# US 2022/0035207 A1 · Array substrate, display panel and display device

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- Number: US 2022/0035207 A1
- Document ID: US20220035207A1
- Status: Published application
- Kind: A1
- Application number: 17/274,928
- Filed: 2020-07-29
- Published: 2022-02-03
- Earliest claimed: 2019-07-31
- Assignees: Boe Technology Group Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.
- Inventors: Xiandong MENG; Jifeng TAN; Wei WANG; Qiuyu LING; Xiaochuan CHEN
- Web page: https://patentgrep.com/patent/US20220035207A1

## CPC

- G02F 1/134309: {characterised by their geometrical arrangement}
- G02F 1/134345: {Subdivided pixels, e.g. for grey scale or redundancy}
- G02B 6/0031: {Reflecting element, sheet or layer}
- G02B 6/0038: {Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide}
- G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)}
- G02F 2201/305: diffraction grating
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A display panel includes: a first substrate and a second substrate; a liquid crystal layer located between the first substrate and the second substrate; located on a side of the first substrate proximate to the liquid crystal layer; and a light-shielding pattern located on a side of the second substrate proximate to the liquid crystal layer. The second substrate has a light-shielding region shielded by the light-shielding pattern and light-exiting regions not shielded by the light-shielding pattern. A pixel electrode in the pixel electrodes is configured to converge light entering the pixel electrode from the first substrate; and the pixel electrode is used to control a deflection state of a liquid crystal in the liquid crystal layer, so that light passing through the pixel electrode is incident to the light-shielding pattern and/or a corresponding light-exiting region.

## Claims

### Claim 1

A display panel, comprising:
a first substrate and a second substrate;
a liquid crystal layer located between the first substrate and the second substrate;
pixel electrodes located on a side of the first substrate proximate to the liquid crystal layer; and
a light-shielding pattern located on a side of the second substrate proximate to the liquid crystal layer, wherein
the second substrate has a light-shielding region shielded by the light-shielding pattern and light-exiting regions not shielded by the light-shielding pattern;
a pixel electrode in the pixel electrodes is configured to converge light that enters the pixel electrode from the first substrate; and the pixel electrode is used to control a deflection state of a liquid crystal in the liquid crystal layer, so that light passing through the pixel electrode is incident to the light-shielding pattern and/or a corresponding light-exiting region.

### Claim 2 (depends on 1)

The display panel according to claim 1, wherein the display panel has a plurality of sub-pixel units; and the pixel electrodes are located in the plurality of sub-pixel units in one-to-one correspondence;
the pixel electrode includes a plurality of electrode strips arranged in a first direction, and two adjacent electrode strips have a gap therebetween; and
widths of the plurality of electrode strips in the first direction gradually decrease from a center of the pixel electrode to edges of the pixel electrode.

### Claim 3 (depends on 2)

The display panel according to claim 2, wherein gaps of the pixel electrode are gradually widened from the center of the pixel electrode to the edges of the pixel electrode.

### Claim 4 (depends on 2)

The display panel according to claim 2, wherein the pixel electrode has a central axis, the central axis extends in a second direction perpendicular to the first direction; and the pixel electrode is symmetrical about the central axis.

### Claim 5 (depends on 4)

The display panel according to claim 4, wherein centered on the central axis, the pixel electrode sequentially includes a first electrode strip to a z-th electrode strip, and a j-th electrode strip is any one of the first electrode strip to the z-th electrode strip, wherein z is a natural number greater than 1, j is any natural number from 1 to z; a gap between the j-th electrode strip and a (j+1)-th electrode strip is referred to as a j-th gap; a width of the j-th electrode strip is denoted as d(j, 1), and the d(j, 1) meets following conditions:
a width d(1, 1) of the first electrode strip is d(1, 1)=2×r(1, 1);
when j is a natural number greater than 1, the width d(j, 1) of the j-th electrode strip is d(j, 1)=r(j, 1)−r(j−1, 2);
wherein
r
⁡
(
j
,
1
)
=
(
2
⁢
j
)
·
f
·
λ
·
(
1
+
(
2
⁢
j
-
1
)
λ
4
·
f
)
1
/
2
,
⁢
r
⁡
(
j
,
2
)
=
(
2
⁢
j
)
·
f
·
λ
·
(
1
+
j
λ
2
·
f
)
1
/
2
,
wherein r(j, 1) represents a distance from the central axis to a distal end of the j-th electrode strip; r(j, 2) represents a distance from the central axis to a proximal end of the (j+1)-th electrode strip; λ is a wavelength of the light; f=f1×n, and f1 is a distance from a surface of the pixel electrode proximate to the light-shielding pattern to a surface of the light-shielding pattern proximate to the pixel electrode along a thickness direction of the first substrate, and n is a refractive index of the liquid crystal.

### Claim 6 (depends on 5)

The display panel according to claim 5, wherein a width of the j-th gap is denoted as d(j, 2), and the d(j, 2) meets following condition:
the width d(j, 2) of the j-th gap is d(j, 2)=r(j, 2)−r(j, 1).

### Claim 7 (depends on 2)

The display panel according to claim 2, wherein the plurality of electrode strips are equal in height.

### Claim 8 (depends on 7)

The display panel according to claim 7, wherein a height of electrode strips is denoted as h, and h=λ/[2×(n1−n2)];
wherein λ represents a wavelength of the light;
n1 represents a refractive index of the pixel electrode; and
n2 represents a refractive index of a filling medium filled in gaps between electrode strips.

### Claim 9 (depends on 2)

The display panel according to claim 2, wherein the pixel electrode further includes:
a conductive connecting sheet disposed on a side of the electrode strips proximate to the first substrate; the conductive connecting sheet is connected to the plurality of electrode strips in the pixel electrode, and the conductive connecting sheet has a light-transmitting structure.

### Claim 10 (depends on 2)

The display panel according to claim 2, wherein the light-shielding pattern includes first light-shielding portions each located between two adjacent sub-pixel units, and a plurality of second light-shielding portions located in the plurality of sub-pixel units in one-to-one correspondence; and
an orthographic projection of a second light-shielding portion in the second light-shielding portions on the first substrate is located within n outer border of an orthographic projection of a corresponding pixel electrode on the first substrate.

### Claim 11 (depends on 1)

The display panel according to claim 1, wherein the light is monochromatic light.

### Claim 12 (depends on 1)

The display panel according to claim 1, further comprising a common electrode and an insulating layer located between the pixel electrodes and the common electrode.

### Claim 13 (depends on 1)

The display panel according to claim 1, wherein the first substrate is a light guide plate, and the display panel further comprises:
light extraction gratings disposed on a side of the light guide plate proximate to the liquid crystal layer; and the pixel electrodes are located at a side of the light extraction gratings away from the light guide plate.

### Claim 14 (depends on 13)

The display panel according to claim 13, wherein the light extraction gratings are configured to make light in the light guide plate exit to the pixel electrodes in parallel with each other.

### Claim 15 (depends on 13)

The display panel according to claim 13, further comprising:
a planarization layer disposed on a side of the light extraction gratings away from the light guide plate, wherein the planarization layer covers the light extraction gratings and the light guide plate, and a refractive index of the planarization layer is less than a refractive index of the light guide plate.

### Claim 16 (depends on 13)

The display panel according to claim 13, wherein outer borders of orthographic projections of the light extraction gratings on the first substrate are located within outer borders of orthographic projections of the pixel electrodes on the first substrate, respectively.

### Claim 17 (depends on 1)

A display device, comprising a light source and the display panel according to claim 1.

### Claim 18 (depends on 17)

The display device according to claim 17, further comprising:
a reflective lampshade disposed at the light source, the reflective lampshade having a free-form surface reflective layer.

### Claim 19

(canceled)

### Claim 20

An array substrate, comprising:
a first substrate, and
pixel electrodes located on a side of the first substrate; wherein a pixel electrode in the pixel electrodes is configured to converge light that enters the pixel electrode from the first substrate;
the pixel electrode includes a plurality of electrode strips arranged in a first direction, and two adjacent electrode strips have a gap therebetween; and
widths of the plurality of electrode strips in the first direction gradually decrease from a center of the pixel electrode to edges of the pixel electrode.

### Claim 21 (depends on 20)

The array substrate according to claim 20, wherein gaps of the pixel electrode are gradually widened from the center of the pixel electrode to the edges of the pixel electrode.