Projection system

Abstract

The utility model provides a projection system. The projection system comprises a plurality of light sources with the same light emitting direction; the lighting assembly is located on the light emitting side of the light source; the multiple display chips correspond to the multiple light sources one to one and are located on the side, away from the light sources, of the illumination assembly; the plurality of projection lenses are in one-to-one correspondence with the plurality of display chips and are located at one side, far away from the illumination assembly, of the display chips, the optical axes of the projection lenses are vertical to the side length of one side of the corresponding display chip, the display chips are rectangular, and the optical axes of the projection lenses are vertical to the long side of the corresponding display chip. According to the utility model, the problem that the projection system in the prior art is difficult to give consideration to multi-projection and miniaturization at the same time is solved.

Description

Technical Field

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

[0002] With the development of optical display devices and the increase in market demand, projection technology has gradually attracted people's attention. The projection system with a single display chip has shown an upward development trend in recent years due to its price advantage. However, the projection system with a single display chip has low brightness, poor imaging quality and short service life, which has led researchers to develop multi-projection systems with multiple display chips. The projection system with multiple display chips has to be equipped with two sets of identical optical components, resulting in high production costs, large volume and high prices.

[0003] That is to say, the projection system in the prior art has the problem that it is difficult to take into account both multi-projection and miniaturization at the same time. Utility Model Content

[0004] The main purpose of the utility model is to provide a projection system to solve the problem that it is difficult to take into account both multi-projection and miniaturization in the projection system in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a projection system, including a light source, wherein there are multiple light sources, and the light emitting directions of the multiple light sources are the same; a lighting component, wherein the lighting component is located on the light emitting side of the light source; a display chip, wherein there are multiple display chips, the multiple display chips correspond one-to-one to the multiple light sources and are located on a side of the lighting component away from the light sources; and a projection lens, wherein there are multiple projection lenses, the multiple projection lenses correspond one-to-one to the multiple display chips and are located on a side of the display chip away from the lighting component, the projection lenses are vertically arranged to the corresponding display chips, the display chips are rectangular, and the optical axis of the projection lens is perpendicular to the long side of the corresponding display chip.

[0006] Furthermore, there are two light sources, which are located on the same horizontal plane, the number of display chips and projection lenses is the same as the number of light sources, and the two light sources selectively emit light.

[0007] Furthermore, the lighting assembly includes a focusing structure and a collimating structure in sequence along a direction away from the light source. There are multiple focusing structures, and the multiple focusing structures are arranged in a one-to-one correspondence with the multiple light sources. There are one or more collimating structures.

[0008] Furthermore, the focusing structure is a light bucket, the cross-sectional area of ​​which gradually decreases in the direction away from the light source; or the focusing structure is a focusing lens group, the focusing lens group includes a plurality of plano-convex lenses, and a first reflector is selectively arranged between the focusing lens group and the collimating structure.

[0009] Furthermore, the collimating structure is a Fresnel lens. When there is one collimating structure, one collimating structure has multiple collimating areas, and the multiple collimating areas correspond one-to-one to the multiple focusing structures. When there are multiple collimating structures, the multiple collimating structures are arranged at intervals, and the multiple collimating structures correspond one-to-one to the multiple focusing structures.

[0010] Furthermore, the projection system also includes a Fresnel imaging lens, which is located between the display chip and the projection lens. There are one or more Fresnel imaging lenses. When there is one Fresnel imaging lens, the Fresnel imaging lens has multiple imaging areas, and the multiple imaging areas correspond one-to-one to the multiple display chips; when there are multiple Fresnel imaging lenses, the multiple Fresnel imaging lenses are arranged at intervals and the multiple Fresnel imaging lenses correspond one-to-one to the multiple display chips.

[0011] Furthermore, the projection system also includes a second reflector, which is located between the display chip and the projection lens, so as to reflect the image light of the display chip to the projection lens, and multiple projection lenses share one second reflector; and / or the projection system also includes insulating glass, which is located between the lighting component and the display chip, and multiple light sources share one piece of insulating glass.

[0012] Furthermore, the projection system also includes a light source heat dissipation tube, an external circulation heat dissipation component, an internal circulation heat dissipation component, a circuit driving component and a speaker. The light source heat dissipation tube is located on a side of the light source away from the lighting component, the external circulation heat dissipation component and the internal circulation heat dissipation component are respectively located on a group of two opposite sides of the lighting component, the circuit driving component is located between the display chip and the projection lens, and the speaker is located on a side of the projection lens close to the light source.

[0013] Furthermore, the projection system also includes an internal circulation heat sink, a first internal circulation guide plate and a second internal circulation guide plate. The internal circulation heat sink is located on the side of the internal circulation heat dissipation component away from the lighting component, and the part of the internal circulation heat sink away from the light source is arc-shaped. The first internal circulation guide plate is arc-shaped. The arc-shaped first internal circulation guide plate is located on the side of the internal circulation heat dissipation component away from the light source and between the internal circulation heat sink and the display chip. The second internal circulation guide plate is located between the display chip and the speaker.

[0014] Furthermore, the length of the projection system is less than 220 mm, the width of the projection system is less than 150 mm, and the height of the projection system is less than 142 mm.

[0015] Applying the technical solution of the utility model, the projection system includes a light source, a lighting component, a display chip and a projection lens, wherein there are multiple light sources, and the light emitting directions of the multiple light sources are the same; the lighting component is located on the light emitting side of the light source; there are multiple display chips, and the multiple display chips correspond one-to-one to the multiple light sources and are located on the side of the lighting component away from the light source; there are multiple projection lenses, and the multiple projection lenses correspond one-to-one to the multiple display chips and are located on the side of the display chip away from the lighting component, the projection lenses and the corresponding display chips are vertically arranged, the display chips are rectangular, and the optical axis of the projection lens is perpendicular to the long side of the corresponding display chip.

[0016] The present application is capable of outputting multiple projection images by setting multiple display chips, thereby realizing multiple display modes, and realizing the function of multi-projection while increasing the projection brightness. The lighting component is used to project the light emitted by multiple light sources onto multiple display chips one by one, and the imaging light of the multiple display chips is received by multiple projection lenses one by one to ensure that the projection images can be presented stably and clearly. Setting the projection lens and the corresponding display chip vertically is conducive to planning the corresponding position relationship between the projection lens and the display chip. By adjusting the vertical setting of the two, the overall volume of the projection system can be compressed, ensuring that the projection system of the present application can be miniaturized while meeting the requirements of multi-projection. By reasonably planning the relative position of the projection lens and the display chip, it is not only conducive to the reasonable layout of other components of the projection system, ensuring the miniaturization of the system, but also can avoid the influence of stray light on the imaging of the projection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of a projection system according to a first embodiment of the present utility model is shown;

[0019] Figure 2 Shows Figure 1 A top view of a projection system;

[0020] Figure 3 Shows Figure 1 Left view of the projection system;

[0021] Figure 4 A schematic diagram of a projection system according to a second embodiment of the present utility model is shown;

[0022] Figure 5 Shows Figure 4 A top view of a projection system;

[0023] Figure 6Shows Figure 4 Left view of the projection system;

[0024] Figure 7 A schematic diagram of a projection system according to a third embodiment of the present invention is shown.

[0025] The above drawings include the following reference numerals:

[0026] 001, first light source; 002, second light source; 003, first light box; 004, second light box; 005, first Fresnel lens; 006, second Fresnel lens; 007, heat-insulating glass; 008, first display chip; 009, second display chip; 010, first Fresnel imaging lens; 011, second Fresnel imaging lens; 012, second reflector; 013, first projection lens; 014, second projection lens; 015, A first plano-convex lens; 016, a second plano-convex lens; 017, a third plano-convex lens; 018, a fourth plano-convex lens; 019, a first reflector; 020, a light source heat dissipation tube; 021, a fan; 022, heat dissipation fins; 023, an internal circulation heat dissipation component; 024, a first internal circulation guide plate; 025, a second internal circulation guide plate; 026, an internal circulation heat sink; 027, a circuit drive component; 028, a speaker; 029, a focus drive motor. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0030] In order to solve the problem that it is difficult to simultaneously take into account multi-projection and miniaturization in the projection system in the prior art, the utility model provides a projection system.

[0031] like Figures 1 to 7As shown, the projection system includes a light source, a lighting component, a display chip and a projection lens. There are multiple light sources, and the light emitting directions of the multiple light sources are the same; the lighting component is located on the light emitting side of the light source; there are multiple display chips, and the multiple display chips correspond one-to-one to the multiple light sources and are located on the side of the lighting component away from the light source; there are multiple projection lenses, and the multiple projection lenses correspond one-to-one to the multiple display chips and are located on the side of the display chip away from the lighting component, and the projection lenses and the corresponding display chips are arranged vertically.

[0032] The present application is capable of outputting multiple projection images by setting up multiple display chips, thereby realizing multiple display modes, and realizing the function of multi-projection while increasing the projection brightness. The lighting component is used to project the light emitted by multiple light sources onto multiple display chips one by one, and the imaging light of the multiple display chips is received by multiple projection lenses one by one to ensure that the projection images can be presented stably and clearly. The projection lens and the corresponding display chip are arranged vertically, which is conducive to planning the corresponding position relationship between the projection lens and the display chip. By adjusting the vertical arrangement of the two, the overall volume of the projection system can be compressed, ensuring that the projection system of the present application can be miniaturized while meeting the requirements of multi-projection.

[0033] Specifically, the display chip is rectangular, and the optical axis of the projection lens is perpendicular to the long side of the corresponding display chip. Specifically, the optical axis of the projection lens is perpendicular to the long side of the effective display area of ​​the corresponding display chip. By reasonably planning the relative position of the projection lens and the display chip, it is beneficial to the reasonable layout of other components of the projection system, ensuring the miniaturization of the system, and avoiding the influence of stray light on the imaging of the projection system.

[0034] It should be noted that the multiple light sources of the present application are located on one plane, and the multiple display chips are located on another plane.

[0035] In a specific embodiment of the present application, the display chip is an LCD chip, and the size of the LCD chip is 4.45 inches.

[0036] Specifically, the lighting assembly includes a focusing structure and a collimating structure in sequence along the direction away from the light source, and the focusing structure and the collimating structure are used to focus and collimate the light emitted by the light source, and reduce the loss of light when propagating in the projection system, so as to ensure that the light is effectively transmitted to the display chip. There are multiple focusing structures, and the multiple focusing structures are arranged in parallel. The multiple focusing structures are arranged one by one with the multiple light sources, so that the multiple focusing structures can respectively focus the light emitted by the corresponding multiple light sources, and can ensure that the light emitted by each light source can be adjusted by the corresponding focusing structure, so that the light can be accurately projected onto the display chip, improve the projection efficiency, and ensure the independence of the optical path.

[0037] In an optional embodiment of the present application, there is one collimating structure. In another optional embodiment of the present application, there are multiple collimating structures, and the multiple collimating structures are arranged in parallel and correspond one to one with the multiple focusing structures. By setting the collimating structure, it is ensured that the light is projected onto the display chip in a parallel state, thereby improving the brightness and uniformity of the imaging, making the imaging picture clearer.

[0038] In the present application, the collimating structure is a Fresnel lens, specifically a circular Fresnel lens. When there is one collimating structure, one collimating structure has multiple collimating areas, and the multiple collimating areas correspond one-to-one to the multiple focusing structures. Specifically, each collimating area is an independent circular Fresnel lens, and two adjacent collimating areas are arranged at intervals. The circular Fresnel lens includes a convex structure located at the center and a plurality of annular sawtooth structures concentrically arranged with the convex structure as the center. When there are multiple collimating structures, the multiple collimating structures are arranged at intervals, and the multiple collimating structures correspond one-to-one to the multiple focusing structures. At this time, each collimating structure is an independently arranged circular Fresnel lens and two adjacent circular Fresnel lenses are arranged at intervals.

[0039] like Figure 1 and Figure 4 As shown, the projection system also includes a Fresnel imaging lens, which is located between the display chip and the projection lens, and there are one or more Fresnel imaging lenses. When there is one Fresnel imaging lens, the Fresnel imaging lens has multiple imaging areas, and the multiple imaging areas correspond to the multiple display chips one by one, and each imaging area is an independent circular Fresnel lens; when there are multiple Fresnel imaging lenses, the multiple Fresnel imaging lenses are arranged at intervals on the same horizontal plane, and the multiple Fresnel imaging lenses correspond to the multiple display chips one by one, and each Fresnel imaging lens is a circular Fresnel lens. This structure can ensure that the light emitted by each display chip can be effectively focused and transmitted by the corresponding imaging area or Fresnel imaging lens.

[0040] It should be noted that compared with traditional lenses, circular Fresnel lenses are thinner and lighter, which is conducive to meeting the requirements of miniaturization of projection systems. Circular Fresnel lenses have stronger focusing ability on light, which is conducive to improving the imaging quality of projection systems.

[0041] like Figure 1 and Figure 4As shown, the projection system includes a second reflector 012, which is located between the display chip and the projection lens to reflect the image light of the display chip to the projection lens. In a specific embodiment of the present application, the second reflector 012 is located between the Fresnel imaging lens and the projection lens. Multiple projection lenses share one second reflector 012. By providing a second reflector 012 shared by multiple projection lenses, not only can the number of optical elements in the projection system be reduced and the structure of the projection system be simplified, but also the optical paths of the two projection lenses can be arranged more compactly to achieve miniaturization, and reduce the loss of light in the transmission process due to the lengthening of the optical path, thereby improving the imaging quality.

[0042] It should be noted that the second reflective element 012 is specifically a reflective mirror.

[0043] Specifically, the projection system further includes a heat-insulating glass 007, which is located between the lighting assembly and the display chip, and multiple light sources share a piece of heat-insulating glass 007. By providing the heat-insulating glass 007 between the lighting assembly and the display chip, the influence of the heat generated by the lighting assembly on the display chip can be blocked. Multiple light sources share a piece of heat-insulating glass 007, which can save the number of components, simplify the structure of the projection system, and achieve miniaturization.

[0044] In the present application, multiple display chips are provided, and the positions of the various devices are rationally planned. By combining each display chip with each optical element as an independent module, the installation and maintenance process of the projection system can be made more efficient, the stability and assembly reliability of the projection system can be improved, the production cost can be reduced, and a variety of projection modes can be realized. By rationally arranging the positions of the various optical devices, the length of the projection system of the present application is within the range of less than 220 mm, the width is within the range of less than 150 mm, and the height is within the range of less than 142 mm.

[0045] The projection system of the present application is described below in conjunction with specific embodiments and drawings.

[0046] Embodiment 1

[0047] like Figures 1 to 3 As shown, the projection system of the first embodiment is described.

[0048] like Figure 1 As shown, in this embodiment, the projection system includes a light source and an illumination assembly, a heat-insulating glass 007, a display chip, a Fresnel imaging lens, a second reflector 012, and a projection lens, which are sequentially arranged on the light-emitting side of the light source. The illumination assembly includes a focusing structure and a collimating structure in sequence along a direction away from the light source.

[0049] like Figures 1 to 3As shown, the light sources include two, namely a first light source 001 and a second light source 002. The first light source 001 and the second light source 002 are located on the same horizontal plane. The number of display chips, focusing structures, collimating structures, Fresnel imaging lenses, and projection lenses is the same as the number of light sources, which are two. The two light sources selectively emit light.

[0050] Specifically, the two focusing structures are both light buckets, which are hollow metal light buckets of a regular tetrahedral structure. The cross-sectional area of ​​the light bucket along the direction parallel to the light source gradually increases in the direction away from the light source. The two light buckets are respectively a first light bucket 003 and a second light bucket 004. The first light bucket 003 is located at the light exit side of the first light source 001, and the second light bucket 004 is located at the light exit side of the second light source 002. The two collimating structures are both Fresnel lenses, which are respectively a first Fresnel lens 005 and a second Fresnel lens 006. The first Fresnel lens 005 is located at the light exit side of the first light bucket 003, and the second Fresnel lens 006 is located at the light exit side of the second light bucket 004. The two display chips are respectively a first display chip 008 and a second display chip 009. The first display chip 008 The first Fresnel lens 005 is located at the light exiting side of the first Fresnel lens 005, and the second display chip 009 is located at the light exiting side of the second Fresnel lens 006; the two Fresnel imaging lenses are respectively the first Fresnel imaging lens 010 and the second Fresnel imaging lens 011, the first Fresnel imaging lens 010 is located at the light exiting side of the first display chip 008, and the second Fresnel imaging lens 011 is located at the light exiting side of the second display chip 009; the two projection lenses are respectively the first projection lens 013 and the second projection lens 014, the light emitted from the first Fresnel imaging lens 010 enters the first projection lens 013 after being reflected by the second reflector 012, and the light emitted from the second Fresnel imaging lens 011 enters the second projection lens 014 after being reflected by the second reflector 012.

[0051] For ease of understanding, the projection system can be divided into a first optical module and a second optical module. Taking the first optical module as an example, the first optical module includes a first light source 001, a first light bucket 003, a first Fresnel lens 005, a first display chip 008 and a first Fresnel imaging lens 010. The second optical module includes a second light source 002, a second light bucket 004, a second Fresnel lens 006, a second display chip 009 and a second Fresnel imaging lens 011. The light paths of the two optical modules are parallel. The two modules share a piece of heat-insulating glass 007 and a piece of second reflector 012, and the angle between the second reflector 012 and the display chip is 45°. By reasonably selecting common components, the mold opening cost and the mass production cost can be reduced.

[0052] Taking the first optical module as an example, the light emitted by the first light source 001 is converged by the first light bucket 003, and then outputs parallel light through the first Fresnel lens 005. The light passes through the heat-insulating glass 007 and is projected onto the first display chip 008 to generate an image. The light after the image is generated is irradiated onto the Fresnel imaging lens for collimation and projected onto the second reflector 012 for reflection. The light reflected from the second reflector 012 is projected into the first projection lens 013. The light propagation path of the second optical module is similar to that of the first optical module, and will not be described in detail here.

[0053] Figure 2 is a top view of the projection system of the first embodiment, Figure 3 It is a left view of the projection system of the first embodiment. The projection system of the first embodiment has a length A*width B*height C=202mm*146mm*139mm. It can be seen that the size of the projection system of this embodiment meets the requirements of miniaturization. The corresponding optical elements of the first optical module and the second optical module have the same structure, which can reduce production costs and facilitate manufacturing.

[0054] Embodiment 2

[0055] like Figures 4 to 6 As shown, the projection system of the second embodiment is described.

[0056] The difference between this embodiment and the first embodiment is that the specific structure of the lighting assembly is different. Specifically, the focusing structure is different. In this embodiment, the focusing structure is a focusing lens group.

[0057] like Figure 4 As shown, in this embodiment, there are two condensing lens groups, namely a first condensing lens group and a second condensing lens group, and the two condensing lens groups respectively include a plurality of plano-convex lenses, the surface of the plano-convex lens facing the light source is a plane, and the surface of the plano-convex lens away from the light source is a convex surface. Specifically, the first condensing lens group is located at the light-emitting side of the first light source 001, and the first condensing lens group includes a first plano-convex lens 015 and a second plano-convex lens 016 in sequence along the direction away from the first light source 001. The second condensing lens group is located at the light-emitting side of the second light source 002, and the second condensing lens group includes a third plano-convex lens 017 and a fourth plano-convex lens 018 in sequence along the direction away from the second light source 002.

[0058] Optionally, a first reflector 019 is selectively provided between the condensing lens group and the collimating structure. The first reflector 019 is a reflector. The first reflector 019 may or may not be provided, and may be selected according to actual needs. Figure 4 When the first reflector 019 is provided, the angle between the first reflector 019 and the collimating structure is 45°.

[0059] Figure 5is a top view of the projection system of the second embodiment, Figure 6 It is a left side view of the projection system of the second embodiment. The projection system of the second embodiment has a length D*width E*height F=211 mm*149 mm*137 mm, and it can be seen that the size of the projection system of this embodiment meets the miniaturization requirement.

[0060] Embodiment 3

[0061] like Figure 7 As shown, the projection system of the third embodiment is described.

[0062] The difference between this embodiment and the first embodiment is that a heat dissipation component is added.

[0063] Specifically, the projection system of this embodiment further includes a light source heat dissipation pipe 020, an external circulation heat dissipation assembly, an internal circulation heat dissipation assembly 023, heat dissipation fins 022, a circuit driving assembly 027 and a speaker 028. The light source heat dissipation pipe 020 is formed by arranging hollow copper tubes, and is filled with heat dissipation liquid inside. It is located on the side of the light source away from the lighting assembly, and each light source has a corresponding light source heat dissipation pipe 020. The external circulation heat dissipation assembly and the internal circulation heat dissipation assembly 023 are respectively located on a set of two opposite side parts of the lighting assembly. The external circulation heat dissipation assembly includes two fans 021 arranged side by side and two heat dissipation fins 022 arranged side by side. The two fans 021 correspond to the two heat dissipation fins 022 one by one, and the heat dissipation fins 022 are located on the side of the fan 021 away from the lighting assembly. The internal circulation heat dissipation assembly 023 includes two fans 021 arranged side by side. The circuit driving assembly 027 is located between the display chip and the projection lens, specifically on the backlight side of the second reflector 012. The speaker 028 is located on the side of the projection lens close to the light source, specifically between the heat dissipation fins 022 and the projection lens.

[0064] Specifically, the projection system of this embodiment further includes an inner circulation heat sink 026, a first inner circulation guide plate 024 and a second inner circulation guide plate 025. The inner circulation heat sink 026 is a cast aluminum heat sink, located on the side of the inner circulation heat dissipation component 023 away from the lighting component, and the part of the inner circulation heat sink 026 away from the light source is arc-shaped to fit the lighting component; the first inner circulation guide plate 024 is arc-shaped, and the first inner circulation guide plate 024 with an arc shape is located on the side of the inner circulation heat dissipation component 023 away from the light source and between the inner circulation heat sink 026 and the display chip; the second inner circulation guide plate 025 is located between the display chip and the speaker 028 and is on the same horizontal plane as the display chip, and the second inner circulation guide plate 025 is a cast aluminum heat sink. The two projection lenses are respectively equipped with a set of focus drive motors 029 to adjust the focus of the projection lens and perform zoom focus, so that the projection lens can accurately align with the projection screen to ensure clear imaging.

[0065] The heat dissipation components are arranged in the projection system to ensure that the heat generated by the projection system during operation is dissipated in time, thereby preventing the performance degradation or damage of the optical elements of the projection system due to excessive temperature, and ensuring that the projection system can operate stably.

[0066] In summary, the projection system of the present application can realize four display modes, and the four display modes include a first display mode, a second display mode, a third display mode and a fourth display mode.

[0067] First display mode: Displaying the same signal image, the images projected by the first display chip 008 and the second display chip 009 do not completely occupy the effective imaging area, but are scaled in the effective imaging area, and trapezoidal correction or automatic obstacle avoidance processing is performed through relevant software and algorithms, ultimately ensuring that the image quality of the overlapping area of ​​the image projected by the first display chip 008 and the image projected by the second display chip 009 is the best. In this display mode, the projection size is 78 inches, the projection ratio is 1.3, the eccentricity rate is: 11%, the geometric efficiency is: 74.1%, the nine-point lighting is 65.6%, and the brightness is 700Lm.

[0068] Second display mode: only the first display chip 008 or only the second display chip 009 works, and the other display chip does not work. This display mode is suitable for users who think the brightness is high or who have energy-saving needs. At this time, the first display chip 008 or the second display chip 009 can be selected to work. In this case, the heat dissipation capacity of the projection system is redundant, and the optical components can be better cooled, thereby extending the life of the projection system. In this display mode, the projection size is 80 inches, the projection ratio is 1.2, the eccentricity rate is: 0%, the geometric efficiency is: 76.4%, the nine points are lit at 62.9%, and the brightness is 400Lm.

[0069] The third display mode: the light projected by the first display chip 008 and the second display chip 009 are both linearly polarized and orthogonal to each other. The first display chip 008 and the second display chip 009 display pictures of different signals. The overlapping area of ​​the picture projected by the first display chip 008 and the picture projected by the second display chip 009 is the viewing area. Customized 3D glasses are suitable for the left and right eye polarization directions to be orthogonal. When the user wears 3D glasses, the left and right eyes receive the light projected by the first display chip 008 and the second display chip 009 respectively, and 3D display can be achieved. 3D glasses are passive devices and do not need to sacrifice the refresh rate, so wearing them for a long time will not cause fatigue to the user. At this time, the imaging surface of the projection system needs to use a weakly depolarized screen to ensure that the polarization direction of the light is less changed after the light is projected onto the imaging surface and reflected. In this display mode, the projection size is 78 inches, the projection ratio is 1.3, the eccentricity is: 11%, the geometric efficiency is: 74.1%, the nine points are all lit at 65.6%, and the brightness is 350Lm.

[0070] Fourth display mode: the light beams projected by the first display chip 008 and the second display chip 009 are both linearly polarized and orthogonal to each other. The first display chip 008 and the second display chip 009 display images of different signals. The overlapping area of ​​the image projected by the first display chip 008 and the image projected by the second display chip 009 is the viewing area. The first user wears 3D glasses with the same polarization direction for the left and right eyes and the same polarization direction as the light beam projected by the first display chip 008, and the second user wears 3D glasses with the same polarization direction for the left and right eyes and the same polarization direction as the light beam projected by the second display chip 009, so that the first user and the second user can watch different images on the same imaging plane. The first user and the second user can be equipped with their own independent headphones, so that the first user and the second user can enjoy different images. In this display mode, the projection size is 78 inches, the projection ratio is 1.3, the eccentricity is: 11%, the geometric efficiency is: 74.1%, the nine points are all lit at 65.6%, and the brightness is 350Lm.

[0071] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0072] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0073] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0074] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A projection system, characterized in that: include: A light source, wherein there are multiple light sources, and the light emitting directions of the multiple light sources are the same; A lighting assembly, the lighting assembly being located at the light emitting side of the light source; A display chip, wherein there are a plurality of display chips, and the plurality of display chips correspond one-to-one to the plurality of light sources and are located on a side of the lighting component away from the light sources; A projection lens, wherein there are multiple projection lenses, each of which corresponds to one of the multiple display chips and is located on a side of the display chip away from the lighting component. The projection lens and the corresponding display chip are vertically arranged, the display chip is rectangular, and the optical axis of the projection lens is perpendicular to the long side of the corresponding display chip.

2. The projection system according to claim 1, characterized in that: There are two light sources, which are located on the same horizontal plane. The number of the display chips and the projection lenses is the same as the number of the light sources, and the two light sources emit light selectively.

3. The projection system according to claim 1, characterized in that: The lighting assembly includes a focusing structure and a collimating structure in sequence along a direction away from the light source. There are multiple focusing structures, and the multiple focusing structures are arranged in a one-to-one correspondence with the multiple light sources. There are one or more collimating structures.

4. The projection system according to claim 3, characterized in that: The focusing structure is a light bucket, the cross-sectional area of ​​which gradually decreases in the direction away from the light source; or the focusing structure is a focusing lens group, the focusing lens group includes a plurality of plano-convex lenses, and a first reflector (019) is selectively arranged between the focusing lens group and the collimating structure.

5. The projection system according to claim 3, characterized in that: The collimating structure is a Fresnel lens. When there is one collimating structure, one collimating structure has multiple collimating areas, and the multiple collimating areas correspond one-to-one to the multiple focusing structures. When there are multiple collimating structures, the multiple collimating structures are arranged at intervals, and the multiple collimating structures correspond one-to-one to the multiple focusing structures.

6. The projection system according to claim 1, characterized in that: The projection system further includes a Fresnel imaging lens, which is located between the display chip and the projection lens. The Fresnel imaging lens is one or more. When there is one Fresnel imaging lens, the Fresnel imaging lens has a plurality of imaging areas, and the plurality of imaging areas correspond one-to-one to the plurality of display chips; When there are multiple Fresnel imaging lenses, the multiple Fresnel imaging lenses are arranged at intervals and the multiple Fresnel imaging lenses correspond one-to-one to the multiple display chips.

7. The projection system according to claim 1, characterized in that: The projection system further comprises a second reflector (012), the second reflector (012) being located between the display chip and the projection lens, and being used for reflecting the image light of the display chip to the projection lens, and a plurality of the projection lenses share one second reflector (012); and / or the projection system further comprises a heat-insulating glass (007), the heat-insulating glass (007) being located between the lighting assembly and the display chip, and a plurality of the light sources share one piece of the heat-insulating glass (007).

8. The projection system according to any one of claims 1 to 7, characterized in that: The projection system further comprises a light source heat dissipation pipe (020), an external circulation heat dissipation component, an internal circulation heat dissipation component (023), a circuit driving component (027) and a speaker (028); the light source heat dissipation pipe (020) is located on a side of the light source away from the lighting component; the external circulation heat dissipation component and the internal circulation heat dissipation component (023) are respectively located on two opposite sides of the lighting component; the circuit driving component (027) is located between the display chip and the projection lens; and the speaker (028) is located on a side of the projection lens close to the light source.

9. The projection system according to claim 8, characterized in that: The projection system further comprises an internal circulation heat sink (026), a first internal circulation guide plate (024) and a second internal circulation guide plate (025); the internal circulation heat sink (026) is located on a side of the internal circulation heat dissipation component (023) away from the lighting component, and a portion of the internal circulation heat sink (026) away from the light source is arc-shaped; the first internal circulation guide plate (024) is arc-shaped; the first internal circulation guide plate (024) is arc-shaped and is located on a side of the internal circulation heat dissipation component (023) away from the light source and between the internal circulation heat sink (026) and the display chip; and the second internal circulation guide plate (025) is located between the display chip and the speaker (028).

10. The projection system according to any one of claims 1 to 7, characterized in that: The length of the projection system is less than 220 mm, the width of the projection system is less than 150 mm, and the height of the projection system is less than 142 mm.

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