8, wherein the inorganic material is a tungsten oxide.

10. The component according to claim 7, wherein the electrochromic material contains at least one organic material.

11. The component according to claim 1, wherein the light-emitting element and the filter element are integrated in a common layer stack.

12. The component according to claim 1, wherein the light-emitting element and the filter element are arranged in a common housing.

13. The component according to claim 1, wherein the light-emitting element and the filter element are independently actuatable from one another.

14. The component according to claim 1, wherein the light-emitting element and the filter element are commonly actuatable.

19. The component according to claim 13, wherein the light-emitting element and the at least one filter element are independently actuatable during operation.

20. The component according to claim 14, wherein the light-emitting element and the at least one filter element are commonly actuatable during operation.

21. The component according to claim 13, wherein the light emitting layer is an organic-layered stack including a hole transport layer.

22. The component according to claim 13, wherein the light emitting layer, the first electrode and the second electrode are arranged on a window operable to allow light having the first spectral distribution to be transmitted to the filter element.

23. The component according to claim 22, wherein the filter layer, the first contact layer and the second contact layer are positioned on a carrier to mechanically stabilize the light emitting element arranged on the window.

24. The component according to claim 1, wherein at least one of the first electrode and the second electrode includes transparent material.

25. The component according to claim 1, wherein the filter element consists essentially of the filter layer.

26. The component according to claim 1, further comprising a window positioned between the first electrode and the first contact layer, wherein the window is operable to allow light emitted with the first spectral distribution to be transmitted therethrough.

27. The component according to claim 1, further comprising a window positioned adjacent to the second contact layer, wherein the window is operable to allow light emitted with the second spectral distribution to be transmitted therethrough.

28. The component according to claim 11, wherein the common layer stack is disposed on a common carrier.

29. The component according to claim 1, wherein a voltage is applied to the filter layer through the first electrically conductive contact layer and the second electrically conductive contact layer.

30. The component according to claim 1, wherein the first electrode and the first electrically conductive contact layer are a common electrode.

15. A method for forming a light-emitting electronic component, comprising:

forming at least one light-emitting element including a light emitting layer connected to and disposed between a first electrode and a second electrode for emitting light with a predetermined first spectral distribution on a substrate; and

forming at least one filter element including a filter layer connected to and disposed between a first electrically conductive contact layer and a second electrically conductive contact layer such that the at least one filter element is in a beam path of the light emitted from the at least one light-emitting element, the at least one filter element causing light transmitted by the at least one filter element to have a different, second spectral distribution,

wherein the filter element is tunable during operation of the light-emitting element, such that the second spectral distribution of the light passing through the filter element changes as the filter element is tuned, and

wherein the light emitting layer, the first electrode, the second electrode, the filter layer, the first electrically conductive contact layer and the second electrically conductive contact layer form a multi-layer stacked structure.

16. The method of claim 15, wherein:

forming the at least one light-emitting element includes forming the at least one light-emitting element on a first surface of the substrate; and

forming the at least one filter element includes forming the at least one filter element on a second surface of the substrate.

17. The method of claim 15, wherein forming the at least one filter element includes forming the at least one filter element on the at least one light-emitting element.

18. The method of claim 15, further comprising conductively coupling the at least one filter element to a voltage source, wherein the voltage source is capable of applying two or more different voltages to the at least one filter element.