Projection device

Abstract

The utility model discloses a projection device. In the application, the heat conduction piece is attached to the back side of the LCD screen, so that the solid heat conduction piece is connected with the solid LCD screen in an attached manner, heat emitted by the LCD screen during working can be quickly transferred to the heat conduction piece, efficient cooling of the LCD screen is realized, the LCD screen is prevented from being in a continuous high-temperature state during working, the service life of the LCD screen is prolonged, and the service life of the LCD screen is prolonged. According to the heat conduction part, the attaching part is arranged, the extending part extending out of the attaching part is arranged, so that the area of the heat conduction part is larger than the area of the LCD screen, the surface area of the heat conduction part is increased, the heat conduction part can conduct absorbed heat to the outside more quickly, the heat dissipation effect on the LCD screen is further improved, and therefore the heat dissipation effect of the LCD screen is improved under the condition that heat dissipation is efficiently conducted on the LCD screen. The brightness of the LCD screen can be effectively increased so as to improve the projection effect.

Description

Technical Field

[0001] This application relates to the field of projection device technology, and more specifically, to a projection device. Background Technology

[0002] The projection imaging system of the projection device is in a relatively closed cavity. As the continuous working time of the projection device increases, a large amount of heat will accumulate inside the cavity. Therefore, a heat dissipation system is needed to quickly dissipate the heat inside the cavity in a timely manner so that the heat inside the cavity is maintained in an environment suitable for the operation of the projection imaging system.

[0003] In existing photographic equipment, fans are typically used to directly circulate air inside and outside the cavity to dissipate heat. However, effectively reducing the temperature inside the cavity requires increasing the number of fans or their output power to increase airflow speed. Both increasing the number of fans or their output power inevitably increase wind noise. Since wind noise and projection brightness are mutually restrictive, pursuing brightness inevitably increases heat generation, while pursuing heat dissipation inevitably limits brightness. Therefore, how to efficiently dissipate heat and control noise while ensuring brightness becomes a pressing problem to be solved. Utility Model Content

[0004] The main objective of this application is to provide a projection device to solve the problem of poor heat dissipation in existing projection devices.

[0005] This application provides a projection device, the projection device comprising:

[0006] A light source and an LCD screen, wherein the light source is spaced apart on the back side of the LCD screen;

[0007] A heat-conducting component, comprising a bonding portion and an extension portion, wherein the bonding portion is attached to the back side of the LCD screen and allows light emitted by the light source to pass through and be directed toward the LCD screen, and the extension portion extends outward along at least one side of the bonding portion.

[0008] Furthermore, the projection device also includes a heat sink, which is connected to the extension.

[0009] Furthermore, the extension includes a first sub-extension, and two first sub-extensions are respectively connected to opposite sides of the mating portion along a first direction;

[0010] And / or, a second sub-extension, the two second sub-extensions being respectively connected to opposite sides of the mating portion along a second direction;

[0011] Wherein, the first direction is perpendicular to the second direction, the plane containing the first direction and the second direction is the same plane as the plane containing the bonding portion, and at least the first sub-extension or the second sub-extension is provided with a plurality of the heat-conducting elements in an array.

[0012] Furthermore, the projection device includes an air duct and a first fan, the first fan driving airflow within the air duct to dissipate heat from the LCD screen;

[0013] The heat dissipation component is located inside the air duct.

[0014] Furthermore, the projection device includes a second fan, which is used to drive airflow on the surface of the heat sink.

[0015] Furthermore, the projection device also includes a transparent heat insulation component, which is disposed between the light source and the heat-conducting component, and is spaced apart from both the light source and the heat-conducting component.

[0016] Furthermore, the plurality of heat sinks extend toward the light source and pass over the heat insulation element.

[0017] Furthermore, the heat-conducting component is made of at least one highly thermally conductive transparent material selected from aluminum oxide and aluminum nitride;

[0018] Alternatively, the heat-conducting component may be made of transparent glass coated with a highly thermally conductive transparent film.

[0019] Furthermore, the light source includes a lamp panel and lamp beads, with the lamp beads disposed on one side of the lamp panel;

[0020] The projection device further includes a light source heat dissipation assembly, which includes a mounting plate, a heat-conducting rod, and heat sinks. The light source is disposed on the mounting plate, and the heat-conducting rod is connected between the mounting plate and the plurality of heat sinks. The heat-conducting rod is in at least partial contact with the side of the lamp plate away from the lamp beads.

[0021] In this application, by attaching the heat-conducting component to the back side of the LCD screen, the solid heat-conducting component is bonded to the solid LCD screen, allowing the heat generated by the LCD screen during operation to be quickly transferred to the heat-conducting component. This achieves efficient cooling of the LCD screen, preventing it from operating at a continuously high temperature and thus extending its lifespan. Furthermore, by providing an extension portion protruding from the bonding portion, the area of ​​the heat-conducting component is made larger than the area of ​​the LCD screen, increasing its surface area. This allows the heat-conducting component to conduct absorbed heat to the outside more quickly, further improving the heat dissipation effect on the LCD screen. Therefore, while efficiently dissipating heat from the LCD screen, the brightness of the LCD screen can be effectively increased, thereby improving the projection effect. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a three-dimensional schematic diagram of the projection device disclosed in this application.

[0024] Figure 2 This is a three-dimensional schematic diagram of the projection device disclosed in this application from another angle.

[0025] Figure 3 This is a schematic diagram showing the cooperation between the LCD screen, heat-conducting component, and heat-dissipating component in the projection device disclosed in this application.

[0026] Figure 4 This is a side view of the projection device disclosed in this application.

[0027] Figure 5 This is a schematic diagram of the cooperation between the light source and the heat dissipation component in the projection device disclosed in this application.

[0028] The above figures include the following reference numerals:

[0029] Projection device 100, light source 10, lamp board 11, lamp bead 12, LCD screen 20, heat conduction component 30, bonding part 31, extension part 32, heat dissipation component 40, heat insulation component 50, light source heat dissipation assembly 60, mounting plate 61, heat conduction rod 62, heat sink 63, reflector cup 70, first Fresnel lens 81, second Fresnel lens 82, lens module 90. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0033] Please see Figure 1-5 As shown, this application provides a projection device 100, which includes a light source 10, an LCD screen 20, and a heat-conducting component 30. The light source 10 is spaced apart on the back side of the LCD screen 20 and is used to emit strong white light onto the LCD screen 20. The heat-conducting component 30 includes a bonding portion 31 and an extension portion 32. The bonding portion 31 is bonded to the back side of the LCD screen 20 and allows light emitted by the light source 10 to pass through and be projected onto the LCD screen 20. The extension portion 32 extends outward along at least one side of the bonding portion 31.

[0034] By attaching the bonding portion 31 to the back side of the LCD screen 20, the solid heat-conducting component 30 is bonded to the solid LCD screen 20, allowing the heat generated by the LCD screen 20 during operation to be quickly transferred to the heat-conducting component 30. This achieves efficient cooling of the LCD screen 20, preventing it from operating at a continuously high temperature and thus extending its lifespan. Furthermore, by providing the extension portion 32 extending beyond the bonding portion 31, the area of ​​the heat-conducting component 30 is made larger than that of the LCD screen 20, increasing its surface area. This allows the heat-conducting component 30 to conduct absorbed heat to the outside more quickly, further improving the heat dissipation effect of the LCD screen 20. Therefore, by efficiently dissipating heat from the LCD screen 20, the brightness of the LCD screen 20 can be effectively increased, thus improving the projection effect.

[0035] Furthermore, the heat-conducting component 30 is made of at least one highly thermally conductive transparent material selected from aluminum oxide and aluminum nitride; or, the heat-conducting component 30 is made of transparent glass coated with a highly thermally conductive transparent film layer. This ensures that the heat-conducting component 30, while providing heat dissipation, does not interfere with the light emitted by the light source 10 reaching the LCD screen 20.

[0036] Further, please refer to Figure 1-4 As shown, the projection device 100 also includes a heat sink 40, and the heat conductor 30 is connected to the extension 32 to increase the heat dissipation area so that the heat absorbed by the heat conductor 30 can be dissipated more quickly.

[0037] Furthermore, in one embodiment, the extension 32 includes a first sub-extension 32, and two first sub-extensions 32 are respectively connected to opposite sides of the mating portion 31 along a first direction. Each first sub-extension 32 is provided with a plurality of the heat-conducting elements 30.

[0038] In another embodiment, the extension 32 includes a second sub-extension 32, and two second sub-extensions 32 are respectively connected to opposite sides of the fitting portion 31 along a second direction. Each second sub-extension 32 is provided with a plurality of the heat-conducting elements 30.

[0039] In other embodiments, the extension 32 includes two first sub-extensions 32 and two second sub-extensions 32. The two first sub-extensions 32 are disposed opposite to each other along the first direction and are respectively connected to one opposite side of the fitting portion 31; the two second sub-extensions 32 are disposed opposite to each other along the second direction and are respectively connected to the other opposite side of the fitting portion 31.

[0040] Wherein, the first direction and the second direction are perpendicular to each other, the plane containing the first direction and the second direction is the same plane as the plane containing the bonding portion 31, and at least the first sub-extension portion 32 or the second sub-extension portion 32 is provided with a plurality of heat-conducting elements 30 arranged in an array. This effectively increases the heat dissipation area so that the heat generated by the LCD screen 20 during operation can be dissipated quickly.

[0041] Furthermore, in one embodiment, the projection device 100 further includes an air duct and a first fan. The first fan is used to drive the airflow in the air duct to dissipate heat from the LCD screen 20. The heat sink 40 is disposed in the air duct so that the first fan can simultaneously drive the hot airflow on the surface of the heat sink 40, thereby further improving the heat dissipation efficiency of the LCD screen 20.

[0042] Furthermore, in another embodiment, the projection device 100 further includes a second fan, which only blows or draws air onto the heat sink 40, thereby driving airflow on the surface of the heat sink 40 and dissipating the heat absorbed by the heat sink 40, thereby dissipating the heat of the LCD screen 20.

[0043] Further, please refer to Figure 1 , 2 The projection device 100 shown in Figure 5 further includes a transparent heat insulation component 50. The heat insulation component 50 is disposed between the light source 10 and the heat-conducting component 30, and is spaced apart from both the light source 10 and the heat-conducting component 30. The heat insulation component 50 can be glass or other transparent materials with heat insulation properties, used to prevent heat emitted from the LCD screen 20 or the heat-conducting component 30 from being transferred to the light source 10, thereby avoiding increasing the burden on the LCD screen 20 for heat dissipation.

[0044] Furthermore, the plurality of heat sinks 40 extend toward the light source 10 and beyond the heat insulation member 50, or the plurality of heat sinks 40 extend toward the direction away from the light source 10, so that the heat sinks 40 have a large heat dissipation area.

[0045] Further, please refer to Figure 5As shown, the light source 10 includes a lamp board 11 and LED beads 12, with the LED beads 12 disposed on one side of the lamp board 11. The projection device 100 also includes a light source heat dissipation assembly 60, which includes a mounting plate 61, a heat-conducting rod 62, and heat sinks 63. The light source 10 is disposed on the mounting plate 61, and the heat-conducting rod 62 connects the mounting plate 61 and the plurality of heat sinks 63, with the heat-conducting rod 62 at least partially in contact with the side of the lamp board 11 away from the LED beads 12. This allows the heat generated by the LED beads 12 and the lamp board 11 during operation to be directly transferred to the mounting plate 61 or the heat-conducting rod 62, and then quickly transferred to the plurality of heat sinks 63 via the heat-conducting rod 62. The heat generated by the LED beads 12 and the lamp board 11 is then rapidly dissipated from a position away from the light source 10 by the plurality of heat sinks 63.

[0046] For further information, please refer to [link / reference]. Figure 1-4 As shown, the projection device 100 further includes a reflector 70, a first Fresnel lens 81, a second Fresnel lens 82, and a lens module 90. The reflector 70 covers the lamp plate 11 and is used to focus the light emitted by the lamp beads 12 to enhance brightness. The first Fresnel lens 81 is located at the open end of the reflector and is used to collimate the light emitted by the light source 10, so that the cone-shaped emitted light from the light source is projected onto the LCD screen 20 as directly as possible. The heat insulation member 50 is located between the first Fresnel lens 81 and the heat-conducting member 30, and is spaced apart from both. The second Fresnel lens 82 is located on the light-emitting surface of the LCD screen 20. The lens module 90 is located in the light path of the second Fresnel lens 82 away from the LCD screen 20. The light emitted from the LCD screen 20 is focused by the second Fresnel lens 82 and then directed towards the lens module 90, which projects it onto the projection area.

[0047] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0048] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0049] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A projection device, characterized in that, include: A light source and an LCD screen, wherein the light source is spaced apart on the back side of the LCD screen; A heat-conducting component, comprising a bonding portion and an extension portion, wherein the bonding portion is attached to the back side of the LCD screen and allows light emitted by the light source to pass through and be directed toward the LCD screen, and the extension portion extends outward along at least one side of the bonding portion.

2. The projection device according to claim 1, characterized in that, The projection device also includes a heat sink, which is connected to the extension.

3. The projection device according to claim 2, characterized in that, The extension includes a first sub-extension, and two first sub-extensions are respectively connected to opposite sides of the mating portion along a first direction; And / or, a second sub-extension, the two second sub-extensions being respectively connected to opposite sides of the mating portion along a second direction; Wherein, the first direction is perpendicular to the second direction, the plane containing the first direction and the second direction is the same plane as the plane containing the bonding portion, and at least the first sub-extension or the second sub-extension is provided with a plurality of the heat-conducting elements in an array.

4. The projection device according to claim 2, characterized in that, The projection device includes an air duct and a first fan, the first fan driving the airflow in the air duct to dissipate heat from the LCD screen; The heat dissipation component is located inside the air duct.

5. The projection device according to claim 2, characterized in that, The projection device includes a second fan, which is used to drive airflow on the surface of the heat sink.

6. The projection device according to claim 2, characterized in that, The projection device also includes a transparent heat insulation component, which is disposed between the light source and the heat-conducting component, and is spaced apart from both the light source and the heat-conducting component.

7. The projection device according to claim 6, characterized in that, The plurality of heat sinks extend toward the light source and pass over the heat insulation element.

8. The projection device according to claim 1, characterized in that, The heat-conducting component is made of at least one highly thermally conductive transparent material selected from aluminum oxide and aluminum nitride. Alternatively, the heat-conducting component may be made of transparent glass coated with a highly thermally conductive transparent film.

9. The projection device according to claim 1, characterized in that, The light source includes a lamp panel and lamp beads, with the lamp beads disposed on one side of the lamp panel; The projection device further includes a light source heat dissipation assembly, which includes a mounting plate, a heat-conducting rod, and heat sinks. The light source is disposed on the mounting plate, and the heat-conducting rod is connected between the mounting plate and the plurality of heat sinks. The heat-conducting rod is in at least partial contact with the side of the lamp plate away from the lamp beads.

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