Micro-LED display panel

Patent metadata

Field	Value
Publication number	US-10964674-B2
Application number	US-201916261985-A
Country	US
Kind code	B2
Filing date	Jan 30, 2019
Priority date	Feb 6, 2018
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

A micro-LED display panel is disclosed. The micro-LED display panel includes: a plurality of unit substrates, each of which is formed with a plurality of electrode pads; a plurality of pixels, each of which includes a first micro-LED chip, a second micro-LED chip, and a third micro-LED chip mounted corresponding to the electrode pads; and a mesh arranged over the plurality of unit substrates. The mesh has pixel spacing portions covering at least some exposed areas of the plurality of unit substrates between the pixels and a plurality of openings accommodating the corresponding pixels. The micro-LED display panel is constructed such that the reflection of external light by the exposed areas of the substrate between the pixels and the exposed areas of the electrode pads disposed on the unit substrates is reduced. This construction improves the contrast characteristics and black characteristics of a display and achieves seamlessness in the micro-LED display panel.

First claim

What is claimed is:

1. A micro-light emitting diode (LED) display panel comprising:
a plurality of unit substrates, each unit substrate of the plurality of unit substrates being separated by a seam between two adjacent unit substrates and formed with a plurality of electrode pads;
a plurality of pixels, each pixel of the plurality of pixels comprising a first micro-LED chip, a second micro-LED chip, and a third micro-LED chip mounted corresponding to respective electrode pads of the plurality of electrode pads; and
a mesh arranged over the plurality of unit substrates,
wherein the mesh comprises:
pixel spacing portions covering at least some exposed areas of the plurality of unit substrates between respective pixels of the plurality of pixels and a plurality of openings accommodating corresponding pixels of the plurality of pixels, and
module spacing portions covering respective upper surfaces of respective adjacent portions of respective adjacent unit substrates of the plurality of unit substrates.

2. The micro-LED display panel according to claim 1 , wherein the pixel spacing portions cover at least some exposed areas of respective electrode pads of the plurality of electrodes between adjacent pixels of the plurality of pixels.

3. The micro-LED display panel according to claim 1 , wherein respective pixel spacing portions are in contact with respective pixels of the plurality of pixels.

4. The micro-LED display panel according to claim 1 , wherein a length of each respective opening of the plurality of openings is larger than a respective length of the corresponding pixels of the plurality of pixels by not more than 20 micrometers and a width of each respective opening of the plurality of openings is larger than a respective width of the corresponding pixels of the plurality of pixels by not more than 20 micrometers.

5. The micro-LED display panel according to claim 1 , wherein respective pixel spacing portions are supported by respective electrode pads of the plurality of electrodes.

6. The micro-LED display panel according to claim 1 , wherein a lower surface of respective pixel spacing portions has an upper end and a lower end divided by a step and the upper end of respective pixel spacing portions in contact with at least some exposed areas of respective electrode pads of the plurality of electrode pads between respective adjacent pixels of the plurality of pixels.

7. The micro-LED display panel according to claim 6 , wherein the lower end of respective pixel spacing portions in contact with an exposed upper surface of respective unit substrates of the plurality of unit substrates between respective adjacent pixels of the plurality of pixels.

8. The micro-LED display panel according to claim 6 , wherein the lower end of respective pixel spacing portions spaced apart from an exposed upper surface of respective unit substrates of the plurality of unit substrates between respective adjacent pixels of the plurality of pixels.

9. The micro-LED display panel according to claim 1 , wherein the first micro-LED chip, the second micro-LED chip, and the third micro-LED chip emit blue light.

10. The micro-LED display panel according to claim 9 , further comprising a first wavelength converting material covering an upper side of the first micro-LED chip and converting a wavelength of light from the first micro-LED chip to produce red light.

11. The micro-LED display panel according to claim 10 , further comprising a second wavelength converting material covering an upper side of the second micro-LED chip and converting a wavelength of light from the second micro-LED chip to produce green light.

12. The micro-LED display panel according to claim 11 , further comprising a translucent material covering an upper side of the third micro-LED chip.

13. The micro-LED display panel according to claim 12 , further comprising a protective film.

14. The micro-LED display panel according to claim 13 , wherein the first wavelength converting material is located between the protective film and the first micro-LED chip.

15. The micro-LED display panel according to claim 13 , wherein the second wavelength converting material is located between the protective film and the second micro-LED chip.

16. The micro-LED display panel according to claim 13 , wherein the translucent material is located between the protective film and the third micro-LED chip.

17. The micro-LED display panel according to claim 1 , wherein the first micro-LED chip and the third micro-LED chip emit blue light and the second micro-LED chip emits green light.

18. The micro-LED display panel according to claim 17 , further comprising a translucent material covering an upper side of the second micro-LED chip and an upper side of the third micro-LED chip.

19. The micro-LED display panel according to claim 1 , wherein the mesh is black in color.

Assignees

• Lumens Co Ltd

Inventors

• Bang Jeongho
• Seo Juok
• Yoo Taekyung

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/8513

  having two or more wavelength conversion materials · CPC title

• H10H20/0364

  of interconnections · CPC title

• H10H20/0363

  of optical field-shaping means · CPC title

• H10H20/0361

  of wavelength conversion means · CPC title