CN217787584U

CN217787584U - Projection optical machine and projection equipment

Info

Publication number: CN217787584U
Application number: CN202221868236.3U
Authority: CN
Inventors: 王雨尧; 宋乐乐
Original assignee: Formovie Chongqing Innovative Technology Co Ltd
Current assignee: Formovie Chongqing Innovative Technology Co Ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2022-11-11
Anticipated expiration: 2032-07-20

Abstract

The utility model relates to a projection ray apparatus and projection equipment. The projection light machine comprises an optical component and a bracket. The optical component comprises a light source, a light cone, a first lens and a liquid crystal light valve, wherein the light cone, the first lens and the liquid crystal light valve are sequentially arranged along the transmission direction of emergent light of the light source. The support is equipped with accepts the chamber and with accepting the louvre of chamber intercommunication, the lateral wall of support is located to the louvre. The light cone is arranged in the containing cavity. In the process of projection, light emitted from the light source on the light cone is converted into heat in the light cone, which causes the temperature of the light cone to rise. Therefore, the projection light machine comprises a support with an accommodating cavity, the side wall of the support is provided with heat dissipation holes communicated with the accommodating cavity, the light cone is arranged in the accommodating cavity, cooling air flow can enter the accommodating cavity through the heat dissipation holes, the light cone is cooled, the air flow after heat exchange can flow out through the heat dissipation holes, the heat dissipation efficiency is improved, and damage to an optical device caused by overhigh temperature of the light cone is avoided.

Description

Projection optical machine and projection equipment

Technical Field

The utility model relates to a projection equipment technical field especially relates to a projection ray apparatus and projection equipment.

Background

The projection light machine consists of a light source, a light cone, a front Fresnel lens, a liquid crystal light valve, a rear Fresnel lens, a projection lens and the like. During projection, light rays emitted by the light source irradiate the liquid crystal light valve through the rear Fresnel lens, the emitted light rays are converged to the projection lens through the front Fresnel lens, and finally, the content displayed by the liquid crystal light valve is projected onto a screen.

In the process of projection, when light emitted by a light source is condensed on a light cone, part of the light is converted into heat, so that the temperature of the light cone rises, and the heat dissipation efficiency of the light cone in a common projection light machine is low.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a projection optical engine and a projection apparatus, which can improve the heat dissipation efficiency of the light cone.

A projection light engine, comprising:

the optical assembly comprises a light source, and a light cone, a first lens, a liquid crystal light valve and a second lens which are sequentially arranged along a transmission path of emergent light of the light source; and

the support, the support be equipped with accept the chamber and with accept the louvre of chamber intercommunication, the louvre is located the lateral wall of support, the light cone is located accept the intracavity.

In one embodiment, the bracket has a first light-entering end and a first light-exiting end, and the sectional area of the bracket gradually increases along the direction from the first light-entering end to the first light-exiting end; the light cone is provided with a second light inlet end and a second light outlet end, the sectional area of the light cone is gradually increased along the direction from the second light inlet end to the second light outlet end, the light source and the second light inlet end of the light cone are located at the first light inlet end of the support, and the first lens and the second light outlet end of the light cone are located at the first light outlet end of the support.

In one embodiment, the bracket has a first light-entering end and a first light-exiting end, the first light-exiting end is provided with a boss, the boss extends from the bracket to the outside of the accommodating cavity, and the inner side of the boss is provided with a step groove;

the first lens is arranged in the step groove; or, the optical assembly further comprises a heat insulation optical plate, the heat insulation optical plate is arranged in the step groove, and the first lens is arranged between the liquid crystal light valve and the heat insulation optical plate.

In one embodiment, the support has a first light-entering end and a first light-exiting end, a protruding rib is convexly disposed on a cavity wall of the accommodating cavity, the protruding rib extends from the first light-entering end toward the first light-exiting end, and an outer side wall of the light cone is in interference fit with the protruding rib.

In one embodiment, the projection optical machine further includes a casing, the casing includes a first accommodating chamber, the casing is provided with a mounting groove, the mounting groove penetrates through the casing along a first direction, a light through hole is formed in a bottom of the mounting groove, the first lens is disposed in the light through hole, the support and the light cone are both disposed in the mounting groove, and the liquid crystal light valve is disposed in the first accommodating chamber.

In one embodiment, the first accommodating chamber comprises an air cooling chamber, a first heat exchange chamber and a second heat exchange chamber, the first heat exchange chamber and the second heat exchange chamber are respectively located at two sides of the bracket in the second direction, the air cooling chamber is arranged between the first heat exchange chamber and the second heat exchange chamber and is respectively communicated with the first heat exchange chamber and the second heat exchange chamber, and the air cooling chamber, the first heat exchange chamber and the second heat exchange chamber are surrounded to form the mounting groove; wherein the second direction is perpendicular to the first direction.

In one embodiment, the liquid crystal light valve is arranged in the air-cooling chamber; the projection light machine further comprises a first fan and a heat exchanger, the heat exchanger comprises a heat dissipation part and a heat exchange part connected with the heat dissipation part, the heat exchange part is arranged in the first heat exchange cavity and/or the second heat exchange cavity, the heat dissipation part is arranged outside the casing, the first fan is arranged in the second heat exchange cavity, and the first fan is used for driving air in the first accommodating cavity to flow and flow through the liquid crystal light valve and the heat exchange part.

In one embodiment, the casing further comprises a second accommodating cavity, and the second accommodating cavity is arranged on one side of the air cooling cavity far away from the mounting groove; the optical assembly further comprises a projection lens and a reflector, the reflector and at least part of the projection lens are arranged in the second accommodating cavity, and the reflector is used for reflecting light rays emitted by the second lens to the projection lens.

A projection device comprises the projection light machine.

In one embodiment, the projection apparatus further includes a housing and a second fan, the projection optical engine and the second fan are disposed in the housing, the housing is provided with an air inlet and an air outlet, and the second fan is configured to drive a cooling airflow entering the housing through the air inlet to flow through the bracket and to be discharged from the air outlet.

According to the projection light machine and the projection equipment, during projection, light emitted by the light source is condensed by the light cone and then sequentially passes through the first lens, the liquid crystal light valve and the second lens, and finally, the content displayed by the liquid crystal light valve is projected onto a screen. In the process of projection, when light emitted by the light source is condensed on the light cone, part of the light is converted into heat, so that the temperature of the light cone is increased. Therefore, the projection light machine comprises a support with an accommodating cavity, the side wall of the support is provided with heat dissipation holes communicated with the accommodating cavity, the light cone is arranged in the accommodating cavity, cooling air flow can enter the accommodating cavity through the heat dissipation holes, the light cone is cooled, the air flow after heat exchange can flow out through the heat dissipation holes, the heat dissipation efficiency is improved, and damage to an optical device caused by overhigh temperature of the light cone is avoided.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

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

Fig. 1 is a schematic structural diagram of a projection apparatus according to an embodiment of the present invention;

FIG. 2 is an exploded view of the projection device shown in FIG. 1;

FIG. 3 is an exploded view of a light engine of the projection apparatus shown in FIG. 2;

fig. 4 is a first cross-sectional view of a projection optical engine according to an embodiment of the present invention;

fig. 5 is a second cross-sectional view of a projection optical engine according to an embodiment of the present invention;

fig. 6 is a third cross-sectional view of a projection optical engine according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a support of a projection light machine according to an embodiment of the present invention.

The reference numbers illustrate: 10. a housing; 11. a first accommodating chamber; 111. a first heat exchange chamber; 112. a second heat exchange chamber; 113. an air-cooled chamber; 12. a second accommodating chamber; 13. mounting grooves; 20. an optical component; 21. a light source; 22. a light cone; 23. a first lens; 24. a liquid crystal light valve; 25. a second lens; 26. an insulating optical plate; 27. a mirror; 28. a projection lens; 30. a support; 31. an accommodating cavity; 32. a side wall; 321. heat dissipation holes; 322. a first side wall; 323. a second side wall; 324. a third side wall; 325. a fourth side wall; 35. a boss; 351. a step groove; 37. a convex rib; 40. a first fan; 50. a heat exchanger; 51. a heat exchanging part; 52. a heat dissipating section; 60. a housing; 61. an air inlet hole; 62. an air outlet; 70. a heat sink; 71. a heat sink; 72. a heat conduction pipe; 73. a thermally conductive substrate; 80. and a second fan.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms different from those described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the specific embodiments disclosed below.

Referring to fig. 3 and 4, a projection optical machine according to an embodiment of the present invention includes an optical assembly 20 and a bracket 30. The optical assembly 20 includes a light source 21, and a light cone 22, a first lens 23, a liquid crystal light valve 24, and a second lens 25 sequentially arranged along a propagation direction of light emitted from the light source 21. The holder 30 is provided with a receiving cavity 31 and a heat dissipating hole 321 communicating with the receiving cavity 31, the heat dissipating hole 321 is provided on the sidewall 32 of the holder 30, and the light cone 22 is provided in the receiving cavity 31.

It should be noted that the number and the shape of the heat dissipation holes 321 can be set according to actual situations, for example, the heat dissipation holes 321 are square holes, circles, rectangles, long strips, and the like.

In the projection light machine, during projection, light emitted from the light source 21 is condensed by the light cone 22, and then passes through the first lens 23, the liquid crystal light valve 24 and the second lens 25 in sequence, and finally, the content displayed by the liquid crystal light valve 24 is projected onto the screen. In the process of projection, when the light emitted from the light source 21 is condensed on the light cone 22, a part of the light is converted into heat, which causes the temperature of the light cone 22 to rise. Therefore, the projection optical engine includes a bracket 30 having a receiving cavity 31, a heat dissipation hole 321 communicating with the receiving cavity 31 is disposed on a sidewall 32 of the bracket 30, and the light cone 22 is disposed in the receiving cavity 31, so that cooling air can enter the receiving cavity 31 through the heat dissipation hole 321 to cool the light cone 22, and the air after heat exchange can flow out through the heat dissipation hole 321, thereby improving the heat dissipation efficiency of the light cone 22 and preventing the optical device from being damaged due to the over-high temperature of the light cone 22.

Specifically, referring to fig. 3 and 7, the bracket 30 has a first light-in end and a first light-out end. The bracket 30 includes a sidewall 32, the sidewall 32 is disposed between the first light-entering end and the first light-exiting end, and encloses to form a receiving cavity 31, and the heat dissipation hole 321 is disposed on the sidewall 32. In this embodiment, the sidewall 32 includes a first sidewall 322, a second sidewall 323, a third sidewall 324 and a fourth sidewall 325, the first sidewall 322 and the third sidewall 324 are disposed opposite to each other, the second sidewall 323 and the fourth sidewall 325 are disposed opposite to each other, two sides of the first sidewall 322 are respectively connected to one side of the second sidewall 323 and one side of the fourth sidewall 325, and two sides of the third sidewall 324 are respectively connected to the other side of the second sidewall 323 and the other side of the fourth sidewall 325.

In one embodiment, referring to fig. 4 and 7, the support 30 has a first light input end and a first light output end. The first light-emitting end is provided with a boss 35, and the boss 35 extends from the bracket 30 to the outside of the accommodating cavity 31. In this way, the assembly of the bracket 30 and the casing 10 is achieved. In this embodiment, the first light-entering end and the first light-exiting end are disposed opposite to each other, and both the first light-entering end and the second light-entering end are open.

Alternatively, referring to fig. 4 and 5, a step groove 351 is provided on the inner side of the boss 35, and the first lens 23 is provided in the step groove 351. Thus, the first lens 23 can be prevented from slipping off the boss 35, and the reliability of mounting the first lens 23 can be improved. In addition, in this embodiment, the optical assembly 20 further includes a heat insulation plate 26, and the heat insulation plate 26 is disposed between the first lens 23 and the liquid crystal light valve 24, and can effectively block heat generated by the light source 21 from being conducted to the liquid crystal light valve 24.

Optionally, in other embodiments. Referring to fig. 6, a stepped groove 351 is formed inside the boss 35. The optical assembly 20 further includes a heat insulation optical plate 26, the heat insulation optical plate 26 is disposed in the step groove 351, and the first lens 23 is disposed between the liquid crystal light valve 24 and the heat insulation optical plate 26, i.e. the heat insulation optical plate 26 is disposed on a side of the first lens 23 away from the liquid crystal light valve 24. In the process of projection, the thermal insulation optical plate 26 can effectively block heat generated by the light source 21 from being conducted to the liquid crystal light valve 24, so as to avoid the influence of heat on each device in the optical assembly 20. Further, the insulating optical sheet 26 is provided with a polarizing film for causing light of a predetermined polarization state to be incident on the liquid crystal light valve 24, thereby forming a projection image. In the present embodiment, the insulating optical sheet 26 is insulating glass.

Referring to fig. 4, 5 and 6, if the temperature of the first lens 23 is too high, an air duct is formed between the first lens 23 and the thermal insulation optical plate 26. If the temperature of the first lens 23 is not high, two sides of the first lens 23 are respectively in corresponding sealing fit with two sides of the thermal insulation optical plate 26.

In one embodiment, referring to fig. 4 and 7, the cross-sectional area of the bracket 30 gradually increases along a direction from the first light-in end to the first light-out end, the light source 21 is disposed at the first light-in end, and the first lens 23 is disposed at the first light-out end. Optionally, the first sidewall 322 inclines from the first light-entering end to the first light-exiting end towards a direction away from the third sidewall 324, the second sidewall 323 inclines from the first light-entering end to the first light-exiting end towards a direction away from the fourth sidewall 325, the third sidewall 324 inclines from the first light-entering end to the first light-exiting end towards a direction away from the first sidewall 322, and the fourth sidewall 325 inclines from the first light-entering end to the first light-exiting end towards a direction away from the second sidewall 323. The light cone 22 has a second light-entering end and a second light-exiting end, the cross section of the light cone 22 is rectangular, and the cross section of the light cone 22 gradually increases along the direction from the second light-entering end to the second light-exiting end. The second light-entering end of the light cone 22 is located at the first light-entering end of the bracket 30, and the second light-exiting end of the light cone 22 is located at the first light-exiting end of the bracket 30. In this way, the light cone 22 is used for light condensation, which can improve the efficiency of the optical assembly 20, reduce light loss, increase brightness, and reduce cost. At the same time, the holder 30 is adapted to the shape and size of the light cone 22 to better accommodate the light cone 22.

In one embodiment, referring to fig. 7, the cavity wall of the receiving cavity 31 is protruded with a rib 37, and the rib 37 extends from the first light-entering end to the first light-exiting end. During installation, the outer side wall 32 of the light cone 22 is in interference fit with the convex ribs 37, so that the light cone 22 is stably and reliably installed in the accommodating cavity 31, a certain gap is formed between the outer side wall 32 of the light cone 22 and the wall of the accommodating cavity 31, and heat dissipation of the light cone is facilitated.

In one embodiment, referring to fig. 4, 5 and 6, the light engine further comprises a housing 10. The casing 10 includes first accommodation chamber 11, and the casing 10 is equipped with mounting groove 13, and mounting groove 13 runs through casing 10 along the first direction, and the tank bottom of mounting groove 13 is equipped with logical unthreaded hole, and logical unthreaded hole is located to first lens 23, and support 30 and light cone 22 are all located in mounting groove 13, and liquid crystal light valve 24 is located in first accommodation chamber 11. So, because the casing 10 is equipped with mounting groove 13, support 30 and light cone 22 all locate in mounting groove 13, the outside cooling air current of casing 10 that flows through like this can be through in mounting groove 13's notch gets into mounting groove 13, get into through the louvre 321 again and accept in the chamber 31, the air current after the heat transfer can be through the notch discharge of louvre 321 and mounting groove 13, with the purpose that reaches cooling light cone 22, improve light cone 22's radiating efficiency, avoid light cone 22's the high temperature to lead to the optical device to damage.

Further, referring to fig. 4, 5 and 6, the first accommodating chamber 11 includes an air-cooled chamber 113, a first heat exchange chamber 111 and a second heat exchange chamber 112, the first heat exchange chamber 111 and the second heat exchange chamber 112 are respectively located at two sides of the bracket 30 in the second direction, the air-cooled chamber 113 is disposed between the first heat exchange chamber 111 and the second heat exchange chamber 112 and is respectively communicated with the first heat exchange chamber 111 and the second heat exchange chamber 112, and the air-cooled chamber 113, the first heat exchange chamber 111 and the second heat exchange chamber 112 are surrounded to form the mounting groove 13. Wherein the second direction is perpendicular to the first direction. Thus, the mounting groove 13 can be formed by the above-mentioned structure.

Further, referring to fig. 4, 5 and 6, the liquid crystal light valve 24 is disposed in the air-cooled chamber 113. The projection light machine further includes a first fan 40 and a heat exchanger 50, the heat exchanger 50 includes a heat dissipation portion 52 and a heat exchange portion 51 connected to the heat dissipation portion 52, the heat exchange portion 51 is disposed in the first heat exchange chamber 111 and/or the second heat exchange chamber 112, the heat dissipation portion 52 is disposed outside the casing 10, the first fan 40 is disposed in the second heat exchange chamber 112, and the first fan 40 is configured to drive air in the first accommodating chamber 11 to flow and flow through the liquid crystal light valve 24 and the heat exchange portion 51. In the projection process, light emitted from the light source 21 is condensed by the light cone 22, and then passes through the first lens 23 and the liquid crystal light valve 24 in sequence, and finally, the content displayed by the liquid crystal light valve 24 is projected onto the screen. The light that cannot pass through the liquid crystal light valve 24 is converted into heat, and the first fan 40 operates to circulate the air in the first accommodating chamber 11, so that the cooling air flows through the liquid crystal light valve 24 to take away the heat of the liquid crystal light valve 24. Then, the cooling air flows through the heat exchanging portion 51, and the heat exchanging portion 51 absorbs heat of the cooling air and transfers the heat to the heat radiating portion 52 outside the cabinet 10 to cool down. The cooling airflow after heat exchange flows through the liquid crystal light valve 24 under the action of the first fan 40, and the circulation is performed, so that the liquid crystal light valve 24 in the first accommodating chamber 11 is cooled, the liquid crystal light valve 24 works at a proper temperature, the liquid crystal light valve 24 is prevented from being damaged due to the temperature, and the service life of the projection light machine is prolonged. Thus, the external arrangement of the light cone 22 is realized, and the light cone 22 does not participate in the circulation heat dissipation of the liquid crystal light valve 24.

Further, referring to fig. 4, 5 and 6, the casing 10 further includes a second accommodating chamber 12, which is disposed on a side of the air-cooling chamber 113 far from the installation groove 13. The optical assembly 20 further includes a projection lens 28 and a reflector 27, the reflector 27 and at least a portion of the projection lens 28 are disposed in the second accommodating chamber 12, and the reflector 27 is configured to reflect the light emitted from the second lens 25 to the projection lens 28. In this way, by disposing the reflecting mirror 27 in the second accommodating chamber 12, the reflecting mirror 27 can fold the optical path, and the size of the housing 10 is reduced, so that the projection optical system can be miniaturized. Of course, in other embodiments, the reflector 27 may not be disposed in the second accommodating chamber 12, and the light emitted from the light source 21 is converged by the light cone 22 and then directly irradiated to the projection lens 28 through the first lens 23, the liquid crystal light valve 24 and the second lens 25 in sequence, so that the light path is in a linear shape.

Referring to fig. 1, fig. 2, and fig. 3, a projection apparatus according to an embodiment of the present invention includes the projection light engine according to any of the embodiments.

In the projection apparatus, during projection, light emitted from the light source 21 is condensed by the light cone 22, and then passes through the first lens 23, the liquid crystal light valve 24 and the second lens 25 in sequence, and finally, the content displayed by the liquid crystal light valve 24 is projected onto the screen. During the projection process, when the light emitted from the light source 21 is focused on the light cone 22, part of the light is converted into heat, which causes the temperature of the light cone 22 to increase. Therefore, the projection optical engine includes a bracket 30 having a receiving cavity 31, a heat dissipation hole 321 communicating with the receiving cavity 31 is disposed on a sidewall 32 of the bracket 30, and the light cone 22 is disposed in the receiving cavity 31, so that cooling air can enter the receiving cavity 31 through the heat dissipation hole 321 to cool the light cone 22, and the air after heat exchange can flow out through the heat dissipation hole 321, thereby improving the heat dissipation efficiency of the light cone 22 and preventing the optical device from being damaged due to the over-high temperature of the light cone 22.

In one embodiment, referring to fig. 1, 2, and 3, the projection device further includes a second blower 80 and a housing 60. The housing 60 is provided with an air inlet 61 and an air outlet 62, and the air inlet 61 and the air outlet 62 are respectively arranged on two opposite side walls of the housing 60. The second fan 80 is used for driving the cooling air flow entering the housing 60 through the air inlet holes 61 to flow through the support frame 30 and to be discharged from the air outlet holes 62. In the projection process, the second fan 80 drives the cooling air flow entering the housing 60 through the air inlet 61 to flow through the bracket 30, and the cooling air flow enters the open chamber through the opening and then enters the accommodating chamber 31 through the heat dissipation hole 321, so as to cool the light cone 22 and improve the heat dissipation efficiency. In addition, the air flow after heat exchange can be exhausted from the air outlet 62 through the heat dissipation hole 321 and the opening to take away the heat inside the projector.

In one embodiment, referring to fig. 1, 2, and 3, the projection device further includes a heat sink 70, the heat sink 70 being in thermally conductive communication with the light source 21. In the projection process, the light source 21 generates heat and transmits the heat to the heat sink 70, and the cooling air flow entering the housing 60 through the air inlet 61 takes away the heat of the heat sink 70, so as to reduce the temperature of the light source 21 and achieve the heat dissipation of the light source 21.

Optionally, referring to fig. 1, fig. 2 and fig. 3, the heat dissipation device 70 further includes a heat sink 71, a heat pipe 72 and a heat conductive substrate 73. The heat conducting substrate 73 is in heat conducting connection with the light source 21, the heat sink 71 and the second fan 80 are disposed in a space surrounded by the projection lens 28, the chassis 10 and the casing 60, the second fan 80 is located between the chassis 10 and the heat sink 71, one end of the heat conducting pipe 72 is in heat conducting connection with the heat conducting substrate 73, and the other end is in heat conducting connection with the heat sink 71. The second fan 80 is also used for driving the cooling air flow entering the housing 60 through the air inlet holes 61 to flow through the radiator 71 and to be discharged from the air outlet holes 62. During projection, the light source 21 generates heat, which is conducted to the heat conduction pipe 72 through the heat conduction substrate 73, and then transferred to the heat sink 71 through the heat conduction pipe 72. The second fan 80 rotates to generate negative pressure, so that air enters the housing 60 through the air inlet holes 61, and the air forms cooling air flow under the action of the second fan 80. The second fan 80 blows cooling air flow toward the heat sink 71, and the cooling air flow takes away heat on the heat sink 71, thereby achieving heat dissipation of the light source 21. In addition, the second fan 80 and the heat sink 71 are disposed in a space defined by the enclosure 10, the projection lens 28 and the housing 60, so that the internal space of the housing 60 can be fully utilized, the space utilization rate can be improved, and the volume of the projection apparatus can be reduced.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" 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 defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A projection light engine, comprising:

2. The light projector of claim 1 wherein the bracket has a first light input end and a first light output end, and the cross-sectional area of the bracket gradually increases along the direction from the first light input end to the first light output end;

the light cone is provided with a second light inlet end and a second light outlet end, the sectional area of the light cone is gradually increased along the direction from the second light inlet end to the second light outlet end, the light source and the second light inlet end of the light cone are positioned at the first light inlet end of the support, and the first lens and the second light outlet end of the light cone are positioned at the first light outlet end of the support.

3. The projector according to claim 1, wherein the holder has a first light input end and a first light output end, the first light output end has a boss, the boss extends from the holder to the receiving cavity, and a step groove is formed on an inner side of the boss;

4. The optical projection engine according to claim 1, wherein the bracket has a first light-entering end and a first light-exiting end, a protruding rib is protruded from a wall of the accommodating cavity, the protruding rib extends from the first light-entering end to the first light-exiting end, and an outer sidewall of the light cone is in interference fit with the protruding rib.

5. The projection engine according to claim 1, further comprising a housing, wherein the housing comprises a first receiving chamber, the housing has a mounting groove, the mounting groove penetrates the housing along a first direction, a light hole is disposed at a bottom of the mounting groove, the first lens is disposed at the light hole, the support and the light cone are disposed in the mounting groove, and the liquid crystal light valve is disposed in the first receiving chamber.

6. The projection engine of claim 5, wherein the first accommodating chamber comprises an air-cooled chamber, a first heat exchange chamber and a second heat exchange chamber, the first heat exchange chamber and the second heat exchange chamber are respectively located at two sides of the bracket in the second direction, the air-cooled chamber is arranged between the first heat exchange chamber and the second heat exchange chamber and is respectively communicated with the first heat exchange chamber and the second heat exchange chamber, and the air-cooled chamber, the first heat exchange chamber and the second heat exchange chamber are enclosed to form the mounting groove; wherein the second direction is perpendicular to the first direction.

7. The light engine of claim 6, wherein the liquid crystal light valve is disposed within the air-cooled chamber;

the projection light machine further comprises a first fan and a heat exchanger, the heat exchanger comprises a heat dissipation part and a heat exchange part connected with the heat dissipation part, the heat exchange part is arranged in the first heat exchange cavity and/or the second heat exchange cavity, the heat dissipation part is arranged outside the casing, the first fan is arranged in the second heat exchange cavity, and the first fan is used for driving air in the first accommodating cavity to flow and flow through the liquid crystal light valve and the heat exchange part.

8. The projector according to claim 6, wherein the housing further comprises a second receiving chamber, the second receiving chamber is disposed on a side of the air-cooled chamber away from the mounting groove;

the optical assembly further comprises a projection lens and a reflecting mirror, the reflecting mirror and at least part of the projection lens are arranged in the second accommodating cavity, and the reflecting mirror is used for reflecting light rays emitted by the second lens to the projection lens.

9. A projection apparatus comprising the light engine of any of claims 1 to 8.

10. The projection device of claim 9, further comprising a housing and a second fan, wherein the projection light machine and the second fan are disposed in the housing, the housing is provided with an air inlet and an air outlet, and the second fan is configured to drive a cooling air flow entering the housing through the air inlet to flow through the bracket and to be discharged from the air outlet.