# US 12,113,151 B2 · Unit pixel having light emitting device and displaying apparatus

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- Number: US 12,113,151 B2
- Document ID: US12113151B2
- Status: Granted
- Kind: B2
- Application number: 18/535,178
- Filed: 2023-12-11
- Published: 2024-05-09
- Granted: 2024-10-08
- Earliest claimed: 2020-02-11
- Assignees: Seoul Viosys Co., Ltd.
- Applicants: Seoul Viosys Co., Ltd.
- Inventors: Namgoo Cha; Sangmin Kim; Jung Hwan Ahn; Jae Hee Lim
- Web page: https://patentgrep.com/patent/US12113151B2

## CPC

- H10H 29/855: Optical field-shaping means, e.g. lenses
- H10P 72/74: {using temporarily an auxiliary support}
- H10H 20/855: Optical field-shaping means, e.g. lenses
- H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout}
- H10H 29/34: characterised by the geometry or arrangement of subpixels within a pixel, e.g. relative disposition of the RGB subpixels
- H10H 29/39: Connection of the pixel electrodes to the driving transistors
- H10H 29/8508: {Package substrates, e.g. submounts}
- H10H 20/82: Roughened surfaces, e.g. at the interface between epitaxial layers
- H10H 29/02: using pick-and-place processes
- H10H 29/882: {Scattering means}
- H10P 72/7414: {the auxiliary support including means facilitating the selective separation of some of a plurality of devices from the auxiliary support}
- H10P 72/7434: {used in a transfer process involving at least two transfer steps, i.e. including an intermediate handle substrate}
- H10P 72/7436: {used to support a device or a wafer when forming electrical connections thereto}
- H10P 72/7438: {with parts of the auxiliary support remaining in the finished device}
- H10P 72/744: {Details of chemical or physical process used for separating the auxiliary support from a device or a wafer}
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10

## Abstract

A unit pixel includes a transparent substrate, a plurality of light emitting devices arranged on the transparent substrate, and an optical layer disposed between the light emitting devices and the transparent substrate and transmitting light emitted from the light emitting devices. The transparent substrate has a concavo-convex pattern on a surface facing the light emitting devices.

## Claims

### Claim 1

A light device, comprising:
a substrate;
two or more light emitting devices disposed on the substrate, each of the two or more light emitting devices comprising a semiconductor layer;
an adhesive layer disposed between a light emitting device and the substrate;
a step adjustment layer covering a region of the light emitting device and comprising a region overlapping the adhesive layer; and
a light block layer disposed on the substrate and configured to provide at least one light path,
wherein the at least one light path includes a concave-convex patterned region disposed between the substrate and the semiconductor layer, and
wherein the at least one light path includes a region comprising a width greater than a width of the light emitting device.

### Claim 2 (depends on 1)

The light device of claim 1, wherein the light emitting device further comprises a first electrode pad and a second electrode pad.

### Claim 3 (depends on 2)

The light device of claim 2, wherein the step adjustment layer comprises an open region exposing the first electrode pad.

### Claim 4 (depends on 1)

The light device of claim 1, wherein the step adjustment layer includes a region comprising a width smaller than a width of the adhesive layer.

### Claim 5 (depends on 1)

The light device of claim 1, wherein the step adjustment layer partially exposes an edge of the adhesive layer.

### Claim 6 (depends on 1)

The light device of claim 1, further comprising a cover layer covering a region of the substrate and a region of the semiconductor layer.

### Claim 7 (depends on 6)

The light device of claim 6, wherein the cover layer covers a region of the adhesive layer.

### Claim 8 (depends on 1)

The light device of claim 1, wherein the two or more light emitting devices comprise at least two of a blue light emitter, a green light emitter or a red light emitter.

### Claim 9

A display apparatus, comprising
a panel substrate; and
a light module comprising a light source;
wherein the light source comprising:
a substrate;
two or more light emitting devices disposed on the substrate, each of the two or more light emitting devices comprising a semiconductor layer;
an adhesive layer disposed between a light emitting device and the substrate;
a step adjustment layer covering a region of the semiconductor layer and comprising a region overlapping the adhesive layer; and
a light blocking layer disposed on the substrate and configured to provide at least one light path,
wherein the at least one light path includes a concave-convex patterned region disposed on the substrate, and
wherein the at least one light path comprises a region comprising a width greater than a width of the light emitting device.

### Claim 10 (depends on 9)

The display apparatus of claim 9, wherein the light emitting device further comprises a first electrode pad and a second electrode pad.

### Claim 11 (depends on 10)

The display apparatus of claim 10, wherein the step adjustment layer comprises an open region exposing the first electrode pad.

### Claim 12 (depends on 9)

The display apparatus of claim 9, wherein the step adjustment layer includes a region comprising a width smaller than a width of the adhesive layer.

### Claim 13 (depends on 9)

The display apparatus of claim 9, wherein the step adjustment layer partially exposes an edge of the adhesive layer.

### Claim 14 (depends on 9)

The display apparatus of claim 9, further comprising a cover layer covering a region of the substrate and a region of the semiconductor layer.

### Claim 15 (depends on 14)

The display apparatus of claim 14, wherein the cover layer covers a region of the adhesive layer.

### Claim 16

A light device, comprising:
a substrate;
two or more light emitting devices disposed on the substrate, each of the two or more light emitting devices comprising a semiconductor layer;
an adhesive layer disposed between a light emitting device and the substrate;
a step adjustment layer covering a region of the light emitting device and comprising a region overlapping the adhesive layer; and
a light block layer disposed on the substrate and configured to provide at least one light path,
wherein the at least one light path includes a concave-convex patterned region disposed on the substrate, and
wherein the at least one light path further comprises a cover layer covering the concave-convex patterned region and the semiconductor layer.

### Claim 17 (depends on 16)

The light device of claim 16, wherein the step adjustment layer includes a region comprising a width smaller than a width of the adhesive layer.

### Claim 18 (depends on 16)

The light device of claim 16, wherein the step adjustment layer partially exposes an edge of the adhesive layer.

### Claim 19 (depends on 18)

The light device of claim 18, wherein the cover layer covers the edge of the adhesive layer.

### Claim 20 (depends on 16)

The light device of claim 16, wherein the light emitting device further comprises a first electrode pad and a second electrode pad, and wherein the step adjustment layer comprises an open region exposing the first electrode pad.