Color light combining machine and assembling method thereof

Abstract

The invention discloses a color light combining machine and an assembling method thereof. The color-combining light machine comprises a support, a color-combining prism and at least one projection assembly. The support comprises a containing space and at least one opening, the color combination prism is installed in the containing space, the projection assemblies and the openings are installed in a one-to-one correspondence mode, and the projection paths of the at least one projection assembly are converged to the color combination prism for projection. The support further comprises an open window, the open window and the opening are located on different sides of the support, and the open window is used for enabling ultraviolet rays to irradiate into the support. Therefore, the window is arranged on the side of the bracket, and the ultraviolet light can accurately cover the gluing glue layers of all the projection assemblies by utilizing the ultraviolet light transmission and the optical guiding effect of the color combination prism, so that the pre-curing conversion rate is improved. After the glue is fully cured, the bonding strength is improved, the stability of the relative position of the projection assembly and the color combination prism is improved, the light convergence precision error is reduced, the color uniformity of a projection picture of the color combination light machine is improved, and the fusion effect is remarkably optimized.

Description

Technical Field

[0001] This application belongs to the field of optomechanical research and development technology, and in particular relates to a color combining optomechanism and its assembly method. Background Technology

[0002] With the development of electronic technology, technologies such as Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR) have gained popularity among consumers. In particular, the gradual maturation of existing Micro LED chip research and mass production technologies has made Micro LED-based optical engines a global hot topic in the AR field, and the number of AR optical engine-equipped devices has increased significantly. Furthermore, monochromatic optical engines can no longer meet user needs. To improve the imaging quality of optical engines, color-combining optical engines have become the mainstream development direction. Color-combining optical engines typically use three single-color Micro LED packages to fuse three colors of light together. The three Micro LED packages are located on three different faces of the same ring of a cubic prism. The fourth face of this ring is the light-emitting port of the three Micro LEDs. When all three light sources are lit, the prism allows the combined three-color image to be obtained at the light-emitting port, achieving a color effect. However, during the assembly process, insufficient precision and accuracy often lead to poor imaging quality in the terminal device. Summary of the Invention

[0003] This application aims to at least partially solve the technical problems of large space occupation and insufficient assembly precision and accuracy of color combining optical machines. To this end, this application provides a color combining optical machine and its assembly method.

[0004] In a first aspect, an embodiment of this application provides a color-combining optical machine, comprising: a bracket including a receiving space and at least one opening; a color-combining prism installed in the receiving space; at least one projection component installed corresponding to each opening, the projection path of at least one projection component converging to the color-combining prism and projecting; the bracket further comprising a window located on a different side of the bracket from the opening, the window being used to allow ultraviolet light to irradiate into the interior of the bracket.

[0005] Therefore, by setting a window on the side of the bracket and utilizing the ultraviolet transmittance and optical guiding effect of the color-combining prism, ultraviolet light can accurately cover the adhesive layer of all projection components, improving the pre-curing conversion rate. After the adhesive is fully cured, the bonding strength is improved, the relative positional stability of the projection components and the color-combining prism is enhanced, the light focusing accuracy error is reduced, the color uniformity of the image projected by the color-combining optical engine is improved, and the fusion effect is significantly optimized.

[0006] In one possible implementation, the projection assembly includes a first projection assembly, a second projection assembly, and a third projection assembly. The at least one opening includes a first opening, a second opening, and a third opening. The first projection assembly corresponds to the first opening, the second projection assembly corresponds to the second opening, and the third projection assembly corresponds to the third opening. The first projection assembly includes a first circuit board, the second projection assembly includes a second circuit board, and the third projection assembly includes a third circuit board. The first circuit board, the second circuit board, and the third circuit board are electrically connected. This improves the positioning accuracy and assembly efficiency of the color combining optical engine.

[0007] In one possible implementation, the first, second, and third circuit boards are electrically connected via anisotropic conductive films, which include a first and a second anisotropic conductive film. The first and second circuit boards are electrically connected to the first anisotropic conductive film via a thermo-pressing process, and the second and third circuit boards are electrically connected to the second anisotropic conductive film via a thermo-pressing process. Thus, by replacing traditional mechanical connections with anisotropic conductive films and combining this with a compact assembly structure, miniaturization and reliability are achieved. The anisotropic conductive films are thin and require no additional installation gaps; they are directly bonded via the circuit board mating sections, significantly reducing the space occupied by a single connection structure compared to traditional solutions. This reduces the overall size of the color-combining optical engine compared to traditional mechanical connection solutions, making it more suitable for the limited installation space of terminal equipment. Secondly, the connection structure formed after the anisotropic conductive film is cured has both mechanical fixing and electrical conduction functions, eliminating the need for additional welding or fasteners. This improves assembly efficiency and enhances the vibration resistance of the connection structure, ensuring that the color matching machine maintains stable performance in the daily use of terminal equipment.

[0008] In one possible implementation, the first circuit board, the first anisotropic conductive film, the second circuit board, the second anisotropic conductive film, and the third circuit board are all disposed on the side of the support without an opening and stacked sequentially along a first direction. The first anisotropic conductive film and the second anisotropic conductive film form a conductive path along the first direction, and the first anisotropic conductive film and the second anisotropic conductive film remain insulated along a plane perpendicular to the first direction. Thus, through the directional conductive characteristics of the anisotropic conductive film and the parallel arrangement structure, the spatial layout is further optimized and the connection reliability is improved while ensuring electrical performance. The anisotropic conductive film arranged parallel to the first direction allows the connection structure of the three circuit boards to be arranged in a straight line, eliminating the need for additional bends or clearances. Compared to the lateral space occupied by traditional mechanical connectors, the space occupied by the connection structure in this solution is reduced. The ultra-thin thickness of the anisotropic conductive film and the tight fit design with the circuit board avoid redundant space required for connector male and female fastening, making the arrangement of the three projection components more compact and further contributing to the miniaturization of the color combining optical engine. Secondly, the anisotropic properties of the anisotropic conductive film enable reliable connections, effectively avoiding the risk of short circuits between adjacent lines and improving the electrical stability of the color combining optical engine. Furthermore, the parallel arrangement of the anisotropic conductive films ensures more uniform stress distribution across the three circuit boards, reducing circuit board deformation caused by assembly stress, ensuring the accuracy of light path projection, and thus improving the display quality of the color combining optical engine.

[0009] In one possible implementation, the first projection component includes a first light-emitting unit electrically connected to the first circuit board; the second projection component includes a second light-emitting unit electrically connected to the second circuit board; and the third projection component includes a third light-emitting unit electrically connected to the third circuit board. The light-emitting colors of the first, second, and third light-emitting units are any one of red, green, and blue, and are not the same. Therefore, by adjusting the voltage and current of the light-emitting units via the circuit board, their light-emitting color and brightness can be controlled. By combining different light-emitting units, full-color display can be achieved, providing rich color representation. The independent control capability of each light-emitting unit allows for precise color adjustment, achieving high color saturation and realistic image effects. The flexible combination of different light-emitting units can meet various complex application scenarios, such as high-resolution display and dynamic image display.

[0010] In one possible implementation, the first, second, and third light-emitting units are chips formed from miniature light-emitting diodes (LEDs). This reduces the size of the miniature LED chip compared to a traditional LED chip, significantly decreasing the array size of the light-emitting units and consequently reducing the overall size of the projection assembly, thus supporting the miniaturization of the color-combining optical engine. Furthermore, the high luminous efficiency of the miniature LEDs ensures that the color-combining optical engine can still output sufficient brightness within a small size.

[0011] In one possible implementation, the first projection component includes a light-transmitting cover plate disposed on the side of the first light-emitting unit facing the color-combining prism. Thus, by adding a light-transmitting cover plate, it helps to prevent dust, moisture, and other contaminants from contacting the light-emitting unit, avoiding a decrease in luminous efficiency or display defects caused by contamination of the light-emitting surface. Simultaneously, it protects the micro-LED chip from damage by external impacts, improving the environmental adaptability and service life of the color-combining optical engine.

[0012] In one possible implementation, the color-combining optical engine includes a lens, the bracket includes a fourth opening, the lens is mounted corresponding to the fourth opening, and the projection paths of the first projection component, the second projection component, and the third projection component converge to the color-combining prism and project onto the lens. Thus, the integrated assembly design of the lens and bracket ensures precise light path transmission, improves image quality, while the sealed structure enhances reliability, and the compact layout maintains the advantages of miniaturization.

[0013] Secondly, embodiments of this application also provide a method for assembling a color combining optical engine, comprising the following steps: S1. Assemble the color-combining prism and the bracket into a first semi-finished product; S2. Position the first projection component with a laser and charge-coupled device and assemble it with the first semi-finished product into a second semi-finished product; S3. Assemble the lens and the second semi-finished product into a third semi-finished product through automatic correction; S4. Assemble the second projection component and the third semi-finished product into a fourth semi-finished product through automatic correction, and use a calibration component to calibrate the center offset and rotation offset of the second projection component relative to the third semi-finished product; S5. Assemble the third projection component and the fourth semi-finished product through automatic correction, and use the calibration component to calibrate the center offset and rotation offset of the third projection component relative to the fourth semi-finished product.

[0014] In one possible implementation, the calibration component includes a first chart and a second chart; in steps S4 and S5, the first projection component is lit up to project a first reference portion and a second reference portion onto the first chart, and then the second projection component or the third projection component is lit up to project a first calibration portion and a second calibration portion onto the second chart. During automatic correction assembly, the first calibration portion is aligned with the first reference portion, and then the second calibration portion is aligned with the second reference portion.

[0015] In one possible implementation, the first image card and the second image card are the same image card.

[0016] Therefore, this assembly method can effectively improve assembly accuracy and precision, and realize the miniaturization of the color combining optical machine, thereby improving the imaging quality of the terminal equipment. Attached Figure Description

[0017] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a color combining light machine provided in an embodiment of this application; Figure 2 yes Figure 1 Exploded view; Figure 3 This is a schematic diagram of the structure of a bracket provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a color combining optical engine containing an anisotropic conductive film provided in an embodiment of this application; Figure 5 This is an assembly flowchart of a color combining light machine provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a first drawing card and a second drawing card provided in an embodiment of this application.

[0019] Figure label: Color combining light machine-1; bracket 10; opening-101; accommodating space-110; first opening-120; second opening-130; third opening-140; fourth opening-150; window-160; color combining prism-20; projection assembly-301; first projection assembly-30; first circuit board-310; first light-emitting unit-320; first light-transmitting cover-330; second projection assembly-40; second circuit board-410; second light-emitting unit-420; second light-transmitting cover-430; third Projection assembly - 50; Third circuit board - 510; Third light-emitting unit - 520; Third light-transmitting cover plate - 530; First anisotropic conductive film - 60; Second anisotropic conductive film - 70; Lens - 80; First semi-finished product - 901; Second semi-finished product - 902; Third semi-finished product - 903; Fourth semi-finished product - 904; First diagram card - 905; First reference unit - 9051; Second reference unit - 9052; Second diagram card - 906; First calibration unit - 9061; Second calibration unit - 9062. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications in the embodiments of this invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction relationship between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. In addition, the descriptions involving "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] In related technologies, color combining optical engines often suffer from poor imaging quality in terminal devices due to insufficient precision and accuracy during assembly. Furthermore, these engines occupy a large space, making them unsuitable for use in terminal devices. This application provides a color combining optical engine that can at least partially achieve miniaturization and improve imaging quality.

[0023] This application is described below with reference to the accompanying drawings and specific embodiments: Please see Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of a color combining light machine provided in an embodiment of this application. Figure 2 yes Figure 1 Explosion diagram, Figure 3This is a schematic diagram of the structure of a support provided in an embodiment of this application. This application provides a color-combining light machine 1. The color-combining light machine 1 includes a support 10, a color-combining prism 20, and at least one projection component 301. The support 10 includes a receiving space 110 and at least one opening 101. The color-combining prism 20 is installed within the receiving space 110. The projection components 301 are installed one-to-one with the openings 101, and the projection paths of at least one projection component 301 converge to the center of the color-combining prism 20 and project. The support 10 also includes a window 160, which is located on a different side of the support 10 from the opening 101, and the window 160 is used to allow ultraviolet light to enter the interior of the support 10.

[0024] Specifically, the projection component 301 and the bracket 10 are installed by adhesive bonding. During the assembly process, after the color-matching prism 20 and the projection component 301 are initially fixed through automatic correction and assembly alignment, the ultraviolet light source is turned on. The ultraviolet light enters from the window 160 and shines on the color-matching prism 20. It is guided to the incident surface through its internal reflective surface and finally evenly shines on the curing adhesive at the bonding point of the projection component 301, thus achieving pre-curing of the adhesive.

[0025] In some possible embodiments, the color combining machine 1 includes a cover plate whose shape and size match the opening 160. This achieves a sealed, dustproof design for the color combining machine 1 and further enhances the overall rigidity of the support 10.

[0026] In traditional structures, after the last encapsulation unit is automatically calibrated and assembled, ultraviolet light cannot reach the adhesive, preventing it from fully pre-curing and affecting the final optomechanical fusion effect. The adhesive is also prone to shrinkage and deformation later, causing light path deviation and resulting in color shift, ghosting, and other problems. However, this embodiment addresses this by setting a window 160 on the side of the bracket 10, utilizing the ultraviolet transmittance and optical guiding effect of the color-combining prism 20 to ensure that ultraviolet light accurately illuminates the adhesive layer of all projection components 301, improving the pre-curing conversion rate. After the adhesive is fully cured, the bonding strength is improved, the relative positional stability of the projection components 301 and the color-combining prism 20 is enhanced, the light focusing accuracy error is reduced, the color uniformity of the projected image from the color-combining optomechanical 1 is improved, and the fusion effect is significantly optimized.

[0027] In some possible embodiments, the support 10 is integrally injection molded.

[0028] Please see Figure 2 In this embodiment of the application, the projection component 301 includes a first projection component 30, a second projection component 40, and a third projection component 50. At least one opening includes a first opening 120, a second opening 130, and a third opening 140. The first projection component 30 is installed correspondingly to the first opening 120, the second projection component 40 is installed correspondingly to the second opening 130, and the third projection component 50 is installed correspondingly to the third opening 140.

[0029] In some possible embodiments, the bracket 10 is integrally injection molded, with an overall cuboid structure. The size of the internal accommodating space 110 should match the external dimensions of the color-combining prism 20 to ensure that the color-combining prism 20 is tightly embedded without loosening. The bracket has a first opening 120, a second opening 130, and a third opening 140 on its three sides, with the same dimensions for all three openings. A positioning step is provided around the edge of each of the first opening 120, second opening 130, and third opening 140, with anti-slip texture on the inner side of the step. The first projection component 30, second projection component 40, and third projection component 50 project three colors of light respectively. All three have identical structures, including a circuit board, a light-emitting unit, electronic components, and a molding compound. The molding compound encapsulates the circuit board, light-emitting unit, and electronic components, and is fixed to the bracket 10. After installation, the light-emitting surface of the projection component 301 is parallel to the incident surface of the color-combining prism 20.

[0030] This will help improve the positioning accuracy and assembly efficiency of the color combining optical machine 1.

[0031] Please see Figure 2 and Figure 4 , Figure 4 This is a schematic diagram of a color combining optical engine containing an anisotropic conductive film, provided in an embodiment of this application. In this embodiment, the first projection component 30 includes a first circuit board 310, the second projection component 40 includes a second circuit board 410, and the third projection component 50 includes a third circuit board 510. The first circuit board 310, the second circuit board 410, and the third circuit board 510 are electrically connected, and at least two of the first circuit board 310, the second circuit board 410, and the third circuit board 510 are electrically connected through anisotropic conductive films.

[0032] In some possible embodiments, the first circuit board 310, the second circuit board 410 and the third circuit board 510 are flexible circuit boards, with a mating portion extending from one end near the adjacent projection assembly, and the surface of the mating portion is plated with conductive contacts.

[0033] In some possible embodiments, the first circuit board 310, the second circuit board 410, and the third circuit board 510 are electrically connected via anisotropic conductive films. The anisotropic conductive films include a first anisotropic conductive film 60 and a second anisotropic conductive film 70. The first circuit board 310 and the second circuit board 410 are electrically connected to the first anisotropic conductive film 60 via a thermo-pressing process, and the second circuit board 410 and the third circuit board 510 are electrically connected to the second anisotropic conductive film 70 via a thermo-pressing process. The first anisotropic conductive film 60 is bonded between the conductive contacts at the mating portion of the first circuit board 310 and the second circuit board 410, with the bonding area completely covering the contact area and its edges aligned with the edges of the mating portion. The second anisotropic conductive film 70 is bonded between the mating portion of the second circuit board 410 and the third circuit board 510 in the same manner. During installation, the three projection components are first inserted into the openings of the bracket 10, and the initial positioning is achieved by using the positioning steps to ensure that the projection paths of the three components all point to the center of the color-matching prism 20. Then, the anisotropic conductive film is cured by hot pressing to achieve electrical connection between the circuit boards. After hot pressing, the anisotropic conductive film and the circuit board docking part form an integral structure with no extra protruding space.

[0034] It is understandable that the circuit boards of the three projection components can be electrically connected in pairs via anisotropic conductive films. For example, the first circuit board 310 and the third circuit board 510 are electrically connected via a first anisotropic conductive film 60, and the first circuit board 310 and the second circuit board 410 are electrically connected via a second anisotropic conductive film 70.

[0035] It is understandable that the three projection components can be connected on a hot press using an anisotropic conductive film, and then combined with the support 10, color-combining prism 20, etc. to form a color-combining optical engine 1.

[0036] Therefore, by replacing traditional mechanical connections with anisotropic conductive films and combining them with a compact assembly structure, a balance between miniaturization and reliability is achieved. The anisotropic conductive film is thin and requires no additional installation gaps; it is directly bonded via the circuit board mating section, significantly reducing the space occupied by a single connection structure compared to traditional solutions. This reduces the overall size of the color-matching optical engine 1 compared to traditional mechanical connection schemes, making it more suitable for the limited installation space of terminal equipment. Furthermore, the connection structure formed after the anisotropic conductive film cures combines mechanical fixing and electrical conduction functions, eliminating the need for additional welding or fasteners. This improves assembly efficiency while enhancing the vibration resistance of the connection structure, ensuring stable performance of the color-matching optical engine 1 during daily use of the terminal equipment.

[0037] Please see Figure 2 and Figure 4In this embodiment, the first circuit board 310, the first anisotropic conductive film 60, the second circuit board 420, the second anisotropic conductive film 70, and the third circuit board 510 are all disposed on the side of the support 10 without an opening and are stacked sequentially along the first direction Z axis. The first anisotropic conductive film 60 and the second anisotropic conductive film 70 form a conductive path along the first direction Z, and the first anisotropic conductive film 60 and the second anisotropic conductive film 70 remain insulated along a plane perpendicular to the first direction Z.

[0038] Schematic, the first direction Z is defined as the direction perpendicular to the mating surface of the circuit board. The first anisotropic conductive film 60 and the second anisotropic conductive film 70 are arranged opposite each other along the Z-axis, and their central axes are parallel to the central axis of the optical axis of the color-combining prism. The first anisotropic conductive film 60 and the second anisotropic conductive film 70 ensure insulation in the XY direction, i.e., on a plane parallel to the mating surface of the circuit board.

[0039] In some possible embodiments 7, the mating surfaces of the first circuit board 310 and the second circuit board 410 may be roughened to enhance the adhesion between the anisotropic conductive film and the circuit board.

[0040] Therefore, by leveraging the directional conductivity of the anisotropic conductive film and its parallel arrangement, the spatial layout is further optimized and connection reliability is improved while ensuring electrical performance. The anisotropic conductive film, positioned opposite each other along the first Z-direction, allows the connection structure of the three circuit boards to be arranged in a straight line, eliminating the need for additional bends or clearances. Compared to the lateral space occupied by traditional mechanical connectors, the space occupied by this solution is reduced. The ultra-thin thickness of the anisotropic conductive film and its tight fit with the circuit boards avoid redundant space required for connector male-female fastening, making the arrangement of the three projection components more compact and further contributing to the miniaturization of the color combining optical engine 1. Secondly, the anisotropic properties of the anisotropic conductive film—conductive in the Z-direction and insulating in the XY-direction—ensure reliable connection, effectively avoiding the risk of short circuits between adjacent lines and improving the electrical stability of the color combining optical engine 1. Furthermore, the parallel arrangement of the anisotropic conductive film makes the stress on the three circuit boards more uniform, reducing circuit board deformation caused by assembly stress, ensuring the accuracy of light projection, and thus improving the display quality of the color combining optical engine 1.

[0041] Please see Figure 2In this embodiment, the first projection component 30 includes a first light-emitting unit 320, which is electrically connected to the first circuit board 310; the second projection component 40 includes a second light-emitting unit 420, which is electrically connected to the second circuit board 410; the third projection component 50 includes a third light-emitting unit 520, which is electrically connected to the third circuit board 510; the light-emitting colors of the first light-emitting unit 320, the second light-emitting unit 420, and the third light-emitting unit 520 are any one of red, green, and blue, and are not the same.

[0042] Therefore, by adjusting the voltage and current of the light-emitting unit on the circuit board, its color and brightness can be controlled. By combining different light-emitting units, full-color display can be achieved, providing rich color representation. The independent control capability of each light-emitting unit allows for precise color adjustment, achieving high color saturation and realistic image effects. The flexible combination of different light-emitting units can meet various complex application scenarios, such as high-resolution displays and dynamic image displays.

[0043] Please see Figure 2 In this embodiment, the first light-emitting unit 320, the second light-emitting unit 420, and the third light-emitting unit 520 are all chips formed from miniature light-emitting diodes.

[0044] Therefore, the miniature light-emitting diode chip is smaller in size than the traditional LED chip, which greatly reduces the array size of the light-emitting unit, thereby reducing the overall size of the projection component and supporting the miniaturization of the color combining optical engine 1. Secondly, the high luminous efficiency of the miniature light-emitting diode ensures that the color combining optical engine 1 can still output sufficient brightness in a small size.

[0045] Please see Figure 2 In this embodiment of the application, the first projection component 30 includes a first light-transmitting cover plate 330, which is disposed on the side of the first light-emitting unit 320 facing the color-combining prism 20.

[0046] It is understood that the second projection assembly 40 includes a second light-transmitting cover plate 430, which is disposed on the side of the second light-emitting unit 420 facing the color-combining prism 20. The third projection assembly 50 includes a third light-transmitting cover plate 530, which is disposed on the side of the third light-emitting unit 520 facing the color-combining prism 20.

[0047] In some possible embodiments, the light-transmitting cover is made of quartz glass.

[0048] Therefore, by adding a light-transmitting cover plate, it is beneficial to block dust, water vapor and other pollutants from contacting the light-emitting unit, avoid the decrease in light efficiency or display defects caused by pollution of the light-emitting surface, and protect the micro light-emitting diode chip from damage by external impact, thereby improving the environmental adaptability and service life of the color combining optical engine 1.

[0049] Please see Figure 2 In this embodiment of the application, the color combining optical engine 1 includes a lens 80, and the bracket 10 includes a fourth opening 150. The lens is installed correspondingly to the fourth opening 150. The projection paths of the first projection component 30, the second projection component 40 and the third projection component 50 converge to the color combining prism 20 and project onto the lens 80.

[0050] Schematic, the lens 80 and the color-combining prism 20 are positioned on the light-emitting paths of the first projection assembly 30, the second projection assembly 40, and the third projection assembly 50. The projection paths of the first projection assembly 30, the second projection assembly 40, and the third projection assembly 50 converge to the center of the color-combining prism 20 and are projected onto the lens 80. The color-combining prism 20 primarily alters the light path, while the lens 80 primarily diffuses the converged color-combined light. The fourth opening 150 is used to correspondingly position the lens 80.

[0051] In some possible embodiments, the lens 80 and the bracket 10 are fixed by means of snap-fit, screw connection and adhesive, etc., and the embodiments of this application do not specifically limit the method.

[0052] In some possible embodiments, lens 80 includes a lens barrel and a lens group. The lens group may include a collimating lens.

[0053] Therefore, the integrated assembly design of lens 80 and bracket 10 ensures accurate optical transmission and improves image quality, while the sealed structure enhances reliability and the compact layout maintains the advantage of miniaturization.

[0054] Please see Figure 2 In this embodiment, the fourth opening 150 and the first opening 120 are located on opposite sides of the bracket 10, and the second opening 130 and the third opening 140 are located on the other opposite sides of the bracket 10.

[0055] In some possible embodiments, the support 10 is a cube structure, and the accommodating space 110 is used to install the color-combining prism 20. The fourth opening 150 and the first opening 120 are respectively opened on opposite sides of the support 10; the second opening 130 and the third opening 140 are respectively opened on other opposite sides of the support 10; the centers of the four openings are all at the origin of the same spatial coordinate system as the center of the color-combining prism 20, forming a symmetrical layout.

[0056] In some possible embodiments, a first projection component 30, used to emit green light, is installed in a first opening 120, with its emitting surface parallel to the side of the support 10; a lens 80 is installed in a fourth opening 150, with the optical axis of the lens 80 passing through the center of the color-combining prism along the X-axis. A second projection component 40, used to emit red light, is installed in a second opening 130. A third projection component 50, used to emit blue light, is installed in a third opening 140, with the emitting surfaces of both components parallel to the side of the support 10, and the light emission paths projected along the Y-axis onto the corresponding incident surfaces of the color-combining prism 20.

[0057] In some possible embodiments, the circuit board mating portions of the three projection components are arranged along the XY plane, and the first anisotropic conductive film 60 and the second anisotropic conductive film 70 are arranged opposite each other along the Z direction, so as not to occupy the optical path space of the four openings and to ensure that the light projection is not disturbed.

[0058] Thus, the bracket 10 achieves orthogonal convergence of optical paths while ensuring structural stability, improving color matching accuracy, and maintaining the advantage of miniaturization with its compact layout.

[0059] Please see Figure 2 , Figure 5 and Figure 6 , Figure 5 This is an assembly flowchart of a color combining light machine provided in an embodiment of this application. Figure 6 This is a schematic diagram of the structure of a first drawing and a second drawing provided in an embodiment of this application. Based on the same inventive concept, an embodiment of this application also provides a method for assembling a color combining optical engine 1, which includes the following steps: S1. Assemble the color-combining prism 20 and the bracket 10 into the first semi-finished product 901; S2. Position the first projection component 30 with the first semi-finished product 901 using a laser and charge-coupled device to assemble it into the second semi-finished product 902; Specifically, laser and charge-coupled device (CCD) positioning is a high-precision positioning technology that combines the high directionality and high energy density of lasers with the photoelectric conversion and visual imaging advantages of CCDs. By acquiring visual information of the laser-affected area or the target under test through CCD, and combining coordinate calibration, image processing and motion control algorithms, it can achieve accurate identification and positioning of the target's position, angle and contour, with positioning accuracy reaching the micrometer level.

[0060] S3. The lens 80 and the second semi-finished product 902 are automatically aligned and assembled into the third semi-finished product 903; S4. Automatically calibrate and assemble the second projection component 40 and the third semi-finished product 903 into the fourth semi-finished product 904, and use a calibration piece to calibrate the center offset and rotation offset of the second projection component 40 relative to the third semi-finished product 903. S5. Automatically calibrate and assemble the third projection component 50 with the fourth semi-finished product 904, and use a calibrator to calibrate the center offset and rotation offset of the third projection component 50 relative to the fourth semi-finished product 904.

[0061] In some possible embodiments, the calibration component includes a first chart 905 and a second chart 906. In steps S4 and S5, the first projection component 30 is illuminated to project a first reference portion 9051 and a second reference portion 9052 onto the first chart 905. Then, the second projection component 40 or the third projection component 50 is illuminated to project a first calibration portion 9061 and a second calibration portion 9062 onto the second chart 906. During automatic correction assembly, the first calibration portion 9061 is aligned with the first reference portion 9051, and then the second calibration portion 9062 is aligned with the second reference portion 9052.

[0062] In some possible embodiments, the first projection component 30, the second projection component 40, and the third projection component 50 are all fixed to the bracket 10 by adhesive bonding. When the second projection component 40 or the third projection component 50 is bonded to the bracket 10, ultraviolet light can be used to cure the bonding position of the second projection component 40 or the third projection component 50 in stages through the opening 160. It is understood that when curing the bonding position of the second projection component 40, ultraviolet light can also be irradiated through the third opening 140.

[0063] In some possible embodiments, the assembly order of the second projection assembly 40 and the third projection assembly 50 with the bracket 10 can be interchanged.

[0064] In some possible embodiments, the first reference part 9051 is circular and the first calibration part 9061 is annular. During correction, the second projection component 40 or the third projection component 50 is finely adjusted so that the center of the first calibration part 9061 coincides with the center of the first reference part 9051, thereby correcting the offset of the second projection component 40 relative to the third semi-finished product 903 or the third projection component 50 relative to the center of the fourth semi-finished product 904.

[0065] In some possible embodiments, the second reference part 9052 and the second calibration part 9062 are both composed of two circles. The correction can be performed by connecting the center points of the two circles. During correction, the second projection component 40 or the third projection component 50 is finely adjusted so that the line connecting the center points of the two circles of the second calibration part 9062 coincides with the line connecting the center points of the two circles of the second reference part 9052, so as to correct the rotational offset of the second projection component 40 relative to the third semi-finished product 903 or the third projection component 50 relative to the fourth semi-finished product 904.

[0066] In some possible embodiments, the first diagram 905 and the second diagram 906 are the same diagram. Illustratively, during calibration, the first projection component 30 is illuminated to project the first reference portion 9051 and the second reference portion 9052 onto the diagram. Then, the second projection component 40 or the third projection component 50 is illuminated to project the first calibration portion 9061 and the second calibration portion 9062 onto the same diagram. During automatic correction assembly, the first calibration portion 9061 is aligned with the first reference portion 9051, and then the second calibration portion 9062 is aligned with the second reference portion 9052.

[0067] In some possible embodiments, after step S5, the circuit boards of the first projection component 30, the second projection component 40, and the third projection component 50 can be made conductive using an anisotropic conductive film.

[0068] Therefore, this assembly method can effectively improve assembly accuracy and precision, and realize the miniaturization of the color combining optical engine 1, thereby improving the imaging quality of the terminal equipment.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0070] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0071] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A color combining light machine, characterized in that, include: A support, including a receiving space and at least one opening; A color-combining prism, wherein the color-combining prism is installed within the accommodating space; At least one projection component is installed in a one-to-one correspondence with the opening, and the projection paths of at least one projection component converge to the color combining prism and project. The bracket also includes a window, which is located on a different side of the bracket from the opening, and the window is used to allow ultraviolet light to enter the interior of the bracket.

2. The color combining machine according to claim 1, characterized in that, The projection assembly includes a first projection assembly, a second projection assembly, and a third projection assembly. The at least one opening includes a first opening, a second opening, and a third opening. The first projection assembly corresponds to the first opening, the second projection assembly corresponds to the second opening, and the third projection assembly corresponds to the third opening. The first projection assembly includes a first circuit board, the second projection assembly includes a second circuit board, and the third projection assembly includes a third circuit board. The first circuit board, the second circuit board, and the third circuit board are electrically connected.

3. The color combining machine according to claim 2, characterized in that, The first circuit board, the second circuit board, and the third circuit board are electrically connected through anisotropic conductive films. The anisotropic conductive films include a first anisotropic conductive film and a second anisotropic conductive film. The first circuit board and the second circuit board are electrically connected to the first anisotropic conductive film through a hot-pressing process, and the second circuit board and the third circuit board are electrically connected to the second anisotropic conductive film through a hot-pressing process.

4. The color combining machine according to claim 3, characterized in that, The first circuit board, the first anisotropic conductive film, the second circuit board, the second anisotropic conductive film, and the third circuit board are all disposed on the side of the bracket without an opening and are stacked sequentially along the first direction. The first anisotropic conductive film and the second anisotropic conductive film form a conductive path along the first direction, and the first anisotropic conductive film and the second anisotropic conductive film remain insulated along a plane perpendicular to the first direction.

5. The color combining machine according to claim 2, characterized in that, The first projection component includes a first light-emitting unit, which is electrically connected to the first circuit board; the second projection component includes a second light-emitting unit, which is electrically connected to the second circuit board; the third projection component includes a third light-emitting unit, which is electrically connected to the third circuit board; the light-emitting colors of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are any one of red, green, and blue, and are not the same.

6. The color combining machine according to claim 5, characterized in that, The first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are chips formed from miniature light-emitting diodes.

7. The color combining machine according to claim 5, characterized in that, The first projection component includes a light-transmitting cover plate, which is disposed on the side of the first light-emitting unit facing the color-combining prism.

8. The color combining machine according to any one of claims 2-7, characterized in that, The color combining optical engine includes a lens, the bracket includes a fourth opening, the lens is installed corresponding to the fourth opening, and the projection paths of the first projection component, the second projection component and the third projection component converge to the color combining prism and project onto the lens.

9. A method for assembling a color combining optical machine, used to assemble the color combining optical machine of claim 8, characterized in that, Includes the following steps: S1. Assemble the color-combining prism and the bracket into a first semi-finished product; S2. Position the first projection component with the first semi-finished product using a laser and charge-coupled device to assemble it into a second semi-finished product; S3. The lens and the second semi-finished product are automatically aligned and assembled into a third semi-finished product; S4. Automatically calibrate and assemble the second projection component and the third semi-finished product into a fourth semi-finished product, and use a calibration component to calibrate the center offset and rotation offset of the second projection component relative to the third semi-finished product; S5. Automatically calibrate and assemble the third projection component with the fourth semi-finished product, and use the calibration component to calibrate the center offset and rotation offset of the third projection component relative to the fourth semi-finished product.

10. The assembly method according to claim 9, characterized in that, The calibration component includes a first diagram and a second diagram; in steps S4 and S5, the first projection component is lit up to project a first reference part and a second reference part onto the first diagram, and then the second projection component or the third projection component is lit up to project a first calibration part and a second calibration part onto the second diagram. During automatic correction assembly, the first calibration part is aligned with the first reference part, and then the second calibration part is aligned with the second reference part.

11. The assembly method according to claim 10, characterized in that, The first picture card and the second picture card are the same picture card.

Images