Display panel with light-shielding patterns, display device and display method

• US 10,969,617 B2
• Filed: 07/06/2018
• Issued: 04/06/2021
• Est. Priority Date: 12/08/2017
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Li, Zhongxiao, Zhao, Wenqing
• Primary Examiner(s): Mistry, Ram A
• Application Number:
  US16/029,295
• Publication Number:
  US 20190179197A1
• Time in Patent Office: 1,005 Days
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133531 characterised by the arrangement of polariser or analyser axes
• CPC Class Codes: G09G 2300/023 Display panel composed of stacked panels
• CPC Class Codes: G09G 2300/0439 Pixel structures
• CPC Class Codes: G09G 2310/0221 with use of split matrices G09G3/3644 and G09G3/3666 take precedence
• CPC Class Codes: G09G 2320/028 by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A display panel, a display device and a display method are provided. The display panel includes: first pixels configured to display a first image; second pixels configured to display a second image. The display panel further includes light-shielding patterns configured to shield part of light beams emitted by the second pixels.

Claims

1. A display panel, comprising a plurality of pixels, wherein the pixels comprise:

first pixels configured to display a first image; and

second pixels configured to display a second image;

wherein the display panel further comprises light-shielding patterns configured to shield part of light beams emitted by the second pixels, the light-shielding patterns comprise a first light-shielding sub pattern and a second light-shielding sub pattern arranged at different layers;

the display panel further comprises an upper substrate, a lower substrate opposite to each other and a liquid crystal layer between the upper substrate and the lower substrate;

the first light-shielding sub pattern is on one side of the upper substrate close to the liquid crystal layer, the second light-shielding sub pattern is on one side of the lower substrate close to the liquid crystal layer, and the liquid crystal layer is disposed between the first light-shielding sub pattern and the second light-shielding sub pattern; and

orthographic projections of the light-shielding patterns to the lower substrate do not overlap with orthographic projections of the first pixels to the lower substrate.

2. The display panel according to claim 1, wherein the second light-shielding sub pattern comprises a slit, and an orthographic projection of the slit onto the first light-shielding sub pattern at least partially overlaps the first light-shielding sub pattern.

3. The display panel according to claim 2, wherein the orthographic projection of the slit onto the first light-shielding sub pattern is within the first light-shielding sub pattern.

4. The display panel according to claim 2, wherein a width of the first light-shielding sub pattern is:

b=a+2×

tan θ

×

h, wherein a is a width of the slit, h is a vertical interval between the first light-shielding sub pattern and the second light-shielding sub pattern, b is the width of the first light-shielding sub pattern, θ

is an angle, wherein η

₁×

sin θ

=η

₂×

sin Φ

, Φ

is a privacy angle, η

₁ is a refractive index of a medium in a cell of the display panel, and η

₂ is a refractive index of air.

5. The display panel according to claim 1, further comprising:

a liquid crystal layer between the upper substrate and the lower substrate;

an upper polarizer at a side of the upper substrate away from the lower substrate; and

a lower polarizer at a side of the lower substrate away from the upper substrate;

wherein an optical transmission axis of the upper polarizer is perpendicular to an optical transmission axis of the lower polarizer, and an initial orientation of liquid crystal molecules of the liquid crystal layer corresponding to the second pixels is parallel to the optical transmission axis of the upper polarizer.

6. The display panel according to claim 1, further comprising:

a liquid crystal layer between the upper substrate and the lower substrate;

an upper polarizer at a side of the upper substrate away from the lower substrate; and

a lower polarizer at a side of the lower substrate away from the upper substrate;

wherein an optical transmission axis of the upper polarizer is perpendicular to an optical transmission axis of the lower polarizer, and an initial orientation of liquid crystal molecules of the liquid crystal layer corresponding to the second pixels is parallel to the optical transmission axis of the lower polarizer.

7. The display panel according to claim 1, wherein the first pixels and the second pixels are arranged alternately.

8. A display device, comprising:

the display panel according to claim 1,

a first driver, configured to apply a first driving signal to the first pixels, to enable the first pixels to display a first image; and

a second driver, configured to apply a second driving signal to the second pixels, to enable the second pixels to display a second image.

9. The display device according to claim 8, wherein the first image is a normal image, and the second image is an interference image.

10. The display device according to claim 8, wherein the first image and the second image together forms a normal image.

11. The display device according to claim 8, wherein the second light-shielding sub pattern comprises a slit, and an orthographic projection of the slit onto the first light-shielding sub pattern at least partially overlaps the first light-shielding sub pattern.

12. The display device according to claim 11, wherein the orthographic projection of the slit onto the first light-shielding sub pattern is within the first light-shielding sub pattern.

13. The display device according to claim 11, wherein a width of the first light-shielding sub pattern is:

b=a+2×

tan θ

×

h, wherein a is a width of the slit, h is a vertical interval between the first light-shielding sub pattern and the second light-shielding sub pattern, b is the width of the first light-shielding sub pattern, θ

is an angle, wherein η

₁×

sin θ

=η

₂×

sin Φ

, Φ

is a privacy angle, η

₁ is a refractive index of a medium in a cell of the display panel, and η

₂ is a refractive index of air.

14. A display method of a display device, wherein the display device comprises the display panel according to claim 1, the display method comprises:

applying a first driving signal to the first pixels, to enable the first pixels to display a first image;

applying a second driving signal to the second pixels, to enable the second pixels to display a second image.

15. The method according to claim 14, wherein the first image is a normal image, and the second image is an interference image.

16. The method according to claim 14, wherein the first image and the second image together forms a normal image.

17. The method according to claim 14, wherein the second light-shielding sub pattern comprises a slit, and an orthographic projection of the slit onto the first light-shielding sub pattern at least partially overlaps the first light-shielding sub pattern.

18. The method according to claim 17, wherein a width of the first light-shielding sub pattern is:

b=a+2×

tan θ

×

h, wherein a is a width of the slit, h is a vertical interval between the first light-shielding sub pattern and the second light-shielding sub pattern, b is the width of the first light-shielding sub pattern, θ

is an angle, wherein η

₁×

sin θ

=η

₂×

sin Φ

, Φ

is a privacy angle, η

₁ is a refractive index of a medium in a cell of the display panel, and η

₂ is a refractive index of air.

19. A display panel, comprising a plurality of pixels, wherein the pixels comprise:

first pixels configured to display a first image; and

second pixels configured to display a second image;

wherein the display panel further comprises light-shielding patterns configured to shield part of light beams emitted by the second pixels, the light-shielding patterns comprise a first light-shielding sub pattern and a second light-shielding sub pattern arranged at different layers along a direction perpendicular to a lower substrate;

the display panel further comprises an upper substrate, the lower substrate opposite to each other and a liquid crystal layer between the upper substrate and the lower substrate;

the first light-shielding sub pattern is on one side of the upper substrate close to the liquid crystal layer, and the second light-shielding sub pattern is on one side of the lower substrate close to the liquid crystal layer, the liquid crystal layer is disposed between the first light-shielding sub pattern and the second light-shielding sub pattern;

and orthographic projections of the light-shielding patterns to the lower substrate do not overlap with orthographic projections of the first pixels to the lower substrate.

20. A display panel, comprising a plurality of pixels, wherein the pixels comprise:

first pixels configured to display a first image; and

second pixels configured to display a second image;

wherein the display panel further comprises light-shielding patterns configured to shield part of light beams emitted by the second pixels, the light-shielding patterns comprise a first light-shielding sub pattern and a second light-shielding sub pattern arranged at different layers along a direction perpendicular to a lower substrate;

the display panel further comprises an upper substrate, the lower substrate opposite to each other and a liquid crystal layer between the upper substrate and the lower substrate;

the first light-shielding sub pattern is on one side of the upper substrate close to the liquid crystal layer, and the second light-shielding sub pattern is on one side of the lower substrate close to the liquid crystal layer, and the liquid crystal layer is disposed between the first light-shielding sub pattern and the second light-shielding sub pattern;

an orthographic projection of the first light-shielding sub pattern to the lower substrate is only within an orthographic projection of a second pixel to the lower substrate, and orthographic projections of the light-shielding patterns to the lower substrate do not overlap with orthographic projections of the first pixels to the lower substrate.