Display Device

• US 20180322825A1
• Filed: 07/12/2018
• Published: 11/08/2018
• Est. Priority Date: 04/07/2011
• Status: Active Grant

• Current Assignee: OSRAM OLED GMBH (Ams-Osram AG)
• Original Assignee: Osram Opto Semiconductors GmbH (Ams-Osram AG)
• Inventors: Illek, Stefan, von Malm, Norwin, Ruegheimer, Tilman
• Granted Patent: US 10,490,121 B2
• Time in Patent Office: Days
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other

Abstract

A display device is disclosed. In an embodiment a display device includes at least one connection carrier comprising a multiplicity of switches and a multiplicity of light-emitting diode chips, wherein each light-emitting diode chip is mechanically fixed and electrically connected to the connection carrier, wherein each switch is designed for driving at least one light-emitting diode chip, and wherein the light-emitting diode chips are imaging elements of the display device.

Claims

1. A display device comprising:

at least one connection carrier comprising a multiplicity of switches; and

a multiplicity of light-emitting diode chips,

wherein each light-emitting diode chip is mechanically fixed and electrically connected to the connection carrier,

wherein each switch is designed for driving at least one light-emitting diode chip, and

wherein the light-emitting diode chips are imaging elements of the display device.

2. The display device according to claim 1, wherein the connection carrier, the switches and the light-emitting diode chips are proximate to each other.

3. The display device according to claim 1, wherein the connection carrier, the switches and the light-emitting diode chips form of a panel.

4. The display device according to claim 1, further comprising a contact layer, wherein the contact layer electrically conductively connects at least two of the light-emitting diode chips to one another.

5. The display device according to the claim 4,

wherein the contact layer is embodied in a radiation-transmissive fashion at least in places, and

wherein the contact layer covers at least in places radiation passage areas of the light-emitting diode chips electrically conductively connected to one another by the contact layer.

6. The display device according to claim 5, wherein the radiation passage areas are formed at a side of the light-emitting diode chips which faces away from the connection carrier.

7. The display device according to claim 4,

wherein the contact layer is embodied in a radiation-transmissive fashion at least in places, and

wherein the contact layer is formed at least in places with a material that is reflective to electromagnetic radiation generated by the light-emitting diode chips during operation.

8. The display device according to claim 4, wherein the contact layer comprises, in places, a transparent conductive oxide.

9. The display device according to claim 4, wherein the contact layer comprises, in places, a reflective metal.

10. The display device according to claim 4, wherein the contact layer comprises, in places, silver or aluminum.

11. The display device according to claim 1, further comprising an optical body disposed downstream of at least a portion of the light-emitting diode chips, wherein electromagnetic radiation generated by the light-emitting diode chips during operation at least partly passes through the optical body, and wherein the electromagnetic radiation is optically expanded upon passing through the optical body.

12. The display device according claim 11, wherein the optical body comprises radiation-non-transmissive separating structures optically separating adjacent pixels from one another.

13. The display device according to claim 11, wherein the optical body comprises scattering structures for scattering the electromagnetic radiation when passing through, and wherein the scattering structures are formed by diffusely reflective regions.

14. The display device according to claim 12, wherein the separating structures extend from a side of the main body of the optical body which faces the light-emitting diode chips in a direction of a side of the main body which faces away from the light-emitting diode chips, and do not completely penetrate through the main body.

15. The display device according to claim 11, wherein the contact layer at least in places directly adjoins the light-emitting diode chips which it electrically conductively connects to one another, and the optical body.

16. The display device according to claim 1, wherein the switches are integrated into the connection carrier.

17. The display device according to claim 1, wherein a p-type side and an n-type side of each of the light-emitting diode chips are contact-connected from the side of the connection carrier, wherein the light-emitting diode chip comprises an n-conducting region, a p-conducting region and an active region configured to generate radiation, the active region being arranged between the two regions, and wherein the p-conducting region is contact-connected via at least one plated-through hole in the n-conducting region.

18. The display device according to claim 1, wherein the switches are in direct contact with a main body of the connection carrier.

19. The display device according to claim 1, wherein each switch is in direct contact with at least one of the light-emitting diode chips.