LED display apparatus including partition and gap-fill layer

Patent metadata

Field	Value
Publication number	US-12224305-B2
Application number	US-202117162590-A
Country	US
Kind code	B2
Filing date	Jan 29, 2021
Priority date	May 21, 2020
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

A display device includes a circuit substrate including a driving circuit; an LED cell array disposed on the circuit substrate, and including a plurality of LED modules, each of the plurality of LED modules including at least two LED cells, from among a plurality of LED cells of the LED cell array, and an insulator coupling the at least two LED cells to each other; a gap-fill layer filling a gap between the plurality of LED modules; a partition disposed on the LED cell array, and defining a plurality of light emitting windows disposed in regions corresponding to the plurality of LED cells, respectively; and at least one color conversion layer disposed in at least a portion of the plurality of light emitting windows.

First claim

What is claimed is:

1. A display device, comprising:
a circuit substrate including a driving circuit;
an LED cell array disposed on the circuit substrate, and including a plurality of LED modules, each of the plurality of LED modules including at least two LED cells, from among a plurality of LED cells of the LED cell array, and an insulator coupling the at least two LED cells to each other;
a gap-fill layer filling a gap between the plurality of LED modules and not disposed between the at least two LED cells of each of the plurality of LED modules;
a partition disposed on the LED cell array, and defining a plurality of light emitting windows disposed in regions corresponding to the plurality of LED cells, respectively; and
at least one color conversion layer disposed in at least a portion of the plurality of light emitting windows,
wherein each LED cell of the plurality of LED cells includes an active layer, a first conductivity-type semiconductor layer on a first side of the active layer of the LED cell that is towards the partition, and a second conductivity-type semiconductor layer that is on a second side of the active layer of the LED cell that is towards the circuit substrate,
wherein each LED cell of the plurality of LED cells further includes a first electrode and a second electrode that are configured to connect the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer, respectively, to the driving circuit,
wherein each LED cell of the plurality of LED cells comprises a semiconductor stack that comprises the active layer, the first conductivity-type semiconductor layer, and the second conductivity-type semiconductor layer,
wherein a side portion of a top surface of the semiconductor stack is in direct contact with a bottom surface of the partition,
wherein a center portion of the top surface of the semiconductor stack is exposed from the partition such that the center portion directly faces towards a light emitting window from among the plurality of light emitting windows, without the partition being between the center portion and the light emitting window,
wherein a distance, between the plurality of light emitting windows disposed in each of the plurality of LED modules, is the same as a distance between adjacent ones of the plurality of light emitting windows that are from adjacent LED modules from among the plurality of LED modules,
wherein a first portion of the gap-fill layer disposed between the adjacent LED modules from among the plurality of LED modules has a first width that is different from a second width of a second portion of the gap-fill layer disposed between other adjacent LED modules from among the plurality of LED modules, and
wherein the first width and the second width are measured at a same vertical level of the display device.

2. The display device of claim 1 , wherein a first imaginary vertical line passing through a center of a region between adjacent LED cells from among the at least two LED cells of one of the plurality of LED modules is offset, in a horizontal direction, from a second imaginary vertical line passing through a center of a portion of the partition disposed on the region between the adjacent LED cells in the one of the plurality of LED modules.

3. The display device of claim 1 , wherein
the partition includes a plurality of partitions, partitions of the plurality of partitions include a same single crystal and are each provided to a respective one of the plurality of LED modules such as to define light emitting windows, from among the plurality of light emitting windows, that correspond to the at least two LED cells of the respective one of the plurality of LED modules, and
a width of an outer portion of each of the plurality of partitions is less than a width of an inner portion thereof.

4. The display device of claim 3 , wherein the gap-fill layer extends to a space between the plurality of partitions.

5. The display device of claim 3 , wherein the gap-fill layer includes a light blocking material or a light reflective material.

6. The display device of claim 1 , wherein the partition includes a light blocking material or a light reflective material.

7. The display device of claim 6 , wherein the partition includes a same material as a material of the gap-fill layer.

8. The display device of claim 6 , wherein the partition is configured to have a single structure that is disposed over the plurality of LED modules.

9. The display device of claim 6 , wherein the partition includes a plurality of partitions, partitions of the plurality of partitions are each provided to a respective one of the plurality of LED modules such as to define light emitting windows, from among the plurality of light emitting windows, that correspond to the at least two LED cells of the respective one of the plurality of LED modules.

10. The display device of claim 9 , wherein a width of an outer portion of each of the plurality of partitions is less than a width of an inner portion thereof.

11. The display device of claim 9 , wherein the gap-fill layer extends to a space between the plurality of partitions.

12. The display device of claim 1 , further comprising:
a light blocking pattern disposed on the partition, and having a plurality of openings that expose the plurality of light emitting windows, respectively.

13. The display device of claim 12 , wherein a width of the light blocking pattern is greater than a width of a wall of the partition that is overlapped by the light blocking pattern.

14. The display device of claim 12 , wherein
the partition includes a plurality of partitions, partitions of the plurality of partitions are each provided to a respective one of the plurality of LED modules such as to define light emitting windows, from among the plurality of light emitting windows, that correspond to the at least two LED cells of the respective one of the plurality of LED modules, and
the gap-fill layer includes a portion that extends to a space between the plurality of partitions, and the light blocking pattern is connected to the portion of the gap-fill layer.

15. The display device of claim 12 , wherein the light blocking pattern is connected to the partition.

16. The display device of claim 1 , wherein
the LED cell array includes a plurality of circuits disposed between the plurality of LED modules and the circuit substrate,
each of the plurality of circuits includes a transistor, and
the gap-fill layer extends to a region between the plurality of circuits.

17. The display device of claim 1 , wherein the gap-fill layer extends to a level below the partition.

18. A display device, comprising:
a circuit substrate;
an LED cell array disposed on the circuit substrate, and including a plurality of LED modules that each include a plurality of LED cells, where the plurality of LED cells are provided as a plurality of sub-pixels included in each of a plurality of pixels;
a plurality of partitions disposed on the plurality of LED modules, respectively, each partition from among the plurality of partitions defining a plurality of light emitting windows disposed in regions corresponding to the plurality of LED cells of a respective one of the plurality of LED modules;
a gap-fill layer filling a gap that is between the plurality of LED modules and between the plurality of partitions, the gap-fill layer not disposed between the plurality of LED cells of each of the plurality of LED modules;
at least one color conversion layer disposed in at least a portion of the

Assignees

• Samsung Electronics Co Ltd

Inventors

• Yeon Jihye
• Seong Hankyu
• Sim Sunghyun
• Youn Junbu

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10H20/855

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

• H10H20/852

  Encapsulations · CPC title

• H10H20/851

  Wavelength conversion means · CPC title