Projection device

Patent metadata

Field	Value
Publication number	US-11525729-B2
Application number	US-202017095745-A
Country	US
Kind code	B2
Filing date	Nov 12, 2020
Priority date	Nov 15, 2019
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

A projection device and a household appliance are provided. The projection device includes a casing, a lens component, and a pattern lighting module. An opening is disposed at a front end of the casing. The lens component is disposed inside an accommodating space of the casing and fixed on the casing, and the lens component corresponds to the opening. The pattern lighting module is disposed inside the accommodating space of the casing and fixed on the casing, and the pattern lighting module corresponds to the lens component. The pattern lighting module emits at least one patterned light beam that passes through the lens component and the opening sequentially.

First claim

What is claimed is:

1. A projection device, comprising:
a casing having an opening that is disposed at a front end of the casing;
a lens component disposed inside an accommodating space of the casing and fixed on the casing, the lens component corresponding to the opening; and
a pattern lighting module disposed inside the accommodating space of the casing and fixed on the casing, the pattern lighting module corresponding to the lens component, wherein the pattern lighting module includes a pattern film, a reflective cover, and a light component, and wherein the reflective cover has at least one through hole, the reflective cover is disposed on the light component, and the pattern film is disposed on the reflective cover and disposed corresponding to the at least one through hole;
wherein the pattern lighting module emits at least one patterned light beam that sequentially passes through the lens component and the opening.

2. The projection device according to claim 1 , wherein an area of the opening is less than an area of the lens component.

3. The projection device according to claim 1 , wherein a ratio of an area of the opening to an area of the lens component is between 0.25 and 0.5.

4. The projection device according to claim 1 , wherein at least one positioning hole is formed on a bottom side of the casing, at least one positioning rod is disposed on a bottom portion of the lens component corresponding to the at least one positioning hole, and the lens component is fixed on the casing by insertion of the at least one positioning rod through the at least one positioning hole.

5. The projection device according to claim 4 , wherein a carrying part is configured to a back end of the casing, and the pattern lighting module is disposed on the carrying part and fixed on the casing.

6. The projection device according to claim 1 , wherein the casing includes a first casing and a second casing, and the first casing and the second casing are detachably engaged with each other, and wherein the first casing has a first engaging member, the second casing has a second engaging member corresponding to the first engaging member, and the first casing and the second casing are engaged with each other by engagement of the first engaging member to the second engaging member.

7. The projection device according to claim 6 , wherein the first engaging member is a buckle and the second engaging member is a through hole having a shape corresponding to that of the buckle.

8. The projection device according to claim 1 , wherein the light component emits at least one initial light beam that sequentially passes through the at least one through hole and the pattern film, so as to form the at least one patterned light beam.

9. The projection device according to claim 8 , wherein the light component is at least one light emitting diode unit that forms at least one point light source, and the at least one point light source corresponds to the at least one through hole.

10. The projection device according to claim 8 , wherein the at least one through hole is utilized to arrange patterns, numbers, and characters.

11. The projection device according to claim 10 , wherein the light component is a digit display unit that forms at least one of a pattern light source, a number light source, and a character light source, and the pattern light source, the number light source, or the character light source respectively corresponds to one of the patterns, one of the numbers, or one of the characters that is arranged by the at least one through hole.

12. The projection device according to claim 1 , wherein the lens component has an inner thickness that is greater than 0 millimeters.

13. The projection device according to claim 1 , wherein the lens component has a diopter that is greater than 0.022.

14. The projection device according to claim 1 , wherein the lens component is a plane-convex lens that includes a first convex surface and a plane surface, the first convex surface faces toward the opening, and the plane surface faces toward the pattern lighting module.

15. The projection device according to claim 1 , wherein the lens component is a biconvex lens that includes two second convex surfaces, the two second convex surfaces respectively face toward the opening and the pattern lighting module.

16. The projection device according to claim 15 , wherein a curvature of each of the two second convex surfaces are between 0.025 and 0.05.

Assignees

• Lite On Opto Tech Changzhou Co Ltd
• Lite On Technology Corp

Inventors

• Lee Chia-Ming

Classifications

• G01J1/0474

  Diffusers (cavities G01J2001/0481) · CPC title

• G03B21/145

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

• F21V17/101

  permanently, e.g. welding, gluing or riveting · CPC title

• G03B21/2033

  LED or laser light sources · CPC title

• H05B35/00

  Electric light sources using a combination of different types of light generation · CPC title