Projector

Patent metadata

Field	Value
Publication number	US-11822219-B2
Application number	US-202117361652-A
Country	US
Kind code	B2
Filing date	Jun 29, 2021
Priority date	Jun 6, 2019
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

A projector includes a shell, a light source, an optical machine, a projection lens and an auxiliary positioning device. The light source is configured to provide illumination beams. The optical engine is configured to modulate the illumination beams based on received image signals to obtain projection beams. The projection lens is configured to project the projection beams on a projection plane for imaging. The auxiliary positioning device is connected to the shell and is configured to locate a position the projector. The auxiliary positioning device includes a positioning rod which includes a first end and a second end opposite to the first end; the first end of the positioning rod is connected to the shell, and the second end of the positioning rod is configured to abut against a reference object that is at a fixed position relative to the projection plane.

First claim

What is claimed is:

1. A projector, comprising:
a shell;
a light source arranged inside the shell and configured to provide illumination beams;
an optical engine arranged inside the shell and connected to the light source, and configured to modulate the illumination beams based on received image signals to obtain projection beams;
a projection lens arranged inside the shell and connected to the optical engine, and configured to project the projection beams on a projection plane for imaging;
an auxiliary positioning device connected to the shell and configured to locate a position of the projector; and
a connecting member; wherein
the auxiliary positioning device includes: a positioning rod including a first end and a second end opposite to the first end;
the first end of the positioning rod is connected with the shell, the second end of the positioning rod is configured to abut against a reference object which is at a fixed position relative to the projection plane;
the positioning rod includes a positioning rod fixing screw, and a positioning rod fixing hole provided at the first end of the positioning rod;
the positioning rod fixing screw passes through the positioning rod fixing hole and is connected to the connecting member, so that the first end of the positioning rod is connected to the shell through the positioning rod fixing screw and the connecting member; and
the positioning rod fixing hole is in clearance fit with the connecting member, so that the positioning rod is configured to rotate around the connecting member.

2. The projector according to claim 1 , wherein the connecting member comprises a rivet nut.

3. The projector according to claim 1 , wherein the auxiliary positioning device further comprises a fixing plate, and the fixing plate is connected with the shell; and
the first end of the positioning rod is connected to the fixing plate through the connecting member.

4. The projector according to claim 3 , wherein the fixing plate includes a fixing plate body, a fixing plate screw, and a fixing plate through hole provided on the fixing plate body;
the shell includes a threaded hole; and
the fixing plate screw passes through the fixing plate through hole and is connected to the threaded hole, so that the fixing plate is connected to the shell.

5. The projector according to claim 4 , wherein
the shell includes a boss protruding to the outside of the projector, and the threaded hole is disposed inside the boss;
the fixing plate includes a protrusion protruding to the outside of the projector, and the fixing plate through hole is disposed inside the protrusion; and
the protrusion is nested on the boss, and the fixing plate through hole corresponds to the threaded hole.

6. The projector according to claim 4 , wherein the fixing plate further comprises a flexible gasket located on a surface of the fixing plate body close to the shell.

7. The projector according to claim 4 , wherein
the fixing plate further includes a cover arranged on a side of the fixing plate body away from the fixing plate through hole;
the cover includes a first wall that is substantially perpendicular to the fixing plate body, a second wall that is substantially parallel to the fixing plate body, and a side wall that is substantially perpendicular to the fixing plate body and connected to the first wall and the second wall; the connecting member is arranged on the second wall of the cover.

8. The projector according to claim 7 , wherein
the shell includes an upper shell and a lower shell which are arranged oppositely, a front shell and a rear shell which are arranged oppositely, and a left shell and a right shell which are arranged oppositely;
the positioning rod includes a limiting protrusion arranged on an outer circumference of the positioning rod fixing hole along an axial direction of the positioning rod, and the cover includes a positioning limiting portion provided on the first wall and a retracting limiting portion on the side wall; and
the positioning limiting portion is configured to cooperate with the limiting protrusion to limit the positioning rod in a positioning direction, and the retracting limiting portion is configured to cooperate with the limiting protrusion to limit the positioning rod in a retracting direction; wherein, the positioning direction is substantially perpendicular to the rear shell, and the retracting direction is substantially perpendicular to the left shell.

9. The projector of claim 8 , wherein the positioning limiting portion is a recess, and the retracting limiting portion is a protrusion.

10. The projector according to claim 1 , wherein the shell includes an upper shell and a lower shell that are opposed to each other, a front shell and a rear shell that are opposed to each other, and, a left shell and a right shell that are opposed to each other;
the lower shell includes a bottom plate, a front plate and a back plate arranged oppositely, and two side plates arranged oppositely; the front plate is located under the front shell, and the back plate is located under the rear shell; the lower shell further includes a groove provided on the back plate and recessed into the projector; and
the groove includes a first plane that is substantially perpendicular to the bottom plate, a second plane that is substantially parallel to the bottom plate, and two opposite side surfaces that are substantially perpendicular to the bottom plate; the connecting member is disposed on the second plane of the groove.

11. The projector according to claim 10 , wherein
the positioning rod includes a limiting protrusion arranged on the outer circumference of the positioning rod fixing hole along an axial direction of the positioning rod; the groove includes a positioning limiting portion provided on the first plane and a retracting limiting portion on a side face; and
the positioning limiting portion is configured to cooperate with the limiting protrusion to limit the positioning rod in a positioning direction, and the retracting limiting portion is configured to cooperate with the limiting protrusion to limit the positioning rod in a retracting direction; wherein, the positioning direction is substantially perpendicular to the rear shell, and the retracting direction is substantially perpendicular to the left shell.

12. The projector of claim 11 , wherein the positioning limiting portion is a recess, and the retracting limiting portion is a protrusion.

13. A projector, comprising:
a shell;
a light source arranged inside the shell and configured to provide illumination beams;
an optical engine arranged inside the shell and connected to the light source, and configured to modulate the illumination beams based on received image signals to obtain projection beams;
a projection lens arranged inside the shell and connected to the optical engine, and configured to project the projection beams on a projection plane for imaging; and
an auxiliary positioning device connected to the shell and configured to locate a position of the projector; wherein
the auxiliary positioning device includes: a positioning rod including a first end and a second end opposite to the first end;
the first end of the positioning rod is connected with the shell, the second end of the positioning rod is configured to abut against a reference object which is at a fixed position relative to the projection plane;
the positioning rod comprises a base rod, first to (N)th telescopic rods, and first to (N)th locking nuts, in which N is a natural number and equal to or greater than 2;
the first telescopic rod is disposed in the base rod, and the first to (N)th t

Assignees

• Hisense Laser Display Co Ltd

Inventors

• Zhou Boyu
• Yang Changming
• Tian Xintuan
• Cai Wenbang
• Yin Haijun
• Zhang Jian

Classifications

• G03B21/145 Primary

  Housing details, e.g. position adjustments thereof · CPC title

• G03B21/142

  Adjusting of projection optics · CPC title

• G03B21/2066

  Reflectors in illumination beam (in projection beam G03B21/28) · CPC title

• G03B21/14 Primary

  Details · CPC title

• G03B21/56

  Projection screens · CPC title