Projection device

Abstract

The utility model discloses projection equipment, which comprises a shell, an optical machine, a heat conduction piece, a heat dissipation assembly and a display screen arranged on the outer surface of the shell, the heat dissipation assembly is arranged in the inner cavity of the shell and is close to the heat dissipation opening of the shell; the heat conduction piece is connected to the back face of the display screen and extends into the inner cavity of the shell to make contact with the heat dissipation assembly. According to the technical scheme of the projection equipment, effective heat insulation and heat dissipation of the display screen can be realized, and the display function of the display screen on the projection equipment is prevented from being reduced due to the influence of high-heat components such as a light machine in the shell.

Description

Technical Field

[0001] The utility model relates to the technical field of projection equipment, in particular to a projection equipment. Background Art

[0002] Under different temperature conditions, the brightness attenuation of the red, green and blue lights of the display screen is different. At room temperature and in a dry environment, the white balance of the display screen is normal, but in a high temperature environment, the attenuation values ​​of the brightness of each color are inconsistent with temperature changes, which will cause the brightness of the entire screen to decrease and color cast problems.

[0003] The core components inside the projection device include the optical engine. The light source part and the light valve part of the optical engine will generate a lot of heat when working. If a display screen is installed on the projection device at the same time, the heat generated by the optical engine may cause abnormal display function of the display screen. Utility Model Content

[0004] The main purpose of the utility model is to provide a projection device that can effectively insulate and dissipate heat for a display screen, so as to prevent the heat generated by an optical machine from causing abnormal function of the display screen.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] A projection device comprises: a shell, an optical machine, a heat-conducting member, a heat-dissipating assembly and a display screen arranged on the outer surface of the shell; the heat-dissipating assembly is arranged in the inner cavity of the shell and close to the heat-dissipating port of the shell; the heat-conducting member is connected to the back of the display screen and extends into the inner cavity of the shell to contact with the heat-dissipating assembly.

[0007] The projection device provided by the above technical solution of the utility model sets the display screen on the outer surface of the shell, and the display screen is separated from the inner cavity by the shell, so that the heat generated by the optical machine is limited to the inner cavity of the shell as much as possible, reducing the heat transfer from the optical machine to the display screen; at the same time, the display screen is connected to the heat dissipation component through the heat conductive member, so that the heat on the display screen can be effectively transferred and dissipated. In this way, the display screen can be effectively insulated and dissipated, and the display screen on the projection device is prevented from being affected by the high-heat components such as the optical machine in the shell and reducing the display function.

[0008] Further, the heat dissipation assembly includes heat dissipation fins and a fan, the air outlet of the heat dissipation fins faces the heat dissipation port of the housing, the heat conductive member is connected to the heat dissipation fins, and the fan and the heat dissipation port are located at two opposite sides of the heat dissipation fins. In this further technical solution, the fan faces the heat dissipation port, and the heat of the heat dissipation fins can be efficiently blown out from the heat dissipation port.

[0009] Furthermore, the heat conducting member includes a first heat conducting sheet and a heat conducting pipe; the first heat conducting sheet contacts the back of the display screen; the heat conducting pipe is connected to the first heat conducting sheet and extends into the inner cavity of the shell to connect with the heat dissipation fins. In this further technical solution, the heat of the display screen is conducted away by the first heat conducting sheet arranged on the back and conducted to the heat dissipation fins through the heat conducting pipe, thereby achieving efficient heat dissipation of the heat of the display screen.

[0010] Furthermore, a display screen groove is formed on the top surface of the shell, the display screen is accommodated in the display screen groove, and a heat conductive plate groove and a heat conductive pipe groove are formed at the bottom of the display screen groove, one section of the heat conductive plate groove is located in the heat conductive plate groove, and the other section extends to the inner cavity of the shell; the first heat conductive plate is accommodated in the heat conductive plate groove; the heat conductive pipe is accommodated in the heat conductive pipe groove.

[0011] Furthermore, the first heat conductive sheet is bonded to the back of the display screen by heat conductive adhesive.

[0012] Furthermore, the display screen is separated from the inner cavity by the shell, the shell is provided with a through hole connected to the inner cavity, and the heat-conducting pipe extends from the through hole into the inner cavity.

[0013] Further, the heat conducting member includes a second heat conducting sheet, a first heat conducting member, and a second heat conducting member; the top surface of the housing is provided with an opening connected to the inner cavity; the second heat conducting sheet is attached to the back of the display screen; one side of the first heat conducting member contacts the second heat conducting sheet, and the other side passes through the opening to contact the second heat conducting member in the inner cavity; the second heat conducting member contacts the heat dissipation component. In this further technical solution, the heat of the display screen is conducted away by the second heat conducting sheet arranged on the back and is successively conducted to the heat dissipation fins through the first heat conducting member and the second heat conducting member, thereby realizing efficient heat dissipation of the heat of the display screen.

[0014] Further, the second heat conductor includes a first connection portion and a second connection portion, the first connection portion contacts the heat sink fin, the second connection portion protrudes from the edge of the first connection portion and is integrally connected to the first connection portion, there is a gap between the second connection portion and the heat sink fin, and the second connection portion contacts the first heat conductor. In this further technical solution, when the first heat conductor contacts the second connection portion, the second connection portion can be partially deformed, thereby providing a height error allowance space for the first heat conductor, preventing the non-deformable contact between the first heat conductor and the second connection portion from causing damage to the component.

[0015] Furthermore, the first heat-conducting member is a refrigeration fin, a cold end of the refrigeration fin contacts the second heat-conducting fin, and a hot end of the refrigeration fin contacts the second heat-conducting member.

[0016] Furthermore, it also includes an optical machine heat pipe, one end of which is connected to the light source of the optical machine, and the other end is connected to the heat dissipation fin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the projection device of Example 1 of the utility model.

[0018] Figure 2 It is a schematic diagram of the top structure of the projection device housing of Example 1 of the utility model.

[0019] Figure 3 It is an exploded view of the top of the projection device housing of Example 1 of the utility model.

[0020] Figure 4 and Figure 5 It is a schematic diagram of the inner cavity of the projection device of Example 1 of the utility model.

[0021] Figure 6 It is a schematic diagram of the top structure of the projection device shell of Example 2 of the utility model.

[0022] Figure 7 It is a schematic diagram of the inner cavity of the projection device of Example 2 of the utility model.

[0023] Figure 8 It is an exploded view of the projection device structure of Example 2 of the present utility model.

[0024] Explanation of the reference numerals: 1-housing, 2-display screen, 3-glass top cover, 4-optical machine, 11-heat dissipation port, 12-top cover groove, 13, 13'-display screen groove, 14-heat conducting plate groove, 15-heat conducting pipe groove, 16-display circuit module groove, 51-heat dissipation fin, 52-fan, 61-first heat conducting plate, 62-heat conducting pipe, 63-optical machine heat conducting pipe; 71-first heat conducting member, 72-second heat conducting member, 73-second heat conducting plate, 721-first connecting portion, 722-second connecting portion. DETAILED DESCRIPTION

[0025] The present invention is further described below with reference to the accompanying drawings and in conjunction with specific embodiments. It should be understood that the purpose of providing embodiments is only for illustration, and not for any limitation. In addition, the spatial orientation words (such as "top", "bottom", etc.) used in the description of the technical solution of the present invention are convenient for describing the relative position relationship between the components of the product, and do not mean that the product has only the swing direction shown in the figure. In actual use, as the product swing direction is different, the spatial related description used to describe its swing direction should also be explained in a similar way. In addition, the terms "first", "second", etc. are only used to distinguish components. It should be understood that these components should not be limited by such terms. They themselves do not mean that these elements have the aforementioned ordinal numbers, nor do they represent the arrangement order of a certain component and another component or the order in the manufacturing method.

[0026] Example 1

[0027] Please refer to Figures 1 to 5 The projection device provided in Example 1 of the utility model includes: a housing 1, a display screen 2 arranged on the top of the outer surface of the housing 1, a glass top cover 3 arranged on the top of the housing 1, an optical engine 4 arranged in the inner cavity of the housing 1, a heat dissipation component and a heat conductive member. Among them, the heat dissipation component is arranged in the inner cavity of the housing 1 and close to the heat dissipation port 11 of the housing 1, and the heat dissipation component includes heat dissipation fins 51 and a fan 52. The air outlet of the heat dissipation fins 51 faces the heat dissipation port 11 of the housing. The heat conductive member is connected to the heat dissipation fins 11. The fan 52 and the heat dissipation port 11 are located on two opposite sides of the heat dissipation fins 51, and the air outlet of the fan faces the heat dissipation fins 51. In this way, the heat conducted from the display screen 2 to the heat dissipation fins 51 through the heat conductive member can be efficiently dissipated from the heat dissipation port 11 along with the air flow under the action of the fan. The heat conducting member includes a first heat conducting sheet 61 and a heat conducting pipe 62. The first heat conducting sheet 61 is bonded to the back of the display screen 2 by heat conducting adhesive. The heat conducting pipe 62 is connected to the bottom surface of the first heat conducting sheet 61 and extends into the inner cavity of the shell 1 to connect with the heat dissipation fins 51. The display screen 2 is separated from the inner cavity by the shell 1. The shell 1 is provided with a through hole connected to the inner cavity, and the heat conducting pipe 62 extends into the inner cavity from the through hole. In this way, a heat transfer path can be formed from the display screen 2 through the first heat conducting sheet 61 to the heat conducting pipe 62 and then to the heat dissipation fins 51, so that the heat generated by the display screen 2 when it is working or the heat transferred by the optical machine 4 can be transferred to the heat dissipation fins 51 along this path, and finally dissipated from the heat dissipation port 11, thereby achieving heat dissipation of the display screen 2 and effective heat insulation between the display screen 2 and the heat generating components in the inner cavity.

[0028] Continue to refer Figures 2 to 5In a preferred embodiment, the top surface of the housing 1 is provided with a top cover groove 12 for installing the glass top cover 3, and the bottom of the top cover groove 12 is formed with a display screen groove 13 for accommodating the display screen 2. The display screen 2 can be fixed in the display screen groove 13 by gluing, and the bottom of the display screen groove 13 is formed with a heat conductive plate groove 14 for accommodating the first heat conductive plate 61, a heat conductive pipe groove 15 for accommodating the heat conductive pipe 62, and a display circuit module groove 16 for accommodating the display circuit. The glass top cover 3 is installed in the top cover groove 12 and covers the top of the display screen 2. The area of ​​the glass top cover 3 is larger than the area of ​​the display screen 2. An opaque film can be applied on the glass top cover 3, and light is only formed in the position facing the display area of ​​the display screen 2; one section of the heat conductive pipe groove 15 is located in the heat conductive plate groove 14, and the other section extends to the inner cavity of the housing 1 through the through hole. The heat pipe 62 installed in the heat pipe groove 15 extends into the inner cavity of the housing through the through hole and is inserted into the mounting hole on the heat sink fin 51 to achieve thermal connection with the heat sink fin 51. A channel for passing the flexible circuit board FPC is provided in the display circuit module groove 16, so that the FPC of the display screen passes through the channel to reach the inner cavity of the housing 1 and is electrically connected to the circuit board in the inner cavity of the housing 1.

[0029] In this embodiment, the first heat conductive sheet 61 can be a copper sheet or a heat conductive sheet made of other materials, and the utility model is not limited to this; the heat conductive tube 62 can be a copper tube or a heat conductive tube made of other materials, and the utility model is not limited to this; in addition, in addition to being bonded to the back of the display screen 2 with thermal conductive glue, the first heat conductive sheet 61 can also be connected and fixed in other heat-conducting ways, and the utility model is not limited to this, as long as the first heat conductive sheet 61 is fixed to the back of the display screen in a heat-conducting contact manner, it is acceptable.

[0030] In addition, if Figure 4 and Figure 5 The figure shows a schematic diagram of the inner cavity of the projection device from the bottom perspective. The projection device of this embodiment may further include an optical heat pipe 63, one end of which is connected to the light source of the optical machine 4, and the other end is connected to the heat dissipation fin 51. In this way, the heat generated by the optical machine 4 can be conducted to the heat dissipation fin 51 through the optical heat pipe 63, and finally efficiently dissipated from the heat dissipation port 11 under the action of the fan 52, thereby achieving heat dissipation of the optical machine.

[0031] Example 2

[0032] Please refer to Figures 6 to 8The projection device provided in Example 2 of the utility model has a structural difference from the projection device in Example 1 mainly in the design of the heat-conducting member and the heat-dissipating assembly on the back of the display screen, so the similarities are not repeated. In this embodiment, the heat-conducting member includes a first heat-conducting member 71, a second heat-conducting member 72 and a second heat-conducting sheet 73; the second heat-conducting sheet 73 is bonded to the back of the display screen 2 by materials such as heat-conducting glue; a mounting port for connecting the outside of the shell with the inner cavity of the shell is provided at the bottom of the display screen groove 13', and the size of the mounting port is adapted to the area of ​​the first heat-conducting member 71, for example, slightly larger, and the first heat-conducting member 71 is installed in the mounting port; the second heat-conducting member 72 is installed in the inner cavity of the shell, one side of the first heat-conducting member 71 is in contact with the second heat-conducting sheet 73, and the other side opposite is in contact with the second heat-conducting member 72; the second heat-conducting member 72 is in contact with the heat-dissipating fins 51. In some specific embodiments, the first heat-conducting member 71 is a cooling plate. After the cooling plate is powered on, the heat at the cold end is moved to the hot end, resulting in a decrease in the temperature of the cold end and an increase in the temperature of the hot end. Therefore, the cold end of the cooling plate contacts the second heat-conducting plate 73, and the hot end contacts the second heat-conducting member 72. Considering the cost reasons, the cooling plate is small and cannot be attached to the back of the display screen in a large area. Therefore, in this embodiment, the cooling plate is connected to the display screen 2 through the second heat-conducting plate 73. The second heat-conducting plate 73 adopts a conventional heat-conducting metal plate such as a copper plate to contact the display screen 2 in a large area to achieve effective heat absorption. At the same time, the installation port is adapted to the area of ​​the cooling plate, so that while the cooling plate is passed through, the opening area can also be reduced to prevent the display screen slot 13' from being connected to the inner cavity of the housing 1 in a large area, which is conducive to isolating the heat in the inner cavity from being transferred to the display screen 2. The cooling plate is electrically connected to the circuit board in the inner cavity, so that the projection device can automatically control the heat conduction effect of the cooling plate through a program.

[0033] By using a cooling sheet and controlling the current of the cooling sheet to keep the hot end of the cooling sheet at a certain temperature, the temperature of the hot end can be made equal to or higher than that of the heat sink fins, preventing the heat from the heat sink fins from being transferred back to the display screen. This can effectively deal with the situation where the heat sink fins accumulate too much heat when the fan wind force is insufficient. In addition, the second heat conductive sheet 73 can also be made of a graphene sheet, which can be thinner and more efficient in heat conduction; the second heat conductive member 72 is a heat conductive structure such as a copper sheet. In this way, the heat of the display screen 2 can reach the heat sink fins 51 through the second heat conductive sheet 73, the first heat conductive member 71, and the second heat conductive member 72 in sequence, and finally be efficiently dissipated from the heat dissipation port 11 under the action of the fan.

[0034] refer to Figure 8In a more preferred embodiment, the second heat conducting member 72 includes a first connection portion 721 and a second connection portion 722, wherein the first connection portion 721 contacts the heat dissipation fin 51, and the second connection portion 722 protrudes from the edge of the first connection portion 721 and is integrally connected to the first connection portion 721; one side of the second connection portion 722 contacts the first heat conducting member 71, while the other side opposite to the heat dissipation fin 51 faces the heat dissipation fin 51 but there is a gap between the second connection portion 722 and the heat dissipation fin 51. In an exemplary implementation, the second connection portion 722 is located in the middle, and two first connection portions 721 are symmetrically formed on both sides of the second connection portion 722. In this way, when the first heat conducting member 71 contacts the second connection portion 722, the second connection portion 722 can be partially deformed, and the gap provides a deformation space, and at the same time, this deformation provides a height error allowance space for the first heat conducting member 71, thereby preventing the non-deformable contact between the first heat conducting member 71 and the second connection portion 722 from causing damage to the component.

[0035] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For technicians in the technical field to which the present invention belongs, several equivalent substitutions or obvious variations can be made without departing from the concept of the present invention, and the performance or use is the same, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. A projection device, characterized in that: include: A housing, an optical machine, a heat-conducting member, a heat-dissipating assembly, and a display screen disposed on the outer surface of the housing; the heat-dissipating assembly is disposed in the inner cavity of the housing and is close to the heat-dissipating opening of the housing; the heat-conducting member is connected to the back of the display screen and extends into the inner cavity of the housing to contact the heat-dissipating assembly; The heat dissipation assembly includes heat dissipation fins and a fan, the air outlet of the heat dissipation fins faces the heat dissipation port of the shell, the heat conduction member is connected to the heat dissipation fins, and the fan and the heat dissipation port are located on two opposite sides of the heat dissipation fins; The heat conducting member comprises a first heat conducting sheet and a heat conducting pipe; the first heat conducting sheet contacts the back of the display screen; the heat conducting pipe is connected to the first heat conducting sheet and extends into the inner cavity of the shell to be connected to the heat dissipation fins.

2. The projection device according to claim 1, characterized in that: The top surface of the housing is formed with a display screen groove, the display screen is accommodated in the display screen groove, the bottom of the display screen groove is formed with a heat conducting plate groove and a heat conducting pipe groove, one section of the heat conducting pipe groove is located in the heat conducting plate groove, and the other section extends to the inner cavity of the housing; the first heat conducting plate is accommodated in the heat conducting plate groove; The heat conducting pipe is accommodated in the heat conducting pipe groove.

3. The projection device according to claim 1, characterized in that: The first heat conductive sheet is bonded to the back of the display screen by heat conductive adhesive.

4. The projection device according to claim 1, characterized in that: The display screen is separated from the inner cavity by the shell, the shell is provided with a through hole communicating with the inner cavity, and the heat conducting pipe extends from the through hole into the inner cavity.

5. The projection device according to claim 1, characterized in that: The heat-conducting member includes a second heat-conducting sheet, a first heat-conducting member and a second heat-conducting member; an opening communicating with the inner cavity is formed on the top surface of the shell; the second heat-conducting sheet is attached to the back of the display screen; one side of the first heat-conducting member contacts the second heat-conducting sheet, and the other side passes through the opening to contact the second heat-conducting member in the inner cavity; the second heat-conducting member contacts the heat dissipation component.

6. The projection device according to claim 5, characterized in that: The second heat conducting member includes a first connecting portion and a second connecting portion, the first connecting portion contacts the heat dissipation fins, the second connecting portion protrudes from the edge of the first connecting portion and is integrally connected to the first connecting portion, there is a gap between the second connecting portion and the heat dissipation fins, and the second connecting portion contacts the first heat conducting member.

7. The projection device according to claim 5, characterized in that: The first heat-conducting member is a refrigeration fin, a cold end of the refrigeration fin contacts the second heat-conducting fin, and a hot end of the refrigeration fin contacts the second heat-conducting member.

8. The projection device according to claim 1, characterized in that: It also includes an optical machine heat pipe, one end of which is connected to the light source of the optical machine, and the other end is connected to the heat dissipation fin.

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