Projection light machine and wearable device

Abstract

The embodiment of the present application provides a projection light machine and a wearable device. The projection light machine comprises a light machine main body, the light machine main body is provided with a mounting hole; a mounting seat is arranged in the mounting hole, the mounting seat is provided with a lens; a flexible circuit board is provided with a light emitting device, the flexible circuit board is mounted on the mounting seat, and the light emitting device of the flexible circuit board is arranged opposite to the lens of the mounting seat.

Description

Technical Field

[0001] This application relates to the field of optical product technology, and more specifically, to a projection optical engine and a wearable device. Background Technology

[0002] In projection optical engines, due to manufacturing and assembly errors, it is often necessary to adjust the position of optical components in order to achieve better light efficiency.

[0003] For example, in the optical design requirements of optical engines, the tolerance requirements between LED light sources and C1 collimating lenses are extremely strict. The eccentricity or tilt between LED light sources and C1 collimating lenses will seriously affect the light utilization rate of LEDs, thereby affecting the brightness performance and heat dissipation effect of the entire optical engine system.

[0004] In view of this, a new technical solution is needed to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this application is to provide a new technical solution for a projection optical engine and a wearable device.

[0006] In a first aspect, this application provides a projection optical engine. The projection optical engine includes:

[0007] The optical engine body has mounting holes.

[0008] Mounting base, the mounting base is disposed in the mounting hole, and the mounting base is provided with a lens;

[0009] A flexible circuit board, wherein a light-emitting device is disposed on the flexible circuit board, the flexible circuit board is mounted on the mounting base, and the light-emitting device of the flexible circuit board is disposed opposite to the lens of the mounting base.

[0010] Optionally, the flexible circuit board is provided with two light-emitting devices, including a first light-emitting device and a second light-emitting device. The flexible circuit board is disposed on the mounting base. The first light-emitting device and the lens are disposed opposite each other, and the second light-emitting device and the lens are disposed opposite each other.

[0011] Optionally, the mounting hole includes a first mounting hole and a second mounting hole;

[0012] The mounting base includes a first mounting base and a second mounting base, wherein the first mounting base is disposed in the first mounting hole and the second mounting base is disposed in the second mounting hole;

[0013] The flexible circuit board is disposed on the first mounting base and the second mounting base, with the first light-emitting device and the lens facing each other, and the second light-emitting device and the lens facing each other.

[0014] Optionally, the mounting base includes a frame having a reference hole, the wall of the reference hole having a support portion, and the lens being mounted on the support portion.

[0015] Optionally, the flexible circuit board includes a connecting portion, a first arm, and a second arm, wherein the first arm and the second arm are both connected to the connecting portion and the three are integrally formed.

[0016] The first arm is provided with the first light-emitting device, and the first arm is disposed on the first mounting base;

[0017] The second arm is provided with the second light-emitting device, and the second arm is disposed on the second mounting base.

[0018] Optionally, the optical engine body includes a first panel and a second panel, the first panel and the second panel are connected and arranged adjacent to each other, the first panel has a first mounting hole, and the second panel has a second mounting hole;

[0019] When the first mounting base is disposed in the first mounting hole and the second mounting base is disposed in the second mounting hole, the connecting portion is disposed at the connection between the first panel and the second panel.

[0020] Optionally, the flexible circuit board further includes a third arm, which is connected to and integrally formed with the connecting portion; the third arm is disposed on the optomechanical body.

[0021] The third arm has a first connector on the side opposite to the main body of the optical engine.

[0022] Optionally, the projection optical engine further includes: a first adapter portion, which is connected to the first connector and extends toward a first direction.

[0023] Optionally, the projection optical engine further includes a display panel and a second adapter, wherein the display panel is disposed on the main body of the optical engine and is located on one side of the second adapter;

[0024] The second adapter is connected to the display panel, and the second adapter extends in the same direction as the first adapter.

[0025] Optionally, the display panel is an LCOS display panel.

[0026] Optionally, the projection optical engine further includes a polarizing beam splitter prism, which is disposed inside the optical engine body via a support portion;

[0027] The optical engine body also includes a first panel, and the third panel corresponds to the polarizing beam splitter. The third panel has three through holes for measuring the gap between the polarizing beam splitter and the support part.

[0028] Optionally, a light-shielding sheet is provided on the surface of the third panel opposite to the polarizing beam splitter, and the light-shielding sheet covers the three through holes.

[0029] Secondly, embodiments of this application provide a wearable device. The wearable device includes a projection optical engine as described in the first aspect.

[0030] According to an embodiment of this application, a projection optical engine is provided. By mounting both the light-emitting device and the lens in the reference hole of the mounting base, high-precision assembly between the light-emitting device and the lens is achieved. Furthermore, by mounting the mounting base in the mounting hole of the projection optical engine, high brightness transmission of the projection optical engine is ensured, the impact of ineffective light transmission is reduced, and the heat dissipation effect inside the projection optical engine is improved.

[0031] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0033] Figure 1 The diagram shown is an exploded view of the projection optical engine provided in an embodiment of this application.

[0034] Figure 2 The diagram shown is a structural diagram of the projection optical engine provided in an embodiment of this application (without an adapter).

[0035] Figure 3 The image shown is a structural view of a projection optical engine provided in an embodiment of this application (with a connecting part).

[0036] Figure 4 The diagram shown is a structural diagram of the flexible circuit board provided in an embodiment of this application.

[0037] Figure 5 The image shown is a structural view of the projection optical engine provided in an embodiment of this application from another direction (with a connecting part).

[0038] Figure 6 The diagram shows the power transmission and heat dissipation in a flexible circuit board.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Optical engine body; 10. Mounting hole; 101. First mounting hole; 102. Second mounting hole; 11. First panel; 12. Second panel; 13. Third panel; 131. Through hole;

[0041] 2. Mounting base; 21. First mounting base; 22. Second mounting base;

[0042] 3. Lens; 31. First lens; 32. Second lens;

[0043] 4. Flexible circuit board; 40. Connecting part; 41. First arm; 42. Second arm; 43. Third arm;

[0044] 5. Light-emitting device; 51. First light-emitting device; 52. Second light-emitting device;

[0045] 61. First connector; 62. First adapter;

[0046] 7. Display panel; 71. Second adapter;

[0047] 8. Light-blocking sheet. Detailed Implementation

[0048] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0049] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0050] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0051] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0052] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0053] This application provides a projection optical engine. (Refer to...) Figures 1-6The projection optical engine includes: an optical engine body 1, which has a mounting hole 10; a mounting base 2, which is disposed within the mounting hole 10 and has a lens 3; and a flexible circuit board 4, on which a light-emitting device 5 is disposed, which is mounted on the mounting base 2, with the light-emitting device 5 on the flexible circuit board facing the lens 3 of the mounting base 2.

[0054] In this embodiment, the projection optical engine includes an optical engine body 1, which carries the optical components of the projection optical engine and a mounting base 2. For example, a cavity is formed inside the optical engine body 1, and the optical components are installed inside the cavity. For example, the optical engine body 1 has a mounting hole 10, and the mounting base 2 is installed in the mounting hole 10.

[0055] The projection engine also includes a mounting base 2 and a flexible circuit board 4. The mounting base 2 is equipped with a lens 3 (the lens 3 can be a C1 collimating lens 3). In an optional embodiment, a reference hole can be formed in the mounting base 2, for example, the lens 3 is embedded in the reference hole of the mounting base 2. A light-emitting device 5 (the light-emitting device 5 can be an LED) is provided on the flexible circuit board 4, for example, the light-emitting device 5 and the flexible circuit board 4 are integrally formed.

[0056] When the flexible circuit board 4 is mounted on the mounting base 2, the light-emitting device 5 is also mounted on the mounting base 2, and the light-emitting device 5 and the lens 3 are positioned opposite each other. Since both the light-emitting device 5 and the lens 3 are mounted on the mounting base 2, the assembly precision between the light-emitting device 5 and the lens 3 is achieved through visual assembly. The assembled mounting base 2 (i.e., both the lens 3 and the flexible circuit board 4 are mounted on the mounting base 2) is positioned and assembled through the mounting holes 10 opened on the mounting base 2 and the optical engine body 1, which solves the problem of eccentricity and tilt between the light-emitting device 5 and the lens 3, improves the light utilization rate of the light-emitting device 5, and thus improves the brightness performance and heat dissipation effect of the entire projection optical engine (for example, when the light-emitting device 5 and the lens 3 are eccentric or tilted, more ineffective light will be generated inside the projection optical engine, affecting the heat dissipation effect of the projection optical engine).

[0057] In one specific embodiment, the optical design requirements for the projection optical engine impose extremely strict tolerance requirements on the LED light source and the C1 collimating lens (while the positional tolerances of filters, compound eyes, and other lenses in the illumination system are relatively large and do not significantly affect the brightness performance of the projection optical engine). Therefore, when the light-emitting device 5 is an LED light source and the lens 3 is a C1 collimating lens, both the LED light source and the C1 collimating lens are positioned on the mounting base 2, thus limiting the distance between the LED light source and the C1 collimating lens in the X, Y, and Z directions (e.g., the X and Y directions). The structure defines the offset and rotation of the surface of lens 3 (with the Z-direction being the thickness direction of lens 3), and includes a mounting hole 10 on the optical engine body 1 and the assembled mounting base 2 installed in the mounting hole 10. The mounting base 2 is an axial structure relative to the mounting hole 10, and the insertion-type hole-axis structure limits the offset of the mounting base 2 in the X and Y directions. The offset and rotation of the mounting base 2 in the Z-direction are limited by the contact and bearing between the outer surface of the mounting base 2 and the inner wall of the mounting hole 10 of the optical engine body 1 (the interior of the mounting hole 10 is the bearing surface of the mounting base 2). In summary, by mounting both the LED light source and the C1 collimating lens on the mounting base 2, high-precision assembly between the LED light source and the C1 collimating lens is achieved. Furthermore, by installing the mounting base 2 within the mounting hole 10 of the projection optical engine, high brightness transmission of the projection optical engine is ensured.

[0058] Therefore, in this embodiment of the application, a projection optical engine is provided. By mounting the light-emitting device 5 and the lens 3 on the mounting base 2, high-precision assembly between the light-emitting device 5 and the lens 3 is achieved. Furthermore, by installing the mounting base 2 into the mounting hole 10 of the projection optical engine, high brightness transmission of the projection optical engine is ensured, the impact of invalid light transmission is reduced, and the heat dissipation effect inside the projection optical engine is improved.

[0059] In one embodiment, refer to Figure 1 The flexible circuit board 4 is provided with two light-emitting devices, the two light-emitting devices 5 including a first light-emitting device 51 and a second light-emitting device 52. The flexible circuit board 4 is disposed on the mounting base 2. The first light-emitting device 51 and the lens are disposed opposite each other, and the second light-emitting device 52 and the lens are disposed opposite each other.

[0060] In this embodiment, two light-emitting devices are disposed on the flexible circuit board, specifically a first light-emitting device 51 and a second light-emitting device 52, realizing a dual-channel LED design. For example, the first light-emitting device 51 can be an RB-LED and the second light-emitting device 52 can be a G-LED; or the second light-emitting device 52 can be a G-LED and the second light-emitting device 52 can be an RB-LED.

[0061] In addition, by placing the flexible circuit board 4 on the mounting base 2, and placing both light-emitting devices and the lens on the mounting base, with both light-emitting devices facing the lens, high-precision assembly of the two light-emitting devices and the lens is achieved.

[0062] In one specific embodiment, refer to Figure 1 The mounting hole 10 includes a first mounting hole 101 and a second mounting hole 102. The mounting base 2 includes a first mounting base 21 and a second mounting base 22, wherein the first mounting base 21 is disposed within the first mounting hole 101 and the second mounting base 22 is disposed within the second mounting hole 102.

[0063] The light-emitting device 5 includes a first light-emitting device 51 and a second light-emitting device 52. The flexible circuit board 4 is disposed on the first mounting base 21 and the second mounting base 22. The first light-emitting device 51 is opposite to the lens, and the second light-emitting device 52 is opposite to the lens.

[0064] In this embodiment, the main features are defined as follows: two mounting holes and two mounting bases, with the mounting bases correspondingly disposed within the mounting area; and when there are two mounting bases, the flexible circuit board is simultaneously mounted on both mounting bases. Specifically, a dual-channel projection optical engine is provided. Through the overall structural scheme of the optical engine body 1 and the dual mounting bases 2, a full-color dual-channel projection optical engine with a medium brightness of 4.9lm@0.56W is provided while ensuring the compactness and aesthetics of the overall structure of the projection optical engine.

[0065] Specifically, the light-emitting device 5 includes a first light-emitting device 51 and a second light-emitting device 52. For example, the first light-emitting device 51 can be an RB-LED and the second light-emitting device 52 can be a G-LED; or the second light-emitting device 52 can be a G-LED and the second light-emitting device 52 can be an RB-LED. This embodiment is illustrated by using an RB-LED as the first light-emitting device 51 and a G-LED as the second light-emitting device 52.

[0066] The RB-LED and flexible circuit board 4 are integrated into one structure, and the G-LED is electrically connected to the flexible circuit board 4 and is also integrated into the flexible circuit board 4. When both the RB-LED and G-LED are electrically connected to the flexible circuit board 4, the flexible circuit board 4 is disposed on the first mounting base 21 and the second mounting base 22. This serves two purposes: firstly, to mount the RB-LED on the first mounting base 21 and position it opposite to the lens 3; and secondly, to mount the G-LED on the second mounting base 22 and position it opposite to the lens 3. In a specific embodiment, a first lens 31 is disposed on the first mounting base 21, and a second lens 32 is disposed on the second mounting base 21. With the flexible circuit board 4 disposed on the first mounting base 21 and the second mounting base 22, the first light-emitting device 51 can be positioned opposite to the first lens 31, and the second light-emitting device 52 can be positioned opposite to the second lens 32.

[0067] On the other hand, the first mounting base 21 and the second mounting base 22, which were originally set separately, can be integrated together by the flexible circuit board 4, so that the first mounting base 21 and the second mounting base 22 are integrated into a whole by the flexible circuit board 4, and then the whole is correspondingly mounted on the optical engine body 1. Specifically, the whole is correspondingly mounted on the optical engine body 1, that is, the first mounting base 21 is correspondingly disposed in the first mounting hole 101, and the second mounting base 22 is correspondingly disposed in the second mounting hole 102.

[0068] Therefore, in this embodiment, by mounting the first light-emitting device 51 and the lens on the first mounting base 21, high-precision assembly between the first light-emitting device 51 and the lens 3 is achieved; by mounting the second light-emitting device 52 and the lens 3 on the second mounting base 22, high-precision assembly between the second light-emitting device 52 and the lens 3 is achieved; and by integrating the first mounting base 21 and the second mounting base 22 into a whole by means of the flexible circuit board 4, which is correspondingly installed in the first mounting hole 101 and the second mounting hole 102 on the optical engine body 1, high brightness transmission of the projection optical engine is ensured.

[0069] In one embodiment, refer to Figure 1 The mounting base 2 includes a frame with a reference hole, the wall of the reference hole having a support portion, and the lens 3 is mounted on the support portion.

[0070] In this embodiment, the mounting base 2 is a frame structure with a reference hole, which can be a circular hole or a square hole, etc. A support part is provided on the wall of the reference hole. For example, the support part can be a slot or other structure that plays a connecting role (for example, it can be a magnetic structure). The lens 3 is mounted on the mounting base 2 through the support part.

[0071] Specifically, the lens 3 is positioned within the reference hole via a support portion. When the lens 3 is positioned within the reference hole, space remains within the reference hole to accommodate the light-emitting device 5. When the flexible circuit board 4 is mounted on the mounting base 2, the light-emitting device 5 on the flexible circuit board 4 can be placed within the reference hole and positioned opposite to the lens 3, thereby improving the assembly accuracy between the lens 3 and the light-emitting device 5.

[0072] Optionally, the flexible circuit board 4 can be mounted on the mounting base 2 by means of bonding or other methods. For example, the mounting base 2 is a frame structure, and the flexible circuit board 4 is bonded to one surface of the frame, so that the light-emitting device 5 can be placed exactly in the reference hole and positioned opposite the lens 3. Alternatively, to improve the mounting strength between the light-emitting device 5 and the reference hole, a support part can be provided on the hole wall of the reference hole of the mounting base 2, and the light-emitting device 5 can be mounted on the corresponding support part.

[0073] In one embodiment, refer to Figure 1 , Figure 2 and Figure 4 The flexible circuit board 4 includes a connecting part 40, a first support arm 41 and a second support arm 42, both of which are connected to the connecting part 40 and are integrally formed.

[0074] The first support arm 41 is provided with the first light-emitting device 51 and is disposed on the first mounting base 21; the second support arm 42 is provided with the second light-emitting device 52 and is disposed on the second mounting base 22.

[0075] In this embodiment, the flexible circuit board 4 includes a connecting part 40, a first support arm 41, and a second support arm 42. The first support arm 41 and the second support arm 42 are integrally connected to the connecting part 40. When the first support arm 41 is disposed on the first mounting base 21, the first light-emitting device 51 is disposed opposite to the first lens 31. When the second support arm 42 is disposed on the second mounting base 22, the second light-emitting device 52 is disposed opposite to the second lens 32.

[0076] Since the first arm 41 and the second arm 42 are connected together by the connecting part 40, when the first arm 41 is disposed on the first mounting base 21 and the second arm 42 is disposed on the second mounting base 22, the first mounting base 21 and the second mounting base 22 are integrated into a single structure through the first arm 41, the connecting part 40 and the second arm 42. The first mounting base 21 and the second mounting base 22 are integrated together through the first arm 41, the connecting part 40 and the second arm 42 so that the integrated single structure can be correspondingly disposed on the optomechanical body 1.

[0077] In one embodiment, refer to Figure 1 and Figure 2The optical engine body 1 includes a first panel 11 and a second panel 12. The first panel 11 and the second panel 12 are connected and arranged adjacent to each other. The first panel 11 has a first mounting hole 101 and the second panel 12 has a second mounting hole.

[0078] When the first mounting base 21 is disposed in the first mounting hole 101 and the second mounting base 22 is disposed in the second mounting hole 102, the connecting part 40 is disposed at the connection between the first panel 11 and the second panel 12.

[0079] In this embodiment, the optical engine body 1 is formed by multiple panels, such as multiple panels enclosing each other to form a cavity for accommodating optical components. The optical engine body 1 includes a first panel 11 and a second panel 12, which are connected and arranged adjacent to each other. When a first mounting hole 101 is opened in the first panel 11 and a second mounting hole 102 is opened in the second panel 12, the first mounting base 21 and the second mounting base 22 are integrated together to form an integral structure through the first support arm 41, the connecting part 40, and the second support arm 42. This integral structure is installed on the optical engine body 1, with the first mounting base 21 cooperating with the first mounting hole 101 and the second mounting base 22 cooperating with the second mounting hole 102. At this time, the connecting part 40 is provided at the connection between the first panel 11 and the second panel 12, making the overall structure of the projection optical engine more compact.

[0080] In one embodiment, refer to Figure 1 , Figure 2 and Figure 4 The flexible circuit board 4 further includes a third arm 43, which is connected to and integrally formed with the connecting part 40; the third arm 43 is disposed on the optical engine body 1; a first connector 61 is disposed on the side of the third arm 43 away from the optical engine body 1.

[0081] In this embodiment, the flexible circuit board 4 also includes a third arm 43. Therefore, in this embodiment, the flexible circuit board 4 includes a connecting portion 40, a first arm 41, a second arm 42, and a third arm 43, all of which are integrally formed, making the overall structure of the flexible circuit board 4 T-shaped. Therefore, in this embodiment, to make the overall structure of the dual-channel projection optical engine more compact and occupy less space when connected to external hardware devices, a "T"-shaped flexible circuit board 4 is provided. The G-LED (second light-emitting device 52) and RB-LED (first light-emitting device 51) are connected to the first arm 41 and the second arm 42 of the flexible circuit board 4 respectively using SMT technology, and the first connector 61 is connected to the third arm 43 of the flexible circuit board 4 using SMT technology. Various electronic components such as capacitors and resistors are also soldered to the flexible circuit board 4. Additionally, as... Figure 6 The diagram shows a schematic representation of the power transmission and heat dissipation directions of the flexible circuit board 4. (Refer to...) Figure 6 The flexible circuit board 4 adopts a "T" shaped structure, which can transmit power to the RB-LED (first light-emitting device 51) and G-LED (second light-emitting device 52) respectively when power is supplied, avoiding the crossover of power transmission between the two light-emitting devices 5. Furthermore, the RB-LED (first light-emitting device 51) and G-LED (second light-emitting device 52) can be designed for heat dissipation separately, which greatly reduces the difficulty of heat dissipation design of the projection optical engine, meets the heat dissipation requirements of the projection optical engine, and thus reduces the impact of thermal defocusing on the projection optical engine, enhancing the stability of the projection optical engine performance.

[0082] It should be noted that in this embodiment, the third arm 43 is specifically defined as being connected to the connecting part 40, and the connection position of the third arm 43 includes, but is not limited to, this connection position. For example, the third arm 43 can also be connected to the second arm 42, so that the third arm 43, the second arm 42, the connecting part 40 and the first arm 41 form a T-shaped structure; or the third arm 43 can also be connected to the first arm 41, so that the third arm 43, the second arm 42, the connecting part 40 and the first arm 41 form a T-shaped structure.

[0083] It should also be noted that, in this embodiment, the flexible circuit board includes a connecting portion, and the first arm 41 and the second arm 42 are connected together through the connecting portion 40. The structure of the flexible circuit board includes, but is not limited to, this structure. For example, the flexible circuit board may also exclude the connecting portion, and the first arm 41 and the second arm 42 are directly connected together. In this case, the third arm 43 can be connected to the second arm 42, so that the third arm 43, the second arm 42 and the first arm 41 form a T-shaped structure; or the third arm 43 can be connected to the first arm 41, so that the third arm 43, the second arm 42 and the first arm 41 form a T-shaped structure.

[0084] In one embodiment, refer to Figure 3 and Figure 5 The projection optical engine further includes a first adapter 62, which is connected to the first connector 61 and extends toward a first direction.

[0085] In this implementation, the projection optical engine also includes a first adapter 62, which is electrically connected to a first connector 61. For example, the first adapter 62 can be connected to an external device to transmit signals or electrical energy. When the first adapter 62 is connected to the first connector 61, the first adapter 62 extends in a first direction, for example, the length direction of the optical engine body 1. For example, the first adapter 62 can be an LED adapter cable.

[0086] In one embodiment, refer to Figure 3 and Figure 5 The projection optical engine also includes a display panel 7 and a second adapter 71. The display panel 7 is disposed on the optical engine body 1 and is located on one side of the second adapter 71.

[0087] The second adapter 71 is connected to the display panel 7, and the second adapter 71 extends in the same direction as the first adapter 62.

[0088] In this embodiment, the projection optical engine also includes a display panel 7, which can image the picture on the display panel 7 through the optical components in the projection optical engine. The display panel 7 also includes a circuit board, which is electrically connected to the circuit board in the display panel 7 through a second adapter 71. When the second adapter 71 is electrically connected to the circuit board, the extension direction of the second adapter 71 is consistent with the connection direction of the first adapter 62. Specifically, combined with the "T"-shaped design of the flexible circuit board 4, the projection optical engine and all adapters can be concentrated on one side of the display panel 7, resulting in a compact structure, and all adapters do not require any bending.

[0089] In one embodiment, the display panel 7 is an LCOS display panel 7.

[0090] In this embodiment, the display panel 7 is defined as an LCOS display panel 7. Based on LCOS microdisplay technology, combined with the structure of the optical engine body 1, the mounting base 2 and the flexible circuit board 4, a full-color dual-channel optical engine with a volume of 1.4cc, a weight as low as 2.6g, a brightness of 4.9lm@0.56W (LED+LCOS), and an FOV of 28° can be provided.

[0091] In one embodiment, refer to Figure 1 and Figure 2The projection optical engine also includes a polarizing beam splitter (not shown in the figure), which is disposed inside the optical engine body 1 via a support portion.

[0092] The optical engine body 1 also includes a third panel 13, which corresponds to the polarizing beam splitter. The third panel 13 has three through holes 131, through which the gap between the polarizing beam splitter and the support part is measured.

[0093] In this embodiment, the projection optical engine also includes a polarizing beam splitter prism, which is disposed inside the optical engine body 1 via a support portion, such as a slot or similar structure.

[0094] The projection engine also includes a third panel 13, on which three through holes 131 are formed. These three through holes 131 are actually observation holes. The positions of the three through holes 131 are relative to the support structure of the polarizing beam splitter. After assembly, the gap between the polarizing beam splitter and the reference support surface can be measured by three-dimensional projection, allowing for a direct evaluation of the assembly accuracy of the polarizing beam splitter. If the assembly accuracy of the polarizing beam splitter does not meet the requirements, the installation position of the polarizing beam splitter is adjusted, and the assembly accuracy of the polarizing beam splitter is measured again by three-dimensional projection.

[0095] In one embodiment, refer to Figure 1 and Figure 2 A light-shielding sheet 8 is provided on the surface of the third panel 13 facing away from the polarizing beam splitter, and the light-shielding sheet 8 covers the three through holes 131.

[0096] In this embodiment, after the polarizing beam splitter passes inspection, a light-shielding sheet 8 is attached to the third panel 13 for light-shielding and sealing treatment. For example, the light-shielding sheet 8 can be a Mylar film.

[0097] According to a second aspect of this application, a wearable device is provided. The wearable device includes the projection optical engine described above. For example, the wearable device can be AR glasses, etc.

[0098] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0099] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A projection optical engine, characterized in that, The projection optical engine includes: The optical engine body (1) has a first mounting hole (101) and a second mounting hole (102), and the axis of the first mounting hole (101) and the axis of the second mounting hole (102) intersect. A first mounting base (21) and a second mounting base (22). The first mounting base (21) is disposed in the first mounting hole (101) and is provided with a lens (3). The second mounting base (22) is disposed in the second mounting hole (102) and is also provided with a lens (3). The flexible circuit board (4) includes a connecting part (40), a first arm (41) and a second arm (42). The first arm (41) and the second arm (42) are both connected to the connecting part (40) and the three are integrally formed. The connecting part (40) is disposed between the first mounting base (21) and the second mounting base (22). The first arm (41) is provided with a first light-emitting device (51); the second arm (42) is provided with a second light-emitting device (52), and each light-emitting device and its corresponding lens are arranged opposite to each other; Furthermore, the flexible circuit board (4) also includes a third arm (43), which is connected to the connecting part (40) and integrally formed with the connecting part (40); the third arm (43) is disposed on the optical engine body (1); The third arm (43) is provided with a first connector (61) on the side away from the optical engine body (1). The first connector (61) is connected to the first light-emitting device (51) and the first connector (61) is connected to the second light-emitting device (52).

2. The projection optical engine according to claim 1, characterized in that, The mounting base (2) includes a frame having a reference hole, the wall of the reference hole having a support portion, and the lens (3) is mounted on the support portion.

3. The projection optical engine according to claim 1, characterized in that, The optical engine body (1) includes a first panel (11) and a second panel (12), the first panel (11) and the second panel (12) are connected and arranged adjacent to each other, the first panel (11) has a first mounting hole (101), and the second panel (12) has a second mounting hole; When the first mounting base (21) is disposed in the first mounting hole (101) and the second mounting base (22) is disposed in the second mounting hole (102), the connecting part (40) of the flexible circuit board (4) is disposed at the connection between the first panel (11) and the second panel (12).

4. The projection optical engine according to claim 1, characterized in that, The projection optical engine further includes: a first adapter (62), which is connected to the first connector (61), and the first adapter (62) extends toward a first direction.

5. The projection optical engine according to claim 4, characterized in that, The projection optical engine also includes a display panel (7) and a second adapter (71). The display panel (7) is disposed on the optical engine body (1) and located on one side of the second adapter (71). The second adapter (71) is connected to the display panel (7), and the second adapter (71) extends in the same direction as the first adapter (62).

6. The projection optical engine according to claim 5, characterized in that, The display panel (7) is an LCOS display panel (7).

7. The projection optical engine according to claim 1, characterized in that, The projection optical engine also includes a polarizing beam splitter, which is disposed inside the main body (1) of the optical engine via a support portion; The optical engine body (1) also includes a third panel (13), which corresponds to the polarizing beam splitter. The third panel (13) has three through holes (131) for measuring the gap between the polarizing beam splitter and the support part.

8. The projection optical engine according to claim 7, characterized in that, A light-shielding sheet (8) is provided on the surface of the third panel (13) facing away from the polarizing beam splitter, and the light-shielding sheet (8) covers the three through holes (131).

9. A wearable device, characterized in that, The wearable device includes a projection optical engine as described in any one of claims 1-8.

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