# US 11,910,640 B2 · Display device and manufacturing method thereof

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- Number: US 11,910,640 B2
- Document ID: US11910640B2
- Status: Granted
- Kind: B2
- Application number: 17/391,313
- Filed: 2021-08-02
- Published: 2022-02-03
- Granted: 2024-02-20
- Earliest claimed: 2020-08-03
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Beom Shik Kim; Jae Joong Kwon; Hyun Jin Cho; Jeong Woo Park
- Web page: https://patentgrep.com/patent/US11910640B2

## CPC

- G02B 3/005: {arranged along a single direction only, e.g. lenticular sheets (G02B3/0043 takes precedence)}
- G02B 5/201: {in the form of arrays}
- G02B 5/205: {Neutral density filters}
- G02B 30/27: involving lenticular arrays
- H10K 59/879: {comprising refractive means, e.g. lenses}
- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- H10K 59/12: Active-matrix OLED [AMOLED] displays
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display device includes a display panel, a lens array disposed on a first surface of the display panel and including a plurality of lenses, and an optical filter disposed on the first surface of the display panel. The optical filter includes a plurality of first portions and a plurality of second portions which are alternately arranged in a first direction parallel to the first surface of the display panel. Each of the plurality of first portions has a first transmittance value. Each of the plurality of second portions has a symmetric light transmittance distribution in which a transmittance value increases from the center having a second transmittance value to each of opposite ends having a third transmittance value.

## Claims

### Claim 1

A display device comprising:
a display panel;
a lens array disposed on a first surface of the display panel and including a plurality of lenses; and
an optical filter disposed on the first surface of the display panel,
wherein the optical filter includes a plurality of first portions and a plurality of second portions which are alternately arranged in a first direction parallel to the first surface of the display panel,
wherein each of the plurality of first portions has a first transmittance value, and
wherein each of the plurality of second portions has a symmetric light transmittance distribution in which a transmittance value increases from the center having a second transmittance value to each of opposite ends having a third transmittance value.

### Claim 2 (depends on 1)

The display device of claim 1,
wherein the center of the symmetric light transmittance distribution of each of the plurality of second portions is aligned to a lens boundary between two adjacent lenses of the plurality of lenses in a thickness direction.

### Claim 3 (depends on 2)

The display device of claim 2,
wherein each of the plurality of first portions has a constant transmittance value of the first transmittance value.

### Claim 4 (depends on 3)

The display device of claim 3,
wherein the second transmittance value is smaller than the first transmittance value.

### Claim 5 (depends on 4)

The display device of claim 4,
wherein the second transmittance value is greater than 0 and less than 0.3, and
wherein the third transmittance value is greater than 0.7 and less than 1.0.

### Claim 6 (depends on 4)

The display device of claim 4,
wherein each of the plurality of first portions includes a first end connected to one of two adjacent second portions of the plurality of second portions and a second end connected to the other of the two adjacent second portions of the plurality of second portions, and
wherein the third transmittance value is equal to the first transmittance value.

### Claim 7 (depends on 1)

The display device of claim 1,
wherein the plurality of second portions of the optical filter corresponds to an apodization slit.

### Claim 8 (depends on 1)

The display device of claim 1,
wherein each of the plurality of second portions of the optical filter includes a light blocking material, and
wherein a density of the light blocking material gradually increases from the center to each of the opposite ends.

### Claim 9 (depends on 1)

The display device of claim 1,
wherein the lens array includes a plurality of lens boundary portions and a plurality of non-boundary portions which are alternately arranged in the first direction,
wherein each of the plurality of lens boundary portions includes edge portions of two adjacent lenses of the plurality of lenses,
wherein each of the plurality of non-boundary portions overlaps a corresponding one of the plurality of first portions of the optical filter, and
wherein each of the plurality of boundary portions overlaps a corresponding one of the plurality of second portions of the optical filter.

### Claim 10 (depends on 9)

The display device of claim 9,
wherein each of the plurality of lens boundary portions has a width ranging from 3 μm to 5 μm, and
wherein each of the plurality of lenses has a width ranging from 100 μm to 140 μm.

### Claim 11 (depends on 9)

The display device of claim 9,
wherein each of the plurality of lens boundary portions is configured to diffract light which is received from the display panel.

### Claim 12 (depends on 1)

The display device of claim 1,
wherein the lens array is a lenticular lens.

### Claim 13 (depends on 12)

The display device of claim 12,
wherein when the display device is viewed in a plan view, the plurality of second portions of the optical filter are arranged to have a stripe shape which extends in a second direction different from the first direction.

### Claim 14 (depends on 13)

The display device of claim 13,
wherein the display panel includes a plurality of sub-pixels which are arranged in the first direction and a third direction different from the first direction,
wherein the third direction is different from the second direction, and
wherein the first direction, the second direction, and the third direction are on the same plane which is parallel to the first surface of the display panel.

### Claim 15 (depends on 1)

The display device of claim 1,
wherein the plurality of lenses are arranged in a matrix fashion to form a micro-lens array.

### Claim 16 (depends on 15)

The display device of claim 15,
wherein when the display device is viewed in a plan view, each of the plurality of lenses has a hexagonal shape, and
wherein when the display device is viewed in a plan view, the plurality of second portions of the optical filter are arranged in a hexagonal grid shape.

### Claim 17 (depends on 1)

The display device of claim 1,
wherein the optical filter is interposed between the display panel and the lens array.

### Claim 18 (depends on 1)

The display device of claim 1,
wherein the lens array is interposed between the display panel and the optical filter.

### Claim 19 (depends on 1)

The display device of claim 1,
wherein the display panel includes a plurality of color filters and a plurality of black matrixes which are alternately arranged in the first direction, and
wherein each of the plurality of second portions of the optical filter overlaps a corresponding one of the plurality of black matrixes.

### Claim 20 (depends on 19)

The display device of claim 19,
wherein the plurality of black matrixes includes a plurality of first black matrixes and a plurality of second black matrixes,
wherein each of the plurality of first black matrixes overlaps a corresponding one of the plurality of second portions of the optical filter, and
wherein each of the plurality of second black matrixes overlaps a corresponding one of the plurality of first portions of the optical filter.

### Claim 21

A display device comprising:
a display panel;
a lens array disposed on a first surface of the display panel and including a plurality of lenses; and
an optical filter disposed on the first surface of the display panel and including a light blocking area overlapping a first lens boundary between two adjacent lenses of the plurality of lenses in a thickness direction, a light transmitting area disposed between the first lens boundary and a second lens boundary adjacent to the first lens boundary, and a gradient area disposed between the light blocking area and the light transmitting area,
wherein the gradient area of the optical filter has a light transmittance value which varies according to a distance from the first lens boundary toward the second lens boundary.

### Claim 22 (depends on 21)

The display device of claim 21,
wherein the gradient area has a minimum light transmittance value at one side adjacent to the light blocking area and a maximum light transmittance value at the other side adjacent to the light transmitting area.