Optical displays and means of transport

Abstract

The present application provides an optical display and a transportation means. The optical display includes a housing, a light source unit, a transmission reflection type optical element, and a curved mirror. The housing is provided with a first opening. The light source unit is fixed to the housing and configured to emit imaging light. The transmission reflection type optical element is fixed to the housing, covers the first opening, and is configured to transmit and reflect the imaging light. The curved mirror is fixed to the housing and configured to reflect the imaging light. The imaging light emitted by the light source unit is reflected to the curved mirror through the transmission reflection type optical element, and the curved mirror transmits the imaging light to the outside of the housing through the transmission reflection type optical element. Since the light source unit, the transmission reflection type optical element, and the curved mirror are directly fixed to the same housing, the number of parts of the optical display is reduced, the difficulty of assembling the optical display is reduced, the assembly accuracy of the optical display is improved, and the structure of the optical display is simplified. This can further improve the accuracy of the optical path system of the optical display.

Description

Technical Field

[0001] This application claims the priority of Chinese Patent Application No. 202210469117.9, titled "OPTICAL DISPLAY AND TRANSPORT MEANS", filed with the China National Intellectual Property Administration on April 29, 2022, the entire content of which is incorporated herein by reference.

[0002] This application relates to the field of optical display technology, particularly to optical displays and transport means.

Background Art

[0003] An optical display is a device that uses the principle of optical imaging to obtain a large-screen visual experience in a small space, and can be widely used in projectors, head-up displays (HUDs), in-vehicle displays, vehicle lights, etc.

[0004] In a commonly used optical display, optical elements such as a light source unit and a curved mirror are first attached to their respective frame bodies, and then the frame bodies are fixed to the housing using the frame bodies. Such an intermediate connection impairs the accuracy of the optical path system of the optical display.

Summary of the Invention

[0005] Embodiments of this application provide an optical display and transport means that can improve the accuracy of the optical path system.

[0006] According to a first aspect, the present invention provides an optical display comprising a housing, a light source unit, a transmissive-reflection optical element, and a curved mirror. The housing is provided with a first opening. The light source unit is fixed to the housing and configured to emit imaging light. The transmissive-reflection optical element is fixed to the housing, covers the first opening, and is configured to transmit and reflect imaging light. The curved mirror is fixed to the housing and is configured to reflect imaging light. The imaging light emitted from the light source unit is reflected by the curved mirror via the transmissive-reflection optical element, and the curved mirror transmits the incident imaging light through the transmissive-reflection optical element to the outside of the housing.

[0007] There are assembly tolerances between components. As the number of components in an optical display increases, assembly accuracy may decrease. Assembly accuracy affects the accuracy of the optical path system in the optical display.

[0008] In this invention, the light source unit, the transmissive reflective optical element, and the curved mirror are each directly fixed to the same housing without the use of separate adapters (e.g., separate fixing frames), thereby reducing the number of elements in the optical display, lowering the difficulty of assembling the optical display, improving the assembly accuracy of the optical display, and simplifying the structure of the optical display. This further improves the accuracy of the optical path system of the optical display and helps to improve the output quality of the imaging light of the optical display.

[0009] According to a first aspect, in possible embodiments, the housing includes a main housing and a mounting portion. A first opening is provided in the main housing, and both the light source unit and the curved mirror are fixed to the main housing. The mounting portion protrudes from the outer surface of the main housing. A transmissive reflective optical element is fixedly connected to the mounting portion and is located outside the main housing.

[0010] The internal optical path of the optical display is located within the internal cavity of the main housing, and the mounting parts for fixing the transmissive reflective optical elements are located on the outside of the main housing, so that the mounting parts do not affect the internal optical path of the optical display. In other words, the mounting parts do not affect the transmission of imaging light within the main housing, thereby reducing the generation of reflected stray light in the optical display and improving the output quality of the imaging light of the optical display.

[0011] According to a first aspect, in possible embodiments, the mounting portion includes a mounting bottom wall and a protective flange. The mounting bottom wall protrudes from the outside of the main housing and is positioned along the peripheral contour of the first opening. The transmissive reflective optical element is fixed to the mounting bottom wall. The protective flange protrudes from the mounting bottom wall and surrounds at least a portion of the edge of the transmissive reflective optical element.

[0012] The protective flange surrounds the edges of the transmissive reflective optical element, protecting it, reducing the likelihood of scratching or damaging it, and extending its service life.

[0013] Furthermore, when a transmissive reflective optical element is made of transmissive reflective glass, its edges are usually sharp. By using a protective flange to surround at least a portion of the edges of the transmissive reflective optical element, the possibility of users being scratched or cut by the edges of the transmissive reflective optical element can be reduced, thereby improving the safety and reliability of the optical display.

[0014] According to the first aspect, in a possible embodiment, the mounting surface is positioned on the mounting bottom wall and is positioned parallel to the transmissive reflective optical element.

[0015] The mounting surface is positioned parallel to the transmissive reflective optical element, and the position of the mounting surface corresponds to the position of the transmissive reflective optical element in the optical path of the optical display. In the process of assembling the transmissive reflective optical element and the housing, the mounting surface can position the transmissive reflective optical element in the direction normal to the mounting surface, thereby improving the positioning accuracy of the transmissive reflective optical element using the housing and improving the output quality of imaging light in the optical display.

[0016] According to the first aspect, in a possible embodiment, the mounting surface is positioned on a housing. The housing further includes a fixed post, which protrudes from the mounting surface. The light source unit includes a connected light-emitting region and a non-light-emitting region. The light-emitting region is configured to emit imaging light, and the light source unit of the non-light-emitting region is fixedly connected to the fixed post.

[0017] The light source unit in the non-emitting region is fixedly connected to a fixed post. The fixed post is fixed to the light source unit in the non-emitting region and can pass through the light source unit in the non-emitting region. Alternatively, fasteners such as screws may sequentially pass through the light source unit in the non-emitting region and the fixed post. The fasteners are fixedly connected to the fixed post, thereby fixing the light source unit to the fixed post. The light source unit and the mounting surface may be placed close to each other or spaced apart.

[0018] Because the light source unit is fixedly connected to the fixed post via a non-emitting region, the output of the imaging light from the light source unit is unaffected, and the stability of the connection between the light source unit and the housing is improved.

[0019] According to the first aspect, in possible embodiments, a positioning hole is provided in the non-emitting region. The housing further includes a light source positioning post protruding from the mounting surface, the light source positioning post passing through the positioning hole to position the light source unit.

[0020] According to the first aspect, in possible embodiments, the positioning hole includes a first positioning hole and a second positioning hole. The light source positioning post includes a first light source positioning post and a second light source positioning post. The first light source positioning post penetrates the first positioning hole, and the second light source positioning post penetrates the second positioning hole. In the direction of alignment of the first and second positioning holes, the length of the second positioning hole is longer than the length of the first positioning hole.

[0021] In an ideal state, the shape of the positioning hole matches the shape of the light source positioning post, and the set spacing (design spacing) between the two positioning holes is the same as the set spacing between the two light source positioning posts. For example, the positioning hole is circular and the light source positioning post is cylindrical. However, in reality, due to unavoidable manufacturing tolerances, there is a discrepancy between the actual spacing between the two light source positioning posts and the set spacing. In this case, the light source positioning post of the light source unit may not be positioned in the corresponding positioning hole.

[0022] In this invention, in the alignment direction of the first and second positioning holes, the length of the first positioning hole is longer than the length of the second positioning hole, ensuring an assembly margin when assembling the light source unit to the housing through the first positioning hole. In other words, even if there is a difference between the actual distance between the first and second light source positioning posts and the set distance, the light source unit can still be assembled to the housing. For example, even if the actual distance between the first and second light source positioning posts is greater than the set distance, the first light source positioning post can still be attached to the first positioning hole, and the second light source positioning post can still be attached to the second positioning hole. In this way, the requirements for manufacturing precision and manufacturing costs of the housing and optical display are reduced.

[0023] According to the first aspect, in a possible embodiment, the light source unit is positioned parallel to the mounting surface.

[0024] The installation surface is arranged parallel to the light source unit, and the position of the installation surface corresponds to the position of the light source unit in the optical path of the optical display. In the process of assembling the light source unit and the housing, the installation surface can position the light source unit in the normal direction of the installation surface, so the positioning accuracy of the light source unit using the housing is improved, and the output quality of the imaging light in the optical display is improved.

[0025] According to the first aspect, in a possible embodiment, the positioning surface is arranged on the housing, and the curved mirror is fixedly connected to the positioning surface.

[0026] The curved mirror includes a mirror body and a connecting portion protruding from the mirror body, and the connecting portion and the positioning surface are attached to each other and fixedly connected.

[0027] The connecting portion protruding from the mirror can also be called a "mounting ear". In the process of assembling the curved mirror and the housing, the positioning surface positions the curved mirror in the normal direction of the positioning surface, and the positioning post can position the connecting portion. Thereby, the assembly accuracy and assembly efficiency of the optical display are improved, and the assembly of the curved mirror and the housing becomes easy.

[0028] According to the first aspect, in a possible embodiment, the mirror body includes a first edge, a second edge, a third edge, and a fourth edge. The first edge and the second edge are arranged opposite to each other in the first direction. The third edge and the fourth edge are arranged opposite to each other. The first direction is different from the second direction. The connecting portion protrudes from each of the first edge, the second edge, and the third edge, and each connecting portion is fixedly connected corresponding to one positioning surface.

[0029] Positioning the curved mirror in the first direction (for example, the X direction) and the second direction (for example, the Y direction) helps to improve the assembly accuracy between the curved mirror and the housing.

[0030] According to the first aspect, in a possible embodiment, the housing further includes a positioning post protruding from the positioning surface, and the positioning post penetrates the connecting portion. Thereby, the movement of the curved mirror with respect to the housing is restricted.

[0031] According to the first aspect, in a possible embodiment, a positioning groove is provided in the housing. The curved mirror includes a mirror body and a positioning protrusion protruding from an edge of the mirror body. The positioning protrusion is accommodated in the positioning groove. This helps to reduce the possibility of the curved mirror moving relative to the housing.

[0032] According to the first aspect, in a possible embodiment, the housing includes a connected first portion and a second portion. The light source unit is fixed to the first portion. The curved mirror is fixed to the second portion. The second portion surrounds at least a part of the first opening.

[0033] Since the light source unit is installed and accommodated in the first portion, and the transmissive-reflective optical element and the curved mirror are located in the second portion, it is difficult for the user to see the light source unit located in the first portion using the transmissive-reflective optical element when viewing the optical display. That is, the light source unit is hidden in the first portion. This helps to improve the user experience.

[0034] According to the first aspect, in a possible embodiment, a light emitting surface is provided on the light source unit. The transmissive-reflective optical element is provided with a reflective surface, and the light emitting surface is disposed obliquely with respect to the reflective surface. In this way, the imaging light emitted from the light emitting surface can directly enter the transmissive-reflective optical element, so that other optical elements are reduced or become unnecessary, and the internal optical path and the structure of the optical display are simplified.

[0035] According to a first aspect, in a possible embodiment, the first opening includes a first mounting edge and a second mounting edge positioned opposite each other. The light source unit includes a light-emitting region, which includes a first light-emitting region edge and a second light-emitting region edge positioned opposite each other. A first point on the first mounting edge and a second point on the second light-emitting region edge are located on a connecting line. The first light-emitting region edge is located on the first side of the connecting line. The second mounting edge is located on the second side of the connecting line. When a user views the optical display, the user's eyes are located on the first side of the connecting line.

[0036] When a user views the optical display, their eye and the edge of the first light-emitting area are located on the same side of the connecting line, preventing the user from seeing the bright spot (bright point) of the light source unit. This provides privacy protection and improves the user experience.

[0037] According to a first aspect, in a possible embodiment, the housing is further provided with a second opening that communicates with the first opening. A curved mirror is located in the second opening. The optical display further includes a cover, which is detachably connected to the housing and covers the second opening.

[0038] The second opening is provided to facilitate the attachment or removal of the curved mirror from the housing, that is, to facilitate the assembly and disassembly of the curved mirror and the housing. Eliminating the cover helps to seal the second opening and reduce the ingress of dust into the housing.

[0039] According to a second aspect, the present invention provides a transport means including the optical display described above, wherein the optical display is attached to the transport means.

[0040] According to the second aspect, in possible application scenarios, the optical display is integrated into a head-up display, which can project navigation information, instrument information, etc., into the driver's forward field of view. In this way, the driver does not need to switch their gaze between the image and the road surface when looking down to view the information. This reduces emergency response time and improves driving safety.

[0041] In possible application scenarios, the optical display can be integrated into an in-vehicle display, which can be installed on the back of a seat or on the passenger seat, etc. Users can then use the optical display to view videos and other content, thus improving the entertainment capabilities of the mode of transport.

[0042] In possible application scenarios, the optical display may be integrated into the vehicle's lighting. [Brief explanation of the drawing]

[0043] [Figure 1] This is a diagram illustrating an application scenario for a transport means according to one embodiment of the present invention. [Figure 2a] This is a cross-sectional view of an optical display according to one embodiment of the present invention. [Figure 2b] Figure 2a is a three-dimensional exploded view of the optical display shown. [Figure 3] This is a diagram illustrating the principle of virtual image formation in an optical display according to one embodiment of the present invention. [Figure 4] This is a three-dimensional drawing of an optical display housing according to one embodiment of the present invention. [Figure 5] This is a cross-sectional view of a housing for an optical display according to one embodiment of the present invention. [Figure 6] This is a magnified view of area A in Figure 2a. [Figure 7] This is a magnified view of area B in Figure 2a. [Figure 8a] This is a diagram of a housing for an optical display according to one embodiment of the present invention. [Figure 8b]This is a three-dimensional view from a different angle of the housing of an optical display according to one embodiment of the present invention. [Figure 9] This is a plan view showing the housing and light source unit assembled together according to one embodiment of the present invention. [Figure 10a] This diagram shows the arrangement of a fixed post and a positioning post on the installation surface according to one embodiment of the present invention. [Figure 10b] This is a three-dimensional view of a housing from yet another angle according to one embodiment of the present invention. [Figure 11] This is a three-dimensional exploded view of a housing and a curved mirror according to one embodiment of the present invention. [Figure 12] This is a plan view of a curved mirror according to one embodiment of the present invention. [Figure 13] This diagram shows a housing and a curved mirror assembled together according to one embodiment of the present invention. [Figure 14] This is a magnified view of area C in Figure 13. [Figure 15a] This is a plan view of a curved mirror structure according to one embodiment of the present invention. [Figure 15b] This is a plan view of a curved mirror structure according to one embodiment of the present invention. [Figure 15c] This is a plan view of a curved mirror structure according to one embodiment of the present invention. [Figure 15d] This is a plan view of a curved mirror structure according to one embodiment of the present invention. [Figure 16] This is a view from a different angle of a three-dimensional assembly of a housing and a curved mirror according to one embodiment of the present invention. [Figure 17] This is another cross-sectional view of an optical display according to one embodiment of the present invention. [Figure 18a] This is a diagram showing a partial structure of a transport means according to one embodiment of the present invention. [Figure 18b] This is a diagram of a possible embodiment in which an optical display is integrated into a head-up display. [Figure 19] This is a diagram illustrating the function of the transportation means according to the present invention. [Figure 20]This is a diagram illustrating possible application scenarios for an optical display according to one embodiment of the present invention. [Figure 21] This is a diagram showing another possible application scenario for an optical display according to one embodiment of the present invention. [Modes for carrying out the invention]

[0044] Please refer to Figure 1. Embodiments of the present application provide a means of transport 1000. The means of transport 1000 in embodiments of the present application may be known means of transport such as a vehicle, aircraft, ship, or rocket, or it may be a means of transport that will emerge in the future. The vehicle may be an electric vehicle, a fuel cell vehicle, or a hybrid powered vehicle, for example, a pure electric vehicle, a long-range electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, or a new energy vehicle. This is not particularly limited in the present application.

[0045] The transport means 1000 includes a cockpit 200 and seats installed in the cockpit 200. The seats include a first seat 300 and a second seat 500, which are used for passengers to sit in. In this embodiment, the first seat 300 is a front seat located within the cockpit 200. The second seat 500 is a rear seat located behind the first seat 300 and is used for passengers to sit in. In another embodiment of the present application, the first seat 300 may not be a front seat.

[0046] The first seat 300 includes a seat body 301 and an optical display 10 installed on the seat body 301. In this application, a passenger who views the optical display 10 on the second seat 500 is referred to as a viewer. It is understood that the optical display 10 may alternatively be installed in the front seat of the transport vehicle 1000 (shown in Figure 1), i.e., on the instrument panel (IP) console of the transport vehicle.

[0047] Please refer to Figure 2a. An embodiment of the present invention provides an optical display 10 configured to output imaging light that carries image information.

[0048] Please refer to Figures 2a and 2b. The optical display 10 includes a housing 1, a light source unit 3, a transmissive reflective optical element 5, a curved mirror 7, a connecting component 8, and a cover 9.

[0049] The light source unit 3 is fixed to the housing 1 and configured to emit imaging light. The transmissive-reflective optical element 5 is fixed to the housing 1 and configured to transmit and reflect imaging light. The curved mirror 7 is fixed to the housing 1 using connecting parts 8 and configured to reflect imaging light. The cover 9 is fixed to the housing 1, covers the curved mirror 7, protects the curved mirror 7, and is configured to reduce the intrusion of dust into the housing 1.

[0050] The imaging light emitted from the light source unit 3 is reflected by the curved mirror 7 via the transmissive reflective optical element 5, and the imaging light reflected by the curved mirror 7 is transmitted to the outside of the housing 1 via the transmissive reflective optical element 5. The light source unit 3 may be called an image source. The transmissive reflective optical element 5 can reflect the imaging light emitted from the light source unit 3 to the curved mirror 7 and transmit the imaging light reflected by the curved mirror 7.

[0051] In conventional optical displays, optical elements such as light sources and curved mirrors are first fixed to their respective fixed frames, and then assembled into the housing. In this case, the optical display has a large number of elements. Because there are assembly tolerances between the elements, a large number of elements can make the assembly of the system / device difficult and potentially reduce assembly accuracy.

[0052] However, in this invention, the light source unit 3, the transmissive reflective optical element 5, and the curved mirror 7 are each directly fixed to the same housing 1 without using separate adapters (e.g., their respective fixing frame bodies). As a result, the number of elements in the optical display 10 is reduced, the difficulty of assembling the optical display 10 is eased, the assembly accuracy of the optical display 10 is improved, and the structure of the optical display 10 is simplified. This further improves the accuracy of the optical path system of the optical display 10 and improves the output quality of the imaging light of the optical display 10.

[0053] Refer to Figure 3. In some embodiments of the present invention, a curved mirror 7 transmits imaging light through a transmissive reflective optical element 5 to the outside of the housing 1, and the imaging light then enters the eye 80, thereby allowing the eye 80 to see an enlarged virtual image. The virtual image can be observed by the eye without being received by an optical screen. As shown in Figure 3, the light source unit 3 emits imaging light L having a specific divergence angle. The imaging light L enters the eye 80 after being reflected by the transmissive reflective optical element 5 and the curved mirror 7. In this case, the brain tracks the light backward based on its experience of "straight-line propagation of light," and considers the point where the backward-extended imaging light L intersects as the object point, i.e., the virtual image point. The position of the eye 80 may be called the eyebox position.

[0054] In another embodiment of the present invention, the curved mirror 7 may project imaging light onto a light screen (not shown) located outside the housing 1 after the imaging light has passed through the transmission-reflective optical element 5. The light screen may be a wall, a projection screen, or a wooden board, etc. The specific shape of the light screen is not limited in the present invention.

[0055] In some embodiments of the present application, the housing 1 is a single-piecely molded housing. In another embodiment of the present application, the housing 1 may be formed by assembling two or more parts.

[0056] Please refer to Figures 4 and 5. Housing 1 includes the main housing 11 and the mounting portion 13.

[0057] The main housing 11 includes a connected first portion 1101 (which can be considered the upper part of the housing 1) and a second portion 1103 (which can be considered the lower part of the housing 1). The cavity enclosed by the first portion 1101 and the second portion 1103 includes a first opening 103 (shown in Figure 5) and a second opening 105 (which can also be called two front and rear openings). The first opening 103 communicates with the internal cavity of the main housing 11, and the second opening 105 communicates with the internal cavity of the main housing 11. The first opening 103 is configured to allow imaging light to pass through. The second opening 105 is configured for assembling the curved mirror 7. The light source unit 3 is fixedly housed in the first portion 1101. The transmissive reflective optical element 5 and the curved mirror 7 are located in the second portion 1103.

[0058] Since the light source unit 3 is installed and housed in the first section 1101, and the transmissive reflective optical element 5 and the curved mirror 7 are located in the second section 1103, it is difficult to see the light source unit 3 located in the first section 1101 using the transmissive reflective optical element 5 when viewing the optical display 10. In other words, the light source unit 3 is hidden within the first section 1101. Because stray light from the light source unit 3 does not directly reach the human eye via the transmissive reflective optical element 5, the user experience is improved, and the image quality of the optical display 10 is also improved.

[0059] In some embodiments of the present application, the first portion 1101 includes a first side wall 111 and a second side wall 112 that are bent and connected. The mounting surface 1113, which is positioned facing the internal cavity of the main housing 11, is positioned on the first side wall 111 and is configured to be connected to (for mounting the light source unit 3).

[0060] In some embodiments of the present application, the second portion 1103 includes a third side wall 113, a fourth side wall 114, and a fifth side wall 115. The third side wall 113 is fixedly connected between the fourth side wall 114 and the fifth side wall 115.

[0061] The positioning groove 106 is formed in the inner wall of the third side wall 113, which faces the internal cavity of the main housing 11, and is configured to position the curved mirror 7.

[0062] The fourth side wall 114 and the fifth side wall 115 are positioned opposite each other. The first side wall 111 is located between the fourth side wall 114 and the fifth side wall 115. The second side wall 112 is located between the fourth side wall 114 and the fifth side wall 115. The third side wall 113 is located between the fourth side wall 114 and the fifth side wall 115. The first side wall 111, the second side wall 112, the third side wall 113, the fourth side wall 114, and the fifth side wall 115 together form the internal cavity of the main housing 11. The second side wall 112, the third side wall 113, the fourth side wall 114, and the fifth side wall 115 together form the first opening 103. The first side wall 111, the third side wall 113, the fourth side wall 114, and the fifth side wall 115 together form a second opening 105.

[0063] Please refer to Figure 6. The mounting portion 13 protrudes from the outer surface of the main housing 11 and is configured to fix the transmissive reflective optical element 5. The internal optical path of the optical display 10 is located inside the main housing 11, and the mounting portion 13 for fixing the transmissive reflective optical element 5 is located outside the main housing 11, so the mounting portion 13 does not affect the internal optical path of the optical display 10. In other words, the mounting portion 13 does not affect the transmission of imaging light inside the main housing 11, thereby reducing the generation of reflected stray light from the optical display 10 and improving the output quality of the imaging light from the optical display 10.

[0064] The mounting portion 13 includes a mounting bottom wall 132 and a protective flange 134. The mounting bottom wall 132 protrudes from the outside of the main housing 11, and the mounting surface 1320 is positioned on the mounting bottom wall 132 and fixedly connected to the transmission-reflection optical element 5. In this embodiment, the mounting bottom wall 132 protrudes from the second side wall 112, the third side wall 113, the fourth side wall 114, and the fifth side wall 115, and the mounting bottom wall 132 is positioned along the peripheral contour of the first opening 103. The mounting surface 1320 is positioned obliquely to the mounting surface 1113 (see Figure 5).

[0065] The transmissive reflective optical element 5 is fixedly connected to the mounting surface 1320 of the mounting bottom wall 132. The transmissive reflective optical element 5 is positioned parallel to the mounting surface 1320. The mounting surface 1320 is positioned parallel to the transmissive reflective optical element 5, and the position of the mounting surface 1320 corresponds to the position of the transmissive reflective optical element 5 in the optical path of the optical display 10. In the process of assembling the transmissive reflective optical element 5 and the housing 1, the mounting surface 1320 can position the transmissive reflective optical element 5 in the direction normal to the mounting surface 1320, thereby improving the positioning accuracy of the transmissive reflective optical element 5 using the housing 1 and improving the output quality of the imaging light in the optical display 10.

[0066] In some embodiments of the present invention, the transmission-reflection optical element 5 is bonded to the mounting bottom wall 132 using an adhesive. The adhesive may be a double-sided adhesive, or a bonding method may be employed.

[0067] In another embodiment of the present invention, the transmissive-reflective optical element 5 and the mounting surface 1320 may be arranged non-parallel to each other.

[0068] In another embodiment of the present invention, the mounting surface 1320 is located on the inner wall of the housing 1, and the transmissive-reflective optical element 5 may alternatively be located inside the housing 1.

[0069] The protective flange 134 protrudes from the mounting base wall 132 and is positioned along the periphery of the mounting base wall 132 to protect the edge of the transmissive reflective optical element 5. In some embodiments of the present application, the protective flange 134 is positioned around the transmissive reflective optical element 5 and surrounds it. In another embodiment of the present application, the protective flange 134 protrudes from a portion of the periphery of the mounting base wall 132 and protects the edge of the transmissive reflective optical element 5 by segment or region, i.e., the protective flange 134 protects at least a portion of the edge of the transmissive reflective optical element 5.

[0070] The protective flange 134 surrounds at least a portion of the edge of the transmissive reflective optical element 5 to protect it, reducing the possibility of the transmissive reflective optical element 5 being scratched or damaged, and further extending the service life of the transmissive reflective optical element 5. In addition, by surrounding at least a portion of the edge of the transmissive reflective optical element 5, the protective flange 134 reduces the possibility of the user being scratched or cut by the edge of the transmissive reflective optical element 5, thereby improving the safety and reliability of the optical display 10.

[0071] In another embodiment of the present invention, the mounting portion 13 may be omitted, and the transmission-reflective optical element 5 may be directly fixed to the main body housing 11, or alternatively, the transmission-reflective optical element 5 may be housed inside the main body housing 11.

[0072] Refer to Figure 7. The housing 1 further includes a fixed post 14 and a light source positioning post 15 that protrude from the mounting surface 1113. The fixed post 14 is fixedly connected to the light source unit 3.

[0073] The light source unit 3 may be positioned parallel to the mounting surface 1113. The position of the mounting surface 1113 corresponds to the position of the light source unit 3 in the optical path of the optical display 10. In the process of assembling the light source unit 3 and the housing 1, the mounting surface 1113 can position the light source unit 3 in the direction normal to the mounting surface 1113, thereby improving the positioning accuracy of the light source unit 3 using the housing 1 and improving the output quality of the imaging light in the optical display 10. In another embodiment of the present invention, the light source unit 3 and the mounting surface 1113 may be positioned non-parallel instead.

[0074] The light source positioning post 15 is configured to position the light source unit 3.

[0075] Refer to Figures 8a and 8b. The housing 1 further includes a positioning section 16 located on the inner wall of the main housing 11 for positioning the curved mirror 7.

[0076] In some embodiments of the present application, there are a plurality of positioning portions 16, which are arranged on the inner wall of the main housing 11. Each of the first side wall 111, the fourth side wall 114, and the fifth side wall 115 is provided with a positioning portion 16 facing the inner wall of the internal cavity of the main housing 11. The positioning portion 16 has a substantially groove-like structure. For example, as shown in Figure 8b, the positioning portion 16 of the first side wall 111 is a groove-like structure arranged on the first side wall 111 and located within the main housing 11, and the positioning portion 16 of the fifth side wall 115 is a groove-like structure recessed in the fifth side wall 115 and located within the main housing 11. Each positioning portion 16 includes a first positioning surface 162 and a side surface 164. The first positioning surface 162 is positioned facing the second opening 105 and is configured to be attached to the curved mirror 7, thereby improving the assembly accuracy between the curved mirror 7 and the housing 1.

[0077] The structure of the positioning section 16 is not limited in this application, as long as the positioning section 16 can position the curved mirror 7. For example, a plurality of protruding posts may protrude from the inner wall of the main housing 11. The plurality of protruding posts may surround a single positioning section 16, which can restrict the position of the curved mirror 7 on the housing 1.

[0078] In some embodiments of the present application, the normal direction of the first positioning surface 162 is the same as the normal direction of the second opening 105, and the first positioning surfaces 162 of the multiple positioning parts 16 can be located on the same plane. In another embodiment of the present application, the first positioning surfaces 162 of the multiple positioning parts 16 may be parallel to each other or not. In another embodiment of the present application, the normal direction of the first positioning surface 162 may be different from the normal direction of the second opening 105.

[0079] The housing 1 further includes a positioning post 18 protruding from a first positioning surface 162, which is configured to position the curved mirror 7.

[0080] The housing 1 further includes a connecting post 19 protruding from a first positioning surface 162, which is configured to be fixedly connected to a curved mirror 7.

[0081] In another embodiment of the present invention, the housing 1 does not have to be a single-piece housing.

[0082] In another embodiment of the present invention, the structure of the housing 1 is not limited. For example, the first opening 103 and the second opening 105 are located in the second portion 1103, and the housing 1 can house a light source unit 3, a transmissive reflective optical element 5, and a curved mirror 7, thereby enabling the optical display 10 to output imaging light.

[0083] In another embodiment of the present invention, the second opening 105 may be omitted, and the curved mirror 7 is fixedly housed within the housing 1.

[0084] In the optical display 10 provided in this application, the light source unit 3, the transmissive reflective optical element 5, and the curved mirror 7 are integrated as a whole on the housing 1. Therefore, the relative positions of the light source unit 3, the transmissive reflective optical element 5, and the curved mirror 7 are determined based on optical principles. This ensures the display effect of the optical display 10.

[0085] In some embodiments of this application, the light source unit 3 uses liquid crystal display (LCD) imaging technology. LCD imaging uses the principle of the photoelectric effect of liquid crystals. The arrangement of liquid crystal molecules changes under the influence of an external electric field. Liquid crystal molecules in different arrangements can control the transmittance of light. For example, liquid crystal molecules are located between two polarizers whose polarization directions are orthogonal to each other. When no electric field is applied, the liquid crystal molecules can rotate the polarization direction of linearly polarized light passing through the first polarizer by 90°. In this case, the light passes through the second polarizer with maximum transmittance. When an electric field is applied, the arrangement of the liquid crystal molecules changes, the rotation angle of polarization also changes, and the intensity of light passing through the second polarizer decreases. Each pixel of the LCD contains three primary colors. A color image is displayed by controlling the intensity of the three primary colors. The type of light source for the light source unit 3 is not limited in this application. For example, the light source unit 3 may further use digital light processing (DLP) technology or laser scan projection, etc.

[0086] Refer to Figure 9 for some embodiments of the present application. The light source unit 3 includes an emitting region 301 and a non-emitting region 302. The emitting region 301 is configured to emit imaging light. The non-emitting region 302 may be the frame of the light source unit 3. In some embodiments of the present application, the non-emitting region 302 is fixedly connected to a fixed post 14.

[0087] The non-emitting region 302 is arranged around the emitting region 301, and fixing holes 31 are provided in the non-emitting region 302. The number of fixing holes 31 corresponds to the number of fixing posts 14. There are four fixing holes 31, and the four fixing holes 31 are distributed at the corners of the light source unit 3. See Figure 10a. There are four fixing posts 14. The fixing posts 14 are studs, and the fixing posts 14 are provided with screw holes into which screws are fitted. The screws pass through the fixing holes 31 and are then tightened into the screw holes of the fixing posts 14, thereby fixing the light source unit 3 to the fixing posts 14. The shape of the light source unit 3 is not limited in this application. For example, the light source unit 3 may be circular or irregular in shape, and the light source unit 3 may emit imaging light. In another embodiment of this application, the fixing posts 14 may be fixed to the fixing holes 31 and pass through the fixing holes 31.

[0088] A non-emitting region 302 is provided in the positioning hole 33, and the positioning hole 33 is configured to penetrate the light source positioning post 15, thereby positioning the light source unit 3 on the housing 1.

[0089] In some embodiments of the present application, the positioning hole 33 includes a first positioning hole 332 and a second positioning hole 334. The light source positioning post 15 includes a first light source positioning post 152 and a second light source positioning post 154. The first light source positioning post 152 penetrates the first positioning hole 332, and the second light source positioning post 154 penetrates the second positioning hole 334. In the direction of alignment of the first positioning hole 332 and the second positioning hole 334, the length of the first positioning hole 332 is greater than the length of the second positioning hole 334. For example, the second positioning hole 334 is a circular hole, and the first positioning hole 332 is an elongated hole whose length in the first direction is greater than the diameter of the second positioning hole 334.

[0090] In an ideal state, the shape of the positioning hole 33 matches the shape of the light source positioning post 15, and the set interval (design interval) between the two positioning holes 33 is the same as the set interval between the two light source positioning posts 15. For example, the positioning hole 33 is circular and the light source positioning post 15 is cylindrical. However, in reality, manufacturing tolerances are unavoidable, resulting in a discrepancy between the actual interval between the two light source positioning posts 15 and the set interval. In this case, the light source positioning post 15 of the light source unit 3 may not be able to be attached to the corresponding positioning hole 33.

[0091] In this invention, in the direction of alignment of the first positioning hole 332 and the second positioning hole 334, the length of the first positioning hole 332 is longer than the length of the second positioning hole 334, ensuring an assembly margin when assembling the light source unit 3 to the housing 1 via the first positioning hole 332. In other words, even if there is a difference between the actual distance between the first light source positioning post 152 and the second light source positioning post 154 and the set distance, the light source unit 3 can be assembled to the housing 1. For example, even if the actual distance between the first light source positioning post 152 and the second light source positioning post 154 is greater than the set distance, the first light source positioning post 152 can be attached to the first positioning hole 332, and the second light source positioning post 154 can be attached to the second positioning hole 334. In this way, the requirements for manufacturing precision and manufacturing costs of the housing 1 and the optical display 10 are reduced.

[0092] In another embodiment of the present invention, the fixing post 14, the first light source positioning post 152, and the second light source positioning post 154 may all be omitted. The light source unit 3 may be directly fixed to the mounting surface 1113 of the first side wall 111. The method of fixing the light source unit 3 to the housing 1 is not limited in the present invention. For example, the non-emitting region 302 of the light source unit 3 may be omitted, and the light-emitting region 301 of the light source unit 3 may be attached to the first side wall 111 using an adhesive, so that the light source unit 3 covers the first side wall 111.

[0093] In another embodiment of the present invention, the light source unit 3 may be fixed to the outside of the housing 1 instead. That is, the mounting surface 1113 may be located on the outer surface of the housing 1. For example, a light-transmitting region may be located on the side wall of the housing 1, and imaging light emitted from the light source unit 3 enters the internal cavity of the housing 1 through the light-transmitting region. The light-transmitting region may be a through-hole or a transparent region.

[0094] Refer to Figures 9 and 3. The light-emitting region 301 includes a first light-emitting region edge 3011 and a second light-emitting region edge 3013, which are positioned opposite each other. In some embodiments of the present application, the first light-emitting region edge 3011 is located at the end of the light-emitting region 301, near the first opening 103. The second light-emitting region edge 3013 is located at the end of the light-emitting region 301, away from the first opening 103. The imaging light L includes imaging light L1 and imaging light L2. The imaging light from the two channels limits the opening angle of the light emitted from the light source unit 3. The imaging light L1 is emitted from the first light-emitting region edge 3011, and the imaging light L2 is emitted from the second light-emitting region edge 3013.

[0095] The light-emitting region 301 of the light source unit 3 has a light-emitting surface, and the transmissive reflective optical element 5 has a reflective surface. The light-emitting surface of the light source unit 3 is positioned obliquely to the reflective surface of the transmissive reflective optical element 5, and no other optical elements are required. Since the imaging light emitted from the light-emitting surface can be directly incident on the transmissive reflective optical element 5, the internal optical path and structure of the optical display 10 are simplified.

[0096] Refer to Figures 3 and 10b. The first opening 103 includes a first mounting edge 1031 and a second mounting edge 1033, which are positioned opposite each other. The first mounting edge 1031 is located at the end of the second side wall 112, away from the second opening 105. The second mounting edge 1033 is located at the end of the third side wall 113, away from the second opening 105. A first point on the first mounting edge 1031 and a second point on the edge 3013 of the second light-emitting region are located on the connecting line M. The first light-emitting region edge 3011 is located on the first side of the connecting line M, and the second mounting edge 1033 is located on the second side of the connecting line M. When a user uses the optical display 10, the eye 80 is located on the first side where the first mounting edge 1031 is located, and the eye 80 is positioned above the connecting line M, so the eye 80 does not directly see the light-emitting area 301 (i.e., the bright spot) of the light source unit 3 during normal viewing. This prevents stray light from the light source unit 3 from being directly transmitted to the human eye via the transmissive reflective optical element 5 (normally, stray light is first reflected by the transmissive reflective optical element 5 to the curved mirror 7, then reflected again by the curved mirror 7, and then enters the human eye via the transmissive reflective optical element 5). This improves the display effect of the optical display 10 and enhances the user experience.

[0097] As can be seen from Figure 3, the first mounting edge 1031 included in the first opening 103 may be referred to as the upper edge of the first opening 103, and the second mounting edge 1033 may be referred to as the lower edge of the first opening 103. Correspondingly, the first light-emitting region edge 3011 of the light-emitting region 301 may be referred to as the upper edge of the light-emitting region 301, and the second light-emitting region edge 3013 may be referred to as the lower edge of the light-emitting region 301.

[0098] The transmission-reflective optical element 5 is an optical element that transmits a portion of the incident light and reflects a portion of the incident light that enters it. For example, the transmission-reflective optical element can transmit 50% of the incident light and reflect 50% of the incident light. Alternatively, the transmission-reflective optical element can transmit 30% of the incident light and reflect 70% of the incident light. The ratio of the incident light transmitted by the transmission-reflective optical element 5 to the total incident light can be selected based on requirements. The transmission-reflective optical element 5 can be made from glass or the like.

[0099] In this embodiment, the curved mirror 7 is a reflecting mirror that coincides with a free-form surface required for optical imaging.

[0100] The surfaces of optical elements used in conventional optical design are typically spherical. Usually, multiple spherical mirrors need to work together to correct aberrations. As a result, the optical structure of the optical element is complex and occupies a large space.

[0101] With the development of the optics industry, the design and manufacturing technologies for complex aspherical surfaces have improved significantly. Aspherical surfaces are typically quadratic surfaces such as parabolas, ellipsoids, involutes, hyperbolas with an axis of rotation, higher-order surfaces, and non-rotating aspherical surfaces such as off-axis aspherical surfaces. In various application scenarios, one aspherical surface typically replaces two or more spheres to correct aberrations, simplify optical structures, and achieve miniaturization and weight reduction of optical paths.

[0102] Compared to aspherical surfaces, freeform surfaces are more complex optical structures. Each point on the surface has a different radius of curvature, resulting in a very high degree of freedom. Freeform surfaces can not only replace multiple aspherical surfaces to correct aberrations, but also maximize optical quality and simplify optical structures. Optical freeform surfaces are structurally complex, have a high degree of freedom, and lack clear descriptive definitions. Generally, an optical freeform surface refers to an optical surface that lacks global rotational symmetry, does not have a unified optical axis, and has multiple radii of curvature across its entire surface.

[0103] In another embodiment of the present application, the curved mirror 7 may be a spherical or aspherical mirror instead. This is not limited to the present application.

[0104] Please refer to Figures 11 and 12. The curved mirror 7 includes a mirror body 72, a connecting portion 74, and a positioning projection 76. The connecting portion 74 protrudes from the mirror body 72 and is housed in the positioning portion 16, and is configured to be fixedly connected to the positioning portion 16. The positioning projection 76 protrudes from the mirror body 72 and is housed in the positioning groove 106.

[0105] The mirror body 72 includes a first edge 722, a second edge 724, a third edge 726, and a fourth edge 728. The first edge 722 and the second edge 724 are positioned opposite each other in a first direction (e.g., the X direction shown in Figures 11 and 12). The third edge 726 and the fourth edge 728 are positioned opposite each other in a second direction (e.g., the Y direction shown in Figures 11 and 12), where the first direction is different from the second direction. The normal direction of the first positioning surface 162 is a third direction (the Z direction shown in Figures 11 and 12), where the third direction is different from the first direction, and the third direction is different from the second direction. In this embodiment, the first direction is perpendicular to the second direction, the first direction is perpendicular to the third direction, and the second direction is perpendicular to the third direction. The first edge 722 is positioned on the side where the mirror body 72 is adjacent to the fourth side wall 114. The second edge 724 is positioned on the side where the mirror body 72 is adjacent to the fifth side wall 115. The third edge 726 is positioned on the side where the mirror body 72 is adjacent to the first side wall 111. The fourth edge 728 is positioned on the side where the mirror body 72 is adjacent to the third side wall 113. In some embodiments of the present application, in the second direction, i.e., from the fourth edge 728 to the third edge 726 of the curved mirror 7, the position of the light-emitting region 301 of the light source unit 3 is higher than the position of the curved mirror 7 and the position of the transmissive reflective optical element 5 (as shown in Figures 1 and 3).

[0106] In some embodiments of the present invention, there are multiple connection portions 74. Each connection portion 74 is housed in a positioning portion 16 and is fixedly connected to a first positioning surface 162 of the positioning portion 16.

[0107] The connecting portions 74 protrude from the first edge 722, the second edge 724, and the third edge 726. Each connecting portion 74 is housed in correspondence with one positioning portion 16. Each connecting portion 74 is fixedly connected to the first positioning surface 162 of the positioning portion 16 using a connecting component 8. In this embodiment, one connecting portion 74 protrudes from the first edge 722 and the second edge 724 respectively, and two connecting portions 74 protrude from the third edge 726. The four connecting portions 74 are located at approximately four corners of the mirror body 72.

[0108] The connecting portion 74 on the first edge 722, the connecting portion 74 on the second edge 724, and the connecting portion 74 on the third edge 726 cooperate with the corresponding positioning portion 16 to position the curved mirror 7 on the main housing 11.

[0109] Each connection portion 74 is further provided with a groove 742 that penetrates the connection portion 74 in a third direction, and this groove is configured to pass through the positioning post 18. See Figures 13 and 14. Each positioning post 18 on the housing 1 is configured to pass through the groove 742 of one connection portion 74 and to position the connection portion 74. This facilitates assembly between the curved mirror 7 and the housing 1 and improves the assembly accuracy and efficiency of the optical display 10.

[0110] A second positioning surface 740 (see Figure 12), which is pressed against or attached to the first positioning surface 162, is positioned on the side of each connection portion 74 facing the first positioning surface 162. A reflective layer (e.g., a reflective coating) is placed on the curved mirror 7 to form a reflective surface that reflects imaging light. The reflective surface may be located on the side of the curved mirror 7 facing the second opening 105, or it may be located on the side of the curved mirror 7 away from the second opening 105, i.e., on the side facing the first opening 103. The second positioning surface 740 may or may not have a reflective layer. The first positioning surface 162 and the second positioning surface 740 are parallel and press against each other to achieve positioning of the curved mirror 7 in a third direction and restrict rotation of the curved mirror 7 around the first and second directions. In some embodiments of the present application, the second positioning surfaces 740 of the multiple connection portions 74 are located on the same plane. In another embodiment of the present application, the first positioning surface 162 and the second positioning surface 740 may be arranged non-parallel, and the second positioning surfaces 740 of the multiple connection portions 74 may be arranged parallel or non-parallel.

[0111] Through the cooperation of the connecting portion 74 located on the edge of the mirror body 72 and the corresponding positioning portion 16, the curved mirror 7 is positioned in three directions, and rotation of the curved mirror 7 around these three directions is also restricted. This further improves the positional stability of the curved mirror 7 relative to the housing 1, and further improves the display quality of the optical display 10.

[0112] Due to differences in manufacturing materials, the thermal expansion coefficients of curved mirrors and other fitting components of optical displays (e.g., housings) are typically different. Therefore, when the ambient temperature changes significantly, curved mirrors become more susceptible to deformation due to pressure from other fitting components. Using a curved mirror and housing as an example, if the ambient temperature of the optical display exceeds the set temperature (e.g., 70°C), the curved mirror and housing may deform due to thermal expansion, and the housing may press against the curved mirror. When the curved mirror deforms, the optical path of the imaging light reflected from the deformed portion becomes distorted, ultimately affecting the output quality of the imaging light from the optical display.

[0113] In some embodiments of the present application, the thermal expansion coefficient of the curved mirror 7 differs from that of the housing 1. Due to the thermal expansion coefficients of the housing 1 and the curved mirror 7, a reserved gap 700 (shown in Figure 14) exists between the edges of the curved mirror 7 (including the first edge 722, the second edge 724, the third edge 726, the fourth edge 728, and the edge of the connecting portion 74) to provide space for the thermal expansion of the curved mirror 7 and the housing 1. This reduces the possibility of deformation of the curved mirror 7 due to compression and improves the optical path stability of the optical display 10.

[0114] The pre-gap 700 includes a first pre-gap 701 and a second pre-gap 702. The first pre-gap 701 is provided between the side surface 164 and the edge of the connecting portion 74, and secures space for thermal expansion between the connecting portion 74 and the housing 1.

[0115] A second pre-gap 702 is provided between the inner wall of the groove 742 of each connection portion 74 and the corresponding positioning post 18, thereby securing space for thermal expansion between the positioning post 18 and the connection portion 74. In some embodiments of the present application, the length of the mirror body 72 in the first direction may be longer than the length of the mirror body 72 in the second direction, and the degree of thermal expansion of the curved mirror 7 in the first direction may be greater than the degree of thermal expansion of the curved mirror 7 in the second direction. Take the positioning portion 16 and the corresponding connection portion 74 of the fourth side wall 114 as an example. In the first direction, the second pre-gap 702 exists between a portion of the inner wall of the groove 742 and the corresponding positioning post 18. In the second direction, a portion of the inner wall of the groove 742 is in close contact with the corresponding positioning post 18, reducing the possibility of deformation of the curved mirror 7 due to thermal expansion and improving the positioning accuracy of the positioning portion 16 on the connection portion 74. In another embodiment of the present application, the length of the mirror body 72 in the first direction is greater than or equal to the length of the mirror body 72 in the second direction.

[0116] Referring to Figure 12, the positioning projection 76 protrudes from the fourth edge 728 of the mirror body 72, and the positioning projection 76 is housed in the positioning groove 106 and fixed to the inner wall of the positioning groove 106 to position the curved mirror 7 in the first direction. This improves the assembly efficiency and assembly accuracy when assembling the curved mirror 7 to the housing 1. The shape of the positioning projection 76 can be a square or a cone, etc. The shape of the positioning projection 76 is not limited in this application. In another embodiment of this application, the positioning projection 76 may be housed within the positioning groove 106.

[0117] The number and location of the connecting portions 74 on the curved mirror 7 are not limited in this application, nor are the number and location of the positioning projections 76 on the edges of the mirror body 72. For example, as shown in Figure 15a, in possible embodiments, the connecting portion 74 on the third edge 726 may be omitted, the connecting portion 74 on the first edge 722 may be located near the third edge 726, the connecting portion 74 on the second edge 724 may be located near the third edge 726, and the two connecting portions 74 may protrude from the fourth edge 728. As shown in Figure 15b, in possible embodiments, the positioning projections 76 on the fourth edge 728 may be omitted, and the connecting portion 74 may not be located on the fourth edge 728. As shown in Figure 15c, in possible embodiments, the connecting portion 74 on the first edge 722 may be omitted, and the connecting portion 74 on the second edge 724 may be omitted. Positioning projections 76 are located on the third edge 726 and the fourth edge 728, respectively. The curved mirror 7 is fixed to the housing by fixing the positioning projections 76 in the positioning grooves 106. In a possible embodiment, as shown in Figure 15d, the positioning projections 76 are located on the first edge 722, the second edge 724, the third edge 726, and the fourth edge 728, respectively.

[0118] In another embodiment of the present invention, the positioning post 18, positioning portion 16, and connecting post 19 may be omitted, and the connecting portion 74 is fixed directly to the housing 1 using an adhesive or other method.

[0119] In this application, the shape of the mirror body 72 is not limited, the number of edges of the mirror body 72 is not limited, and the number of connecting portions 74 is not limited. For example, in another embodiment of this application, the mirror body 72 may be circular, the mirror body 72 may have only one edge, the connecting portion 74 may be only one, and the connecting portion 74 protrudes from the mirror body 72.

[0120] In this application, the positioning projection 76 is not limited to being located on the fourth edge 728, but may be located on the edge of the mirror body 72. In another embodiment of this application, the positioning groove 106 and the positioning projection 76 may be omitted.

[0121] In another embodiment of the present invention, the curved mirror 7 is not housed in an internal cavity of the main housing 11, the curved mirror 7 fixes and covers the second opening 105, the positioning portion 16 may be located outside the housing 1, the first positioning surface 162 may be located outside the housing 1, and the positioning groove 106 may also be provided outside the housing 1.

[0122] Refer to Figures 2b, 11, 16, and 17. Multiple connecting components 8 exist. Each connecting component 8 includes a flexible buffer 82, a pressure sheet 84, a first fixing member 86, and a second fixing member 88. The flexible buffer 82 is fixed between the connecting portion 74 and the pressure sheet 84, and the connecting portion 74, flexible buffer 82, and pressure sheet 84 are stacked in order. The first fixing member 86 passes through the groove 742 (see Figure 14) in the pressure sheet 84 and the connecting portion 74 and is fixedly connected to one positioning post 18. The second fixing member 88 passes through the pressure sheet 84 and is fixedly connected to one connecting post 19. Both the first fixing member 86 and the second fixing member 88 apply force to the pressure sheet 84, and the pressure sheet 84 presses the connecting portion 74 against the first positioning surface 162, thereby achieving a fixed connection between the housing 1 and the curved mirror 7. Alternatively, the flexible buffer 82 may be located between the first fixing member 86 and the second fixing member 88. In another embodiment of the present application, the first fixing member 86 and the second fixing member 88 may pass through the flexible buffer 82, and the length of the flexible buffer 82 and the length of the pressure sheet 84 may be less than or equal to the length of the pressure sheet 84.

[0123] The flexible buffer 82 has elastic deformation capability. The flexible buffer 82 can reduce the possibility of damage to the connection 74 due to the pressure of the pressure sheet 84 being pressed firmly. Furthermore, the flexible buffer 82 can absorb vibrations, improve the vibration resistance of the optical display 10, and further improve the quality of the imaging light output by the optical display 10. The flexible buffer 82 may be made of rubber strip, foam, silicone rubber, or other elastomer material. In some embodiments of the present application, the hardness of the pressure sheet 84 is greater than the hardness of the flexible buffer 82. The pressure sheet 84 may be, but is not limited to, a sheet metal part, a die-cast part, or a plastic part.

[0124] The curved mirror 7 is pressed against the housing 1 using a pressure sheet 84, and the position of the curved mirror 7 is restricted between the housing 1 and the pressure sheet 84. This improves the positional stability of the curved mirror 7 on the housing 1, reduces the possibility of damage to the curved mirror 7 by large local forces, extends the service life of the curved mirror 7, and thereby helps to improve the reliability of use of the optical display 10.

[0125] In some embodiments of the present invention, the first fixing member 86 and the second fixing member 88 are screws. Threaded holes are provided in both the positioning post 18 and the connecting post 19. The first fixing member 86 is screw-connected to the positioning post 18, and the second fixing member 88 is screw-connected to the connecting post 19. The connecting post 19 may be, but is not limited to, a self-tapping stud, a hot-dip nut, or an in-mold decorative nut. Both the first fixing member 86 and the second fixing member 88 penetrate the pressing sheet 84 and are fixedly connected to the housing 1, pressing and fixing the curved mirror 7 to the housing 1. This improves the connection strength and stability between the curved mirror 7 and the housing 1.

[0126] In some embodiments of the present invention, the connecting portion 74 and the positioning projection 76 may be omitted, and the curved mirror 7 is fixed directly to the housing 1 using the connecting component 8.

[0127] In some embodiments of the present application, the positioning section 16, the first positioning surface 162, the positioning post 18, and the connecting post 19 may be omitted from the housing 1. The second fixing member 88 and the pressure sheet 84 may be omitted from the connecting component 8, and the flexible buffer 82 and the curved mirror 7 are fixed directly to the housing 1 using the first fixing member 86. For example, the first fixing member 86 may be fixedly connected to the housing 1 via the flexible buffer 82.

[0128] In some other embodiments of the present application, the means of transport may be a truck, motorcycle, bus, boat, helicopter, lawnmower, recreational vehicle, playground equipment, construction machinery, streetcar, golf cart, electric train, or trolley, etc. This is not particularly limited in the present application.

[0129] As shown in Figure 18a, in possible embodiments, the optical display 10 of the present invention is integrated into an in-vehicle display. The in-vehicle display may be installed on the back of a seat of the transport means 1000, or it may be installed in another location, such as the passenger seat. The location in which the in-vehicle display is installed is not limited in the present invention.

[0130] As shown in Figure 18b, the optical display 10 is integrated into the head-up display (HUD) of Figure 18b. The HUD can project navigation information, instrument information, etc., into the driver's forward field of view, preventing the driver from looking down to see the information (which affects driving safety). The transport means further includes a reflector 201 configured to project imaging light emitted from the HUD onto the outside of the transport means. The reflector 201 may be a windshield. After the imaging light emitted from the HUD is reflected by the reflector 201, a virtual image is formed on the outside of the transport means. Types of HUDs include, but are not limited to, windshield (W)-HUDs and augmented reality head-up displays (AR-HUDs). In Figure 18a, the optical display 10 partially protrudes from the back of the seat. Alternatively, the optical display may be fully embedded in the back of the seat, i.e., the optical display does not protrude from the back of the seat.

[0131] In yet another possible embodiment, the optical display 10 of the present invention may be alternatively integrated into a vehicle light. In addition to its illumination function, the vehicle light can also implement an Adaptive Driving Beam (ADB) that can project complex images such as text or traffic signs, and images such as video, to add driver assistance or entertainment functions.

[0132] Figure 19 is a functional diagram of a transport means according to one embodiment of the present invention.

[0133] The transport means may include various subsystems such as a sensor system 21, a control system 22, one or more peripheral devices 23 (one peripheral device is used as an example in the figure), a power supply 24, a computer system 25, and a display system 26. The aforementioned subsystems can communicate with each other. The display system 26 may include a display device provided in the embodiments of the present application. The transport means may further include another functional system such as an engine system or a cockpit that supplies power to the transport means. This is not limited to the present application.

[0134] The sensor system 21 may include several detection devices. These detection devices can sense measured information and convert the sensed information into electrical signals or other information in the required format based on specific output rules. Examples of detection devices, as shown in Figure 19, include, but are not limited to, a global positioning system (GPS), a vehicle speed sensor, an inertial measurement unit (IMU), a radar unit, a laser rangefinder, a camera device, a wheel speed sensor, a steering sensor, a gear sensor, or other elements used for automatic detection.

[0135] The control system 22 may include several elements, such as the steering unit, brake unit, lighting system, autonomous driving system, map navigation system, network time system, and obstacle avoidance system shown in the figure. The control system 22 can receive information transmitted from the sensor system 21 (such as vehicle speed and distance between vehicles) and realize functions such as autonomous driving and map navigation.

[0136] Optionally, the control system 22 may further include elements such as a throttle controller and an engine controller configured to control the vehicle's speed, but this is not limited to the present invention.

[0137] The peripheral device 23 may include several elements such as a communication system, a touchscreen, a user interface, a microphone, and a speaker. The communication system is configured to enable network communication between the means of transport and other devices. In practical applications, the communication system can enable network communication between the means of transport and other devices using wireless or wired communication technology. Wired communication technology may mean that the vehicle communicates with other devices via network cables or optical fibers, etc.

[0138] Power source 24 represents a system that supplies power or energy to a vehicle and may include, but is not limited to, rechargeable lithium batteries and lead-acid batteries. In practical applications, one or more battery modules within the power source are configured to supply electrical energy or energy for starting the vehicle. The type and materials of the power source are not limited herein.

[0139] Some functions of the transport system may be controlled and implemented by a computer system 25. The computer system 25 may include one or more processors 2501 (one processor is shown as an example in the figure) and memory 2502 (which may also be called a storage device). In practical applications, the memory 2502 may be located inside or outside the computer system 25 and may be used, for example, as a cache within the transport system. This is not limited to the present invention.

[0140] The processor 2501 may include one or more general-purpose processors, such as a graphics processing unit (GPU). The processor 2501 may be configured to execute related programs or instructions corresponding to programs stored in memory 2502 to realize corresponding functions of the vehicle.

[0141] Memory 2502 may include volatile memory, such as RAM. Alternatively, the memory may include non-volatile memory, such as ROM, flash memory, HDD, or solid-state drive (SSD). Alternatively, memory 2502 may include a combination of the aforementioned types of memory. Memory 2502 may be configured to store program code or a set of instructions corresponding to program code, and the processor 2501 invokes the program code or instructions stored in memory 2502 to implement the corresponding functions of the vehicle. In this application, memory 2502 may store a set of program code for controlling the vehicle. The processor 2501 may control the safe operation of the vehicle by invoking the program code. Methods for achieving safe operation of the vehicle are described in detail below in this application.

[0142] Optionally, in addition to storing program code or instructions, memory 2502 may also store information such as road maps, driving routes, and sensor data. The computer system 25 may implement vehicle-related functions by combining other elements of the vehicle's functional framework diagram, such as sensors in the sensor system and GPS. For example, the computer system 25 may control the direction of travel or the speed of travel of the means of transport based on data input from the sensor system 21, but this is not limited to the present invention.

[0143] The display system 26 can interact with other systems within the transport. For example, the display system 26 can display navigation information transmitted from the control system 22, or play back video transmitted from the computer system 25 and peripheral devices 23. For the specific structure of the display system 26, please refer to the embodiments of the display device described above. Further details will not be described again here.

[0144] The four subsystems shown in this embodiment, namely the sensor system 21, the control system 22, the computer system 25, and the display system 26, are merely examples and not limiting. In practical applications, a means of transport may combine several elements within the vehicle based on different functions to obtain subsystems containing corresponding different functions. In practical applications, a means of transport may include more or fewer systems or elements, and this is not limited herein.

[0145] The means of transport in the embodiments of this application may be known means of transport such as vehicles, aircraft, boats, or rockets, or they may be new means of transport that may emerge in the future. The vehicles may be electric vehicles, fuel cell vehicles, or hybrid powered vehicles, such as pure electric vehicles, long-range electric vehicles, hybrid electric vehicles, fuel cell vehicles, or new energy vehicles. This is not particularly limited in this application.

[0146] The optical display 10 is not limited to use in the transport means 1000 in this application, and the optical display 10 may also be used in other devices. In possible application scenarios, the optical display in this application is integrated into a Near Eye Display (NED) device, which may be, for example, an AR device or a VR device. An AR device may include, but is not limited to, AR glasses or an AR helmet. A VR device may include, but is not limited to, VR glasses or a VR helmet. See Figure 20, using AR glasses as an example. A user can wear the AR glasses device to play games, watch videos, participate in virtual meetings, or do video shopping.

[0147] In another possible application scenario, the optical display 10 in this application is integrated into a projector. See Figure 21. The projector can project images onto a wall or projection screen.

[0148] The application scenarios described above are merely examples. The optical displays provided herein may be further applied to other possible scenarios, such as medical devices, etc., but are not limited to these.

[0149] The orientation terms used herein, such as “up,” “down,” “front,” “rear,” “left,” “right,” “inside,” “outside,” and “sidewall,” are merely directions based on the accompanying drawings. Therefore, the orientation terms are used to better and more clearly describe and understand this application, rather than indicating or implying that the specified device or element has a particular orientation or needs to be constructed and operated in a particular orientation. This should not be understood as a limitation of this application.

[0150] Furthermore, in this specification, sequence numbers such as "first" and "second" of components are intended solely to distinguish the described objects and do not have any sequential or technical meaning. Unless otherwise specified, "connection" in this application includes direct and indirect connections.

[0151] The above description is merely a specific embodiment of the present application and does not limit the scope of protection of the present application. Any modifications or substitutions that a person skilled in the art would readily conceive of within the technical scope disclosed herein shall be included in the scope of protection of the present application. Accordingly, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. An optical display, and an optical display is, A housing provided with a first opening, A light source unit fixed to the housing and configured to emit imaging light, A transmission-reflection optical element fixed to the housing, covering the first opening, and configured to transmit and reflect the imaging light, The housing includes a curved mirror fixed to the housing and configured to reflect the imaging light, The imaging light emitted by the light source unit is reflected by the curved mirror via the transmissive-reflective optical element, and the curved mirror transmits the incident imaging light through the transmissive-reflective optical element to the outside of the housing. The aforementioned housing is A main housing, wherein the first opening is provided in the main housing, and both the light source unit and the curved mirror are fixed to the main housing, Includes a mounting portion that protrudes from the outer surface of the main housing, The aforementioned transmission-reflection optical element is fixedly connected to the mounting portion and is located outside the main housing. Optical display.

2. The aforementioned mounting portion is A mounting bottom wall that protrudes from the outer surface of the main housing and is arranged along the peripheral contour of the first opening, wherein the transmissive reflective optical element is fixed to the mounting bottom wall, and the mounting bottom wall and Includes a protective flange protruding from the mounting bottom wall, The optical display according to claim 1, wherein the protective flange surrounds at least a portion of the edge of the transmissive-reflective optical element.

3. The optical display according to claim 1, wherein the mounting surface is positioned on the mounting bottom wall, and the mounting surface is positioned parallel to the transmissive reflective optical element.

4. The mounting surface is positioned on the housing, the housing further includes a fixing post, the fixing post protruding from the mounting surface, The optical display according to claim 1, wherein the light source unit includes a connected light-emitting region and a non-light-emitting region, the light-emitting region being configured to emit the imaging light, and the non-light-emitting region being fixedly connected to the fixed post.

5. Positioning holes are provided in the non-luminescent region. The optical display according to claim 4, wherein the housing further includes a light source positioning post protruding from the mounting surface, the light source positioning post passing through the positioning hole.

6. The positioning hole includes a first positioning hole and a second positioning hole, the light source positioning post includes a first light source positioning post and a second light source positioning post, the first light source positioning post penetrates the first positioning hole, and the second light source positioning post penetrates the second positioning hole. The optical display according to claim 5, wherein, in the direction of arrangement of the first positioning hole and the second positioning hole, the length of the second positioning hole is longer than the length of the first positioning hole.

7. The optical display according to claim 4, wherein the light source unit is arranged parallel to the mounting surface.

8. The optical display according to claim 1, wherein a positioning surface is arranged on the housing and the curved mirror is fixedly connected to the positioning surface.

9. The optical display according to claim 1, wherein the housing includes a connected first portion and a second portion, the light source unit is fixed to the first portion, the curved mirror is fixed to the second portion, the second portion surrounds at least a portion of the first opening, and the transmissive reflective optical element is located in the second portion.

10. The optical display according to claim 9, wherein the light source unit is provided with a light-emitting surface, the transmissive-reflective optical element is provided with a reflective surface, and the light-emitting surface is arranged diagonally with respect to the reflective surface.

11. The first opening includes a first mounting edge and a second mounting edge arranged opposite to each other, The light source unit includes a light-emitting region, which includes a first light-emitting region edge and a second light-emitting region edge arranged opposite to each other. The optical display according to claim 1, wherein the first point on the first mounting edge and the second point on the second light-emitting area edge are located on a connecting line, the first light-emitting area edge is located on the first side of the connecting line, the second mounting edge is located on the second side of the connecting line, and the eye box of the optical display is located on the first side of the connecting line.

12. The optical display according to claim 1, wherein the housing further comprises a second opening communicating with the first opening, the curved mirror is located in the second opening, the optical display further comprises a cover which is detachably connected to the housing, and the cover covers the second opening.

13. A transport means comprising an optical display according to any one of claims 1 to 12, wherein the optical display is attached to the transport means.

14. The transport means according to claim 13, wherein the optical display is installed in the seat or instrument panel console of the transport means.

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