CN220121128U - Optical machine and projection system - Google Patents

Abstract

The utility model proposes a light engine comprising: the device comprises a shell, a spatial light modulator, a fixing piece, an annular sealing gasket, a circuit board, a pressing plate and a radiator. The spatial light modulator is arranged in the shell, and is provided with a radiating surface and a side surface, and the side surface is connected with the radiating surface and surrounds the radiating surface; the fixing piece is arranged on the shell and is abutted against the radiating surface, and the fixing piece is provided with a first through hole; the annular sealing gasket is provided with convex ribs and pressing points, the convex ribs are arranged around the spatial light modulator, the pressing points are abutted against the side surface of the spatial light modulator, and at least two dispensing points are arranged between the convex ribs and the spatial light modulator; the circuit board is arranged on one side of the fixing piece far away from the spatial light modulator, the spatial light modulator is electrically connected with the circuit board, and the circuit board is provided with a second through hole corresponding to the first through hole; the pressing plate is pressed against the circuit board; the radiator is arranged on the shell and conducts heat through the first through hole and the second through hole. The utility model also provides a projection system.

Description

Optical machine and projection system

Technical Field

The utility model relates to the technical field of projection, in particular to a light machine and a projection system.

Background

With the vigorous development trend of new energy automobiles, market share of the new energy automobiles is continuously expanded, so that some related electric equipment can be used on the automobiles, such as vehicle-mounted projection display equipment and the like, and the automobile-using experience of customers can be remarkably improved. Compared with the conventional projection display device, the vehicle-mounted device has more severe requirements on mechanical impact, high-low temperature impact and the like, and the structure such as a spatial light modulator and the like in the device needs higher installation precision and a certain impact resistance.

Disclosure of Invention

The embodiment of the utility model provides a light machine and a projection system, so as to improve the technical problems.

In a first aspect, the present utility model proposes a light engine comprising: the device comprises a shell, a spatial light modulator, a fixing piece, an annular sealing gasket, a circuit board, a pressing plate and a radiator. The spatial light modulator is arranged in the shell, and is provided with a radiating surface and a side surface, and the side surface is connected with the radiating surface and surrounds the radiating surface; the fixing piece is arranged on the shell and is abutted against the radiating surface, and the fixing piece is provided with a first through hole; the annular sealing gasket is provided with convex ribs and pressing points, the convex ribs are arranged around the spatial light modulator, the pressing points are abutted against the side surface of the spatial light modulator, and at least two dispensing points are arranged between the convex ribs and the spatial light modulator; the circuit board is arranged on one side of the fixing piece far away from the spatial light modulator, the spatial light modulator is electrically connected with the circuit board, and the circuit board is provided with a second through hole corresponding to the first through hole; the pressing plate is pressed against the circuit board; the radiator is arranged on the shell and conducts heat through the first through hole and the second through hole.

In some embodiments, at least two of the dispensing points are arranged angularly symmetrically.

In some embodiments, the heat sink has a thermally conductive boss embedded in the first and second through holes and adjacent to the heat dissipating surface.

In some embodiments, the thermally conductive boss is spaced from the heat dissipating surface by a distance of 0.2-0.3mm.

In some embodiments, the heat sink further comprises an elastic thermal pad disposed between the heat dissipating surface and the thermal boss.

In some embodiments, the elastic thermal pad has a thickness of 0.4-0.6mm.

In some embodiments, the optical engine further comprises a press pad disposed between the press plate and the circuit board.

In some embodiments, the housing is provided with at least one first positioning column, the fixing piece is provided with a first positioning hole, and the first positioning column is arranged in the first positioning hole in a penetrating mode.

In some embodiments, the optical engine further includes a first locking member, at least two first fixing holes are disposed at the edge of the pressing plate, and the locking member penetrates through the fixing holes and is connected to the housing.

In a second aspect, the present utility model provides a projection system, which includes an optical engine as described above.

According to the optical machine provided by the embodiment of the utility model, the fixing piece and the annular sealing gasket are arranged, and the fixing piece is arranged on the shell and is abutted against the radiating surface of the spatial light modulator, so that the radiating effect is improved, and meanwhile, the mounting precision of the spatial light modulator is ensured. Meanwhile, the annular sealing gasket comprises the convex ribs and the pressing points, the convex ribs and the pressing points are abutted against the spatial light modulator, so that the installation precision of the spatial light modulator is further improved, a certain damping effect is achieved, and the impact resistance of the projection system is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic exploded view of a light engine according to an embodiment of the present utility model;

FIG. 2 is a schematic view of an annular gasket in an optical engine according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a part of a light machine according to an embodiment of the present utility model;

fig. 4 is a partial cross-sectional view of a light engine according to an embodiment of the present utility model.

Detailed Description

In order to make the present utility model better understood by those skilled in the art, the following description of the present utility model will be made in detail with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which a person skilled in the art would obtain without making any inventive effort, are within the scope of the utility model.

In the present utility model, the terms "mounted," "connected," "secured," and the like are to be construed broadly unless otherwise specifically indicated or defined. For example, the connection can be fixed connection, detachable connection or integral connection; can be mechanically or electrically connected; the connection may be direct, indirect, or internal, or may be surface contact only, or may be surface contact via an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for understanding as a specific or particular structure. The description of the terms "some embodiments," "other embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In the present utility model, the schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples of the present utility model and features of various embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The present utility model proposes a projection system comprising an optical engine 100.

Referring to fig. 1, a light engine 100 includes a housing 10, a spatial light modulator 20, a fixing member 30, an annular sealing pad 40, a circuit board 50, a pressing plate 60 and a heat sink 70.

The housing 10 has an internal cavity 11 formed therein. The housing 10 may be a housing 10 formed by splicing a plurality of plates 12, and the plurality of plates 12 enclose an inner cavity 11. Inert gas can be filled in the inner cavity 11 to protect parts in the inner cavity 11 and slow down the oxidation of the parts. Of course, the interior of the content chamber 11 may also be configured as a vacuum environment to reduce the effect of the gas on the light path.

The spatial light modulator 20 can modulate a certain parameter of the light field by liquid crystal molecules under active control, for example, modulating the amplitude of the light field, modulating the phase by refractive index, modulating the polarization state by rotation of the polarization plane, or realizing conversion of incoherent-coherent light, so as to write certain information into the light wave, thereby achieving the purpose of light wave modulation. The method can conveniently load information into a one-dimensional or two-dimensional light field, and can rapidly process the loaded information by utilizing the advantages of wide bandwidth of light, multichannel parallel processing and the like. It is a core device constituting a system for real-time optical information processing, optical interconnection, optical computing, etc.

In the present utility model, the spatial light modulator 20 is mounted within the housing 10. The spatial light modulator 20 generates heat during operation. Therefore, the spatial light modulator 20 has a heat radiation surface 21 and a side surface 22, and the side surface 22 is connected to the heat radiation surface 21 and surrounds the heat radiation surface 21, and the heat radiation surface 21 is used for radiating heat of the spatial light modulator 20 in operation.

Since the spatial light modulator 20 is located in the optical path, the positional accuracy of the spatial light modulator 20 has a great influence on the accuracy of the light emitted from the optical machine 100, so that the spatial light modulator 20 has a high requirement on the accuracy of installation in the process of installation. Therefore, the optical machine 100 further includes a fixing member 30 in the present embodiment, where the fixing member 30 is used to fix the spatial light modulator 20, and enables the spatial light modulator 20 to have high mounting accuracy.

Specifically, the fixing member 30 is fixedly mounted to the housing 10 and abuts against the heat dissipating surface 21. The mounting accuracy of the spatial light modulator 20 is limited by abutting the heat radiation surface 21. In this embodiment, in order to ensure the heat dissipation effect of the heat sink 70, the fixing member 30 is further provided with a first through hole 31 for avoiding the heat sink 70, and the heat sink 70 conducts heat between the first through hole 31 and the heat dissipation surface 21.

The fixing member 30 is required to be mounted with a certain mounting accuracy so that the spatial light modulator 20 abutted against the fixing member 30 can be mounted with a certain mounting accuracy. Therefore, in the present embodiment, at least one positioning hole is further provided on the housing 10, and the fixing member 30 is provided with the first positioning post 32, so that when the fixing member 30 is mounted on the housing 10, the first positioning post 32 penetrates through the first positioning hole, so as to ensure the mounting accuracy when the fixing member 30 is mounted on the housing 10.

The annular seal 40 serves to close the space between the spatial light modulator 20 and the housing 10 and further serves to locate the spatial light modulator 20. Specifically, referring to fig. 3, the annular gasket 40 is provided with ribs 41 and pressure points 42. The bead 41 is configured as a ring, with the pressure points 42 being located in the ring portion of the ring-like structure formed by the approach. Referring to fig. 4, an annular rib 41 is disposed around the spatial light modulator 20, and the pressure point 42 abuts the side 22 of the spatial light modulator 20. With such a design, the pressure point 42 can be brought into contact with the spatial light modulator 20 in advance during the process of mounting the spatial light modulator 20, to achieve fixation of the spatial light modulator 20. Meanwhile, the pressure points 42 are abutted against the spatial light modulator 20, so that a certain damping effect can be exerted on the spatial light modulator 20 when the spatial light modulator 20 is subjected to vibration or impact. The ribs 41 may be fixed to the spatial light modulator 20 by dispensing. In this embodiment, at least two dispensing points are disposed between the rib 41 and the spatial light modulator 20, and the two dispensing points are located as far apart as possible, so as to fix the spatial light modulator 20 and avoid rotation thereof. As an embodiment, the positions of the two dispensing points may be arranged in an angular symmetry manner, so that the stress conditions of the two dispensing points are relatively uniform, and accordingly, the diagonal positions of the spatial light modulator 20 are provided with two dispensing slots. Of course, in other embodiments, the dispensing points may be provided with more, and the specific number is not limited herein.

Referring to fig. 4, the circuit board 50 is disposed on a side of the fixing member 30 away from the spatial light modulator 20. In this embodiment, the circuit board 50 may be electrically connected to the spatial light modulator 20, and the circuit board 50 may be used to supply or control the spatial light modulator 20. The circuit board 50 may be a PCB circuit board, which has a certain structural strength, so that the PCB circuit board 50 is ensured not to be damaged when being subjected to shaking or impact while being used as a component of the optical machine 100. In the present embodiment, the circuit board 50 is provided with the second through holes 51 corresponding to the first through holes 31. The second through holes 51 have the same function as the first through holes 31, and are used for avoiding the heat sink 70, so that the heat sink 70 can pass through the first through holes 31 and the second through holes 51, and the heat dissipation function of the spatial light modulator 20 is realized.

The pressure plate 60 abuts against the circuit board 50 to fix the position of the circuit board 50 within the housing 10. In the present embodiment, the pressing plate 60 may be connected with the housing 10 by bolts to achieve fixation between the pressing plate 60 and the housing 10. Specifically, in the present embodiment, the optical machine 100 further includes a first locking member 80, at least two first fixing holes are disposed at the edge of the pressing plate 60, and the locking member is disposed through the fixing holes and connected to the housing 10, so as to realize connection between the pressing plate 60 and the housing 10. In other embodiments, the platen 60 may also be part of the housing 10, not limited herein. The pressing plate 60 is further provided with a third through hole, and the third through hole is disposed corresponding to the first through hole 31 and the second through hole 51, so as to prevent the pressing plate 60 from blocking the radiator 70.

Since various circuit elements are provided on the circuit board 50, the direct abutment of the pressing plate 60 against the circuit board 50 may have a problem of damaging the circuit board 50. In some embodiments, the optical engine 100 further includes a pressing pad disposed between the pressing plate 60 and the circuit board 50, and disposed in a vertical direction to protect the circuit board 50 from being damaged by the pressing plate 60 under possible external impact or pressing. The pressure pad can be made of flexible materials, such as foam.

The heat sink 70 is mounted on the housing 10 and conducts heat to the spatial light modulator 20 through the first through hole 31 and the second through hole 51. In this embodiment, the heat spreader 70 has a heat conducting boss 71, and the heat conducting boss 71 extends toward the spatial light modulator 20. It can be appreciated that the heat conducting boss 71 may be made of a material with a high thermal conductivity, such as a metal material, so as to ensure the heat conducting efficiency of the heat dissipating boss. The cross-sectional shape of the heat conduction boss 71 is matched with the shapes of the first through hole 31 and the second through hole 51 so that the heat dissipation boss can pass through the first through hole 31 and the second through hole 51 and exchange heat with the spatial light modulator 20.

The heat dissipation surface 21 and the heat conduction boss 71 have a certain distance therebetween, so as to ensure that when the optical bench 100 is rocked or falls, the force received by the heat sink 70 is not directly transmitted to the spatial light modulator 20, and the spatial light modulator 20 is damaged. Too large a spacing between the heat dissipating surface 21 and the heat conducting boss 71 may result in inefficiency in the transfer of heat from the space optical exchanger to the heat dissipating boss. When the distance between the heat radiation boss and the heat radiation surface 21 is too small, the effect of protecting the spatial light modulator 20 by setting the distance may be reduced, so that in the present utility model, the distance between the heat radiation surface 21 and the heat conduction boss 71 is 0.2mm to 0.3mm, so that the spatial light modulator 20 can be protected and a certain heat radiation effect can be provided.

The provision of the gap necessarily results in a reduction in heat dissipation effect, so that as an embodiment, the heat sink 70 may be further provided with an elastic heat conductive pad disposed between the heat dissipation surface 21 and the heat conductive boss 71 to enhance heat exchange efficiency between the heat conductive boss 71 and the heat dissipation surface 21. The elastic heat conducting pad can be a heat conducting pad made of flexible materials, the materials can be silica gel or liquid metal, and the specific materials are not limited herein. In order to ensure that the elastic heat conducting pad can be fully abutted against the heat radiating surface 21 and the heat conducting boss 71, the thickness of the elastic heat conducting pad can be slightly larger than the gap between the heat conducting boss 71 and the heat radiating surface 21, so that the elastic heat conducting pad is continuously abutted against the heat radiating surface 21 and the heat conducting boss 71 under the action of restoring force after deformation. In the present embodiment, the thickness of the elastic heat conductive pad may be 0.4mm to 0.6mm to generate a sufficient deformation when being inserted into the space between the heat conductive boss 71 and the heat radiating surface 21.

The heat sink 70 may further include a heat radiating portion connected to the heat conductive boss 71 for heat exchange with the outside. As an embodiment, the heat radiating portion may be configured as a plurality of heat radiating fins to enhance the efficiency of heat exchange thereof. In other embodiments, the heat dissipation portion may be configured with a heat dissipation fan or a water cooling heat dissipation structure, and the specific structure of the heat dissipation portion is not limited herein.

In order to ensure the installation accuracy of the heat sink 70, in some embodiments, a second positioning post is further disposed on the heat sink 70, and a second positioning hole is further disposed on the pressing plate 60, where the second positioning post penetrates through the second positioning hole, so as to ensure the installation accuracy of the heat sink 70. The optical engine 100 may further include a second locking member 90, and a second fixing hole is further disposed on the heat sink 70, where the second locking member 90 is disposed through the second fixing hole and connected to the pressing plate 60, so as to fix the heat sink 70.

The optical engine 100 according to the embodiment of the present utility model is provided with the fixing member 30 and the annular gasket 40, and the fixing member 30 is mounted on the housing 10 and abuts against the heat dissipation surface 21 of the spatial light modulator 20, so as to ensure the mounting accuracy of the spatial light modulator 20. Meanwhile, the annular sealing gasket 40 comprises convex ribs and pressing points, and the convex ribs and the pressing points are abutted against the spatial light modulator 20, so that the installation precision of the spatial light modulator 20 is further improved, a certain damping effect is achieved, and the shock resistance of the optical machine 100 is improved.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting thereof; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and they should be included in the protection scope of the present utility model.

Claims (10)

1. A light engine, comprising:

a housing;

the spatial light modulator is arranged in the shell, and is provided with a radiating surface and a side surface, and the side surface is connected with the radiating surface and surrounds the radiating surface;

the fixing piece is arranged on the shell and is abutted against the radiating surface, and the fixing piece is provided with a first through hole;

the annular sealing gasket is provided with convex ribs and pressing points, the convex ribs are arranged around the spatial light modulator, the pressing points are abutted against the side face of the spatial light modulator, and at least two dispensing points are arranged between the convex ribs and the spatial light modulator;

the circuit board is arranged on one side, far away from the spatial light modulator, of the fixing piece, the spatial light modulator is electrically connected with the circuit board, and the circuit board is provided with a second through hole corresponding to the first through hole;

the pressing plate presses against the circuit board; and

and the radiator is arranged on the shell and conducts heat through the first through hole and the second through hole.

2. The machine of claim 1, wherein the at least two dispensing points are arranged angularly symmetrically.

3. The bare engine according to claim 1 wherein the heat sink has a thermally conductive boss embedded in the first and second through holes and adjacent to the heat dissipating surface.

4. A light engine as recited in claim 3, wherein said thermally conductive boss is spaced from said heat dissipating surface by a distance of 0.2-0.3mm.

5. The bare engine according to claim 3 wherein the heat sink further comprises an elastic thermal pad disposed between the heat dissipating surface and the thermal boss.

6. The bare engine according to claim 5 wherein the resilient thermal pad has a thickness of 0.4-0.6mm.

7. The bare engine of claim 1 further comprising a press pad disposed between the press plate and the circuit board.

8. The light engine of claim 1, wherein the housing is provided with at least one first positioning hole, the fixing member is provided with a first positioning post, and the first positioning post is inserted into the first positioning hole.

9. The light engine of claim 1, further comprising a first locking member, wherein the edge of the pressure plate is provided with at least two first fixing holes, and the locking member is disposed through the fixing holes and connected to the housing.

10. A projection system comprising a light engine as claimed in any one of claims 1-9.