Light combination device and micro projection light machine

Abstract

A light-combining device and a micro-projection optical engine are disclosed. The light-combining device includes: a light-combining prism for mixing light incident through multiple incident surfaces and exiting through an exit surface; the light-combining prism includes multiple sides, one of which serves as an exit surface, and multiple of the remaining sides serve as incident surfaces; a lens assembly for adjusting the light emitted from the light-combining prism; the exit surface of the light-combining prism is in direct contact with the lens assembly. By directly contacting the light-combining prism with the lens assembly, compared to the traditional structure where the light-combining prism is fitted into a mounting frame and then connected to the lens assembly via the mounting frame, the gap of one edge of the mounting frame between the light-combining prism and the lens assembly is eliminated, effectively reducing the overall length of the light-combining prism and the lens assembly. Since the micro-projection optical engine formed based on the light-combining device needs to be mounted perpendicular to the lens direction in the outer frame of eyeglasses, the reduction in length further facilitates the mounting of the micro-projection optical engine in the outer frame of eyeglasses.

Description

Technical Field

[0001] This utility model relates to the field of display, and in particular to a light combining device and a micro-projection optical engine. Background Technology

[0002] In recent years, Micro LED (Micro Light Emitting Diode Display) technology has developed rapidly, and its application in electronic devices has become increasingly widespread, greatly improving people's quality of life. Micro LED, or micro light-emitting diode display, is an advanced display technology with significant advantages such as high brightness, high contrast, and low power consumption, bringing a qualitative leap to the display effects of electronic devices.

[0003] In practical applications, Micro LED microdisplay panels are often assembled with optical components such as lenses to form optomechanical or light engine structures. With the increasing trend towards miniaturization of electronic devices, the need for miniaturization of optomechanical structures is becoming increasingly urgent. Especially in the field of wearable electronic devices, the miniaturization of micro-projection optomechanical systems has become a key challenge that urgently needs to be overcome.

[0004] Therefore, how to utilize the excellent performance of Micro LED optical engines while meeting the requirements for miniaturization is a key direction for current research and development of related technologies. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a light combining device and a micro-projection optical engine to meet the needs of modern electronic devices for miniaturization and portability.

[0006] To address the aforementioned problems, this utility model provides a light combining device, comprising: a light combining prism for mixing light rays incident through multiple incident surfaces and emitting them through an emitting surface, the light combining prism comprising multiple sides, one of which serves as an emitting surface and multiple of the remaining sides serving as incident surfaces; a lens assembly for adjusting the light rays emitted from the light combining prism; the emitting surface of the light combining prism is in direct contact with the lens assembly.

[0007] Optionally, the optical center of the light-combining prism lies on the optical central axis of the lens assembly.

[0008] Optionally, the light-emitting surface of the light-combining prism is connected to the lens assembly via an adhesive; the lens assembly includes a positioning frame at the rear end and a lens module, and the distance between the light-emitting surface of the light-combining prism and the lens in the lens module closest to the positioning frame is 0.30mm~0.40mm.

[0009] Accordingly, the present invention also provides a micro-projection optical engine, comprising: a panel assembly and a light combining device as described in any of the above technical solutions; the panel assembly is adapted to enclose the light combining device; the panel assembly includes a first micro-display panel, a second micro-display panel and a third micro-display panel, wherein the light emitting portions of the first micro-display panel, the second micro-display panel and the third micro-display panel respectively cooperate with the three light incident surfaces of the light combining prism.

[0010] Optionally, the length of the micro-projection optical engine is equivalent to the sum of the longitudinal dimension of the light-emitting portion of the first micro-display panel and the optical axis dimension of the lens assembly.

[0011] Optionally, the first microdisplay panel includes: a first display section, a first connector section, a second connector section, and an external connector; the first display section corresponds to the first light-incident surface of the light-combining prism; the first connector section is used to transmit a driving signal to the second microdisplay panel; the second connector section is used to transmit a driving signal to the third microdisplay panel; and the external connector is used to receive driving signals for driving the first microdisplay panel, the second microdisplay panel, and the third microdisplay panel.

[0012] Optionally, the first microdisplay panel further includes: a register for storing data; the external connector is also adapted to provide signals to the register to adjust the first microdisplay panel, the second microdisplay panel, and the third microdisplay panel.

[0013] Optionally, the temporary storage is located side-by-side with the external connector on the same side.

[0014] Optionally, the first microdisplay panel is used to generate blue light.

[0015] Optionally, the second micro-display panel includes: a second display section and a third connector section; the second display section corresponds to the second light-incident surface of the light-combining prism; the first connector section and the third connector section are disposed on the non-light-incident side of the light-combining prism.

[0016] Optionally, the third micro-display panel includes: a third display section and a fourth connector section; the third display section corresponds to the third light-incident surface of the light-combining prism; the second connector section and the fourth connector section are disposed in cooperation on the third light-incident surface of the light-combining prism.

[0017] Optionally, the first display section includes: a first display chip and a first reinforcing plate, the first display chip being disposed on the first reinforcing plate; the first connector section includes: a first connector and a first circuit board, the first connector being disposed on the first circuit board; the second connector section includes: a second connector and a second circuit board, the second connector being disposed on the second circuit board; the external connector is disposed on the second circuit board, and the external connector and the second connector are located on opposite sides of the second circuit board.

[0018] Optionally, it may also include: a protective frame for protecting the uncovered sides or edges of the light-combining prism.

[0019] Optionally, the protective frame includes: a protective cover and a protective post assembly; the protective cover includes four sides; the protective post assembly includes: a first protective post and a second protective post, the first protective post and the second protective post being connected to the two ends of a first side of the protective cover respectively, and the first protective post and the second protective post being perpendicular to the plane of the protective cover.

[0020] Optionally, the first protective post and the second protective post are provided with limiting grooves near the edge of the light combining prism to accommodate the edge of the light combining prism.

[0021] Optionally, the material of the protective frame may include metal or alloy.

[0022] Optionally, the end of the first display portion protrudes beyond the edge of the light-combining prism, such that there is a first support gap between the first connector portion and the light-combining prism; the third connector portion is electrically connected to the first connector portion, and the electrical connection position is located within the first support gap.

[0023] Optionally, a second support gap is provided between the second connector portion and the light-combining prism, and the electrical connection position between the fourth connector portion and the second connector portion is located in the second support gap.

[0024] Optionally, the third micro-display panel is located in the second support gap.

[0025] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0026] The light-combining device of this utility model includes: a light-combining prism for mixing light rays incident through multiple incident surfaces and emitting them through an emitting surface; the light-combining prism includes multiple side surfaces, one of which serves as an emitting surface and multiple of the remaining side surfaces as incident surfaces; and a lens assembly for adjusting the light emitted from the light-combining prism; the emitting surface of the light-combining prism is in direct contact with the lens assembly. By directly contacting the light-combining prism with the lens assembly, compared to the traditional structure where the light-combining prism is fitted into a mounting frame and then connected to the lens assembly via the mounting frame, the gap of one side of the mounting frame between the light-combining prism and the lens assembly is eliminated, effectively reducing the overall length of the light-combining prism and the lens assembly. Since the micro-projection optical engine formed based on the light-combining device needs to be mounted perpendicular to the lens direction in the outer frame of eyeglasses, the reduction in length makes it easier to mount the micro-projection optical engine in the outer frame of eyeglasses, meeting the miniaturization and portability requirements of modern electronic devices.

[0027] Furthermore, the optical center of the light-combining prism lies on the optical central axis of the lens assembly. This aligned optical central axis helps reduce errors in the optical system, improving its stability and reliability. It also reduces light loss during transmission, increasing the overall light energy utilization of the optical system and enhancing its overall performance.

[0028] In the micro-projection optical engine of this utility model, the light-emitting surface of the light-combining prism in the light-combining device directly contacts the lens assembly. By directly contacting the light-combining prism with the lens assembly, compared to the traditional structure where the light-combining prism is fitted into a mounting frame and then connected to the lens assembly via the mounting frame, the gap of one side of the mounting frame between the light-combining prism and the lens assembly is eliminated. This effectively reduces the overall length of the light-combining prism and the lens assembly, thereby reducing the length of the micro-projection optical engine based on the light-combining device. Since the micro-projection optical engine formed by the light-combining device needs to be mounted perpendicular to the lens direction in the outer frame of eyeglasses, the reduction in length makes it easier to mount the micro-projection optical engine in the outer frame of eyeglasses, meeting the miniaturization and portability requirements of modern electronic devices.

[0029] Furthermore, the first microdisplay panel includes: a first display section, a first connector section, a second connector section, and an external connector; the first display section corresponds to the first light-incident surface of the light-combining prism; the first connector section is used to transmit a driving signal to the second microdisplay panel; the second connector section is used to transmit a driving signal to the third microdisplay panel; and the external connector is used to receive driving signals for driving the first microdisplay panel, the second microdisplay panel, and the third microdisplay panel. By concentrating the external connector, the first connector section, and the second connector section all on the first microdisplay panel, the complexity of the connection lines can be effectively reduced, the signal transmission efficiency can be improved, and the assembly and layout between panels can be facilitated. This effectively reduces the size of the micro-projection optical engine, allowing it to maintain high performance while possessing a smaller form factor, meeting the miniaturization and portability requirements of modern electronic devices.

[0030] Furthermore, the first microdisplay panel also includes a register for storing data; the external connector is also adapted to provide signals to the register to adjust the first microdisplay panel, the second microdisplay panel, and the third microdisplay panel. By using an electrical connection between the register and the external connector to achieve data transmission and correction functions, an external control device can control the register based on the external connector to simultaneously transmit the data from the register to multiple microdisplay panels, avoiding the need to set registers on each microdisplay panel, thereby effectively reducing the size of the device and lowering the production costs caused by adding multiple registers.

[0031] Furthermore, it also includes a protective frame for protecting the uncovered sides or edges of the beam combining prism. The protective frame effectively prevents the beam combining prism from accidental impacts or scratches during use or assembly, reducing physical damage. By protecting the critical components of the beam combining prism with the protective frame, the degradation of optical performance due to damage is reduced, thereby extending the service life of the beam combining prism.

[0032] Furthermore, the protective frame includes a protective cover and a protective post assembly; the protective cover includes four sides; the protective post assembly includes a first protective post and a second protective post, the first and second protective posts being connected to the two ends of a first side of the protective cover, and the first and second protective posts being perpendicular to the plane of the protective cover. The structural morphology of the protective frame allows the protective cover to be directly connected to the lens assembly, including the positioning frame at the tail end, eliminating the need for additional protective posts between the beam-combining prism and the lens assembly, while still providing excellent coverage and protection for the beam-combining prism.

[0033] Furthermore, the first and second protective posts are provided with limiting grooves near the edge of the beam combining prism to accommodate the edge of the beam combining prism. These limiting grooves precisely fix the position of the beam combining prism, preventing displacement or shaking during use. This not only improves the stability and imaging quality of the optical system but also enhances the structural safety of the beam combining prism, avoiding damage caused by external impacts, thereby extending its service life and ensuring long-term stable operation of the optical system.

[0034] Furthermore, the protective frame is made of metal or alloy. Metal or alloy possesses significant mechanical strength advantages, effectively resisting external impacts and pressures, protecting internal optical components from damage, and ensuring the stability and reliability of the optical system. Simultaneously, metal or alloy materials have excellent heat dissipation properties, rapidly conducting and dissipating the heat generated by the first, second, and third microdisplay panels during operation, preventing optical performance degradation due to high temperatures, thereby extending component lifespan and improving the overall performance and stability of the system.

[0035] Furthermore, due to the size and shape characteristics of the first display unit, its end portion protrudes beyond the edge of the light-combining prism. This protruding portion lacks flexibility and cannot be bent, resulting in the formation of the first support gap between the first connector and the light-combining prism. If this first support gap is ignored in the design of the micro-display panel enclosing the light-combining prism, the size of the micro-projection optical engine will unnecessarily increase. Therefore, by making reasonable use of the space in the first support gap, the size of the micro-projection optical engine can be further reduced. Specifically, by cleverly placing the electrical connection between the third connector and the first connector within the first support gap, this structural design not only avoids occupying additional space elsewhere but also fills the space within the first support gap. This improves the encapsulation of the light-combining prism by the micro-display panel, making the connection between the micro-display panel and the light-combining prism tighter, further reducing the size of the micro-projection optical engine. This allows it to maintain high performance while possessing a smaller form factor, meeting the miniaturization and portability requirements of modern electronic devices.

[0036] Furthermore, a second support gap exists between the second connector portion and the light-combining prism, and the electrical connection position between the fourth connector portion and the second connector portion is located within the second support gap. By placing the electrical connection position between the fourth connector portion and the second connector portion within the second support gap, it is possible to further avoid the electrical connection position occupying additional space in other locations, and it can also fill the space within the second support gap. This improves the encapsulation of the light-combining prism by the micro-display panel, making the connection between the micro-display panel and the light-combining prism tighter, and further reducing the size of the micro-projection optical engine.

[0037] Furthermore, the third micro-display panel is located in the second support gap. By placing the entire third micro-display panel within the second support gap, the third micro-display panel occupies no additional space, maximizing the utilization of redundant space and further reducing the size of the micro-projection optical engine. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the front structure of the first micro-display panel in the micro-projection optical engine of this utility model embodiment;

[0039] Figure 2 This is a schematic diagram of the back structure of the first micro-display panel in the micro-projection optical engine of this utility model embodiment;

[0040] Figure 3 This is a schematic diagram of the front structure of the second micro-display panel in the micro-projection optical engine of this utility model embodiment;

[0041] Figure 4 This is a schematic diagram of the back structure of the second micro-display panel in the micro-projection optical engine of this utility model embodiment;

[0042] Figure 5 This is a schematic diagram of the front structure of the third micro-display panel in the micro-projection optical engine of this utility model embodiment;

[0043] Figure 6 This is a schematic diagram of the back structure of the third micro-display panel in the micro-projection optical engine of this utility model embodiment;

[0044] Figure 7 This is a schematic diagram of the overall structure of the micro-projection optical engine according to an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the exploded structure of the micro-projection optical engine according to an embodiment of this utility model;

[0046] Figure 9 yes Figure 7 A schematic diagram of the structure of the micro-projection optical engine projecting along the D1 direction;

[0047] Figure 10 yes Figure 7 A schematic diagram of the structure of the micro-projection optical engine projecting along the D2 direction;

[0048] Figure 11 yes Figure 7 A schematic diagram of the structure of the micro-projection optical engine projecting along the D3 direction;

[0049] Figure 12 yes Figure 7 A schematic diagram of the structure of the micro-projection optical engine projecting along the D4 direction;

[0050] Figure 13 yes Figure 7 A schematic diagram of the structure of the micro-projection optical engine projecting along the D5 direction;

[0051] Figure 14 This is a first-view exploded structural diagram of the light-combining device and protective frame according to an embodiment of this utility model;

[0052] Figure 15 This is a second-view exploded structural diagram of the light-combining device and protective frame according to an embodiment of this utility model;

[0053] Figure 16 This is a schematic diagram of the projection principle structure of the light combining prism in the micro-projection optical engine of this utility model embodiment. Detailed Implementation

[0054] As described in the background section, the need for miniaturization of micro-projection optical engines is becoming increasingly urgent and is one of the problems that urgently need to be solved.

[0055] Based on this, the present invention provides a light combining device and a micro-projection optical engine, comprising: a light combining prism for mixing light incident through multiple incident surfaces and emitting it through an emitting surface, the light combining prism having multiple sides, one of which serves as an emitting surface and multiple of the remaining sides serving as incident surfaces; a lens assembly for adjusting the light emitted from the light combining prism; the emitting surface of the light combining prism is in direct contact with the lens assembly. By directly contacting the light combining prism with the lens assembly, compared to the traditional structure where the light combining prism is fitted into a mounting frame and then connected to the lens assembly through the mounting frame, the gap of one frame of the mounting frame between the light combining prism and the lens assembly is eliminated, effectively reducing the overall length of the light combining prism and the lens assembly. Since the micro-projection optical engine formed based on the light combining device needs to be mounted perpendicular to the lens direction in the outer frame of eyeglasses, the reduction in length makes it easier to mount the micro-projection optical engine in the outer frame of eyeglasses, meeting the miniaturization and portability requirements of modern electronic devices.

[0056] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0057] In the description of this utility model, it should be understood that the terms "upper," "lower," "top surface," "bottom surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model. Furthermore, the terms "first" and "second" are only used to distinguish an entity or operation from another entity or operation, and do not require or imply any actual relationship, order, or relative importance between these entities or operations.

[0058] Figure 1 This is a schematic diagram of the front structure of the first micro-display panel in the micro-projection optical engine of this utility model embodiment; Figure 2 This is a schematic diagram of the back structure of the first micro-display panel in the micro-projection optical engine of this utility model embodiment; Figure 3 This is a schematic diagram of the front structure of the second micro-display panel in the micro-projection optical engine of this utility model embodiment; Figure 4 This is a schematic diagram of the back structure of the second micro-display panel in the micro-projection optical engine of this utility model embodiment; Figure 5 This is a schematic diagram of the front structure of the third micro-display panel in the micro-projection optical engine of this utility model embodiment; Figure 6 This is a schematic diagram of the back structure of the third micro-display panel in the micro-projection optical engine of this utility model embodiment; Figure 7 This is a schematic diagram of the overall structure of the micro-projection optical engine according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the exploded structure of the micro-projection optical engine according to an embodiment of this utility model; Figure 9 yes Figure 7 A schematic diagram of the structure of the micro-projection optical engine projecting along the D1 direction; Figure 10 yes Figure 7 A schematic diagram of the structure of the micro-projection optical engine projecting along the D2 direction; Figure 11 yes Figure 7 A schematic diagram of the structure of the micro-projection optical engine projecting along the D3 direction; Figure 12 yes Figure 7 A schematic diagram of the structure of the micro-projection optical engine projecting along the D4 direction; Figure 13 yes Figure 7 A schematic diagram of the structure of the micro-projection optical engine projecting along the D5 direction; Figure 14 This is a first-view exploded structural diagram of the light-combining device and protective frame according to an embodiment of this utility model; Figure 15 This is a second-view exploded structural diagram of the light-combining device and protective frame according to an embodiment of this utility model; Figure 16 This is a schematic diagram of the projection principle structure of the light combining prism in the micro-projection optical engine of this utility model embodiment.

[0059] Please refer to Figures 14 to 15 A light combining device includes: a light combining prism 400 for mixing light rays incident through multiple incident surfaces and emitting them through an emitting surface, the light combining prism 400 including multiple sides, one side serving as an emitting surface and multiple of the remaining sides serving as incident surfaces; a lens assembly 500 for adjusting the light rays emitted from the light combining prism 400; the emitting surface of the light combining prism 400 is in direct contact with the lens assembly 500.

[0060] It should be noted that, due to the extremely small size of the light-combining prism 400 in the field of micro-display technology, it is typically necessary to first place the light-combining prism 400 within a mounting frame before connecting the mounting frame to the lens assembly 500. Removing the mounting frame would pose significant technical difficulties for the alignment, fixation, and protection of the light-combining prism 400, and those skilled in the art would generally not consider removing the traditional mounting frame.

[0061] In this embodiment, by directly contacting the light-combining prism 400 with the lens assembly 500, compared to the traditional structure where the light-combining prism 400 is fitted into a mounting frame and then connected to the lens assembly 500 via the mounting frame, the gap of one edge of the mounting frame between the light-combining prism 400 and the lens assembly 500 is eliminated, effectively reducing the overall length of the light-combining prism 400 and the lens assembly 500. Since the micro-projection optical engine formed based on the light-combining device needs to be mounted perpendicular to the lens direction in the outer frame of the glasses, the reduction in length makes it easier to mount the micro-projection optical engine in the outer frame of the glasses, thus meeting the miniaturization and portability requirements of modern electronic devices.

[0062] In this embodiment, the optical center of the light-combining prism 400 lies on the optical central axis of the lens assembly 500. Aligned optical central axes help reduce errors in the optical system, improving its stability and reliability. They also reduce light loss during transmission, increasing the overall light energy utilization of the optical system and enhancing its overall performance.

[0063] In this embodiment, the light-emitting surface of the light-combining prism 400 is connected to the lens assembly 500 via an adhesive; the lens assembly 500 includes a positioning frame 5001 at the rear end and a lens module 5002, and the distance between the light-emitting surface of the light-combining prism 400 and the lens in the lens module 5002 closest to the positioning frame 5001 is 0.30mm~0.40mm.

[0064] Accordingly, this utility model embodiment also provides a micro-projection optical engine, please refer to... Figures 1 to 8 And continue to combine with references Figure 14 and Figure 15 The device includes: a panel assembly and a light-combining device as described in any of the above technical solutions; the panel assembly is adapted to enclose the light-combining device; the panel assembly includes a first micro-display panel 100, a second micro-display panel 200 and a third micro-display panel 300, wherein the light-emitting portions of the first micro-display panel 100, the second micro-display panel 200 and the third micro-display panel 300 respectively cooperate with the three light-incident surfaces of the light-combining prism 400.

[0065] By directly contacting the light-combining prism 400 with the lens assembly 500, compared to the traditional structure where the light-combining prism 400 is fitted into a mounting frame and then connected to the lens assembly 500 via the mounting frame, the gap of one edge of the mounting frame between the light-combining prism 400 and the lens assembly 500 is eliminated. This effectively reduces the overall length of the light-combining prism 400 and the lens assembly 500, thereby reducing the length of the micro-projection optical engine based on the light-combining device. Since the micro-projection optical engine formed by the light-combining device needs to be mounted perpendicular to the lens direction in the outer frame of the glasses, the reduction in length makes it easier to mount the micro-projection optical engine in the outer frame of the glasses, meeting the miniaturization and portability requirements of modern electronic devices.

[0066] In this embodiment, the length of the micro-projection optical engine (i.e., the total dimension along the length direction X) is equivalent to the sum of the longitudinal dimension of the light-emitting part (i.e., the first display part 1001) of the first micro-display panel 100 and the optical axis dimension of the lens assembly 500 (equivalent to the same or with an error of ±10%).

[0067] Please continue to refer to this. Figure 1 and Figure 2In this embodiment, the first microdisplay panel 100 includes: a first display section 1001, a first connector section 1002, a second connector section 1003, and an external connector 1007; the first display section 1001 corresponds to the first light-incident surface of the light-combining prism 400; the first connector section 1002 is used to transmit a driving signal to the second microdisplay panel 200; the second connector section 1003 is used to transmit a driving signal to the third microdisplay panel 300; and the external connector 1007 is used to receive driving signals for driving the first microdisplay panel 100, the second microdisplay panel 200, and the third microdisplay panel 300. By concentrating the external connector 1007, the first connector section 1002, and the second connector section 1003 on the first microdisplay panel 100, the complexity of the connection lines can be effectively reduced, the signal transmission efficiency can be improved, and the assembly and layout between panels can be facilitated. This effectively reduces the size of the micro-projection optical engine, allowing it to maintain high performance while possessing a smaller form factor, meeting the miniaturization and portability requirements of modern electronic devices.

[0068] Please continue to refer to this. Figure 2 In this embodiment, the first microdisplay panel 100 further includes a register 1006 for storing data; the external connector 1007 is also adapted to provide signals to the register 1006 to adjust the first microdisplay panel 100, the second microdisplay panel 200, and the third microdisplay panel 300. By using an electrical connection between the register 1006 and the external connector 1007 to achieve data transmission and correction functions, an external control device can control the register 1006 based on the external connector 1007, so as to realize the simultaneous transmission of data from the register 1006 to multiple microdisplay panels, avoiding the need to set registers 1006 on each microdisplay panel, thereby effectively reducing the size of the device and reducing the production cost caused by adding multiple registers 1006.

[0069] Please continue to refer to this. Figure 2 In this embodiment, the temporary register 1006 and the external connector 1007 are located side by side on the same side.

[0070] In this embodiment, the first microdisplay panel 100 is used to generate blue light. By allocating the first connector portion 1002, the second connector portion 1003, the external connector 1007, and the temporary storage unit 1006 to the first microdisplay panel 100, the load on the first microdisplay panel 100 becomes relatively large. However, since blue light is least affected by temperature, selecting the first display portion 1001 that emits blue light within the first microdisplay panel 100 can effectively reduce the problem of large color deviation caused by excessive load, thereby improving the display effect of the final color-matched micro-projection optical engine.

[0071] Please continue to refer to this. Figure 3 and Figure 4 In this embodiment, the second micro-display panel 200 includes: a second display portion 2001 and a third connector portion 2002; the second display portion 2001 corresponds to the second light-incident surface of the light-combining prism 400; the first connector portion 1002 and the third connector portion 2002 are disposed in cooperation on the non-light-incident side of the light-combining prism 400.

[0072] Please continue to refer to this. Figure 5 and Figure 6 In this embodiment, the third micro-display panel 300 includes: a third display portion 3001 and a fourth connector portion 3002; the third display portion 3001 corresponds to the third light-incident surface of the light-combining prism 400; the second connector portion 1003 and the fourth connector portion 3002 are disposed in cooperation on the third light-incident surface of the light-combining prism 400.

[0073] Please continue to refer to this. Figure 1 and Figure 2In this embodiment, the first display unit 1001 includes a first display chip 1001a and a first reinforcing plate 1001b, with the first display chip 1001a disposed on the first reinforcing plate 1001b; the first connector unit 1002 includes a first connector 1002a and a first circuit board 1002b, with the first connector 1002a disposed on the first circuit board 1002b; the second connector unit 1003 includes a second connector 1003a and a second circuit board 1003b, with the second connector 1003a disposed on the second circuit board 1003b; the external connector 1007 is disposed on the second circuit board 1003b, and the external connector 1007 and the second connector 1003a are located on opposite sides of the second circuit board 1003b. Since the side of the second connector 1003a located will be blocked and covered by the third micro-display panel 300 after it is electrically connected to the second micro-display panel 200 and the third micro-display panel 300. Therefore, by placing the external connector 1007 on the second circuit board 1003b and on a different side from the second connector 1003a, it is possible to facilitate the electrical connection between external devices and the external connector 1007, thereby enhancing the maintainability and scalability of the micro-projection optical engine.

[0074] Please continue to refer to this. Figure 1 and Figure 2 In this embodiment, there is no projection overlap between the external connector 1007 and the second connector 1003a. The external connector 1007 and the second connector 1003a are spatially staggered. This arrangement effectively avoids electromagnetic interference caused by close proximity or spatial overlap between the connectors, ensuring the stability and integrity of signal transmission, thereby improving the performance and reliability of the micro-display optomechanical system.

[0075] Please continue to refer to this. Figure 14 and Figure 15 In this embodiment, the micro-projection optical engine further includes a protective frame 600 for protecting the uncovered sides or edges of the beam combining prism 400. The protective frame 600 effectively prevents the beam combining prism 400 from accidental impacts or scratches during use or assembly, reducing physical damage. By protecting the critical components of the beam combining prism 400 with the protective frame 600, the degradation of optical performance due to damage is reduced, thereby extending the service life of the beam combining prism 400.

[0076] Please continue to refer to this. Figure 14 and Figure 15In this embodiment, the protective frame 600 includes a protective cover 6001 and a protective post assembly. The protective cover 6001 includes four sides. The protective post assembly includes a first protective post 6002 and a second protective post 6003. The first protective post 6002 and the second protective post 6003 are respectively connected to both ends of a first side of the protective cover 6001, and the first protective post 6002 and the second protective post 6003 are perpendicular to the plane of the protective cover 6001. The structural morphology of the protective frame 600 allows the protective cover 6001 to be directly connected to the positioning frame 5001 at the tail end of the lens assembly 500. This eliminates the need to add a protective post between the beam combining prism 400 and the lens assembly 500, while also providing excellent coverage and protection for the beam combining prism 400.

[0077] Please continue to refer to this. Figure 14 and Figure 15 In this embodiment, the first protective post 6002 and the second protective post 6003 are provided with limiting grooves 6004 near the edge of the beam combining prism 400 to accommodate the edge of the beam combining prism 400. The limiting grooves 6004, by accommodating the edge of the beam combining prism 400, can precisely fix the position of the beam combining prism 400, preventing it from shifting or shaking during use. This not only improves the stability and imaging quality of the optical system but also enhances the structural safety of the beam combining prism 400, avoiding damage caused by external impacts, thereby extending its service life and ensuring the long-term stable operation of the optical system.

[0078] In this embodiment, the protective frame 600 is made of metal or alloy. Metal or alloy possesses significant mechanical strength advantages, effectively resisting external impacts and pressures, protecting internal optical components from damage, and ensuring the stability and reliability of the optical system. Simultaneously, metal or alloy materials have excellent heat dissipation properties, rapidly conducting and dissipating the heat generated by the first microdisplay panel 100, the second microdisplay panel 200, and the third microdisplay panel 300 during operation, preventing optical performance degradation due to high temperatures, thereby extending the component's lifespan and improving the overall performance and stability of the system.

[0079] Please continue to refer to this. Figures 1 to 8In this embodiment, a first microdisplay panel 100 has a first display portion 1001, a first connector portion 1002, and a second connector portion 1003, the second connector portion 1003 and the first connector portion 1002 being electrically connected, and the first connector portion 1002 being electrically connected to the first display portion 1001; a second microdisplay panel 200 has a second display portion 2001 and a third connector portion 2002 being electrically connected; a third microdisplay panel 300 has a third display portion 3001 and a fourth connector portion 3002 being electrically connected; and a light-combining prism 40. 0. The light-combining prism 400 includes a light-emitting surface and three light-incident surfaces; the first micro-display panel 100, the second micro-display panel 200, and the third micro-display panel 300 are electrically connected and surround the light-combining prism 400; wherein, the end of the first display part 1001 protrudes beyond the edge of the light-combining prism 400, such that there is a first support gap G1 between the first connector part 1002 and the light-combining prism 400; the third connector part 2002 is electrically connected to the first connector part 1002, and the electrical connection position is located within the first support gap G1; the fourth connector part 3002 is electrically connected to the second connector part 1003.

[0080] Please continue to refer to this. Figures 1 to 8 In this embodiment, the second connector portion 1003 and the first connector portion 1002 are electrically connected by a first electrical connector 1004; the first connector portion 1002 and the first display portion 1001 are electrically connected by a second electrical connector 1005.

[0081] In this embodiment, the reason why the end of the first display unit 1001 protrudes beyond the edge of the light-combining prism 400 is that the first display unit 1001 is modified to be a vertically oriented screen, meaning that the dimension of the display screen along the direction extending from the first display unit 1001 is larger than the dimension perpendicular to the direction extending from the first display unit 1001. This lengthens the dimension of the first display unit 1001 along its extension direction, thereby compressing the dimension of the light-combining prism 400 along the length direction X of the micro-projection optical engine, further increasing the dimension of the micro-projection optical engine along its length direction X. When the dimension of the first display unit 1001 along its extension direction increases, the problem of the end of the first display unit 1001 protruding beyond the edge of the light-combining prism 400 arises.

[0082] By arranging the first micro-display panel 100, the second micro-display panel 200, and the third micro-display panel 300 around the light-combining prism 400, this enclosed layout allows for a tight fit between the micro-display panels and the light-combining prism 400, significantly reducing the overall space occupied by the micro-projection optical engine. Furthermore, after the first display portion 1001 is attached to the light-incident surface, the second electrical connector 1005 needs to be bent to ensure that the first micro-display panel 100 completely encloses the light-combining prism 400. After the second electrical connector 1005 is bent, the first connector portion 1002 will be bent to correspond to the other side of the light-combining prism 400. Due to the size and shape characteristics of the first display unit 1001, the portion near the end of the second electrical connector 1005 protrudes beyond the edge of the light-combining prism 400. This protruding portion lacks flexibility and cannot be bent, preventing the first connector portion 1002 from fitting snugly against the corresponding side of the light-combining prism 400. This results in an objective first support gap G1 between the first connector portion 1002 and the light-combining prism 400. If this first support gap G1 is ignored in the design of the micro-display panel enclosing the light-combining prism 400, the size of the micro-projection optical engine will unnecessarily increase. Therefore, by making reasonable use of the space in the first support gap G1, the size of the micro-projection optical engine can be further reduced. Specifically, by cleverly placing the electrical connection position of the third connector portion 2002 and the first connector portion 1002 within the first support gap G1, this structural design not only avoids occupying additional space in other locations, but also fills the space within the first support gap G1. This improves the encapsulation of the micro-display panel on the light-combining prism 400, making the connection between the micro-display panel and the light-combining prism 400 tighter, further reducing the size of the micro-projection optical engine, and enabling it to maintain high performance while having a smaller form factor, meeting the needs of modern electronic devices for miniaturization and portability.

[0083] Please continue to refer to this. Figure 1 and Figure 2 In this embodiment, the first display portion 1001, the first connector portion 1002, and the second connector portion 1003 are arranged in the same direction. This arrangement complements the structure of the first micro-display panel 100 enclosing the light-combining prism 400. Its advantage is that the first micro-display panel 100 primarily occupies area in a single direction, avoiding excessive redundant space in other directions. This design optimizes space utilization efficiency, provides a basis for reducing the size of the micro-projection device, and helps achieve miniaturization and portability while ensuring that the device's performance and functionality are not affected.

[0084] Please continue to refer to this. Figure 1 In this embodiment, the first display portion 1001 has a first dimension d1 along the direction perpendicular to the arrangement, and the first connector portion 1002 and the second connector have a second dimension d2 along the direction perpendicular to the arrangement, wherein the second dimension d2 is greater than the first dimension d1.

[0085] Because the first connector portion 1002 and the second connector portion 1003 typically need to accommodate more pins, interfaces, or circuit elements for signal transmission and distribution, the layout of these elements requires more space. Therefore, the second dimension d2 needs to be larger than the first dimension d1 to ensure the structural integrity and functional stability of the first connector portion 1002 and the second connector portion 1003. The first connector portion 1002 and the second connector portion 1003 typically need to handle multiple signals, including power signals, control signals, and data signals. A larger size provides more stable electrical performance, reduces signal interference and transmission loss, thereby improving signal integrity and reliability. The first connector portion 1002 and the second connector portion 1003 may generate heat during operation; a larger size helps dissipate heat and prevents performance degradation or damage due to heat buildup. A larger size provides better mechanical stability, reducing loosening or damage to the first connector portion 1002 and the second connector portion 1003 caused by external forces or vibrations, thereby improving the reliability and durability of the device. A larger size provides space for future upgrades and expansions, such as adding more connection options or supporting higher bandwidth signal transmission.

[0086] Please continue to refer to this. Figure 1 It should be noted that, in this embodiment, since the second dimension d2 of the first connector portion 1002 is greater than the first dimension d1 of the first display portion 1001, the width dimension of the second electrical connector 1005 needs to be based on the first dimension d1 of the first display portion 1001 when the two are electrically connected; while the dimensions of the first connector portion 1002 and the second connector portion 1003 along the direction perpendicular to the arrangement are both the second dimension d2, so the width dimension of the first electrical connector 1004 only needs to be less than the second dimension d2.

[0087] In this embodiment, the width of the first electrical connector 1004 is greater than the width of the second electrical connector 1005. This increases the contact area and current carrying capacity of the first electrical connector 1004, thereby reducing resistance, minimizing energy loss during signal transmission, and improving the stability and efficiency of signal transmission.

[0088] Please continue to refer to this. Figures 4 to 6In this embodiment, the second display unit 2001 includes: a second display chip 2001a and a second reinforcing plate 2001b, wherein the second display chip 2001a is disposed on the second reinforcing plate 2001b; the third connector unit 2002 includes: a third connector 2002a and a third circuit board 2002b, wherein the third connector 2002a is disposed on the third circuit board 2002b; the third display unit 3001 includes: a third display chip 3001a and a third reinforcing plate, wherein the third display chip 3001a is disposed on the third reinforcing plate 3001b; the fourth connector unit 3002 includes: a fourth connector 3002a and a fourth circuit board, wherein the fourth connector 3002a is disposed on the fourth circuit board 3002b.

[0089] By fixing the first display chip 1001a, the second display chip 2001a, the third display chip 3001a, the first connector 1002a, the second connector 1003a, the third connector 2002a, and the fourth connector 3002a to their corresponding reinforcing plates and circuit boards, the structural stability of each component is significantly enhanced. Within the compact space of the micro-projection optical engine, the reinforcing plates and circuit boards effectively prevent the display chips and connectors from deforming or shifting due to external forces or their own weight, thereby ensuring the stability of signal transmission and the consistency of display effects. This design not only improves the reliability of the device but also allows for a more compact and orderly arrangement of components, further optimizing space utilization and providing strong support for the miniaturization and high performance of the device.

[0090] It should be noted that the first display chip 1001a, the second display chip 2001a, and the third display chip 3001a are primarily responsible for image generation and display. Specifically, the display chips receive signals and convert them into visual images to achieve the projection function. The first display chip 1001a, the second display chip 2001a, and the third display chip 3001a are all monochrome displays. For example, the three display chips display red, blue, and green respectively. For instance, the first microdisplay panel 100 can be a blue microdisplay panel, the second microdisplay panel 200 can be a green microdisplay panel, and the third microdisplay panel 300 can be a red microdisplay panel. Correspondingly, the first display chip 1001a generates blue light, the second display chip 2001a generates green light, and the third display chip 3001a generates red light.

[0091] The first connector 1002a, the second connector 1003a, the third connector 2002a, and the fourth connector 3002a specifically undertake electrical connection. For example, the electrical connection between the third connector 2002a and the first connector 1002a is actually achieved by the insertion of the third connector 2002a and the first connector 1002a, and the corresponding electrical connection position is the position where the third connector 2002a and the first connector 1002a are inserted; similarly, the electrical connection between the fourth connector 3002a and the second connector 1003a is achieved by the insertion of the fourth connector 3002a and the second connector 1003a, and the corresponding electrical connection position is the position where the fourth connector 3002a and the second connector 1003a are inserted.

[0092] The function of each reinforcing plate and circuit board is to enhance the structural stability of the display chip and connectors, preventing deformation or displacement due to external forces or their own weight within the compact space of the micro-projection optical engine. Therefore, the material of each reinforcing plate should possess sufficient strength and rigidity. For example, common high-strength plastics, aluminum alloys, or other metal materials are suitable choices. These materials not only provide sufficient support but also reduce the overall weight of the device to some extent, contributing to its miniaturization and high performance.

[0093] Please continue to refer to this. Figure 7 and Figure 8 In this embodiment, the light combining prism 400 has a cuboid structure; the light emission paths of the first display unit 1001, the second display unit 2001 and the third display unit 3001 are respectively attached to the three light incident surfaces of the light combining prism 400. The emitted light enters the light combining prism 400 through each light incident surface, is mixed, and then exits through the light emission surface.

[0094] Please refer to Figures 9 to 13 And continue to combine with references Figure 1 , Figure 2 , Figure 7 and Figure 8In this embodiment, the first display chip 1001a, the first connector 1002a, and the second connector 1003a are all located on the front side of the first microdisplay panel 100; the first microdisplay panel 100 surrounds the light-combining prism 400 in a U-shape; wherein, the first display portion 1001 and the first connector portion 1002 are bent based on the second electrical connector 1005, respectively corresponding to the first surface S1 and the second surface S2 in the light-combining prism 400; the first connector portion 1002 and the second connector portion 1003 are bent based on the first electrical connector 1004, respectively corresponding to the second surface S2 and the third surface S3 in the light-combining prism 400; the first surface S1 and the second surface S2 are perpendicular, the second surface S2 and the third surface S3 are perpendicular, and the first surface S1 and the third surface S3 are parallel.

[0095] The first display chip 1001a, the first connector 1002a, and the second connector 1003a are all located on the front side of the first microdisplay panel 100. This layout allows these key components to be tightly integrated, facilitating signal transmission and management. Simultaneously, the first microdisplay panel 100 surrounds the light-combining prism 400 in a U-shape. This design not only optimizes space utilization but also improves the structural stability and signal transmission efficiency of the entire assembly. Specifically, the U-shaped layout of the first microdisplay panel 100 allows the first display chip 1001a, the first connector 1002a, and the second connector 1003a to be arranged tightly around the light-combining prism 400. The first display portion 1001 and the first connector portion 1002 are bent together by the second electrical connector 1005, corresponding to the first surface S1 and the second surface S2 in the light-combining prism 400, respectively; the first connector portion 1002 and the second connector portion 1003 are bent together by the first electrical connector 1004, corresponding to the second surface S2 and the third surface S3 in the light-combining prism 400, respectively. This bending design allows the display chip and connector to adapt to the cuboid structure of the light-combining prism 400, ensuring the stability and reliability of signal transmission. In addition, the U-shaped enclosure significantly optimizes space utilization, allowing the first micro-display panel 100 to fit the structural shape of the light-combining prism 400, closely adhering to the light-combining prism 400, reducing the overall size of the device, and contributing to the miniaturization of the device.

[0096] In this embodiment, since the first display part 1001 is attached to the first surface S1, the first surface S1 is one of the light-incident surfaces (i.e., the first light-incident surface) in the light-combining prism 400.

[0097] In this embodiment, the first support gap G1 between the first connector portion 1002 and the light combining prism 400 specifically means that the first connector portion 1002 and the second surface S2 have the first support gap G1.

[0098] In this embodiment, the first electrical connector 1004 is bent at a 90° angle; the second electrical connector 1005 is bent at a 90° angle. The 90° bends of the first and second electrical connectors 1004 and 1005 are designed to accommodate the cuboid structure of the light-combining prism 400, allowing the first micro-display panel 100 to tightly surround the light-combining prism 400 in a U-shaped layout. The 90° bends allow the electrical connectors to connect to surfaces of the light-combining prism 400 in different directions, ensuring the stability and reliability of signal transmission.

[0099] It should be noted that the calibrated data for each micro-display panel includes color accuracy, display uniformity, grayscale value, and color temperature. The temporary register 1006 needs to communicate with the display chip on each micro-display panel to ensure that each micro-display panel can quickly and accurately retrieve the calibrated data during display, thereby guaranteeing the stability and consistency of the display effect. Furthermore, storing the calibration data in the temporary register avoids redundant calibration, thus improving system operating efficiency.

[0100] In this embodiment, both the temporary register 1006 and the external connector 1007 are fixed on the second circuit board 1003b, and the temporary register 1006 and the external connector 1007 are electrically connected. The external connector 1007 serves as a data input port, responsible for receiving display data from external devices, including but not limited to video data, image data, and text data. When an external device transmits display data to the micro-projection optical engine, the display data first reaches the external connector 1007, which is electrically connected to the second connector 1003a, serving as an intermediary. The display data is then transmitted to the first connector 1002a via the first electrical connector 1004, and the first connector 1002a transmits the display data to the first display chip 1001a via the second electrical connector 1005. Meanwhile, due to the electrical connection between the second connector 1003a and the fourth connector 3002a, display data can be transmitted to the fourth connector 3002a, and further transmitted to the third display chip 3001a via the fourth electrical connector 3004. Furthermore, the electrical connection between the first connector 1002a and the third connector 2002a allows display data to be transmitted to the third connector 2002a, and then to the second display chip 2001a via the third electrical connector 2004. Through the above data transmission path, externally transmitted display data can be sent to the first display chip 1001a, the second display chip 2001a, and the third display chip 3001a to achieve synchronous display of the three display chips. Although the content displayed by the three display chips is essentially the same, differences in their manufacturing processes result in different colors of light emitted. Specifically, the first display chip 1001a emits blue light, the second display chip 2001a emits green light, and the third display chip 3001a emits red light.

[0101] The electrical connection between the temporary register 1006 and the external connector 1007 plays a crucial role during system startup. When the micro-projection optical engine starts, the external control system controls the temporary register 1006 via the external connector 1007. The temporary register 1006 pre-stores calibration data, which is transmitted via communication to the first display chip 1001a, the second display chip 2001a, and the third display chip 3001a respectively during system startup. The purpose is to perform display calibration on each display chip to compensate for display deviations caused by differences in the chip's own characteristics. This calibration mechanism ensures that the micro-projection optical engine can present a high-quality display effect when different display chips work together.

[0102] In this embodiment, the temporary register 1006 and the external connector 1007 are located on the same side of the second circuit board 1003b to facilitate electrical wiring between the external connector 1007 and the temporary register 1006.

[0103] In this embodiment, the first microdisplay panel 100 is further provided with a plurality of first capacitors 1008 and first resistors 1009. In the microdisplay system, the first capacitors 1008 and first resistors 1009 are crucial for ensuring the normal operation of the first display chip 1001a. The first capacitors 1008 can store charge and play a role in filtering, energy storage, and voltage stabilization in the circuit. For example, in the power supply circuit of the first display chip 1001a, the first capacitors 1008 can effectively filter out ripple and noise in the power supply, providing a stable voltage to the first display chip 1001a and avoiding display abnormalities caused by voltage fluctuations. Simultaneously, the first capacitors 1008 also play a role in buffering and coupling during signal transmission, ensuring signal integrity and accuracy. The first resistors 1009 are mainly used for current limiting, voltage division, and impedance matching. In the driving circuit of the first display chip 1001a, the first resistors 1009 can limit current and prevent overcurrent damage to the chip. Furthermore, the first resistor 1009 can also be used for voltage division to ensure that the voltage of each part of the first display chip 1001a is within a safe range. During signal transmission, the first resistor 1009 can also match impedance, reduce signal reflection and interference, and improve signal quality. Therefore, the proper configuration of the first capacitor 1008 and the first resistor 1009 is a key factor in ensuring the stable and reliable operation of the first display chip 1001a, directly affecting the display effect and the overall performance of the system.

[0104] In this embodiment, the space occupied by the first capacitor 1008 and the first resistor 1009 can be minimized according to the design layout requirements. Simultaneously, spatial interference between the first capacitor 1008 and the first resistor 1009 and other components should be avoided as much as possible. Specifically, according to the design layout requirements, several first capacitors 1008 and first resistors 1009 can be distributed on the first circuit board 1002b and the second circuit board 1003b, and can also be distributed on the front and back of the first micro-display panel 100. For example... Figure 1 and Figure 2As shown, specifically, a portion of the first capacitor 1008 and the first resistor 1009 are distributed on the first circuit board 1002b, and the remaining portion of the first capacitor 1008 and the first resistor 1009 are distributed on the second circuit board 1003b, and are distributed around the temporary register 1006.

[0105] In this embodiment, the connection point of the second electrical connector 1005 and the first display chip 1001a is clamped between the first display chip 1001a and the first reinforcing plate 1001b. By clamping the connection point between the first display chip 1001a and the first reinforcing plate 1001b, a tight contact between the second electrical connector 1005 and the first display chip 1001a is ensured, reducing the risk of loosening due to external vibration or impact. Secondly, this clamping method improves space utilization efficiency, avoiding excessive space occupation by the additional second electrical connector 1005, making the entire micro-display system more compact. Furthermore, the clamping method provides a certain degree of protection, preventing external physical damage to the connection point, thereby extending the service life of the device.

[0106] Please continue to refer to this. Figure 3 and Figure 4 In this embodiment, the width of the second display portion 2001 is smaller than the width of the third connector portion 2002. For the specific reasons, please refer to the above explanation regarding the fact that the second dimension d2 of the first connector portion 1002 and the second connector portion 1003 is larger than the first dimension d1 of the first display portion 1001; further explanation will not be repeated here.

[0107] Please continue to refer to this. Figure 3 and Figure 4 , Figures 7 to 13 In this embodiment, the second display chip 2001a is located on the front side of the second microdisplay panel 200, and the third connector 2002a is located on the back side of the second microdisplay panel 200; the third connector portion 2002 and the second display portion 2001 are electrically connected through a third electrical connector 2004; the second microdisplay panel 200 is L-shaped and surrounds the light-combining prism 400; wherein, the bending between the second display portion 2001 and the third connector portion 2002 based on the third electrical connector 2004 corresponds to the fourth surface S4 and the second surface S2 in the light-combining prism 400, respectively; the fourth surface S4 is perpendicular to the first surface S1, the second surface S2 and the third surface S3, respectively.

[0108] It should be noted that the second display chip 2001a being located on the front side of the second micro-display panel 200 ensures alignment with the optical path of the light-combining prism 400, thereby guaranteeing efficient transmission of image signals to the light-combining prism 400. The third connector 2002a being located on the back side of the second micro-display panel 200 is designed to accommodate the layout of the first micro-display panel 100, where the first display chip 1001a, the first connector 1002a, and the second connector 1003a are all located on the front side of the first micro-display panel 100. This ensures that after the second micro-display panel 200 forms an L-shape surrounding the light-combining prism 400, the third connector 2002a can dock with the first connector 1002a, and the electrical connection position can also be located within the first support gap G1. The second microdisplay panel 200 surrounds the light-combining prism 400 in an L-shape. This design accommodates the cuboid structure of the light-combining prism 400, ensuring that the second display chip 2001a and the third connector 2002a correspond to different surfaces of the light-combining prism 400. Specifically, the second display portion 2001 and the third connector portion 2002 are bent together by the third electrical connector 2004, corresponding to the fourth surface S4 and the second surface S2 of the light-combining prism 400, respectively. This L-shaped layout allows the second microdisplay panel 200 to fit tightly against the light-combining prism 400, reducing space waste and ensuring optimized signal transmission paths. Furthermore, the L-shape shortens the signal path between the second display chip 2001a and the third connector 2002a, reducing signal delay and interference.

[0109] In this embodiment, since the second display part 2001 is attached to the corresponding fourth surface S4, the fourth surface S4 is another light-incident surface (i.e., the second light-incident surface) in the light-combining prism 400.

[0110] In this embodiment, the fifth surface S5 of the light-combining prism 400 is the light-emitting surface, and the fourth surface S4 and the fifth surface S5 are parallel.

[0111] In this embodiment, the third connector portion 2002 is located in the first support gap G1.

[0112] In this embodiment, the third electrical connector 2004 is bent at a 90° angle. This 90° bend in the third electrical connector 2004 is designed to accommodate the cuboid structure of the light-combining prism 400, allowing the second micro-display panel 200 to tightly surround the light-combining prism 400 in an L-shaped layout. The 90° bend allows the electrical connector to be connected to surfaces of the light-combining prism 400 in different directions, ensuring the stability and reliability of signal transmission.

[0113] In this embodiment, the second microdisplay panel 200 is further provided with a plurality of second capacitors 2003 and second resistors 2005. In the microdisplay system, the second capacitors 2003 and second resistors 2005 are crucial for ensuring the normal operation of the second display chip 2001a. The second capacitors 2003 can store charge and play a role in filtering, energy storage, and voltage stabilization in the circuit. For example, in the power supply circuit of the second display chip 2001a, the second capacitors 2003 can effectively filter out ripple and noise in the power supply, providing a stable voltage to the second display chip 2001a and avoiding display abnormalities caused by voltage fluctuations. Simultaneously, the second capacitors 2003 also play a role in buffering and coupling during signal transmission, ensuring signal integrity and accuracy. The second resistors 2005 are mainly used for current limiting, voltage division, and impedance matching. In the driving circuit of the second display chip 2001a, the second resistors 2005 can limit current and prevent overcurrent damage to the chip. Furthermore, the second resistor 2005 can also be used for voltage division, ensuring that the voltage of each part of the second display chip 2001a is within a safe range. During signal transmission, the second resistor 2005 can also match impedance, reducing signal reflection and interference, and improving signal quality. Therefore, the proper configuration of the second capacitor 2003 and the second resistor 2005 is a key factor in ensuring the stable and reliable operation of the second display chip 2001a, directly affecting the display effect and the overall performance of the system.

[0114] In this embodiment, the space occupied by the second capacitor 2003 and the second resistor 2005 can be minimized according to the design layout requirements. Simultaneously, spatial interference between the second capacitor 2003 and the second resistor 2005 and other components should be avoided as much as possible. Specifically, depending on the design layout requirements, several second capacitors 2003 and second resistors 2005 can be distributed on the front or back of the third circuit board 2002b. For example... Figure 3 and Figure 4 As shown, specifically, a portion of the second capacitor 2003 and the second resistor 2005 are distributed on the front side of the third circuit board 2002b, while the third connector is disposed on the back side of the third circuit board 2002b.

[0115] In this embodiment, the connection point of the third electrical connector 2004 and the second display chip 2001a is clamped between the second display chip 2001a and the second reinforcing plate 2001b. By clamping the connection point between the second display chip 2001a and the second reinforcing plate 2001b, a tight contact between the third electrical connector 2004 and the second display chip 2001a is ensured, reducing the risk of loosening due to external vibration or impact. Secondly, this clamping method improves space utilization efficiency, avoiding excessive space occupation by the additional third electrical connector 2004, making the entire micro-display system more compact. Furthermore, the clamping method provides a certain degree of protection, preventing external physical damage to the connection point, thereby extending the service life of the device.

[0116] Please continue to refer to this. Figure 7 In this embodiment, there is a second support gap G2 between the second connector portion 1003 and the light combining prism 400, and the electrical connection position between the fourth connector portion 3002 and the second connector portion 1003 is located in the second support gap G2.

[0117] By placing the electrical connection position of the fourth connector portion 3002 and the second connector portion 1003 within the second support gap G2, it is possible to further avoid the electrical connection position occupying additional space in other positions, and also to fill the space within the second support gap G2, thereby improving the encapsulation of the micro-display panel on the light-combining prism 400, making the connection between the micro-display panel and the light-combining prism 400 tighter, and further reducing the size of the micro-projection optical engine.

[0118] In this embodiment, the third micro-display panel 300 is located in the second support gap G2. By placing the entire third micro-display panel 300 within the second support gap G2, the third micro-display panel 300 occupies no additional space, maximizing the utilization of redundant space and further reducing the size of the micro-projection optical engine.

[0119] Please continue to refer to this. Figure 5 and Figure 6 In this embodiment, the width of the third display portion 3001 is smaller than the width of the fourth connector portion 3002. For the specific reasons, please refer to the above explanation regarding the fact that the second dimension d2 of the first connector portion 1002 and the second connector portion 1003 is larger than the first dimension d1 of the first display portion 1001; further explanation will not be repeated here.

[0120] Please refer to section 5. Figure 13In this embodiment, the third display chip 3001a and the fourth connector 3002a are both located on the front side of the third micro-display panel 300; the fourth connector portion 3002 and the third display portion 3001 are electrically connected through a fourth electrical connector 3004; the third display portion 3001 and the fourth connector portion 3002 are folded together based on the fourth electrical connector 3004 and correspond to the third surface S3 in the light-combining prism 400.

[0121] It should be noted that the third display unit 3001 and the fourth connector unit 3002, when folded together based on the fourth electrical connector 3004, both correspond to the third surface S3 in the light-combining prism 400. This design allows the third display unit 3001 to precisely correspond to and fit against the third surface S3 of the light-combining prism 400, while also ensuring that the third micro-display panel 300 can be completely accommodated within the second support gap G2. This avoids the third micro-display panel 300 occupying additional space in other locations, greatly optimizing space utilization efficiency. Furthermore, the third display chip 3001a and the fourth connector 3002a are both located on the front side of the second micro-display panel 200. This layout ensures that after the fourth electrical connector 3004 completes the folding operation, it not only ensures a tight fit between the third display unit 3001 and the third surface S3 of the light-combining prism 400, but also meets the precise insertion requirements between the fourth connector 3002a and the second connector 1003a. This structural design not only improves the stability and reliability of signal transmission, but also further enhances the structural compactness and space utilization efficiency of the entire component.

[0122] In this embodiment, since the third display part 3001 is attached to the third surface S3 of the light combining prism 400, the third surface S3 is the third light-incident surface (i.e., the third light-incident surface) in the light combining prism 400.

[0123] In this embodiment, the fourth electrical connector 3004 is folded at 180°.

[0124] In this embodiment, the first electrical connector 1004, the second electrical connector 1005, the third electrical connector 2004, and the fourth electrical connector 3004 are all flexible circuit boards. A flexible circuit board is a flexible electronic connection element that can be bent and folded to adapt to complex spatial layouts. The flexibility of a flexible circuit board allows for the flexible connection of various components, enabling easy installation even inside devices with limited space or irregular shapes. Secondly, flexible circuit boards have good conductivity and reliability, ensuring stable signal transmission. Furthermore, flexible circuit boards are thin and lightweight, helping to reduce device weight, further optimizing space utilization, and providing strong support for device miniaturization and high performance.

[0125] In this embodiment, the third micro-display panel 300 is further provided with a plurality of third capacitors 3003 and third resistors 3005. In the micro-display system, the third capacitors 3003 and third resistors 3005 are crucial for ensuring the normal operation of the third display chip 3001a. The third capacitors 3003 can store charge and play a role in filtering, energy storage, and voltage stabilization in the circuit. For example, in the power supply circuit of the third display chip 3001a, the third capacitors 3003 can effectively filter out ripple and noise in the power supply, providing a stable voltage for the third display chip 3001a and avoiding display abnormalities caused by voltage fluctuations. Simultaneously, the third capacitors 3003 also play a role in buffering and coupling during signal transmission, ensuring signal integrity and accuracy. The third resistors 3005 are mainly used for current limiting, voltage division, and impedance matching. In the driving circuit of the third display chip 3001a, the third resistors 3005 can limit current and prevent overcurrent damage to the chip. Furthermore, the third resistor 3005 can also be used for voltage division, ensuring that the voltage of each part of the third display chip 3001a is within a safe range. During signal transmission, the third resistor 3005 can also match impedance, reducing signal reflection and interference, and improving signal quality. Therefore, the proper configuration of the third capacitor 3003 and the third resistor 3005 is a key factor in ensuring the stable and reliable operation of the third display chip 3001a, directly affecting the display effect and the overall performance of the system.

[0126] In this embodiment, the additional space occupied by the third capacitor 3003 and the third resistor 3005 can be minimized according to the design layout requirements. At the same time, spatial interference between the third capacitor 3003 and the third resistor 3005 and other device structures should also be avoided as much as possible. Specifically, according to the design layout requirements, several of the third capacitors 3003 and the third resistors 3005 can be distributed on the front or back of the fourth circuit board 3002b. For example... Figure 3 and Figure 4 As shown, specifically, a portion of the third capacitor 3003 and the third resistor 3005 are distributed on the front side of the fourth circuit board 3002b, and the fourth connector is also disposed on the front side of the fourth circuit board 3002b.

[0127] In this embodiment, the third micro-display panel 300 further includes a protective adhesive layer 3006. The protective adhesive layer 3006 is located on the fourth circuit board 3002b. The protective adhesive layer 3006, along with a plurality of third capacitors 3003 and third resistors 3005, is located on the same side of the fourth circuit board 3002b, and the height of the protective adhesive layer 3006 is higher than the height of the third capacitors 3003 and third resistors 3005. Because the third capacitors 3003 and third resistors 3005 are at risk of being squeezed after the third micro-display panel 300 and the first micro-display panel 100 are electrically connected, the protective adhesive layer 3006, which is higher on the same side as the third capacitors 3003 and third resistors 3005, provides support and protection for the third capacitors 3003 and third resistors 3005.

[0128] In this embodiment, the protective adhesive layer 3006 may cover part of the third capacitor 3003 and the third resistor 3005.

[0129] In this embodiment, the connection point of the fourth electrical connector 3004 and the third display chip 3001a is clamped between the third display chip 3001a and the third reinforcing plate 3001b. By clamping the connection point between the third display chip 3001a and the third reinforcing plate 3001b, a tight contact between the fourth electrical connector 3004 and the third display chip 3001a is ensured, reducing the risk of loosening due to external vibration or impact. Secondly, this clamping method improves space utilization efficiency, avoiding excessive space occupation by the additional fourth electrical connector 3004, making the entire micro-display system more compact. Furthermore, the clamping method provides a certain degree of protection, preventing external physical damage to the connection point, thereby extending the service life of the device.

[0130] In this embodiment, each connector has a corresponding mark. Specifically, the first connector 1002a has a first mark 1010, the second connector 1003a has a second mark 1011, the third connector 2002a has a third mark 2006, the fourth connector 3002a has a fourth mark 3007, and the external connector 1007 has a fifth mark 1012. The first mark 1010 is located on the first circuit board 1002b where the first connector 1002a is located; the second mark 1011 is located on the second circuit board 1003b where the second connector 1003a is located; the third mark 2006 is located on the third circuit board 2002b where the third connector 2002a is located; the fourth mark 3007 is located on the fourth circuit board 3002b where the fourth connector 3002a is located; and the fifth mark 1012 is located on the second circuit board 1003b where the external connector 1007 is located. The first mark 1010 marks the alignment pin position of the first connector 1002a; the second mark 1011 marks the alignment pin position of the second connector 1003a; the third mark 2006 marks the alignment pin position of the third connector 2002a; the fourth mark 3007 marks the alignment pin position of the fourth connector 3002a; and the fifth mark 1012 marks the alignment pin position of the external connector 1007. When the first connector 1002a and the third connector 2002a are plugged in, aligning the first mark 1010 and the third mark 2006 ensures correct plugging in. Similarly, when the second connector 1003a and the fourth connector 3002a are plugged in, aligning the second mark 1011 and the fourth mark 3007 ensures correct plugging in. Similarly, the fifth mark 1012 serves the same purpose. Therefore, each mark acts as a guide during connector mating, thereby ensuring the accuracy and reliability of the circuit connection.

[0131] In this embodiment, each mark can be a protrusion, groove, or color mark set on the corresponding reinforcing plate.

[0132] Please refer to Figure 16In this embodiment, the light-combining prism 400 includes a mirror body 4001, a first semi-reflective and semi-transparent film 4002, and a second semi-reflective and semi-transparent film 4003. The first semi-reflective and semi-transparent film 4002 and the second semi-reflective and semi-transparent film 4003 are alternately arranged on the mirror body 4001. The light emitted by the first display chip 1001a enters the interior of the light-combining prism 400 through the first light-incident surface 400b, passes through the first semi-reflective and semi-transparent film 4002 and the second semi-reflective and semi-transparent film 4003, and exits through the light-exiting surface 400a. The light emitted by the second display chip 2001a enters the interior of the light combining prism 400 after passing through the second light-incident surface 400c. Part of the light is reflected by the first semi-reflective membrane 4002, passes through the second semi-reflective membrane 4003, and exits through the light-exiting surface 400a. Another part of the light passes through the second semi-reflective membrane 4003, is reflected by the first semi-reflective membrane 4002, and exits through the light-exiting surface 400a. Similarly, the light emitted by the third display chip 3001a enters the interior of the light combining prism 400 after passing through the third light-incident surface 400d. Part of the light is reflected by the second semi-reflective membrane 4003, passes through the first semi-reflective membrane 4002, and exits through the light-exiting surface 400a. Another part of the light passes through the second semi-reflective membrane 4003, is reflected by the first semi-reflective membrane 4002, and exits through the light-exiting surface 400a.

[0133] Please continue to refer to this. Figure 16 In this embodiment, the light-combining prism 400 has a cuboid structure, such as a rectangular prism or a cube. For example, the light-combining prism 400 can be composed of four sub-prisms with triangular cross-sections. A sub-semi-reflective and semi-transparent membrane is attached to a preset surface of the four sub-prisms. When the four sub-prisms are spliced ​​together, the sub-semi-reflective and semi-transparent membranes are interconnected to form a first semi-reflective and semi-transparent membrane 4002 and a second semi-reflective and semi-transparent membrane 4003.

[0134] It should be noted that, in this embodiment, the first microdisplay panel 100, the second microdisplay panel 200, and the third microdisplay panel 300 all have very small volumes, with length and width dimensions between 500µm and 50000µm. Furthermore, the light-emitting areas of the first microdisplay panel 100, the second microdisplay panel 200, and the third microdisplay panel 300 are very small, such as 1mm×1mm, 2.64mm×2.02mm, 3mm×5mm, etc.

[0135] In this embodiment, the light-emitting areas of the first microdisplay panel 100, the second microdisplay panel 200, and the third microdisplay panel 300 include multiple micro-LED pixels arranged in an array. The specific pixel arrangement can be one of 320×240, 640×480, 1600×1200, 1920×1080, or 2560×1440. The size of a single micro-LED pixel is between 100 nm and 100 micrometers. For example, the size of a single micro-LED pixel is between 150 nm and 15 micrometers, or the size of a single micro-LED pixel can be less than 10 micrometers.

[0136] A driving backplane is disposed on the back of the micro-LED pixel array. The driving backplane is electrically connected to the micro-LEDs in the micro-LED pixel array. The driving backplane can acquire signals such as image data from the outside world and can control the corresponding micro-LEDs to emit light or not emit light. The driving backplane is a TFT (Thin Film Transistor) board or an IC (Integrated Circuit) board.

[0137] In this embodiment, the driving backplanes of the first microdisplay panel 100, the second microdisplay panel 200, and the third microdisplay panel 300 integrate a frame buffer, a column driving circuit, and a row driving circuit. The frame buffer includes a first pixel storage area, and the micro-LED pixel array includes a second pixel storage area. A complete frame of pixel grayscale data from the outside world can first enter the first pixel storage area of ​​the frame buffer. The column driving circuit can load the pixel grayscale data in the first pixel storage area of ​​the frame buffer into the second pixel storage area of ​​the micro-LED pixel array. The row driving circuit can scan the pixel grayscale data in the second pixel storage area and generate a pulse modulation signal to achieve the purpose of displaying different grayscale levels. When driving multiple micro-LED pixels in the micro-LED pixel array, either a single pixel can be driven independently, or multiple pixel units can be driven independently. The specific driving method should not constitute a limitation of this application.

[0138] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A light-combining device, comprising: A light-combining prism is used to mix light rays incident through multiple incident surfaces and exit through an exit surface. The light-combining prism includes multiple side surfaces, one of which serves as the exit surface and multiple of the other side surfaces serve as incident surfaces. The lens assembly includes a means for adjusting the light emitted from the combining prism; Its features are: The light-emitting surface of the light-combining prism is in direct contact with the lens assembly.

2. The light-combining device as described in claim 1, characterized in that, The optical center of the light-combining prism lies on the optical central axis of the lens assembly.

3. The light-combining device as described in claim 1, characterized in that, The light-emitting surface of the light-combining prism is connected to the lens assembly via a glue; the lens assembly includes a positioning frame at the rear end and a lens module, and the distance between the light-emitting surface of the light-combining prism and the lens in the lens module that is closest to the positioning frame is 0.30mm~0.40mm.

4. A micro-projection optical engine, characterized in that, include: The panel assembly and the light combining device as described in any one of claims 1 to 3; The panel assembly is adapted to enclose the light-combining device; The panel assembly includes a first microdisplay panel, a second microdisplay panel, and a third microdisplay panel, wherein the light-emitting portions of the first microdisplay panel, the second microdisplay panel, and the third microdisplay panel respectively mate with the three light-incident surfaces of the light-combining prism.

5. The micro-projection optical engine as described in claim 4, characterized in that, The length of the micro-projection optical engine is equivalent to the sum of the longitudinal dimension of the light-emitting portion of the first micro-display panel and the optical axis dimension of the lens assembly.

6. The micro-projection optical engine as described in claim 4, characterized in that, The first microdisplay panel includes: a first display section, a first connector section, a second connector section, and an external connector; the first display section corresponds to the first light-incident surface of the light-combining prism; the first connector section is used to transmit a driving signal to the second microdisplay panel; the second connector section is used to transmit a driving signal to the third microdisplay panel; and the external connector is used to receive driving signals that drive the first microdisplay panel, the second microdisplay panel, and the third microdisplay panel.

7. The micro-projection optical engine as described in claim 6, characterized in that, The first microdisplay panel further includes: a register for storing data; the external connector is also adapted to provide signals to the register to adjust the first microdisplay panel, the second microdisplay panel and the third microdisplay panel.

8. The micro-projection optical engine as described in claim 7, characterized in that, The temporary register is located side-by-side with the external connector on the same side.

9. The micro-projection optical engine as described in claim 4, characterized in that, The first microdisplay panel is used to generate blue light.

10. The micro-projection optical engine as described in claim 6, characterized in that, The second micro-display panel includes: a second display section and a third connector section; the second display section corresponds to the second light-incident surface of the light-combining prism; the first connector section and the third connector section are disposed on the non-light-incident side of the light-combining prism.

11. The micro-projection optical engine as described in claim 10, characterized in that, The end of the first display portion protrudes beyond the edge of the light-combining prism, creating a first support gap between the first connector portion and the light-combining prism; the third connector portion is electrically connected to the first connector portion, and the electrical connection position is located within the first support gap.

12. The micro-projection optical engine as described in claim 6, characterized in that, The third micro-display panel includes a third display section and a fourth connector section; the third display section corresponds to the third light-incident surface of the light-combining prism; the second connector section and the fourth connector section are disposed in cooperation on the third light-incident surface of the light-combining prism.

13. The micro-projection optical engine as described in claim 12, characterized in that, There is a second support gap between the second connector portion and the light combining prism, and the electrical connection position between the fourth connector portion and the second connector portion is located in the second support gap.

14. The micro-projection optical engine as described in claim 13, characterized in that, The third micro-display panel is located in the second support gap.

15. The micro-projection optical engine as described in claim 6, characterized in that, The first display section includes: a first display chip and a first reinforcing plate, wherein the first display chip is disposed on the first reinforcing plate; the first connector section includes: a first connector and a first circuit board, wherein the first connector is disposed on the first circuit board; the second connector section includes: a second connector and a second circuit board, wherein the second connector is disposed on the second circuit board; the external connector is disposed on the second circuit board, and the external connector and the second connector are located on opposite sides of the second circuit board.

16. The micro-projection optical engine as described in claim 4, characterized in that, Also includes: A protective frame is used to protect the uncovered sides or edges of the light-combining prism.

17. The micro-projection optical engine as described in claim 16, characterized in that, The protective frame includes a protective cover and a protective column assembly; the protective cover includes four sides; the protective column assembly includes a first protective column and a second protective column, the first protective column and the second protective column are respectively connected to the two ends of a first side of the protective cover, and the first protective column and the second protective column are perpendicular to the plane of the protective cover.

18. The micro-projection optical engine as described in claim 17, characterized in that, The first protective post and the second protective post are provided with limiting grooves near the edge of the light combining prism to accommodate the edge of the light combining prism.

19. The micro-projection optical engine as described in claim 16, characterized in that, The materials of the protective frame include metals or alloys.

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