DISPLAY PANEL OF MICRO LIGHT EMITTING DIODE

• US 20190325803A1
• Filed: 04/18/2019
• Published: 10/24/2019
• Est. Priority Date: 04/18/2018
• Status: Active Grant

• Current Assignee: PlayNitride Display Co., Ltd.
• Original Assignee: PlayNitride Inc.
• Inventors: CHEN, Pei-Hsin, CHEN, Yi-Ching, SHIH, Yi-Chun, LI, Yu-Chu, LIU, Ying-Tsang
• Granted Patent: US 10,832,610 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/2088 with use of a plurality of processors, each processor controlling a number of individual elements of the matrix
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin

Abstract

A display panel of micro light emitting diode comprises a substrate, a plurality of micro light emitting diodes, a plurality of driving chips and a shading layer. The substrate having a first surface and a display area. The plurality of micro light emitting diodes is disposed on the first surface of the substrate and is located in the display area, with each of the micro light emitting diodes having a light emitting surface while the light emitting surface is away from the first surface of the substrate. The plurality of driving chips is disposed on the first surface of the substrate and is located in the display area, with each driving chip electrically connecting to at least one of the micro light emitting diodes. The shading layer is disposed on the first surface of the substrate and covering the driving chips while exposing the light emitting surfaces.

Claims

1. A display panel of micro light emitting diode, comprising:

a substrate having a first surface and a display area;

a plurality of micro light emitting diodes disposed on the first surface of the substrate and located in the display area, wherein each of the micro light emitting diodes has a bottom surface and a light emitting surface located at two opposite sides of the corresponding micro light emitting diode respectively, wherein the bottom surface of the micro light emitting diode is close to the first surface of the substrate while the light emitting surface is away from the first surface of the substrate;

a plurality of driving chips disposed on the first surface of the substrate and located in the display area and separated from the micro light emitting diodes, wherein each of the driving chips electrically connects to at least one of the micro light emitting diodes; and

a shading layer disposed on the first surface of the substrate and covering the driving chips, wherein the light emitting surfaces of the micro light emitting diodes are exposed by the shading layer, wherein a thickness of the micro light emitting diode is less than half of a thickness of the driving chip.

2. The display panel of micro light emitting diode according to claim 1, further comprising a display driving circuit on the substrate, electrically connected to the micro light emitting diodes and the driving chips, wherein the shading layer has a plurality of openings and the micro light emitting diodes are in the openings.

3. The display panel of micro light emitting diode according to claim 2, wherein the shading layer has a second surface, and a distance between the second surface of the shading layer and the first surface of the substrate is larger than a distance between the first surface of the substrate and any one of the light emitting surfaces.

4. The display panel of micro light emitting diode according to claim 1, wherein the shading layer has a plurality of dented parts and a plurality of protuberance parts, and the micro light emitting diodes are disposed in the dented parts and the driving chips are disposed in the protuberance parts, and a distance between the first surface of the substrate and a surface of any one of the dented parts is less than another distance between the first surface of the substrate and the light emitting surface of any one of the micro light emitting diodes, and further another distance between a surface of any one of the protuberance parts and the first surface of the substrate is larger than the other distance between the first surface of the substrate and the light emitting surface of any one of the micro light emitting diodes.

5. The display panel of micro light emitting diode according to claim 1, wherein one of the driving chips has a first top surface, and a distance between the first top surface and the first surface of the substrate is larger than a distance between the first surface of the substrate and the light emitting surface.

6. The display panel of micro light emitting diode according to claim 1, further comprising a sensing component disposed on the substrate, located in the display area of the substrate, and covered by the shading layer.

7. The display panel of micro light emitting diode according to claim 1, further comprising a sensing component disposed on the substrate and located in the display area of the substrate, wherein a second top surface of the sensing component is exposed by the shading layer.

8. The display panel of micro light emitting diode according to claim 7, wherein the shading layer includes a plurality of dented parts and a plurality of protuberance parts, and the micro light emitting diodes and the sensing component are disposed in the dented parts and the driving chips are disposed in the protuberance parts, wherein a distance between a surface of any one of the dented parts and the first surface of the substrate is less than a distance between the first surface of the substrate and the light emitting surface of any one of the micro light emitting diodes, and a distance between a surface of any one of the dented parts and the first surface of the substrate is less than a distance between the first surface of the substrate and the second top surface of any one of the sensing components, and a distance between a surface of any one of the protuberance parts and the first surface of the substrate is larger than a distance between the first surface of the substrate and the light emitting surface of any one of the micro light emitting diodes.

9. The display panel of micro light emitting diode according to claim 1, further comprising a plurality of touch components disposed on the substrate and in the display area, wherein the shading layer covers the touch components.

10. The micro light emitting diode according to claim 1, wherein the micro light emitting diodes comprises a plurality of red micro light emitting diodes, a plurality of green micro light emitting diodes and a plurality of blue micro light emitting diodes, and a distance between the first surface of the substrate and the light emitting surface of any one of the red micro light emitting diodes, a distance between the first surface of the substrate and the light emitting surface of the green micro light emitting diodes and a distance between the first surface of the substrate and the light emitting surface of the blue micro light emitting diodes are different.

11. The display panel of micro light emitting diode according to claim 10, further comprising a plurality of pixels, wherein each of the plurality of pixels includes at least one red micro light emitting diode, at least one green micro light emitting diode and at least one blue micro light emitting diode.

12. The display panel of micro light emitting diode according to claim 1, wherein the shading layer has a second surface, and a distance between the second surface of the shading layer and the first surface of the substrate is larger than a distance between the first surface of the substrate and a first top surface of any one of the driving chips, and a distance between the second surface of the shading layer and the first surface of the substrate is less than a distance between the first surface of the substrate and the light emitting surface of any one of the micro light emitting diodes.