WO2018028262A1

WO2018028262A1 - Colour wheel module, light source module and projection system

Info

Publication number: WO2018028262A1
Application number: PCT/CN2017/084840
Authority: WO
Inventors: 谢涛; 周正平; 李屹
Original assignee: 深圳市绎立锐光科技开发有限公司
Priority date: 2016-08-10
Filing date: 2017-05-18
Publication date: 2018-02-15
Also published as: CN206057778U

Abstract

Disclosed are a colour wheel module, a light source module and a projection system. The colour wheel module comprises a colour wheel (10), a colour wheel housing (11) and a first heat dissipation part (12). The colour wheel (10) is sealed within the colour wheel housing (11); a first portion (120) of the first heat dissipation part (12) is provided in the interior of the colour wheel housing (11), and two ends of the first portion (120) are respectively sealed and fixed on the colour wheel housing (11); a second portion (121) of the first heat dissipation part (12) extends from one end of the first portion (120) to the exterior of the colour wheel housing (11); heat of the first portion (120) is conducted to the second portion (121), so as to conduct the heat of the interior of the colour wheel housing (11) to the exterior of the colour wheel housing (11); the colour wheel (10) comprises a colour wheel shaft (101) and a colour wheel disc (100); the first portion (120) is in the shape of a straight bar and is limited in a position close to the colour wheel shaft (101); and since the second portion (121) is not restricted by the volume of the colour wheel housing (11), the heat dissipation capability of the first heat dissipation part (12) can be improved by means of increasing the volume of the second portion (121).

Description

Color wheel module, light source module and projection system

Technical field

The utility model relates to the field of projection technology, and in particular to a color wheel module, a light source module and a projection system.

Background technique

For projection equipment, the color wheel is an integral part of separating and processing colors. After the excitation light emitted by the light source is incident on the color wheel, the wavelength conversion material on the color wheel is excited to generate a laser. Moreover, as the color wheel rotates, the wavelength conversion material in different regions of the color wheel is excited by laser light of different colors, such as red laser, green laser and blue laser, and the different colors of the laser can be used for synthesis. A beam of light projected by the image.

technical problem

However, in the process of exciting light to excite the wavelength converting material, not all of the energy is converted into a laser, but a part of the energy is converted into heat. Moreover, since the color wheel itself has a high dustproof requirement, in general, the color wheel is sealed inside the color wheel housing, which causes heat to be discharged, thereby accumulating in the color wheel housing, so that the color wheel The internal temperature of the housing is getting higher and higher, which in turn affects the conversion efficiency and service life of the color wheel.

Based on this, a color wheel module having a heat dissipating fin is disclosed in the prior art. As shown in FIG. 1 , the color wheel module includes a color wheel housing 1 and a color wheel 2 located inside the color wheel housing 1 . And heat dissipation fins 3 on the outer surface of the color wheel housing 1. Although the heat dissipating fins 3 can dissipate heat from the color wheel housing 1, the volume of the color wheel housing 1 is limited, so that the heat dissipating fins 3 have a small heat dissipating area and a poor heat dissipating capability.

Technical solution

In view of this, the present invention provides a color wheel module, a light source module, and a projection system to solve the problem of poor heat dissipation capability of the heat dissipation fins of the color wheel module in the prior art.

To achieve the above object, the present invention provides the following technical solutions:

a color wheel module comprising a color wheel, a color wheel housing and a first heat sink;

The color wheel is sealed in the color wheel housing;

a first portion of the first heat dissipating member is disposed inside the color wheel housing, and two ends of the first portion are respectively sealed and fixed on the color wheel housing;

a second portion of the first heat sink extends from an end of the first portion to an exterior of the color wheel housing, and heat of the first portion is conducted to the second portion to move the color wheel housing Internal heat is conducted to the outside of the color wheel housing;

The color wheel includes a color wheel shaft and a color wheel disc, and the first portion is in a straight strip shape at a position adjacent to the color wheel shaft.

Preferably, the distance between the first portion and the color wheel axis is greater than 0 and less than or equal to 5 mm.

Preferably, the first portion is parallel to the disk surface of the color wheel disc.

Preferably, the first portion is disposed adjacent to the color wheel disc.

Preferably, the distance between the first portion and the color wheel disc is greater than 0 and less than or equal to 5 mm.

Preferably, at least two pieces of the first heat dissipating members are parallel to each other, and the at least two first heat dissipating members are respectively disposed on two sides of the symmetry of the color wheel shaft.

Preferably, the first heat sink comprises at least one heat pipe.

Preferably, the first heat sink comprises a plurality of heat pipes disposed in close proximity.

Preferably, the two ends of the first portion respectively penetrate the color wheel housing and are sealingly welded to the color wheel housing.

Preferably, the method further includes:

a second heat sink located outside the color wheel housing, the second heat sink being thermally coupled to the second portion of the first heat sink.

Preferably, the second heat sink comprises a heat dissipation substrate and a plurality of sheet fins fixed on the heat dissipation substrate.

Preferably, the second portion of the first heat sink penetrates the plurality of sheet fins.

Preferably, the color wheel module further includes a fan, and the fan is located outside the color wheel housing for dissipating heat from the second heat dissipating member and the second portion.

Preferably, the color wheel further includes a filter wheel, the filter wheel and the color wheel are respectively disposed on two sides of the color wheel shaft, and the first portion of the first heat sink is located in the filter Within the gap between the wheel and the color wheel.

Preferably, at least one light-passing hole is disposed on the color wheel housing, and the light-passing hole is used for incident excitation light and/or outgoing laser light.

A light source module comprising a light source and a color wheel module, wherein the color wheel module is the color wheel module according to any one of the preceding claims, wherein the excitation light emitted by the light source is incident after passing through the color wheel housing The color wheel is applied to the laser beam for image projection.

A projection system comprising a light source module as described above.

Beneficial effect

Compared with the prior art, the technical solution provided by the utility model has the following advantages:

The color wheel module, the light source module and the projection system provided by the utility model, the first part of the first heat sink is disposed inside the color wheel housing, and the second part of the first heat sink is colored from the end of the first part The outer portion of the wheel housing extends, so that the heat generated by the color wheel inside the color wheel housing can be conducted to the first portion of the first heat sink through the air flow inside the color wheel housing, and the heat can be transmitted to the first portion through the first portion. a second part to conduct heat inside the color wheel housing to the outside of the color wheel housing; and, since the second portion is not limited by the volume of the color wheel housing, the present invention can increase the second part by The volume increases the heat dissipation capability of the first heat sink.

Moreover, since the first portion is in a straight strip shape and is located adjacent to the color wheel axis, even if the first portion is in close proximity to the color wheel shaft, the first portion does not easily collide with the high speed rotating color wheel shaft, thereby The stability of the color wheel work is guaranteed. Because the curled or bent first portion is more susceptible to deformation under the action of high temperature or severe impact, thereby interfering with the adjustment operation of the color wheel.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description It is merely an embodiment of the present invention, and those skilled in the art can obtain other drawings according to the provided drawings without any creative work.

1 is a schematic structural view of a conventional color wheel module;

2 is a schematic structural view of a color wheel module according to an embodiment of the present invention;

FIG. 3 is another schematic structural diagram of a color wheel module according to an embodiment of the present invention; FIG.

4 is a front cross-sectional view of a color wheel housing provided by an embodiment of the present invention;

Figure 5 is a side cross-sectional view of the color wheel housing provided by the embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

One embodiment of the present invention provides a color wheel module. As shown in FIGS. 2 and 3, the color wheel module includes a color wheel 10, a color wheel housing 11 and a first heat sink 12.

In the present embodiment, the color wheel 10 includes a color wheel 100 and a color wheel shaft 101. The color wheel 100 is in the shape of a disk, and the color wheel shaft 101 is disposed in a central region of the color wheel 100. In addition, the color wheel 10 further has a driving device (such as a motor or the like) for driving the rotation of the color wheel shaft 101. The driving device drives the color wheel disk 100 to rotate around the center of the circle by driving the color wheel shaft 101 to rotate the excitation light to the color wheel disk 100. Lasers of different colors are excited on different wavelength converting materials in different regions, for example, a red laser, a green laser, and a blue laser.

In this embodiment, the color wheel 10 is sealed in the color wheel housing 11 , and a surface of the color wheel housing 11 parallel to the color wheel disk 100 is provided with a light passing hole for the excitation light emitted from the light source to pass through the color wheel. The housing 11 is irradiated onto the color wheel disc 100 to excite a laser beam, wherein the laser light can be emitted to the outside of the color wheel housing 11 through an optical path, such as a light passing hole.

It should be noted that the light-passing holes on the color wheel housing 11 are sealedly connected with the light source module or other modules in the projection system, so that the color wheel module and the light source module or other modules in the projection system form a sealed cavity. To achieve the sealing and dustproof of the color wheel module. Alternatively, the light-transmitting material is directly disposed on the light-passing hole to separately seal the color wheel module, thereby achieving sealing and dustproofing of the color wheel module.

It should be noted that the color wheel 10 in this embodiment is a reflective color wheel. Based on this, as shown in FIG. 3, the side surface of the color wheel housing 11 parallel to the color wheel disc 100 is the front housing 110. The light-passing hole 1101 is provided. At this time, the excitation light enters the color wheel housing 11 from the light-passing hole 1101, and the laser light is also emitted from the light-passing hole 1101. Of course, the present invention is not limited thereto, and other implementations are For example, the color wheel 10 can also be a transmissive color wheel. Correspondingly, the two sides of the color wheel housing 11 and the color wheel disc 100 are respectively provided with a light-passing hole, that is, a light-passing hole is arranged on the front housing 110. A corresponding light-emitting hole is also disposed at a corresponding position on the rear casing 111. At this time, the excitation light enters from the light-passing hole in the front casing 110, and is emitted by the laser light from the light-passing hole on the rear casing 111. Here, the front case 110 and the rear case 111 are fixed by screws or the like to constitute the color wheel housing 11, and the front case 110 and the rear case 111 are sealed by the seal ring 112.

In this embodiment, the color wheel housing 11 is a heat dissipating material, so that the color wheel housing 11 itself can dissipate heat. Optionally, the color wheel housing 11 is made of metal, alloy or ceramic material, preferably a light alloy. The utility model is not limited to this. In addition, heat dissipation fins may also be disposed on the outer surface of the color wheel housing 11 in this embodiment in order to improve the heat dissipation capability of the color wheel housing 11 itself.

In this embodiment, the first heat dissipating member 12 includes a first portion 120 and a second portion 121. The first portion 120 is disposed inside the color wheel housing 11 , and the first portion 120 is disposed at a position adjacent to the color wheel shaft 101 in a straight strip shape. And the two ends of the first portion 120 are respectively sealed and fixed on the color wheel housing 11. Optionally, the distance between the first portion 120 and the color wheel shaft 101 in this embodiment is greater than 0, less than or equal to 5 mm. In this embodiment, one end of the second portion 121 is connected to one end of the first portion 120, and the second portion 121 extends from one end of the first portion 120 to the outside of the color wheel housing 11, that is, the second portion 121 is located in the color wheel housing. 11 outside.

Since the heat generated by the color wheel 10 is conducted to the first portion 120 through the air flow inside the color wheel housing 11, the heat of the first portion 120 is again conducted to the second portion 121 connected thereto, and thus, the first heat sink can be passed. The heat inside the color wheel housing 11 is conducted to the outside of the color wheel housing 11.

Moreover, since the first portion 120 is located adjacent to the color wheel shaft 101, it is advantageous not only for the first heat sink 12 to conduct heat of the color wheel 100 to the outside of the color wheel housing 11, but also to facilitate the first heat sink 12 The heat of the color wheel shaft 101 is conducted to the outside of the color wheel housing 11.

Further, since the first portion 120 is of a straight strip type, even when the first portion 120 and the color wheel shaft 101 are in close proximity, the first portion 120 does not easily collide with the high speed rotating color wheel shaft 101. On the contrary, if the first portion 120 is curled, the first portion 120 is more likely to undergo a large deformation in the event of an external force collision or the like, causing the first portion 120 to collide with the high speed rotating color wheel shaft 101.

In a specific embodiment of the present invention, the first portion 120 is disposed substantially parallel to the disk surface of the color wheel disc 100. Optionally, the first portion 120 is disposed adjacent to the color wheel disc 100, and the distance between the first portion 120 and the color wheel disc 100 is greater than 0, less than or equal to 5 mm. Based on this, the plurality of portions of the first portion 120 are kept at a small distance from the disk surface of the color wheel disc 100, so that the heat of the color wheel disc 100 can be maximized. Of course, the present invention is not limited thereto. In other embodiments, the first portion 120 may be inclined to the disk surface of the color wheel disc 100, but only the first portion 120 and the color wheel are disposed when tilted compared to the parallel arrangement. The closest portion of the disk surface of the disk 100 can effectively conduct heat of the color wheel 100, which is disadvantageous for heat dissipation of the color wheel 100.

In a specific embodiment of the present invention, the color wheel module includes at least two first heat dissipating members 12 respectively disposed on symmetric sides of the color wheel shaft 101. Optionally, the first heat sink 12 includes at least one heat pipe. Further, the first heat sink 12 includes a plurality of heat pipes disposed in close proximity. As shown in FIGS. 2 and 3, three straight-type heat pipes are located on one side of the color wheel shaft 101, and the other three straight-type heat pipes are located on the opposite side of the color wheel shaft 101. Among them, the heat pipe is a soaking element with thermal superconducting function, and its thermal conductivity is 20 times to 30 times that of pure copper, which realizes thermal superconductivity through phase change of internal liquid. Moreover, the heat pipes are mostly copper pipes for production processing and shaping. Based on this, the use of the heat pipe as the first heat sink 12 not only improves the heat dissipation capability of the first heat sink 12, but also facilitates the design of the internal structure of the projection device and reduces the internal space of the projection device.

In this embodiment, the two ends of the first portion 120 respectively penetrate the color wheel housing 11 and are sealed and welded with the color wheel housing 11 . Specifically, as shown in FIG. 2, the first side surface of the color wheel housing 11 in this embodiment has an opening (not shown) and a first cover 113 that seals the opening. Based on this, the first heat sink The first portion 120 of the 12 may extend through the first cover plate 113 and extend through the opening to the interior of the color wheel housing 11. The first side is a side surface of the color wheel housing 11 and the color wheel 100. Further, the first cover plate 113 is made of a heat dissipating material, for example, a metal or ceramic material to dissipate heat from the first heat dissipating member 12. In addition, a first gasket 114 is further disposed between the first cover plate 113 and the color wheel housing 11 to ensure the sealing degree of the color wheel housing 11 and prevent dust or the like from entering the interior of the color wheel housing 11.

On the basis of the above embodiment, the second side surface of the color wheel housing 11 in the embodiment has at least one limiting hole and a second cover plate 115 sealing the at least one limiting hole, wherein the second side is The side opposite the first side. Based on this, one end of the first portion 120 is fixed to the second side of the color wheel housing 11 through the limiting hole. Since the first portion 120 is a straight-type heat pipe, when the first heat sink 12 is subjected to an impact, the first portion 120 is less likely to be deformed by the limiting hole, so that the deformation of the first portion 120 can be avoided and the color wheel is affected. 10 jobs.

Further, a second gasket 116 is further disposed between the second cover 115 and the color wheel housing 11 to ensure the sealing degree of the color wheel housing 11 and prevent dust and the like from entering the interior of the color wheel housing 11. In addition, the first cover plate 113 and the second cover plate 115 in this embodiment are fixed to the color wheel housing 11 by screws. Of course, the present invention is not limited thereto. In other embodiments, it may also be welded or Bonding or the like is sealed with the color wheel housing 11.

In one embodiment, as shown in FIG. 2 to FIG. 3, the limiting hole includes a first limiting hole 117 and a second limiting hole 118, and the first limiting hole 117 and the second limiting hole 118 are respectively located. Both ends of the second side. Moreover, the heat pipe on one side of the color wheel shaft 101 is fixed to the second side surface of the color wheel housing 11 through the first limiting hole 117; the heat pipe on the opposite side of the color wheel shaft 101 is fixed in the color through the second limiting hole 118. The second side of the wheel housing 11.

Further, as shown in FIG. 3 and FIG. 5, the color wheel 10 further includes a filter wheel 102. The filter wheel 102 and the color wheel 100 are respectively disposed on two sides of the color wheel shaft 101, and the first portion 120 is disposed on the filter wheel 102. In the gap between the color wheel 100 and the first portion 120 and the color wheel 100, the filter wheel 102 and the color wheel shaft 101 do not overlap to prevent the first portion 120 from affecting the color wheel 100, the filter wheel 102 and the color The rotation of the axle 101.

On the basis of the above embodiment, the color wheel module of the embodiment further includes a second heat sink 13 disposed outside the color wheel housing 11 and the second heat sink 13 and the first heat sink The second portion 121 of the piece 12 is thermally connected. That is, one end of the second portion 121 is thermally connected to the first portion 120, and the other end is thermally connected to the second heat sink 13.

Optionally, the second heat sink 13 includes a heat dissipation substrate 130 and a plurality of sheet fins 131 fixed on the heat dissipation substrate 130 . The second heat dissipating member 13 is made of metal, alloy or ceramic material. Optionally, the second heat dissipating member 13 is made of a light alloy with good thermal conductivity, such as C1100/AL6061/AL6063. The second portion 121 is thermally connected to the second heat sink 13 through all the fins 131. Alternatively, the second portion 121 is curved so as to be connected to the second heat sink 13. The utility model is not limited to this.

On the basis of any of the above embodiments, the color wheel module in this embodiment further includes a fan, and the fan is located outside the color wheel housing 11, and the fan is used to perform the second heat sink 13 and the second portion 121. Cooling. Of course, in other embodiments, the second heat sink 13 can also be dissipated through a light source module or a fan in the projection system.

In the color wheel module provided in this embodiment, since the first portion of the first heat sink is disposed inside the color wheel housing, and the second portion of the first heat sink extends from the end of the first portion to the outside of the color wheel housing, The heat generated by the color wheel inside the color wheel housing can be conducted to the first portion of the first heat dissipating member through the air flow inside the color wheel housing, and the heat can be transmitted to the second portion through the first portion to make the color wheel housing The heat inside the body is conducted to the outside of the color wheel housing; and, since the second portion is not limited by the volume of the color wheel housing, the present invention can increase the volume of the second portion to improve the heat dissipation of the first heat sink ability.

The embodiment of the present invention further provides a light source module, which includes a light source and a color wheel module, and the color wheel module is the color wheel module provided by the above embodiment. The excitation light emitted by the light source passes through the color wheel housing and is incident on the color wheel to excite the laser light for image projection.

The embodiment of the present invention further provides a projection system, which includes the light source module and the like provided by the above embodiments.

The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other. The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but the scope of the invention.

Claims

A color wheel module, comprising: a color wheel, a color wheel housing and a first heat sink;

The color wheel is sealed in the color wheel housing;

2. A color wheel module according to claim 1 wherein the distance between the first portion and the color wheel axis is greater than zero and less than or equal to 5 millimeters.

3. A color wheel module according to claim 1 wherein said first portion is parallel to the disk surface of said color wheel.

4. A color wheel module according to claim 3 wherein said first portion is disposed adjacent to said color wheel.

The color wheel module according to claim 4, wherein the distance between the first portion and the color wheel disk is greater than 0 and less than or equal to 5 mm.

The color wheel module according to claim 1, comprising at least two pieces of said first heat dissipating members parallel to each other, said at least two first heat dissipating members being respectively disposed on said color wheel axis On both sides.

7. The color wheel module of claim 1 wherein said first heat sink comprises at least one heat pipe.

8. The color wheel module of claim 7, wherein the first heat sink comprises a plurality of heat pipes disposed in close proximity.

9. The color wheel module of claim 1, wherein the two ends of the first portion respectively extend through the color wheel housing and are hermetically welded to the color wheel housing.

The color wheel module of claim 1 further comprising:

The color wheel module according to claim 10, wherein the second heat sink comprises a heat dissipation substrate and a plurality of sheet fins fixed on the heat dissipation substrate.

12. The color wheel module of claim 11, wherein the second portion of the first heat sink extends through the plurality of sheet fins.

The color wheel module of claim 10, wherein the color wheel module further comprises a fan, the fan being located outside the color wheel housing for the second heat sink and The second portion performs heat dissipation.

The color wheel module according to claim 1, wherein the color wheel further comprises a filter wheel, and the filter wheel and the color wheel are respectively disposed at two ends of the color wheel shaft. And the first portion of the first heat sink is located in a gap between the filter wheel and the color wheel disc.

The color wheel module according to claim 1, wherein at least one light-passing hole is disposed in the color wheel housing, and the light-passing hole is configured to receive excitation light and/or emit laser light.

A light source module, comprising: a light source and a color wheel module, wherein the color wheel module is the color wheel module according to any one of claims 1 to 15, the excitation light emitted by the light source After passing through the color wheel housing, it is incident on the color wheel to excite a laser beam for image projection.

A projection system comprising the light source module of claim 16.