CN112835251A

CN112835251A - Laser projection device

Info

Publication number: CN112835251A
Application number: CN202110064668.2A
Authority: CN
Inventors: 崔雷; 邢哲
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-05-25
Also published as: WO2022152300A1; CN116710841A

Abstract

The application discloses laser projection device relates to projection equipment technical field for solve the current radiating scheme to the not good problem of radiating effect of laser instrument, ray apparatus and camera lens. The optical-mechanical assembly is connected between the light path of the light source assembly and the light path of the lens assembly; the optical-mechanical assembly is positioned in the area close to the first side in the shell and arranged along the extending direction of the first side, the light source assembly is positioned on one side of the optical-mechanical assembly close to the second side of the shell, the lens assembly is positioned on one side of the optical-mechanical assembly close to the third side of the shell, and the second side is opposite to the third side and is intersected with the first side; the first fan assembly is used for guiding air into the shell from the first side to form heat dissipation airflow, and the heat dissipation airflow blows towards the light source assembly and then is guided out from the second side of the shell; the flow guide piece is used for guiding the heat dissipation airflow to the optical-mechanical assembly and the lens assembly and then guiding the heat dissipation airflow out of the third side of the shell.

Description

Laser projection device

Technical Field

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

Background

The laser projection device adopts a high-power laser to convert electric energy into light energy, and the generated laser beam is projected on a screen through a series of comprehensive actions of an optical system, a circuit system, a lighting system and a lens system to form a projection picture.

The laser projection device comprises a laser, an optical machine and a lens, wherein the laser generates a laser beam by converting electric energy into optical energy, a large amount of heat is generated in the process of converting the electric energy into the optical energy, the heat flux density of the heat flux is the largest in the laser projection device, so that the laser is the most main heat source in the whole machine, and the heat energy needs to be dissipated in time so as to ensure the high-efficiency luminous efficiency, reliability and service life of the laser; the optical machine comprises an optical modulation chip, wherein the optical modulation chip is an electronic Device, such as a Digital Micromirror Device (DMD) chip, the DMD chip modulates an illumination light beam emitted by a laser into a modulated light beam with image information, the DMD chip also generates more heat during operation, and the working performance is affected by temperature images; although the lens does not generate heat, the high-energy laser generated by the laser device finally needs to be projected through the lens, the lens is always exposed to the high-energy light beam, according to the working principle of the light modulation chip, for example, part of the light in the OFF state of the DMD may reach the lens housing, thereby also bringing about temperature rise, the lens includes multiple groups of precise optical lenses, and the lenses are packaged in a relatively closed lens barrel structure. In order to meet the heat dissipation requirements of heat sources or core working components in equipment, multiple sets of fans are usually required to be arranged at multiple positions, but this not only increases the number of components, but also needs to adjust the arrangement layout of the whole machine, and also causes the noise problem of different fans when the fans rotate at high speed, so that the heat dissipation efficiency is not economical, and the use experience of users is also reduced. With the compact arrangement of the components of the laser projection device or the miniaturization of the volume, the heat dissipation problem of each heat source or core working component in the laser projection device is more prominent.

Disclosure of Invention

The embodiment of the application provides a laser projection device for solve among the prior art laser projection device's heat dissipation scheme to the not good problem of radiating effect of laser instrument, ray apparatus and camera lens.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

the embodiment of the application provides a laser projection device includes the casing, install in the casing: a light source assembly for providing an illumination beam to the light engine assembly; the lens assembly is used for projecting and imaging the image light beam output by the optical-mechanical assembly; the optical-mechanical assembly is connected between the light paths of the light source assembly and the lens assembly and is used for modulating the illumination light beams provided by the light source assembly to generate image light beams; the optical-mechanical assembly is positioned in the area, close to the first side, in the shell and arranged along the extending direction of the first side, the light source assembly is positioned on one side, close to the second side of the shell, of the optical-mechanical assembly, the lens assembly is positioned on one side, close to the third side of the shell, of the optical-mechanical assembly, and the second side is opposite to the third side and is intersected with the first side; the first fan assembly is used for guiding air into the shell from a first side to form heat dissipation airflow, and the heat dissipation airflow is blown to the light source assembly and then is guided out from a second side of the shell; and the flow guide piece is used for guiding the heat dissipation airflow to the optical machine component and the lens component and then guiding the heat dissipation airflow out from the third side of the shell.

In some possible embodiments of the present disclosure, the light source assembly is parallel to the lens assembly, and the optical-mechanical assembly is vertically disposed at the same side of the light source assembly and the lens assembly to form a U-shaped arrangement; or the lens assembly and the optical-mechanical assembly are sequentially connected and arranged and are perpendicular to the light source assembly to form an L-shaped arrangement.

In some possible embodiments of the present disclosure, the light source assembly is parallel to the lens assembly, and the optical-mechanical assembly is vertically disposed at the same side of the light source assembly and the lens assembly to form a U-shaped arrangement; or the lens assembly and the optical-mechanical assembly are arranged side by side and are perpendicular to the light source assembly so as to be arranged in an L shape.

In some possible embodiments of the present application, the first fan assembly is located between the optical mechanical assembly and the first side of the housing, an air inlet side of the first fan assembly faces the first side of the housing, and an air outlet side of the first fan assembly faces an area on the optical mechanical assembly, which is close to the light source assembly.

In some possible embodiments of the present application, the diversion member is a diversion fan installed at the optical mechanical component, an air inlet direction of the diversion fan is perpendicular to an air outlet direction of the first fan component, and an air outlet side of the diversion fan faces the lens component.

In some possible embodiments of the present disclosure, a second fan assembly is further installed in the housing, and the second fan assembly is located between the light source assembly and the second side of the housing and is used for drawing out the heat dissipation airflow at the light source assembly.

In some possible embodiments of the present application, a third fan assembly is further installed in the housing, and the third fan assembly is located between the lens assembly and the third side of the housing and is used for drawing out the heat dissipation airflow at the lens assembly.

In some possible embodiments of the present application, a heat insulating member is further installed in the housing, and the heat insulating member is used for isolating a heat dissipation airflow in the housing, whose temperature is higher than that of the lens assembly, from blowing toward the lens assembly.

In some possible embodiments of the present application, the thermal insulation member is a partition plate disposed between the light source assembly and the lens assembly.

In some possible embodiments of the present application, an upper edge of the thermal insulation member is in sealing connection with a top plate of the housing, and a lower edge of the thermal insulation member is in sealing connection with a bottom plate of the housing.

In some possible embodiments of the present application, a plurality of circuit boards are further installed in the housing, and the circuit boards and the light source assembly are respectively located on two sides of the lens assembly.

In some possible embodiments of the present application, the plurality of circuit boards are located between the lens assembly and the air inlet side of the third fan assembly.

In some possible embodiments of the present disclosure, the light source assembly and the optical-mechanical assembly are disposed side by side and both perpendicular to the lens assembly; still install the laser radiator in the casing, the laser radiator is located light source subassembly department and with lens subassembly parallel arrangement, so that the laser radiator, light source subassembly, ray apparatus subassembly and lens subassembly are the U-shaped range.

In some possible embodiments of the present application, the housing is a rectangular parallelepiped, the lens assembly and the light source assembly are both disposed along a short side direction of the housing, the optical-mechanical assembly is disposed along a long side direction of the housing, the first side is a first long side of the housing close to the optical-mechanical assembly, and the second side and the third side are two short sides of the housing respectively; the first fan assembly comprises an air inlet fan, the second fan assembly and the third fan assembly comprise two air outlet fans, the two air outlet fans in the second fan assembly are arranged at intervals along the second side of the shell, the two air outlet fans in the third fan assembly are arranged at intervals along the third side of the shell, and the air inlet fans and the four air outlet fans are axial flow fans.

In some possible embodiments of the present application, the lens in the lens assembly is an ultra-short focus projection lens.

Compared with the prior art, when the laser projection device provided by the embodiment of the application runs, the first fan assembly and the flow guide piece are started, cold air outside the shell enters the shell through the first side of the shell under the action of the first fan assembly to form heat dissipation airflow, part of the heat dissipation airflow is guided to the light source assembly to exchange heat with the light source assembly, heat generated by the light source assembly is taken away by the part of the heat dissipation airflow and is led out through the second side of the shell, and heat dissipation of the light source assembly is achieved; the other part of the heat dissipation airflow in the shell is guided to the optical-mechanical assembly and the lens assembly by the flow guide piece, the heat generated by the optical-mechanical assembly and the heat of the lens assembly are taken away by the part of the heat dissipation airflow and then are guided out through the third side of the shell, and the heat dissipation of the optical-mechanical assembly and the lens assembly is achieved. Because the first fan assembly and the flow guide piece in the embodiment of the application enable the heat dissipation path in the shell to be fork-shaped, such as Y-shaped or notch-shaped, the heat dissipation path can independently guide a part of heat dissipation airflow in the shell to the light source assembly and directly guide the heat dissipation airflow after heat dissipation, and the heat dissipation airflow after heat exchange with the light source assembly is directly guided out of the shell, so that the heat influence of the light source assembly on the optical machine assembly and the lens assembly is reduced; the other part heat dissipation air current in the casing is led to the ray apparatus subassembly that produces less heat and does not produce thermal lens subassembly by self, and this kind of heat dissipation route design rational distribution has the flow direction of heat dissipation air current for the influence of heat each other between light source subassembly, ray apparatus subassembly and the lens subassembly is less, and is all better to the radiating effect of light source subassembly, ray apparatus subassembly and lens subassembly, has reduced because of the light source subassembly makes the too high problem that leads to laser projection device's projection picture is easily fuzzy of lens subassembly temperature.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a laser projection apparatus according to an embodiment of the present application;

fig. 2 is a schematic structural view illustrating a U-shaped distribution of a light source module, an optical-mechanical module, and a lens module in a laser projection apparatus according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of an L-shaped distribution of a light source module, an optical-mechanical module, and a lens module in a laser projection apparatus according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a laser projection apparatus and a projection screen according to an embodiment of the present disclosure;

FIG. 5 is a second schematic structural diagram of a laser projection apparatus and a projection screen according to an embodiment of the present disclosure;

FIG. 6 is a schematic view illustrating a wind direction of a laser projection apparatus according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a laser projection apparatus according to an embodiment of the present application;

FIG. 8 is an exploded view of a portion of a laser projection apparatus according to an embodiment of the present disclosure;

FIG. 9 is a second exploded view of a portion of the components of a laser projection apparatus according to an embodiment of the present application;

FIG. 10 is a schematic diagram illustrating heat dissipation from a light source module and a laser heat sink in a laser projection apparatus according to an embodiment of the present disclosure;

fig. 11 is a schematic heat dissipation diagram of an optical-mechanical assembly and a DMD heat sink in a laser projection apparatus according to an embodiment of the disclosure;

FIG. 12 is a schematic diagram of a heat dissipation assembly of a thermal insulation member and a lens assembly of a laser projection apparatus according to an embodiment of the disclosure;

FIG. 13 is a schematic structural diagram of a portion of a component of a laser projection apparatus according to an embodiment of the present disclosure;

FIG. 14 is a second schematic perspective view of a laser projection apparatus according to an embodiment of the present application;

FIG. 15 is a third schematic perspective view of a laser projection apparatus according to an embodiment of the present application;

fig. 16 is a schematic structural view illustrating a U-shaped arrangement of a laser radiator, a light source module, an optical-mechanical module, and a lens module in a laser projection apparatus according to an embodiment of the present disclosure;

fig. 17 is a second schematic structural view illustrating a U-shaped arrangement of a laser radiator, a light source module, an optical-mechanical module, and a lens module in a laser projection apparatus according to the second embodiment of the present disclosure.

Reference numerals:

1000-laser projection device, 2000-projection screen, 1-shell, 11-bottom plate, 12-radiating hole, 2-laser radiator, 3-DMD radiator, 100-light source component, 200-optical machine component, 300-lens component, 400-circuit board, 500-first fan component, 600-second fan component, 700-third fan component, 800-wind guide fan, and 900-heat insulation component.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description of the present application, "and/or" is only one kind of association relationship describing an associated object, and means that three kinds of relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Referring to fig. 1, a laser projection apparatus 1000 according to an embodiment of the present disclosure includes a housing 1 of a whole apparatus, and the shape of the housing 1 may be various, such as a cube, a cuboid with rounded corners, and the like. The housing 1 shown in fig. 1 is a cuboid, and the housing 1 is provided with a first side 101, a second side 102, a third side 103 and a fourth side 104, wherein the first side 101 and the fourth side 104 are opposite and are two long sides of the housing 1 respectively, and the second side 102 and the third side 103 are opposite and are two short sides of the housing 1 respectively.

Referring to fig. 2, according to the optical functional portion, the laser projection apparatus 1000 according to the embodiment of the present application further includes a light source assembly 100, an optical mechanical assembly 200, and a lens assembly 300 assembled in the housing 1, the light source assembly 100, the optical mechanical assembly 200, and the lens assembly 300 are sequentially connected along the propagation direction of the light beam, that is, the optical mechanical assembly 200 connects the light source assembly 100 to the lens assembly 300, and the light source assembly 100, the optical mechanical assembly 200, and the lens assembly 300 respectively have corresponding housings to wrap the optical components, so as to support the optical components, and enable each optical portion to achieve a certain sealing or airtight requirement.

The arrows in fig. 2 show the propagation directions of light beams in the 3 optical components of the light source assembly 100, the optical-mechanical assembly 200 and the lens assembly 300 in the laser projection apparatus 1000.

The optical-mechanical assembly 200 and the lens assembly 300 are arranged side by side and along a first direction of the whole machine, for example, the first direction may be a width direction of the whole machine, or the first direction is opposite to a direction viewed by a user according to a use mode. The light source assembly 100 is located in a space enclosed by the optical-mechanical assembly 200, the lens assembly 300 and a part of the whole housing 1, and the light source assembly 100 is arranged along a second direction which is perpendicular to the first direction, i.e. the light source assembly 100, the optical-mechanical assembly 200 and the lens assembly 300 are arranged in an L shape. For example, the optical-mechanical assembly 200 and the lens assembly 300 shown in fig. 3 are arranged in a long side direction of an "L" shape, the light-mechanical assembly 100 is arranged in a short side direction of the "L", the long side direction of the "L" shape is a width direction of the housing 1, the short side direction of the "L" shape is a length direction of the housing 1, the optical-mechanical assembly 200 is located in a region close to the first side 101 in the housing 1, the light-mechanical assembly 100 is located on a side of the optical-mechanical assembly 200 close to the second side 102 of the housing 1, and the lens assembly 300 is located on a side of the optical-mechanical assembly 200 close to the third side 103 of.

In some embodiments, the light source assembly 100 and the lens assembly 300 may be further disposed in parallel along a first direction, and the first direction may be a width direction of the whole device or a length direction of the whole device. The light source assembly 100 is parallel to the lens assembly 300, the optical-mechanical assembly 200 is located on the same side of the light source assembly 100 and the lens assembly 300 and is disposed along a second direction, the second direction is perpendicular to the first direction, that is, the light source assembly 100, the optical-mechanical assembly 200 and the lens assembly 300 are arranged in a "U" shape, for example, the light source assembly 100 and the lens assembly 300 shown in fig. 2 are disposed along a width direction of the whole machine, the optical-mechanical assembly 200 is disposed along a length direction of the whole machine, the optical-mechanical assembly 200 is located in a region close to the first side 101 in the housing 1, the light source assembly 100 is located on one side of the optical-mechanical assembly 200 close to the second side 102 of the housing 1, and the lens assembly 300 is located on one.

In examples of the present application, the light source assembly 100 may include at least one laser, and the light source assembly 100 is configured to emit laser light of at least one color. The lasers may include a red laser, a blue laser, and a green laser, the red laser emitting a red laser, the blue laser emitting a blue green laser, the green laser emitting a green laser, and the light source assembly 100 is configured to provide a light source required by the laser projection apparatus 1000. Of course, the light source assembly 100 may also be a monochromatic laser light source or a two-color laser light source. Specifically, the light source assembly 100 has a first light outlet, and the surface where the first light outlet is located is the connection surface with the optical mechanical assembly 200, and by connecting the first light outlet and the optical mechanical assembly, the light source assembly 100 provides the illumination light beam for the optical mechanical assembly 200.

It should be noted that, according to the design of the illumination light path inside the optical-mechanical assembly 200, the optical-mechanical assembly 200 has a light inlet and a second light outlet, wherein the light inlet of the optical-mechanical assembly 200 is connected to the first light outlet of the light source assembly 100, and the second light outlet of the optical-mechanical assembly 200 is connected to the lens assembly 300.

The optical-mechanical assembly 200 is configured to modulate a light beam to generate an image light beam when the light beam emitted from the light source assembly 100 is irradiated, wherein the optical-mechanical assembly 200 includes a DMD chip (Digital micro mirror Device), the DMD chip is an optical semiconductor module, and the DMD chip processes and projects light in a Digital manner.

The lens assembly 300 is used for projecting the image light beam output by the optical-mechanical assembly 200 onto the projection screen 2000, as shown in fig. 4 and 5; the lens in the lens assembly 300 may be an ultra-short focus projection lens.

For the solution that the light source module 100, the optical-mechanical module 200, and the lens module 300 are arranged in an "L" shape, the light inlet and the second light outlet of the optical-mechanical module 200 are generally located on different sides of the optical-mechanical module 200 in a vertical relationship, where the vertical is a vertical in a spatial position relationship, and the different sides may be different sides of the rectangular optical-mechanical module 200 or different sides of an irregular three-dimensional structure.

For the scheme that the light source module 100, the optical-mechanical module 200, and the lens module 300 are arranged in a "U" shape, the light inlet and the second light outlet of the optical-mechanical module 200 are generally located on different sides of the optical-mechanical module 200 in a parallel relationship, where the parallel is a parallel in a spatial position relationship, and the different sides may be different sides of the rectangular optical-mechanical module 200 or different sides of an irregular three-dimensional structure.

The light source assembly 100, the optical engine assembly 200 and the lens assembly 300 are arranged in an L shape or in a U shape, and the light source assembly 100 and the lens assembly 300 are arranged at intervals, so that the design and installation of other components in the housing 1 are facilitated, and the laser projection device 1000 is reasonable and compact in structural design.

In fig. 2, a plurality of circuit boards 400 are disposed in a space enclosed by the housing 1 of the optical module 200, the lens module 300 and another part of the whole device, the circuit boards 400 are electrically connected to the light source module 100, and the circuit boards 400 and the light source module 100 are respectively disposed at two sides of the lens module 300. The plurality of circuit boards 400 include a power supply board, a TV board, a control board, a display board, and the like, and the plurality of circuit boards 400 may be stacked in parallel with the bottom plate 11 of the casing 1, or may be partially disposed along the bottom plate 11 of the casing 1 and partially disposed vertically along the side plates of the casing 1. The plurality of circuit boards 400 are arranged in a concentrated manner, and the optical parts are arranged along the length direction of the whole machine.

In fig. 1 and 2, the plurality of circuit boards 400 are disposed in a space enclosed by the lens assembly 300 and the housing 1 of another part of the whole device, and the plurality of circuit boards 400 and the light source assembly 100 are respectively disposed at two sides of the lens assembly 300. The plurality of circuit boards 400 may be stacked parallel to the bottom plate 11 of the housing 1, or may be partially disposed along the bottom plate 11 of the entire housing 1 and partially disposed vertically along the side plates of the entire housing 1. The plurality of circuit boards 400 are arranged in a concentrated manner, and the optical parts are arranged along the length direction of the whole machine.

Because the light source assembly 100 generates a large amount of heat during operation, which has a great influence on the lens assembly 300, especially in the scheme that the light source assembly 100, the optical-mechanical assembly 200, and the lens assembly 300 shown in fig. 2 are arranged in a "U" shape, the distance between the light source assembly 100 and the lens assembly 300 is short, the light source assembly 100 easily makes the lens assembly 300 easily have too high temperature, and thus the projection image of the laser projection apparatus 1000 easily becomes blurred. Therefore, referring to fig. 1, 6 and 7, the laser projection apparatus 1000 in the embodiment of the present application further includes a first fan assembly 500 and a flow guiding member, the first fan assembly 500 is configured to guide air into the housing 1 from the first side 101 to form a heat dissipation airflow, the heat dissipation airflow is guided out through the second side 102 of the housing 1 after blowing to the light source assembly 100, and the flow guiding member is configured to guide the heat dissipation airflow to the optical mechanical assembly 200 and the lens assembly 300 and then is guided out through the third side 103 of the housing 1.

When the first fan assembly 500 and the air guide member operate, cold air outside the housing 1 enters the housing 1 through the first side 101 of the housing 1 under the action of the first fan assembly 500 to form a heat dissipation airflow, a part of the heat dissipation airflow is guided to the light source assembly 100 to exchange heat with the light source assembly 100, heat generated by the light source assembly 100 is taken away by the part of the heat dissipation airflow and is led out through the second side 102 of the housing 1, and heat dissipation of the light source assembly 100 is realized; another part of the heat dissipation airflow in the housing 1 is guided to the opto-mechanical assembly 200 and the lens assembly 300 by the guiding member, and the heat generated by the opto-mechanical assembly 200 and the heat of the lens assembly 300 are both taken away by the part of the heat dissipation airflow and then guided out through the third side 103 of the housing 1, so that the heat dissipation of the opto-mechanical assembly 200 and the lens assembly 300 is realized. Because the first fan assembly 500 and the flow guiding element in the embodiment of the present application make the heat dissipation path in the housing 1 in a fork shape, such as a "Y" shape or a "notch" shape, the heat dissipation path can independently guide a part of the heat dissipation airflow in the housing 1 to the light source assembly 100, and directly guide the heat dissipation airflow after heat dissipation, and the heat dissipation airflow after heat exchange with the light source assembly is directly guided out of the housing, thereby reducing the heat influence of the light source assembly 100 on the optical machine assembly 200 and the lens assembly 300; the other part of the heat dissipation airflow in the housing 1 is guided to the optical-mechanical assembly 200 with less heat generation and the lens assembly 300 without heat generation, and the heat dissipation path is designed to reasonably distribute the flow of the heat dissipation airflow, so that the mutual heat influence among the light source assembly 100, the optical-mechanical assembly 200 and the lens assembly 300 is small, the heat dissipation effects on the light source assembly 100, the optical-mechanical assembly 200 and the lens assembly 300 are good, and the problem that the projection picture of the laser projection device 1000 is easily blurred due to the fact that the light source assembly 100 causes the lens assembly 300 to have too high temperature is solved.

The first fan assembly 500 may be disposed at different positions in the housing 1 according to different arrangements of the light source assembly 100, the optical-mechanical assembly 200 and the lens assembly 300. For example, referring to fig. 1, 6, 8 to 9, the first fan assembly 500 is located between the optical-mechanical assembly 200 and the first side 101 of the housing 1, an air inlet side of the first fan assembly 500 faces the first side 101 of the housing 1, and an air outlet side of the first fan assembly 500 faces an area of the optical-mechanical assembly 200 close to the light source assembly 100, so that more heat dissipation air flows in the housing 1 can be guided to the light source assembly 100, and the heat dissipation effect on the laser in the light source assembly 100 is better; for another example, the first fan assembly 500 is located between the first side 101 of the housing 1 and the light source assembly 100, the air inlet side of the first fan assembly 500 faces the first side 101 of the housing 1, the air outlet side of the first fan assembly 500 faces the light source assembly 100, and all the outlet air of the first fan assembly 500 is directed to the light source assembly 100.

The above-mentioned design scheme of water conservancy diversion spare has the multiple, and if the water conservancy diversion spare is the guide plate, the DMD chip department in opto-mechanical subassembly 200 is installed to the guide plate, and the guide plate is buckled to the curved surface structure that can lead the radiating air current in the casing 1 to opto-mechanical subassembly 200 and lens subassembly 300, and its structure is simpler. For another example, referring to fig. 1, 11, 14, and 15, the guiding member is a guiding fan 800, the guiding fan 800 is installed at the optical engine assembly 200 (specifically, at the DMD chip, the heat near the DMD chip is high), the air inlet direction of the guiding fan 800 is perpendicular to the air outlet direction of the first fan assembly 500, and the air outlet side of the guiding fan 800 faces the lens assembly 300, that is, the guiding fan 800 can accelerate the guiding of part of the air outlet of the first fan assembly 500 to the optical engine assembly 200 and the lens assembly 300, the guiding fan 800 accelerates the heat dissipation of the DMD chip, and ensures that the amount of cool air blowing to the optical engine assembly 200 and the lens assembly 300 is sufficient, so that the heat dissipation effect on the DMD chip and the lens assembly 300 is good.

Referring to fig. 1, 6 and 10, in the embodiment of the present application, a second fan assembly 600 is further installed in the casing 1, the second fan assembly 600 is located between the light source assembly 100 and the second side 102 of the casing 1, and the second fan assembly 600 is used for extracting the heat dissipation airflow at the light source assembly 100, so that the flow rate of the heat dissipation airflow at the light source assembly 100 can be increased, and the heat dissipation effect on the light source assembly 600 is improved.

Referring to fig. 1, 6 and 12, in the embodiment of the present application, a third fan assembly 700 is further installed in the housing 1, and the third fan assembly 700 is located between the lens assembly 300 and the third side 103 of the housing 1 and is used for drawing out the heat dissipation airflow at the lens assembly 300, so that the flow rate of the heat dissipation airflow near the lens assembly 300 can be increased, and the heat dissipation effect on the light source assembly 600 is improved.

It should be noted that, the housing 1 is provided with a plurality of heat dissipation holes 12, according to the difference of distribution areas, the plurality of heat dissipation holes 12 are divided into a first portion, a second portion and a third portion, the first portion of the plurality of heat dissipation holes 12 is disposed near the air intake side of the first fan assembly, the second portion of the plurality of heat dissipation holes 12 is disposed near the air outlet side of the second fan assembly 600, and the third portion of the plurality of heat dissipation holes 12 is disposed near the air outlet side of the third fan assembly 700. Other areas on the shell 1 are sealed.

Referring to fig. 13, in the embodiment of the present application, a heat insulating member 900 is further installed in the housing 1, the heat insulating member 900 is used for isolating heat dissipation airflow with a temperature higher than that of the lens assembly 300 in the housing 1 from blowing toward the lens assembly 300, the heat dissipation airflow with a temperature higher than that of the lens assembly 300 after heat exchange with other components (such as the light source assembly 100 and the optical-mechanical assembly 200) in the housing 1 is blocked by the heat insulating member 900, heat exchange between the other components and the lens assembly 300 is reduced, thereby reducing heat influence on the lens assembly 300 by the other components in the housing 1, lowering the temperature of the lens assembly 300, and ensuring that a projection image of the whole device is clear and stable.

Since the heat of the light source assembly 100 in the housing 1 is relatively high, in some embodiments of the present application, the light source assembly 100, the optical-mechanical assembly 200 and the lens assembly 300 are arranged in a "U" shape, and the heat insulation member 900 may be a partition plate disposed between the lens assembly 300 and the light source assembly 100, and has a relatively simple structure. Of course, the heat insulation member 900 may be a wind shield plate covering the lens module 300.

For the solution that the thermal insulation piece 900 is a partition, the upper edge of the thermal insulation piece 900 is connected to the top plate of the housing 1, the lower edge of the thermal insulation piece 900 is connected to the bottom plate 11 of the housing 1, and both the upper edge of the thermal insulation piece 900 and the lower edge of the thermal insulation piece 900 are connected to the inner wall of the housing 1, so as to avoid the air flow between the light source assembly 100 and the lens assembly 300.

In addition, the heat insulating material 900 is made of a heat insulating material, so that it has a good heat insulating effect, and the heat influence of the light source assembly 100 on the lens assembly 300 can be further reduced. The heat insulation member 900 may be made of metal or hard plastic, so that the heat insulation member 900 has a good heat insulation effect.

It should be noted that, in order to further avoid the problem of air leakage at the connection between the upper edge of the heat insulating material 900 or the lower edge of the heat insulating material 900 and the inner wall of the housing 1, a sealing member may be disposed between the heat insulating material 900 and the inner wall of the housing 1, and the sealing member can seal the upper edge of the heat insulating material 900 and the inner wall of the top plate of the housing 1, and seal the lower edge of the heat insulating material 900 and the inner wall of the bottom plate 11 of the housing 1, so that the air-proof effect between the light source assembly 100 and the lens assembly 300 is better. For example, the seal may be a tampon.

The above-mentioned thermal insulation piece 900 needs to have a gap with the lens assembly 300 and the light source assembly 100 to avoid the influence of the thermal insulation piece 900 on the lens assembly 300 and the light source assembly 100, and the thermal insulation piece 900 in the embodiment of the present application is disposed at an interval with the lens assembly 300 and the light source assembly 100.

Based on the above, considering that the components in the housing 1 of the laser projection apparatus 1000 are mounted compactly, the gap between the thermal insulation member 900 and the light source assembly 100 and the gap between the thermal insulation member 900 and the lens assembly 300 can be designed to be larger than 2mm while satisfying the mounting requirements of other components.

For the solution that the heat insulation piece 900 is a partition, if the thickness of the heat insulation piece 900 is too small, the heat insulation effect is poor; if the thickness of the thermal insulation member 900 is too large, installation of other components may be affected and costs may be increased. Therefore, the thickness of heat insulating part 900 is 1 ~ 3mm in this application embodiment, and if the thickness of heat insulating part 900 is 2mm, can be on the basis of guaranteeing not to influence the installation of other parts, thermal-insulated effect is better.

In the embodiment of the present application, the plurality of circuit boards 400 are located between the lens assembly 300 and the air inlet side of the third fan assembly 700, the third fan assembly 700 can further draw the heat dissipation airflow at the lens assembly 300 to the plurality of circuit boards 400, and then draw the heat dissipation airflow between the plurality of circuit boards 400, and finally guide the heat dissipation airflow out of the housing 1, the third fan assembly 700 can promote the forced heat exchange between the plurality of circuit boards 400 and the heat dissipation airflow, because the heat at the lens assembly 300 is low, the temperature of the heat dissipation airflow guided out from the lens assembly 300 is low, and the heat dissipation airflow is used for dissipating heat of the plurality of circuit boards 400, so that fewer fans can be used for dissipating heat of each component in the housing 1, thereby not only ensuring the heat dissipation effect of the plurality of circuit boards 400, but also reducing the cost.

It should be noted that, the circuit boards 400 are all stacked and arranged in parallel, the plane where the circuit board 400 is located is parallel to the air inlet direction of the third fan assembly 700, and when the third fan assembly 700 draws the heat dissipation airflow among the circuit boards 400, the resistance is small, so that the third fan assembly 700 can smoothly take out the heat dissipation airflow with higher temperature among the circuit boards 400 in a sweeping manner, and the effect of simultaneously dissipating heat of the circuit boards 400 is better. The plurality of circuit boards 400 in fig. 15 are each disposed parallel to the bottom plate 11 of the housing 1.

Fig. 15 shows the light source assembly 100 positioned at the left side in the housing 1, the lens assembly 300 positioned at the right side in the housing 1, and the plurality of circuit boards 400 positioned at the right side of the lens assembly 300; of course, the positions of the light source assembly 100 and the lens assembly 300 can be interchanged, that is, the light source assembly 100 is located on the right side in the housing 1, and the lens assembly 300 is located on the left side in the housing 1, and accordingly, the circuit boards 400 are also adjusted to the left side in the housing 1, so as to ensure that the circuit boards 400 are always located on the side of the lens assembly 300 away from the light source assembly 100.

In the embodiment of the present application, the numbers of the first fan assembly 500, the second fan assembly 600, the third fan assembly 700, and the wind guiding fan 800 are not limited.

The first fan assembly 500 in fig. 15 includes 1 air inlet fan, the second fan assembly 600 and the third fan assembly 700 both include two air outlet fans, the two air outlet fans in the second fan assembly 600 are disposed at intervals along the second side of the casing, the two air outlet fans in the third fan assembly 700 are disposed at intervals along the third side of the casing, the number of the air guide fans 800 is also one, and the air guide fan 800, the air inlet fan and the four air outlet fans are axial fans.

Two air inlet fans in the above-mentioned first fan assembly 500, two air outlet fans in the second fan assembly 600, two air outlet fans in the third fan assembly 700 and wind guide fan 800 are axial fans, and flow guide fan 800, air inlet fan and four air outlet fans are all perpendicular to the bottom plate 11 of the housing 1 and are arranged, and its structure is simpler and installation is more convenient.

The heat generated by the light source assembly 100 needs to be processed by a special heat sink, and especially, the heat of the red laser in the light source assembly 100 can seriously affect the light emitting efficiency if the heat cannot be dissipated in time in the working process of the red laser. The laser projection device 1000 in the embodiment of the present application further includes the laser radiator 2, the laser radiator 2 is located between the light source assembly 100 and the second fan assembly 600, and the laser radiator 2 can be specially used for heat dissipation of the light source assembly 100, so that the heat dissipation effect of the light source assembly 100 is good.

The laser projection apparatus 1000 shown in fig. 8, 9 and 15 is provided with the laser radiator 2 including the first heat pipe, the first heat-conducting metal block and the first heat-dissipating fin, the first heat-conducting metal block is attached to the laser in the light source module 100, the first heat-conducting metal block transfers heat of the light source module 100 to the first heat pipe, the first heat pipe transfers heat to the first heat-dissipating fin, the heat of the light source module 100 is led out of the housing 1 by using the convection action of the second fan module 600, heat dissipation of the light source module 100 is realized, and the heat dissipation effect is good.

Because the DMD chip in the above-mentioned optical mechanical assembly 200 also can produce more heat in the course of the work, so, laser projection device 1000 in this application embodiment still includes the DMD radiator 3 of installing in DMD chip department, and DMD radiator 3 is used for dispelling the heat to the DMD chip specially for the radiating effect to the DMD chip is better.

The DMD heat sink 3 shown in fig. 8, 9 and 14 includes a second heat conducting metal block and a second heat dissipating fin, the second heat conducting metal block is attached to the DMD chip, the second heat conducting metal block transfers the heat of the DMD to the second heat dissipating fin, the heat of the DMD is transferred to the circuit board 400 by the air volume of the air guiding fan 800, and then the heat is brought to the outside of the housing 1 by the third fan assembly 700, so that the heat dissipating effect is good.

For the laser projection apparatus 1000 being an ultra-short focus projection apparatus, the light source assembly 100 and the optical-mechanical assembly 200 are disposed side by side and perpendicular to the lens assembly 300; the laser heat sink 3 is located at the light source assembly 100 and opposite to the lens assembly 300, so that the laser heat sink 3, the light source assembly 100, the optical-mechanical assembly 200 and the lens assembly 300 are arranged in a U-shape, as shown in fig. 16 and 17.

To further explain the heat dissipation effect of the present invention, a comparative test is performed based on a scheme that the light source module 100, the optical-mechanical module 200, and the lens module 300 are arranged in a "U" shape in the laser projection apparatus 1000 shown in fig. 15, where scheme a is a heat dissipation structure having the heat insulation member 900, the first fan module 500, the wind guiding fan 800, the second fan module 600, and the third fan module 700 shown in fig. 15, scheme B is a heat dissipation structure having the wind guiding fan 800, the second fan module 600, and the third fan module 700 shown in fig. 15, the second fan module 600 is a wind inlet fan, the third fan module 700 is a wind outlet fan, wind directions of the second fan module 600, the wind guiding fan 800, and the third fan module 700 are from left to right, scheme C is a heat dissipation structure having the wind guiding fan 800, the second fan module 600, and the third fan module 700 shown in fig. 15, the third fan assembly 700 is used as an air inlet fan, the second fan assembly 600 is used as an air outlet fan, the wind directions of the second fan assembly 600, the wind guiding fan 800 and the third fan assembly 700 are from right to left, the environmental temperature of the test is set to be 25 ℃, the first fan assembly 500, the wind guiding fan 800, the second fan assembly 600 and the third fan assembly 700 are all 1500RPM (rotations Per Minute), and the test result is as follows:

table 1 comparative test results

As can be seen from table 1, the scheme a can simultaneously keep the temperature of each lens in the light source assembly 100 and the lens assembly 300 at a lower level, and the heat dissipation effect of the whole machine is better; in the scheme B, the heat insulation member 900 between the lens assembly 300 and the light source assembly 100 is removed, the temperature of each lens in the lens assembly 300 is higher, but the temperature of the light source assembly 100 can be kept at a lower level, and only the heat dissipation effect on the light source assembly 100 is better; in the solution C, the heat insulation member 900 on the lens assembly 300 is removed, and the wind direction in the housing 1 is set from the circuit board 400 to the light source assembly 100, the temperature of each lens in the lens assembly 300 is low, but the temperature of the light source assembly 100 is high, and only the heat dissipation effect on the lens assembly 300 is good.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a laser projection device which characterized in that, includes the casing, install in the casing:

a light source assembly for providing an illumination beam to the light engine assembly;

the lens assembly is used for projecting and imaging the image light beam output by the optical-mechanical assembly;

the optical-mechanical assembly is connected between the light paths of the light source assembly and the lens assembly and is used for modulating the illumination light beams provided by the light source assembly to generate image light beams; the optical-mechanical assembly is positioned in the area, close to the first side, in the shell and arranged along the extending direction of the first side, the light source assembly is positioned on one side, close to the second side of the shell, of the optical-mechanical assembly, the lens assembly is positioned on one side, close to the third side of the shell, of the optical-mechanical assembly, and the second side is opposite to the third side and is intersected with the first side;

the first fan assembly is used for guiding air into the shell from a first side to form heat dissipation airflow, and the heat dissipation airflow is blown to the light source assembly and then is guided out from a second side of the shell;

and the flow guide piece is used for guiding the heat dissipation airflow to the optical machine component and the lens component and then guiding the heat dissipation airflow out from the third side of the shell.

2. The laser projection device of claim 1, wherein the light source module is parallel to the lens module, and the optical-mechanical module is vertically disposed on the same side of the light source module and the lens module to form a U-shaped arrangement;

or the lens assembly and the optical-mechanical assembly are arranged side by side and are perpendicular to the light source assembly so as to be arranged in an L shape.

3. The laser projection apparatus of claim 2, wherein the first fan assembly is located between the optical-mechanical assembly and the first side of the housing, an air inlet side of the first fan assembly faces the first side of the housing, and an air outlet side of the first fan assembly faces an area on the optical-mechanical assembly near the light source assembly.

4. The laser projection device of claim 3, wherein the diversion member is a diversion fan installed at the optical-mechanical assembly, an air inlet direction of the diversion fan is perpendicular to an air outlet direction of the first fan assembly, and an air outlet side of the diversion fan faces the lens assembly.

5. A laser projection device as claimed in claim 1, wherein further mounted within the housing:

the second fan assembly is located between the light source assembly and the second side of the shell and used for extracting the heat dissipation airflow at the light source assembly.

6. A laser projection device as claimed in claim 5, wherein further mounted within the housing:

and the third fan assembly is positioned between the lens assembly and the third side of the shell and is used for extracting the heat dissipation airflow at the lens assembly.

7. The laser projection device of any one of claims 1 to 6, wherein the housing further comprises:

the heat insulation piece is used for isolating the heat dissipation airflow with the temperature in the shell higher than that of the lens assembly from blowing towards the lens assembly.

8. The laser projection device of claim 7, wherein the thermal insulation member is a spacer disposed between the light source assembly and the lens assembly.

9. The laser projection device of claim 8, wherein an upper edge of the thermal shield is sealingly coupled to a top plate of the housing and a lower edge of the thermal shield is sealingly coupled to a bottom plate of the housing.

10. A laser projection device as claimed in claim 6, wherein further mounted within the housing:

the circuit boards and the light source assembly are respectively positioned on two sides of the lens assembly.

11. The laser projection device of claim 10, wherein the plurality of circuit boards are each positioned between the lens assembly and the air intake side of the third fan assembly.

12. The laser projection device according to any one of claims 1 to 6, wherein the light source assembly and the optical-mechanical assembly are arranged side by side and are both perpendicular to the lens assembly;

still install the laser radiator in the casing, the laser radiator is located light source subassembly department and with lens subassembly parallel arrangement, so that the laser radiator, light source subassembly, ray apparatus subassembly and lens subassembly are the U-shaped range.

13. The laser projection device according to claim 6, wherein the housing is a rectangular parallelepiped, the lens assembly and the light source assembly are both disposed along a short side direction of the housing, the opto-mechanical assembly is disposed along a long side direction of the housing, the first side is a first long side of the housing close to the opto-mechanical assembly, and the second side and the third side are two short sides of the housing respectively;

the first fan assembly comprises an air inlet fan, the second fan assembly and the third fan assembly comprise two air outlet fans, the two air outlet fans in the second fan assembly are arranged at intervals along the second side of the shell, the two air outlet fans in the third fan assembly are arranged at intervals along the third side of the shell, and the air inlet fans and the four air outlet fans are axial flow fans.

14. The laser projection device of any one of claims 1 to 6, wherein the lens in the lens assembly is an ultra-short focus projection lens.