CN106597783B

CN106597783B - Projector with a light source

Info

Publication number: CN106597783B
Application number: CN201611263453.9A
Authority: CN
Inventors: 王士铭; 萧启宏; 林颖芳
Original assignee: Qisda Optronics Suzhou Co Ltd; Qisda Corp
Current assignee: Qisda Optronics Suzhou Co Ltd; Qisda Corp
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2020-07-14
Anticipated expiration: 2036-12-30
Also published as: CN106597783A

Abstract

The invention provides a projector, which comprises a plurality of first optical elements, an optical machine shell, a color wheel module and a color wheel cover body, wherein the plurality of first optical elements are used for providing and/or transmitting light rays, the optical machine shell is used for arranging the plurality of first optical elements, the optical machine shell is provided with a first cavity and a first opening, the first cavity is communicated with the first opening, the color wheel module is arranged at the first opening, at least part of the color wheel module extends into the first cavity through the first opening, the color wheel cover body is used for covering the part of the color wheel module exposed out of the first cavity and covering the first opening, and the part of the color wheel module positioned in the first cavity is positioned on a transmission path of the light rays so as to carry out wavelength conversion or light splitting on the light rays. The color wheel module is directly combined with the optical machine shell, so that the color wheel module extending into the optical machine shell is positioned on a transmission path of the light, and the brightness can be prevented from being reduced.

Description

Projector with a light source

Technical Field

The invention relates to the field of projectors, in particular to a projector capable of improving brightness.

Background

The D L P projector has digital advantages, high image grey level, no noise, stable picture quality and accurate digital image, and the D L P projector has high definition, homogeneous picture, sharp color, fine and natural fidelity, high brightness, capacity of zooming and convenient regulation.

The working principle of the D L P projector is that the light beam emitted from the light source is filtered into red, green and blue colors by the rotating color wheel module and then transmitted to the display module to be converted into an image beam, and the image beam is projected on the screen by the projection lens to form a picture, thereby providing a very good visual effect for the viewer.

The color wheel module, especially the color wheel module, needs to be protected from dust to maintain brightness, and the conventional method is to seal the color wheel module simply, and provide a light inlet and a light outlet at positions corresponding to the color filters on the housing of the color wheel module, and the light inlet and the light outlet are provided with materials such as glass to seal the light inlet and the light outlet, but the light inlet and the light outlet are covered with glass to cause brightness reduction, thereby affecting the projection effect.

Therefore, there is a need for a new projector to overcome the above-mentioned drawbacks.

Disclosure of Invention

The invention aims to provide a projector, which does not need to provide a light inlet and a light outlet on a color wheel cover body and cover glass, thereby avoiding the reduction of brightness.

To achieve the above object, the present invention provides a projector, comprising,

a plurality of first optical elements for providing and/or propagating light;

the optical machine shell is used for arranging the plurality of first optical elements and is provided with a first cavity and a first opening, and the first cavity is communicated with the first opening;

the color wheel module is arranged at the first opening, and at least part of the color wheel module extends into the first cavity through the first opening;

the color wheel cover body is used for covering the color wheel module part exposed out of the first cavity and covering the first opening;

the part of the color wheel module extending into the optical machine shell is positioned on the transmission path of the light to perform wavelength conversion or light splitting on the light.

Preferably, when the first opening is sealed, the first cavity is sealed.

Preferably, the color wheel module includes a fixing portion, and when at least a portion of the color wheel module is located in the first cavity, the fixing portion and the color wheel cover cooperate with each other to cover the portion of the color wheel module exposed from the first cavity and to close the first opening.

Preferably, the color wheel further comprises a heat dissipation structure, and the heat dissipation structure is disposed on at least one of the optical machine housing, the color wheel cover and the fixing portion.

Preferably, the fixing portion has a guiding surface for guiding the color wheel cover, and when the color wheel module is located in the first accommodating space, the color wheel cover slides along the guiding surface relative to the optical engine casing until the color wheel cover and the fixing portion cover the first opening.

Preferably, the color wheel cover further includes a dustproof material, and when the color wheel cover covers the first opening, the dustproof material is located between the fixing portion and the optical machine casing, between the color wheel cover and the optical machine casing, and/or between the fixing portion and the color wheel cover.

Preferably, the optical engine housing includes a first portion and a second portion, the first portion is used for disposing at least one first optical element, the second portion is used for disposing at least one first optical element, and the color wheel module is used for receiving the light transmitted by the at least one first optical element of the first portion and transmitting the light to the first optical element of the second portion.

Preferably, the first portion has a first cavity, the second portion has a second cavity, the first cavity is located between the second cavity and the third cavity, and the first cavity, the second cavity and the third cavity are communicated and isolated from the outside.

Preferably, the first cavity is defined by a first sidewall, a second sidewall and a third sidewall, the first sidewall is located on the first portion, the second sidewall is located on the second portion, and the third sidewall is located at a connection position of the first portion and the second portion.

Preferably, the color wheel module has an incident end and an emergent end opposite to each other, the first sidewall has a first yielding space opposite to the incident end, the second sidewall has a second yielding space opposite to the emergent end.

Preferably, the first portion has at least one second opening, and each of the second openings is provided with one of the first optical elements to close at least one of the second openings; and/or the second part is provided with at least one third opening, and each third opening is provided with one first optical element respectively so as to seal at least one third opening.

Compared with the prior art, the invention provides a projector, which comprises a plurality of first optical elements, an optical machine shell, a color wheel module and a color wheel cover body, wherein the plurality of first optical elements are used for providing and/or transmitting light rays, the optical machine shell is used for arranging the plurality of first optical elements, the optical machine shell is provided with a first cavity and a first opening, the first cavity is communicated with the first opening, the color wheel module is arranged at the first opening, at least part of the color wheel module extends into the first cavity through the first opening, the color wheel cover body is used for covering the part of the color wheel module exposed out of the first cavity and covering the first opening, and the part of the color wheel module positioned in the first cavity is positioned on a transmission path of the light rays so as to carry out wavelength conversion or light splitting on the light rays. The color wheel module is directly combined with the optical machine shell, so that the color wheel module extending into the optical machine shell is positioned on a light transmission path, a light inlet and a light outlet do not need to be formed on the color wheel cover body, and the color wheel cover body is covered with transparent materials such as glass, and therefore, the design of the color wheel module can improve the light utilization rate and avoid the brightness reduction.

Drawings

FIG. 1 is an exploded view of a projector 100 according to an embodiment of the invention;

FIG. 2 is an assembled structural diagram of the components of the projector 100 of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a schematic view of the projector 100 of FIG. 1 in another orientation;

FIG. 5 is a schematic view of the projector 100 of FIG. 1 in another direction;

fig. 6 is a schematic structural diagram of the projector 100 of fig. 5 after assembling the components.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Certain terms are used throughout the description and following claims to refer to particular components. As one of ordinary skill in the art will appreciate, manufacturers may refer to a component by different names. The present specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to.

Referring to fig. 1 to 6, a schematic structural diagram of a projector according to a first embodiment of the invention is disclosed. FIG. 1 is an exploded view of a projector 100 according to an embodiment of the invention; FIG. 2 is an assembled structural diagram of the components of the projector 100 of FIG. 1; FIG. 3 is a schematic cross-sectional view taken along A-A of FIG. 2; FIG. 4 is a schematic view of the projector 100 of FIG. 1 in another orientation; FIG. 5 is a schematic view of the projector 100 of FIG. 1 in another direction; fig. 6 is a schematic structural diagram of the projector 100 of fig. 5 after assembling the components.

Referring to fig. 1 and 6, the projector 100 of the present invention includes a plurality of first optical elements (not shown), a light engine housing 11, a color wheel module 12, and a color wheel cover 13. The plurality of first optical elements are used for providing and/or transmitting light, and the plurality of first optical elements may be a light source, a lens, a mirror, a light uniformizing element, a light valve and/or a lens, but not limited thereto, which is determined by a designer according to an actual situation. The color wheel module 12 is a color wheel for splitting light by a filter thereof or a color wheel for converting wavelength, such as a laser fluorescent color wheel, which is determined by a designer according to actual situations and will not be described herein again.

The optical engine housing 11 is used for disposing the plurality of first optical elements, the optical engine housing 11 has a first cavity 113 and a first opening 114, the first cavity 113 is communicated with the first opening 114, the color wheel module 12 is disposed at the first opening 114, and at least a portion of the color wheel module 12 extends into the first cavity 113 through the first opening 114. The portion of the color wheel module 12 extending into the first cavity 113 is an effective portion for processing the light, such as a filter or a portion with phosphor.

The color wheel cover 13 is used for covering the portion of the color wheel module 12 exposed out of the first cavity 113 and covering the first opening 114.

The portion of the color wheel module 12 located in the first cavity 113 is located on a transmission path of the light to perform wavelength conversion or light splitting on the light. That is, the color wheel module 12 is inserted into the optical device housing 11, that is, the color wheel module 12 is directly combined with the optical device housing 11, so that the portion of the color wheel module 12 inserted into the optical device housing 11 is located on the light transmission path, and the color wheel cover 13 does not need to be provided with a light inlet and a light outlet, and is covered with a transparent material such as glass, and the light passes through the transparent material such as glass, so that part of the light is absorbed, refracted or scattered, and the like.

Further, when the first opening 114 is sealed, the first cavity 113 is sealed, so that the dust prevention of the color wheel module 12 can be achieved.

Further, as shown in fig. 1, fig. 5 and fig. 6, the color wheel module 12 includes a fixing portion 121, and when the color wheel module 12 is located in the first cavity 113, the fixing portion 121 and the color wheel cover 13 cooperate with each other to cover the first opening 114, so as to seal the first opening 114, but not limited thereto.

Further, as shown in fig. 1, the fixing portion 121 has a guiding surface 1210 for guiding the color wheel cover 13, when the color wheel module 12 is located in the first accommodating space 111, the color wheel cover 13 slides along the guiding surface 1210 until the color wheel cover 13 and the fixing portion 121 cover the first opening 114, that is, the color wheel cover 13 and the fixing portion 121 are in sliding fit, which is not limited to this, and specifically determined by a designer according to actual situations, and is not described herein again.

In practical applications, as shown in fig. 1, the projector 100 further includes a heat dissipation structure 14, and the heat dissipation structure 14 is disposed on at least one of the optical engine housing 11, the color wheel cover 13, and the fixing portion 121 or a combination thereof to dissipate heat, so as to facilitate good operation of the projector 100.

In order to achieve the dustproof effect, as shown in fig. 1, the projector 100 of the present invention further includes a dustproof material 15, and when the color wheel cover 13 covers the first opening 114, the dustproof material 15 is located between the fixing portion 121 and the optical device housing 11, between the color wheel cover 13 and the optical device housing 11, and/or between the fixing portion 121 and the color wheel cover 13, but not limited thereto.

Further, as shown in fig. 1, the optical device housing 11 includes a first portion 111 and a second portion 112, the first portion 111 is used for disposing at least one first optical element, the second portion 112 is used for disposing at least one first optical element, and the color wheel module 12 is used for receiving the light transmitted by the at least one first optical element of the first portion 111 and transmitting the light to the first optical element of the second portion 112.

Further, the first portion 111 has a second cavity 1110, the second portion 112 has a third cavity 1120, the first cavity 113 is located between the second cavity 1110 and the third cavity 1120, and the first cavity 113, the second cavity 1110 and the third cavity 1120 are communicated and isolated from the outside, so as to play a role of dust prevention.

Further, referring to fig. 1, the optical engine housing 11 includes a plurality of first sidewalls 115, the plurality of first sidewalls 115 surround to form the first cavity 113, the plurality of first sidewalls 115 are partially located on the first portion 111, and the plurality of first sidewalls 115 are partially located on the second portion 112.

Referring to fig. 1, in the present embodiment, the first cavity 113 is defined by a first sidewall 115, a second sidewall 116 and a third sidewall 117, wherein the first sidewall 115 is located on the first portion 111, the second sidewall 116 is located on the second portion 112, and the third sidewall 117 is located at a connection position of the first portion 111 and the second portion 112. In this embodiment, the first sidewall 115 is a plane, the second sidewall 116 is a plane, and the third sidewall 117 is a curved surface, preferably, the shape of the third sidewall 117 matches the arc shape of the color wheel module 12, which is determined by the designer according to the actual situation, and is not described herein again.

Further, as shown in fig. 1, the color wheel module 12 has an incident end 122 and an emergent end 123 opposite to each other, a first yielding space 1151 is provided on the first sidewall 115, the first yielding space 1151 is opposite to the incident end 122, a second yielding space 1161 is provided on the second sidewall 116 (see fig. 5), the second yielding space 1161 is opposite to the emergent end 123, light transmitted by at least one first optical element disposed on the first portion 111 is incident to the color wheel module 12 through the first yielding space 1151, and light passing through the color wheel module 12 is transmitted to a first optical element of the second portion 112 through the second yielding space 1161. The size and shape of the first yielding space 1151 and the second yielding space 1161 are determined by the light passing therethrough, such as circular shape, which is determined by the designer according to the actual situation, and will not be described herein again.

Further, the first portion 111 has at least one second opening 1111, and each of the second openings 1111 is provided with a first optical element to close the at least one second opening 1111. The first optical element disposed in the first portion 111 may be a light source, a lens, a light uniformizing element or a reflecting element, which is determined by a designer according to actual circumstances. In this embodiment, the first portion 111 has a plurality of second openings 1111, and the plurality of second openings 1111 are disposed adjacent to or opposite to each other, but not limited thereto.

Further, the light source is disposed outside the first portion 111, and light provided by the light source is incident into the first cavity 113 through a first optical element disposed on the first portion 111, for example, but not limited to, a lens or a light pipe. Alternatively, one of the first optical elements disposed on the first portion 111 is a light source, and the light source provides light.

Further, as shown in fig. 1 and 5, the second portion 112 has at least one third opening 1121, and each of the third openings 1121 is provided with a first optical element to close the at least one third opening 1121. Specifically, according to an actual situation, a designer determines that the first optical element disposed on the second portion 112 may be a lens, a light valve, a reflective element or a reflective element, and in this embodiment, the second portion 112 has three third openings 1121, wherein two of the third openings 1121 are disposed adjacent to or opposite to each other, but not limited thereto, and the designer determines that the first optical element is determined according to the actual situation.

Of course, in other embodiments, the first portion 111 may not have the second cavity 1110, for example, the first sidewall 115 is disposed on the first sidewall 115 or disposed in the first cavity 113, and the designer may determine the first optical element disposed on the first portion 111 according to actual situations, for example, the number and type of the first optical elements disposed on the first portion 111 and/or the size and the accommodating space of the projector, which is not described herein again. In another embodiment, the second portion 112 may not have the third cavity 1120, for example, the second sidewall 116, and the first optical element disposed on the second portion 112 is disposed on the second sidewall 116 or disposed in the first cavity 113, but not limited thereto, and the designer may determine the second portion 112 according to the actual situation, for example, the number and the type of the first optical element disposed on the second portion 112 and/or the size and the accommodating space of the projector, which is not described herein again.

In summary, the present invention provides a projector, including a plurality of first optical elements, an optical device housing, a color wheel module, and a color wheel cover, wherein the plurality of first optical elements are used for providing and/or transmitting light, the optical device housing is used for disposing the plurality of first optical elements, the optical device housing has a first cavity and a first opening, the first cavity is communicated with the first opening, the color wheel module is disposed at the first opening, and at least a portion of the color wheel module extends into the first cavity through the first opening, the color wheel cover is used for covering the portion of the color wheel module exposed out of the first cavity and covering the first opening, wherein the portion of the color wheel module extending into the first cavity is located on a transmission path of the light to perform wavelength conversion or light splitting on the light, i.e. the color wheel module of the present invention is directly combined with the optical device housing, so that the portion of the color wheel module extending into the optical device housing is located on the transmission path of the light, a decrease in brightness can be avoided.

The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.

Claims

1. A projector is characterized by comprising,

a plurality of first optical elements for providing and/or propagating light;

the part of the color wheel module extending into the optical machine shell is positioned on the transmission path of the light ray so as to carry out wavelength conversion or light splitting on the light ray;

when at least part of the color wheel module is positioned in the first cavity, the fixing part and the color wheel cover body are matched with each other to cover the color wheel module part exposed out of the first cavity and seal the first opening, so that the dust prevention of the color wheel module is realized; the fixing portion has a guiding surface for guiding the color wheel cover, and when the color wheel module is located in the first cavity, the color wheel cover slides along the guiding surface relative to the optical engine casing until the color wheel cover and the fixing portion cover the first opening.

2. The projector as defined in claim 1 wherein the first cavity is sealed when the first opening is sealed.

3. The projector as claimed in claim 1, further comprising a heat dissipation structure disposed on at least one of the optical engine housing, the color wheel cover and the fixing portion.

4. The projector as claimed in claim 1, further comprising a dust-proof material, wherein when the color wheel cover covers the first opening, the dust-proof material is located between the fixing portion and the optical engine housing, between the color wheel cover and the optical engine housing, and/or between the fixing portion and the color wheel cover.

5. The projector as claimed in claim 1, wherein the optical engine housing includes a first portion and a second portion, the first portion is used for disposing at least one first optical element, the second portion is used for disposing at least one first optical element, and the color wheel module is used for receiving the light transmitted from the at least one first optical element of the first portion and transmitting the light to the first optical element of the second portion.

6. The projector as claimed in claim 5, wherein the first portion has a second cavity, the second portion has a third cavity, the first cavity is disposed between the second cavity and the third cavity, and the first cavity, the second cavity and the third cavity are connected and isolated from the outside.

7. The projector as defined in claim 5 wherein the first chamber is defined by a first sidewall, a second sidewall and a third sidewall, the first sidewall being located on the first portion, the second sidewall being located on the second portion, the third sidewall being located at a junction of the first portion and the second portion.

8. The projector as claimed in claim 7, wherein the color wheel module has an opposite light-in end and a light-out end, the first sidewall has a first space, the first space is opposite to the light-in end, the second sidewall has a second space, and the second space is opposite to the light-out end.

9. The projector as claimed in claim 5, wherein the first portion has at least one second opening, and each of the second openings is provided with one of the first optical elements to close at least one of the second openings; and/or the second part is provided with at least one third opening, and each third opening is respectively provided with one first optical element so as to seal at least one third opening.