Privacy film, preparation method thereof and splice panel

Patent metadata

Field	Value
Publication number	US-12265241-B2
Application number	US-202217758983-A
Country	US
Kind code	B2
Filing date	Jun 24, 2022
Priority date	May 31, 2022
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

Embodiments of the present application disclose a privacy film, a preparation method thereof and a splice panel. The privacy film includes a substrate and a plurality of gratings disposed on the substrate, wherein the plurality of gratings are spaced in a first direction and a second direction, and the first direction intersects the second direction.

First claim

What is claimed is:

1. A privacy film, comprising:
a substrate; and
a plurality of gratings disposed on the substrate, wherein the plurality of gratings are spaced in a first direction and a second direction, and the first direction intersects the second direction;
wherein the plurality of gratings include a plurality of first gratings and a plurality of second gratings; the plurality of first gratings are spaced in the first direction and the second direction, and each of the plurality of first gratings extends in the first direction; the plurality of the second gratings are spaced in the first direction and the second direction, and each of the plurality of second gratings extends in the second direction; and
wherein each of the plurality of first gratings is connected to a corresponding one of the plurality of second gratings.

2. The privacy film of claim 1 , wherein each of the plurality of gratings extends in the first direction.

3. The privacy film of claim 2 , wherein the privacy film further comprises a connecting body, the connecting body is connected between two adjacent gratings in the first direction, and a thickness of the connecting body is less than a thickness of the grating.

4. The privacy film of claim 1 , wherein a first opening is spaced between two adjacent first gratings in the first direction; and a second opening is spaced between two adjacent second gratings in the second direction;
wherein a plurality of first openings are arranged in the second direction to form a first optical channel; and a plurality of second openings are arranged in the first direction to form a second optical channel.

5. The privacy film of claim 1 , wherein the first grating is spaced from the second grating.

6. The privacy film of claim 5 , wherein a first opening is spaced between two adjacent first gratings in the first direction; and the second grating is disposed between two adjacent first openings in the second direction;
wherein a second opening is spaced between two adjacent second gratings in the second direction; and the first grating is disposed between two adjacent second openings in the first direction.

7. The privacy film of claim 6 , wherein a width of a first opening is greater than a width of the second grating in the first direction;
wherein a plurality of first openings are arranged to form at least one first optical channel in the second direction.

8. The privacy film of claim 7 , wherein a width of a second opening is greater than a width of the first grating in the second direction;
wherein a plurality of second openings are arranged to form at least one second optical channel in the first direction.

9. The privacy film of claim 8 , wherein a plurality of hollowed-out regions are provided in areas where the first opening and the second opening overlap, the hollowed-out regions are arranged in a third direction to form a third optical channel, and the hollowed-out regions are arranged in a fourth direction to form a fourth optical channel;
wherein the first direction, the second direction, the third direction, and the fourth direction intersect each other.

10. The privacy film of claim 4 , wherein a length of the first grating is equal to a length of the second grating, and a length of the first opening in the first direction is equal to a length of the first opening in the second direction.

11. The privacy film of claim 1 , wherein the privacy film comprises a first region located in a middle region and a second region disposed on both sides of the first region, a density of the plurality of gratings located in the first region is less than a density of the plurality of gratings located in the second region, and/or heights of the plurality of gratings located in the first region are less than heights of the plurality of gratings located in the second region.

12. A preparation method of privacy film, comprising:
forming an adhesive layer on a substrate;
forming a grating material layer on the adhesive layer;
punching the grating material layer to form a plurality of first gratings, wherein the plurality of first gratings are spaced in the first direction and the second direction, and each of the plurality of first gratings extends in the first direction; and
punching the grating material layer to form a plurality of second gratings, wherein the plurality of the second gratings are spaced in the first direction and the second direction, and each of the plurality of second gratings extends in the second direction;
wherein each of the plurality of first gratings is connected to a corresponding one of the plurality of second gratings.

13. A splice panel, comprising:
at least two first panels, wherein the at least two first panels are spliced, and a gap is provided between two adjacent first panels; and
at least one second panel, wherein the at least one second panel is disposed on a light-emitting surface or light-entering surface of two adjacent first panels and shields the gap;
wherein the second panel includes a panel body and a privacy film disposed on the panel body; and a side-view brightness of the panel body is greater than a side-view brightness of the first panel;
wherein a splicing direction of two adjacent first panels intersects a first direction;
wherein the privacy film comprises:
a substrate;
a plurality of gratings disposed on the substrate, wherein the plurality of gratings are spaced in a first direction and a second direction, and the first direction intersects the second direction.

14. The splice panel of claim 13 , wherein each of the plurality of gratings extends in the first direction.

15. The splice panel of claim 14 , wherein the privacy film further comprises a connecting body, the connecting body is connected between two adjacent gratings in the first direction, and a thickness of the connecting body is less than a thickness of the grating.

16. The splice panel of claim 13 , wherein the plurality of gratings include a plurality of first gratings and a plurality of second gratings, wherein the plurality of first gratings are spaced in the first direction and the second direction, and each of the plurality of first gratings extends in the first direction;
wherein the plurality of the second gratings are spaced in the first direction and the second direction, and each of the plurality of second gratings extends in the second direction.

17. The splice panel of claim 16 , wherein the first grating is connected to the second grating.

18. The splice panel of claim 17 , wherein a first opening is spaced between two adjacent first gratings in the first direction; and a second opening is spaced between two adjacent second gratings in the second direction;
wherein a plurality of first openings are arranged in the second direction to form a first optical channel; and a plurality of second openings are arranged in the first direction to form a second optical channel.

19. The preparation method of privacy film of claim 12 , wherein each of the plurality of gratings extends in the first direction.

20. The preparation method of privacy film of claim 19 , wherein the privacy film further comprises a connecting body, the connecting body is connected between two adjacent gratings in the first direction, and a thickness of the connecting body is less than a thickness of the grating.

Assignees

• Tcl China Star Optoelectronics Tech Co Ltd

Inventors

• Sun Hejing

Classifications

• G02B5/1852 Primary

  using mechanical means, e.g. ruling with diamond tool, moulding · CPC title

• G02B5/1819 Primary

  Plural gratings positioned on the same surface, e.g. array of gratings (plural diffractive elements positioned sequentially along the optical path G02B27/4272) · CPC title

• G09F9/35

  being liquid crystals (G09F9/302 takes precedence; liquid crystal materials C09K19/00; {liquid crystal panels comprising a number of electrodes in a single cell per se G02F1/13}) · CPC title

• G09F9/33

  being semiconductor devices, e.g. diodes · CPC title

• G02B5/1857

  using exposure or etching means, e.g. holography, photolithography, exposure to electron or ion beams · CPC title