Display apparatus and manufacturing method thereof

• US 10,069,041 B2
• Filed: 06/28/2017
• Issued: 09/04/2018
• Est. Priority Date: 08/05/2016
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Lee, Kuan-Feng, Hung, Ting-Kai, Wu, Yu-Hsien, Chang, Chia-Hsiung
• Primary Examiner(s): Ho, Tu-Tu
• Application Number:
  US15/635,220
• Publication Number:
  US 20180040774A1
• Time in Patent Office: 433 Days
• Field of Search: 257 13
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 2933/0025 relating to coatings
• CPC Class Codes: H01L 33/007 comprising nitride compounds
• CPC Class Codes: H01L 33/06 within the light emitting region, e.g. quantum confinement structure or tunnel barrier
• CPC Class Codes: H01L 33/22 Roughened surfaces, e.g. at the interface between epitaxial layers
• CPC Class Codes: H01L 33/32 containing nitrogen
• CPC Class Codes: H01L 33/46 Reflective coating, e.g. dielectric Bragg reflector
• 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
• CPC Class Codes: H01L 33/647 the elements conducting electric current to or from the semiconductor body

Abstract

A display apparatus is provided. The display apparatus includes a substrate, a transistor, a metal layer, and a light-emitting diode. The transistor is disposed on the substrate. The metal layer is disposed on the transistor and electrically connected to the transistor, wherein a first distance is between the upper surface of the metal layer and the substrate in a direction perpendicular to the substrate. The light-emitting diode is disposed on the metal layer, wherein the light-emitting diode includes a light-emitting diode body and an electrode, the light-emitting diode body is electrically connected to the metal layer via the electrode, the light-emitting diode body has a first surface and a second surface opposite to the first surface, the first surface and the second surface are parallel to the substrate, and in the direction above, a second distance is between the first surface and the second surface, wherein the ratio of the second distance to the first distance is greater than or equal to 0.25 and less than or equal to 6.

Claims

1. A display apparatus, comprising:

a substrate;

a transistor disposed on the substrate;

a metal layer disposed on the transistor and electrically connected to the transistor, wherein a first distance is between an upper surface of the metal layer and the substrate in a direction perpendicular to the substrate; and

a light-emitting diode disposed on the metal layer, wherein the light-emitting diode comprises a light-emitting diode body and an electrode, the light-emitting diode body is electrically connected to the metal layer via the electrode, the light-emitting diode body has a first surface and a second surface opposite to the first surface, the first surface and the second surface are parallel to the substrate, and in the direction, a second distance is between the first surface and the second surface, wherein a ratio of the second distance to the first distance is greater than or equal to 0.25 and less than or equal to 6.

2. The display apparatus of claim 1, wherein the ratio of the second distance to the first distance is greater than or equal to 0.6 and less than or equal to 5.

3. The display apparatus of claim 1, wherein the light-emitting diode further comprises a buffer layer disposed on the light-emitting diode body, wherein a top surface of the buffer layer has a plurality of grooves.

4. The display apparatus of claim 1, wherein the light-emitting diode body comprises:

a first conductivity type semiconductor layer;

an active layer disposed on the first conductivity type semiconductor layer; and

a second conductivity type semiconductor layer disposed on the active layer.

5. The display apparatus of claim 4, wherein the second conductivity type semiconductor layer has the second surface, and the second surface has a plurality of grooves.

6. The display apparatus of claim 1, wherein the light-emitting diode further comprises a reflective structure disposed on a sidewall of the light-emitting diode body.

7. The display apparatus of claim 6, wherein the reflective structure a refractive index comprises:

a first insulating layer; and

a second insulating layer disposed on the first insulating layer, wherein of the first insulating layer is different from a refractive index of the second insulating layer.

8. The display apparatus of claim 6, wherein the reflective structure comprises a reflective metal layer.