CN116165808A

CN116165808A - Stereoscopic display device, stereoscopic display system, and vehicle

Info

Publication number: CN116165808A
Application number: CN202211091077.5A
Authority: CN
Inventors: 王金蕾; 邹冰; 秦振韬
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2023-05-26
Also published as: CN117518518A; WO2024021852A1

Abstract

The application provides a stereoscopic display device, which is applied to the field of display. The stereoscopic display apparatus includes a light source device and an optical element. The light source device is used for outputting an original light beam to the optical element. The optical element is used for obtaining a first light beam according to the original light beam at a first position. The optical element is used for changing the transmission direction of the original light beam at the second position to obtain a second light beam. The stereoscopic display apparatus further comprises a spatial light modulator or a diffusion screen. The spatial light modulator is used for modulating the first light beam and the second light beam according to different image information to obtain two paths of imaging light. The diffusion screen is used for diffusing the first light beam and the second light beam carrying different image information to obtain two paths of imaging light. In the application, by adding the optical element, the same light source device can be shared, so that the cost of the stereoscopic display device is reduced.

Description

Stereoscopic display device, stereoscopic display system, and vehicle

This application is a divisional application, the filing number of the original application being CN202210892814.5, the filing date of the original application being 2022, 7 months 27, the entire contents of the original application being incorporated herein by reference.

Technical Field

The present disclosure relates to the field of display, and more particularly, to a stereoscopic display device and a vehicle including the stereoscopic display device.

Background

Stereoscopic display requires providing both eyes with image information carrying different parallaxes. Compared with 2D display, stereoscopic display can give better experience to people.

The autostereoscopic display technique is also a stereoscopic display scheme in which the user does not need to wear polarized glasses or shutter glasses. The stereoscopic display device outputs two paths of imaging light to left and right eyes of a user, respectively. Specifically, the stereoscopic display apparatus includes 2 light source devices and 1 spatial light modulator. The 2 light source devices are used for outputting two paths of light beams to the spatial light modulator in a time sharing mode. The spatial light modulator is used for modulating two paths of light beams according to different image information to obtain two paths of imaging light. The two paths of imaging light output by the spatial light modulator are respectively irradiated to the left eye and the right eye of the user. The two imaging light paths carry different image information. Thereby providing a stereoscopic visual enjoyment to the user.

In practical applications, the cost of the stereoscopic display device is high.

Disclosure of Invention

The application provides a stereoscopic display device, a stereoscopic display system and a vehicle, wherein the same light source device can be shared by adding optical elements, so that the cost of the stereoscopic display device is reduced.

The first aspect of the application provides a stereoscopic display device. The stereoscopic display apparatus includes a light source device and an optical element. The light source device is used for outputting an original light beam to the optical element. The optical element is used for obtaining a first light beam according to the original light beam at a first position. The optical element is used for changing the transmission direction of the original light beam at the second position to obtain a second light beam. The stereoscopic display apparatus further comprises a spatial light modulator or a diffusion screen. The spatial light modulator is used for modulating the first light beam and the second light beam according to different image information to obtain two paths of imaging light. The diffusion screen is used for diffusing the first light beam and the second light beam carrying different image information to obtain two paths of imaging light.

In an alternative form of the first aspect, the position of the light source device relative to the spatial light modulator or the diffuser screen is fixed. The first light beam and the second light beam output by the optical element have an overlapping region. A spatial light modulator or diffuser screen is located in the overlap region. In the present application, the optical element is moved by a moving mechanism. By moving the optical element, the light source device is fixed, the complexity of the moving mechanism can be reduced, thereby reducing the cost of the moving mechanism.

In an alternative form of the first aspect, the light source device is configured to output the first original light beam at the third position. Outputting the second original beam at a fourth location. The optical element is used for obtaining a first light beam at a first position according to the first original light beam. The optical element is used for changing the transmission direction of the second original light beam at the second position to obtain a second light beam. Wherein the offset of the third position and the first position is different from the offset of the fourth position and the second position. By moving the optical element and the light source device, the first light beam and the second light beam irradiation region can be made to overlap as much as possible. When the spatial light modulator is located in the overlapping region, waste of light beams can be reduced. Therefore, the application can improve the utilization rate of the light beam.

In an alternative form of the first aspect, the third and fourth positions lie in a first plane. The light source device is configured to move from a third position to a fourth position via the first path. The first path is parallel to the first straight line. The first straight line is located on the first plane. By linearly moving the light source device, the complexity of the moving mechanism can be reduced and the need for moving space can be reduced compared to a curved moving light source device. Therefore, the cost of the stereoscopic display device can be reduced and the user experience can be improved.

In an alternative form of the first aspect, the first and second positions lie in a second plane, and the optical element is adapted to move from the first position to the second position via a second path. The second path is parallel to the second straight line. The second straight line is located on the second plane. By linearly moving the optical element, the complexity of the movement mechanism can be reduced and the need for movement space reduced compared to moving the optical element in a curve. Therefore, the cost of the stereoscopic display device can be reduced and the user experience can be improved.

In an alternative form of the first aspect, the first plane and the second plane are parallel. The first path and the second path are parallel. The length of the second path is less than the length of the first path. When the length of the second path is smaller than that of the first path, the irradiation areas of the two light beams can be overlapped as much as possible. When the spatial light modulator is located in the overlap region, waste of light beams is reduced. Therefore, the application can improve the utilization rate of the light beam.

In an alternative form of the first aspect, the optical element is further adapted to change the divergence angle of the original beam at the second position to obtain the second beam.

In an alternative form of the first aspect, the optical element is configured to increase the spread angle of the original beam to obtain the second beam. By increasing the spread angle of the original beam, the distance between the light source device and the spatial light modulator can be reduced. Therefore, the size of the stereoscopic display device can be reduced, and user experience is improved.

In an alternative form of the first aspect, the optical element is a variable focus device. When the optical element is a variable-focus device, the optical element can adjust the focal length according to the distance between the user and the diffusion screen, so that the user experience is improved.

In an alternative form of the first aspect, the optical element is configured to move between M positions to output the M beams at different angles. The M light beams include a first light beam and a second light beam. The M positions include a first position and a second position. M positions are in one-to-one correspondence with the M light beams, and M is an integer greater than 1. By moving between the M positions, the number of backlight assemblies can be reduced while providing more viewing positions. Therefore, the cost of the stereoscopic display device can be reduced.

In an alternative form of the first aspect, the stereoscopic display device further includes an eye tracking module. The human eye tracking module is used for acquiring M viewpoints. The M viewpoints and the M positions are in one-to-one correspondence. The optical element is for moving between M positions of the N positions according to the M viewpoints. The N positions correspond to N views. Only M of the N views may have users. By moving only between M positions, the image frame rate of a single user can be increased. Therefore, the user experience can be improved.

In an alternative form of the first aspect, N has a value in the range of 2 to 10. When the N value is excessively large, the image frame rate of a single user may be reduced. Therefore, the image frame rate of a single user can be improved by limiting the value of N, so that the user experience is improved.

In an alternative form of the first aspect, the stereoscopic display apparatus includes K light source devices and K optical elements. K is an integer greater than 1. The K light source devices and the K optical elements are in one-to-one correspondence. The K optical elements are used for outputting 2 XK beams, and the output angles of the 2 XK beams are different. The 2 x K beam includes a first beam and a second beam. The spatial light modulator is used for modulating 2 XK beams to obtain 2 XK imaging light. The 2 x K path imaging light includes two beams of imaging light. The diffusion screen is used for diffusing the 2 XK beam to obtain 2 XK imaging light. In the present application, by introducing K backlight assemblies, more viewing positions can be provided. Therefore, the user experience can be improved.

In an alternative form of the first aspect, the direction of movement of each of the K optical elements during movement is the same. When the moving direction of each backlight assembly is the same, the complexity of the moving mechanism can be reduced, thereby reducing the cost of the stereoscopic display device.

In an alternative form of the first aspect, the optical element is arranged to change the direction of transmission of the original beam by transmission at the second location to obtain the second beam.

In an alternative form of the first aspect, the backlight assembly does not output a light beam during movement of the backlight assembly from the first position to the second position or from the second position to the first position. The beams output during movement may generate crosstalk, thereby affecting the user experience. Therefore, the user experience can be improved.

A second aspect of the present application provides a stereoscopic display device. The stereoscopic display apparatus includes a first light source device, a first optical element, a second light source device, and a second optical element. The first light source device and the second light source device are arranged in parallel. The first light source device is used for outputting a first original light beam to the first optical element. The first optical element is used for obtaining a first light beam according to the first original light beam. The second light source device is used for outputting a second original light beam to the second optical element. The second optical element is used for changing the transmission direction of the second original light beam to obtain a second light beam. The stereoscopic display apparatus further comprises a spatial light modulator or a diffusion screen. The spatial light modulator is used for modulating the first light beam and the second light beam according to different image information to obtain two paths of imaging light. The diffusion screen is used for diffusing the first light beam and the second light beam carrying different image information to obtain two paths of imaging light.

In this application, by introducing the optical element, in the case where the first light source device and the second light source device are arranged in parallel, the irradiation regions of the first light beam and the second light beam can be made to overlap as much as possible. The two light source devices arranged in parallel occupy a smaller space. Therefore, the size of the stereoscopic display device can be reduced, and user experience is improved.

In an alternative form of the second aspect, the stereoscopic display apparatus includes K light source devices and K optical elements. K is an integer greater than 2. The K light source devices are arranged in parallel. The K light source devices include a first light source device and a second light source device. The K light source devices are used for outputting K original light beams. The K optical elements are used for changing the transmission directions of the K original light beams to obtain K light beams. The spatial light modulator is used for modulating K light beams to obtain K paths of imaging light. The diffusion screen is used for diffusing the K light beams to obtain K paths of imaging light. The 2 imaging light paths in the K imaging light paths are a group. The 2 imaging light paths in a set of imaging light carry different image information.

In an alternative form of the second aspect, the first distance between the first optical element and the second optical element is smaller than the second distance between the first light source device and the second light source device. When the first distance is smaller than the second distance, the irradiation areas of the two light beams can be overlapped as much as possible. When the spatial light modulator or the diffusion screen is located in the overlapping area, waste of light beams can be reduced. Therefore, the application can improve the utilization rate of the light beam.

In an alternative form of the second aspect, the first optical element is further configured to change the divergence angle of the first original beam to obtain the first beam. The second optical element is also used for changing the divergence angle of the second original light beam to obtain a second light beam.

In an alternative form of the second aspect, the first optical element is configured to increase a spread angle of the first original light beam to obtain the first light beam. The second optical element is used for increasing the diffusion angle of the second original light beam to obtain a second light beam.

In an alternative form of the second aspect, the first optical element and/or the second optical element is a variable focus device.

In an alternative form of the second aspect, the first optical element is configured to change the transmission direction of the first original light beam by transmission to obtain the first light beam. The second optical element is used for changing the transmission direction of the second original light beam through transmission to obtain a second light beam.

A third aspect of the present application provides a stereoscopic display system. The stereoscopic display system comprises a curved mirror and the stereoscopic display device according to the first aspect, any one of the foregoing first aspect, the second aspect or any one of the second aspect. The stereoscopic display device is used for outputting two paths of imaging light. The curved mirror is used for reflecting two paths of imaging light, and an included angle exists between the two paths of reflected imaging light. The focal length of the curved mirror is f. The spatial light modulator or diffuser is spaced from the curved mirror by a distance d. d is less than f. The curved mirror can amplify two paths of imaging light, so that the distance between a user and the diffusion screen can be reduced. Therefore, the user experience can be improved.

A fourth aspect of the present application provides a vehicle. The vehicle comprises a stereoscopic display device as described in the first aspect, any one of the alternatives of the first aspect, the second aspect or any one of the alternatives of the second aspect, or a stereoscopic display system as described in the third aspect. The stereoscopic display device or stereoscopic display system is mounted on a vehicle.

Drawings

Fig. 1a is a schematic diagram of a first structure of a stereoscopic display device according to an embodiment of the present application;

fig. 1b is a schematic diagram of a second structure of the stereoscopic display device according to the embodiment of the present application;

fig. 1c is a schematic diagram of a third structure of a stereoscopic display device according to an embodiment of the present application;

fig. 2 is a schematic diagram of a fourth structure of the stereoscopic display device according to the embodiment of the present application;

fig. 3 is a schematic structural diagram of a backlight assembly according to an embodiment of the present application;

fig. 4 is a schematic diagram of a fifth structure of the stereoscopic display device according to the embodiment of the present application;

fig. 5 is a sixth schematic structural diagram of the stereoscopic display device according to the embodiment of the present application;

fig. 6 is a seventh schematic structural diagram of a stereoscopic display device according to an embodiment of the present application;

fig. 7 is an eighth schematic structural diagram of the stereoscopic display device according to the embodiment of the present application;

Fig. 8 is a schematic structural diagram of a stereoscopic display system according to an embodiment of the present disclosure;

fig. 9 is a schematic circuit diagram of a stereoscopic display device according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a stereoscopic display system according to an embodiment of the present application mounted on a vehicle;

fig. 11 is a schematic diagram of one possible functional framework of a vehicle provided in an embodiment of the present application.

Detailed Description

The application provides a stereoscopic display device, a stereoscopic display system and a vehicle, wherein the same light source device can be shared by adding optical elements, so that the cost of the stereoscopic display device is reduced. It is to be understood that the use of "first," "second," etc. herein is for descriptive purposes only and is not to be construed as indicating or implying any relative importance or order. In addition, for simplicity and clarity, reference numbers and/or letters are repeated throughout the several figures of the embodiments of the present application. Repetition does not indicate a tightly defined relationship between the various embodiments and/or configurations.

The stereoscopic display device in the present application may also be referred to as a 3D display device. The stereoscopic display device is applied to the display field. In the display field, stereoscopic visual enjoyment can be provided to a user through a stereoscopic display device. However, the stereoscopic display apparatus includes 2 light source devices, resulting in a higher cost of the stereoscopic display apparatus.

To this end, the present application provides a stereoscopic display device. Fig. 1a is a schematic diagram of a first structure of a stereoscopic display device according to an embodiment of the present application. As shown in fig. 1a, the stereoscopic display apparatus 100 includes a backlight assembly. The backlight assembly includes a light source device 101 and an optical element 102. The stereoscopic display apparatus 100 further comprises a spatial light modulator 103 or a diffusion screen 103. The light source device 101 may be a light emitting diode (light emitting diode) light source or a Laser Diode (LD) light source, or the like. The light source device 101 is configured to output an original light beam to the optical element 102. The optical element 102 may be a lens, a mirror, a prism, a fresnel mirror, or the like. The optical element 102 is used to obtain a first light beam from the original light beam at a first position. The first light beam is irradiated to the receiving surface 104.

In fig. 1a, the chief ray of the light source device 101 coincides with the X-axis. The optical axis of the optical element 102 coincides with the X-axis. Accordingly, the principal ray of the light source device 101 and the optical axis of the optical element 102 coincide. When the receiving surface 104 is perpendicular to the X-axis, the principal ray forms an angle α of 90 ° with the receiving surface 104. The stereoscopic display device 100 in the present application changes the angle of the principal ray of the original light beam by using the eccentricity of the principal ray of the light source device 101 and the optical axis position of the optical element 102 (the principal ray of the light source device 101 and the optical axis of the optical element 102 are offset up and down), so that the optical element 102 outputs the second light beam in different transmission directions.

Fig. 1b is a schematic diagram of a second structure of the stereoscopic display device according to the embodiment of the present application. As shown in fig. 1b, the optical element 102 is translated upwards on the basis of fig. 1 a. At this time, in fig. 1b, the principal ray of the light source device 101 coincides with the X-axis. The optical axis 105 of the optical element 102 is parallel to the X-axis. The optical axis 105 of the optical element 102 is shifted upward with respect to the principal ray of the light source device 101. Thus, the optical element 102 changes the angle of the chief ray of the original beam (i.e., changes the transmission direction of the original beam), resulting in the second beam. In fig. 1b, the angle of the chief ray of the second beam is shifted upwards. The upwardly offset angle causes the illuminated area of the beam on the receiving surface 104 to move upwardly. The chief ray of the second beam has an angle beta with the receiving surface 104 of more than 90 deg..

Fig. 1c is a schematic diagram of a third structure of the stereoscopic display device according to the embodiment of the present application. As shown in fig. 1c, the optical element 102 is translated downward on the basis of fig. 1 a. At this time, in fig. 1c, the principal ray of the light source device 101 coincides with the X-axis. The optical axis 105 of the optical element 102 is parallel to the X-axis. The optical axis 105 of the optical element 102 is shifted downward with respect to the principal ray of the light source device 101. Thus, the optical element 102 changes the angle of the chief ray of the original beam (i.e., changes the transmission direction of the original beam), resulting in the second beam. In fig. 1c, the angle of the chief ray of the second beam is shifted downwards. The downward offset angle causes the illuminated area of the beam on the receiving surface 104 to move downward. The chief ray of the second beam has an angle beta with the receiving surface 104 of less than 90 deg..

The position of the optical element 102 in fig. 1a is referred to as a first position, and the position of the optical element 102 in fig. 1b or fig. 1c is referred to as a second position. The time that the optical element 102 stays in the first position is referred to as a first time. The time that the optical element 102 stays in the second position is referred to as a second time. At a first time, the optical element 102 outputs a first light beam at a first location. At a second instant, the optical element 102 outputs a second light beam at a second location. The first light beam and the second light beam output from the optical element 102 are time-shared to be irradiated on the receiving surface 104. The first light beam and the second light beam have an overlapping region in the irradiation range of the receiving surface 104. The spatial light modulator 103 or the diffusion screen 103 may be disposed in the overlapping region.

The spatial light modulator 103 may be a liquid crystal display (liquid crystal display, LCD), liquid crystal on silicon (liquid crystal on silicon, LCOS), or digital micro-mirror device (DMD), etc. At this time, the first light beam and the second light beam are light beams that do not carry image information. The spatial light modulator 103 is configured to modulate the first light beam and the second light beam according to different image information, so as to obtain two paths of imaging light. For example, at a first moment, the spatial light modulator 103 modulates the first light beam according to the first image information, resulting in a first path of imaging light. At a second moment, the spatial light modulator 103 modulates the second light beam according to the second image information, resulting in a second path of imaging light. The two imaging light paths carry different image information. When the two paths of imaging light are respectively irradiated to the left eye and the right eye of the user, stereoscopic visual enjoyment can be provided for the user.

When the stereoscopic display apparatus includes the diffusion screen 103, the first light beam and the second light beam are light beams carrying image information. At this time, the light source device 101 may be a combination of a light source and a spatial light modulator. The diffusion screen 103 is used for diffusing the first light beam and the second light beam carrying different image information to obtain two paths of imaging light. Because the first and second beams carry different image information, the two imaging light paths also carry different image information.

In the embodiment of the present application, by changing the position of the optical element 102, it is possible to output the first light beam and the second light beam in different transmission directions in the case of using one light source device 101. Therefore, the embodiments of the present application can reduce the number of light source devices 101 in the stereoscopic display apparatus, thereby reducing the cost of the stereoscopic display apparatus.

In the foregoing examples, the optical element 102 in fig. 1a is in the first position, and the optical element 102 in fig. 1b or fig. 1c is in the second position. In practice, the optical element 102 may be referred to as a first position and a second position in any of two different positions. For example, the optical element 102 is located at the first position in fig. 1 b. The optical element 102 is configured to change the transmission direction of the original light beam at the first position, so as to obtain a first light beam. The optical element 102 is located in the second position in fig. 1 c. The optical element 102 is configured to change the transmission direction of the original light beam at the second position, so as to obtain a second light beam.

As can be seen from the foregoing description of fig. 1a, 1b and 1c, by changing the position of the optical element 102, the irradiation range of the light beam on the receiving surface 104 is changed. At this time, since the irradiation ranges of the first light beam and the second light beam on the receiving surface 104 do not overlap, there is a waste of energy of a part of the light beams. For this reason, in the embodiment of the present application, the irradiation ranges of the first light beam and the second light beam on the receiving surface 104 may also be overlapped as much as possible by moving the light source device 101.

Fig. 2 is a schematic diagram of a fourth structure of the stereoscopic display device according to the embodiment of the present application. As shown in fig. 2, the stereoscopic display device 100 includes a backlight assembly 201. The stereoscopic display apparatus 100 further comprises a spatial light modulator 103 or a diffusion screen 103 (not shown in the figure). The spatial light modulator 103 or the diffusion screen 103 is provided on the receiving surface 104. The backlight assembly 201 includes a light source device 101 and an optical element 102. The backlight assembly 201 can be moved between the position a and the position B by the moving mechanism.

In position a, the light source device 101 is in the third position and the optical element 102 is in the first position. At a first instant, the light source device 101 is configured to output a first original light beam. The optical element 102 is configured to obtain a first light beam from a first original light beam. At position a, the optical axis of the optical element 102 is shifted downward with respect to the principal ray of the light source device 101. Accordingly, the angle of the chief ray of the first beam (indicated by the broken line connected to the light source device 101 at position a) is shifted downward. The optical element 102 is configured to change a transmission direction of the first original light beam to obtain a first light beam.

In position B, the light source device 101 is in the fourth position and the optical element 102 is in the second position. At a second instant, the light source device 101 is configured to output a second original light beam. The optical element 102 is configured to obtain a second light beam from the second original light beam. At the position B, the optical axis of the optical element 102 is shifted upward with respect to the principal ray of the light source device 101. Accordingly, the angle of the chief ray of the second beam (indicated by the broken line connected to the light source device 301 at position B) is shifted upward. The optical element 102 is configured to change the transmission direction of the second original light beam, so as to obtain a second light beam.

For a description of the spatial light modulator 103 or the diffusion screen 103, reference may be made to the description in fig. 1a, 1b or 1c described previously. When the principal ray of the first light beam and the principal ray of the second light beam overlap on the receiving surface 104, the irradiation ranges of the first light beam and the second light beam on the receiving surface 104 overlap. The size of the irradiation range of the first light beam and the second light beam on the receiving surface 104 may be as large as possible as the size of the spatial light modulator 103 or the diffusion screen 103. Therefore, the embodiment of the application improves the utilization rate of the light beam.

In fig. 2, at position a, the optical element 102 needs to shift the angle of the chief ray downward. At position B, the angle of the chief ray is shifted upward. Therefore, the relative positions of the third position and the first position are different from the relative positions of the fourth position and the second position, i.e., the amounts of offset of the third position and the first position are different from the amounts of offset of the fourth position and the second position.

As can be seen from the foregoing description of fig. 2, the embodiment of the present application requires moving the position of the backlight assembly. In an embodiment of the present application, the stereoscopic display device may further include a moving mechanism. The movement mechanism is used to move the optical element 102 and/or the light source device 101. In order to reduce the complexity of the moving mechanism and reduce the need for moving space, the moving mechanism may move the optical element 102 and/or the light source device 101 by straight lines.

Fig. 3 is a schematic structural diagram of a backlight assembly according to an embodiment of the present application. As shown in fig. 3, the backlight assembly 201 includes a light source device 101 and an optical element 102. The moving mechanism is used to move the backlight assembly 201 from the position a to the position B.

The light source device 101 is configured to move from the third position to the fourth position through the first path. The fourth position and the third position lie in a first plane 301. The first path is parallel to the first straight line. The first line lies on a first plane 301. The length of the first path is d1.

The optical element 102 moves from the first position to the second position through the second path. The first location and the second location lie in a second plane 302. The second path is parallel to the second straight line. The second line lies on a second plane 302. The second path has a length d2. In order to overlap the irradiation ranges of the first light beam and the second light beam on the receiving surface 104 as much as possible, d2 is smaller than d1. The second plane 302 may be parallel to the first plane 301. The second path may be parallel to the first path. The second plane 302 and the first plane 301 may be perpendicular to the principal ray of the light source device 301.

In the foregoing fig. 2 and 3, the movement of the backlight assembly 201 from the position a to the position B is described. It should be appreciated that in practical applications, the backlight assembly 201 needs to be frequently moved between the positions a and B in order to provide stable stereoscopic viewing enjoyment. Accordingly, regarding the description of the movement of the backlight assembly 201 from the position B to the position a, reference may be made to the related description in fig. 2 or 3. If the backlight assembly 201 outputs a light beam during movement, crosstalk may be caused, thereby affecting the user experience. For this reason, the backlight assembly 201 may not output a light beam during the movement.

In the previous descriptions of fig. 1 a-1 c, 2 and 3, the optical element 102 is used to change the transmission direction of the original beam, so as to output a first beam and a second beam with different transmission directions. In practical applications, the optical element 102 may also be used to change the divergence angle of the original beam, resulting in the first beam and/or the second beam. For example, in fig. 2, at position a, the optical element 102 is used to increase the divergence angle of the first original beam, resulting in a first beam. In position B, the optical element 102 is used to increase the divergence angle of the second original beam, resulting in a second beam. By increasing the spread angle of the original light beam, the distance between the light source device 101 and the spatial light modulator 103 or the diffusion screen 103 can be reduced. Therefore, the embodiment of the application can reduce the size of the stereoscopic display device, thereby improving the user experience.

In the foregoing description of fig. 2 and 3, the backlight assembly is used to move between the positions a and B. In practical applications, the backlight assembly may be used to move between M positions. The backlight assembly is used to output the M light beams at different angles. The M light beams include a first light beam and a second light beam. The M positions include a first position and a second position. The M positions are in one-to-one correspondence with the M light beams. M is an integer greater than 1. The following description will take M equal to 3 as an example.

Fig. 4 is a schematic diagram of a fifth structure of the stereoscopic display device according to the embodiment of the present application. As shown in fig. 4, the stereoscopic display device 100 includes a backlight assembly 201. The stereoscopic display apparatus 100 further comprises a spatial light modulator 103 or a diffusion screen 103 (not shown in the figure). The spatial light modulator 103 or the diffusion screen 103 is provided on the receiving surface 104. The backlight assembly 201 includes a light source device 101 and an optical element 102. The backlight assembly 201 can be moved among the position a, the position B, and the position C by the moving mechanism.

With respect to the description at position a and position B, reference may be made to the related description in fig. 2 described previously. In position C, the light source device 101 is located at the fifth position, and the optical element 102 is located at the sixth position. At a third instant, the light source device 101 is configured to output a third primary light beam. The optical element 102 is configured to obtain a third light beam according to the third original light beam. The spatial light modulator 103 is configured to modulate the first light beam, the second light beam, and the third light beam to obtain three imaging lights. The diffuser screen 103 is used for the first light beam. And diffusing the second light beam and the third light beam to obtain three imaging lights. The three imaging lights can be irradiated to different viewpoints on the imaging plane. In fig. 4, three imaging lights are respectively irradiated to viewpoint 1, viewpoint 2, and viewpoint 3.

In the foregoing fig. 4, the description is given taking M equal to 3 as an example. In practical applications, M may also be other values, for example, M equals 4, 6 or 8. By moving between M positions, more viewing positions can be provided. For example, in fig. 4, M positions correspond to M viewpoints. Position B corresponds to viewpoint 1. Position a corresponds to viewpoint 3. Position C corresponds to viewpoint 2. Each of the M viewpoints may correspond to one eye of the user. Any two of the M views correspond to one viewing position. For example, viewpoint 1 corresponds to the left eye of the user and viewpoint 2 corresponds to the right eye of the user. Viewpoint 1 and viewpoint 2 correspond to viewing position 1. For another example, viewpoint 2 corresponds to the left eye of the user and viewpoint 3 corresponds to the right eye of the user. Viewpoint 2 and viewpoint 3 correspond to viewing position 2.

In practical applications, only M views may be viewed by the user from among the N views. By moving only between M positions, the image frame rate of a single user can be increased. Accordingly, in order to improve the user experience, the backlight assembly may be moved between M positions among the N positions. N positions versus N views. At this time, the stereoscopic display device 100 may further include a human eye tracking module and a processor. The eye tracking module is used for acquiring coordinates of M viewpoints, for example, M viewpoints. The M viewpoints and the M positions are in one-to-one correspondence. The processor is used for controlling the backlight assembly to move between M positions in the N positions according to the M viewpoints. In the following, N is equal to 3 and m is equal to 2.

Fig. 5 is a sixth schematic structural diagram of the stereoscopic display device according to the embodiment of the present application. As shown in fig. 5, the stereoscopic display device 100 includes a backlight assembly 201, an eye tracking module 502, and a processor 501. The stereoscopic display apparatus 100 further comprises a spatial light modulator 103 or a diffusion screen 103 (not shown in the figure). The spatial light modulator 103 or the diffusion screen 103 is provided on the receiving surface 104. The eye tracking module 502 is configured to obtain M viewpoints. The M views include view 2 and view 3. Viewpoint 2 corresponds to position C. Viewpoint 3 corresponds to position a. The processor 501 is used to control the backlight assembly 201 to move between M positions of the N positions according to the M viewpoints. The N positions include position A, position B and position C, respectively. The M positions include position A and position C.

It should be understood that fig. 5 is only one example of M locations provided in embodiments of the present application. In practical applications, the processor 501 may control the backlight assembly 201 to move between corresponding M positions according to M viewpoints. For example, the M views include view 1 and view 2. The M positions include position B and position C. For another example, the M views include view 1 and view 3. The M positions include position B and position A.

In practical application, when the N value is too large, the image frame rate of a single user is reduced, thereby affecting the user experience. Therefore, the image frame rate of a single user can be improved by limiting the value of N, so that the user experience is improved. For example, N may range from 2 to 10. N may take on a value of 2 or 10.

When the backlight assembly 201 moves between M positions among the N positions, whether the M positions include the target position may be determined by the following manner. If the backlight assembly stays at the target position and the backlight assembly transmits a light beam to the spatial light modulator 103 or the diffusion screen 103 at the target position, the M positions include the target position.

For example, in fig. 5, the backlight assembly 201 moves between the position a and the position C. The backlight assembly 201 stays at position a for 1 millisecond. During stay, the backlight assembly 201 outputs a first light beam. After staying for 1 millisecond, the backlight assembly 201 takes 1 millisecond to move from the position a to the position C. The backlight assembly 201 stays at position C for 1 millisecond. During the stay, the backlight assembly 201 outputs the second light beam. After staying for 1 millisecond, the backlight assembly 201 takes 1 millisecond to move from the position C to the position a. The above process is repeated. In the above process, the backlight assembly 201 stays at the positions a and C, and outputs the light beam. Thus, the M positions include position a and position C. In the above process, the backlight assembly 201 may not stay at the position B. Thus, the M positions do not include position B.

For another example, the backlight assembly 201 moves between position a and position B. The backlight assembly 201 stays at position a for 1 millisecond. During stay, the backlight assembly 201 outputs a first light beam. After staying for 1 millisecond, the backlight assembly 201 takes 2 milliseconds to move from the position a to the position B. The backlight assembly 201 stays at position B for 1 millisecond. During the stay, the backlight assembly 201 outputs the second light beam. After staying for 1 millisecond, the backlight assembly 201 takes 2 milliseconds to move from the position B to the position a. The above process is repeated. In the above process, the backlight assembly 201 stays at the position a and the position B, and outputs the light beam. Thus, the M positions include position a and position B. In the above process, the backlight assembly 201 may pass through the position C, but the backlight assembly 201 may not stay at the position C and may not output a light beam at the position C. Thus, the M positions do not include position C.

In practical applications, the distance between the user and the spatial light modulator 103 or the diffusion screen 103 may vary, thereby applying the user's viewing experience. For example, in fig. 5, the distance between the viewpoint 2 of the left eye of the user and the diffusion screen 103 is T1. At this time, the spot size of the imaging light obtained from the second light beam on the imaging plane where the viewpoint 2 is located is adapted to the size of the left eye. If the user approaches the diffusion screen 103, the spot irradiated on the left eye becomes large. If the light spots cover the left eye and the right eye of the user at the same time, crosstalk can be generated, and the stereoscopic vision experience of the user is affected.

To this end, the optical element 102 may be a variable focus device. The eye tracking module 502 may be used to obtain the distance between the viewpoint and the spatial light modulator 103 or the diffusion screen 103. The processor 501 is configured to adjust the focal length of the optical element 102 according to the distance. For example, the processor 501 reduces the focal length of the optical element 102 when the target viewpoint approaches the spatial light modulator 103 or the diffusion screen 103. When the target viewpoint is far from the spatial light modulator 103 or the diffusion screen 103, the processor 501 increases the focal length of the optical element 102.

From the foregoing description, when the N value is too large, the image frame rate of the individual user is reduced, thereby affecting the user experience. Accordingly, in order to provide more viewing positions, the stereoscopic display apparatus 100 may include K backlight assemblies to increase an image frame rate of a single user. Each of the K backlight assemblies includes one light source device and one optical element. K is an integer greater than 1. The K light source devices and the K optical elements are in one-to-one correspondence. The K backlight assemblies are used to output 2 x K light beams. The output angles of the 2 x K beams are different. The 2 x K beam includes a first beam and a second beam. The stereoscopic display apparatus 100 further comprises a spatial light modulator 103 or a diffusion screen 103. The spatial light modulator 103 is configured to modulate the 2×k beams to obtain 2×k imaging light. The diffusion screen 103 is used for diffusing the 2×k beams to obtain 2×k imaging light. Regarding the description of any one of the backlight assemblies, reference may be made to the related description in the foregoing fig. 1a to 5. The following description will take K equal to 3 as an example.

Fig. 6 is a seventh schematic structural diagram of a stereoscopic display device according to an embodiment of the present application. As shown in fig. 6, the stereoscopic display device 100 includes 3 backlight assemblies. The 3 backlight assemblies include a backlight assembly 201, a backlight assembly 601, and a backlight assembly 602. The backlight assembly 201 is used to move between position a and position B. The backlight assembly 201 time-divisionally outputs the first light beam and the second light beam. The backlight assembly 601 is used to move between position C and position D. The backlight assembly 602 is used to move between position E and position F. Regarding the description of the backlight assembly 601 and the backlight assembly 602, reference may be made to the description of the backlight assembly 201. The 3 backlight assemblies are used to output 6 light beams.

The stereoscopic display apparatus 100 further comprises a spatial light modulator 103 or a diffusion screen 103 (not shown in the figure). The spatial light modulator 103 or the diffusion screen 103 is provided on the receiving surface 104. The spatial light modulator 103 is configured to modulate 6 beams to obtain 6 imaging lights. The diffusion screen 103 is used for diffusing the 6 light beams to obtain 6 paths of imaging light. The 6 imaging lights are respectively irradiated to the viewpoints 1 to 6. The 6 paths of imaging light correspond to the viewpoints 1 to 6 one by one. The viewpoints 1 to 6 correspond to the positions A to F one by one. In fig. 6, viewpoint 1 corresponds to position F. Viewpoint 2 corresponds to position E. Viewpoint 3 corresponds to position D. Viewpoint 4 corresponds to position C. Viewpoint 5 corresponds to position B. Viewpoint 6 corresponds to position a.

It should be understood that when the stereoscopic display apparatus 100 includes K backlight assemblies, one backlight assembly may not correspond to one viewing position. For example, in fig. 6, viewpoint 2 and viewpoint 3 are combined into one viewing position. Viewpoint 4 and viewpoint 5 are combined into one viewing position. At this time, the backlight assembly 201 may stay at the position B all the time. The backlight assembly 602 may stay at the position E at all times. The backlight assembly 601 moves between the position C and the position D.

It should be understood that when the stereoscopic display apparatus 100 includes K backlight assemblies, two paths of imaging light corresponding to one backlight assembly may carry the same image information. For example, in fig. 6, viewpoint 2 and viewpoint 3 are combined into one viewing position. Viewpoint 4 and viewpoint 5 are combined into one viewing position. The backlight assembly 601 moves between the position C and the position D. At this time, two imaging lights formed by two light beams output from the backlight assembly 601 may carry the same image information. The imaging light corresponding to the backlight assembly 201 and the imaging light corresponding to the backlight assembly 601 carry different image information. The imaging light corresponding to the backlight assembly 602 and the imaging light corresponding to the backlight assembly 601 carry different image information. The eyes of the user at any viewing position can still receive imaging light carrying different image information, thereby obtaining stereoscopic visual enjoyment.

As can be seen from the foregoing description, the stereoscopic display device 100 may move the backlight assembly by a moving mechanism. When the stereoscopic display device 100 includes K backlight assemblies, the moving mechanism is used to move the K backlight assemblies. To reduce the complexity of the structure of the moving mechanism, the moving mechanism may move K backlight assemblies in the same direction. At this time, each of the K backlight assemblies has the same moving direction during the moving. For example, in fig. 6, at a certain time, the backlight assembly 201 moves from the position a to the position B. The backlight assembly 601 moves from position C to position D. The backlight assembly 602 moves from position E to position F.

In the previous examples of fig. 1a to 6, the optical element 102 is used to obtain the first light beam by transmitting the original light beam. From the foregoing description, the optical element 102 may also be a mirror. Thus, the optical element 102 may also be used to obtain the first light beam by reflecting the original light beam. As for the description of the optical element 102 obtaining the first light beam by reflection, reference may be made to the previous description of fig. 1a to 6.

In the foregoing fig. 2, the stereoscopic display apparatus 100 reduces the number of light source devices 101 by moving the backlight assembly 201. In practical applications, the backlight assembly in the stereoscopic display device may also be fixedly disposed. Fig. 7 is an eighth schematic structural diagram of the stereoscopic display device according to the embodiment of the present application. As shown in fig. 7, the stereoscopic display device 700 includes a backlight assembly 701. The backlight assembly 701 includes a first light source device 702, a first optical element 703, a second light source device 704, and a second optical element 705. The first light source device 702 and the second light source device 704 are arranged in parallel. The parallel arrangement means that the light emitting surfaces of the first light source device 702 and the second light source device 704 are on the same plane, and the light beam output directions of the first light source device 702 and the second light source device 704 are the same. The plane is perpendicular to the output direction. The first light source device 702 and the second light source device 704 are configured to output a first original light beam and a second original light beam in a time-sharing manner. For example, at a first moment, the first light source device 702 is configured to output a first original light beam to the first optical element 703. At a second instant in time, the second light source device 704 is configured to output a second original light beam to the second optical element 705. The first optical element 703 is used for obtaining a first light beam from a first original light beam. The first optical element 703 is not movable relative to the first light source device 702. Regarding the description of the first light source device 702 and the first optical element 703, reference may be made to the foregoing description of the backlight assembly of fig. 1a to 6. The second optical element 705 is configured to change a transmission direction of the second original light beam, so as to obtain a second light beam. The first light beam and the second light beam are irradiated to the receiving surface 104. For descriptions of the second light source device 704 and the second optical element 705, reference may be made to descriptions of the first light source device 702 and the first optical element 703.

The stereoscopic display apparatus 700 further comprises a spatial light modulator 103 or a diffusion screen 103. The spatial light modulator 103 or the diffusion screen 103 is provided on the receiving surface 104. The spatial light modulator 103 is configured to modulate the first light beam and the second light beam according to different image information, so as to obtain two paths of imaging light. The diffusion screen 103 is used for diffusing the first light beam and the second light beam carrying different image information to obtain two paths of imaging light. With regard to the description of the spatial light modulator 103 or the diffusion screen 103, reference may be made to the relevant description of fig. 1a to 6. The two imaging light beams are irradiated to different viewpoints. In fig. 7, imaging light corresponding to the first light beam is irradiated to the viewpoint 2. Imaging light corresponding to the second light beam is irradiated to the viewpoint 1.

The stereoscopic display device 700 has similarities to the stereoscopic display device 100 of fig. 1a to 6 described above. Accordingly, for the description of the stereoscopic display apparatus 700, reference may be made to the description of the stereoscopic display apparatus 100 described previously. For example, may include content of any one or more of the following.

1. The stereoscopic display apparatus 700 further comprises a processor 501. The processor 501 controls image information used by the spatial light modulator 103 according to an output light beam of the backlight assembly 701. For example, at a first time, the backlight assembly 701 outputs a first light beam, and the processor 501 controls the spatial light modulator 103 to modulate the first light beam using the first image information. At a second time, the backlight assembly 701 outputs a second light beam, and the processor 501 controls the spatial light modulator 103 to modulate the second light beam using the second image information.

2. The stereoscopic display apparatus includes K light source devices and K optical elements. K is an integer greater than 2. The K light source devices are arranged in parallel. The K light source devices include a first light source device and a second light source device. The K light source devices are used for outputting K original light beams. The K optical elements are used for changing the transmission directions of the K original light beams to obtain K light beams. The spatial light modulator is used for modulating K light beams to obtain K paths of imaging light. The diffusion screen is used for diffusing the K light beams to obtain K paths of imaging light. The 2 imaging light paths in the K imaging light paths are a group. The 2 imaging light paths in a set of imaging light carry different image information.

3. The first distance between the first optical element 703 and the second optical element 705 is d2. The second distance between the first light source device 702 and the second light source device 704 is d1. d2 is smaller than d1.

4. The first optical element 703 or the second optical element 705 also serves to change the divergence angle of the original light beam. For example, the first optical element 703 is further configured to increase the divergence angle of the first original light beam, resulting in the first light beam. The second optical element 705 is also used to increase the divergence angle of the second original beam, resulting in a second beam.

5. The first optical element 703 and/or the second optical element 705 are variable focus devices. The stereoscopic display device 700 may further include a human eye tracking module. The eye tracking module is used for acquiring the distance between the viewpoint and the stereoscopic display device 700. The processor 501 adjusts the focal length of the first optical element 703 and/or the second optical element 705 based on the distance.

6. The first optical element 703 is configured to change the transmission direction of the first original light beam by transmission, so as to obtain a first light beam. The second optical element 705 is configured to change the transmission direction of the second original light beam by transmission, resulting in a second light beam.

It should be understood that, as for the description of the stereoscopic display apparatus 100, reference may also be made to the description of the stereoscopic display apparatus 700 described above. For example, in practical applications, a plurality of light source devices distributed in an arc shape may occupy a larger space. In the embodiment of the present application, when the stereoscopic display apparatus 100 includes a plurality of light source devices, the plurality of light source devices may also be disposed in parallel. The parallel arrangement means that the light sources are on the same plane, and the light beam output directions of the light source devices are the same. The plane is perpendicular to the output direction.

In practice, the distance between the user and the spatial light modulator 103 or the diffusion screen 103 may be limited by spatial factors. In order to reduce the distance between the user and the spatial light modulator 103 or the diffusion screen 103, the imaging light output from the spatial light modulator 103 or the diffusion screen 103 may be magnified by a curved mirror. Fig. 8 is a schematic structural diagram of a stereoscopic display system according to an embodiment of the present application. As shown in fig. 8, the stereoscopic display device 800 includes a stereoscopic display device 802 and a curved mirror 801. The stereoscopic display device 802 is configured to output two paths of imaging light. As for the description of the stereoscopic display device 802, reference may be made to the description of the stereoscopic display device 100 or the stereoscopic display device 700 described previously. The curved mirror 801 is used for reflecting two paths of imaging light, and an included angle exists between the two paths of reflected imaging light. The focal length of curved mirror 801 is f. The spatial light modulator 103 or the diffuser 103 is spaced a distance d from the curved mirror 801.

Each point on the curved mirror 801 is a vertical distance from the spatial light modulator 103 or the diffuser 103. d may be the furthest vertical distance. Alternatively, d may be the linear distance of the center pixel or center point of the spatial light modulator 103 or diffusion screen 103 from the target point on the curved mirror 801. The center pixel is one or more pixels at the center position of the spatial light modulator 103 or the diffusion screen 103. The imaging light output from the center pixel irradiates the target point on the curved mirror 801. d is less than f. When d is smaller than f, the curved mirror 801 can magnify the virtual image. Therefore, when the distance between the user and the stereoscopic display device 800 is relatively short, the user can see the enlarged virtual image, thereby improving the user experience.

Referring to fig. 9, fig. 9 is a schematic circuit diagram of a stereoscopic display device according to an embodiment of the present application.

As shown in fig. 9, the circuits in the stereoscopic display device mainly include a processor 1001, an internal memory 1002, an external memory interface 1003, an audio module 1004, a video module 1005, a power module 1006, a wireless communication module 1007, an i/O interface 1008, a video interface 1009, a processor local area network (Controller Area Network, CAN) transceiver 1010, a display circuit 1028, a display panel 1029, and the like. The processor 1001 and its peripheral elements, such as the internal memory 1002, the can transceiver 1010, the audio module 1004, the video module 1005, the power module 1006, the wireless communication module 1007, the i/O interface 1008, the video interface 1009, and the display circuit 1028, may be connected by a bus. The processor 1001 may be referred to as a front-end processor.

In addition, the circuit diagrams illustrated in the embodiments of the present application do not constitute a specific limitation on the stereoscopic display device. In other embodiments of the present application, the stereoscopic display device may include more or less components than illustrated, or certain components may be combined, or certain components may be split, or different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 1001 includes one or more processing units, for example: the processor 1001 may include an application processor (Application Processor, AP), a modem processor, a graphics processor (Graphics Processing Unit, GPU), an image signal processor (Image Signal Processor, ISP), a video codec, a digital signal processor (Digital Signal Processor, DSP), a baseband processor, and/or a Neural network processor (Neural-Network Processing Unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.

A memory may also be provided in the processor 1001 for storing instructions and data. For example, an operating system of the stereoscopic display device, an AR Creator software package, and the like are stored. In some embodiments, the memory in the processor 1001 is a cache memory. The memory may hold instructions or data that the processor 1001 has just used or recycled. If the processor 1001 needs to reuse the instruction or data, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 1001 is reduced, thus improving the efficiency of the system.

In addition, if the stereoscopic display device in the present embodiment is mounted on a vehicle, the functions of the processor 1001 may be implemented by a domain processor on the vehicle.

In some embodiments, the stereoscopic display device may further include a plurality of Input/Output (I/O) interfaces 1008 connected to the processor 1001. The interface 1008 may include, but is not limited to, an integrated circuit (Inter-Integrated Circuit, I2C) interface, an integrated circuit built-in audio (Inter-Integrated Circuit Sound, I2S) interface, a pulse code modulation (Pulse Code Modulation, PCM) interface, a universal asynchronous receiver Transmitter (Universal Asynchronous Receiver/Transmitter, UART) interface, a mobile industry processor interface (Mobile Industry Processor Interface, MIPI), a General-Purpose Input/Output (GPIO) interface, a subscriber identity module (Subscriber Identity Module, SIM) interface, and/or a universal serial bus (Universal Serial Bus, USB) interface, among others. The I/O interface 1008 may be connected to a mouse, a touch screen, a keyboard, a camera, a speaker/horn, a microphone, or may be connected to physical keys (e.g., a volume key, a brightness adjustment key, an on/off key, etc.) on the stereoscopic display device.

The internal memory 1002 may be used to store computer-executable program code that includes instructions. The internal memory 1002 may include a stored program area and a stored data area. The storage program area may store an application program (such as a call function, a time setting function, an AR function, etc.) required for at least one function of the operating system, etc. The storage data area may store data (such as a phonebook, world time, etc.) created during use of the stereoscopic display device, etc. In addition, the internal memory 1002 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash memory (Universal Flash Storage, UFS), and the like. The processor 1001 performs various functional applications of the stereoscopic display device and data processing by executing instructions stored in the internal memory 1002 and/or instructions stored in a memory provided in the processor 1001.

The external memory interface 1003 may be used to connect to an external memory (for example, micro SD card), and the external memory may store data or program instructions as needed, and the processor 1001 may perform operations such as reading and writing on these data or program execution through the external memory interface 1003.

The audio module 1004 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module 1004 may also be used to encode and decode audio signals, such as for playback or recording. In some embodiments, the audio module 1004 may be provided in the processor 1001, or a part of functional modules of the audio module 1004 may be provided in the processor 1001. The stereoscopic display device may implement audio functions through an audio module 1004, an application processor, and the like.

The video interface 1009 may receive externally input audio and video, which may specifically be a high-definition multimedia interface (High Definition Multimedia Interface, HDMI), a digital video interface (Digital Visual Interface, DVI), a video graphics array (Video Graphics Array, VGA), a Display Port (DP), a low voltage differential signaling (Low Voltage Differential Signaling, LVDS) interface, and the like, and the video interface 1009 may further output video. For example, the stereoscopic display device receives video data transmitted from the navigation system or video data transmitted from the domain processor through the video interface.

The video module 1005 may decode the video input by the video interface 1009, for example, h.264 decoding. The video module can also encode the video collected by the stereoscopic display device, for example, H.264 encodes the video collected by an external camera. The processor 1001 may decode the video input from the video interface 1009 and output the decoded image signal to the display circuit.

Further, the stereoscopic display device further includes a CAN transceiver 1010, and the CAN transceiver 1010 may be connected to a CAN BUS (CAN BUS) of the automobile. The stereoscopic display device CAN communicate with a car entertainment system (music, radio, video module), a car status system, etc. through the CAN bus. For example, the user may turn on the in-vehicle music play function by operating the stereoscopic display device. The vehicle state system may transmit vehicle state information (doors, seatbelts, etc.) to the stereoscopic display device for display.

The display circuit 1028 and the display panel 1029 realize a function of displaying an image together. The display circuit 1028 receives the image signal output from the processor 1001, processes the image signal, and inputs the processed image signal to the display panel 1029 for imaging. The display circuit 1028 can also control an image displayed on the display panel 1029. For example, parameters such as display brightness or contrast are controlled. The display circuit 1028 may include a driving circuit, an image control circuit, and the like. Wherein the display circuit 1028 and the display panel 1029 may be located in the pixel assembly 502.

The display panel 1029 is used to modulate the light beam input from the light source according to the input image signal, thereby generating a visual image. The display panel 1029 may be a liquid crystal on silicon panel, a liquid crystal display panel, or a digital micromirror device.

In this embodiment, the video interface 1009 may receive input video data (or referred to as a video source), the video module 1005 decodes and/or digitizes the input video data and outputs an image signal to the display circuit 1028, and the display circuit 1028 drives the display panel 1029 to image a light beam emitted by the light source according to the input image signal, so as to generate a visual image (emit imaging light).

The power module 1006 is configured to provide power to the processor 1001 and the light source based on input power (e.g., direct current), and the power module 1006 may include a rechargeable battery that may provide power to the processor 1001 and the light source. Light emitted from the light source may be transmitted to the display panel 1029 for imaging, thereby forming an image light signal (imaging light).

In addition, the power module 1006 may be connected to a power module (e.g., a power battery) of the vehicle, and the power module 1006 of the stereoscopic display device is powered by the power module of the vehicle.

The wireless communication module 1007 may enable the stereoscopic display device to wirelessly communicate with the outside world, which may provide solutions for wireless communication such as wireless local area network (Wireless Local Area Networks, WLAN) (e.g., wireless fidelity (Wireless Fidelity, wi-Fi) network), bluetooth (BT), global navigation satellite system (Global Navigation Satellite System, GNSS), frequency modulation (Frequency Modulation, FM), near field wireless communication technology (Near Field Communication, NFC), infrared technology (IR), etc. The wireless communication module 1007 may be one or more devices that integrate at least one communication processing module. The wireless communication module 1007 receives electromagnetic waves via an antenna, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the processor 1001. The wireless communication module 1007 may also receive signals to be transmitted from the processor 1001, frequency modulate them, amplify them, and convert them to electromagnetic waves for radiation via an antenna.

In addition, the video data decoded by the video module 1005 may be received wirelessly by the wireless communication module 1007 or read from the internal memory 1002 or the external memory, for example, the stereoscopic display device may receive video data from a terminal device or an in-vehicle entertainment system through a wireless lan in the vehicle, and the stereoscopic display device may also read audio/video data stored in the internal memory 1002 or the external memory, in addition to the video data input through the video interface 1009.

The embodiment of the application also provides a vehicle, and the vehicle is provided with any one of the three-dimensional display devices. The two paths of imaging light carry image information of different parallaxes. The two paths of imaging light are reflected to the windshield through the reflecting mirror, and the windshield further reflects the two paths of imaging light to form a virtual image. The virtual image is located on one side of the windshield and the driver or passenger is located on the other side of the windshield. The reflected two paths of imaging light are respectively irradiated to both eyes of the driver or the passenger. For example, the first imaging light irradiates the left eye of the passenger. The second imaging light irradiates the right eye of the passenger.

The embodiment of the application also provides a vehicle, and the vehicle is provided with the stereoscopic display system in the figure 10. Fig. 10 is a schematic diagram of a stereoscopic display system according to an embodiment of the present application installed in a vehicle. The windshield of the vehicle may act as a curved mirror in a stereoscopic display system. The stereoscopic display device 802 in the stereoscopic display system is located on the same side of the windshield. The stereoscopic display device 802 is configured to output two paths of imaging light. The two paths of imaging light carry image information of different parallaxes. The windshield is used to reflect the two paths of imaging light to form a virtual image. The virtual image is located on one side of the windshield and the driver or passenger is located on the other side of the windshield. The reflected two paths of imaging light are respectively irradiated to both eyes of the driver or the passenger. For example, the first imaging light irradiates the left eye of the passenger. The second imaging light irradiates the right eye of the passenger.

By way of example, the vehicle may be a car, truck, motorcycle, bus, boat, airplane, helicopter, mower, recreational vehicle, casino vehicle, construction equipment, electric car, golf cart, train, trolley, etc., and embodiments of the present application are not particularly limited. The stereoscopic display device can be installed on an Instrument Panel (IP) table of a vehicle, located at a secondary driving position or a primary driving position, and also can be installed on the back of a seat. When applied to a vehicle, the stereoscopic Display device may be referred to as Head Up Display (HUD), and may be used to Display navigation information, vehicle speed, electric quantity/oil quantity, and the like.

As shown in FIG. 11, various subsystems may be included in the functional framework of the vehicle, such as a control system 14, a sensor system 12, one or more peripheral devices 16 (one shown), a power supply 18, a computer system 20, and a display system 32, as shown. Alternatively, the vehicle may also include other functional systems, such as an engine system to power the vehicle, etc., as not limited herein.

The sensor system 12 may include a plurality of sensing devices that sense the measured information and convert the sensed information to an electrical signal or other desired form of information output according to a certain rule. As illustrated, these detection devices may include, without limitation, a global positioning system (global positioning system, GPS), a vehicle speed sensor, an inertial measurement unit (inertial measurement unit, IMU), a radar unit, a laser rangefinder, an imaging device, a wheel speed sensor, a steering sensor, a gear sensor, or other elements for automatic detection, and so forth.

The control system 14 may include several elements such as a steering unit, a braking unit, a lighting system, an autopilot system, a map navigation system, a network timing system, and an obstacle avoidance system as shown. Optionally, control system 14 may also include elements such as a throttle processor and an engine processor for controlling the speed of travel of the vehicle, as not limited in this application.

Peripheral device 16 may include several elements such as the communication system in the illustration, a touch screen, a user interface, a microphone, and a speaker, among others. Wherein the communication system is used for realizing network communication between the vehicle and other devices except the vehicle. In practical applications, the communication system may employ wireless communication technology or wired communication technology to enable network communication between the vehicle and other devices. The wired communication technology may refer to communication between the vehicle and other devices through a network cable or an optical fiber, etc.

The power source 18 represents a system that provides power or energy to the vehicle, which may include, but is not limited to, a rechargeable lithium battery or lead acid battery, or the like. In practical applications, one or more battery packs in the power supply are used to provide electrical energy or power for vehicle start-up, and the type and materials of the power supply are not limited in this application.

Several functions of the vehicle are performed by the control of the computer system 20. The computer system 20 may include one or more processors 2001 (shown as one processor) and memory 2002 (which may also be referred to as storage devices). In practical applications, the memory 2002 is also internal to the computer system 20, or external to the computer system 20, for example, as a cache in a vehicle, and the present application is not limited thereto. Wherein, the liquid crystal display device comprises a liquid crystal display device,

for a description of the processor 2001, reference may be made to the description of the processor 1001 previously described. The processor 2001 may include one or more general-purpose processors, e.g., a graphics processor (graphic processing unit, GPU). The processor 2001 may be used to execute related programs or instructions corresponding to the programs stored in the memory 2002 to implement the corresponding functions of the vehicle.

Memory 2002 may include volatile memory (RAM), for example; the memory may also include a non-volatile memory (ROM), flash memory (flash memory), or solid state disk (solid state drives, SSD); memory 2002 may also include combinations of the above types of memory. Memory 2002 may be used to store a set of program codes or instructions corresponding to the program codes so that processor 2001 invokes the program codes or instructions stored in memory 2002 to implement the corresponding functions of the vehicle. Including but not limited to some or all of the functions in the vehicle function frame schematic shown in fig. 11. In this application, the memory 2002 may store a set of program codes for vehicle control, which the processor 2001 invokes to control the safe driving of the vehicle, as to how the safe driving of the vehicle is achieved, as described in detail below.

Alternatively, the memory 2002 may store information such as road maps, driving routes, sensor data, and the like, in addition to program codes or instructions. The computer system 20 may implement the relevant functions of the vehicle in combination with other elements in the functional framework schematic of the vehicle, such as sensors in the sensor system, GPS, etc. For example, the computer system 20 may control the direction of travel or speed of travel of the vehicle, etc., based on data input from the sensor system 12, without limitation.

The display system 32 may include several elements, such as a processor, curved mirror, and the stereoscopic display device 100 described previously. The processor is configured to generate an image (e.g., an image including a vehicle state such as a vehicle speed, an amount of electricity/oil, etc., and an image of augmented reality AR content) according to a user instruction, and transmit the image content to the stereoscopic display device 100. The stereoscopic display apparatus 100 is configured to output two paths of imaging light carrying different image information. The windshield is a curved mirror. The windshield is used to reflect or transmit two paths of imaging light so that a virtual image corresponding to the image content is presented in front of the driver or passenger. It should be noted that the functions of some of the elements in the display system 32 may be implemented by other subsystems of the vehicle, for example, the processor may be an element in the control system 14.

Herein, fig. 11 illustrates a system including four subsystems, the sensor system 12, the control system 14, the computer system 20, and the display system 32 are only examples, and are not limiting. In practical applications, the vehicle may combine several elements in the vehicle according to different functions, thereby obtaining subsystems with corresponding different functions. In practice, the vehicle may include more or fewer systems or elements, and the present application is not limited thereto.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A stereoscopic display apparatus characterized by comprising a light source device and an optical element, wherein:

the light source device is used for outputting an original light beam to the optical element;

The optical element is a lens and is used for obtaining a first light beam at a first position according to the original light beam;

the optical element is used for changing the transmission direction of the original light beam at a second position to obtain a second light beam;

the stereoscopic display device further comprises a spatial light modulator or a diffusion screen, wherein:

the spatial light modulator is used for modulating the first light beam and the second light beam according to different image information and outputting two paths of imaging light;

the diffusion screen is used for diffusing the first light beam and the second light beam carrying different image information and outputting two paths of imaging light.

2. A stereoscopic display apparatus according to claim 1, wherein the light source device is fixed in position with respect to the spatial light modulator or the diffusion screen;

the first light beam and the second light beam output by the optical element have an overlapping area, and the spatial light modulator or the diffusion screen is positioned in the overlapping area.

3. The stereoscopic display apparatus according to claim 1, wherein the light source device for outputting the original light beam to the optical element comprises: the light source device is used for outputting a first original light beam at a third position and outputting a second original light beam at a fourth position;

The optical element for obtaining a first light beam from the original light beam at a first location comprises: the optical element is used for obtaining the first light beam according to the first original light beam at the first position;

the optical element is configured to change a transmission direction of the original light beam at a second position, and obtaining a second light beam includes: the optical element is used for changing the transmission direction of the second original light beam at the second position to obtain a second light beam;

wherein the offset of the third position and the first position is different from the offset of the fourth position and the second position.

4. A stereoscopic display apparatus according to claim 3, wherein the third position and the fourth position lie in a first plane, the light source device being adapted to move from the third position to the fourth position via a first path.

5. The stereoscopic display apparatus according to claim 4, wherein the first position and the second position lie in a second plane, the optical element being configured to move from the first position to the second position via a second path.

6. The stereoscopic display apparatus according to claim 5, wherein the first plane and the second plane are parallel, the first path and the second path are parallel, and the second path has a length smaller than that of the first path.

7. The stereoscopic display apparatus according to any one of claims 1 to 6, wherein,

the optical element is further configured to change a divergence angle of the original beam at the second location to obtain the second beam.

8. The stereoscopic display apparatus according to claim 7, wherein,

the optical element is further configured to change a divergence angle of the original beam at the second location, the obtaining the second beam comprising: the optical element is used for increasing the diffusion angle of the original light beam to obtain the second light beam.

9. A stereoscopic display apparatus according to any one of claims 1 to 8, wherein the optical element is a variable focus device.

10. The stereoscopic display apparatus according to any one of claims 1 to 9, wherein,

the optical element for outputting the first light beam and the second light beam includes: the optical element is used for moving between M positions and outputting M light beams at different angles, the M light beams comprise the first light beam and the second light beam, the M positions comprise the first position and the second position, the M positions and the M light beams are in one-to-one correspondence, and M is an integer greater than 1.

11. The stereoscopic display device of claim 10, further comprising a human eye tracking module;

the eye tracking module is used for acquiring M viewpoints, and the M viewpoints are in one-to-one correspondence with the M positions;

the optical element for moving between M positions includes: the optical element is for moving between the M positions of the N positions according to the M viewpoints.

12. The stereoscopic display device according to claim 11, wherein the value of N ranges from 2 to 10.

13. The stereoscopic display apparatus according to any one of claims 1 to 12, wherein,

the stereoscopic display apparatus includes a light source device and an optical element including: the stereoscopic display device comprises K light source devices and K optical elements, wherein K is an integer greater than 1, and the K light source devices and the K optical elements are in one-to-one correspondence;

the K optical elements are configured to output 2×k light beams, the output angles of the 2×k light beams are different, and the 2×k light beams include the first light beam and the second light beam;

the spatial light modulator is configured to modulate the first light beam and the second light beam, and obtaining two paths of imaging light includes: the spatial light modulator is used for modulating the 2 XK beams to obtain 2 XK imaging light;

The diffusion screen is used for diffusing the first light beam and the second light beam carrying different image information, and obtaining two paths of imaging light comprises the following steps: the diffusion screen is used for diffusing the 2 XK beams to obtain 2 XK imaging light.

14. The stereoscopic display apparatus according to claim 13, wherein each of the K optical elements has the same moving direction during the movement.

15. The stereoscopic display apparatus according to any one of claims 1 to 14, wherein,

the optical element is configured to change a transmission direction of the original light beam at a second position, and obtaining a second light beam includes: the optical element is used for changing the transmission direction of the original light beam through transmission at the second position to obtain the second light beam.

16. A stereoscopic display system comprising a curved mirror and a stereoscopic display device according to any one of the preceding claims 1 to 15;

the stereoscopic display device is used for outputting two paths of imaging light;

the curved mirror is used for reflecting and expanding the two paths of imaging light, an included angle exists between the two paths of reflected imaging light, the focal length of the curved mirror is f, the distance between the spatial light modulator or the diffusion screen and the curved mirror is d, and the d is smaller than the f.

17. A vehicle comprising the stereoscopic display device of any one of claims 1 to 15 or the stereoscopic display system of claim 16, said stereoscopic display device or said stereoscopic display system being mounted on said vehicle.