Display devices

• US 10,340,256 B2
• Filed: 05/12/2017
• Issued: 07/02/2019
• Est. Priority Date: 09/14/2016
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Wu, Yuan-Lin, Lee, Kuan-Feng, Chu, Wei-Cheng
• Primary Examiner(s): Crawford, Latanya N
• Application Number:
  US15/593,626
• Publication Number:
  US 20180076182A1
• Time in Patent Office: 781 Days
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2933/0033 relating to semiconductor body packages
• CPC Class Codes: H01L 2933/0058 relating to optical field-shaping elements
• CPC Class Codes: H01L 2933/0066 relating to arrangements for conducting electric current to or from the semiconductor body
• CPC Class Codes: H01L 33/20 with a particular shape, e.g. curved or truncated substrate
• CPC Class Codes: H01L 33/58 Optical field-shaping elements
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

Abstract

A display device is provided. The display device includes a substrate having a surface including a display area and a non-display area adjacent to the display area; a plurality of light-emitting diodes disposed on the display area of the substrate, wherein the light-emitting diode includes a contact electrode; and an anisotropic conductive layer disposed between the substrate and the plurality of light-emitting diodes, wherein the anisotropic conductive layer has a cross-sectional sidewall profile, and at least a part of the cross-sectional sidewall profile of the anisotropic conductive layer is in a shape of curve.

Claims

1. A display device, comprising:

a substrate having a surface comprising a display area and a non-display area adjacent to the display area;

a plurality of light-emitting diodes disposed on the display area of the substrate, wherein the light-emitting diode comprises a contact electrode;

an anisotropic conductive layer disposed between the substrate and the plurality of light-emitting diodes, wherein the anisotropic conductive layer has a cross-sectional sidewall profile, and at least a part of the cross-sectional sidewall profile of the anisotropic conductive layer is in a shape of a curve;

a covering layer contacting at least a portion of one of the plurality of light-emitting diodes, wherein the covering layer has a cross-sectional sidewall profile, and at least a part of the cross-sectional sidewall profile of the covering layer is in a shape of a curve; and

a connection structure disposed on the non-display area and/or the display area of the substrate, wherein the connection structure comprises an electrode having a cross-sectional sidewall profile, and at least a part of the cross-sectional sidewall profile of the electrode is in a shape of a curve.

2. The display device as claimed in claim 1, further comprising an array layer disposed between the anisotropic conductive layer and the substrate.

3. The display device as claimed in claim 1, wherein an angle between the surface of the substrate and the cross-sectional sidewall profile of the anisotropic conductive layer is less than 90 degrees.

4. The display device as claimed in claim 3, wherein the angle is greater than or equal to 30 degrees.

5. The display device as claimed in claim 1, wherein the anisotropic conductive layer comprises a plurality of separated patterns.

6. The display device as claimed in claim 5, wherein the anisotropic conductive layer is black.

7. The display device as claimed in claim 5, further comprising a plurality of black matrices having a height disposed on the substrate and between the separated patterns of the anisotropic conductive layer.

8. The display device as claimed in claim 1, wherein the anisotropic conductive layer comprises a plurality of conductive particles having a surface located between the contact electrodes of the light-emitting diodes and a plurality of bonding pads disposed on the substrate.

9. The display device as claimed in claim 8, wherein the conductive particle has a plurality of protrusions from the surface thereof.

10. The display device as claimed in claim 1, wherein the connection structure comprises an insulating layer which is separated from the light-emitting diodes.

11. The display device as claimed in claim 1, wherein the connection structure comprises an insulating layer which is extended to cover the light-emitting diodes.

12. The display device as claimed in claim 10, wherein the contact electrode covers the insulating layer.

13. The display device as claimed in claim 1, wherein the one of the plurality of light-emitting diodes comprises a first N-type semiconductor layer having a thickness and a first P-type semiconductor layer having a thickness formed on the first N-type semiconductor layer, and the connection structure comprises a second N-type semiconductor layer having a thickness and the electrode having a thickness formed on the second N-type semiconductor layer.

14. The display device as claimed in claim 13, wherein the thickness of the first N-type semiconductor layer of the light-emitting diode is greater than the thickness of the second N-type semiconductor layer of the connection structure.

15. The display device as claimed in claim 13, wherein a ratio between a sum of the thickness of the second N-type semiconductor layer and the thickness of the electrode of the connection structure and a sum of the thickness of the first N-type semiconductor layer and the thickness of the first P-type semiconductor layer of the light-emitting diode is from 0.9 to 1.1.