Laser projection device

Abstract

The embodiment of the application discloses a kind of laser projection equipment, belong to projection technical field.The laser projection equipment includes: optical engine, projection screen, connecting frame and functional component;Optical engine and projection screen are connected with connecting frame, optical engine can be rotated relative to connecting frame, to make the included angle between the light exit side of optical engine and projection screen between the first reference angle and the second reference angle switching, to realize the folding or lowering of optical engine;At least one of projection screen and connecting frame is used to be fixedly connected with support;Optical engine is electrically connected with functional component.In the embodiment of the application, connecting frame connects optical engine and projection screen into a whole, so that optical engine is not prone to displacement.In addition, since the functional component is independently arranged from the optical engine, the overall size of the optical engine is reduced, and the miniaturization design of the laser projection equipment is further realized.

Description

Technical Field

[0001] This application relates to the field of projection technology, and in particular to a laser projection device. Background Technology

[0002] With the continuous development of technology, laser projection equipment is increasingly being used in people's work and daily lives. Currently, laser projection equipment mainly consists of an optical engine and a projection screen. The optical engine's light output port faces the projection screen to emit a light beam, which the projection screen then receives and displays the image.

[0003] In related technologies, such as Figure 1 As shown, the projection screen 1 is fixed on the support 2, and the optical engine 3 is fixed on the support cabinet 4. However, the optical engine 3 fixed on the support cabinet 4 is prone to displacement, and it is difficult to adjust the optical engine 3 back to its initial projection position after displacement. Summary of the Invention

[0004] This application provides a laser projection device that solves the problem of optical engine displacement in laser projection devices. The technical solution is as follows:

[0005] A laser projection device, the laser projection device comprising: an optical engine, a projection screen, a connecting frame, and functional components;

[0006] Both the optical engine and the projection screen are connected to the connecting frame. The optical engine can rotate relative to the connecting frame so that the angle between the light-emitting side of the optical engine and the projection screen switches between a first reference angle and a second reference angle, so as to realize the lowering or retraction of the optical engine. At least one of the projection screen and the connecting frame is used to be fixedly connected to the support.

[0007] The optical engine is electrically connected to the functional components and is able to emit a light beam in cooperation with the functional components;

[0008] The projection screen is used to reflect the light beam emitted by the optical engine to display images.

[0009] Optionally, the connecting frame has a planar structure;

[0010] The connecting frame includes multiple straight connecting rods and a first connecting shaft;

[0011] The first ends of the plurality of linear connecting rods are fixedly connected to the first connecting shaft, the second ends of the plurality of linear connecting rods are fixedly connected to the projection screen, the optical engine is rotatably connected to the first connecting shaft, and the plurality of linear connecting rods are all telescopic rods.

[0012] Optionally, the connecting frame may further include a plurality of support rods;

[0013] Multiple support rods are fixed to the back of the projection screen, and one end of each support rod is fixedly connected to the second end of the straight connecting rod.

[0014] Optionally, the connecting frame has an L-shaped cross-section;

[0015] The connecting frame includes multiple L-shaped connecting rods and a second connecting shaft;

[0016] The first end of each of the L-shaped connecting rods is fixedly connected to the second connecting shaft, the second end of each of the L-shaped connecting rods is fixedly connected to the projection screen, the optical engine is rotatably connected to the second connecting shaft, and the support rods on each of the L-shaped connecting rods that are parallel to the projection screen are all telescopic rods.

[0017] Optionally, the connecting frame further includes a bracket extending in a direction perpendicular to the projection screen, the bracket being used to support the optical engine when the optical engine is lowered.

[0018] Optionally, the laser projection device further includes a first housing;

[0019] The first housing is rotatably connected to the connecting frame. The shell wall of the first housing has a first light-transmitting area. The optical engine is located inside the first housing. When the optical engine is lowered, the light beam emitted by the optical engine can pass through the first light-transmitting area and be emitted to the projection screen.

[0020] Optionally, the laser projection device further includes a second housing and a third housing;

[0021] The second housing and the third housing are located on opposite sides of the first housing, and both the second housing and the third housing are connected to the connecting frame;

[0022] The functional component includes a first sub-functional component and a second sub-functional component, wherein the first sub-functional component is located within the second housing and the second sub-functional component is located within the third housing.

[0023] Optionally, the second housing, the first housing, and the third housing form a T-shaped structure.

[0024] Optionally, the functional component includes a control motherboard located within the first housing and electrically connected to the optical engine.

[0025] Optionally, the functional component includes a speaker located within the first housing, and the speaker is electrically connected to the control motherboard.

[0026] Optionally, the functional component includes a power board located inside the first housing, and the power board is electrically connected to the control motherboard.

[0027] The beneficial effects of the technical solutions provided in this application embodiment can include at least:

[0028] The connector allows the optical engine and projection screen to be integrated into a single unit. Therefore, the optical engine is less prone to displacement compared to the projection screen, ensuring that the beam emitted by the optical engine is projected onto the correct position on the screen, guaranteeing excellent projection results. Since the optical engine can switch between retracted and extended states, its projection function is maintained while reducing the overall size of the laser projection device when the optical engine is not in use. Furthermore, because the functional components are set up independently of the optical engine, the overall size of the optical engine is reduced, further enabling the miniaturization of the laser projection device. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a structural schematic diagram of a laser projection device provided by related technologies;

[0031] Figure 2 This is a schematic diagram of the structure of a laser projection device provided in an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of another laser projection device provided in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the structure of an optical engine provided in an embodiment of this application;

[0034] Figure 5 This is a schematic diagram of another optical engine provided in an embodiment of this application;

[0035] Figure 6 This is a partial structural diagram of a projection screen provided in an embodiment of this application;

[0036] Figure 7 This is a schematic diagram of a hook and fixing screw provided in an embodiment of this application;

[0037] Figure 8This is a schematic diagram of the structure of another laser projection device provided in the embodiments of this application;

[0038] Figure 9 This is a schematic diagram of the structure of another laser projection device provided in the embodiments of this application;

[0039] Figure 10 This is a schematic diagram of the structure of another laser projection device provided in the embodiments of this application;

[0040] Figure 11 This is a schematic diagram of the structure of another laser projection device provided in the embodiments of this application.

[0041] Figure label:

[0042] Related technologies:

[0043] 1: Projection screen; 2: Support body; 3: Optical engine; 4: Support cabinet.

[0044] Example of this application:

[0045] 1: Optical engine; 2: Projection screen; 3: Connector; 4: Functional components; 5: First housing; 6: Second housing; 7: Third housing; 8: Water-cooled radiator; 9: Air-cooled radiator;

[0046] 11: Laser light source; 12: Light modulation component; 13: Projection lens; 14: Heat sink; 15: Light source heat dissipation component; 16: Light valve heat dissipation component; 21: Hook; 22: Hole; 23: Fixing screw; 31: Straight connecting rod; 32: First connecting shaft; 33: Support rod; 34: L-shaped connecting rod; 35: Second connecting shaft; 36: Support platform; 41: First sub-functional component; 42: Second sub-functional component; 43: Control motherboard; 44: Speaker; 45: Power board; 46: Display board; 51: First light-transmitting area;

[0047] 111: Light source housing; 112: Light source driver board; 121: Optical engine housing; 122: Optical valve driver board. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0049] Figure 2 A schematic diagram illustrating the structure of a laser projection device according to an embodiment of this application is provided. Figure 2As shown, the laser projection device includes: an optical engine 1, a projection screen 2, a connecting frame 3, and a functional component 4; both the optical engine 1 and the projection screen 2 are connected to the connecting frame 3, and the optical engine 1 can rotate relative to the connecting frame 3 so that the angle between the light-emitting side of the optical engine 1 and the projection screen 2 switches between a first reference angle and a second reference angle, so as to realize the retraction or extension of the optical engine 1; at least one of the projection screen 2 and the connecting frame 3 is used for fixed connection with a support; the optical engine 1 is electrically connected to the functional component 4 and can emit a light beam with the cooperation of the functional component 4; the projection screen 2 is used to reflect the light beam emitted by the optical engine 1 to display an image.

[0050] In this embodiment, the connecting frame 3 connects the optical engine 1 and the projection screen 2 into a single unit. Therefore, the optical engine 1 is less prone to displacement relative to the projection screen 2, ensuring that the beam emitted by the optical engine 1 is projected onto the correct position on the projection screen 2, thus guaranteeing a good projection effect. Since the optical engine 1 can switch between retracted and extended states, its projection function is maintained while reducing the overall size of the laser projection device when the optical engine 1 is not in use. Furthermore, because the functional component 4 is set independently of the optical engine 1, the overall size of the optical engine 1 is reduced, further achieving a miniaturized design for the laser projection device.

[0051] In this embodiment, the rotation of the optical engine 1 can be achieved manually. Of course, in other embodiments, the rotation of the optical engine 1 can also be achieved through a control mechanism. Compared with manual control, the control mechanism has higher control precision, and the control mechanism can control the optical engine 1 to stop at any position, thereby avoiding the setting of a limiting mechanism and reducing the complexity of the structure.

[0052] Optionally, the optical engine 1 is located directly below or above the projection screen 2. In other embodiments, the optical engine 1 is located to the left or right of the projection screen 2. Of course, the relative position between the optical engine 1 and the projection screen 2 can also be set in other forms, as long as the light beam emitted by the optical engine 1 can be projected onto the projection screen 2 when in use.

[0053] Optionally, when the optical engine 1 is rotated manually, a limiting groove is provided at the connection point between the optical engine 1 and the connecting bracket 3. This limiting groove restricts the extreme positions of the optical engine 1's rotation, achieving positioning after the optical engine 1 rotates to a first reference angle or a second reference angle. Alternatively, the connecting bracket 3 includes a support extending in a direction perpendicular to the projection screen 2, which supports the optical engine 1 when it is lowered. This allows the support to limit the rotation angle of the optical engine 1, thereby ensuring the accuracy of its rotation.

[0054] Optionally, the bracket has a U-shaped structure, with both ends of the U-shaped bracket fixedly connected to the connecting frame 3. In this way, when the optical engine 1 is manually rotated to a first reference angle between the plane of the light-emitting side and the plane of the projection screen 2, the U-shaped bracket extends away from the plane of the connecting frame 3, thereby enabling the U-shaped bracket to support the optical engine 1 more stably.

[0055] Optionally, the connection between the connecting frame 3 and the projection screen 2, as well as the connection between the connecting frame 3 and the optical engine 1, are detachable. For example, the connecting frame 3 and the projection screen 2, and the connecting frame 3 and the optical engine 1, are connected by screws or pins. This way, if the projection screen 2 malfunctions, it can be disassembled and sent for repair separately; if the optical engine 1 malfunctions, it can be disassembled and sent for repair separately, thus avoiding the inconvenience of sending the entire laser projection equipment for repair.

[0056] Optionally, such as Figure 2 As shown, the first reference angle is 90°, which means that the surface of the light-emitting side of the optical engine 1 is perpendicular to the surface of the projection screen 2, as shown. Figure 3 As shown, the second reference angle is 0°, which means that the surface of the light-emitting side of the optical engine 1 is parallel to the surface of the projection screen 2.

[0057] Typically, the optical engine 1 is rectangular in shape. When the optical engine 1 is lowered for use, that is, when the angle between the light-emitting side of the optical engine 1 and the plane of the projection screen 2 is the first reference angle of 90°, the dimension of the optical engine 1 along the direction perpendicular to the plane of the projection screen 2 is greater than the dimension of the optical engine 1 along the vertical direction. When the optical engine 1 is retracted to end use, that is, when the optical engine 1 is rotated to the position where the angle between the light-emitting side of the optical engine 1 and the plane of the projection screen 2 is the second reference angle of 0°, the dimension of the optical engine 1 along the direction perpendicular to the plane of the projection screen 2 is significantly reduced, thereby reducing the thickness of the entire laser projection device and realizing the miniaturization design of the laser projection device when the optical engine 1 is not in use.

[0058] The following section explains the components included in a laser projection device.

[0059] Optionally, in this embodiment, the laser projection device is an ultra-short-throw laser projection device, and correspondingly, the optical engine 1 is an ultra-short-throw optical engine. For example, the ultra-short-throw optical engine is a DLP (Digital Light Processing) optical engine. This allows for a shorter distance between the optical engine 1 and the projection screen 2, thereby achieving a miniaturized design of the laser projection device.

[0060] In some embodiments, such asFigure 4 As shown, the optical engine 1 (not shown) includes a laser light source 11, a light modulation component 12, and a projection lens 13. The laser light source 11 is connected to the light modulation component 12, and the projection lens 13 is connected to the light modulation component 12. The laser light source 11, the light modulation component 12, and the projection lens 13 are all electrically connected to some components included in the functional component 4, and projection is completed in cooperation with the functional component 4. When the optical engine 1 is an ultra-short-throw optical engine, the projection lens 13 is an ultra-short-throw projection lens.

[0061] Optionally, such as Figure 4 As shown, the laser source 11 includes a source housing 111, a laser, and a source driving board 112. The laser is located inside the source housing 111 and is used to emit a beam to the light modulation component 12. The source driving board 112 is located outside the source housing 111. The laser is electrically connected to the source driving board 112, and the source driving board 112 is electrically connected to the functional component 4.

[0062] Optionally, such as Figure 4 As shown, the optical modulation assembly 12 includes an optical engine housing 121, an illumination system, an optical valve, and an optical valve drive board 122. The illumination system and the optical valve are located inside the optical engine housing 121, while the optical valve drive board 122 is located outside the optical engine housing 121 and is electrically connected to the optical valve. The optical valve drive board 122 is also electrically connected to the functional component 4.

[0063] The light valve is a DMD (Digital Micromirror Device), and the light valve driver board 122 is a DMD board. The illumination system adjusts the beam emitted from the laser source 11 to meet the light input requirements of the DMD. The DMD board provides a drive signal to the DMD so that the beam deflected and reflected by the DMD can be displayed on the projection screen 2 after passing through the projection lens 13.

[0064] In addition, such as Figure 4 and Figure 5 As shown, the optical engine 1 also includes a heat sink 14, a light source heat dissipation assembly 15, and a light valve heat dissipation assembly 16. Optionally, both the light source heat dissipation assembly 15 and the light valve heat dissipation assembly 16 include a fan, a liquid cooling device, etc.

[0065] In some embodiments, such as Figure 2 As shown, the laser projection device also includes a first housing 5; the first housing 5 is rotatably connected to the connecting frame 3, and the shell wall of the first housing 5 has a first light-transmitting area 51. The optical engine 1 is located inside the first housing 5. When the optical engine 1 is lowered, the light beam emitted by the optical engine 1 can pass through the first light-transmitting area 51 and be emitted to the projection screen 2. In this way, the first housing 5 can support the optical engine 1, and after the first housing 5 is rotatably connected to the connecting frame 3, it can drive the optical engine 1 to rotate together, while avoiding damage to the optical engine 1.

[0066] Optionally, the first housing 5 is a cuboid-shaped housing or a housing of other shapes.

[0067] The first housing 5 has a limiting structure for placing the optical engine 1, thereby limiting the optical engine 1. The first light-transmitting area 51 is a circular light-transmitting hole on the first housing 5, or a combination of a light-transmitting hole and a light-transmitting lens, as long as it can ensure that the light beam emitted by the optical engine 1 can pass through the first light-transmitting area 51 and be emitted to the projection screen 2.

[0068] Specifically, when the optical engine 1 is in use, the vertical distance from the center point of the first light-transmitting area 51 to the plane where the projection screen 2 is located is equal to the product of the projection ratio of the optical engine 1 and the width of the display area on the projection screen 2. The width of the display area refers to the dimension of the display area along the horizontal direction. In this way, when the optical engine 1 is in use, it ensures that the light beam emitted by the optical engine 1 can be accurately projected onto the display area of ​​the projection screen 2, and also ensures the clarity of the image displayed on the projection screen 2.

[0069] Since the projection ratio is a performance parameter of the optical engine 1 itself, its projection ratio is related to the selected optical engine 1. That is, different optical engines 1 will result in different projection ratios, and consequently, different vertical distances from the center point of the first light-transmitting area 51 to the plane where the projection screen 2 is located. Thus, in actual setup, the vertical distance from the center point of the first light-transmitting area 51 to the plane where the projection screen 2 is located is calculated using the projection ratio of the optical engine 1 and the width of the display area, thereby ensuring that the light beam emitted by the optical engine 1 can be completely projected onto the display area of ​​the screen.

[0070] Furthermore, when the first housing 5 and the optical engine 1 are located directly below or above the projection screen 2, the vertical distance from the center point of the first light-transmitting area 51 to the two vertical sides of the projection screen 2 is equal. In this way, the projection formed by the light beam emitted from the optical engine 1 is located in the central region of the projection screen 2.

[0071] Optionally, in this embodiment, the projection screen 2 includes a support frame and a screen panel, and the screen panel is an optical screen panel. For example, the optical screen panel is a Fresnel optical screen or a black grid screen. Such an optical screen panel has higher optical gain than a traditional screen and can reproduce the brightness and contrast of the light beam as much as possible.

[0072] In some embodiments, such as Figure 6 and Figure 7As shown, when the projection screen 2 is fixed to the support, a hook 21 is provided on the back of the projection screen 2. The hook 21 can support the projection screen 2, and the hook 21 has multiple holes 22 distributed along the height direction. In this way, after the fixing screw 23 is fixedly connected to the support, it can be connected to the fixing screw 2 through any one of the holes 22 on the hook 21 to realize the fixed connection between the projection screen 2 and the support. In addition, the fixing screw 23 can pass through the holes 22 at different heights to realize the height adjustment of the projection screen 2, that is, to realize the height adjustment of the laser projection device. It should be noted that in this embodiment of the application, the support is a wall or a fixed bracket, etc.

[0073] Optionally, in this embodiment, the connecting frame 3 has a planar structure or an L-shaped cross-section.

[0074] In some embodiments, such as Figure 2 As shown, the connecting frame 3 has a planar structure.

[0075] Optionally, the connecting frame 3 includes a plurality of straight connecting rods 31 and a first connecting shaft 32. The first ends of the plurality of straight connecting rods 31 are fixedly connected to the first connecting shaft 32, and the second ends of the plurality of straight connecting rods 31 are fixedly connected to the projection screen 2. The optical engine 1 is rotatably connected to the first connecting shaft 32.

[0076] Optionally, the optical engine 1 is rotatably connected to the first connecting shaft 32 based on the side edge of the light-emitting side near the projection screen 2, such that... Figure 2 and Figure 3 As shown, for optical engine 1 in the direction from right to left, optical engine 1 from... Figure 2 The position corresponding to the first reference angle in the example is rotated clockwise to... Figure 3 The position corresponding to the second reference angle in the example. Alternatively, the optical engine 1 can be rotatably connected to the first connecting shaft 32 based on the side edge of the side opposite to the light-emitting side that is close to the projection screen 2. In this way, for the optical engine 1 in the right-to-left direction, the optical engine 1 can rotate counterclockwise from the position corresponding to the first reference angle to the position corresponding to the second reference angle.

[0077] It should be noted that when the optical engine 1 is located directly below or above the projection screen 2, the side edge in this embodiment is a horizontal side edge; when the optical engine 1 is located to the left or right of the projection screen 2, the side edge in this embodiment is a vertical side edge.

[0078] Optionally, the optical engine 1 is hinged to the first connecting shaft 32 to allow the optical engine 1 to rotate relative to the first connecting shaft 32. Of course, in other embodiments, the optical engine 1 has a through hole, allowing it to be rotatably connected to the connecting shaft via the through hole, thus enabling rotation of the optical engine 1.

[0079] In some embodiments, the multiple linear connecting rods 31 are all telescopic rods. Thus, by extending or shortening the multiple linear connecting rods 31, the relative height relationship between the projection screen 2 and the optical engine 1 can be adjusted, thereby adjusting the height of the light emission port of the optical engine 1 relative to the projection screen 2. Simultaneously, the angle between the line connecting the center point of the light emission port and the center point of the projection screen 2 and the vertical direction can be adjusted, thereby adapting to different angle requirements of the emitted beam from the optical engine 1. Furthermore, when the optical engine 1 is no longer in use, the shortening of the multiple linear connecting rods 31 reduces the vertical distance between the optical engine 1 and the projection screen 2, thereby reducing the overall size of the optical engine 1 after its connection with the projection screen 2.

[0080] In some embodiments, such as Figure 2 As shown, the connecting frame 3 also includes multiple support rods 33, which are fixed to the back of the projection screen 2, and one end of each support rod 33 is fixedly connected to the second end of the straight connecting rod 31. In this way, the support rods 32 not only achieve a fixed connection between the connecting frame 3 and the projection screen 2, but also provide support for the projection screen 2, thereby improving the stability of the connection between the projection screen 2 and the optical engine 1.

[0081] Optionally, such as Figure 3 As shown, the connecting frame 3 also includes a support platform 36, which is used for fixed connection with the support body. One end of the support rod 33 is fixedly connected to the support platform 36. In this way, the support platform 36 can support the support rod 33, thereby enabling the support rod 33 to support the projection screen 2 more stably. The support platform 36 has a cuboid structure.

[0082] In other embodiments, such as Figure 8 As shown, the connecting frame 3 has an L-shaped cross-section. This allows the connecting frame 3 to extend in a direction perpendicular to the projection screen 2, thus facilitating adjustment of the dimensions between the optical engine 1 connected to the connecting frame 3 and the projection screen 2 in the direction perpendicular to the projection screen 2.

[0083] Optionally, the connecting frame 3 includes multiple L-shaped connecting rods 34 and a second connecting shaft 35. The first ends of the multiple L-shaped connecting rods 34 are fixedly connected to the second connecting shaft 35, and the second ends of the multiple L-shaped connecting rods 34 are fixedly connected to the projection screen 2. The optical engine 1 is rotatably connected to the second connecting shaft 35. The first end of each L-shaped connecting rod 34 is the end of one of its support rods, and the second end of each L-shaped connecting rod 34 is the end of the other support rod.

[0084] When the overall shape of the optical engine 1 is a cuboid, the optical engine 1 can be rotatably connected to the second connecting shaft 35 based on the side edge of its light-emitting side that is close to the projection screen 2, and can also be rotatably connected to the second connecting shaft 35 based on the middle part of the optical engine 1 in the vertical direction of the projection screen 2, or the side wall of the optical engine 1 on the side opposite to the light-emitting side.

[0085] It should be noted that when the optical engine 1 is rotatably connected to the second connecting shaft 35 at its center in the vertical direction of the projection screen 2, the connecting frame 3 includes two L-shaped connecting rods 34, and the first ends of the two L-shaped connecting rods 34 are respectively fixedly connected to the two ends of the second connecting shaft 35. In this way, the optical engine 1 located between the two L-shaped connecting rods 34 can achieve rotatable connection between its center in the vertical direction of the projection screen 2 and the second connecting shaft 35.

[0086] When the optical engine 1 is rotatably connected to the second connecting shaft 35 based on its side edge near the projection screen 2, the connection and rotation methods of the optical engine 1 and the second connecting shaft 35 are the same as or similar to the connection and rotation methods of the optical engine 1 and the first connecting shaft 32 in the previous embodiment. When the optical engine 1 is rotatably connected to the second connecting shaft 35 based on the middle part of the optical engine 1 in the vertical direction of the projection screen 2, the optical engine 1 can rotate clockwise from the position corresponding to the first reference angle to the position corresponding to the second reference angle, and also can rotate counterclockwise from the position corresponding to the first reference angle to the position corresponding to the second reference angle. Similarly, when the optical engine 1 is rotatably connected to the second connecting shaft 35 based on the side wall of the optical engine 1 opposite to the light-emitting side, the optical engine 1 can rotate clockwise from the position corresponding to the first reference angle to the position corresponding to the second reference angle, and also can rotate counterclockwise from the position corresponding to the first reference angle to the position corresponding to the second reference angle.

[0087] Optionally, the supports parallel to the projection screen 2 on the plurality of L-shaped connecting rods 34 are all telescopic rods. In this way, the beneficial effects of the plurality of telescopic L-shaped connecting rods 34 are similar to those of the plurality of telescopic straight connecting rods 31 described above, and will not be elaborated further in this embodiment.

[0088] Optionally, the support rods perpendicular to the projection screen 2 on the multiple L-shaped connecting rods 34 are also telescopic rods. This facilitates adjustment of the vertical distance from the light outlet of the optical engine 1 to the plane where the projection screen 2 is located, and also allows adjustment of the angle between the line connecting the center point of the light outlet and the center point of the projection screen 2 and the vertical direction.

[0089] In this way, when the optical engine 1 is no longer in use, not only can the vertical distance between the optical engine 1 and the projection screen 2 be reduced by the connecting bracket 3, but also the vertical distance between the optical engine 1 and the projection screen 2 can be reduced by the connecting bracket 3, thereby significantly reducing the overall size of the optical engine 1 and the projection screen 2 after they are connected.

[0090] In some embodiments, such as Figure 8 As shown, when the connecting frame 3 includes multiple support rods 33, the multiple support rods 33 are fixed to the back of the projection screen 2, and one end of the support rod 33 can also be fixedly connected to the second end of the L-shaped connecting rod 34. In this way, the support rods 33 can also support the projection screen 2 to improve the stability of the connection between the projection screen 2 and the optical engine 1.

[0091] In some embodiments, functional component 4 includes a control motherboard 43, which is located within the first housing 5 and electrically connected to the optical engine 1. The control motherboard 43 is a television (TV) motherboard, possessing external hardware interfaces capable of connecting to computers, mobile phones, USB flash drives, etc. The control motherboard 43 can receive audio and video signals transmitted from computers, mobile phones, USB flash drives, etc., decode these signals to obtain video signals, and then transmit the video signals to the optical engine 1.

[0092] In some embodiments, functional component 4 includes a speaker 44 located within the first housing 5 and electrically connected to the control motherboard 43. The control motherboard 43 is capable of decoding the received audio and video signals to obtain audio signals, and then transmitting the decoded audio signals to the speaker 44 for audio playback, thereby meeting the user's audiovisual needs.

[0093] In some embodiments, functional component 4 includes a power board 45 located within the first housing 5 and electrically connected to the control motherboard 43. The power board 45 can output voltage or current drive signals to power devices such as the control motherboard 43 and the speaker 44. Additionally, the power board 45 is connected to the optical engine 1 via wires. When the optical engine 1 includes a laser light source 11, the power board 45 can supply power to the laser included in the laser light source 11. Optionally, the wires are embedded in the connector 3 to save space and enhance the aesthetics of the laser projection device.

[0094] Optionally, functional component 4 also includes a display panel 46, a remote controller, etc. The control motherboard 43 is electrically connected to both the display panel 46 and the remote controller. The control motherboard 43 can transmit the decoded video signal to the display panel 46, which converts the video signal into a drive signal and transmits it to the DMD board included in the optical engine 1, so that the DMD board can drive the micromirrors on the DMD to deflect based on the drive signal. Additionally, the power board 45 can also supply power to the display panel 46, the remote controller, and other devices.

[0095] The control motherboard 43 is also used to receive remote control signals transmitted by the remote controller and control the switching of the display screen imaged by the optical engine 1 based on the remote control signals. The remote controller includes buttons, which are electrically connected to the control motherboard 43. The buttons include a power button, volume buttons, etc., and can be physical buttons or virtual buttons.

[0096] Optionally, functional component 4 includes a wireless module electrically connected to the control motherboard 43. The wireless module includes a Bluetooth module and / or a Wi-Fi (Wireless-Fidelity) module. The Wi-Fi module is used to connect the laser projection device to the wireless internet.

[0097] In some embodiments, the functional component 4 is located on the connecting frame 3. In this case, the connecting frame 3 is provided with a box or support plate for placing the functional component 4. Of course, the functional component 4 can also be placed on the connecting frame 3 in other ways, as long as the connecting frame 3 can stably support the functional component 4.

[0098] In other embodiments, when the projection screen 2 includes a support frame and a screen panel, the functional component 4 is located on the back of the support frame, which is also the back of the projection screen 2. For example, as... Figure 2 As shown, the control board 43, speaker 44 and power board 45 are all located on the back of the support frame.

[0099] In other embodiments, when the optical engine 1 includes a first housing 5, the functional component 4 is disposed within the first housing 5. This places the functional component 4 closer to the optical engine 1, facilitating the connection between the functional component 4 and the optical engine 1. Furthermore, since the functional component 4 is hidden within the first housing 5, the aesthetics of the laser projection device can be improved.

[0100] In some other embodiments, such as Figure 9 and Figure 10As shown, the laser projection device also includes a second housing 6 and a third housing 7; the second housing 6 and the third housing 7 are located on opposite sides of the first housing 5, and both the second housing 6 and the third housing 7 are connected to the connecting frame 3; the functional component 4 includes a first sub-functional component 41 and a second sub-functional component 42, the first sub-functional component 41 being located inside the second housing 6 and the second sub-functional component 42 being located inside the third housing 7. In this way, both the first sub-functional component 41 and the second sub-functional component 42 can be close to the optical engine 1, facilitating their connection to the optical engine 1; furthermore, the first sub-functional component 41 is hidden inside the second housing 6, and the second sub-functional component 42 is hidden inside the third housing 7, thereby improving the aesthetics of the laser projection device.

[0101] It should be noted that, in addition to the four types of placement of the functional components 4 described above, the five placement positions can also be combined based on the various devices included in the functional components 4. This application embodiment does not limit this.

[0102] For example, such as Figure 2 As shown, display panel 46 is mounted on connector 3. Alternatively, as... Figure 3 As shown, the display panel 46 can also be disposed within the first housing 5. (As indicated...) Figure 2 As shown, the control motherboard 43, speaker 44, and power board 45 are all located on the back of the projection screen 2; Figure 9 As shown, the control motherboard 43 is located inside the second housing 6, the power board 45 is located inside the third housing 7, and there are two speakers 44, which are located inside the second housing 6 and the third housing 7 respectively; Figure 10 As shown, both the control motherboard 43 and the power supply board 45 are mounted on the connector bracket 3; Figure 11 As shown, the control motherboard 43 is housed within the second housing 6, and the power board 45 is housed within the third housing 7. Of course, the control motherboard 43, speaker 44, and power board 45 can all be housed within the first housing 5.

[0103] It should be noted that, because the connection between the display panel 46 and the optical engine 1 is relatively short, when the optical engine 1 needs to be rotated and moved, the display panel 46 is placed inside the first housing 5, thereby facilitating the coordinated movement of the display panel 46, the optical engine 1, and the first housing 5. Additionally, as... Figure 3 As shown, when the optical engine 1 rotates toward the projection screen 2, the distance between the optical engine 1 and the connecting frame 3 decreases, and the display panel 46 is placed on the connecting frame 3, which still meets the requirement of a short connection between the display panel 46 and the optical engine 1 included in the optical engine 1.

[0104] It should also be noted that when the functional component 4 is not located within the first housing 5, the size of the optical engine 1 is reduced. Furthermore, compared to having the functional component 4 located within the optical engine 1, it is easier for the user to replace the components included in the functional component. Additionally, since the functional component 4 does not interfere with the optical engine 1, the heat dissipation channels of the optical engine 1 can be improved, increasing its heat dissipation efficiency. Moreover, the reduction in internal components of the optical engine 1 simplifies the wiring of these components, thereby improving the production efficiency of the optical engine 1.

[0105] When the laser projection device includes a second housing 6 and a third housing 7, in some embodiments, the second housing 6 and the third housing 7 are fixedly connected to the connecting frame 3, or the connection methods of the second housing 6 and the third housing 7 to the connecting frame 3 are the same as or similar to the connection methods of the first housing 5 and the connecting frame 3. This application will not elaborate further on this aspect in the embodiments.

[0106] Optionally, the second shell 6, the first shell 5, and the third shell 7 form a T-shaped structure. Wherein, as... Figure 10 As shown, when the optical engine 1 is in use, the second housing 6, the first housing 5, and the third housing 7 have a T-shaped structure in the direction perpendicular to the plane of the projection screen 2. When the optical engine 1 is no longer in use, the first housing 5 is rotated 90° clockwise from right to left to obtain the following shape: Figure 11 The state shown is such that the second housing 6, the first housing 5, and the third housing 7 have a T-shaped structure in the direction parallel to the plane of the projection screen 2. The second housing 6 and the third housing 7 have the same shape and volume, thus ensuring the aesthetics of the first housing 5 and the second housing 6 and the third housing 7 located on opposite sides of the first housing 5 when combined. For example, the second housing 6 and the third housing 7 are both rectangular parallelepipeds, and the first housing 5 is also a rectangular parallelepiped.

[0107] Optionally, such as Figure 10 As shown, the second housing 6 and the connecting frame 3, and the third housing 7 and the connecting frame 3 are fixedly connected. When the distance between the projection screen 2 and the optical engine 1 remains fixed, at least one of the multiple support rods 33 included in the connecting frame 3 is fixedly connected to both the projection screen 2 and the second housing 6, and at least one support rod 33 is connected to both the projection screen 2 and the third housing 7. In this way, the multiple support rods 33 can support the projection screen 2 and improve the flatness of the projection screen 2, and the multiple support rods 33 can improve the stability of the connection between the projection screen 2 and the optical engine 1.

[0108] In some embodiments, the laser projection device further includes a heat sink, which includes a water-cooled heat sink 8 and an air-cooled heat sink 9.

[0109] Optionally, such as Figure 2 As shown, the water-cooled radiator 8 mainly includes heat dissipation pipes. The ends of the heat dissipation pipes extend into the first housing 5 and are connected to the optical engine 1. The heat dissipation pipes can be laid on the back of the projection screen 2, or placed in the second housing 6 or the third housing 7. In this way, the water-cooled radiator 8 can dissipate heat from the optical engine 1. Since only a portion of the pipes of the water-cooled radiator 8 extend into the first housing 5, it saves space within the first housing 5, thus facilitating the miniaturization design of the optical engine 1.

[0110] It should be noted that the part of the heat dissipation pipe that extends into the first housing 5 is a flexible pipe, which can be flexibly connected to the optical engine 1 to accommodate the rotation of the first housing 5 and the optical engine 1 in any direction.

[0111] Optionally, when the radiator includes an air-cooled radiator 9, the optical engine 1 has a heat dissipation channel. For example... Figure 10 As shown, the air-cooled radiator 9 is located inside the first housing 5. In other embodiments, the air-cooled radiator 9 is located inside the second housing 6 or the third housing 7. Simultaneously, the end of the air-cooled radiator 9 extends into the first housing 5, and the air outlet of the air-cooled radiator 9 is connected to the heat dissipation channel of the optical engine 1. In this way, the air-cooled radiator 9 can dissipate heat from the optical engine 1; when the air-cooled radiator 9 is located inside the second housing 6 or the third housing 7, it also saves space inside the first housing 5.

[0112] It should be noted that the material of the part of the air-cooled radiator 9 that extends into the first housing 5 is a soft material, so that it can be flexibly connected with the optical engine 1 to accommodate the rotation of the first housing 5 and the optical engine 1 in any direction.

[0113] In this embodiment, the connecting frame integrates the optical engine and the projection screen into a single unit. Therefore, the optical engine is less prone to displacement relative to the projection screen, ensuring that the beam emitted by the optical engine is projected onto the correct position on the projection screen, guaranteeing a good projection effect. Since the optical engine can switch between retracted and extended states, its projection function is maintained while reducing the overall size of the laser projection device when the optical engine is not in use. Furthermore, because the functional components are set independently of the optical engine, the overall size of the optical engine is reduced, further achieving miniaturization of the laser projection device. When multiple linear connecting rods are telescopic, the relative position of the projection screen and the optical engine can be adjusted through the telescopic action of these rods. This allows adjustment of the height of the optical engine's light outlet relative to the projection screen, as well as the angle between the line connecting the center point of the light outlet and the center point of the projection screen and the vertical direction, thus adapting to different angle requirements of the emitted beam from the optical engine. Furthermore, when the optical engine is no longer in use, the vertical distance between the optical engine and the projection screen is shortened by the shortening effect of multiple straight connecting rods, thereby reducing the overall size of the optical engine after it is connected to the projection screen.

[0114] The above description is merely an illustrative embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present application should be included within the protection scope of the present application.

Claims

1. A laser projection device, characterized in that, The laser projection device includes: an optical engine, a projection screen, a connecting frame, functional components, a bracket, a hook, and a heat sink; Both the optical engine and the projection screen are connected to the connecting frame. A limiting groove is provided on the optical engine at the position where it is connected to the connecting frame. The optical engine can rotate relative to the connecting frame so that the angle between the light-emitting side of the optical engine and the projection screen switches between a first reference angle and a second reference angle, so as to realize the lowering or retraction of the optical engine. At least one of the projection screen and the connecting frame is used to be fixedly connected to the support. The optical engine is electrically connected to the functional components and is able to emit a light beam in cooperation with the functional components; The projection screen is used to reflect the light beam emitted by the optical engine to display an image; The bracket extends in a direction perpendicular to the projection screen. The bracket has a U-shaped structure. Both ends of the bracket are fixedly connected to the connecting frame, and the bracket extends away from the plane where the connecting frame is located. The hook is located on the back of the projection screen. The hook has multiple holes distributed along the height direction. The projection screen and the support are fixedly connected by any one of the holes on the hook and a fixing screw in the empty space. The radiator is either a water-cooled radiator or an air-cooled radiator, and the optical engine dissipates heat through the radiator. The connecting frame has an L-shaped cross-section. The connecting frame includes multiple L-shaped connecting rods and a second connecting shaft; The first ends of the plurality of L-shaped connecting rods are fixedly connected to the second connecting shaft, the second ends of the plurality of L-shaped connecting rods are fixedly connected to the projection screen, and the optical engine is rotatably connected to the second connecting shaft; When the optical engine is rotatably connected to the second connecting shaft at the center of the projection screen in the vertical direction, or when the sidewall of the optical engine on the side opposite to the light-emitting side is rotatably connected to the second connecting shaft, the optical engine can rotate clockwise from the position corresponding to the first reference angle to the position corresponding to the second reference angle, and can also rotate counterclockwise from the position corresponding to the first reference angle to the position corresponding to the second reference angle.

2. The laser projection device as described in claim 1, characterized in that, The connecting frame has a planar structure; The connecting frame includes multiple straight connecting rods and a first connecting shaft; The first ends of the plurality of linear connecting rods are fixedly connected to the first connecting shaft, the second ends of the plurality of linear connecting rods are fixedly connected to the projection screen, the optical engine is rotatably connected to the first connecting shaft, and the plurality of linear connecting rods are all telescopic rods.

3. The laser projection device as described in claim 2, characterized in that, The connecting frame also includes multiple support rods; Multiple support rods are fixed to the back of the projection screen, and one end of each support rod is fixedly connected to the second end of the straight connecting rod.

4. The laser projection device as described in claim 1, characterized in that, All of the L-shaped connecting rods with support rods parallel to the projection screen are telescopic rods.

5. The laser projection device as described in any one of claims 1-4, characterized in that, The connecting frame also includes a bracket extending in a direction perpendicular to the projection screen, the bracket being used to support the optical engine when the optical engine is lowered.

6. The laser projection device as described in any one of claims 1-4, characterized in that, The laser projection device also includes a first housing; The first housing is rotatably connected to the connecting frame. The shell wall of the first housing has a first light-transmitting area. The optical engine is located inside the first housing. When the optical engine is lowered, the light beam emitted by the optical engine can pass through the first light-transmitting area and be emitted to the projection screen.

7. The laser projection device as described in claim 6, characterized in that, The laser projection device also includes a second housing and a third housing; The second housing and the third housing are located on opposite sides of the first housing, and both the second housing and the third housing are connected to the connecting frame; The functional component includes a first sub-functional component and a second sub-functional component, wherein the first sub-functional component is located within the second housing and the second sub-functional component is located within the third housing.

8. The laser projection device as described in claim 7, characterized in that, The second housing, the first housing, and the third housing constitute a T-shaped structure.

9. The laser projection device as described in claim 6, characterized in that, The functional components include a control motherboard located within the first housing and electrically connected to the optical engine.

10. The laser projection device as described in claim 9, characterized in that, The functional component includes a speaker located inside the first housing, and the speaker is electrically connected to the control motherboard.

11. The laser projection device as described in claim 9, characterized in that, The functional component includes a power board located inside the first housing, and the power board is electrically connected to the control motherboard.

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