Projection device

Patent metadata

Field	Value
Publication number	US-2019250401-A1
Application number	US-201816214136-A
Country	US
Kind code	A1
Filing date	Dec 10, 2018
Priority date	Feb 13, 2018
Publication date	Aug 15, 2019
Grant date	—

Abstract

A projection device includes at least one projection module and at least one adjusting structure. The projection module has an optical axis and is adapted to emit an image beam. The image beam is transmitted to a projection target to form a projection image. The adjusting structure includes a base and an adjusting component. The adjusting component is rotatably connected to the base along a first axis, and the projection module is rotatably connected to the adjusting component along the optical axis. The adjusting component and the projection module are adapted to rotate along the first axis such that the projection image moves vertically, and the projection module is adapted to rotate along the optical axis such that the projection image rotates.

First claim

What is claimed is:

1 . A projection device comprising:
at least one projection module having an optical axis, wherein the projection module is adapted to emit an image beam, and the image beam is transmitted to a projection target to form a projection image; and at least one adjusting structure comprising a base and an adjusting component, wherein the adjusting component is rotatably connected to the base along a first axis, and the at least one projection module is rotatably connected to the adjusting component along the optical axis, wherein the adjusting component and the projection module are adapted to rotate along the first axis such that the projection image moves vertically, and the projection module is adapted to rotate along the optical axis such that the projection image rotates.

2 . The projection device of claim 1 , further comprising at least one reflecting component disposed on the optical axis and comprising a reflecting surface, wherein the reflecting surface is adapted to reflect the image beam, and the image beam is reflected by the reflecting surface to the projection target to form the projection image.

3 . The projection device of claim 2 , wherein the at least one reflecting component is rotatably connected to the base along a second axis, and the reflecting component is adapted to rotate along the second axis such that the projection image moves horizontally.

4 . The projection device of claim 3 , wherein the first axis and the second axis intersect with the optical axis.

5 . The projection device of claim 3 , wherein the first axis, the second axis, and the optical axis are perpendicular to each other.

6 . The projection device of claim 1 , wherein the adjusting component is a sleeve, and the sleeve is fit around at least a portion of the projection module.

7 . The projection device of claim 6 , wherein the sleeve is threadedly jointed to the projection module.

8 . The projection device of claim 1 , wherein the adjusting component comprises a pivoting portion and a sliding portion, the pivoting portion is pivotally connected to the base along the first axis, and the sliding portion is slidably disposed on the base and is adapted to slide along the base along with pivotal rotation of the adjusting component.

9 . The projection device of claim 8 , wherein the base has a pivot hole, and the pivoting portion is pivotally connected to the pivot hole.

10 . The projection device of claim 8 , wherein the base has a slide groove, and the sliding portion is slidably disposed in the slide groove.

11 . The projection device of claim 2 , wherein a gap is present between the reflecting component and the projection module.

12 . The projection device of claim 1 , wherein the projection module comprises a light source, a light valve, and a lens set, wherein the light source is adapted to emit an illumination beam, the light valve is located on a transmission path of the illumination beam and is adapted to convert the illumination beam into the image beam, and the lens set is located on a transmission path of the image beam and is adapted to transmit the image beam to outside the projection module.

13 . The projection device of claim 1 , further comprising at least one waveguide component, wherein the image beam passes through the at least one waveguide component and then forms the projection image.

14 . The projection device of claim 1 , wherein the projection image is a virtual image.

15 . The projection device of claim 1 , wherein the at least one projection module comprises two of the projection modules, the at least one adjusting structure comprises two of the adjusting structures respectively corresponding to the two projection modules, and two of the projection images formed by the two projection modules overlap with each other through adjustment by the two adjusting structures.

Assignees

• Coretronic Corp

Inventors

• Chao Chin-Sheng
• Cheng Chuan-Te
• Shih Chih-Wei
• Lin Meng-Hsuan

Classifications

• G03B21/142

  Adjusting of projection optics · CPC title

• G02B7/003 Primary

  Alignment of optical elements (G02B7/001, G02B7/002 take precedence; for mirrors G02B7/1822) · CPC title

• G03B21/2066

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

• G03B21/147

  Optical correction of image distortions, e.g. keystone · CPC title

• G03B21/145 Primary

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