CN111487838B

CN111487838B - Projector and projector

Info

Publication number: CN111487838B
Application number: CN201910079873.9A
Authority: CN
Inventors: 洪孟助; 何昆山
Original assignee: Coretronic Corp
Current assignee: Coretronic Corp
Priority date: 2019-01-28
Filing date: 2019-01-28
Publication date: 2022-01-18
Anticipated expiration: 2039-01-28
Also published as: CN111487838A

Abstract

The invention provides a projection device and a projector. The projection device comprises an optical machine module, a lens module and a buffer layer. The optical-mechanical module is used for generating an image light beam. The lens module is located on a transmission path of the image light beam. The buffer layer is arranged between the optical machine module and the lens module and is provided with at least two openings. The lens module is connected to the optical-mechanical module by the buffer layer. At least two openings of the buffer layer define at least one air flow channel between the optical machine module and the lens module. The projection device and the projector using the same provided by the invention have better heat dissipation effect and display quality.

Description

Projector and projector

Technical Field

The present invention relates to an optical device, and more particularly, to a projection device and a projector using the same.

Background

Generally, a lens module of a projector needs to have focusing and translating functions, so that an accommodating space is needed between the lens module and an optical module, and a part of the lens module extends into the optical module. When the projector operates, the light beam of the light source of the projector continuously irradiates to generate heat, and the lens absorbs the heat to generate thermal expansion, so that the focal distance of the projector is deviated. When the focus offset is too large, the image projected by the lens is blurred and unclear, which is called thermal drift (thermal drift). The heat energy generated by the optical-mechanical module at least affects the lens module inserted into the optical-mechanical module, so that the lens module generates a heat drift phenomenon due to the thermal deformation of part of lenses of the lens module, and the display quality of the projector is not as good as expected.

The background section is only used for illustrating the invention, and therefore the disclosure in the background section may include some known techniques which are not known to those skilled in the art. The statements in the "background" section do not represent that matter or the problems which may be solved by one or more embodiments of the present invention, but are known or appreciated by those skilled in the art before filing the present application.

Disclosure of Invention

The invention aims at a projection device which can have a better heat dissipation effect.

The invention is directed to a projector, which comprises the projection device and has better display quality.

Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.

In order to achieve one or a part of or all of the above objectives or other objectives, an embodiment of the invention provides a projection apparatus including an optical module, a lens module, and a buffer layer. The optical-mechanical module is used for generating an image light beam. The lens module is located on a transmission path of the image light beam. The buffer layer is arranged between the optical machine module and the lens module and is provided with at least two openings. The lens module is connected to the optical-mechanical module by the buffer layer. At least two openings of the buffer layer define at least one air flow channel between the optical machine module and the lens module.

To achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a projector, which includes an illumination module, an optical-mechanical module, a lens module, and a buffer layer. The illumination module is used for generating an illumination light beam. The optical-mechanical module is positioned on the transmission path of the illumination light beam and generates an image light beam by utilizing the illumination light beam. The lens module is located on a transmission path of the image light beam. The buffer layer is arranged between the optical machine module and the lens module and is provided with at least two openings. The lens module is connected to the optical-mechanical module by the buffer layer. At least two openings of the buffer layer define at least one air flow channel between the optical machine module and the lens module.

Based on the above, the embodiments of the invention have at least one of the following advantages or efficacies. In the design of the projection apparatus according to an embodiment of the invention, the buffer layer is disposed between the optical mechanical module and the lens module, and the at least two openings of the buffer layer define at least one air flow channel between the optical mechanical module and the lens module. The heat generated by the continuous irradiation of the light beam of the light source and the heat generated by the elements such as the fluorescent powder wheel in the optical-mechanical module can be discharged from the air flow channel at least in a natural convection mode, so that the phenomenon of heat drift generated by the lens module can be avoided. In short, the projection apparatus of an embodiment of the invention can have a better heat dissipation effect, and the projector using the projection apparatus can have a better display quality.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

Fig. 1A is a schematic cross-sectional view of a projector according to an embodiment of the invention;

FIG. 1B is a perspective view of a projection device of the projector of FIG. 1A;

FIG. 1C is an exploded perspective view of a projection device of the projector of FIG. 1A;

fig. 2A is an exploded perspective view of a projection apparatus according to an embodiment of the invention;

FIG. 2B is a schematic cross-sectional view of the projection apparatus shown in FIG. 2A;

fig. 3A is an exploded perspective view of a projector according to another embodiment of the invention;

fig. 3B is a schematic exploded perspective view of a projector according to another embodiment of the invention.

Detailed Description

The foregoing and other technical and scientific aspects, features and utilities of the present invention will be apparent from the following detailed description of a preferred embodiment when read in conjunction with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings.

Fig. 1A is a schematic cross-sectional view of a projector according to an embodiment of the invention. Fig. 1B is a perspective view of a projection device of the projector of fig. 1A. Fig. 1C is a schematic perspective exploded view of a projection device of the projector of fig. 1A. Referring to fig. 1A, fig. 1B and fig. 1C, in the present embodiment, the projector 10 includes a projection device 100a and an illumination module 200. The projection apparatus 100a includes an optical module 110, a lens module 120, and a buffer layer 130 a. The illumination module 200 includes a light source for generating an illumination beam, and the optical-mechanical module 110 of the projection apparatus 100a is located on a transmission path of the illumination beam, and the optical-mechanical module 110 includes at least one light valve for converting the illumination beam into an image beam with image information. The lens module 120 is located on a transmission path of the image beam and projects the image beam onto a screen or a wall surface to form an image. The buffer layer 130a is disposed between the optical-mechanical module 110 and the lens module 120, and has at least two openings (two

openings

132a and 134a are schematically illustrated in fig. 1C). The lens module 120 is connected to the optical-mechanical module 110 by the buffer layer 130a in an interference fit manner, and the lens module 120 is connected to the optical-mechanical module 110 by the buffer layer 130a in an interference fit manner, for example, but the invention is not limited thereto. The

openings

132a, 134a of the buffer layer 130a define at least one air flow channel (fig. 1A schematically illustrates an air flow channel T) between the optical module 110 and the lens module 120. Here, the interference fit (also referred to as interference fit) means that the fitting is forced by a certain degree of pressure when the fitting is made with a certain degree of interference, and the two components are integrated with each other after the fitting, and are difficult to remove, and thus, the fitting becomes permanent.

In detail, the lens module 120 of the present embodiment includes a lens translation module 122 and a lens 124. The lens translation module 122 is connected to the optical-mechanical module 110 by the buffer layer 130a and has an assembly hole 123, and the lens translation module 122 is connected to the optical-mechanical module 110 by the buffer layer 130a, for example, in an interference fit manner, which is not limited in the present invention. The lens 124 is assembled on the lens translation module 122 through the assembly hole 123. Furthermore, the lens translation module 122 of the present embodiment includes a vertical adjustment mechanism 125 and a horizontal adjustment mechanism 127, wherein the position of the lens 124 can be adjusted by the vertical adjustment mechanism 125 and the horizontal adjustment mechanism 127. It should be noted that in other embodiments not shown, the optical-mechanical module may include a horizontal adjustment mechanism. That is, the horizontal adjustment mechanism can be selectively disposed on the optical module or the lens translation module, which is not limited herein.

In addition, the

openings

132a and 134a of the buffer layer 130a of the present embodiment include at least one air inlet (fig. 1C schematically illustrates an air inlet 132a) and at least one air outlet (fig. 1C schematically illustrates an air outlet 134 a). Here, the aperture H1 of the opening 132a may be the same as or different from the aperture H2 of the opening 134a, and is not limited thereto. The air flow enters the projection apparatus 100a from the air inlet 132a, passes through the air flow channel T, and flows out of the projection apparatus 100a from the air outlet 134a, so as to dissipate heat of the projection apparatus 100a in a natural convection manner. More specifically, the buffer layer 130a includes an upper side 131a and a lower side 133a opposite to each other, wherein the air inlet 132a is located at the lower side 133a, and the air outlet 134a is located at the upper side 131a, so as to have a better heat dissipation effect.

Preferably, the buffer layer 130a of the embodiment is disposed on the optical module 110, the lens translation module 122 of the lens module 120 is connected to the optical module 110 through the buffer layer 130a, and the lens translation module 122 is connected to the optical module 110 through the buffer layer 130a, for example, in an interference fit manner, which is not limited in the invention. Here, the buffer layer 130a is disposed for dust prevention, and an air outlet channel T may be defined between the optical module 110 and the lens module 120, so as to achieve a heat dissipation effect by convection. The buffer layer 130a is made of a non-thermal conductive material, such as foam or rubber, and can be disposed on the optical module 110 by being adhered, and the buffer layer 130a is made of a non-thermal conductive material, so that heat on the optical module 110 can be prevented from being conducted to the lens module 120. The buffer layer 130a is a single-body element having the

openings

132a, 134a, or a plurality of segment elements arranged to have the

openings

132a, 134a, which is not limited herein.

In this or other embodiments, the lighting module may include one or more solid state illumination sources, for example. The solid-state light source may include Light Emitting Diodes (LEDs) or laser units, for example, arranged in an array, and the laser units may be Laser Diodes (LDs), for generating the illumination light beams, but the invention is not limited thereto. In other embodiments, the lighting module may also include an incandescent lamp, a halogen bulb, or a gas discharge lamp.

In this embodiment or other embodiments, the optical-mechanical module may be located on a transmission path of the illumination beam, and generate the image beam by using the illumination beam. For example, the opto-mechanical module may include a plurality of optical elements for reflecting, projecting and/or changing the wavelength and direction of transmission of the illumination beam. The opto-mechanical module may include elements to split the illumination beam or other beams, such as dichroic mirrors (dichroic mirrors) or the like. The optical engine module may also include a wavelength conversion device that changes the wavelength of the light beam impinging thereon. For example, the phosphor wheel is composed of a phosphor and a turntable, and the rotation of the turntable causes the phosphor coated on the turntable to be located on the transmission path of the incident light beam, but the invention is not limited thereto.

In this embodiment or other embodiments, the lens translation module may include a vertical adjustment mechanism and/or a horizontal adjustment mechanism. For example, the vertical adjustment mechanism or the horizontal adjustment mechanism may comprise a drive element and a guide rail, by means of which at least a part of the lens may be moved in the direction of the guide rail or rails. The driving element may be, for example, a motor, although the invention is not limited thereto.

In the design of the projection apparatus 100a of the embodiment, the buffer layer 130a is disposed between the optical module 110 and the lens module 120, and the

openings

132a and 134a of the buffer layer 130a define the airflow channel T between the optical module 110 and the lens module 120. The heat generated by the continuous irradiation of the light beam of the light source and the heat generated by the components inside the optical-mechanical module, such as the fluorescent powder wheel, can be discharged from the air flow channel T at least in a natural convection manner, so that the phenomenon of thermal drift of the lens module 120 can be avoided. In short, the projection apparatus 100a of the present embodiment has a better heat dissipation effect, and the projector 10 using the projection apparatus 100a has a better display quality.

It should be noted that the following embodiments follow the reference numerals and parts of the contents of the foregoing embodiments, wherein the same reference numerals are used to indicate the same or similar elements, and the description of the same technical contents is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

Fig. 2A is a schematic exploded perspective view of a projection apparatus according to an embodiment of the invention. Fig. 2B is a schematic cross-sectional view of the projection apparatus in fig. 2A. Referring to fig. 1C, fig. 2A and fig. 2B, a projection apparatus 100B of the present embodiment is similar to the projection apparatus 100a of fig. 1C, and the difference between the two embodiments is: the projection apparatus 100b of the present embodiment further includes a heat dissipation module 140 connected to one of the

openings

132b, 134b of the buffer layer 130b, and the opening 132b is defined as an air inlet. Here, the heat dissipation module 140 includes an air duct 142 and a fan 144, wherein the air duct 142 is connected to the opening 132b as an air inlet, and the fan 144 is connected to the air duct 142. Here, the fan 144 is, for example, a blower (blower), but is not limited thereto.

More specifically, the air duct 142 of the heat sink module 140 has a first connecting hole 142a and a second connecting hole 142B (shown in fig. 2B), wherein the first connecting hole 142a is connected to the opening 132B as the air inlet, and the second connecting hole 142B is connected to the fan 144. At this time, the lens translation module 122 of the lens module 120 and the optical-mechanical module 130 clamp the air duct 142 of the heat dissipation module 140, and fix the heat dissipation module 140. Here, the aperture W1 of the first connection end hole 142a of the air duct 142 is smaller than the aperture W2 of the second connection end hole 142b, but is not limited thereto. In other embodiments not shown, the aperture of the first connecting terminal hole may be larger than or equal to the aperture of the second connecting terminal hole, which still falls within the protection scope of the present invention.

Since the projection apparatus 100b of the present embodiment further includes the heat dissipation module 140, heat dissipation can be performed by using natural convection, and heat dissipation can be performed by using forced convection through the fan 144. In this way, the heat generated by the optical-mechanical module 110 can be exhausted from the airflow channel T by natural convection and/or forced convection, so as to avoid the heat drift of the lens module 120. In short, the projection apparatus 100b of the present embodiment has a better heat dissipation effect.

It should be noted that the number and the arrangement positions of the

openings

132a, 134a (or 132b, 134b) of the buffer layer 130a (or 130b) are not limited by the present invention.

Fig. 3A is an exploded perspective view of a projector according to another embodiment of the invention. Referring to fig. 2A and fig. 3A at the same time, the projection apparatus 100c of the present embodiment is similar to the projection apparatus 100b of fig. 2A, and the difference between the two embodiments is: the buffer layer 130c of the projection apparatus 100c of the embodiment has three

openings

132c, 134c, 136c, i.e. an air inlet 132c and two

air outlets

134c, 136c separated from each other, and the air inlet 132c and the

air outlets

134c, 136c define two air flow channels T1, T2. Here, the air inlet 132c is located at the lower side 133c, and the

air outlets

134c, 136c are located at the upper side 131 c.

Fig. 3B is a schematic exploded perspective view of a projector according to another embodiment of the invention. Referring to fig. 2A and fig. 3B, a projection apparatus 100d of the present embodiment is similar to the projection apparatus 100B of fig. 2A, and the difference between the two embodiments is: the buffer layer 130d of the projection apparatus 100d of the embodiment has four

openings

132d, 134d, 136d, and 138d, i.e. an air inlet 132d and three

air outlets

134d, 136d, and 138d separated from each other, and the air inlet 132d and the

air outlets

134d, 136d, and 138d define three air flow channels T1 ', T2 ', and T '. The cushioning layer 130d further includes a first side edge 135d and a second side edge 137d located between the upper side edge 131d and the lower side edge 133d, connected to the upper side edge 131d and the lower side edge 133d, and opposite to each other. The air inlet 132d is located at the lower side 133d, and the

air outlets

134d, 136d, 138d are located at the first side 135d, the second side 137d, and the upper side 131d, respectively.

In other embodiments, the openings of the buffer layer may be designed according to the use requirement, such that at least one air inlet of the buffer layer may be located at the lower side, and at least one air outlet may be located at the upper side, the first side, and/or the second side, to achieve the best heat dissipation effect.

In summary, the embodiments of the invention have at least one of the following advantages or effects. In an embodiment of the projection apparatus of the invention, the buffer layer is disposed between the optical mechanical module and the lens module, and the at least two openings of the buffer layer define at least one air flow channel between the optical mechanical module and the lens module. The heat energy in the optical module can be discharged from the airflow channel at least through natural convection, so that the phenomenon of heat drift generated by the lens module can be avoided. In another embodiment of the invention, the projection apparatus may further include a heat dissipation module, which can dissipate heat by natural convection and also can dissipate heat by forced convection through a fan. In short, the projection apparatus of an embodiment of the invention can have a better heat dissipation effect, and the projector using the projection apparatus can have a better display quality.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, which is defined by the claims and the description of the invention, and all simple equivalent changes and modifications made therein are also within the scope of the invention. Furthermore, it is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. In addition, the abstract and the title of the invention are provided for assisting the patent search and are not intended to limit the scope of the invention. Furthermore, the terms "first," "second," and the like in the claims are used merely to name elements (elements) or to distinguish between different embodiments or ranges, and are not used to limit upper or lower limits on the number of elements.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

The reference numbers illustrate:

10: a projector;

100a, 100b, 100c, 100 d: a projection device;

110: an opto-mechanical module;

120: a lens module;

122: a lens translation module;

123: assembling holes;

124: a lens;

125: a vertical adjustment mechanism;

127: a horizontal adjustment mechanism;

130a, 130b, 130c, 130 d: a buffer layer;

131a, 131c, 131 d: an upper side edge;

132a, 132b, 132c, 132 d: an opening/tuyere;

133a, 133c, 133 d: a lower side edge;

134a, 134b, 134c, 134d, 136c, 136d, 138 d: an opening/outlet;

135 d: a first side edge;

137 d: a second side edge;

140: a heat dissipation module;

142: an air duct;

142 a: a first connection end hole;

142 b: a second connection end hole;

144: a fan;

200: a lighting module;

h1, H2, W1, W2: the diameter of the hole;

t, T ', T1, T1 ', T2, T2 ': an air flow channel.

Claims

1. The utility model provides a projection device, its characterized in that includes ray apparatus module, camera lens module and buffer layer, wherein:

the optical-mechanical module is used for generating an image light beam;

the lens module is positioned on a transmission path of the image light beam; and

the buffer layer is arranged between the optical-mechanical module and the lens module and is provided with at least two openings, wherein the lens module is connected to the optical-mechanical module through the buffer layer, and at least one airflow channel is defined between the optical-mechanical module and the lens module by the at least two openings of the buffer layer.

2. The projection device of claim 1, wherein the at least two openings comprise at least one air inlet and at least one air outlet, and wherein the air flow enters the projection device from the at least one air inlet, passes through the at least one air flow channel, and exits the projection device from the at least one air outlet.

3. The projection device of claim 2, wherein the buffer layer includes an upper side and a lower side opposite to each other.

4. The projection device of claim 3, wherein the at least one air inlet is located at the lower side and the at least one air outlet is located at the upper side.

5. The projection apparatus as claimed in claim 4, wherein the at least one air inlet is one air inlet, the at least one air outlet is two air outlets separated from each other, and the one air inlet and the two air outlets define two air flow channels.

6. The projection apparatus of claim 3, wherein the buffer layer further comprises a first side and a second side located between the upper side and the lower side, connected to the upper side and the lower side, and opposite to each other.

7. The projection device of claim 6, wherein the at least one air inlet is located at the lower side, and the at least one air outlet is located at the upper side, the first side, and/or the second side.

8. The projection apparatus of claim 1, wherein the lens module is connected to the opto-mechanical module by the buffer layer in an interference fit manner.

9. The projection device of claim 1, further comprising:

the heat dissipation module is connected with one of the at least two openings and defines the at least two openings as an air inlet.

10. The projection device of claim 9, wherein the heat dissipation module comprises:

an air duct connected to the air inlet; and

a fan connected to the air duct.

11. The projection apparatus as claimed in claim 10, wherein the air duct has a first connection port hole and a second connection port hole, the first connection port hole is connected to the air inlet, the second connection port hole is connected to the fan, and the first connection port hole and the second connection port hole have the same or different aperture.

12. The projection device of claim 1, wherein the apertures of the at least two openings are the same or different.

13. The projection device of claim 1, wherein the lens module comprises:

the lens translation module is connected to the optical-mechanical module through the buffer layer and is provided with an assembling hole; and

and the lens penetrates through the assembling hole to be assembled on the lens translation module.

14. The projection apparatus of claim 13, wherein the lens translation module is connected to the opto-mechanical module by the buffer layer in an interference fit manner.

15. The projection apparatus of claim 13, wherein the lens translation module comprises a vertical adjustment mechanism and a horizontal adjustment mechanism, and the position of the lens is adjusted by the vertical adjustment mechanism and the horizontal adjustment mechanism.

16. The projection device of claim 1, wherein the material of the buffer layer comprises foam or rubber.

17. The projection device of claim 1, wherein the buffer layer is a unitary element provided with the at least two openings or is a plurality of segmented elements arranged with the at least two openings.

18. A projector, comprising an illumination module and a projection device, wherein:

the illumination module is used for generating an illumination light beam; and

projection arrangement includes ray apparatus module, camera lens module and buffer layer, wherein:

the optical-mechanical module is positioned on a transmission path of the illumination light beam and used for converting the illumination light beam into an image light beam;

19. The projector as claimed in claim 18, wherein the at least two openings include at least one air inlet and at least one air outlet, and the air flow enters the projector through the at least one air inlet, passes through the at least one air flow channel, and exits the projector through the at least one air outlet.

20. The projector of claim 19, wherein the buffer layer includes an upper side and a lower side opposite each other.

21. The projector as claimed in claim 20, wherein the at least one air inlet is located at the lower side and the at least one air outlet is located at the upper side.

22. The projector as claimed in claim 21, wherein the at least one air inlet is one air inlet, the at least one air outlet is two air outlets separated from each other, and the one air inlet and the two air outlets define two air flow channels.

23. The projector as claimed in claim 20, wherein the buffer layer further comprises a first side and a second side opposite to each other and connected to the upper side and the lower side between the upper side and the lower side.

24. The projector as claimed in claim 23, wherein the at least one air inlet is located at the lower side, and the at least one air outlet is located at the upper side, the first side, and/or the second side.

25. The projector as claimed in claim 18, wherein the lens module is connected to the opto-mechanical module by the buffer layer in an interference fit manner.

26. The projector as claimed in claim 18, further comprising:

27. The projector of claim 26, wherein the heat dissipation module comprises:

an air duct connected to the air inlet; and

a fan connected to the air duct.

28. The projector as claimed in claim 27, wherein the duct has a first connecting end hole and a second connecting end hole, the first connecting end hole is connected to the air inlet, the second connecting end hole is connected to the fan, and the first connecting end hole and the second connecting end hole have the same or different diameters.

29. The projector as defined in claim 18 wherein the apertures of the at least two openings are the same or different.

30. The projector of claim 18, wherein the lens module comprises:

the lens translation module is connected to the optical-mechanical module by the buffer layer and is provided with an assembling hole; and

31. The projector as claimed in claim 30, wherein the lens translation module is connected to the opto-mechanical module by the buffer layer in an interference fit manner.

32. The projector as claimed in claim 30, wherein the lens translation module includes a vertical adjustment mechanism and a horizontal adjustment mechanism, and the position of the lens is adjusted by the vertical adjustment mechanism and the horizontal adjustment mechanism.

33. The projector as claimed in claim 18, wherein the buffer layer is made of foam or rubber.

34. The projector as claimed in claim 18, wherein the buffer layer is a single element provided with the at least two openings or a plurality of segmented elements arranged to have the at least two openings.