# US 11,307,453 B2 · Display panel and display device

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- Number: US 11,307,453 B2
- Document ID: US11307453B2
- Status: Granted
- Kind: B2
- Application number: 16/620,034
- Filed: 2019-09-30
- Published: 2022-02-17
- Granted: 2022-04-19
- Earliest claimed: 2019-04-29
- Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd.
- Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd.
- Inventors: Yuan Sun; Chao Wang; Guanghui Liu
- Web page: https://patentgrep.com/patent/US11307453B2

## CPC

- G02F 1/133: Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements (arrangements or circuits for control of liquid crystal elements in a matrix, not structurally associated with these elements G09G3/36)
- G02F 1/133603: {with LEDs}
- G02F 1/133331: {Cover glasses}
- G02F 1/133388: {with constructional differences between the display region and the peripheral region}
- G02F 1/133504: {Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606)}
- G02F 1/133531: {characterised by the arrangement of polariser or analyser axes}
- G02F 1/133605: {including specially adapted reflectors}
- G02F 1/133608: {including particular frames or supporting means}
- G02F 1/1339: Gaskets; Spacers; Sealing of cells
- 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

## Abstract

A display panel and a display device are provided. The display panel includes a display area including a transparent display area and an opaque display area surrounding the transparent display area. In the display area, the display panel also includes a backlight and a liquid crystal display panel. The backlight includes a first through hole corresponding to the transparent display area. The liquid crystal display panel is disposed over the backlight. The liquid crystal display panel includes a driving layer and a liquid crystal layer. The driving layer includes a first driving circuit and a second driving circuit. The liquid crystal layer includes a first liquid crystal region corresponding to the transparent display area and a second liquid crystal region corresponding to the opaque display area. The first driving circuit corresponds to the first liquid crystal region. The second driving circuit corresponds to the second liquid crystal region.

## Claims

### Claim 1

A display panel, comprising: a display area comprising a transparent display area and an opaque display area surrounding the transparent display area, wherein in the display area, the display panel further comprises:
a backlight comprising a first through hole, wherein the first through hole corresponds to the transparent display area; and
a liquid crystal display panel disposed over the backlight, wherein the liquid crystal display panel comprises:
a driving layer comprising a first driving circuit and a second driving circuit; and
a liquid crystal layer disposed on the driving layer, wherein the liquid crystal layer comprises a first liquid crystal region and a second liquid crystal region;
wherein the first liquid crystal region corresponds to the transparent display area;
wherein the second liquid crystal region corresponds to the opaque display area;
wherein the first driving circuit corresponds to the first liquid crystal region and is configured to provide a driving signal for the first liquid crystal region; and
wherein the second driving circuit corresponds to the second liquid crystal region and is configured to provide another driving signal for the second liquid crystal region.

### Claim 2 (depends on 1)

The display panel as claimed in claim 1, wherein the liquid crystal display panel further comprises:
a first light source disposed on a side of the liquid crystal display panel adjacent to the first liquid crystal region; and
the driving layer further comprising a third driving circuit, wherein the third driving circuit corresponds to the first light source and is configured to provide a corresponding driving signal for the first light source.

### Claim 3 (depends on 2)

The display panel as claimed in claim 2, wherein the first light source comprises an organic light-emitting diode light source.

### Claim 4 (depends on 1)

The display panel as claimed in claim 1, wherein the first liquid crystal region is filled with scattering liquid crystal.

### Claim 5 (depends on 1)

The display panel as claimed in claim 1, wherein in the display area, the display panel further comprises a second light source disposed on a side of the backlight adjacent to the second liquid crystal region.

### Claim 6 (depends on 5)

The display panel as claimed in claim 5, wherein the second light source comprises a light-emitting diode light source.

### Claim 7 (depends on 1)

The display panel as claimed in claim 1, wherein in the display area, the display panel further comprises:
a first polarizer disposed between the backlight and the liquid crystal display panel; and
a second polarizer disposed on a side of the liquid crystal display panel away from the first polarizer;
wherein the first polarizer comprises a second through hole corresponding to the transparent display area; and
wherein the second polarizer comprises a third through hole corresponding to the transparent display area.

### Claim 8 (depends on 1)

The display panel as claimed in claim 1, wherein the liquid crystal display panel further comprises:
a first substrate disposed on a side of the driving layer away from the liquid crystal layer;
a second substrate disposed on a side of the liquid crystal layer away from the driving layer; and
a sealant layer disposed on edges of the first substrate and the second substrate;
wherein there is a gap between the sealant layer and the liquid crystal layer, and the first light source is disposed within the gap.

### Claim 9 (depends on 1)

A display device, comprising the display panel according to claim 1.

### Claim 10 (depends on 9)

The display device as claimed in claim 9, further comprising a camera disposed on a side of the display panel adjacent to the backlight and corresponding to the transparent display area.