WO2019148700A1

WO2019148700A1 - Thermal out-of-focus preventing projection apparatus

Info

Publication number: WO2019148700A1
Application number: PCT/CN2018/088377
Authority: WO
Inventors: 刘海涛; 亓森林; 谢颂婷; 李屹
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2018-02-05
Filing date: 2018-05-25
Publication date: 2019-08-08
Also published as: CN110119012A; CN110119012B

Abstract

A thermal out-of-focus preventing projection apparatus (1), comprising a lens barrel (10) and a temperature adjusting assembly (20). The temperature adjusting assembly (20) and the lens barrel (10) form a heat exchange relationship to maintain the temperature of the lens barrel (10) at a preset temperature, thereby mitigating the out-of-focus situation of the lens barrel of a light engine caused by the deformation produced by thermal expansion and contraction of the lens barrel (10) of the light engine under the effect of the temperature, improving the projection clearness of the projection apparatus (1), and reducing material costs without focusing during use, and the projection apparatus is convenient to use.

Description

\¥0 2019/148700 卩(:17(:\2018/088377

Heat-proof defocus projection device

[0001] The present invention relates to the field of projection display, and in particular to a thermal defocus projection device.

Background technique

[0002] At present, an important defect in the thermal projection and defocus projection device such as an intelligent projector is that the temperature in the body rises sharply after a period of operation, and the thermal expansion and contraction causes a slight shift in the position of the lens and the lens barrel. The picture is thus blurred. The existing technology mainly solves the problem of defocusing of the lens barrel of the projector from two aspects. One is to change the plastic lens and the lens barrel into a glass lens and a metal lens barrel, but this will greatly increase the cost; the other method is through auto focus. .technical problem

[0003] However, the use of autofocus still has the step of focusing during the viewing process, which causes inconvenience to the user.

Summary of invention

technical problem

Problem solution

Technical solution

In view of the above circumstances, the present invention provides a heat-resistant defocus projection apparatus to solve the above problems.

[0005] A heat-resistant defocus projection apparatus includes a lens barrel and a temperature adjustment component, and the temperature adjustment component is in heat exchange relationship with the lens barrel for maintaining the temperature of the lens barrel at a preset temperature.

In one embodiment, the preset temperature is a stable operating temperature.

[0007] In an embodiment, the temperature adjustment component includes a controller, a temperature sensor, and a temperature rising component, the temperature sensor is disposed outside the lens barrel, and is coupled to the controller signal, and the temperature rising component is coupled to the controller signal, and the controller is configured to The temperature rising element is activated before the heat prevention and defocus projection device performs projection, and the temperature rising element is turned off when the temperature of the barrel sensed by the temperature sensor reaches a stable operating temperature.

In one embodiment, the thermal de-focus projection apparatus further includes a lens, the lens is received in the lens barrel, and the temperature sensor is disposed on an outer surface of the lens barrel corresponding to the intersection of the lens and the lens barrel.

In one embodiment, the temperature rising element includes a plurality of semiconductor cooling devices including opposite cold ends and hot ends, the hot ends being bonded to the outer surface of the lens barrel. \¥0 2019/148700 卩(:17(:\2018/088377

[0010] In one embodiment, the preset temperature is room temperature.

[0011] In an embodiment, the temperature adjustment component includes a controller, a heat dissipating component, and a temperature sensor, the temperature sensor is located on an outer surface of the lens barrel, and is coupled to the controller signal, the heat dissipating component and the controller are connected to the signal, and the controller is used for Turn on the heat sink and turn off the heat sink when the temperature of the barrel sensed by the temperature sensor reaches room temperature.

[0012] In one embodiment, the heat dissipating component includes a plurality of semiconductor refrigerating components, and the semiconductor refrigerating device includes a cold end and a hot end disposed opposite each other, and the cold end is attached to the outer surface of the lens barrel.

[0013] In one embodiment, the temperature adjustment assembly includes heat dissipation fins disposed on an outer surface of the lens barrel.

[0014] In one embodiment, the temperature adjustment assembly further includes a thermally conductive layer disposed between the heat dissipation fins and the lens barrel.

[0015] In an embodiment, the thermal defocus projection device includes a housing having a projection end and a tail end, the light exit surface of the lens barrel is located at the projection end, and the housing has a relative arrangement and is located between the projection end and the tail end. a first sidewall, a second sidewall, and a bottom wall connecting the first sidewall and the second sidewall, the first sidewall has a first tuyere; the temperature adjustment assembly further includes a first fan and a duct forming member, the first The fan is disposed in the first tuyere, the air duct forming member is located on the bottom wall, and corresponds to the lens barrel, and the air duct forming member surrounds the air duct, and the first fan is configured to introduce the cold airflow for heat dissipation from the outside of the outer casing.

[0016] In an embodiment, the second sidewall has a second tuyere, and the temperature adjustment member further includes a second fan, and the second fan is disposed in the second tuyere.

[0017] In one embodiment, the first tuyere and the second tuyere are both disposed adjacent to the trailing end, and the air duct extends from the projection end to the trailing end.

[0018] In an embodiment, the air duct forming member includes a first side edge, a second side edge, and a third side edge disposed opposite to each other, and the first side edge and the second side edge are disposed perpendicular to the bottom wall, The three sides are connected to the first side and the second side and are away from the first fan.

[0019] In one embodiment, the temperature regulating assembly further includes a plurality of bottom tuyères, the plurality of bottom tuyères being located on the bottom wall and located within the enclosed region of the duct forming member.

[0020]

Advantageous effects of the invention \¥0 2019/148700 卩(:17(:\2018/088377)

[0021] Compared with the prior art, the thermal defocus projection device provided by the present invention greatly improves the out-of-focus condition of the optical lens barrel caused by the deformation caused by the thermal expansion and contraction of the optical lens barrel, and further The projection resolution of the projection device is improved; at the same time, the thermal defocus projection device provided by the invention also reduces the material cost compared to the prior art technology for changing the material of the projection device and the material of the lens barrel; There is no thermal out of focus during the entire use and viewing process, so there is no need to adjust the focus during use and it is convenient to use.

[0022] These and other aspects of the invention will be more apparent from the following description of the embodiments.

Brief description of the drawing

DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a schematic structural view of a lens barrel of a heat-proof and defocus projection device according to a first embodiment of the present invention.

2 is a schematic structural view of a lens barrel of a thermal de-focusing projection device according to a second embodiment of the present invention.

3 is a schematic side view of a lens barrel of a thermal de-focus projection apparatus according to a third embodiment of the present invention.

4 is a schematic side view of a lens barrel of a heat-proof and defocus projection apparatus according to another embodiment of the third embodiment of the present invention.

5 is a schematic structural view of a heat-proof and defocus projection apparatus provided by still another embodiment of the third embodiment of the present invention.

[0029]

Invention embodiment

Embodiments of the invention

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other implementations obtained by those skilled in the art without creative efforts based on the embodiments of the present invention \¥0 2019/148700 卩(:17(:\2018/088377), all of which fall within the scope of protection of the present invention.

First embodiment

Referring to FIG. 1 , a thermal defocus projection apparatus 1 according to a first embodiment of the present invention includes a lens barrel 10 and a temperature adjustment component 20 , and the temperature adjustment component 20 forms a heat exchange relationship with the lens barrel 10 for using a mirror. The temperature of the barrel is maintained at a preset temperature, which may be a point value, such as 50 degrees Celsius, or a range, such as 40 degrees Celsius to 60 degrees Celsius.

[0033] In this embodiment, the preset temperature is specifically a stable working temperature of the anti-thermal defocus projection device 1. For example, the internal temperature of the product can be preset to a stable working temperature after half an hour of starting the product, and the stable operation is performed. The temperature ranges from 40 degrees Celsius to 60 degrees Celsius. The stable operating temperatures of different products are different. At the same time, the stable working temperature can also be considered as the highest working temperature.

[0034] The temperature adjustment assembly 20 includes a controller 21, a temperature sensor 22, and a temperature rising element 23. The temperature sensor 22 is disposed outside the lens barrel 10 and is signally connected to the controller 21, and the temperature rising element 23 is signally connected to the controller 21, and the controller 21 is configured to activate the temperature rising element 23 before the heat prevention and defocus projection apparatus performs projection, and The temperature rising element 23 is turned off when the barrel temperature sensed by the temperature sensor 22 reaches a stable operating temperature.

[0035] The lens barrel 10 has a cylindrical shape, and the two ends are respectively a light-emitting surface 101 and a light-incident surface 102. The light-emitting surface 101 is used for projection, and the light-incident surface 102 is used for light. In the present embodiment, at the end close to the light exiting surface 101, the outer diameter of the lens barrel 10 is larger than the outer diameter of the end close to the light incident surface 102. In other embodiments, the outer diameter of the lens barrel 10 can be equal everywhere.

The temperature sensor 22 is disposed outside the lens barrel 10, for example, on the outer surface 100 of the lens barrel 10, and is signal-connected to the controller 21, either by wire connection or by wireless connection. The temperature rising element 23 and the controller 21 are signal-connected, and may be connected by wire or wirelessly. The controller 21 turns the temperature rising element 23 on and off in accordance with the barrel temperature in conjunction with the operating state of the projection apparatus 1. Specifically, before the projection device 1 turns on the projection function, the temperature rising element 23 is turned on for preheating, and the temperature rising element 23 generates heat, so that the temperature of the lens barrel 10 rises continuously and rises to a stable operating temperature, and then the controller 21 turns on the projection function. And the temperature rising element 23 is turned off, so that when the projection device 1 starts to work, it is at a stable working temperature, that is, the highest working temperature, and the lens barrel 10 and the lens (not shown) housed in the lens barrel 10 are at a stable operating temperature. The corresponding deformation and small displacement have occurred. When the projection function is turned on, the system automatically adjusts the focus of the current lens barrel 10 and the lens or by the user's hand. Dynamic focus, because the current stable temperature has been reached, the temperature will not change any more. At this time, the effect after focusing can adapt to the current working temperature of the projection device 1, and the change is basically no longer, so that the image is continuously clear and unnecessary. The purpose of multiple focusing.

[0037] Further, the lens 105 is housed in the lens barrel 10, the lens barrel 10 has an inner surface, the intersection of the lens and the inner surface is the position A, and the position A corresponds to the position B of the outer surface 100 of the lens barrel 10, the temperature sensor 22 is set at position B, and the temperature of the lens barrel 10 can be measured more accurately.

[0038] The temperature rising element 23 may be various heat generating electric heating elements. In the present embodiment, the temperature rising element 23 includes a plurality of semiconductor refrigeration devices (Thermo Electric Cooler, TEC chip, which is made using the J-Peltier effect of the semiconductor material. The so-called Peltier effect refers to when a direct current passes through two When a galvanic material consists of a semiconductor material, one end absorbs heat and one end radiates heat. When a current flows from the TEC, the heat generated by the current will pass from one side of the TEC to the other side, generating "heat" on the TEC. "Side and "cold" sides), for example, include four TEC chips 231. Each of the semiconductor refrigeration devices 231 includes a rear cold end 2311 and a hot end 2312, wherein the hot end 2312 and the outer surface 100 of the lens barrel 10 are attached to each other to continuously heat the outer surface 100 of the lens barrel 10. The four TEC chips 231 can be disposed at equal intervals in the circumferential direction of the lens barrel 10. In other embodiments, the number of TEC chips 231 may be other numbers, such as 1, 2, 3, 5, 6, etc. In the present embodiment, the temperature rising element 23 is disposed adjacent to the side of the lens exit surface 101.

[0039] In summary, the thermal defocus projection apparatus 1 provided in this embodiment raises the temperature of the lens barrel 10 to a stable working temperature by setting the temperature rising element 23 on the lens barrel 10, causing the lens barrel and the lens to occur in advance. Small deformation or displacement, on the basis of the first automatic focusing or manual focusing, since the optical machine will always work at a stable working temperature, no thermal defocus will occur, which improves the projection resolution of the projection device; Compared with the prior art technology for changing the material of the projection device and the material of the lens barrel, the present invention provides a heat-proof and defocus projection device which also reduces the material cost; since the projection device provided by the present invention does not lose heat during the whole use and viewing process The focus phenomenon, so there is no need to adjust the focus during use, and it is convenient to use.

[0040]

Second Embodiment

Referring to FIG. 2, a thermal defocus projection apparatus 2 according to a second embodiment of the present invention includes a lens barrel 10 (which is substantially the same as the lens barrel 10 of the first embodiment) and a temperature adjustment assembly 30, and a temperature adjustment assembly 30. Forming a heat exchange relationship with the lens barrel 10 for maintaining the temperature of the lens barrel at a preset temperature, which may be a point \¥0 2019/148700 卩(:17(:\2018/088377 value, for example 50 degrees Celsius, can also be a range, such as 40 degrees Celsius ~ 60 degrees Celsius.

In the embodiment, the preset temperature is specifically the room temperature of the environment in which the thermal afocal projection device 2 is located.

[0044] The temperature adjustment component 30 includes a controller 31, a heat dissipating component 32, and a temperature sensor 33. The temperature sensor 33 is located on the outer surface 100 of the lens barrel 10, and is signally connected to the controller 31. The heat dissipating component 32 and the controller 31 are signally connected. The controller 31 is used to turn on the heat dissipating member 32 and turn off the heat dissipating member 32 when the temperature of the lens barrel sensed by the temperature sensor 33 reaches room temperature.

The temperature sensor 33 is disposed outside the lens barrel 10, for example, on the outer surface 100 of the lens barrel 10, and is signally connected to the controller 31, either by wire connection or wirelessly. The heat dissipating component 32 and the controller 31 are signal-connected, either by wired connection or by wireless connection. The controller 31 turns on and off the heat dissipating member 32 in accordance with the barrel temperature in conjunction with the room temperature at which the projection device 2 is placed.

[0046] Specifically, the controller 31 can obtain the room temperature by the room temperature value which is previously solidified in the controller, and the room temperature value can be a point value or a range value. The room temperature is selected from the standard value in the general sense to be solidified in the controller 31, for example, the fixed room temperature is 25 degrees Celsius, or 23° 0±2° (:, 25〇0±5〇0, 20°〇±5° ( The controller 31 can also know the real-time room temperature by using a room temperature sensor (not shown) disposed on the outer casing of the projection device 2 (refer to the casing 50 in FIG. 5), that is, the projection device 2 further includes a room temperature sensor. A signal is coupled to the controller 31 to transmit real time room temperature to the controller 31.

The controller 31 can turn off the heat dissipating member 32 when the barrel temperature and the room temperature are equal to each other or fall within the range of the room temperature, and turn on the heat dissipating member 32 when the barrel temperature exceeds the room temperature again due to work heat.

[0048] In the present embodiment, the heat dissipating component 32 is an electrically dissipating component. For example, a semiconductor refrigeration device

sheet). Heat sink

3211 and hot end 3212, wherein the cold end 3211 and the outer surface 100 of the lens barrel 10 are attached to each other to achieve the purpose of continuously dissipating heat to the outer surface 100 of the lens barrel 10. Four (the chips 321 can be arranged at equal intervals in the circumferential direction of the lens barrel 10. In other embodiments, the number of the chips 321 can be other numbers, for example, one, two, three In the present embodiment, the heat dissipating member 32 is disposed on the side close to the light-emitting surface 101 of the lens barrel, or may be disposed at any other position on the outer surface 100 of the lens barrel 10.

[0049] Since the heat dissipating member 32 can continuously dissipate heat under the control of the controller 31, the temperature of the lens barrel is maintained at room temperature, so that problems such as thermal defocusing and running out of focus do not occur, so that it is not necessary to focus multiple times during operation. \¥0 2019/148700 卩(:17(:\2018/088377

[0050] In summary, the heat-proof and defocus projection device 2 provided by the embodiment improves the projection resolution of the projection device by effectively dissipating heat, and the projection of the projection device is improved. The technology of the lens barrel material, the heat-proof and defocus projection device 2 provided by the embodiment further reduces the material cost; since the projection device provided by the embodiment does not exhibit thermal defocusing during the whole use and viewing process, it is not required to be used. Focusing during the process, easy to use.

[0051]

Third Embodiment

Referring to FIG. 3, the heat-proof out-of-focus projection provided by the third embodiment of the present invention includes a lens barrel 10 (which is substantially the same as the lens barrel 10 in the first embodiment) and a temperature adjustment unit 40.

[0054] The temperature adjustment component 40 includes heat dissipation fins 41 located in the circumferential direction of the lens barrel 10 and extending perpendicularly to the outer surface 100 of the lens barrel 10, and the lens barrel 10 is increased by the dense sheet-like structure thereof. The surface area is dissipated, thereby effectively reducing the temperature of the lens barrel 10. Since the higher the temperature at the junction of the lens barrel 10 and the inner lens is, the more obvious the focus phenomenon is, the number and/or length of the heat dissipation fins 41 can be increased at the corresponding outer surface position of the lens to further lower the temperature of the lens barrel 10.

[0055] Further, referring to FIG. 4, in another embodiment, the temperature adjustment component 40 further includes a heat conductive layer 400 disposed between the heat dissipation fins 41 and the lens barrel 10, specifically, The heat dissipation fin 41 is between the outer surface 100 of the lens barrel 10. The heat conductive layer 400 may specifically be a thin layer formed by coating a thermal conductive paste and a thermal grease on the outer surface 100 of the lens barrel. In other embodiments, a thermally conductive colloid may also be applied within the gap of the fins 41.

[0056] Further, please refer to FIG. 3 (or FIG. 4) and FIG. 5. In still another embodiment, the thermal afocal projection device 3 further includes a housing 50 having projection ends 501 and tails facing away from each other. The end surface 502, the light emitting surface 101 of the lens barrel 10 is located at the projection end 501, and the outer casing 50 has a first side wall 51, a second side wall 52, and a first side wall which are oppositely disposed between the projection end 501 and the tail end 502. 51 and a bottom wall 53 of the second side wall 52, the first side wall 51 has a first tuyere 511, and the second side wall 52 has a second tuyeres 521; the temperature adjustment assembly 40 further includes a first fan 42, a second fan 43 And the air duct forming member 44, wherein the first fan 42 is disposed in the first tuyere 511, the second fan 43 is disposed in the second tuyere 521, and the air duct forming member 44 is located at the bottom wall 53, and corresponds to the lens barrel 10, The air duct forming member 44 surrounds the air duct 440, and the air duct 440 extends from the projection end 501 toward the tail end 502. The first tuyere 511 and the second tuyere 521 may be opposite or may be separately arranged \¥0 2019/148700 卩(:17(:\2018/088377) at one end, middle or the other end of the first side wall 51 and the second side wall 52.

In other embodiments, the first tuyere 511 and the second tuyere 512 may alternatively be disposed, and the first fan 42 and the second fan 43 may alternatively be disposed. That is, a fan can be used to form a negative pressure inside the heat-loss-loss projection apparatus 3, and a heat-dissipating airflow is introduced from the outside to dissipate heat.

[0058] The inside of the casing 50 houses a circuit of the heat-resistant defocus projection device 3 and an optical path structure. The outer casing 50 has a substantially rectangular parallelepiped structure, and the thickness direction is thinner than the longitudinal direction and the width direction. The projection end 501 faces the projection screen, and the tail end 502 is connected to the signal line. The first side wall 51 and the second side wall 52 are located opposite each other between the projection end 501 and the trailing end 502. The first side wall 51 and the second side wall 52 connected to the bottom wall 53 are located on the lower side of the lens barrel 10, and the lens barrel 10 corresponds to a vertical projection area of the bottom wall 53 (a peripheral area to which a vertical projection area can be added) There is a duct forming member 44. To facilitate heat dissipation, the air duct forming member 44 is a metal member, such as an aluminum member, an aluminum alloy member, or the like, and the enclosed air duct 440 is used to conduct heat in the direction of the lens barrel 10 to other directions for heat exchange, such as wind. The track 440 is aligned with the first tuyere 511 or the second tuyeres 512, or the air duct 440 specifically includes two air ducts, respectively aligned with the first tuyere 511 and the second tuyere 512.

[0059] In the embodiment, the first tuyere 511 and the second tuyere 521 are oppositely disposed to quickly conduct heat, and the first tuyeres 511 and the second tuyeres 521 are both close to the tail end 502, and the air duct 440 is a self-projecting end 501. A channel that extends toward the trailing end 502.

More specifically, the air duct forming member 44 includes a first side 441 and a second side 442 that are opposite and spaced apart, and the first side 441 and the second side 442 are disposed perpendicular to the bottom wall 53 so that A duct 440 is formed below the lens barrel 10

The air passage forming member 44 further includes a third side 443 connected to the first side 441 and the second side 442 and located at one end away from the first fan 42 and the second fan 43. In this embodiment, the third side 433 is adjacent to the projection end 501, away from the trailing end 502, to better output heat to the trailing end 502, and then the lateral convection passage formed by the first fan 42 and the second fan 43 will Heat output. The rotational speeds of the first fan 42 and the second fan 43 are adjustable to accommodate different cooling requirements, so that the barrel temperature reaches a preset temperature. The preset temperature can be a preset room temperature.

Further, the temperature adjustment assembly 40 further includes a plurality of bottom tuyères 45 located at the bottom wall 53 and located within the enclosed area of the air duct formation member 44. The number and aperture of the bottom tuyere 45 may depend on the area of the enclosed area. \¥0 2019/148700 卩(:17(:\2018/088377

[0063] The thermal defocus projection device 3 provided in this embodiment is provided with a tuyere and a fan on the first side wall 51 and the second side wall 52, and the air outlet and the fan are disposed at the tail end 502 to facilitate internal heat dissipation; When the air passage 440 and the lateral convection passage formed by the first fan 42 and the second fan 43 are substantially perpendicular, the heat dissipation efficiency is further improved.

[0064] In the whole heat dissipation process, similar to the second embodiment of the present invention, a temperature sensor is disposed in the lens barrel to detect the real-time temperature of the lens barrel, and further compared with a preset room temperature or real-time room temperature, when it cannot be reached. When the ideal preset temperature or the room temperature cannot be reached, the rotational speeds of the first fan 42 and the second fan 43 are adjusted to reach the preset temperature.

[0065] In summary, the anti-thermal defocus projection device 3 provided by the embodiment improves the projection resolution of the projection device by effectively dissipating heat, and the projection resolution of the projection device is improved. The technology of the lens barrel material, the heat-proof and defocus projection device 3 provided by the embodiment further reduces the material cost; since the projection device provided by the embodiment does not have thermal defocus phenomenon during the whole use and viewing process, it is not required to be used. Focusing during the process, easy to use.

The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is not to be construed as limiting the scope of the invention. It should be noted that various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the invention should be subject to the appended claims.

[0067]

Claims

\¥0 2019/148700 卩(:17(:\2018/088377 Claims)

[Claim 1] A heat-resistant defocus projection apparatus, comprising: a lens barrel and a temperature adjustment component, wherein the temperature adjustment component forms a heat exchange relationship with the lens barrel for using the lens barrel The temperature is maintained at the preset temperature.

[Claim 2] 2. The thermal de-focus projection apparatus according to claim 1, wherein the preset temperature is a stable operating temperature.

[Claim 3] The thermal defocus projection apparatus according to claim 2, wherein the temperature adjustment component includes a controller, a temperature sensor, and a temperature rising element, and the temperature sensor is disposed in the lens barrel Externally connected to the controller, the temperature increasing element is coupled to the controller signal, the controller is configured to activate the temperature increasing element before the thermal afocal projection device performs projection, and The temperature rising element is turned off when the temperature of the barrel sensed by the temperature sensor reaches the stable operating temperature.

[Claim 4] The thermal defocus projection apparatus according to claim 3, wherein the thermal defocus projection apparatus further includes a lens, the lens is received in the lens barrel, the temperature The sensor is disposed at an outer surface of the lens barrel corresponding to the intersection of the lens and the lens barrel.

[Claim 5] The thermal defocus projection apparatus according to claim 3 or 4, wherein the temperature increasing element comprises a plurality of semiconductor cooling devices, and the semiconductor cooling device comprises opposite cold The end and the hot end, the hot end being attached to the outer surface of the lens barrel.

[Claim 6] The heat-resistant defocus projection apparatus according to claim 1, wherein the preset temperature is room temperature.

[Claim 7] The thermal defocus projection apparatus according to claim 6, wherein the temperature adjustment component comprises a controller, a heat dissipating component, and a temperature sensor, wherein the temperature sensor is located at \¥0 2019/148700 卩(:17(:\2018/088377) The outer surface of the lens barrel is connected to the controller signal, the heat dissipating component is connected to the controller signal, and the controller is used to open The heat dissipating component, and the heat dissipating component is turned off when the temperature of the lens barrel sensed by the temperature sensor reaches the room temperature.

[Claim 8] The thermal defocus projection apparatus according to claim 7, wherein the heat dissipating component comprises a plurality of semiconductor refrigerating components, and the semiconductor cooling device comprises a cold end disposed opposite to each other And a hot end, the cold end is in contact with an outer surface of the lens barrel.

[Claim 9] The thermal defocus projection apparatus according to claim 6, wherein the temperature adjustment assembly comprises a heat dissipation fin, and the heat dissipation fin is disposed on an outer surface of the lens barrel.

[Claim 10] The thermal defocus projection apparatus according to claim 9, wherein the temperature adjustment component further comprises a heat conduction layer, the heat conduction layer is disposed on the heat dissipation fin and the mirror Between the tubes.

[Claim 11] The thermal de-focus projection apparatus according to claim 9, wherein the thermal defocus projection apparatus comprises a casing, the casing has a projection end and a tail end, and the lens barrel a light emitting surface is located at the projection end, the outer casing has a first side wall, a second side wall, and a first side wall and the first side wall disposed between the projection end and the tail end First

a first fan and a duct forming member, the first fan is disposed in the first tuyere, the air duct forming member is located on the bottom wall, and corresponds to the lens barrel, the air duct forming member a first air duct for introducing a cold airflow for heat dissipation from the outside of the outer casing

[Claim 12] The thermal de-focus projection apparatus according to claim 11, wherein the second side wall has a second tuyere, and the temperature adjusting member further includes a second fan, the Two fans are disposed in the second tuyere. \¥0 2019/148700 卩(:17(:\2018/088377

[Claim 13] The thermal defocus projection apparatus according to claim 12, wherein the first tuyere and the second tuyere are both disposed adjacent to the tail end, and the air duct is oppositely disposed. Extending from the projection end toward the trailing end.

[Claim 14] The thermal defocus projection apparatus according to claim 11, wherein the air passage forming member includes a first side, a second side, and a third side which are disposed at relatively spaced intervals The first side edge and the second side edge are disposed perpendicular to the bottom wall, the third side edge is coupled to the first side edge and the second side edge, and is away from the first side fan.

[Claim 15] The thermal defocus projection apparatus according to claim 11, wherein the temperature adjustment component further comprises a plurality of bottom tuyères, wherein the plurality of bottom tuyères are located on the bottom wall, and Located in the enclosed area of the air duct forming member.