Miniature projection device

Abstract

The utility model relates to the technical field of small projectors, in particular to a miniature projection device which comprises a shell, a mounting groove is formed in the shell, and a cover plate with a light hole is detachably connected to one side of the mounting groove. The Micro-LED chip is matched with the driving panel to be arranged in the mounting groove, and light emitted by the Micro-LED chip is emitted out through the light hole; the heat dissipation piece is fixedly arranged on the back of the shell and is used for dissipating heat of the driving panel; the projection device further comprises a projection lens which is coaxially arranged at the light hole. Wherein the shell is provided with a long-strip-shaped hole which is communicated with the mounting groove, and a flat cable connector is led out from the driving panel through the long-strip-shaped hole; according to the utility model, the problem that the overall size is still relatively large due to the basic projection structure composition of the existing small projector can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of small projectors, in particular to a micro-projection device. Background Art

[0002] The existing ones mainly include DLP projectors, laser projectors and LED projectors. The basic projection principles of the above common small projectors all roughly follow the same optical projection principle. Specifically, the projector is mainly composed of a light source, an optical system and a display chip. The light source emits light, which passes through components such as lenses and reflectors of the optical system to evenly irradiate the light onto the display chip. The display chip carries image information, and the circuit system controls the brightness of pixels to form an image on the display chip. Finally, the projection lens enlarges the image on the display chip and projects it onto the screen to form a picture that the audience can see.

[0003] Due to the need to carry a relatively large and volume-required optical lens structure module, and the need for heat dissipation components to effectively dissipate heat for the processing chip in order to ensure higher lumens and better display effects, the size of existing small projectors is still relatively large. Utility Model Content

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a micro-projection device, which can effectively solve the problem that the basic projection structure of the existing small projector still results in a relatively large overall volume.

[0006] Technical Solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The utility model provides a micro-projection device, comprising a shell, a mounting groove is formed inside the shell, and a cover plate with a light-transmitting hole is detachably connected to one side of the mounting groove;

[0009] and a Micro-LED chip, which is arranged in the installation slot in cooperation with the driving panel, and the Micro-LED chip emits light through the light-transmitting hole;

[0010] and a heat sink fixedly arranged on the back of the shell for dissipating heat for the drive panel; and also comprising a projection lens, the projection lens being coaxially arranged at the light-transmitting hole; wherein, the shell is provided with an elongated hole penetrating the mounting groove, and a cable connector is led out from the drive panel through the elongated hole.

[0011] Furthermore, the heat sink comprises a heat sink and a heat sink fan, the shell is integrally formed at one end of the heat sink, and the heat sink fan is fixed at the other end of the heat sink.

[0012] Furthermore, the drive panel is fixed in the mounting groove through a heat dissipation aluminum plate.

[0013] Furthermore, the main body of the shell and the heat sink is a rectangular body, the heat sink is provided with a plurality of heat sink columns spaced apart in a matrix, and connecting columns for fixing the heat sink fan are provided around it, and the heat sink fan is flush with the heat sink around it.

[0014] Furthermore, a cross section of the shell parallel to the cover plate is a square surface, and a side length of the square surface is 20-30 mm.

[0015] Furthermore, the projection lens includes two parts, a male head and a female seat, which together form a light-transmitting channel, and a plurality of lens bodies are distributed in the light-transmitting channel. The female seat is fixed in the mounting groove, and the male head is threadedly connected to the female seat through the light-transmitting hole.

[0016] Beneficial Effects

[0017] Compared with the known public technology, the technical solution provided by the utility model has the following beneficial effects:

[0018] The micro-projection module of this product adopts the Micro-LED chip as the core component of the screen projection display. The Micro-LED chip has the self-luminous and image display capabilities. Compared with the existing projector, the optical system structure composed of components such as lenses and reflectors is not required, which greatly reduces the product volume. At the same time, the support and heat dissipation components designed around it are also relatively small, so that the volume of this projection module can be reduced by 3-4 times compared with existing products, and better portability can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a front perspective view of the micro-projection device of the present utility model;

[0021] Figure 2 It is a rear perspective view of the micro-projection device of the present utility model;

[0022] Figure 3 This is an exploded view of the components of the micro-projection device of the present utility model;

[0023] The numbers in the figure represent: 10, shell; 11, installation groove; 12, cover plate; 13, light-transmitting hole; 14, long hole; 20, Micro-LED chip; 30, projection lens; 31, male connector; 32, female connector; 33, light-transmitting channel; 40, cable connector; 50, heat sink; 51, heat sink column; 52, connecting column; 60, cooling fan; 70, heat sink aluminum plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The present invention will be further described below in conjunction with the embodiments.

[0026] Example:

[0027] The utility model provides a micro-projection device, referring to Figure 1-3 The main structure of the product includes a housing 10 for supporting installation, a mounting groove 11 is formed inside the housing 10, and a cover plate 12 with a light-transmitting hole 13 is detachably connected to one side of the mounting groove 11;

[0028] The Micro-led chip 20, which serves as the core of light emission and display, is arranged in the installation slot 11 with a matching driving panel, and the light emitted by the Micro-led chip 20 is emitted through the light-transmitting hole 13; wherein, a long hole 14 penetrating the installation slot 11 is opened on the shell 10, and a cable connector 40 is led out of the driving panel through the long hole 14.

[0029] And a heat sink for the Micro-led chip 20 and the driving panel, which is fixedly arranged on the back of the shell 10 and is used for dissipating heat for the driving panel; it also includes a projection lens 30, which is coaxially arranged at the light-transmitting hole 13 and is used to illuminate the Micro-led chip 20 and magnify the display image through multiple sets of internal lenses.

[0030] It is worth mentioning that this product is a complete projection module, but in the specific use of image projection, it is necessary to establish a communication connection with the external board for outputting the image through the cable connector 40 led out through the drive panel, so as to realize the projection function of the external image.

[0031] The micro-projection module of this product adopts the Micro-led chip 20 as the core component of the screen projection display. The Micro-led chip 20 has the self-luminescence and image display capabilities. Since the Micro-led chip 20 is a solid-state semiconductor device, the Micro-led chip 20 is a prior art. Here is a brief description of its basic working principle: it can directly convert electrical energy into light energy. Its core principle lies in the working principle of the LED light-emitting diode, which is based on the characteristics of the PN junction. When a forward voltage is applied to the LED, the electrons in the N region will be pushed to the P region, recombine with the holes in the P region, and then emit energy in the form of photons. This process enables the Micro-led chip 20 to emit light. It is assembled on the drive panel to form a display technology of a high-density LED array. Each pixel can be addressed and controlled and independently driven to emit light, which enables it to directly display images and text. In terms of display, the Micro-led chip 20 has the advantages of self-luminescence, high efficiency, low power consumption, high integration, high stability, and all-weather operation.

[0032] Therefore, compared with the prior art projector, the optical system structure composed of components such as lenses and reflectors is not required, which greatly reduces the product volume. At the same time, the support and heat dissipation components designed around it are also relatively small, so that the volume of this projection module can be reduced by 3-4 times compared with existing products, and better portability can be achieved.

[0033] The following is a description of the preferred implementation of this product:

[0034] In the design of the heat sink, the heat sink includes a heat sink 50 and a heat sink fan 60. The shell 10 is integrally formed at one end of the heat sink 50 and is made of aluminum alloy or copper. The heat sink 50 is fixed with the heat sink fan 60 at the other end. The shell 10 and the heat sink 50 are rectangular bodies. Specifically, the cross section of the shell 10 parallel to the cover plate 12 is a square surface, and the side length of the square surface is 20-30 mm. Keep the product volume small,

[0035] The heat sink 50 is provided with a plurality of heat sink columns 51 distributed in a matrix, and is surrounded by connecting columns 52 for fixing the heat sink fan 60. The surroundings of the heat sink fan 60 are flush with the surroundings of the heat sink 50, so as to keep the projection module with a good flat shape as a whole, and the appearance is neat and convenient for storage.

[0036] In the specific heat dissipation assembly, the drive panel is fixed in the installation groove 11 through the heat dissipation aluminum plate 70, and the heat of the drive panel and the Micro-led chip 20 is conducted to the heat sink 50 by utilizing the larger thermal conductivity of the heat dissipation aluminum plate 70. The heat dissipation seat 50 is completely exposed to the air, and the air cooling of the heat dissipation fan 60 is utilized to take away the heat generated by the drive panel and the Micro-led chip 20 by multiple heat dissipation columns 51 on the heat sink 50, thereby achieving efficient removal of the heat generated by the drive panel and the Micro-led chip 20.

[0037] In addition, the combination of lens bodies inside the projection lens 30 adopted in this embodiment is the prior art. In the design of the projection lens 30, this product designs the outer shell of the projection lens 30 into two parts, a male head 31 and a female seat 32. The male head 31 and the female seat 32 together constitute a light-transmitting channel 33. A plurality of lens bodies are distributed in the light-transmitting channel 33. The female seat 32 is fixed in the mounting groove 11. The male head 31 passes through the light-transmitting hole 13 and is threadedly connected to the female seat 32. In this way, by rotating the male head 31 extending out of the outside of the cover plate 12, the focusing function of the projection lens 30 can be achieved.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A micro-projection device, characterized in that: include: A housing having an installation slot formed therein, and a cover plate with a light-transmitting hole detachably connected to one side of the installation slot; A Micro-LED chip is arranged in the installation groove in cooperation with the driving panel, and the light emitted by the Micro-LED chip is emitted through the light-transmitting hole; A heat sink, fixedly disposed on the back of the housing, for dissipating heat for the drive panel; A projection lens, wherein the projection lens is coaxially arranged at the light transmission hole; Wherein, the shell is provided with a long hole which penetrates the mounting groove, and a cable connector is led out from the driving panel through the long hole.

2. A micro-projection device according to claim 1, characterized in that: The heat sink comprises a heat sink and a heat sink fan. The shell is integrally formed at one end of the heat sink, and the heat sink fan is fixed at the other end of the heat sink.

3. A micro-projection device according to claim 2, characterized in that: The drive panel is fixed in the mounting groove through a heat dissipation aluminum plate.

4. A micro-projection device according to claim 3, characterized in that: The main body of the shell and the heat sink is a rectangular body, and the heat sink is provided with a plurality of heat sink columns distributed at intervals in a matrix.

5. A micro-projection device according to claim 4, characterized in that: The cross section of the shell body parallel to the cover plate is a square surface.

6. The micro-projection device according to claim 1, characterized in that: The projection lens comprises two parts, a male head and a female seat. The male head and the female seat together form a light-transmitting channel, and a plurality of lens bodies are distributed in the light-transmitting channel.

7. A micro-projection device according to claim 6, characterized in that: The female base is fixed in the mounting groove, and the male head passes through the light-transmitting hole and is threadedly connected to the female base.

8. The micro-projection device according to claim 4, characterized in that: The heat sink is surrounded by connecting columns for fixing the heat sink fan.

9. A micro-projection device according to claim 8, characterized in that: The periphery of the heat dissipation fan is flush with the periphery of the heat dissipation seat.

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