Light adjustment device

Patent metadata

Field	Value
Publication number	US-12379631-B2
Application number	US-202418911923-A
Country	US
Kind code	B2
Filing date	Oct 10, 2024
Priority date	Apr 19, 2022
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

According to an aspect, a light adjustment device includes: first, second, and third frames and light adjustment panels. The first frame, the second frame, and the third frame have annular shapes and are stacked in a first direction. The first frame includes a first hook that protrudes to the one side in the first direction. The second frame includes a first cutout into which the first hook is hooked, and a second hook that protrudes to the one side in the first direction. The third frame includes a second cutout into which the second hook is hooked. The first hook does not overlap the second hook when viewed in the first direction. One of the light adjustment panels is disposed between the first frame and the second frame, and another of the light adjustment panels is disposed between the second frame and the third frame.

First claim

What is claimed is:

1. A light adjustment device comprising:
a first frame;
a second frame;
a third frame; and
a plurality of light adjustment panels,
wherein the first frame, the second frame, and the third frame have annular shapes and are stacked in a first direction, and the number of the second frames is at least one,
wherein the second frame is disposed on one side in the first direction relative to the first frame, and the third frame is disposed on the one side in the first direction relative to the second frame,
wherein the first frame comprises a first hook that protrudes to the one side in the first direction,
wherein the second frame comprises
a first cutout into which the first hook is hooked, and
a second hook that protrudes to the one side in the first direction,

wherein the third frame comprises a second cutout into which the second hook is hooked,
wherein the first hook does not overlap the second hook when viewed in the first direction, and
wherein one of the light adjustment panels is disposed between the first frame and the second frame, and another of the light adjustment panels is disposed between the second frame and the third frame.

2. The light adjustment device according to claim 1 ,
wherein the second frame includes a first arm that contacts the light adjustment panel disposed between the first frame and the second frame, and
wherein the third frame includes a second arm that contacts the light adjustment panel disposed between the second frame and the third frame.

3. The light adjustment device according to claim 1 ,
wherein the first frame includes a rod protruding to the one side in the first direction, and
wherein the second frame and the third frame are each provided with a through-hole through which the rod penetrates.

4. The light adjustment device according to claim 1 ,
wherein the light adjustment device comprises a plurality of the second frames, and each of the second frames comprises a plurality of the first cutouts and a plurality of the second hooks,
wherein, of two of the second frames adjacent to each other in the first direction, the second hooks of the second frame on the other side in the first direction are hooked into the first cutouts of the second frame on the one side in the first direction, and
wherein one of the light adjustment panels is disposed between the second frame on the other side in the first direction and the second frame on the one side in the first direction.

5. The light adjustment device according to claim 4 ,
wherein when viewed in the first direction, the second frames each have an annular shape extending in a circumferential direction about an axis at a radial center,
wherein, of two of the second frames adjacent to each other in the first direction, the second frame on the other side in the first direction is provided in a state of being rotated to one side in the circumferential direction relative to the second frame on the one side in the first direction, and
wherein the second hooks of the second frames do not overlap each other when viewed in the first direction.

6. The light adjustment device according to claim 4 ,
wherein the light adjustment device comprises three or more of the second frames,
wherein a second one of the second frames is provided on the one side in the first direction relative to a first one of the second frames, and a third one of the second frames is provided on the one side in the first direction relative to the second one, and
wherein the second hook of the first one of the second frames is hooked into the first cutout of the second one of the second frames, and a distal end part of the second hook provided on the one side in the first direction is inserted into the first cutout of the third one of the second frames.

7. The light adjustment device according to claim 1 ,
wherein the first frame comprises a protruding part protruding to the one side in the first direction, extending along an outer edge of the light adjustment panel disposed between the first frame and the second frame, and having a height larger than a thickness of the light adjustment panel.

8. The light adjustment device according to claim 7 ,
wherein the protruding part includes a protrusion that protrudes toward the outer edge of the light adjustment panel disposed on an inner side of the protruding part and is capable of contacting the outer edge of the light adjustment panel.

9. The light adjustment device according to claim 1 ,
wherein the second frame comprises a protruding part protruding to the one side in the first direction, extending along an outer edge of the light adjustment panel disposed between the second frame and the third frame, and having a height larger than a thickness of the light adjustment panel.

10. The light adjustment device according to claim 9 ,
wherein the protruding part includes a protrusion that protrudes toward the outer edge of the light adjustment panel disposed on an inner side of the protruding part and is capable of contacting the outer edge of the light adjustment panel.

Assignees

• Japan Display Inc

Inventors

• Hamano Daisuke

Classifications

• G02F1/133317

  Intermediate frames, e.g. between backlight housing and front frame · CPC title

• G02F1/1333

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/13

  based on liquid crystals, e.g. single liquid crystal display cells · CPC title

• F21V21/22

  telescopic · CPC title

• G02F1/1347 Primary

  Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells · CPC title