Display panel and display apparatus

Patent metadata

Field	Value
Publication number	US-12204208-B2
Application number	US-202218017550-A
Country	US
Kind code	B2
Filing date	Feb 23, 2022
Priority date	Feb 23, 2022
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

The present disclosure provides a display panel, including: a first base substrate; a color conversion layer; a light-emitting device layer; and a liquid crystal layer. The liquid crystal layer includes a first optical path adjustment portion and a second optical path adjustment portion spaced apart from each other. Orthographic projections of the first optical path adjustment portion and a light-emitting device on the first base substrate at least partially overlaps with each other, and orthographic projections of the second optical path adjustment portion and the light-emitting device on the first base substrate are spaced apart from each other. In response to the second optical path adjustment portion being in a first state, in light emitted by the light-emitting device, light incident to the second optical path adjustment portion through the first optical path adjustment portion is refracted, or is scattered for at least once.

First claim

What is claimed is:

1. A display panel, comprising:
a first base substrate;
a color conversion layer arranged on the first base substrate;
a light-emitting device layer arranged between the first base substrate and the color conversion layer; and
a liquid crystal layer arranged between the light-emitting device layer and the color conversion layer,
wherein the light-emitting device layer comprises a light-emitting device; and the liquid crystal layer comprises a first optical path adjustment portion and a second optical path adjustment portion spaced apart from each other, wherein an orthographic projection of the first optical path adjustment portion on the first base substrate at least partially overlaps with an orthographic projection of the light-emitting device on the first base substrate, and an orthographic projection of the second optical path adjustment portion on the first base substrate is spaced apart from the orthographic projection of the light-emitting device on the first base substrate;
wherein the second optical path adjustment portion has at least a first state; and in response to the second optical path adjustment portion being in the first state, in light emitted by the light-emitting device, light incident to the second optical path adjustment portion through the first optical path adjustment portion is refracted so as to narrow a light output angle of the light-emitting device, or is scattered for at least once; and
wherein the display panel further comprises:
a second driving component arranged on the first base substrate,
wherein each of a liquid crystal in the first optical path adjustment portion and a liquid crystal in the second optical path adjustment portion comprises a third liquid crystal, the first optical path adjustment portion has a third state and a fourth state, and the first optical path adjustment portion is configured to switch between the third state and the fourth state in response to an electric field applied by the second driving component; and
wherein in response to the first optical path adjustment portion being in the third state and the second optical path adjustment portion being in the first state, the third liquid crystal in the first optical path adjustment portion is in an ordered arrangement, and the third liquid crystal in the second optical path adjustment portion is in a disordered arrangement, so that the light incident to the second optical path adjustment portion from the first optical path adjustment portion is scattered; in response to the first optical path adjustment portion being in the fourth state and the second optical path adjustment portion being in the first state, the third liquid crystal in the second optical path adjustment portion and the third liquid crystal in the first optical path adjustment portion are in a disordered arrangement.

2. The display panel according to claim 1 , wherein the display panel further comprises:
a first driving component arranged on the first base substrate,
wherein the second optical path adjustment portion has the first state and a second state, and the second optical path adjustment portion is configured to switch between the first state and the second state in response to an electric field applied by the first driving component; in response to the second optical path adjustment portion being in the first state, a refractive index of the second optical path adjustment portion is less than a refractive index of the first optical path adjustment portion, so that the light incident to the second optical path adjustment portion from the first optical path adjustment portion is refracted; and in response to the second optical path adjustment portion being in the second state, the refractive index of the second optical path adjustment portion is substantially equal to the refractive index of the first optical path adjustment portion.

3. The display panel according to claim 2 , wherein an orthographic projection of the first driving component on the first base substrate is spaced apart from the orthographic projection of the first optical path adjustment portion on the first base substrate.

4. The display panel according to claim 2 , wherein the display panel further comprises:
a first electrode layer arranged on a side of the liquid crystal layer proximate to the first base substrate; and
a second electrode layer arranged on a side of the liquid crystal layer away from the first base substrate,
wherein the first driving component comprises a first electrode in the first electrode layer and a second electrode in the second electrode layer.

5. The display panel according to claim 4 , wherein the display panel further comprises a pixel circuit layer arranged between the light-emitting device layer and the first base substrate; and
the pixel circuit layer comprises a first thin film transistor, and a first terminal of the light-emitting device is electrically connected with a first electrode of the first thin film transistor through a first connection electrode,
wherein the first connection electrode and the first electrode of the first driving component are arranged in a same layer and made of a same material.

6. The display panel according to claim 5 , wherein the second electrode of the first driving component is electrically connected with a first voltage terminal, and the first electrode of the first driving component is electrically connected with a second terminal of the light-emitting device and a second voltage terminal; or
the second electrode of the first driving component is electrically connected with the first voltage terminal, and the first electrode of the first driving component is electrically connected with the first terminal of the light-emitting device.

7. The display panel according to claim 2 , wherein the display panel further comprises a third electrode layer arranged on a side of the liquid crystal layer proximate to the first base substrate, the first driving component comprises a third electrode in the third electrode layer, and the third electrode comprises a first sub electrode and a second sub electrode spaced apart from each other,
wherein the first driving component is configured to generate the electric field in response to a first electric signal provided to the first sub electrode and a second electric signal provided to the second sub electrode.

8. The display panel according to claim 2 , wherein an electrical signal provided to the first driving component comprises an AC signal.

9. The display panel according to claim 1 , wherein a liquid crystal in the second optical path adjustment portion comprises a first liquid crystal and a second liquid crystal, and the second liquid crystal is obtained by irradiating a photopolymer liquid crystal material with ultraviolet light under a preset electric field,
wherein the second liquid crystal is configured to keep a long axis of the first liquid crystal in a preset direction, so that the second optical path adjustment portion is remained in the first state at all times.

10. The display panel according to claim 1 , wherein the display panel further comprises a fourth electrode layer arranged on a side of the liquid crystal layer away from the first base substrate and a pixel circuit layer arranged between the light-emitting device layer and the first base substrate, the second driving component comprises a fourth electrode in the fourth electrode layer, and the fourth electrode is electrically connected with a third voltage terminal,
wherein the pixel circuit layer comprises a first thin film transistor, a first terminal of the light-emitting device is electrically connected with the first thin film transistor, and a second termin

Assignees

• Boe Technology Group Co Ltd

Inventors

• Shu Shi
• Li Xiang
• Li Wei
• Yu Yong
• Li Shaohui
• Yao Qi

Classifications

• G02F2202/36

  Micro- or nanomaterials · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F1/13452

  Conductors connecting driver circuitry and terminals of panels · CPC title

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G02F1/133788

  by light irradiation, e.g. linearly polarised light photo-polymerisation · CPC title