CN220983708U - Laser projection equipment - Google Patents

Abstract

A laser projection device relates to the technical field of laser projection and is used for prolonging the service life of a digital micro-lens device. The laser projection device comprises a shell, a lens, a shell, a laser, a light reflecting piece, a first heat pipe, a first heat radiating piece, a second heat pipe and a second heat radiating piece. The shell is arranged in the shell and is provided with a light outlet. The laser is arranged in the shell and used for emitting light. The lens is at least partially arranged in the shell and is positioned at the light outlet. The light reflecting piece is arranged in the shell and used for receiving light rays emitted by the laser and reflecting the light rays to the lens through the light outlet. The first heat pipe is arranged in the shell, and the evaporation section of the first heat pipe is contacted with the light reflecting piece. The first heat dissipation piece is arranged in the shell and used for dissipating heat of the condensation section of the first heat pipe. The second heat pipe is arranged in the shell, and the evaporation section of the second heat pipe is contacted with the shell. The second heat dissipation piece is arranged in the shell and used for dissipating heat of the condensation section of the second heat pipe. The application is used for laser projection.

Description

Laser projection equipment

Technical Field

The application relates to the technical field of laser projection, in particular to laser projection equipment.

Background

Laser televisions are becoming popular, and the laser televisions mainly comprise a laser projection device and a screen, wherein the laser projection device can project pictures onto the screen, so that picture display is realized.

In the related art, a laser projection device includes a housing, and a laser, a DMD (Digital Micromirror Device; digital micro-lens device) assembly disposed inside the housing, the DMD assembly includes a DMD and a housing, the laser can emit light to the DMD, and the light can be emitted to a lens of the laser projection device under reflection of the DMD, so that projection display is realized through the lens. Because DMDs absorb a part of light and convert the light into heat while reflecting the light, the temperature of the DMDs can be increased, and the service life of the DMDs is shortened, so that in the prior art, the DMDs are cooled by adopting an air cooling or liquid cooling mode.

However, since the heat of the DMD itself is dissipated to the air in the housing, the high temperature environment in the housing still affects the DMD, thereby shortening the service life of the DMD.

Disclosure of utility model

The application provides a laser projection device which is used for prolonging the service life of a digital micro-lens device.

In one aspect, the present application provides a laser projection apparatus comprising: the device comprises a shell, a laser, a lens, a light reflecting piece, a first heat pipe, a first heat radiating piece, a second heat pipe and a second heat radiating piece.

The shell is arranged in the shell and is provided with a light outlet. The laser is arranged in the shell and used for emitting light. The lens is at least partially arranged in the shell and is positioned at the light outlet. The light reflecting piece is arranged in the shell and used for receiving light rays emitted by the laser and reflecting the light rays to the lens through the light outlet. The first heat pipe is arranged in the shell, and the evaporation section of the first heat pipe is contacted with the light reflecting piece. The first heat dissipation piece is arranged in the shell and used for dissipating heat of the condensation section of the first heat pipe. The second heat pipe is arranged in the shell, and the evaporation section of the second heat pipe is contacted with the shell. The second heat dissipation piece is arranged in the shell and used for dissipating heat of the condensation section of the second heat pipe.

According to the laser projection device, the laser emits light to the light reflecting piece, and under the action of the light reflecting piece, the light is continuously reflected and is injected into the lens through the light outlet. So that the lens can project a picture.

The evaporating section of the first heat pipe is in contact with the light reflecting piece, and the first heat radiating piece radiates heat on the condensing section of the first heat pipe. Therefore, the heat on the light reflecting piece can be conducted to the condensing section of the first heat pipe, and is conducted to the evaporating section of the first heat pipe under the action of the refrigerant in the first heat pipe, and finally is dissipated under the action of the first heat dissipating piece, so that the heat dissipation of the light reflecting piece is realized through circulation.

And because the evaporation section of the second heat pipe is in contact with the shell, the second heat dissipation piece dissipates heat of the condensation section of the second heat pipe. Therefore, the heat on the shell can be conducted to the condensing section of the second heat pipe, and is conducted to the evaporating section of the second heat pipe under the action of the refrigerant in the second heat pipe, and finally is dissipated under the action of the second heat dissipation piece, so that the heat dissipation is carried out on the shell in a circulating way, and the temperature in the shell is reduced.

Through the cooperation of first heat pipe and second heat pipe, realize the dual cooling to light reflector and casing to make the temperature of light reflector drop, make the casing ambient temperature that light reflector is located drop simultaneously, with this makes light reflector be in low temperature state, in order to increase the life of light reflector.

In some embodiments of the present application, the light reflecting member includes a reflecting surface and a heat dissipating surface, the reflecting surface is configured to receive light emitted by the laser and reflect the light to the lens, and the heat dissipating surface is in contact with the evaporation section of the first heat pipe.

Therefore, the evaporation section of the first heat pipe is in contact with the radiating surface of the light reflecting piece, but not in contact with the radiating surface, and the arrangement of the first heat conducting piece cannot influence the reflecting effect of the reflecting surface, so that the projection effect of the laser projection equipment can be ensured.

In some embodiments of the present application, the laser projection device further includes a third heat pipe disposed in the housing, the first heat exchange section of the third heat pipe being in contact with the heat dissipation surface, the second heat exchange section of the third heat pipe being in contact with the housing.

Therefore, the temperature difference between the radiating surface and the shell can be reduced by reducing the temperature difference between the radiating surface and the air inside the shell, and the temperature difference between the radiating surface and the reflecting surface is reduced, so that the service life of the light reflecting piece is prevented from being influenced, the brightness of the laser can be improved, and the purpose of improving the projection brightness of the laser projection equipment is achieved.

In some embodiments of the present application, the laser projection device further includes a first heat conducting member disposed in the housing, the first heat conducting member being at least partially disposed in the housing and contacting the heat dissipating surface; the first heat conduction piece is provided with a first heat conduction channel, the third heat pipe part extends into the first heat conduction channel along the extending direction of the first heat conduction channel, and the first heat exchange section of the third heat pipe is contacted with the inner wall surface of the first heat conduction channel.

Through the arrangement, the first heat conduction channel can increase the contact area between the first heat exchange section of the third heat pipe and the first heat conduction piece, so that the efficiency of the third heat pipe for absorbing heat on the first heat conduction piece is improved, and the temperature difference between the first heat exchange section and the second heat exchange section is quickened and reduced.

In some embodiments of the present application, a second heat conducting channel is formed on the first heat conducting member, a portion of the first heat pipe extends into the second heat conducting channel along an extending direction of the second heat conducting channel, and an evaporation section of the first heat pipe contacts an inner wall surface of the second heat conducting channel.

Therefore, the second heat conduction channel can increase the contact area between the evaporation section of the first heat pipe and the first heat conduction piece, so that the heat absorption efficiency of the first heat pipe on the first heat conduction piece is improved, and the heat dissipation efficiency of the light reflection piece is improved.

In some embodiments of the present application, the first heat conducting member includes a connecting portion and a heat dissipating portion, the connecting portion penetrates through a side wall of the housing, a first portion of the connecting portion is located in the housing and contacts the light reflecting member, a second portion of the connecting portion is located outside the housing, the heat dissipating portion is located outside the housing and is connected to the second portion of the connecting portion, and the first heat conducting channel is formed on the heat dissipating portion.

Through the arrangement, the evaporation section of the first heat pipe can not extend into the shell, but is contacted with the heat dissipation part outside the shell, thereby realizing heat transmission and facilitating the arrangement of the first heat pipe

In some embodiments of the present application, the heat dissipation portion includes a fixing plate and a plurality of heat dissipation fins, the fixing plate is connected to the connection portion, the first heat conduction channel is opened on the fixing plate, the plurality of heat dissipation fins are connected to the fixing plate and are sequentially arranged at intervals along a first direction, and the first direction is parallel to a plane where the fixing plate is located.

Through the arrangement, when the heat of the radiating surface of the light reflecting piece is conducted to the fixing plate, part of the heat on the fixing plate can be conducted to the radiating fins, and then radiated to the air, and the heat on the fixing plate can be radiated to the air faster due to the fact that the contact area between the radiating fins and the air is large, so that the radiating efficiency of the light reflecting piece is improved.

In some embodiments of the present application, the laser projection apparatus further includes a second heat conducting member, where the second heat conducting member is disposed in the housing and contacts with an outer wall surface of the housing, a third heat conducting channel is formed on the second heat conducting member, a portion of the third heat pipe extends into the third heat conducting channel along an extending direction of the third heat conducting channel, and a second heat exchange section of the third heat pipe is located in the third heat conducting channel and contacts with an inner wall surface of the third heat conducting channel.

Through the arrangement, the contact area between the second heat exchange section of the third heat pipe and the second heat conduction piece can be increased by the third heat conduction channel, so that the efficiency of the third heat pipe for absorbing heat on the second heat conduction piece is improved, and the temperature difference between the first heat exchange section and the second heat exchange section is quickened and reduced.

In some embodiments of the present application, a fourth heat conducting channel is formed on the second heat conducting member, and along an extending direction of the fourth heat conducting channel, a portion of the second heat pipe extends into the fourth heat conducting channel, and an evaporation section of the second heat pipe is located in the fourth heat conducting channel and contacts an inner wall surface of the fourth heat conducting channel.

Therefore, the contact area between the evaporation section of the second heat pipe and the second heat conduction piece can be increased through the fourth heat conduction channel, so that the heat absorption efficiency of the second heat pipe on the second heat conduction piece is improved, the heat dissipation efficiency of the shell is improved, the heat dissipation efficiency of air in the shell is improved, and the cooling effect of the light reflection piece is further improved.

In another aspect, the present application further provides a laser projection apparatus, including a housing, a shell, a laser, a lens, a light reflecting member, a first heat dissipating member, a first heat pipe, a second heat dissipating member, and a second heat pipe. The lens is at least partially arranged in the shell. The shell is arranged in the shell, and the laser is arranged in the shell and used for emitting light. The light reflecting piece is arranged in the shell and used for receiving light rays emitted by the laser and reflecting the light rays to the lens. The first heat pipe is arranged in the shell and is used for absorbing heat on the light reflecting piece. The first heat dissipation piece is arranged in the shell and used for dissipating heat on the first heat pipe. The second heat pipe is arranged in the shell and is used for absorbing heat in the shell. The second heat dissipation piece is arranged in the shell and used for dissipating heat on the second heat pipe.

The laser projection equipment provided by the application can achieve the same beneficial effects as the technical scheme, so that the description is omitted here.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and do not limit the utility model.

FIG. 1 is a schematic view of an external structure of a laser projection apparatus according to an embodiment of the present application;

FIG. 2 is a schematic view of an external structure of a housing according to an embodiment of the present application;

FIG. 3 is a schematic view of the external structure of the reflecting surface of the light reflecting member according to the embodiment of the present application;

FIG. 4 is a schematic view of an external structure of a heat dissipating surface of a light reflecting surface according to an embodiment of the present application;

FIG. 5 is a schematic view showing the external structure of a fin and a light reflecting member in the related art;

FIG. 6 is a schematic diagram of another external structure of a laser projection device according to an embodiment of the present application;

FIG. 7 is a schematic diagram of an external structure of a first heat pipe and a second heat pipe according to an embodiment of the present application;

FIG. 8 is a schematic diagram illustrating an external structure of a first heat pipe and a heat dissipation surface according to an embodiment of the present application;

FIG. 9 is a schematic diagram of an external structure of a first heat pipe and a first heat dissipation element according to an embodiment of the present application;

FIG. 10 is a schematic diagram illustrating another external structure of the first heat pipe and the first heat dissipation element according to the embodiment of the present application;

FIG. 11 is a schematic diagram of an external structure of a second heat pipe and a second heat dissipation element according to an embodiment of the present application;

FIG. 12 is a schematic diagram of another external structure of a second heat pipe and a second heat dissipation element according to an embodiment of the present application;

Fig. 13 is a schematic diagram of an external structure of a first heat pipe and a first heat conducting member according to an embodiment of the present application;

Fig. 14 is a schematic view showing an external structure of a first heat conducting member and a heat dissipating surface according to an embodiment of the present application;

Fig. 15 is a schematic view of an external structure of a first heat conducting member according to an embodiment of the present application;

Fig. 16 is a schematic view of another external structure of the first heat conducting member according to the embodiment of the present application;

FIG. 17 is a schematic view of the external structure of a second heat pipe and a second heat conducting member according to an embodiment of the present application;

FIG. 18 is a schematic view of the external structure of a third heat pipe and a housing according to an embodiment of the present application;

FIG. 19 is a schematic view showing an external structure of a third heat pipe and a first heat conducting member according to an embodiment of the present application;

Fig. 20 is a schematic view of an external structure of a third heat pipe and a second heat conducting member according to an embodiment of the present application.

Reference numerals: 1-a laser projection device; 11-a housing; 12-lens; 13-a housing; 131-a light reflector; 132-a laser; 133-a light outlet; 134-fins; 14-a first heat pipe; 15-a first heat sink; 151-first heat radiating fins; 16-a second heat pipe; 17-a second heat sink; 171-second heat radiating fins; 18-a first heat conducting member; 181-a second heat conduction path; 182-connection; 183-heat sink; 184-heat radiating fins; 185-fixing plate; 19-a second heat conducting member; 20-a third heat pipe; 201-a first heat exchange section; 202-a second heat exchange section; an A-reflecting surface; and B-a heat radiating surface.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art. In addition, when describing a pipeline, the terms "connected" and "connected" as used herein have the meaning of conducting. The specific meaning is to be understood in conjunction with the context.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Laser televisions are becoming popular, and a core component of the laser televisions is a laser projection device, and an existing laser projection standby principle is to display images by a Digital Light Processing (DLP) technology.

Based on this, as shown in fig. 1, the present application provides a laser projection apparatus 1 including a housing 11 and a lens 12, the lens 12 being at least partially disposed within the housing 11 for projection of an image.

In order to enable the lens 12 to receive light and project the light, as shown in fig. 2, the laser projection device 1 further includes a housing 13, a laser 132, and a light reflecting member 131, where the housing 13 is disposed in the housing 11, and the housing 13 has a light outlet 133, and the lens 12 is located at the light outlet 133. The laser 132 is disposed in the housing 13 and is used for emitting light, and the light reflecting member 131 is disposed in the housing 13 and is used for receiving the light emitted by the laser 132 and reflecting the light to the lens 12 through the light outlet 133.

In some examples, light reflecting member 131 is a DMD (Digital Micromirror Device; digital micro-lens device) that is used to reflect light from laser 132 onto lens 12 through light outlet 133.

In some embodiments, as shown in fig. 3 and 4, the light reflecting member 131 (DMD) has a reflecting surface a and a radiating surface B disposed opposite to each other, and the reflecting surface a is used for receiving the light emitted by the laser 132 and reflecting the light to the lens 12. The radiating surface B is provided with a radiating area and a pin area surrounding the radiating area, and a plurality of pins are arranged in the pin area. The pins are used for connecting leads.

Since the brightness of the light emitted by the laser 132 is high, and the light reflecting member 131 absorbs a part of the light and converts the light into heat during the process of reflecting the light, the temperature of the light reflecting member 131 is increased, thereby shortening the service life of the light reflecting member 131.

Accordingly, in the related art, as shown in fig. 5, the light reflecting member 131 is cooled down in such a manner that the fins 134 are in contact with the light reflecting member 131. Specifically, the fins 134 are in contact with the light reflecting member 131, so that heat on the light reflecting member 131 is conducted to the fins 134 and is further emitted into the air through the fins 134, thereby reducing the temperature of the light reflecting member 131 and prolonging the service life of the light reflecting member 31.

However, since the heat of the light reflecting member 131 is also conducted to the air inside the housing 13, the temperature inside the housing 13 and on the housing 13 is increased, so that the light reflecting member 131 is exposed to a high temperature environment, thereby affecting the same, and thus the service life of the light reflecting member 131 is also shortened.

Based on this, as shown in fig. 6, the laser projection device 1 in the present application further includes a first heat sink 15, a first heat pipe 14, a second heat sink 17, and a second heat pipe 16. The first heat pipe 14 is disposed in the housing 11 and is used for absorbing heat on the light reflecting member 131. The first heat dissipation element 15 is disposed in the housing 11 and is used for dissipating heat on the first heat pipe 14. The second heat pipe 16 is disposed in the housing 11 and is used for absorbing heat in the casing 13. The second heat dissipation element 17 is disposed in the housing 11 and is used for dissipating heat on the second heat pipe 16.

Specifically, as shown in fig. 7, the evaporation section of the first heat pipe 14 contacts the light reflecting member 131, and the first heat dissipating member 15 is used for dissipating heat from the condensation section of the first heat pipe 14. The evaporation section of the second heat pipe 16 contacts the housing 13, and the second heat dissipation element 17 is used for dissipating heat from the condensation section of the second heat pipe 16.

In this way, the heat on the light reflecting member 131 can be conducted to the condensing section of the first heat pipe 14, and conducted to the evaporating section of the first heat pipe 14 under the action of the refrigerant in the first heat pipe 14, and finally dissipated under the action of the first heat dissipating member 15, so that the heat of the light reflecting member 131 is dissipated in this cycle.

The second heat dissipation member 17 dissipates heat from the condensation section of the second heat pipe 16 due to the contact between the evaporation section of the second heat pipe 16 and the housing 13. Therefore, the heat on the shell 13 can be conducted to the condensing section of the second heat pipe 16, and is conducted to the evaporating section of the second heat pipe 16 under the action of the refrigerant in the second heat pipe 16, and finally is dissipated under the action of the second heat dissipation element 17, so that the heat dissipation is performed on the shell 13 in a circulating manner, and the temperature in the shell 13 is reduced.

Through the cooperation of the first heat pipe 14 and the second heat pipe 16, the dual cooling of the light reflecting member 131 and the shell 13 is realized, so that the temperature of the light reflecting member 131 is reduced, and meanwhile, the environment temperature of the shell 13 where the light reflecting member 131 is positioned is reduced, so that the light reflecting member 131 is in a low-temperature state, and the service life of the light reflecting member 131 is prolonged.

In some embodiments, as shown in fig. 8, the heat dissipating surface B is in contact with the evaporator end of the first heat pipe 14.

In this way, the heat on the light reflecting member 131 can be conducted to the first heat pipe 14 through the heat dissipating surface B, and then the first heat pipe 14 is cooled through the first heat dissipating member 15, so that the light reflecting member 131 can be cooled through the first heat dissipating member 15. And the evaporation section of the first heat pipe 14 is in contact with the heat dissipation surface B of the light reflection member 131, but not in contact with the emission surface, so that the arrangement of the first heat conduction member 18 does not affect the reflection effect of the reflection surface a, thereby ensuring the projection effect of the laser projection device 1.

In some examples, as shown in fig. 9, the first heat sink 15 includes a first heat sink fin 151, the first heat sink fin 151 being in contact with the condensing section of the first heat pipe 14. So that the heat conducted to the condensing section of the first heat pipe 14 is conducted to the first heat radiating fins 151 and finally dissipated. Because the radiating fins can be fully contacted with air, when heat is conducted to the radiating fins, the heat can be conducted to the air more quickly, so that the radiating efficiency is improved.

For example, as shown in fig. 10, the first heat pipe 14 may penetrate the first heat radiating fin 151 such that the first heat radiating fin 151 wraps around the condensing section of the first heat pipe 14. In this way, the first heat pipe 14 is fully contacted with the first heat dissipation fins 151, so that the heat dissipation efficiency of the condensation section of the first heat pipe 14 is further improved, and the heat dissipation efficiency of the light reflecting member 131 is ensured.

Or the first heat dissipation element 15 may also include a first refrigerant box, where the condensation section of the first heat pipe 14 extends into the first refrigerant box, so as to dissipate heat by using the refrigerant in the first refrigerant box to cool the condensation section of the first heat pipe 14.

In some examples, as shown in fig. 11, the second heat sink 17 includes a second heat sink fin 171, the second heat sink fin 171 being in contact with the condensing section of the second heat pipe 16. So that the heat conducted to the condensing section of the second heat pipe 16 is conducted to the second heat radiating fin 171 and finally radiated. Because the radiating fins can be fully contacted with air, when heat is conducted to the radiating fins, the heat can be conducted to the air more quickly, so that the radiating efficiency is improved.

Illustratively, as shown in fig. 12, the second heat pipe 16 may extend through the second heat dissipating fins 171 such that the second heat dissipating fins 171 wrap around the condensing section of the second heat pipe 16. This can make the second heat pipe 16 sufficiently contact with the second heat radiating fin 171, thereby further improving the heat radiating efficiency of the condensing section of the second heat pipe 16 to ensure the heat radiating efficiency of the housing 13.

Or the second heat dissipation element 17 may also include a second refrigerant tank, where the condensation section of the second heat pipe 16 extends into the second refrigerant tank, so as to dissipate heat from the condensation section of the second heat pipe 16 by using the refrigerant in the second refrigerant tank.

In some embodiments, the evaporator end of the first heat pipe 14 may be in direct contact with the light reflector 131.

In other embodiments, the evaporation section of the first heat pipe 14 may also be indirectly contacted with the light reflecting member 131, specifically, as shown in fig. 13 and 14, the laser projection apparatus 1 further includes a first heat conducting member 18, where the first heat conducting member 18 is disposed in the housing 11, and the first heat conducting member 18 is at least partially located in the housing 13 and contacts the heat dissipating surface B. The first heat conducting member 18 is provided with a second heat conducting channel 181, and along the extending direction of the second heat conducting channel 181, a part of the first heat pipe 14 extends into the second heat conducting channel 181, and the evaporation section of the first heat pipe 14 contacts with the inner wall surface of the second heat conducting channel 181.

The second heat conducting channel 181 may be a first groove formed on the surface of the first heat conducting member 18, and an inner wall surface of the first groove contacts with the evaporation section of the first heat pipe 14.

Alternatively, the first heat conductive member 18 may have a first passage formed therein, and the inner peripheral wall surface of the first passage may be in contact with the evaporation stage of the first heat pipe 14.

In this way, the heat on the heat dissipation surface B sequentially passes through the first heat conduction member 18, the evaporation section of the first heat pipe 14, and the condensation section of the first heat pipe 14 and is finally conducted to the first heat dissipation member 15, so as to sequentially realize heat transfer.

Because the second heat conducting channel 181 is disposed on the first heat conducting member 18, the contact area between the evaporation section of the first heat pipe 14 and the first heat conducting member 18 can be increased, so as to improve the heat absorption efficiency of the first heat pipe 14 on the first heat conducting member 18, thereby achieving the purpose of improving the heat dissipation efficiency of the light reflecting member 131.

In addition, in the case that the first heat pipe 14 is in contact with the heat dissipation surface B indirectly or directly and has the same heat dissipation efficiency, since the contact area between the first heat pipe 14 and the first heat conduction member 18 is large, the length of the evaporation section of the first heat pipe 14 can be shortened, that is, the length of the first heat pipe 14 can be shortened, so that the layout and the arrangement of the first heat pipe 14 can be facilitated.

In some embodiments, as shown in fig. 15, the first heat conducting element 18 includes a connection portion 182 and a heat dissipation portion 183, the connection portion 182 penetrates through a side wall of the housing 13, a first portion of the connection portion 182 is located in the housing 13 and contacts the heat dissipation surface B, and a second portion of the connection portion 182 is located outside the housing 13. The heat dissipation portion 183 is located outside the housing 13 and connected to the second portion of the connection portion 182, and the second heat conduction channel 181 is opened on the heat dissipation portion 183.

Through the above arrangement, the heat on the heat dissipation surface B is conducted to the evaporation section of the first heat pipe 14 through the connection portion 182 and the heat dissipation portion 183 in order, so as to realize heat transfer. Since the heat dissipation portion 183 is disposed outside the housing 13 and the second heat conduction channel 181 is disposed on the heat dissipation portion 183, the evaporation section of the first heat pipe 14 may not extend into the housing 13, so as to facilitate the disposition of the first heat pipe 14.

It can be understood that the connection portion 182 is connected to the heat dissipation area on the heat dissipation surface B, so that the heat on the light reflecting member 131 can be conducted to the connection portion 182, and the arrangement of the connection portion 182 can be prevented from affecting the arrangement of the pins in the pin area.

In some examples, the connection portion 182 is connected with the heat radiating surface B, thereby simultaneously achieving contact and connection of the connection portion 182 with the light reflecting member 131.

In other embodiments, the second heat conducting channel 181 may also be formed on the connecting portion 182.

In some embodiments, as shown in fig. 16, the heat dissipation portion 183 includes a fixing plate 185 and a plurality of heat dissipation fins 184, the fixing plate 185 is connected to the connection portion 182, and the second heat conduction channel 181 is formed on the fixing plate 185. The plurality of heat dissipation fins 184 are connected to the fixing plate 185 and are sequentially arranged at intervals along a first direction, and the first direction is parallel to a plane where the fixing plate 185 is located.

It can be appreciated that the number of the plurality of radiating fins 184 should be set according to the size of the fixing plate 185 and the distance between the adjacent two radiating fins 184.

In addition, the fixing plate 185 is also made of a heat conductive material, for example, copper, aluminum, etc.

For example, the first direction may be a direction parallel to the extending direction of the second heat conduction channel 181, that is, the plurality of heat dissipation fins 184 are disposed parallel to the second heat conduction channel 181.

Alternatively, the first direction may be a direction perpendicular to the extending direction of the second heat conduction path 181, that is, the plurality of heat dissipation fins 184 may be disposed perpendicular to the second heat conduction path 181.

Illustratively, the second thermally conductive path 181 may include a second path,

Or the second heat conduction path 181 may include a second groove,

In this case, the second heat conduction path 181 is disposed between the adjacent two heat dissipation fins 184, so that the processing of the second heat conduction path 181 can be facilitated.

The fixing plate 185 and the plurality of radiating fins 184 may be integrally formed, or may be formed as a separate structure.

Through the above arrangement, when the heat of the heat dissipating surface B is conducted to the heat dissipating portion 183, the heat can be conducted to the evaporation section of the first heat pipe 14 through the second heat conducting channel 181 on the fixing plate 185, and the heat is conducted to the first heat dissipating member 15 through the first heat pipe 14, so that the first heat dissipating member 15 cools the first heat pipe 14, thereby cooling the light reflecting member 131.

Meanwhile, part of the heat conducted to the fixing plate 185 is conducted to the plurality of radiating fins 184, and then radiated into the air, and the heat on the fixing plate 185 can be radiated into the air more quickly due to the larger contact area between the radiating fins and the air, so that the radiating efficiency of the light reflecting member 131 is improved.

Illustratively, the first thermally conductive member 18 may be an aluminum extruded heat sink. Or the first heat conductive member 18 may be a ceramic base.

In order to improve the heat exchange efficiency between the housing 13 and the second heat pipe 16, in some embodiments, as shown in fig. 17, the laser projection device 1 of the present application further includes a second heat conducting member 19, where the second heat conducting member 19 is disposed in the casing 11 and contacts with the outer wall surface of the housing 13. The second heat conducting member 19 is provided with a fourth heat conducting channel (a position on the second heat conducting member 19 contacting with the second heat pipe 16 in fig. 17), and along the extending direction of the fourth heat conducting channel, a portion of the second heat pipe 16 extends into the fourth heat conducting channel, and the evaporation section of the second heat pipe 16 is located in the fourth heat conducting channel and contacts with the inner wall surface of the fourth heat conducting channel.

The fourth heat conducting channel may be, for example, a third groove formed on the surface of the second heat conducting member 19, and an inner wall surface of the third groove contacts with the evaporation section of the second heat pipe 16.

Alternatively, a third passage may be provided in the second heat conductive member 19, and the inner peripheral wall surface of the third passage may be in contact with the evaporation stage of the second heat pipe 16.

In this way, the heat on the housing 13 sequentially passes through the second heat conducting member 19, the evaporation section of the second heat pipe 16, and the condensation section of the second heat pipe 16, and is finally conducted to the second heat dissipating member 17, so as to sequentially realize heat transfer.

Because the second heat conducting member 19 is provided with the fourth heat conducting channel, the contact area between the evaporation section of the second heat pipe 16 and the second heat conducting member 19 can be increased, so that the efficiency of the second heat pipe 16 for absorbing heat on the second heat conducting member 19 is improved, and the purpose of improving the heat dissipation efficiency of the light reflecting member 131 is achieved.

In addition, in the case where the second heat pipe 16 is in contact with the housing 13 indirectly or directly and has the same heat dissipation efficiency, since the contact area between the second heat pipe 16 and the second heat conductive member 19 is large, the length of the evaporation section of the second heat pipe 16 can be shortened, that is, the length of the second heat pipe 16 can be shortened, so that the layout and arrangement of the second heat pipe 16 can be facilitated.

The second heat conducting member 19 may be a copper plate, for example, and the copper material has a better heat absorbing effect, so that the heat on the housing 13 can be more quickly conducted to the evaporation section of the second heat pipe 16, thereby improving the heat conducting efficiency.

Or the second heat conducting member 19 may be a ceramic plate.

In other examples, the second heat conducting member 19 may further include a plurality of heat conducting fins, in addition to the copper plate, connected to the surface of the copper plate, and sequentially arranged at intervals along a second direction parallel to the plane of the copper plate. Wherein, the fourth heat conduction channel is arranged on the copper plate.

In this way, after the heat on the shell 13 is transferred to the copper plate, a part of the heat will pass through the evaporation section of the second heat pipe 16 and the condensation section of the second heat pipe 16 in sequence, and finally be dissipated under the action of the second heat dissipation element 17. Another portion of the heat is conducted directly to the heat conducting fins and ultimately dissipated to the air. Because the contact area of the heat conducting fin and the air is larger, the heat dissipation efficiency of the copper plate can be improved, and the heat dissipation efficiency of the shell 13 is further improved, so that the heat dissipation efficiency of the air in the shell 13 is improved, and the cooling effect of the light reflecting piece 131 is further improved.

Since the heat conduction efficiency of the light reflecting member 131 is low, and a certain distance is provided between the reflecting surface a and the radiating surface B of the light reflecting member 131, when the light reflecting member 131 is cooled, the temperature of the reflecting surface a of the light reflecting member 131 is higher than the temperature of the radiating surface B, and a temperature difference exists between the two surfaces, when the brightness emitted by the laser 132 is increased, the heat absorbed by the reflecting surface a is increased, and therefore the temperature difference is also increased, and the service life of the light reflecting member 131 is also affected.

In order to avoid influencing the service life of the light reflecting member 131, the brightness of the light emitted by the laser 132 can be limited, so that the temperature difference between the temperature of the reflecting surface a and the temperature of the heat dissipating surface B of the light reflecting member 131 is prevented from being too high, but in this way, the brightness of the image reflected by the light reflecting member 131 onto the lens 12 is limited, so that the projection brightness of the laser projection device 1 is influenced.

Based on this, in some embodiments, as shown in fig. 18, the above-mentioned laser projection device 1 further includes a third heat pipe 20, the third heat pipe 20 is disposed in the housing 11, the first heat exchange section 201 of the third heat pipe 20 is in contact with the heat dissipation surface B, and the second heat exchange section 202 of the third heat pipe 20 is in contact with the casing 13.

In this way, when the temperature of the heat dissipating surface B is greater than the temperature of the housing 13, a portion of the heat on the heat dissipating surface B is conducted from the first heat exchanging section 201 of the third heat pipe 20 to the second heat exchanging section 202 of the third heat pipe 20 and further to the housing 13, so as to reduce the temperature difference between the heat dissipating surface B and the housing 13.

When the temperature of the heat dissipation surface B is less than the temperature of the housing 13, a portion of the heat on the housing 13 is transferred from the second heat exchange section 202 of the third heat pipe 20 to the first heat exchange section 201 of the third heat pipe 20, and further transferred to the heat dissipation surface B. Thereby balancing the temperature difference between the case 13 and the radiating surface B.

And because part of the heat on the shell 13 is emitted to the air inside the shell 13 by the heat on the reflecting surface A and is further conducted to the shell 13, the temperature difference between the radiating surface B and the reflecting surface A can be reduced by reducing the temperature difference between the radiating surface B and the shell 13.

In this way, the temperature difference between the heat radiation surface B and the reflection surface a is reduced, so that the brightness of the light emitted by the laser 132 can be improved, and the brightness of the light reflected by the light reflecting member 131 onto the lens 12 and the brightness of the image formed by the lens 12 projected onto the screen can be improved, so that the projection brightness of the laser projection device 1 can be improved.

In order to improve the heat exchange efficiency between the light reflecting member 131 and the third heat pipe 20, in some embodiments, as shown in fig. 19, a first heat conducting channel (a position on the first heat conducting member 18 contacting with the first heat exchanging section 201 in fig. 19) is formed on the first heat conducting member 18, along the extending direction of the first heat conducting channel, the third heat pipe 20 partially extends into the first heat conducting channel, and the first heat exchanging section 201 of the third heat pipe 20 contacts with the inner wall surface of the first heat conducting channel.

Illustratively, the first and second heat conducting channels may be two distinct channels in contact with the third heat pipe 20 and the first heat pipe 14, respectively.

Or the first and second heat conducting channels may be the same channel while in contact with the third heat pipe 20 and the first heat pipe 14.

Illustratively, the first heat conducting channel may be a fourth groove formed on the surface of the first heat conducting member 18, and an inner wall surface of the fourth groove contacts the first heat exchanging section 201 of the third heat pipe 20.

Alternatively, the inner peripheral wall surface of the fourth passage may be in contact with the first heat exchange section 201 of the third heat pipe 20, and the fourth passage may be provided inside the first heat conductive member 18.

In this way, the heat on the heat dissipating surface B is conducted to the first heat exchanging section 201 of the third heat pipe 20 through the first heat conducting member 18, so that the heat is transferred to each other through the third heat pipe 20 and the second heat exchanging section 202 of the third heat pipe 20, so that the heat dissipating surface B and the housing 13 can transfer heat to each other, and the temperature difference between the heat dissipating surface B and the housing 13 can be reduced.

Because the first heat conducting channel is arranged on the first heat conducting member 18, the contact area between the first heat exchanging section 201 of the third heat pipe 20 and the first heat conducting member 18 can be increased, so that the efficiency of the third heat pipe 20 for absorbing heat on the first heat conducting member 18 is improved, the temperature difference between the first heat exchanging section 201 and the second heat exchanging section 202 is reduced, and the purpose of reducing the temperature difference between the radiating surface B and the shell 13 is achieved.

In addition, in the case where the third heat pipe 20 is in contact with the light reflecting member 131 indirectly or directly and has the same heat exchanging efficiency, since the contact area of the third heat pipe 20 with the first heat conducting member 18 is large, the length of the first heat exchanging section 201 of the third heat pipe 20, that is, the length of the third heat pipe 20 can be shortened, so that the layout and arrangement of the third heat pipe 20 can be facilitated.

In order to improve the heat exchange efficiency between the housing 13 and the third heat pipe 20, in some embodiments, as shown in fig. 20, a third heat conducting channel (a position on the second heat conducting member 19 contacting with the second heat exchange section 202 in fig. 20) is formed on the second heat conducting member 19, along the extending direction of the third heat conducting channel, the third heat pipe 20 partially extends into the third heat conducting channel, and the second heat exchange section 202 of the third heat pipe 20 contacts with the inner wall surface of the third heat conducting channel.

Illustratively, the third and fourth thermally conductive paths may be two different paths in contact with the third and second heat pipes 20 and 16, respectively.

Or the third and fourth heat conducting channels may be the same channel while in contact with the third and second heat pipes 20 and 16.

Illustratively, the third heat conducting channel may be a fifth groove formed on the surface of the second heat conducting member 19, and an inner wall surface of the fifth groove contacts the second heat exchanging section 202 of the third heat pipe 20.

Alternatively, a fifth passage may be provided in the second heat conductive member 19, and the inner peripheral wall surface of the fifth passage may be in contact with the second heat exchange section 202 of the third heat pipe 20.

In this way, the heat on the housing 13 is transferred to the second heat exchange section 202 of the third heat pipe 20 through the second heat conducting member 19, so that the heat is transferred to each other through the third heat pipe 20 and the first heat exchange section 201 of the third heat pipe 20, so that the heat dissipation surface B and the housing 13 can transfer heat to each other, and the temperature difference between the heat dissipation surface B and the housing 13 can be reduced.

Because the third heat conducting channel is arranged on the second heat conducting piece 19, the contact area between the second heat exchanging section 202 of the third heat pipe 20 and the second heat conducting piece 19 can be increased, so that the efficiency of the third heat pipe 20 for absorbing heat on the second heat conducting piece 19 is improved, the temperature difference between the first heat exchanging section 201 and the second heat exchanging section 202 is reduced, and the purpose of reducing the temperature difference between the radiating surface B and the shell 13 is achieved.

In addition, in the case where the third heat pipe 20 is in contact with the light reflecting member 131 indirectly or directly and has the same heat exchanging efficiency, since the contact area of the third heat pipe 20 and the second heat conducting member 19 is large, the length of the second heat exchanging section 202 of the third heat pipe 20, that is, the length of the third heat pipe 20 can be shortened, so that the layout and arrangement of the third heat pipe 20 can be facilitated.

The foregoing is merely illustrative of specific embodiments of the present application, and the scope of the present application is not limited thereto, but any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (10)

1. A laser projection device, comprising:

A housing;

the shell is arranged in the shell and is provided with a light outlet;

The laser is arranged in the shell and used for emitting light;

The lens is at least partially arranged in the shell and is positioned at the light outlet;

The light reflecting piece is arranged in the shell and is used for receiving light rays emitted by the laser and reflecting the light rays to the lens through the light outlet;

the first heat pipe is arranged in the shell, and the evaporation section of the first heat pipe is contacted with the light reflecting piece;

The first heat dissipation piece is arranged in the shell and is used for dissipating heat of the condensation section of the first heat pipe;

The second heat pipe is arranged in the shell, and the evaporation section of the second heat pipe is in contact with the shell;

The second heat dissipation piece is arranged in the shell and is used for dissipating heat of the condensation section of the second heat pipe.

2. The laser projection device of claim 1, wherein the light reflecting member comprises a reflecting surface and a heat dissipating surface disposed opposite to each other, the reflecting surface being configured to receive light emitted from the laser and reflect the light to the lens, and the heat dissipating surface being in contact with the evaporator end of the first heat pipe.

3. The laser projection device of claim 2, further comprising: the third heat pipe is arranged in the shell, the first heat exchange section of the third heat pipe is in contact with the radiating surface, and the second heat exchange section of the third heat pipe is in contact with the shell.

4. A laser projection device as claimed in claim 3, further comprising: the first heat conduction piece is arranged in the shell, and at least part of the first heat conduction piece is positioned in the shell and is contacted with the radiating surface;

The first heat conduction piece is provided with a first heat conduction channel, the third heat pipe part extends into the first heat conduction channel along the extending direction of the first heat conduction channel, and the first heat exchange section of the third heat pipe is in contact with the inner wall surface of the first heat conduction channel.

5. The laser projection device as claimed in claim 4, wherein the first heat conducting member is provided with a second heat conducting channel, a portion of the first heat pipe extends into the second heat conducting channel along an extending direction of the second heat conducting channel, and an evaporation section of the first heat pipe contacts with an inner wall surface of the second heat conducting channel.

6. The laser projection device of claim 4, wherein the first thermally conductive member comprises:

The connecting part penetrates through the side wall of the shell, a first part of the connecting part is positioned in the shell and is in contact with the radiating surface, and a second part of the connecting part is positioned outside the shell;

and the heat dissipation part is positioned outside the shell and connected with the second part of the connecting part, and the first heat conduction channel is arranged on the heat dissipation part.

7. The laser projection device as claimed in claim 6, wherein the heat sink portion includes:

the fixing plate is connected with the connecting part, and the first heat conduction channel is arranged on the fixing plate;

The radiating fins are connected to the fixing plate and are sequentially arranged at intervals along a first direction, and the first direction is parallel to the plane where the fixing plate is located.

8. The laser projection device as claimed in any one of claims 3 to 7, further comprising: the second heat conduction piece is arranged in the shell and is contacted with the outer wall surface of the shell;

the second heat conduction piece is provided with a third heat conduction channel, a part of the third heat pipe extends into the third heat conduction channel along the extending direction of the third heat conduction channel, and the second heat exchange section of the third heat pipe is positioned in the third heat conduction channel and is in contact with the inner wall surface of the third heat conduction channel.

9. The laser projection device as claimed in claim 8, wherein a fourth heat conduction channel is formed on the second heat conduction member, a portion of the second heat pipe extends into the fourth heat conduction channel along an extending direction of the fourth heat conduction channel, and the evaporation section of the second heat pipe is located in the fourth heat conduction channel and contacts with an inner wall surface of the fourth heat conduction channel.

10. A laser projection device, comprising:

A housing;

the shell is arranged in the shell and is provided with a light outlet;

The laser is arranged in the shell and used for emitting light;

The lens is at least partially arranged in the shell and is positioned at the light outlet;

The light reflecting piece is arranged in the shell and is used for receiving light rays emitted by the laser and reflecting the light rays to the lens through the light outlet;

The first heat pipe is arranged in the shell and is used for absorbing heat on the light reflecting piece;

The first heat dissipation piece is arranged in the shell and used for dissipating heat on the first heat pipe;

The second heat pipe is arranged in the shell and is used for absorbing heat in the shell;

The second heat dissipation piece is arranged in the shell and used for dissipating heat on the second heat pipe.