Optical displays and vehicles

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 priority to Chinese Patent Application No. 202210469117.9, entitled “OPTICAL DISPLAY AND TRANSPORT MEANS,” filed with the China National Intellectual Property Office on April 29, 2022, the entire contents of which are incorporated herein by reference.

[0002] FIELD OF THE DISCLOSURE This application relates to the field of optical display technology, and in particular to optical displays and vehicles. [Background technology]

[0003] An optical display is a device that uses optical imaging principles to achieve 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 commonly used optical displays, the light source unit and the optical elements such as the curved mirror are first attached to the respective frame bodies, and then fixed to the housing using the frame body, such intermediate connection impairs the precision of the optical path system of the optical display. Summary of the Invention

[0005] SUMMARY OF THE DISCLOSURE Embodiments of the present application provide optical displays and vehicles that allow for improved precision of optical paths.

[0006] According to a first aspect, the present application provides an optical display including 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 the imaging light. The curved mirror is fixed to the housing and configured to reflect the imaging light. The imaging light emitted from the light source unit is reflected to the curved mirror via the transmissive-reflection optical element, and the curved mirror transmits the incident imaging light to the outside of the housing via the transmissive-reflection optical element.

[0007] There is an assembly tolerance between the elements. If the number of elements in an optical display is large, the assembly precision may decrease. The assembly precision affects the precision of the optical path system of the optical display.

[0008] In the present application, the light source unit, the transflective optical element, and the curved mirror are directly fixed to the same housing without using a separate adapter (e.g., each fixed frame body), so that the number of elements 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 further improves the accuracy of the optical path system of the optical display, which helps to improve the output quality of the imaging light of the optical display.

[0009] According to the first aspect, in a possible embodiment, the housing includes a main housing and a mounting portion. 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. The mounting portion protrudes from an outer surface of the main housing. The transflective 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 in the internal cavity of the main housing, and the mounting part for fixing the transmission-reflection type optical element is disposed outside the main housing, so that the mounting part does not affect the internal optical path of the optical display, in other words, the mounting part does not affect the transmission of the imaging light in the main housing, thereby reducing the generation of stray reflected light of the optical display and improving the output quality of the imaging light of the optical display.

[0011] According to the first aspect, in a possible embodiment, 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 disposed along a peripheral contour of the first opening. The transmission reflection type optical element is fixed to the mounting bottom wall. The protective flange protrudes from the mounting bottom wall, and the protective flange surrounds at least a portion of an edge of the transmission reflection type optical element.

[0012] The protective flange surrounds the edge of the transmission-reflection type optical element to protect the transmission-reflection type optical element, reduce the possibility of the transmission-reflection type optical element being scratched or damaged, and further extend the service life of the transmission-reflection type optical element.

[0013] In addition, when the transmission reflection type optical element is made of transmission reflection glass, the edge of the transmission reflection type optical element is usually sharp. By using a protective flange to surround at least a part of the edge of the transmission reflection type optical element, the possibility that the edge of the transmission reflection type optical element will scratch or cut the user can be reduced, and the safety and reliability of the optical display can be improved.

[0014] According to the first aspect, in a possible embodiment, the mounting surface is disposed on the bottom mounting wall, and the mounting surface is disposed parallel to the transmission / reflection type optical element.

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

[0016] According to the first aspect, in a possible embodiment, the mounting surface is disposed on the housing. The housing further includes a fixing post, the fixing post protruding from the mounting surface. The light source unit includes a light-emitting region and a non-light-emitting region connected together. 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 fixing post.

[0017] The light source unit of the non-light emitting region is fixedly connected to the fixed post. The fixed post is fixed to the light source unit of the non-light emitting region and can pass through the light source unit of the non-light emitting region. Alternatively, a fastener such as a screw may pass through the light source unit of the non-light emitting region and the fixed post in sequence. The fastener is fixedly connected to the fixed post, thereby fixedly connecting the light source unit to the fixed post. The light source unit and the installation surface may be disposed close to each other or spaced apart.

[0018] Since the light source unit is fixedly connected to the fixed post via the non-light-emitting region, the imaging light output of the light source unit is not affected and the stability of the connection between the light source unit and the housing is improved.

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

[0020] According to the first aspect, in a possible embodiment, 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 an arrangement direction of the first positioning hole and the second positioning hole, a length of the second positioning hole is longer than a length of the first positioning hole.

[0021] In an ideal state, the shape of the positioning hole is adapted to the shape of the light source positioning post, and the set interval (design interval) between the two positioning holes is the same as the set interval 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, there is an error between the actual interval and the set interval between the two light source positioning posts due to inevitable manufacturing errors. In this case, the light source positioning post of the light source unit may not be installed in the corresponding positioning hole.

[0022] In the present application, in the arrangement direction of the first positioning hole and the second positioning hole, the length of the first positioning hole is longer than the length of the second positioning hole, and when the light source unit is assembled to the housing through the first positioning hole, an assembly margin is ensured. In other words, even if there is a difference between the actual interval between the first light source positioning post and the second light source positioning post and the set interval, the light source unit can be assembled to the housing. For example, even if the actual interval between the first light source positioning post and the second light source positioning post is larger than the set interval, 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 accuracy and manufacturing costs of the housing and the optical display are reduced.

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

[0024] The mounting surface is arranged parallel to the light source unit, and the position of the mounting 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 mounting surface can position the light source unit in the normal direction of the mounting surface, so that 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, a 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 and fixedly connected to each other.

[0027] The connection part 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 can position the curved mirror in the normal direction of the positioning surface, and the positioning post can position the connection part. This improves the assembly accuracy and assembly efficiency of the optical display, and facilitates the assembly of the curved mirror and the housing.

[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 each other in a first direction. The third edge and the fourth edge are arranged opposite each other. The first direction is different from the second direction. A connection portion protrudes from each of the first edge, the second edge, and the third edge, and each connection portion is fixedly connected to a corresponding one of the positioning surfaces.

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

[0030] According to the first aspect, in a possible implementation, the housing further includes a positioning post protruding from the positioning surface, the positioning post passing through the connection portion, thereby limiting movement of the curved mirror relative to the housing.

[0031] According to the first aspect, in a possible embodiment, the housing is provided with a positioning groove. The curved mirror includes a mirror body and a positioning protrusion protruding from an edge of the mirror body. The positioning protrusion is received 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 implementation, the housing includes a first portion and a second portion connected together, the light source unit is fixed to the first portion, the curved mirror is fixed to the second portion, and the second portion surrounds at least a portion of the first opening.

[0033] Because the light source unit is installed and accommodated in the first part, and the transmission reflection type optical element and the curved mirror are located in the second part, it is difficult for a user to see the light source unit located in the first part using the transmission reflection type optical element when viewing the optical display, that is, the light source unit is hidden in the first part, which helps to improve the user experience.

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

[0035] According to the first aspect, in a possible embodiment, the first opening includes a first mounting edge and a second mounting edge arranged opposite each other. The light source unit includes a light emitting area, and the light emitting area includes a first light emitting area edge and a second light emitting area edge arranged opposite each other. A first point on the first mounting edge and a second point on the second light emitting area edge are located on a connecting line. The first light emitting area edge is located on a first side of the connecting line. The second mounting edge is located on a 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 looks at the optical display, the user's eyes and the edge of the first light-emitting area are located on the same side of the connecting line, so the user cannot see the bright spot (bright spot) of the light source unit, thereby realizing anti-peeping and improving the user experience.

[0037] According to the first aspect, in a possible embodiment, the housing further includes a second opening communicating with the first opening. The curved mirror is located in the second opening. The optical display further includes a cover, the cover being detachably connected to the housing, the cover covering the second opening.

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

[0039] According to a second aspect, the present application provides a vehicle including an optical display as described above, the optical display being attached to the vehicle.

[0040] According to the second aspect, in a possible application scenario, 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 vision. In this way, the driver does not need to switch his / her gaze between the image and the road surface when looking down to see the information. This shortens crisis response time and improves driving safety.

[0041] In a possible application scenario, the optical display can be integrated into an in-vehicle display, which can be installed on the back of the seat, or on the passenger seat, etc. Users can use the optical display to watch videos, etc., thus improving the entertainment function of the vehicle.

[0042] In a possible application scenario, the optical display may be integrated into the vehicle lights. [Brief description of the drawings]

[0043] [Figure 1] FIG. 2 is an illustration of an application scenario for a vehicle according to an embodiment of the present application. [Figure 2a] 1 is a cross-sectional view of an optical display according to one embodiment of the present application. [Figure 2b] FIG. 2b is a three-dimensional exploded view of the optical display shown in FIG. 2a. [Diagram 3] FIG. 2 is a diagram of the virtual image formation principle of an optical display according to one embodiment of the present application. [Figure 4] FIG. 2 is a three-dimensional view of a housing for an optical display according to one embodiment of the present application. [Diagram 5] 1 is a cross-sectional view of a housing of an optical display according to one embodiment of the present application. [Figure 6] FIG. 2b is a partial enlarged view of area A in FIG. 2a. [Figure 7] FIG. 2B is a partial enlarged view of region B in FIG. 2A. [Figure 8a] FIG. 2 is a diagram of a housing for an optical display according to one embodiment of the present application. [Figure 8b]FIG. 2 is a three-dimensional view of a housing of an optical display according to an embodiment of the present application from another angle. [Figure 9] FIG. 2 is a plan view of a housing and a light source unit assembled together according to one embodiment of the present application. [Figure 10a] FIG. 2 is a diagram showing the arrangement of fixing posts and positioning posts on an installation surface according to one embodiment of the present application. [Figure 10b] FIG. 2 is a three-dimensional view of a housing from yet another angle according to an embodiment of the present application. [Figure 11] FIG. 2 is a three-dimensional exploded view of a housing and curved mirror according to one embodiment of the present application. [Figure 12] FIG. 2 is a plan view of a curved mirror according to one embodiment of the present application. [Figure 13] FIG. 2 illustrates a housing and curved mirror assembled together according to one embodiment of the present application. [Figure 14] FIG. 14 is a partial enlarged view of region C in FIG. [Figure 15a] 1A-1C are plan views of possible configurations of a curved mirror according to one embodiment of the present application. [Figure 15b] 1A-1C are plan views of possible configurations of a curved mirror according to one embodiment of the present application. [Figure 15c] 1A-1C are plan views of possible configurations of a curved mirror according to one embodiment of the present application. [Figure 15d] 1A-1C are plan views of possible configurations of a curved mirror according to one embodiment of the present application. [Figure 16] FIG. 13 illustrates another view of a three-dimensional assembly of a housing and a curved mirror according to an embodiment of the present application. [Figure 17] FIG. 2 is another cross-sectional view of an optical display according to an embodiment of the present application. [Figure 18a] FIG. 1 is a diagram of a partial structure of a vehicle according to one embodiment of the present application. [Figure 18b] 1A-1C are diagrams of possible implementations of integrating an optical display into a head-up display. [Figure 19] FIG. 1 is a diagram of the functioning of a vehicle according to the present application. [Figure 20]FIG. 1 illustrates a possible application scenario of an optical display according to an embodiment of the present application. [Figure 21] FIG. 2 is a diagram of another possible application scenario of an optical display according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0044] Please refer to Fig. 1. The embodiment of the present application provides a transportation means 1000. The transportation means 1000 in the embodiment of the present application may be a known transportation means such as a vehicle, an airplane, a ship, or a rocket, or may be a transportation means that will emerge in the future. The vehicle may be an electric vehicle, a fuel vehicle, or a hybrid powered vehicle, such as a pure electric vehicle, a long-distance 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 vehicle 1000 includes a cockpit 200 and seats installed in the cockpit 200. The seats include a first seat 300 and a second seat 500, and are used for passengers to ride in. In this embodiment, the first seat 300 is a front seat located in the cockpit 200. The second seat 500 is a rear seat located behind the first seat 300, and is used for passengers to ride 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 mounted 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 mounted on the front seat of the vehicle 1000 (as shown in FIG. 1), i.e., on an Instrument Panel (IP) console of the vehicle.

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

[0048] 2a and 2b, the optical display 10 includes a housing 1, a light source unit 3, a transflective optical element 5, a curved mirror 7, a connecting part 8, and a cover 9.

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

[0050] The imaging light emitted from the light source unit 3 is reflected to the curved mirror 7 via the transmission reflection type optical element 5, and the imaging light reflected by the curved mirror 7 is transmitted to the outside of the housing 1 via the transmission reflection type optical element 5. The light source unit 3 may be referred to as an image source. The transmission reflection type 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 a conventional optical display, optical elements such as a light source and a curved mirror are first fixed to respective fixed frame bodies and then assembled into a housing. In this case, there are many elements in the optical display. Since there is an assembly tolerance between the elements, a large number of elements may make it difficult to assemble the system / apparatus and may reduce the assembly accuracy.

[0052] However, in the present application, the light source unit 3, the transflective optical element 5, and the curved mirror 7 are each directly fixed to the same housing 1 without using a separate adapter (e.g., each fixed frame body), thereby reducing the number of elements of the optical display 10, reducing the difficulty of assembling the optical display 10, improving the assembly accuracy of the optical display 10, and simplifying the structure of the optical display 10. 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] Please refer to FIG. 3. In some embodiments of the present application, the curved mirror 7 transmits the imaging light to the outside of the housing 1 through the transflective optical element 5, and then the imaging light enters the eye 80, so that the eye 80 can see the enlarged virtual image. The virtual image can be observed by the eye without being received by a light screen. As shown in FIG. 3, the light source unit 3 emits imaging light L having a certain divergence angle. The imaging light L enters the eye 80 after being reflected by the transflective optical element 5 and the curved mirror 7. In this case, the brain tracks the light backward based on the experience of "straight propagation of light", and regards the point where the imaging light L extended backward intersects as an object point, i.e., a virtual image point. The position of the eye 80 may be called the eyebox position.

[0054] In another embodiment of the present application, the curved mirror 7 may project the imaging light onto a light screen (not shown) located outside the housing 1 after the imaging light passes through the transflective optical element 5. The light screen may be a wall, a projection screen, a wooden board, etc. The present application is not limited to a specific shape of the light screen.

[0055] In some embodiments of the present application, the housing 1 is a one-piece molded housing. In other embodiments of the present application, the housing 1 may be formed by assembling two or more parts.

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

[0057] The main housing 11 includes a first part 1101 (which may be considered as the upper part of the housing 1) and a second part 1103 (which may be considered as the lower part of the housing 1) that are connected. The cavity enclosed by the first part 1101 and the second part 1103 includes a first opening 103 (shown in FIG. 5 ) and a second opening 105 (which may also be referred to as 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 pass imaging light. The second opening 105 is configured to assemble the curved mirror 7. The light source unit 3 is fixedly accommodated in the first part 1101. The transflective optical element 5 and the curved mirror 7 are located in the second part 1103.

[0058] Because the light source unit 3 is installed and housed in the first portion 1101 and the transmission reflection type optical element 5 and the curved mirror 7 are located in the second portion 1103, it is difficult to view the light source unit 3 located in the first portion 1101 using the transmission reflection type optical element 5 when viewing the optical display 10. That is, the light source unit 3 is hidden within the first portion 1101. Stray light from the light source unit 3 does not directly reach the human eye via the transmission reflection type optical element 5, improving the user experience and the image quality of the optical display 10.

[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 to each other. An installation surface 1113 arranged facing the internal cavity of the main housing 11 is disposed on the first side wall 111 and configured to connect to the light source unit 3 (install the light source unit 3).

[0060] In some embodiments herein, the second portion 1103 includes a third sidewall 113, a fourth sidewall 114, and a fifth sidewall 115. The third sidewall 113 is fixedly connected between the fourth sidewall 114 and the fifth sidewall 115.

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

[0062] The fourth side wall 114 and the fifth side wall 115 are disposed opposite to 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 an 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 sidewall 111 , the third sidewall 113 , the fourth sidewall 114 , and the fifth sidewall 115 collectively form the second opening 105 .

[0063] Please refer to Fig. 6. The mounting portion 13 protrudes from the outer surface of the main housing 11 and is configured to fix the transmission reflection type optical element 5. Since the internal optical path of the optical display 10 is located inside the main housing 11 and the mounting portion 13 for fixing the transmission reflection type optical element 5 is disposed outside the main housing 11, 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 the imaging light inside the main housing 11, thereby reducing the generation of stray reflected light of the optical display 10 and improving the output quality of the imaging light of 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 a mounting surface 1320 is disposed on the mounting bottom wall 132 and configured to be fixedly connected to the transmission-reflection type 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 disposed along the peripheral contour of the first opening 103. The mounting surface 1320 is disposed obliquely with respect to the installation surface 1113 (see FIG. 5).

[0065] The transmission reflection type optical element 5 is fixedly connected to a mounting surface 1320 of the mounting bottom wall 132. The transmission reflection type optical element 5 is arranged parallel to the mounting surface 1320. The mounting surface 1320 is arranged parallel to the transmission reflection type optical element 5, and the position of the mounting surface 1320 corresponds to the position of the transmission reflection type optical element 5 in the optical path of the optical display 10. In the process of assembling the transmission reflection type optical element 5 and the housing 1, the mounting surface 1320 can position the transmission reflection type optical element 5 in the normal direction of the mounting surface 1320, thereby improving the positioning accuracy of the transmission reflection type 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 application, the transflective optical element 5 is bonded to the bottom mounting wall 132 using an adhesive. The adhesive may be a double-sided adhesive or may adopt an adhesive method.

[0067] In other embodiments of the present application, the transflective optical element 5 and the mounting surface 1320 may alternatively be arranged non-parallel.

[0068] In another embodiment of the present application, the mounting surface 1320 is disposed on an inner wall of the housing 1 and the transflective optical element 5 may alternatively be located inside the housing 1 .

[0069] The protective flange 134 protrudes from the bottom mounting wall 132 and is disposed along the periphery of the bottom mounting wall 132 to protect the edge of the transmission reflection type optical element 5. In some embodiments of the present application, the protective flange 134 is disposed around the transmission reflection type optical element 5 and surrounds the transmission reflection type optical element 5. In other embodiments of the present application, the protective flange 134 protrudes from a portion of the periphery of the bottom mounting wall 132 and protects the edge of the transmission reflection type optical element 5 in a segment or region, i.e., the protective flange 134 protects at least a portion of the edge of the transmission reflection type optical element 5.

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

[0071] In another embodiment of the present application, the mounting portion 13 may be omitted and the transflective optical element 5 may be fixed directly to the main housing 11, or the transflective optical element 5 may alternatively be housed within the main housing 11.

[0072] 7. The housing 1 further includes a fixing post 14 and a light source positioning post 15 protruding from the installation surface 1113. The fixing post 14 is fixedly connected to the light source unit 3.

[0073] The light source unit 3 may be arranged parallel to the installation surface 1113. The position of the installation 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 installation surface 1113 can position the light source unit 3 in the normal direction of the installation 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 application, the light source unit 3 and the installation surface 1113 may alternatively be arranged non-parallel.

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

[0075] See Figures 8a and 8b. The housing 1 further includes a positioning portion 16 disposed on an 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, and the plurality of positioning portions 16 are disposed on the inner wall of the main housing 11. The first side wall 111, the fourth side wall 114, and the fifth side wall 115 are each provided with a positioning portion 16 facing the inner wall of the internal cavity of the main housing 11. The positioning portion 16 is a substantially groove-like structure. For example, as shown in FIG. 8b, the positioning portion 16 of the first side wall 111 is a groove-like structure disposed on the first side wall 111 and located in 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 in 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 disposed facing the second opening 105 and configured to be attached to the curved mirror 7 so as to improve the assembly accuracy between the curved mirror 7 and the housing 1 .

[0077] The structure of the positioning portion 16 is not limited in the present application as long as the positioning portion 16 can position the curved mirror 7. For example, multiple protruding posts may protrude from the inner wall of the main housing 11. The multiple protruding posts surround one positioning portion 16, and the positioning portion 16 can limit the position of the curved mirror 7 on the housing 11.

[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 portions 16 can be located on the same plane. In other embodiments of the present application, the first positioning surfaces 162 of the multiple positioning portions 16 can be parallel to each other or not parallel to each other. In other embodiments of the present application, the normal direction of the first positioning surface 162 can be different from the normal direction of the second opening 105.

[0079] The housing 1 further includes an alignment post 18 protruding from the first alignment surface 162 and configured to position the curved mirror 7 .

[0080] The housing 1 further includes a connection post 19 protruding from the first alignment surface 162 , the connection post 19 being configured to be fixedly connected to the curved mirror 7 .

[0081] In other embodiments of the present application, the housing 1 may not be an integrally formed housing.

[0082] In another embodiment of the present application, 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 fix the light source unit 3, the transflective optical element 5, and the curved mirror 7, so that the optical display 10 can output imaging light.

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

[0084] According to the optical display 10 provided in the present 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, so that the relative positions of the light source unit 3, the transmissive reflective optical element 5, and the curved mirror 7 are determined according to optical principles, thereby ensuring the display effect of the optical display 10.

[0085] In some embodiments of the present application, the light source unit 3 uses a liquid crystal display (LCD) imaging technology. LCD imaging uses the principle of the photoelectric effect of liquid crystals. The alignment state of the liquid crystal molecules changes under the influence of an external electric field. The liquid crystal molecules in different alignment states can control the transmittance of light. For example, the liquid crystal molecules are between two polarizers whose polarization directions are perpendicular to each other. When no electric field is applied, the liquid crystal molecules can rotate the polarization direction of the 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 alignment state of the liquid crystal molecules changes, and the rotation angle of the polarized light also changes, and the intensity of the light passing through the second polarizer decreases. Each pixel of the LCD includes three primary colors. A color image is displayed by controlling the intensity of the three primary colors. The type of light source of the light source unit 3 is not limited in the present application. For example, the light source unit 3 may further use digital light processing (DLP) technology, or laser scanning projection, etc.

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

[0087] The non-light-emitting region 302 is disposed around the light-emitting region 301, and the non-light-emitting region 302 is provided with a fixing hole 31. The number of the fixing holes 31 corresponds to the number of the 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. Please refer to FIG. 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 the screws are fitted. After the screws penetrate the fixing holes 31, they are tightened into the screw holes of the fixing posts 14 and penetrate through them, so that the light source unit 3 is fixed to the fixing posts 14. The shape of the light source unit 3 is not limited in the present application. For example, the light source unit 3 may be circular or irregularly shaped, and the light source unit 3 may emit imaging light. In another embodiment of the present application, the fixing posts 14 may be fixed to the fixing holes 31 and may penetrate through the fixing holes 31.

[0088] The positioning hole 33 is provided with a non-light emitting area 302 and is configured to receive and place the light source positioning post 15 therethrough, 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 arrangement direction 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 holes 33 is adapted to the shape of the light source positioning posts 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 holes 33 are circular, and the light source positioning posts 15 are cylindrical. However, in reality, there will inevitably be manufacturing errors, which will result in an error between the actual interval between the two light source positioning posts 15 and the set interval. In this case, the light source positioning posts 15 of the light source unit 3 may not be attached to the corresponding positioning holes 33.

[0091] In the present application, in the arrangement direction 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, and an assembly margin is ensured when the light source unit 3 is assembled to the housing 1 via the first positioning hole 332. In other words, even if there is a difference between the actual interval and the set interval between the first light source positioning post 152 and the second light source positioning post 154, the light source unit 3 can be assembled to the housing 1. For example, even if the actual interval between the first light source positioning post 152 and the second light source positioning post 154 is larger than the set interval, 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 accuracy and manufacturing costs of the housing 1 and the optical display 10 are reduced.

[0092] In another embodiment of the present application, 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 installation surface 1113 of the first side wall 111. In the present application, the method of fixing the light source unit 3 to the housing 1 is not limited. For example, the light source unit 3 may be omitted from the non-light emitting region 302, and the light emitting region 301 of the light source unit 3 is 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 application, the light source unit 3 may alternatively be fixed to the outside of the housing 1. That is, the installation surface 1113 may be disposed on the outer surface of the housing 1. For example, a light-transmitting region may be disposed on a side wall of the housing 1, and the imaging light emitted from the light source unit 3 passes through the light-transmitting region and enters the internal cavity of the housing 1. The light-transmitting region may be a through hole or a transparent region.

[0094] Please refer to FIG. 9 and FIG. 3. The light-emitting region 301 includes a first light-emitting region edge 3011 and a second light-emitting region edge 3013 arranged opposite to each other. In some embodiments of the present application, the first light-emitting region edge 3011 is arranged at an end of the light-emitting region 301 that is close to the first opening 103. The second light-emitting region edge 3013 is arranged at an end of the light-emitting region 301 that is far from the first opening 103. The imaging light L includes imaging light L1 and imaging light L2. The imaging light of 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 transmission reflection type optical element 5 has a reflection surface. The light-emitting surface of the light source unit 3 is disposed obliquely with respect to the reflection surface of the transmission reflection type optical element 5, and no other optical element is required. The imaging light emitted from the light-emitting surface can be directly incident on the transmission reflection type optical element 5, thereby simplifying the internal optical path of the optical display 10 and the structure of the optical display 10.

[0096] Please refer to Fig. 3 and Fig. 10b. The first opening 103 includes a first mounting edge 1031 and a second mounting edge 1033 arranged opposite to each other. The first mounting edge 1031 is located at the edge of the end of the second side wall 112, which is remote from the second opening 105. The second mounting edge 1033 is located at the edge of the end of the third side wall 113, which is remote 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 area are located on the connecting line M. The first light-emitting area edge 3011 is located on a first side of the connecting line M, and the second mounting edge 1033 is located on a 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 located on the connecting line M, so that the eye 80 does not directly see the light-emitting area 301 (i.e., the bright point) of the light source unit 3 during normal viewing. This prevents the stray light of the light source unit 3 from being transmitted directly to the human eye via the transmission reflection type optical element 5 (in normal cases, the stray light is first reflected by the transmission reflection type optical element 5 to the curved mirror 7, then reflected by the curved mirror 7, and then enters the human eye via the transmission reflection type optical element 5). This improves the display effect of the optical display 10 and also improves the user experience.

[0097] 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 area edge 3011 of the light-emitting area 301 may be referred to as the upper edge of the light-emitting area 301, and the second light-emitting area edge 3013 may be referred to as the lower edge of the light-emitting area 301.

[0098] The transmission reflection type optical element 5 is an optical element that can transmit a part of the incident light incident on the transmission reflection type optical element 5 and reflect a part of the incident light. For example, the transmission reflection type optical element can transmit 50% of the incident light, and the transmission reflection type optical element can reflect 50% of the incident light. Alternatively, the transmission reflection type optical element can transmit 30% of the incident light, and the transmission reflection type optical element can reflect 70% of the incident light. The ratio of the incident light transmitted by the transmission reflection type optical element 5 to the total incident light can be selected based on requirements. The transmission reflection type optical element 5 can be made of glass, etc.

[0099] In this embodiment, curved mirror 7 is a reflecting mirror that conforms to the freeform surfaces required for optical imaging.

[0100] The surface of the optical element used in traditional optical design is a standard spherical surface. Usually, multiple spherical mirrors need to work together to correct the aberration. As a result, the optical structure of the optical element is complicated and occupies a large space.

[0101] With the development of the optical industry, the design and manufacturing technology of complex aspheric surfaces has been greatly improved. Aspheric surfaces are usually non-rotational aspheric surfaces, such as paraboloids, ellipsoids, involute surfaces, and hyperboloids with a rotation axis, as well as quadratic surfaces, higher-order surfaces, and off-axis aspheric surfaces. In various usage scenarios, one aspheric surface usually replaces two or more spherical surfaces to correct aberrations, simplify the optical structure, and realize the miniaturization and weight reduction of the optical path.

[0102] Compared with aspheric surfaces, free-form surfaces are more complex optical structures. The radius of curvature of each point on the surface is different, and the degree of freedom of the surface is very high. Free-form surfaces can not only replace multiple aspheric surfaces to correct aberrations, but also maximize optical quality and simplify optical structures. Optical free-form surfaces have complex structures, high degrees of freedom, and no clear expression regulations. In general, optical free-form surfaces refer to optical surfaces that do not have global rotational symmetry, do not have a unified optical axis, and have multiple radii of curvature on the entire surface.

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

[0104] Please refer to FIGS. 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 the connecting portion 74 is configured to be received in the positioning portion 16 and fixedly connected by coupling with the positioning portion 16. The positioning projection 76 protrudes from the mirror body 72, and the positioning projection 76 is received 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 arranged to face each other in a first direction (for example, the X direction shown in FIGS. 11 and 12). The third edge 726 and the fourth edge 728 are arranged to face each other in a second direction (for example, the Y direction shown in FIGS. 11 and 12), and 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 FIGS. 11 and 12), 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 orthogonal to the second direction, the first direction is orthogonal to the third direction, and the second direction is orthogonal to the third direction. The first edge 722 is arranged on the side where the mirror body 72 is adjacent to the fourth side wall 114. The second edge 724 is arranged on the side where the mirror body 72 is adjacent to the fifth side wall 115. The third edge 726 is arranged on the side where the mirror body 72 is adjacent to the first side wall 111. The fourth edge 728 is arranged 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, that is, in the direction 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 FIGS. 1 and 3).

[0106] In some embodiments of the present application, there are multiple connection portions 74. Each connection portion 74 is accommodated in a corresponding one of the positioning portions 16 and is fixedly connected to the 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 accommodated in a corresponding one of the positioning portions 16. Each connecting portion 74 is fixedly connected to the first positioning surface 162 of the positioning portion 16 using the connecting parts 8. In this embodiment, one connecting portion 74 protrudes from each of the first edge 722 and the second edge 724, 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 connection portions 74 on the first edge 722, the connection portions 74 on the second edge 724, and the connection portions 74 on the third edge 726 cooperate with corresponding positioning portions 16, thereby enabling the curved mirror 7 to be positioned on the main housing 11.

[0109] Each connecting portion 74 is further provided with a groove 742 penetrating the connecting portion 74 in the third direction, and the groove is configured to penetrate and position the positioning post 18. See Figures 13 and 14. Each positioning post 18 on the housing 1 is configured to penetrate the groove 742 of one connecting portion 74 and position the connecting portion 74. This facilitates the 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 FIG. 12 ), which is pressed or attached to the first positioning surface 162, is disposed on the side of each connection portion 74 facing the first positioning surface 162. A reflective layer (e.g., a reflective coating) is disposed on the curved mirror 7 to form a reflective surface that reflects the imaging light. The reflective surface may be located on the side of the curved mirror 7 facing the second opening 105, or the reflective surface may be located on the side of the curved mirror 7 away from the second opening 105, i.e., facing the first opening 103. The second positioning surface 740 may or may not be provided with a reflective layer. The first positioning surface 162 and the second positioning surface 740 are parallel and pressed against each other to realize the positioning of the curved mirror 7 in the third direction and restrict the curved mirror 7 from rotating around the first direction and the second direction. In some embodiments of the present application, the second alignment surfaces 740 of the multiple connections 74 are coplanar. In other embodiments of the present application, the first alignment surface 162 and the second alignment surface 740 may be non-parallel, and the second alignment surfaces 740 of the multiple connections 74 may be parallel or non-parallel.

[0111] The curved mirror 7 is positioned in three directions and rotation around the three directions of the curved mirror 7 is also limited by cooperation between the connecting portions 74 arranged on the edge of the mirror body 72 and the corresponding positioning portions 16. This further improves the positional stability of the curved mirror 7 with respect 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 coefficient of the curved mirror and that of other fitting components (e.g., housing) of the optical display are usually different. Therefore, when the ambient temperature changes significantly, the curved mirror is easily deformed due to the pressure of other fitting components. Take the curved mirror and the housing as an example. When the ambient temperature of the optical display exceeds a set temperature (e.g., 70°C), the curved mirror and the housing may deform due to thermal expansion, and the housing may press the curved mirror. When the curved mirror is deformed, the optical path of the imaging light reflected at the deformed part will be distorted, which will ultimately affect the output quality of the imaging light of the optical display.

[0113] In some embodiments of the present application, the curved mirror 7 has a thermal expansion coefficient different from that of the housing 1. Due to the thermal expansion coefficients of the housing 1 and the curved mirror 7, there is a reserved gap 700 (shown in FIG. 14 ) 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 connection portion 74) to ensure a thermal expansion space of the curved mirror 7 and the housing 1. This reduces the possibility that the curved mirror 7 will be deformed by compression, and improves the optical path stability of the optical display 10.

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

[0115] The second reserve gap 702 is provided between the inner wall of the groove 742 of each connection portion 74 and the corresponding positioning post 18, and ensures a thermal expansion space 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 thermal expansion degree of the curved mirror 7 in the first direction may be greater than the thermal expansion degree of the curved mirror 7 in the second direction. The positioning portion 16 of the fourth side wall 114 and the corresponding connection portion 74 are used as an example. In the first direction, the second reserve gap 702 exists between a part of the inner wall of the groove 742 and the corresponding positioning post 18. In the second direction, a part of the inner wall of the groove 742 is in close contact with the corresponding positioning post 18, which reduces the possibility of deformation of the curved mirror 7 caused by thermal expansion and improves 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 equal to or greater than the length of the mirror body 72 in the second direction.

[0116] 12, the positioning protrusion 76 protrudes from the fourth edge 728 of the mirror body 72, and the positioning protrusion 76 is accommodated 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 can improve the assembly efficiency and assembly accuracy when assembling the curved mirror 7 to the housing 1. The shape of the positioning protrusion 76 can be a square or a cone, etc. The shape of the positioning protrusion 76 is not limited in the present application. In another embodiment of the present application, the positioning protrusion 76 may be accommodated in the positioning groove 106.

[0117] The number and positions of the connectors 74 on the curved mirror 7 are not limited in the present application, and the number and positions of the positioning protrusions 76 on the edges of the mirror body 72 are not limited in the present application. For example, as shown in FIG. 15a, in a possible embodiment, the connectors 74 on the third edge 726 may be omitted, the connectors 74 on the first edge 722 may be disposed near the third edge 726, the connectors 74 on the second edge 724 may be disposed near the third edge 726, and two connectors 74 may protrude from the fourth edge 728. As shown in FIG. 15b, in a possible embodiment, the positioning protrusions 76 on the fourth edge 728 may be omitted, and the connectors 74 are not disposed on the fourth edge 728. As shown in FIG. 15c, in a possible embodiment, the connectors 74 on the first edge 722 may be omitted, and the connectors 74 on the second edge 724 may be omitted. The positioning protrusions 76 are disposed on the third edge 726 and the fourth edge 728, respectively. The curved mirror 7 is fixed to the housing by fixing the positioning protrusions 76 in the positioning grooves 106. As shown in Fig. 15d, in a possible embodiment, the positioning protrusions 76 are disposed 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 application, the locating post 18, the locating portion 16, and the 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 the present 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 the connecting portions 74 is not limited. For example, in another embodiment of the present application, the mirror body 72 may be circular, the mirror body 72 may have one edge, the connecting portion 74 may be one, and the connecting portion 74 protrudes from the mirror body 72.

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

[0121] In another embodiment of the present application, the curved mirror 7 is not housed in the internal cavity of the main housing 11, the curved mirror 7 is fixed and covers the second opening 105, the positioning portion 16 may be disposed 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] Please refer to FIG. 2b, FIG. 11, FIG. 16, and FIG. 17. There are a plurality of connection parts 8. Each connection part 8 includes a flexible buffer 82, a pressing sheet 84, a first fixing member 86, and a second fixing member 88. The flexible buffer 82 is fixed between the connection part 74 and the pressing sheet 84, and the connection part 74, the flexible buffer 82, and the pressing sheet 84 are stacked in order. The first fixing member 86 penetrates the pressing sheet 84 and the groove 742 (see FIG. 14) of the connection part 74, and is fixedly connected to one positioning post 18. The second fixing member 88 penetrates the pressing sheet 84 and is fixedly connected to one connection post 19. Both the first fixing member 86 and the second fixing member 88 apply a force to the pressing sheet 84, and the pressing sheet 84 presses the connection part 74 against the first positioning surface 162 to realize 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 pressing sheet 84 may be equal to or less than the length of the pressing sheet 84.

[0123] The flexible buffer 82 has elastic deformation ability. The flexible buffer 82 can reduce the possibility that the connection 74 is damaged due to the pressing sheet 84 being pressed too hard. In addition, 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 strips, foam, silicone rubber, or other elastomeric materials. In some embodiments of the present application, the hardness of the pressing sheet 84 is greater than that of the flexible buffer 82. The pressing sheet 84 can be selected as, but not limited to, a sheet metal part, a die-casting part, or a plastic part.

[0124] The curved mirror 7 is pressed against the housing 1 using a pressing sheet 84, and the position of the curved mirror 7 is limited between the housing 1 and the pressing sheet 84. This improves the positional stability of the curved mirror 7 on the housing 1, reduces the possibility that the curved mirror 7 will be damaged by a large local force, and extends the service life of the curved mirror 7, thereby helping to improve the usage reliability of the optical display 10.

[0125] In some embodiments of the present application, the first fixing member 86 and the second fixing member 88 are screws. Both the positioning post 18 and the connecting post 19 are provided with screw holes. 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 can be, but is not limited to, a self-tapping stud, a high-temperature melting 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, so as to press and fix the curved mirror 7 to the housing 1. This improves the connection strength and connection stability between the curved mirror 7 and the housing 1.

[0126] In some embodiments of the present application, the connection parts 74 and the positioning protrusions 76 may be omitted and the curved mirror 7 is fixed directly to the housing 1 using the connection parts 8 .

[0127] In some embodiments of the present application, the positioning portion 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 pressing sheet 84 may be omitted from the connecting part 8, and the flexible buffer 82 and the curved mirror 7 are directly fixed 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 vehicle may be a truck, motorcycle, bus, boat, helicopter, lawn mower, recreational vehicle, playground equipment, construction equipment, streetcar, golf cart, train, trolley, etc., but is not limited to this in the present application.

[0129] As shown in Fig. 18a, in a possible embodiment, the optical display 10 of the present application is integrated into an in-vehicle display. The in-vehicle display may be mounted on the back of a seat of the vehicle 1000, or the in-vehicle display may be mounted in another location, such as the passenger seat. The location where the in-vehicle display is mounted is not limited by the present application.

[0130] As shown in FIG. 18b, the optical display 10 is integrated into a head-up display (HUD) in FIG. 18b. The HUD can project navigation information, instrument information, etc., into the driver's forward viewing angle, preventing the driver from looking down to see the information (which affects driving safety). The vehicle further includes a reflector 201 configured to project imaging light emitted from the HUD to the outside of the vehicle. 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 outside the vehicle. Types of HUD include, but are not limited to, windshield (W)-HUD, augmented reality head-up display (AR-HUD), etc. In FIG. 18a, the optical display 10 partially protrudes from the back of the seat. The optical display may alternatively 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 application may alternatively be integrated into vehicle lights that, in addition to illumination functions, can also project complex images such as text or traffic signs, and realize an Adaptive Driving Beam (ADB) that can project images such as videos to add driving assistance or entertainment functions.

[0132] FIG. 19 is a functional diagram of a vehicle according to one embodiment of the present application.

[0133] The transportation means can 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 can include the display device provided in the embodiments of the present application. The transportation means may further include another functional system such as an engine system or a cockpit that supplies power to the transportation means. This is not limited in the present application.

[0134] The sensor system 21 can include several detection devices. The detection device can sense the measured information and convert the sensed information into an electrical signal or other information in a required format based on specific output rules. As shown in FIG. 19, the detection devices 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 in the present application.

[0135] The control system 22 can include several elements such as the steering unit, the brake unit, the lighting system, the autonomous driving system, the map navigation system, the network time system, and the obstacle avoidance system shown in the figure. The control system 22 can receive the information (such as vehicle speed and inter-vehicle distance) transmitted from the sensor system 21 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 driving speed of the vehicle, etc., but this is not limited in the present application.

[0137] The peripheral device 23 may include several elements such as a communication system, a touch screen, a user interface, a microphone, and a speaker. The communication system is configured to realize the network communication between the vehicle and other devices other than the vehicle. In practical applications, the communication system can realize the network communication between the vehicle and other devices using wireless communication technology or wired communication technology. The wired communication technology may mean that the vehicle communicates with other devices via a network cable, or optical fiber, etc.

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

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

[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 associated programs or instructions corresponding to programs stored in the memory 2502 to implement corresponding functions of the vehicle.

[0141] The memory 2502 may include a volatile memory, such as a RAM. The memory may alternatively include a non-volatile memory, such as a ROM, a flash memory, a HDD, or a solid-state drive SSD. The memory 2502 may alternatively include a combination of the aforementioned types of memory. The memory 2502 may be configured to store a program code or a set of instructions corresponding to the program code, and the processor 2501 calls the program code or instructions stored in the memory 2502 to realize the corresponding function of the vehicle. In the present application, the memory 2502 may store a set of program code for controlling the vehicle. The processor 2501 may control the safe driving of the vehicle by calling the program code. A method for realizing the safe driving of the vehicle will be specifically described below in the present application.

[0142] Optionally, in addition to storing program codes or instructions, the memory 2502 may further store information such as road maps, driving routes, and sensor data. The computer system 25 may combine other elements of the vehicle's functional framework diagram, such as sensors in the sensor system and GPS, to realize vehicle-related functions. For example, the computer system 25 may control the driving direction or driving speed of the vehicle based on the data input of the sensor system 21, but this is not limited to this application.

[0143] The display system 26 can interact with other systems in the vehicle. For example, the display system 26 can display navigation information transmitted from the control system 22, or play videos transmitted from the computer system 25 and the peripherals 23. For the specific structure of the display system 26, please refer to the above-mentioned display device embodiment. The 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 are not limiting. In practical applications, the vehicle may combine some elements in the vehicle based on different functions to obtain subsystems with corresponding different functions. In practical applications, the vehicle may include more or less systems or elements, which is not limited in this application.

[0145] The vehicle in the embodiment of the present application may be a known vehicle, such as a car, an airplane, a boat, or a rocket, or may be a new vehicle that will emerge in the future. The vehicle may be an electric vehicle, a fuel vehicle, or a hybrid-powered vehicle, such as a pure electric vehicle, a long-distance electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, or a new energy vehicle, which is not particularly limited in the present application.

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

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

[0148] The above application scenarios are merely examples, the optical display provided in this application may further be applied to other possible scenarios, such as medical devices, which are not limited in this application.

[0149] Orientation terms referred to in this application, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and "sidewall", are merely directions based on the accompanying drawings. Thus, orientation terms are used to better and more clearly describe and understand this application, rather than indicating or implying that a specified device or element has a particular orientation and must be constructed and operated in a particular orientation. Thus, 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 only intended to distinguish the objects described and have no sequential or technical meaning. Unless otherwise specified, "connected" in this application includes direct connection and indirect connection.

[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 replacements that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application shall be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. 1. An optical display, comprising: a housing having a first opening; a light source unit secured to the housing and configured to emit imaging light; a transflective optical element secured to the housing, covering the first opening, and configured to transmit and reflect the imaging light; a curved mirror secured 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 transmission reflection type optical element, and the curved mirror transmits the incident imaging light to the outside of the housing via the transmission reflection type optical element. Optical display.

2. The housing includes: a main housing, the first opening being provided in the main housing, and both the light source unit and the curved mirror being fixed to the main housing; a mounting portion protruding from an outer surface of the main housing, The optical display of claim 1 , wherein the transflective optical element is fixedly connected to the mounting portion and located outside the main housing.

3. The mounting portion is a mounting bottom wall protruding from the outer surface of the main housing and disposed along a peripheral contour of the first opening, the transmission-reflection type optical element being fixed to the mounting bottom wall; a protective flange protruding from the bottom mounting wall; The optical display of claim 2 , wherein the protective flange surrounds at least a portion of an edge of the transflective optical element.

4. The optical display according to claim 2 or 3, wherein a mounting surface is disposed on the bottom mounting wall, the mounting surface being disposed parallel to the transmission-reflection type optical element.

5. a mounting surface disposed on the housing, the housing further including a fastening post, the fastening post protruding from the mounting surface; The optical display of claim 1 , wherein the light source unit includes connected emissive and non-emissive regions, the emissive regions configured to emit imaging light, and the non-emissive regions fixedly connected to the fixed posts.

6. The non-light emitting region is provided with a positioning hole, The optical display of claim 5 , 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.

7. 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 extends through the first positioning hole, and the second light source positioning post extends through the second positioning hole; The optical display according to claim 6 , wherein a length of the second positioning hole is longer than a length of the first positioning hole in an arrangement direction of the first positioning hole and the second positioning hole.

8. The optical display according to claim 5 , wherein the light source unit is disposed parallel to the installation surface.

9. The optical display of claim 1 , wherein an alignment surface is disposed on the housing, and the curved mirror is fixedly connected to the alignment surface.

10. 2. The optical display of claim 1, wherein the housing includes a first portion and a second portion connected together, 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 transflective optical element is located in the second portion.

11. The optical display according to claim 10 , wherein the light source unit is provided with a light emitting surface, the transmission / reflection type optical element is provided with a reflection surface, and the light emitting surface is disposed obliquely with respect to the reflection surface.

12. the first opening includes a first mounting edge and a second mounting edge disposed opposite each other; The light source unit includes a light emitting region, the light emitting region including a first light emitting region edge portion and a second light emitting region edge portion disposed opposite each other; 12. An optical display as claimed in any one of claims 1 to 11, wherein a first point on the first mounting edge and a second point on the second light-emitting area edge are located on a connecting line, the first light-emitting area edge is located on a first side of the connecting line, the second mounting edge is located on a second side of the connecting line, and an eyebox of the optical display is located on the first side of the connecting line.

13. 12. The optical display of claim 1, wherein the housing further includes a second opening communicating with the first opening, the curved mirror is positioned in the second opening, and the optical display further includes a cover, the cover being removably connected to the housing, the cover covering the second opening.

14. 14. A vehicle comprising an optical display according to any one of claims 1 to 13, said optical display being attached to the vehicle.

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