Display device

• US 10,021,762 B1
• Filed: 10/26/2017
• Issued: 07/10/2018
• Est. Priority Date: 06/30/2017
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Tsai, Tsung-Han, Lee, Kuan-Feng, Wu, Yu-Hsien, Wu, Yuan-Lin
• Primary Examiner(s): Hines, Anne
• Application Number:
  US15/794,153
• Time in Patent Office: 257 Days
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: H01L 21/02381 Silicon, silicon germanium, germanium
• CPC Class Codes: H01L 2224/04026 Bonding areas specifically adapted for layer connectors
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 27/088 the components being field-effect transistors with insulated gate
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 2924/10253 Silicon [Si]
• CPC Class Codes: H01L 2924/12041 LED
• CPC Class Codes: H01L 2933/0091 Scattering means in or on the semiconductor body or semiconductor body package H01L33/22 takes precedence
• CPC Class Codes: H01L 33/00 Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof H10K50/00 takes precedence; devices consisting of a plurality of semiconductor components formed in or on a common substrate and including semiconductor components having potential barriers, specially adapted for light emission H01L27/15; semiconductor lasers H01S5/00
• CPC Class Codes: H01L 33/22 Roughened surfaces, e.g. at the interface between epitaxial layers
• CPC Class Codes: H01L 33/38 with a particular shape
• 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: H05B 33/22 characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/854 : comprising scattering means
• CPC Class Codes: H10K 59/12 : Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1201 : Manufacture or treatment
• CPC Class Codes: H10K 59/1213 : the pixel elements being TFTs
• CPC Class Codes: H10K 59/124 : Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/179 : Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 71/00 : Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 77/111 : Flexible substrates
• CPC Class Codes: Y02E 10/549 : Organic PV cells

Abstract

A display device is provided. The display device includes a driving circuit disposed on a substrate, a first conductive layer disposed on the driving circuit, at least one of light emitting units disposed on the first conductive layer and electrically connected to the driving circuit, and a second conductive layer disposed on at least one of the light emitting units. The second conductive layer has a first surface corresponding to at least one of the light emitting units and a second surface corresponding to a region outside of the first conductive layer. A roughness of the first surface is greater than a roughness of at least a part of the second surface.

Claims

1. A display device, comprising:

a substrate;

a driving circuit disposed on the substrate;

a first conductive layer disposed on the driving circuit;

at least one of light emitting units disposed on the first conductive layer and electrically connected to the driving circuit; and

a second conductive layer disposed on at least one of the light emitting units;

wherein the second conductive layer has a first surface corresponding to at least one of the light emitting units and a second surface corresponding to a region outside of the first conductive layer; and

wherein a roughness of the first surface is greater than a roughness of at least a part of the second surface.

2. The display device according to claim 1, wherein the roughness of the first surface is greater than or equal to 3 nm and less than or equal to 100 nm.

3. The display device according to claim 1, wherein the first conductive layer has a top surface and a bottom surface, the top surface is opposite to the bottom surface and neighbors at least one of the light emitting units, and a roughness of the top surface is greater than a roughness of at least the part of the second surface.

4. The display device according to claim 1, wherein each of the light emitting units comprises:

a first electrode disposed on the first conductive layer;

a first semiconductor layer disposed on the first electrode;

a second semiconductor layer disposed on the first semiconductor layer; and

a second electrode disposed on the second semiconductor layer.

5. The display device according to claim 4,

wherein the first electrode has a third surface adjacent to the first conductive layer and the second electrode has a fourth surface adjacent to the second conductive layer;

and

wherein a roughness of the fourth surface is greater than a roughness of the third surface.

6. The display device according to claim 4,

wherein the first semiconductor layer has a fifth surface adjacent to the first electrode and the second semiconductor layer has a sixth surface adjacent to the second electrode;

and

wherein a roughness of the sixth surface is greater than a roughness of the fifth surface.

7. The display device according to claim 1, further comprising a first scattering layer disposed on the light emitting units.

8. The display device according to claim 1, further comprising a second scattering layer disposed on the first conductive layer.

9. The display device according to claim 8, wherein the second scattering layer includes scattering particles.

10. A display device, comprising:

a substrate;

a driving circuit disposed on the substrate;

a first conductive layer disposed on the driving circuit; and

at least one of light emitting units disposed on the first conductive layer and electrically connected to the driving circuit, wherein each of the light emitting units comprises a first semiconductor layer disposed on the first conductive layer and a second semiconductor layer disposed on the first semiconductor layer;

wherein the first semiconductor layer has a first surface adjacent to the first conductive layer and the second semiconductor layer has a second surface farthest from the first conductive layer; and

wherein a roughness of the second surface is greater than a roughness of the first surface.

11. The display device according to claim 10,

wherein each of the light emitting units further comprises a first electrode disposed between the first conductive layer and the first semiconductor layer and a second electrode disposed on the second semiconductor layer;

wherein the first electrode has a third surface adjacent to the first conductive layer, and the second electrode has a fourth surface farthest from the first conductive layer; and

wherein a roughness of the fourth surface is greater than a roughness of the third surface.

12. The display device according to claim 10, wherein the first conductive layer has a top surface and a bottom surface, the top surface is opposite to the bottom surface and neighbors at least one of the light emitting units, and a roughness of the top surface is greater than a roughness of the first surface.

13. The display device according to claim 10, further comprising a second conductive layer and a first scattering layer successively disposed on the light emitting units.

14. The display device according to claim 10, further comprising a second scattering layer disposed on the first conductive layer.

15. The display device according to claim 14, wherein the second scattering layer includes scattering particles.

16. A display device, comprising:

a substrate;

a driving circuit disposed on the substrate;

a first conductive layer disposed on the driving circuit; and

at least one of light emitting units disposed on the first conductive layer and electrically connected to the driving circuit, wherein each of the light emitting units comprises a first electrode disposed on the first conductive layer, a first semiconductor layer disposed on the first electrode, a second semiconductor layer disposed on the first semiconductor layer, and a second electrode disposed on the second semiconductor layer;

wherein the first electrode has a first surface adjacent to the first conductive layer and the second electrode has a second surface farthest from the first conductive layer; and

wherein a roughness of the second surface is greater than a roughness of the first surface.

17. The display device according to claim 16, wherein the first conductive layer has a top surface and a bottom surface, the top surface is opposite to the bottom surface and neighbors at least one of the light emitting units, and a roughness of the top surface is greater than a roughness of the first surface.

18. The display device according to claim 16, further comprising a second conductive layer and a first scattering layer successively disposed on the light emitting units.

19. The display device according to claim 16, further comprising a second scattering layer disposed on the first conductive layer.

20. The display device according to claim 19, wherein the second scattering layer includes scattering particles.