Transparent display panel

Patent metadata

Field	Value
Publication number	US-11133294-B2
Application number	US-201916539483-A
Country	US
Kind code	B2
Filing date	Aug 13, 2019
Priority date	Aug 15, 2018
Publication date	Sep 28, 2021
Grant date	Sep 28, 2021

Abstract

A transparent display panel with a light-transmitting substrate, a plurality of top-emitting micro light emitting diodes, a plurality of bottom-emitting micro light emitting diodes, and a light shielding layer. The light transmissive substrate has a surface. These top-emitting micro light emitting diodes and these bottom-emitting micro light emitting diodes are disposed on the surface of the light transmissive substrate. The bottom-emitting micro light emitting diodes has an epitaxial structure and a light shielding member, the epitaxial structure has a pair of upper and lower surfaces on the opposite sides, the lower surface faces toward the light transmissive substrate, and the light shielding member is disposed on the upper surface to shield the light emitted by the bottom-emitting micro light emitting diodes towards the upper surface.

First claim

What is claimed is:

1. A transparent display panel comprising:
a light transmissive substrate, with a surface;
a plurality of top-emitting micro light emitting diodes for emitting rays upwards, disposed on the surface of the light transmissive substrate;
a plurality of bottom-emitting micro light emitting diodes for emitting rays downwards, disposed on the surface of the light transmissive substrate, wherein each of the bottom-emitting micro light emitting diodes has an epitaxial structure and a light shielding component, the epitaxial structure has a upper surface and a lower surface, the lower surface faces the light transmissive substrate, and the light shielding component is disposed on the upper surface to shield the light emitted from the bottom-emitting micro light emitting diode towards the upper surface; and
a light shielding layer, disposed on the surface of the light transmissive substrate, wherein a portion of the light shielding layer is disposed between the top-emitting micro light emitting diode and the light transmissive substrate to shield the light emitted from the top-emitting micro light emitting diode towards the direction of the light transmissive substrate,
wherein the transparent display panel further has a plurality of pixels to form an image, the top-emitting micro light emitting diodes and the bottom-emitting micro light emitting diodes are arranged in the pixels.

2. The transparent display panel of claim 1 , wherein an orthographic projection of the light shielding layer on the surface of the light transmissive substrate covers each of the orthographic projections of the top-emitting micro light emitting diodes on the surface of the light transmissive substrate.

3. The transparent display panel of claim 2 , wherein an area of the orthographic projection of the light shielding layer on the surface of the light transmissive substrate is greater than a total area of the orthographic projections of the top-emitting micro light emitting diodes on the surface of the light transmissive substrate.

4. The transparent display panel of claim 1 , wherein an orthographic projection of the light shielding layer on the surface of the light transmissive substrate does not overlap an orthographic projection of any bottom-emitting micro light emitting diode.

5. The transparent display panel of claim 1 , wherein an area of an orthographic projection of bottom-emitting micro light emitting diode on the surface of the light transmissive substrate is greater than a total area of an orthographic projection of the top-emitting micro light emitting diode on the surface of the light transmissive substrate.

6. The transparent display panel of claim 1 , wherein:
the epitaxial structure of each of the bottom-emitting micro light emitting diodes further comprises a I-type semiconductor layer, a light-emitting layer and a II-type semiconductor layer, wherein the light-emitting layer is disposed between the I-type semiconductor layer and the II-type semiconductor layer;
the epitaxial structure of each of the top-emitting micro light emitting diodes further comprises a I-type semiconductor layer, a light-emitting layer and a II-type semiconductor layer, wherein the light-emitting layer is disposed between the I-type semiconductor layer and the II-type semiconductor layer; and
the I-type semiconductor layer of one of the top-emitting micro light emitting diodes is connected to the I-type semiconductor layer of one of the bottom-emitting micro light emitting diodes.

7. The transparent display panel of claim 1 , further comprising a common electrode wire layer disposed on the surface of the light transmissive substrate, wherein:
the epitaxial structure of each of the bottom-emitting micro light emitting diodes further comprises a I-type semiconductor layer, a light-emitting layer and a II-type semiconductor layer, wherein the light-emitting layer is disposed between the I-type semiconductor layer and the II-type semiconductor layer;
the epitaxial structure of each of the top-emitting micro light emitting diodes further comprises a I-type semiconductor layer, a light-emitting layer and a II-type semiconductor layer, wherein the light-emitting layer is disposed between the I-type semiconductor layer and the II-type semiconductor layer; and
the I-type semiconductor layer of the top-micro light emitting diodes and the I-type semiconductor layer of the bottom-emitting micro light emitting diodes are electrically connected to the common electrode wiring layer.

8. The transparent display panel of claim 7 , wherein, the I-type semiconductor layers of the top-emitting micro light emitting diodes are adjacent to the surface of the light transmissive substrate and the common electrode wiring layer, and the I-type semiconductor layers of the bottom-emitting micro light emitting diodes are adjacent to the surface of the light transmissive substrate and the common electrode wiring layer.

9. The transparent display panel of claim 7 , wherein, the I-type semiconductor layers of the top-emitting micro light emitting diodes are adjacent to the surface of the light transmissive substrate, and the II-type semiconductor layers of the bottom-emitting micro light emitting diodes are adjacent to the surface of the light transmissive substrate.

10. The transparent display panel of claim 1 , the plurality of pixels comprising:
a plurality of first pixels, arranged in an array, with each of the first pixels comprising at least two of the top-emitting micro light emitting diodes, wherein the at least two top-emitting micro light emitting diodes are configured to provide different color of light respectively; and
a plurality of second pixels, arranged in an array, with each of the second pixels comprising at least two of the bottom-emitting micro light emitting diodes, wherein the at least two bottom-emitting micro light emitting diodes are configured to provide different color of light respectively;
a pitch of the first pixels arrangement is different from a pitch of the second pixels arrangement.

11. The transparent display panel of claim 10 , wherein the image is a first image shown by the first pixels on one side of the light transmissive substrate, and a second image is shown by the second pixels on another side of the light transmissive substrate.

12. The transparent display panel of claim 11 , wherein the number of the first pixels is different from the number of the second pixels.

13. The transparent display panel of claim 11 , wherein one of the first pixels overlaps one of the second pixels.

14. The transparent display panel of claim 1 , wherein the top-emitting micro light emitting diodes surround one of the bottom-emitting micro light emitting diodes.

15. The transparent display panel of claim 7 , wherein a portion of the common electrode wiring layer is covered by the light shielding layer.

16. The transparent display panel of claim 1 , wherein the epitaxial structure of each of the bottom-emitting micro light emitting diodes further comprises a side wall that is connected to the upper surface and is not parallel to the upper surface, the light shielding component extends from the upper surface and covers at least a portion of the side wall.

17. The transparent display panel of claim 1 , further comprises a lens component and a transparent insulation layer, the transparent insulation layer is disposed on light transmissive substrate, wherein the lens component is disposed on the transparent insulation layer, and a light-concentrating surface of the lens component faces the surface of the light tra

Assignees

• Playnitride Inc

Inventors

• Chen Pei-Hsin
• Shih Yi-Chun
• Chen Yi-Ching
• Liu Ying-Tsang
• Li Yu-Chu

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/857

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title

• H10H20/841

  Reflective coatings, e.g. dielectric Bragg reflectors · CPC title

• H01L33/62

  Electricity · mapped topic