WO2023185293A1

WO2023185293A1 - Image generation apparatus, display device, and vehicle

Info

Publication number: WO2023185293A1
Application number: PCT/CN2023/076104
Authority: WO
Inventors: 彭海军
Original assignee: 华为技术有限公司
Priority date: 2022-04-01
Filing date: 2023-02-15
Publication date: 2023-10-05
Also published as: CN116931265A

Abstract

An image generation apparatus (200), a display device, and a vehicle, which apparatus is used for acquiring a plurality of paths of different imaging light by means of a highly integrated structure. The image generation apparatus (200) comprises: a light source (210), which is used for outputting a light beam to a first wave plate (220) and a first modulation area (231) of an image modulator (230); the first wave plate (220), which is located in a light path between the light source (210) and a second modulation area (232) of the image modulator (230); the image modulator (230), which comprises: the first modulation area (231), which is used for modulating a light beam input by the light source (210) and emitting first imaging light in a first direction, and the second modulation area (232), which is used for modulating a light beam transmitted from the first wave plate (220) and emitting second imaging light in a second direction, wherein the second imaging light is incident to a second analyzer (250) through the first wave plate (220); a first analyzer (240), which is used for transmitting light in the first imaging light in a first polarization direction; the second analyzer (250), which is used for transmitting light in the second imaging light in a second polarization direction; and an imaging lens (260), which is used for imaging the first imaging light and the second imaging light.

Description

Image generating device, display device and vehicle

This application claims the priority of the Chinese patent application submitted to the State Intellectual Property Office of China on April 1, 2022, with application number 202210339923.4 and the application title "an image generation device, display device and means of transportation", and its entire content has been approved This reference is incorporated into this application.

Technical field

Embodiments of the present application relate to the field of image display, and in particular, to an image generating device, a display device and a vehicle.

Background technique

In projection display technology, an image generating device projects imaging light onto a reflective device, and the reflective device reflects the imaging light to the human eye, thereby causing the imaging light to form a virtual image on the other side of the reflective device relative to the human eye.

With the development of projection display technology, new requirements such as multi-focal plane and three-dimensional (3D) display have emerged, which require the acquisition of multiple different imaging lights. In a common practice, multiple channels of different imaging lights are obtained through multiple image generating devices; or, multiple channels of different imaging lights are acquired through multiple light sources, multiple image modulators or multiple imaging lenses in one image generating device. imaging light.

However, these solutions require multiple image generation devices, multiple image modulators, or multiple imaging lenses, which have the disadvantages of high cost, large volume, and complex architecture.

Contents of the invention

Embodiments of the present application provide an image generation device, a display device, and a vehicle.

In a first aspect, embodiments of the present application provide an image generating device, which includes a light source, an image modulator, a first analyzer, a second analyzer, and an imaging lens.

Wherein, the light source is used to output the light beam to the first modulation area and the second modulation area of the image modulator.

The first modulation area of the image modulator is used to modulate the light beam input by the light source according to the first image data, and emit the first imaging light to the first analyzer. The second modulation area of the image modulator is used to modulate the light beam input from the light source according to the second image data, and emit the second imaging light to the second analyzer.

The first analyzer is used to transmit light in the first polarization direction of the first imaging light. The second analyzer is used to transmit the light of the second polarization direction in the second imaging light. The second polarization direction and the first polarization direction may be the same or different.

The imaging lens is used to image the first imaging light passing through the first analyzer and the second imaging light passing through the second analyzer.

In the embodiment of the present application, the first imaging light and the second imaging light share a light source, an image modulator and an imaging lens, with a small number of components, a simple structure, and low cost. Moreover, before the first imaging light and the second imaging light are incident on the imaging lens, they pass through the first analyzer and the second analyzer respectively, which can prevent the light in the first imaging light that is not in the first polarization direction from passing through the first polarizer. The analyzer prevents light in a non-second polarization direction in the second imaging light from passing through the second analyzer, thereby improving the purity of the first imaging light and the second imaging light output from the imaging lens.

In an optional implementation, the image generating device further includes a first wave plate located on the optical path between the light source and the second modulation area of the image modulator. The light beam output by the light source passes through the first wave plate and then enters the second area of the image modulator. The second imaging light emerges from the second modulation area and then passes through the first wave plate and enters the second analyzer. Among them, the first wave of films can It is used to change the polarization direction of the light beam output by the light source, that is, to change the polarization direction of the light beam incident on the second modulation area of the image modulator. Furthermore, the polarization direction of the second imaging light output by the second modulation region of the image modulator can also be changed, so as to facilitate subsequent analysis of the second imaging light by the second analyzer.

In an optional implementation, the first wave plate is a quarter wave plate, and the first polarization direction and the second polarization direction are perpendicular to each other. Since the polarization directions of the light transmitted by the first analyzer and the second analyzer are perpendicular to each other, the first imaging light cannot be transmitted from the second analyzer, and the second imaging light cannot be transmitted from the first analyzer. This ensures that the two imaging lights are not confused with each other, thereby improving the purity of the first imaging light and the second imaging light output from the imaging lens.

In an optional implementation, the image generating device further includes a prism group. The prism group may be located on the optical path between the first analyzer, the second analyzer and the imaging lens. The first imaging light emitted from the first analyzer passes through the prism group and then emits to the In the imaging lens, the second imaging light emitted from the second analyzer passes through the prism group and then exits to the imaging lens. The prism group is used to make the first imaging light and the second imaging light exit parallel to each other after passing through the prism group. . In the embodiment of the present application, the first imaging light and the second imaging light exit the image modulator in different directions. The prism group makes the two imaging lights parallel to each other, thereby imaging through the same imaging lens, reducing the number of imaging lenses. Furthermore, by making the two imaging lights parallel, the structure of the image generation device can be made more compact, the volume of the entire image generation device can be reduced, and the image generation device can be miniaturized.

In an optional implementation, the prism group is used to adjust the optical path of the first imaging light from the first analyzer, and/or, used to adjust the light path of the second imaging light from the second analyzer. Procedure. After passing through the prism group, there is a first optical path difference between the first imaging light and the second imaging light. In the embodiment of the present application, the prism group is used to create an optical path difference between the first imaging light and the second imaging light, so that the two imaging lights are imaged on two different focal planes after reflection, achieving bifocal face display.

In an optional implementation, the image generating device further includes a second wave plate. The second wave plate is located between the first analyzer and the imaging lens and is used to change the polarization direction of the first imaging light. After the first imaging light passes through the second wave plate, the polarization direction is the same as the second polarization direction. Alternatively, the second wave plate is located between the second analyzer and the imaging lens, and is used to change the polarization direction of the second imaging light. After the second imaging light passes through the second wave plate, the polarization direction is the same as the first polarization direction. In this embodiment, the second wave plate is used to unify the polarization directions of the first imaging light and the second imaging light. The two imaging lights exit the imaging lens with the same polarization direction, and the same operation (such as ghost elimination, etc.) can be performed on the two imaging lights on the subsequent optical path, simplifying the optical path outside the image generation device.

In an optional implementation, the image generating device further includes a first optical device and a second optical device. The first optical device is used to divide the light beam output by the light source into a first light beam and a second light beam. The first optical device The light beam propagates to a first modulation region of the image modulator and the second light beam is reflected by the second optical device to a second modulation region of the image modulator.

In this embodiment, by adding a first optical device and a second optical device, the first modulation area of the image modulator can modulate the first light beam according to the first image data, generate the first imaging light, and pass the first The optical device transmits the first imaging light to the first analyzer; the second modulation area of the image modulator can modulate the second light beam according to the second image data, generate the second imaging light, and pass the second optical The device transmits the second imaging light to a second analyzer.

The first analyzer is used to transmit light in the first polarization direction of the first imaging light. The second analyzer is used to transmit the light of the first polarization direction in the second imaging light, or to transmit the light of the second polarization direction in the second imaging light. Wherein, the second polarization direction is different from the first polarization direction.

In an optional implementation, the first optical device is specifically configured to partially transmit and partially reflect the light beam emitted by the light source. The reflected light beam is the first light beam, and the transmitted light beam is the second light beam. Embodiments of the present application can perform intensity splitting through the first optical device to control the light intensity of the first light beam and the second light beam, thereby controlling the light intensity of the first imaging light and the second imaging light.

In an optional implementation, both the first optical device and the second optical device are polarizing beam splitters. Optionally, the first polarization direction of the first optical device and the second polarization direction of the second optical device are perpendicular to each other.

In a second aspect, embodiments of the present application provide an image generating device. The image generating device includes a light source, a first wave plate, an image modulator, a first analyzer, a second analyzer and an imaging lens. Wherein, the light source is used to output the light beam to the first wave plate and the first modulation area of the image modulator. The first wave plate is located in the optical path between the light source and the second modulation region of the image modulator. The image modulator includes a first modulation area and a second modulation area. The first modulation area is used to modulate the light beam input by the light source according to the first image data and emit the first imaging light in the first direction. The second modulation area is used to modulate the light beam transmitted from the first wave plate according to the second image data and emit the second imaging light in the second direction. After the second imaging light emerges from the second modulation region, it passes through the first wave plate and is incident on the second analyzer. The first analyzer is used to transmit light in the first polarization direction of the first imaging light. The second analyzer is used to transmit the light of the second polarization direction in the second imaging light. Wherein, the second polarization direction is different from the first polarization direction. The imaging lens is used to image the first imaging light passing through the first analyzer and the second imaging light passing through the second analyzer.

In the embodiment of the present application, the first imaging light and the second imaging light emit from the image modulator in different propagation directions. On the one hand, there can be an optical path difference between the two paths of imaging light from the image modulator to the imaging lens. , to achieve bifocal display, on the other hand, it can prevent the beam confusion at the edge of the two imaging lights, affecting the display effect of the two imaging lights. In this structure, two channels of imaging light share a light source, an image modulator and an imaging lens. The number of components is small, the structure is simple, and the cost is low. Furthermore, the image modulator is divided into partitions (dividing the first modulation area and the second modulation area) to output two channels of imaging light. Compared with the solution of periodically switching multiple channels of imaging light, there is no need for time matching and period control, which reduces equipment complexity and costs.

In an optional implementation, the first wave plate is a quarter wave plate, and the first polarization direction and the second polarization direction are perpendicular to each other.

In the embodiment of the present application, the polarization directions of the light transmitted by the first analyzer and the second analyzer are perpendicular to each other, the first imaging light cannot be transmitted from the second analyzer, and the second imaging light cannot be transmitted from the first analyzer. The transmission of the analyzer can ensure that the two imaging lights will not be confused with each other and affect the display effect.

In an optional implementation, the image generating device further includes a prism group. The prism group may be located on the optical path between the first analyzer, the second analyzer and the imaging lens. The first imaging light emitted from the first analyzer passes through the prism group and then emits to the In the imaging lens, the second imaging light emitted from the second analyzer passes through the prism group and then exits to the imaging lens. The prism group is used to make the first imaging light and the second imaging light exit parallel to each other after passing through the prism group. .

In the embodiment of the present application, the first imaging light and the second imaging light exit the image modulator in different directions. The prism group makes the two imaging lights parallel to each other, thereby imaging through the same imaging lens, reducing the number of imaging lenses. Furthermore, by making the two imaging lights parallel, the structure of the image generation device can be made more compact, the volume of the entire image generation device can be reduced, and the image generation device can be miniaturized.

In an optional implementation, the prism group includes a first prism and a second prism. The first prism is used to transmit the first imaging light from the first analyzer. The first prism is also used to reflect the second imaging light from the second analyzer, and the reflected second imaging light emerges from the first prism. The first imaging light and the second imaging light are parallel to each other after passing through the first prism. The second prism is used to transmit the first imaging light from the first prism and the second imaging light from the first prism.

In the embodiment of the present application, the optical path of the second imaging light is deflected through the first prism and the second prism, so that the two imaging lights are parallel to each other. The two prisms can be close to each other and have a compact structure, which can further reduce the volume of the entire image generating device and achieve miniaturization of the image generating device.

In an optional implementation, the first prism includes a first prism surface, a second prism surface and a third prism surface. The second imaging light from the second analyzer transmits the first prism surface, is totally reflected by the second prism surface, reaches the third prism surface, and is reflected by the third prism surface. After total reflection, it emerges from the second prism surface. The first imaging light from the first analyzer transmits the first prism surface and the second prism surface.

In an optional implementation, the second prism includes a fourth prism surface and a fifth prism surface, and the first imaging light from the first prism transmits the fourth prism surface and the fifth prism surface respectively to the In the imaging lens, the second imaging light from the first prism transmits the fourth prism surface and the fifth prism surface to the imaging lens respectively.

In an optional implementation, the prism group is used to adjust the optical path of the first imaging light from the first analyzer, and/or, used to adjust the light path of the second imaging light from the second analyzer. Procedure. After passing through the prism group, there is a first optical path difference between the first imaging light and the second imaging light.

In the embodiment of the present application, the optical path of the first imaging light represents the sum of the distances propagated in different media in the optical path of the first imaging light from the first modulation area to the imaging lens, which is converted into the corresponding distance propagated in vacuum. The optical path of the second imaging light represents the sum of the distances of the second imaging light propagating in different media in the optical path from the second modulation area to the imaging lens, which is converted into the corresponding distance propagating in vacuum. Through the prism group, there is an optical path difference between the first imaging light and the second imaging light, so that the two imaging lights are imaged on two different focal planes after reflection, thereby achieving bifocal plane display.

In an optional implementation, the image generating device further includes a reflecting mirror. The reflector is used to reflect the second imaging light, and the reflected second imaging light is parallel to the first imaging light. Alternatively, the reflector is used to reflect the first imaging light, and the reflected first imaging light is parallel to the second imaging light.

In the embodiment of the present application, the propagation direction of the first imaging light or the second imaging light is changed through a reflecting mirror, so that the second imaging light and the first imaging light are parallel to each other. Since the reflector only needs to change the propagation direction of one of the imaging lights once to realize the parallelization of the link imaging light, this structure has a simple optical path, a compact structure, and a small size, which can reduce the size of the image generation device and achieve image generation. Miniaturization of the device.

In an optional implementation, the reflecting mirror is used to adjust the optical path of the first imaging light from the first analyzer, or to adjust the optical path of the second imaging light from the second analyzer. After passing through the reflecting mirror, there is a first optical path difference between the first imaging light and the second imaging light.

In the embodiment of the present application, a reflector is used to create an optical path difference between the first imaging light and the second imaging light, so that the two imaging lights are imaged on two different focal planes after reflection and imaging, achieving dual Focal plane display.

In an optional implementation, the image modulator further includes an isolation area, and the isolation area is located between the first modulation area and the second modulation area.

In the embodiment of the present application, through the isolation area, on the one hand, the first imaging light and the second imaging light can be isolated to prevent the edge beams of the first imaging light and the second imaging light from being confused with each other and thus affecting the display effect. On the other hand, through the isolation area, it can be ensured that while neither the incident light nor the outgoing light (first imaging light) in the first modulation area passes through the first wave plate, the incident light and outgoing light (second imaging light) in the second modulation area can light) passes through the second wave plate (for details, please refer to the description of the embodiment shown in Figure 11).

In an optional implementation, the image generating device further includes a second wave plate. The second wave plate is located between the first analyzer and the imaging lens and is used to change the polarization direction of the first imaging light. After the first imaging light passes through the second wave plate, the polarization direction is the same as the second polarization direction. Alternatively, the second wave plate is located between the second analyzer and the imaging lens, and is used to change the polarization direction of the second imaging light. After the second imaging light passes through the second wave plate, the polarization direction is the same as the first polarization direction.

In the embodiment of the present application, the polarization directions of the first imaging light and the second imaging light are unified through the second wave plate. The two imaging lights exit the imaging lens with the same polarization direction, and the same operation (such as ghost elimination, etc.) can be performed on the two imaging lights on the subsequent optical path, simplifying the optical path outside the image generation device.

In a third aspect, embodiments of the present application provide an image generating device. The image generating device includes a light source, a first optical device, an image modulator, a second optical device, a first analyzer, a second analyzer and an imaging lens. Among them, the light source is used to output the beam to the first optical device. The first optical device is used to separate the light beam into a first light beam and a second light beam. The first light beam propagates to the first modulation area of the image modulator, and the second light beam propagates to the second modulation area of the image modulator through the second optical device. The first modulation area of the image modulator is used to modulate the first light beam input by the first optical device according to the first image data, generate the first imaging light, and transmit the first imaging light through the first optical device. The second modulation area is used to modulate the second light beam according to the second image data, generate the second imaging light, and transmit the second imaging light through the second optical device. The first analyzer is used to transmit light in the first polarization direction of the first imaging light. The second analyzer is configured to transmit the light in the first polarization direction or the second polarization direction in the second imaging light, and the second polarization direction is different from the first polarization direction. The imaging lens is used to image the first imaging light passing through the first analyzer and the second imaging light passing through the second analyzer.

In the embodiment of the present application, the first optical device is used to split the light beam output from the light source to obtain two light beams, and the two light beams are separately modulated by the same image modulator to obtain two channels of imaging light, that is, through the first optical device The device divides the imaging light into two paths. In this structure, two channels of imaging light share a light source, an image modulator and an imaging lens. The number of components is small, the structure is simple, and the cost is low. Furthermore, the image modulator is divided into partitions (dividing the first modulation area and the second modulation area) to output two channels of imaging light. Compared with the solution of periodically switching multiple channels of imaging light, there is no need for time matching and period control, which reduces equipment complexity and costs.

In an optional implementation, the first optical device is specifically configured to partially transmit and partially reflect the light beam emitted by the light source. The reflected light beam is the first light beam, and the transmitted light beam is the second light beam.

In the embodiment of the present application, intensity splitting can be performed through the first optical device to control the light intensity of the first light beam and the second light beam, thereby controlling the light intensity of the first imaging light and the second imaging light.

In an optional implementation, the first optical device is a polarizing beam splitter. The first polarization direction and the second polarization direction are perpendicular to each other.

In an optional implementation, the second optical device is a polarizing beam splitter.

In an optional implementation, the first optical device is used to partially transmit and partially reflect the S light, the S light reflected by the first optical device is the first beam, and the S light transmitted by the first optical device is the second beam.

In an optional implementation, the first imaging light modulated by the first modulation region is P light, and the first optical device is used to transmit the first imaging light.

In an optional implementation, the first light beam is S light. The first imaging light modulated by the first modulation region is P light. The first analyzer is used to transmit the P light in the first imaging light.

In the embodiment of the present application, the first polarizer is used to screen out the light beams other than the P light in the first imaging light to prevent the second light beam and/or the second imaging light from being mixed into the first imaging light and affecting the first imaging light. The display effect of the imaging light thereby improves the display clarity of the first imaging light.

In an optional implementation, the first analyzer is an absorption analyzer, configured to absorb light beams other than P light in the first imaging light.

In an optional implementation, the second light beam is S light, and the second optical device is used to reflect the second light beam to the second modulation region.

In an optional implementation, the second imaging light modulated by the second modulation region is P light, and the second optical device is used to transmit the second imaging light.

In an optional implementation, the second light beam is S light. The second imaging light modulated by the second modulation region is P light. The second analyzer is used to transmit the P light in the second imaging light.

In the embodiment of the present application, the second polarizer is used to filter out the light beams other than the P light in the second imaging light to prevent the second light beam and/or other stray light from being mixed into the second imaging light and affecting the second imaging. The display effect of the light is improved, thereby improving the display clarity of the second imaging light.

In an optional implementation, the image generating device further includes a prism group. The prism group may be located on the optical path between the first analyzer, the second analyzer and the imaging lens. The first imaging light emitted from the first analyzer passes through the prism group and then emits to the In the imaging lens, the second imaging light emitted from the second polarizer passes through the prism group and then emits to the imaging lens. Optionally, the prism group is used to make the first imaging light and the second imaging light emit parallel to each other after passing through the prism group.

Optionally, the prism group can also be used to adjust the optical path of the first imaging light from the first analyzer, and/or to adjust the optical path of the second imaging light from the second analyzer. After passing through the prism group, there is a first optical path difference between the first imaging light and the second imaging light. In the embodiment of the present application, the prism group is used to create an optical path difference between the first imaging light and the second imaging light, so that the two imaging lights are imaged on two different focal planes after reflection, achieving bifocal face display.

For the specific structure of the prism group, reference can be made to the description of the second aspect above and will not be described again here.

In an optional implementation, the image generating device further includes a reflecting mirror. The reflecting mirror is used to reflect the second imaging light, and the reflected second imaging light is parallel to the first imaging light, thereby adjusting the optical path of the second imaging light through the reflecting mirror. Alternatively, the reflecting mirror is used to reflect the first imaging light, and the reflected first imaging light is parallel to the second imaging light, thereby adjusting the optical path of the first imaging light through the reflecting mirror. After passing through the reflecting mirror, there is a first optical path difference between the first imaging light and the second imaging light. The embodiment of the present application uses a reflector to create an optical path difference between the first imaging light and the second imaging light, so that the two imaging lights are imaged on two different focal planes after being reflected and imaged, thereby achieving bifocal plane display. .

In an optional implementation, the image generating device further includes a lens group. The lens group is located between the first optical device and the second modulation area and is used to converge the second light beam.

In the embodiment of the present application, the second light beam is converged through the lens group to prevent the second light beam from being incident on the first modulation area, thereby improving the display effect of the first imaging light and the second imaging light.

In an optional implementation, the lens group includes a first lens and/or a second lens. Wherein, the first lens is located between the first optical device and the second optical device. The second lens is located between the second optic and the second modulation region.

In an optional implementation, the second lens is used to adjust the optical path of the second imaging light. After passing through the second lens, there is a first optical path difference between the first imaging light and the second imaging light.

In the embodiment of the present application, through the second lens, the second light beam can be converged to avoid affecting the display effect of the first imaging light and the second imaging light; and the first imaging light and the second imaging light can also be combined. There is an optical path difference between them, so that the two-way imaging light is imaged on two different focal planes after reflection, achieving bifocal plane display.

In an optional implementation, the image modulator further includes an isolation area. The isolation area is located between the first modulation area and the second modulation area.

In the embodiment of the present application, the first light beam and the second light beam can be isolated through the isolation area to prevent the first light beam from being incident on the second modulation area in the adjacent area between the first modulation area and the second modulation area. area, and/or, the second light beam is incident on the first modulation area, causing an impact on the display effect of the first imaging light and/or the second imaging light, thereby improving the display effect of the first imaging light and the second imaging light. Display clarity.

In a fourth aspect, embodiments of the present application provide a display device. The display device includes a processor, and the first aspect, any implementation of the first aspect, the second aspect, any implementation of the second aspect, the third aspect or any implementation of the third aspect. The image generating device described above. Wherein, the processor is used to send the first image data and the second image data to the image modulator in the image generating device.

In an optional implementation, the display device further includes a reflective device. The reflective device is used to reflect and image the imaging light generated by the image generating device.

In a fifth aspect, embodiments of the present application provide a display device. The display device includes a first aspect, any implementation of the first aspect, a second aspect, any implementation of the second aspect, a third aspect or any implementation of the third aspect. The image generating device described in this way. The image generating device is used to project first imaging light and second imaging light onto the windshield.

In a sixth aspect, embodiments of the present application provide a vehicle. The vehicle includes the fourth aspect, the implementation of the fourth aspect, or the display device described in the fifth aspect, and the display device is installed on the vehicle.

In an optional implementation, the vehicle also includes a windshield. The windshield is used to reflect the first imaging light and the second imaging light output by the display device.

Optionally, through reflection by the windshield, the first imaging light and the second imaging light can be imaged on different planes to achieve bifocal plane display.

For the beneficial effects of the fourth to sixth aspects, please refer to the first aspect, the second aspect and the third aspect, and will not be described again here.

In the solutions provided in all the above aspects, the light source may be a light emitting diode or a laser diode. The light emitted by the light source can be natural light or polarized light.

Among the solutions provided in all the above aspects, image modulators include digital micro-mirror device (DMD), micro electromechanical systems (MEMS), liquid crystal on silicon (LCOS) any of them.

Description of drawings

Figure 1a is a schematic diagram of an application scenario of the image generation device of the present application;

Figure 1b is a schematic diagram of the image generation device of the present application in a head-up display scenario;

Figure 1c is a schematic diagram of the image generation device of the present application in a table display scenario;

Figure 2 is a schematic structural diagram of an image generation device provided by an embodiment of the present application;

Figure 3 is a schematic diagram of the position of the analyzer of the image generation device provided by the embodiment of the present application;

Figure 4a is a schematic structural diagram of the first modulation region of the image generation device provided by an embodiment of the present application;

Figure 4b is a schematic structural diagram of the second modulation region of the image generation device provided by an embodiment of the present application;

Figure 5a is a schematic diagram of the position of the first wave plate of the image generation device provided by the embodiment of the present application;

Figure 5b is a schematic diagram of the position of the first wave plate of the image generation device including an isolation area provided by an embodiment of the present application;

Figure 6a is a schematic diagram of the image modulator of the image generation device provided by the embodiment of the present application;

Figure 6b is another schematic diagram of the image modulator of the image generation device provided by the embodiment of the present application;

Figure 7 is a schematic structural diagram of an image generation device including a prism group provided by an embodiment of the present application;

Figure 8 is a schematic structural diagram of a prism group provided by an embodiment of the present application;

Figure 9 is another structural schematic diagram of a prism group provided by an embodiment of the present application;

Figure 10 is a schematic structural diagram of an image generating device including a reflector provided by an embodiment of the present application;

Figure 11 is a schematic structural diagram of an image generation device including a second wave plate provided by an embodiment of the present application;

Figure 12a is a schematic structural diagram of another image generation device provided by an embodiment of the present application;

Figure 12b is a schematic structural diagram of another image generation device provided by an embodiment of the present application;

Figure 13 is a schematic structural diagram of an image generation device including a lens group provided by an embodiment of the present application;

Figure 14 is a schematic structural diagram of an image generation device including an isolation area provided by an embodiment of the present application;

Figure 15 is a schematic diagram of the image generation device provided by the embodiment of the present application applied in a multi-focal plane scenario;

Figure 16 is a schematic diagram of the image generation device provided by the embodiment of the present application applied in a 3D scene;

Figure 17 is a schematic structural diagram of an image generation device HUD provided by an embodiment of the present application;

Figure 18 is a schematic circuit diagram of a display device provided by an embodiment of the present application;

Figure 19 is a schematic functional framework diagram of a vehicle provided by an embodiment of the present application.

Detailed ways

First, the terms that may appear in the embodiments of this application are explained:

Multi-focal plane imaging: imaging on multiple imaging planes (focal planes) at different distances from the human eye.

Imaging of imaging light by the imaging lens: the process by which the imaging lens images the imaging light on the focal plane of the lens.

P-polarized light, S-polarized light: When light penetrates the surface of optical components (such as beam splitters, reflective devices, etc.) at non-vertical angles, the reflection and transmission characteristics depend on the polarization phenomenon. If the polarization direction of the light is on the plane of incidence (parallel to the plane of incidence), it is called P-polarized light (referred to as P light). If the polarization direction of the light is perpendicular to the plane of incidence, it is called S-polarized light (referred to as S light).

Left eye perspective/right eye perspective: Since the positions of human eyes are different, for the same three-dimensional picture, the two-dimensional images received by the left and right eyes are different. In other words, for the same three-dimensional picture, the left and right eyes receive the two-dimensional picture from different perspectives. Therefore, during the image acquisition process of three-dimensional images, it is necessary to use acquisition devices corresponding to the left and right eyes to separately acquire two-dimensional images from the left and right eye perspectives. In the process of collecting three-dimensional images, the angle of view from which the image acquisition device corresponding to the left eye receives the two-dimensional image is called the left eye angle, and the angle from which the image acquisition device corresponding to the right eye receives the two-dimensional image is called the right eye. perspective.

Next, the application scenarios of the image generation device provided by the embodiments of the present application will be described. The image generation device according to the embodiment of the present application is applied in a projection display scene. As shown in Figure 1a, the image generating device projects imaging light on the reflective device. The reflective device reflects the imaging light to the human eye, thereby forming an image on the human eye.

It is worth noting that in addition to imaging on the human eye, it can also be imaged on other subjects. For example, it can be imaged on the image receiving surface of sensors, test equipment, intelligent learning equipment, etc., to achieve detection, debugging, training, etc. of the corresponding equipment. There is no limitation here.

To further refine the scene, the image generation device can be applied to scenes such as head-up display (HUD) and desktop monitors.

As shown in Figure 1b, in the head-up display HUD scenario, the reflective device includes the windshield. The image generating device on the display device outputs imaging light. The imaging light passes through optical devices such as diffusion screens and free-form surface mirrors (referred to as free-form surface mirrors) and is projected onto the windshield. The windshield reflects the imaging light to the human eye, where it forms an image.

It is worth noting that the windshield is only an example of a reflective device. In addition to glass, the reflective device can also be made of other materials, which is not limited here.

In a head-up display scenario, the image generation device may be a picture generation unit (PGU), and the display device may be a HUD. HUD can be applied to vehicles, airplanes and other means of transportation. In addition, HUD can also be used in central control rooms, architectural landscapes, advertising and other scenarios. There are no restrictions here. In scenarios other than transportation, the main function of the windshield in Figure 1b is to reflect imaging light, so the type of reflective device in these scenarios is not limited.

As shown in Figure 1c, in a desktop display scenario, the image generating device on the display device outputs imaging light. The imaging light is reflected by the glass screen and the free-form surface mirror, and projected onto the human eye through the glass screen, where it is imaged.

With the development of projection display technology, multi-focal plane, three-dimensional display and other technologies have gradually emerged. In these technologies, multiple channels of different imaging lights need to be obtained separately. Embodiments of the present application provide an image generation device, a display device, and a vehicle. The image generation device provided by the embodiment of the present application acquires multiple channels of different imaging lights through a highly integrated structure, thereby simplifying the optical path of the image generation device, achieving miniaturization of the image generation device, and reducing costs.

Figure 2 is a schematic structural diagram of an image generating device according to an embodiment of the present application. As shown in Figure 2, the image generating device 200 provided by an embodiment of the present application includes: a light source 210, a first wave plate 220, an image modulator 230, a first detector. Polarizer 240, second analyzer 250 and imaging lens 260. The imaging lens 260 may be called a projection lens.

Wherein, the light source 210 is used to output the light beam to the first wave plate 220 and the first modulation area 231 of the image modulator 230 . The first wave plate 220 is located on the optical path between the light source 210 and the second modulation region 232 of the image modulator 230 .

In this embodiment, the image modulator 230 can implement regional adjustment. The image modulator 230 includes a first modulation area 231 and a second modulation area 232 . The first modulation area 231 is used to modulate the light beam input from the light source 210 according to the first image data to obtain the first imaging light (referred to as the first imaging light), and emit the first imaging light in the first direction. The second modulation area 232 is used to modulate the light beam transmitted from the first wave plate 220 according to the second image data to obtain a second path of imaging light (referred to as the second imaging light), and emit the second imaging light in the second direction. The second imaging light is incident on the second analyzer 250 through the first wave plate 220 . The first imaging light emitted from the first modulation region 231 is incident on the first analyzer 240 .

The first analyzer 240 is used to transmit the light in the first polarization direction in the first imaging light. The second analyzer 250 is used to transmit the light of the second polarization direction in the second imaging light. Wherein, the first polarization direction and the second polarization direction are different. The imaging lens 260 is used to image the first imaging light passing through the first analyzer 240 and the second imaging light passing through the second analyzer 250 .

In the embodiment of the present application, the first imaging light and the second imaging light emit from the image modulator in different propagation directions. On the one hand, there can be an optical path difference between the two paths of imaging light from the image modulator to the imaging lens. , to achieve bifocal display, on the other hand, it can prevent the beam confusion at the edge of the two imaging lights, affecting the display effect of the two imaging lights. In this structure, the two channels of imaging light share the same light source 210, the same image modulator 230, and the same imaging lens 260. The number of components is small, the optical path is simple, the structure is simple, and the cost is low.

Furthermore, the image modulator 230 is divided into partitions (dividing the first modulation area 231 and the second modulation area 232) to output two channels of imaging light. Compared with the solution of obtaining multiple imaging lights at different periods by periodically switching image data, there is no need to match the time of the spectroscopic device and the image modulator, and there is no need to perform periodic control of the spectroscopic device and the image modulator. , which reduces the control difficulty of the equipment, reduces the complexity of the equipment, simplifies the optical path, and reduces the cost.

Optionally, the light beam emitted by the light source 210 may be linearly polarized light, so the light beam incident on the first modulation region 231 and the first wave plate 220 may have the same polarization direction. In addition to linearly polarized light, the light source 210 can also emit circularly polarized light, natural light, etc., and an analyzer (polarizer) or the like can be installed between the light source 210 and the image modulator 230 to filter or convert the light beam emitted from the light source 210 into linear light. Polarized light such that the light beams incident on the first modulation region 231 and the first wave plate 220 have the same polarization direction.

Optionally, the first wave plate 220 may be a 1/4 wave plate. The light beam incident on the first wave plate 220 passes through the first wave plate 220 twice during the process of entering and exiting the second modulation region 232, so that the polarization direction of the resulting second imaging light is rotated by 90° relative to the first imaging light. Since the polarization directions of the light beams incident on the first modulation region 231 and the first wave plate 220 are consistent, the polarization direction of the first imaging light (first polarization direction) and the polarization direction of the second imaging light (second polarization direction) are obtained. ) are perpendicular to each other. Therefore, the directions of the transmission axes of the first analyzer 240 and the second analyzer 250 can be made perpendicular to each other. The light beam with a polarization direction other than the first polarization direction in the first imaging light (for example, the second imaging light or the light beam passing through the first wave plate 220 once) is filtered by the first analyzer 240 and filtered by the second analyzer 250 A light beam with a polarization direction other than the second polarization direction in the second imaging light (for example, the first imaging light or the light beam that passes through the first wave plate 220 once). This avoids the light beams at the edges of the first imaging light and the second imaging light being mixed with each other, and the first imaging light and/or the second imaging light being mixed with other light beams, thereby improving the display effect of the first imaging light and the second imaging light.

In the embodiment of the present application, the propagation direction of the imaging light is as shown in Figure 3. After the light beam emitted by the light source 210 is modulated by the first modulation area 231, the resulting first imaging light emits from the first direction; after being modulated by the second modulation area 232, the obtained first imaging light The second imaging light emerges from the second direction. Alternatively, the image modulator 230 may be a digital micromirror device DMD or a microelectromechanical system MEMS.

In this embodiment, the enlarged structure of the first modulation area 231 of the image modulator 230 is as shown in Figure 4a (ie, Figure A in Figure 3). In the first modulation area 231, the deflection angle of the lens on the corresponding pixel of the effective light (that is, the bright part of the image to be presented by the first image data) is +θ, so that the effective light of the first modulation area 231 is emitted in the first direction. light (i.e. the first imaging light). The deflection angle of the lens on the pixel corresponding to the ineffective light (that is, the pixel corresponding to the dark part of the image to be presented in the first image data) is -θ, thereby emitting the ineffective light of the first modulation area 231 in the second direction (that is, the first The image data is intended to represent the light on the pixels corresponding to the dark parts of the image).

Among them, θ is the deflection angle of the DMD or MEMS lens. θ can be 10°, 12°, 15°, etc., which is not limited in this application.

In the image modulator 200, the first imaging light is incident on the first analyzer 240 for analysis. Optionally, in order to prevent the ineffective light of the first modulation region 231 from being mixed into the first imaging light, the ineffective light of the first modulation region 231 can be emitted outside the first analyzer 240 . For example, as shown in FIG. 3 , since the invalid light in the first modulation area 231 all emerges from the second direction, a line is drawn from the leftmost end of the first modulation area 231 toward the second direction (as shown by the dotted line in FIG. 3 ), if the first analyzer 240 is on the left side of this line, all the invalid light in the first modulation region 231 cannot be incident on the first analyzer 240 . This line corresponds to the extreme position of the right edge of the first analyzer 240 .

In this embodiment, the enlarged structure of the second modulation region 232 of the image modulator 230 is as shown in Figure 4b (ie, Figure B in Figure 3). In the second modulation area 232, the deflection angle of the lens on the corresponding pixel of the effective light (that is, the bright part of the image to be presented by the second image data) is -θ, thereby emitting the effective light of the second modulation area 232 in the second direction. light (i.e. the second imaging light). The deflection angle of the lens on the pixel corresponding to the ineffective light (i.e., the pixel corresponding to the dark part of the image to be presented in the second image data) is +θ, so that the ineffective light of the second modulation area 232 (i.e., the second The image data is intended to represent the light on the pixels corresponding to the dark parts of the image).

In the image modulator 200, the second imaging light is incident on the second analyzer 250 for analysis. Optionally, in order to prevent the ineffective light of the second modulation region 231 from being mixed into the second imaging light, the ineffective light of the second modulation region 232 can be emitted out of the second analyzer 250 . For example, as shown in FIG. 3 , since the ineffective light of the second modulation area 232 all emerges from the first direction, a line is drawn from the rightmost end of the second modulation area 232 toward the first direction (as shown by the dotted line in FIG. 3 ), if the second analyzer 250 is on the right side of this line, all the invalid light in the second modulation region 232 cannot be incident on the second analyzer 250 . This line corresponds to the extreme position of the left edge of the second analyzer 250 .

The possible positions of the first analyzer 240 and the second analyzer 250 are described above. The possible positions of the first wave plate 220 are described below with reference to FIG. 5a and FIG. 5b. In the embodiment of the present application, the first wave plate 220 is used to change the polarization direction of the light beam, so that the second imaging light and the first imaging light have different polarization directions. cooperate with the first analyzer 240 to transmit the light beam of the first polarization direction in the first imaging light (that is, the light beam that has not changed the polarization direction of the first wave plate 220); and cooperate with the second analyzer 250 to transmit the second imaging light The light beam in the second polarization direction (that is, the light beam passing through the first wave plate 220).

Therefore, in order to prevent the first wave plate 220 from interfering with the first imaging light, the first imaging light emitted from the first direction does not pass through the first wave plate 220 . That is, as shown in Figure 5a, if a line is drawn from the rightmost end of the first modulation region 231 toward the first direction (shown as a dotted line in Figure 5a), then the first wave plate 220 is located on the right side of this line. In the embodiment of the present application, this line corresponds to the left extreme position of the left edge of the first wave plate 220 . If the left edge of the first wave plate 220 is located on the right side of this line, the first imaging light will not change the polarization direction through the first wave plate 220, but will directly enter the first analyzer 240 and pass through the first analyzer 240. The polarizer 240 is transparent, which improves the utilization rate of the first imaging light.

In the embodiment of the present application, the first wave plate 220 is used to change the polarization direction of the light beam, so that the polarization directions of the second imaging light and the first imaging light are different. In order to unify the polarization direction of the second imaging light, part of the light beam emitted by the light source 210 is modulated by the second modulation area 232 (to obtain the second imaging light) and is incident on the optical path of the second analyzer 250. This part of the light beam passes through the first The order of the wave plates 220 is the same.

For example, when passing through the first wave plate 220 twice, this part of the light beam passes through the first wave plate 220 once before entering the second modulation area 232, and passes through the first wave plate 220 once after exiting from the second modulation area 232. As shown in Figure 5a, draw a line (shown as a dotted line in Figure 5a) from the leftmost end of the second modulation area 232 to the direction of beam incidence (that is, the direction in which the light beam from the light source 210 is incident on the second modulation area 232), then The leftmost side of the first wave plate 220 is located on the left side of this line, and all light beams incident on the second modulation region 232 pass through the first wave plate 220 once. In the embodiment of the present application, this line corresponds to the right extreme position of the left edge of the first wave plate 220 . If the left edge of the first wave plate 220 is located on the left side of this line, the light beam output by the light source 210 will pass through the first wave plate 220 once before entering the second modulation region 232, so that the light beam incident on the second modulation region 232 have the same polarization direction. The second modulation area 232 modulates the light beam with the same polarization direction, and the resulting second imaging light passes through the first wave plate 220 again, so that the polarization directions of the second imaging light incident on the second analyzer 250 are the same (both is the second polarization direction). Therefore, all the second imaging light can be transmitted through the second analyzer 250, which improves the utilization rate of the second imaging light.

As shown in Figure 5a, if the first modulation area 231 and the second modulation area 232 are adjacent, the left edge of the first wave plate 220 cannot meet the requirements of two extreme positions at the same time (that is, located on the right side of the left extreme position and on the right side of the first modulation area 231. to the left of the extreme position). Therefore, as shown in Figure 5b, an isolation area 233 may also be included in the image modulator 230. The isolation area 233 is located between the first isolation area 231 and the second isolation area 232, and the rightmost end of the first modulation area 231 is isolated from the leftmost end of the second modulation area 232 through the isolation area. Therefore, there can be an area between the two extreme position lines (that is, the triangular area between the two dotted lines and the isolation area in Figure 5b), and the left edge of the first wave plate 220 is in this area, thereby ensuring the first imaging. Utilization efficiency of light and second imaging light.

Part of the light beam emitted by the light source 210 is modulated by the second modulation region 232 (to obtain the second imaging light) and is incident on the optical path of the second analyzer 250 . Optionally, in addition to passing through the first wave plate 220 twice, this part of the light beam may also pass through the first wave plate 220 once or more times. If it passes through the first wave plate 220 once, the first wave plate 220 can be disposed on the optical path between the second imaging light from the second modulation area 232 to the second analyzer 250, and the first wave plate 220 is not This part of the light beam is incident on the optical path of the second modulation region 232 from the light source 210 . Alternatively, the first wave plate 220 can also be disposed on the optical path where the partial light beam is incident from the light source 210 to the second modulation region 232, and the first wave plate 220 is not located on the second modulated light beam. The optical path between the area 232 and the second analyzer 250 is not limited here.

In the embodiment of the present application, the first wave plate 220 is used to change the polarization direction of the light beam, so that the polarization directions of the first imaging light and the second imaging light are different. In addition to the above, the first wave plate 220 is used to change the light beam on the optical path from the light source 210, the first modulation area 232 to the second analyzer 250 (that is, the part of the light beam corresponding to the second imaging light); it can also be used This application does not limit the change of the light beam on the optical path from the light source 210, the first modulation region 231 to the first analyzer 240 (that is, the part of the light beam corresponding to the first imaging light).

It is worth noting that the incident and exit directions of the light beams, the deflection angle of the lens, the limit positions of the first analyzer 240, the limit positions of the second analyzer 250, and the limits of the first wave plate 220 shown in Figures 3 to 5b Location, etc., is just one example. When the incident direction, exit direction, lens deflection angle and other elements of the light beam change, the corresponding limit position can also be obtained based on the above principles, which is not limited in this application.

Optionally, the image modulator 230 may also include more modulation areas for acquiring more paths of imaging light. In the case of more modulation areas, isolation areas can be set between multiple modulation areas, and the deflection angles of the lenses in each modulation area can be the same or different, which is not limited in this application.

For example, image modulator 230 may include 3 modulation areas. As shown in Figure 6a, three isolation areas are arranged parallel to each other and are separated by isolation areas. Adjacent modulation areas can have the same lens deflection angle. In order to prevent the image edges of the two modulation areas from being confused with each other and affecting the display effect, the width of the isolation area between the two modulation areas can be widened. For example, as shown in FIG. 6a , the width of the isolation area between the first modulation area 231 and the second modulation area 232 can be made larger than the width of the isolation area between the second modulation area 232 and the third modulation area. Or, as shown in Figure 6b, the three isolation areas are not parallel to each other, and each pair is separated by an isolation area. Make the deflection directions of multiple isolation areas different from each other. The structures shown in Figure 6a and Figure 6b can also be combined. In multiple isolation areas, the deflection directions of the lenses in some modulation areas are the same and some are different. This application does not limit this. In the same way, the deflection angle, isolation area, etc. under four or more modulation areas can be obtained, which will not be described again here.

The process of transmitting the first imaging light and the second imaging light from the first analyzer 240 and the second analyzer 250 respectively is described above. Next, the optical path after the analyzer is described. The first imaging light emerges from the image modulator 230 along a first direction, and the second imaging light emerges from the image modulator 230 along a second direction. The first wave plate 220, the first analyzer 240 and the second analyzer 250 passing through do not change the propagation direction of the imaging light. Therefore, after emitting from the first analyzer 240 and the second analyzer 250, the propagation directions of the two imaging lights are not the same. Embodiments of the present application can use prism groups, mirrors, etc. to make two channels of imaging light parallel and then incident on the imaging lens 260, unifying the optical paths of the multiple channels of imaging light outside the image generation device, thereby reducing the size of the imaging lens 260 and reducing the size of the imaging lens 260. The volume of the image generating device.

As shown in FIG. 7 , in the embodiment of the present application, the image generation device 200 may further include a prism group 270 . The prism group 270 is located on the optical path between the first analyzer 240 and the imaging lens 260 , and is located on the optical path between the second analyzer 250 and the imaging lens 260 . The first imaging light and the second imaging light are transmitted through different paths in the prism group 270, so that the first imaging light and the second imaging light emerge parallel to each other after passing through the prism group.

In the prism group 270, two, three or more prisms may be included. Next, two prisms are taken as an example to illustrate a possible composition of the prism group 270 . Alternatively, as shown in FIG. 8 , the prism group may include a first prism 271 and a second prism 272 . The first prism 271 is used to transmit the first imaging light from the first analyzer 240 . The first prism 271 is also used to reflect the second imaging light from the second analyzer 250 , and the reflected second imaging light emerges from the first prism 271 . The first imaging light and the second imaging light are parallel to each other after passing through the first prism 271 . The second prism 272 is used to transmit the first imaging light and the second imaging light from the first prism 271 .

As shown in FIG. 9 , the first prism 271 may include a first prism surface (surface 1 in FIG. 9 ), a second prism surface (surface 2 in FIG. 9 ), and a third prism surface (surface 3 in FIG. 9 ). The second prism 272 may include a fourth prism face (face 4 in FIG. 9 ) and a fifth prism face (face 5 in FIG. 9 ). As shown in FIG. 9 , the second imaging light from the second analyzer 250 transmits the first prism surface and is totally reflected by the second prism surface to the third prism surface. After the second imaging light is totally reflected by the third prism surface, it exits from the second prism surface and then enters the second prism 272 . After the second imaging light is emitted from the second prism surface, it is parallel to the first imaging light. The first imaging light from the first analyzer 240 transmits the first prism surface and the second prism surface, and then is incident on the second prism 272 .

Optionally, the first prism 271 and the second prism 272 may be bonded by optical glue, and the bonding surface is located between the second prism surface and the fourth prism surface. An air gap may be left between the second prism surface and the optical glue, so that when the second imaging light is incident on the second prism surface, the total reflection angle requirement of the second imaging light on the second prism surface can be met. The second prism surface and the fourth prism surface may be parallel, so that the angle at which the first imaging light and the second imaging light emerge from the second prism surface remains unchanged from the incident angle to the fourth prism surface.

In the embodiment shown in FIGS. 8 and 9 , the first prism 271 changes the propagation direction of the second imaging light so that the first imaging light and the second imaging light are parallel to each other after passing through the first prism 271 . Optionally, the first prism 271 can also be modified by The propagation direction of the first imaging light is changed so that the first imaging light and the second imaging light are parallel to each other after passing through the first prism 271 . In this solution, the optical path of the first imaging light refers to the optical path of the second imaging light in Figures 8 and 9, and the optical path of the second imaging light refers to the optical path of the first imaging light in Figures 8 and 9, which will not be described again here. .

In addition to using the prism group 270 , embodiments of the present application can also use reflective mirrors to achieve the mutual parallelization of the first imaging light and the second imaging light. As shown in FIG. 10 , in this embodiment of the present application, the image generating device 200 may further include a reflecting mirror 280 . The reflecting mirror 280 is located on the optical path between the second analyzer 250 and the imaging lens 260 . The reflecting mirror 280 is used to reflect the second imaging light, and the reflected second imaging light and the first imaging light are parallel to each other.

Optionally, the reflecting mirror 280 may also be located on the optical path between the first analyzer 240 and the imaging lens 260 . In this structure, the reflector 280 can reflect the first imaging light so that the reflected first imaging light and the second imaging light are parallel to each other.

Referring to FIG. 11 , the image modulator 200 provided in this embodiment may further include a second wave plate 290 . The second wave plate 290 is located between the first analyzer 240 and the imaging lens 260 and is used to change the polarization direction of the first imaging light. After the first imaging light passes through the second wave plate 290, the polarization direction is the same as the second polarization direction (ie, the polarization direction of the second imaging light).

Alternatively, the second wave plate 290 can also be used to change the polarization direction of the second imaging light. In this solution, the second wave plate 290 is located between the second analyzer 250 and the imaging lens 260 for changing the polarization direction of the second imaging light. After the second imaging light passes through the second wave plate 290, the polarization direction is the same as the first polarization direction (ie, the polarization direction of the first imaging light).

In the embodiment of the present application, the polarization directions of the first imaging light and the second imaging light are unified through the second wave plate 290. The two imaging lights emit from the imaging lens 260 in the same polarization direction, and can be aligned on the subsequent optical path. The two channels of imaging light perform the same operation (such as ghost elimination, etc.), which simplifies the light path outside the image generation device.

It is worth noting that in the embodiment of the present application, the isolation area shown in Figures 5b to 6b, the second wave plate 290 shown in Figure 11, and the prism group 270 shown in Figures 7 to 9 or the prism group 270 shown in Figure 8 The reflector 280 shown may appear alone or in combination in the same image generating device 200, and this application is not limited thereto.

In order to obtain multiple channels of imaging light in the image generating device, embodiments of the present application also provide another image generating device structure. As shown in Figure 12a, the image generation device 1200 provided by the embodiment of the present application includes: a light source 1210, a first optical device 1220, a second optical device 1230, an image modulator 1240, a first analyzer 1250, and a second analyzer. 1260 and imaging lens 1270.

Wherein, the light source 1210 is used to output the light beam to the first optical device 1220. The first optical device 1220 is used to divide the light beam into a first light beam and a second light beam. The first light beam propagates to the first modulation area 1241 of the image modulator 1240, and the second light beam propagates to the second modulation area 1242 of the image modulator 1240 via the second optical device 1230. The first modulation area 1241 of the image modulator 1240 is used to modulate the second light beam input by the first optical device 1220 according to the first image data, generate the first imaging light, and transmit the first imaging light through the first optical device 1220 . The second modulation area 1242 of the image modulator 1240 is used to modulate the second light beam according to the second image data, generate second imaging light, and transmit the second imaging light through the second optical device 1230. The first analyzer 1250 is used to transmit light in the first polarization direction of the first imaging light. The second analyzer 1260 is used to transmit the light in the first polarization direction in the second imaging light. The imaging lens 1270 is used to image the first imaging light passing through the first analyzer 1250 and the second imaging light passing through the second analyzer 1260 .

In the embodiment of the present application, the first optical device 1220 is used to split the light beam emitted by the light source, thereby obtaining two paths of imaging light. That is to say, the imaging light is divided into two paths through the first optical device 1220 . In this structure, the two channels of imaging light share the same light source 1210, the same image modulator 1240, and the same imaging lens 1270. This structure has a small number of devices and The structure is simple and the cost is low. On the image modulator 1240, two channels of imaging light are output through partitioning (dividing the first modulation area 1241 and the second modulation area 1242). Compared with the solution of periodically switching multiple channels of imaging light, there is no need for time matching and period control, which reduces equipment complexity and costs.

The light beam output by the light source 1210 may be S light. In this embodiment, a film can be coated on the side of the first optical device 1220 close to the light source 1210, so that the first optical device 1220 serves as a polarizing beam splitter, partially transmitting and partially reflecting S light, and fully transmitting P light. The S light emitted by the light source is incident on the first optical device 1220. The part of the S light reflected by the first optical device 1220 is the first light beam, and the part of the transmitted S light is the second light beam. Since the first optical device 1220 is fully transparent to P light, it can transmit the first imaging light (P light) obtained after modulating the first light beam.

In this embodiment, a film can be coated on the side of the second optical device 1230 close to the first optical device 1220, so that the second optical device 1230 serves as a polarizing beam splitter to achieve total reflection of S light and transmission of P light. The second light beam (S light) from the first optical device 1220 is totally reflected to the second modulation area 1242 through the second optical device 1230 . Since the second optical device 1230 is fully transparent to P light, it can transmit the second imaging light (P light) obtained after modulating the second light beam. Alternatively, the image modulator 1240 may be a liquid crystal on silicon LCOS.

It should be noted that the above only takes coating as an example to illustrate how the first optical device 1220 and the second optical device 1230 have the ability to polarize light splitting. In addition to coating, the functions of the first optical device 1220 and the second optical device 1230 can also be realized through a polarization beam splitter (PBS), etc., which is not limited in this application.

In this embodiment, the light source can also output P light. The first optical device 1220 partially transmits and partially reflects the P light to obtain the first beam and the second beam. The first optical device 1220 and the second optical device 1230 transmit the modulated imaging light ( S light), the specific optical path is similar to the embodiment shown in Figure 12a, and will not be described again here.

In the embodiment of the present application, the intensity of the light source (S light) is split through the first optical device 1220, thereby controlling the respective intensities of the two imaging lights. This embodiment does not require complex optical paths and high-cost structures to achieve light intensity control of two channels of imaging light, simplifying the optical paths and structures, and reducing costs.

In this embodiment, after acquiring two channels of imaging light, the imaging light can be analyzed by a polarizer, thereby preventing the imaging light from being mixed with other light beams and ensuring the image display effect. For example, in the structure shown in Figure 12a, the first analyzer 1250 can be used to transmit the P light in the first imaging light, thereby preventing the second light beam or the second imaging light from mixing into the first imaging light and affecting the first imaging. Light display effect. Alternatively, the first analyzer 1250 may be an absorption type analyzer for absorbing light beams other than P light.

The second analyzer 1260 can be used to transmit the P light in the second imaging light, thereby preventing the second light beam from being mixed into the second imaging light and affecting the display effect of the second imaging light. Optionally, the second analyzer 1260 can be an absorption type analyzer, used to absorb light beams other than P light; or, the second analyzer 1260 can also be a reflection type analyzer, used to reflect light beams other than P light. Beams of light other than light.

In this embodiment of the present application, the first imaging light and the second imaging light output by the first analyzer 1250 and the second analyzer 1260 have the same polarization direction. After the first imaging light and the second imaging light pass through the imaging lens 1270, the first imaging light and the second imaging light have the same polarization direction, and the same operation (such as elimination) can be performed on the first imaging light and the second imaging light. Ghosting, etc.), simplifying the optical path outside the image generating device.

Optionally, embodiments of the present application can also acquire two channels of imaging light with different polarization directions. As shown in Figure 12b, the light beam emitted by the light source 1210 can also be natural light or circularly polarized light, including P light and S light. The first optical device 1220 may divide the light beam from the light source 1210 into a first light beam (P light) and a second light beam (S light). And the P light (first beam) is reflected to the first modulation area 1241, and the S light (second beam) is transmitted to the second optical device 1230. First modulation area 1241 The first light beam (P light) is modulated according to the first image data, and the obtained first imaging light is S light. The first imaging light may transmit through the first optical device 1220 and thereby be projected to the first analyzer 1250.

The second optical device 1230 can reflect S light (second light beam) to the second modulation area 1242. The second modulation area 1242 modulates the second light beam (S light) according to the second image data, and the resulting second imaging light is P light. . The second imaging light may transmit through the second optical device 1230 and thereby be projected to the second analyzer 1260.

Optionally, the first optical device 1220 and the second optical device 1230 may be a polarizing beam splitter PBS or a coated lens, which is not limited in this application.

The first analyzer 1250 is used to transmit the S light in the first imaging light, thereby preventing the first beam or the second imaging light from being mixed into the first imaging light and affecting the display effect of the first imaging light. The second analyzer 1260 is used to transmit the P light in the second imaging light, thereby preventing the second light beam or the first imaging light from being mixed into the second imaging light and affecting the display effect of the second imaging light.

Optionally, in the structure shown in FIG. 12b , the first light beam may be S light and the second light beam may be P light. That is, the first optical device 1220 is made to reflect S light and transmit P light, the second optical device 1230 is made to reflect P light and transmit S light, the first analyzer 1250 is made to transmit P light, and the second analyzer 1260 is made to transmit S light. , this application does not limit this.

Since the first beam and the second beam incident on the image modulator 1240 each have a certain divergence angle, the two beams are parallel to each other. The divergence angle will cause part of the first beam to be incident on the second modulation area 1242 and part of the second beam. It is incident on the first modulation area 1241, thereby affecting the display effects of the first imaging light and the second imaging light. Embodiments of the present application can solve this problem by adding lens groups, isolation areas, etc.

As shown in FIG. 13, the image generating device 1200 may further include a lens group. The lens group is located on the optical path between the first optical device 1220 and the second modulation area 1242 for converging the second light beam. The embodiment of the present application uses a lens group to converge the second light beam, reducing the spot size of the second light beam, thereby preventing the second light beam from being incident on the first modulation area 1241 and affecting the display effects of the first imaging light and the second imaging light. (For example, affecting the intensity of the first imaging light and the second imaging light).

Optionally, the lens group may include a first lens 1281 and/or a second lens 1282. The first lens 1281 is located on the optical path between the first optical device 1220 and the second optical device 1230 . The second lens 1282 is located on the optical path between the second optical device 1230 and the second modulation region 1242 . Among them, through the second lens 1282, the second light beam can be converged to avoid affecting the display effect of the first imaging light and the second imaging light; and there can be an optical path between the first imaging light and the second imaging light. The difference allows the two-channel imaging light to be imaged on two different focal planes after reflection, achieving dual-focal plane display.

Optionally, as shown in Figure 14, the image modulator 1240 may also include an isolation area 1243 located between the first modulation area 1241 and the second modulation area 1242, and the isolation area does not display image content. In the embodiment of the present application, the first light beam and the second light beam are isolated through the isolation area 1243 to prevent the first light beam from being incident on the second modulation area, and/or the second light beam being incident on the first modulation area, causing Effect on the display effect of the first imaging light and/or the second imaging light.

It should be noted that the first lens 1281 and the second lens 1282 appearing in Figure 13 and the isolation area 1243 appearing in Figure 14 can also appear in the structure shown in Figure 12b, and this application is not limited thereto.

The structure of the image generation device provided by the embodiment of the present application has been described above. Next, the application of these image generation devices in some scenes will be described. The image generation device 200 and the image generation device 1200 provided by the embodiments of the present application can be applied in multi-focal plane scenarios. Taking the bifocal plane as an example, as shown in Figure 15, in the image generation device, the optical paths traveled by the first imaging light and the second imaging light are different, and the two imaging lights are incident on the reflective device. The near focal plane and the far focal plane are imaged separately, enabling different images to be displayed on the bifocal plane.

In the embodiment of the present application, the optical path represents the distance traveled by the imaging light from the image modulator. Optionally, in the structure shown in Figures 2 to 5b, the optical path of the second imaging light can be extended through the first wave plate 220; in the structure shown in Figures 7 to 9, the prism group changes the optical path of the second imaging light. The propagation direction of the second imaging light therefore extends the optical path of the second imaging light; in the structure shown in Figure 11, if the second wave plate 290 is located on the optical path between the second analyzer 250 and the imaging lens 260, Then the second wave plate 290 can extend the optical path of the second imaging light. The above structures can extend the optical path of the second imaging light, so that there is an optical path difference between the first imaging light and the second imaging light, and then the second imaging light is imaged on the far focal plane shown in Figure 14. The first The imaging light is imaged on the near focus plane shown in Figure 14. In the embodiment of the present application, the relationship between the first imaging light and the second imaging light can be adjusted by adjusting the refractive index and thickness of the first wave plate 220, the second wave plate 290 and the prism group 270 (for example, the first prism 271). The optical path difference is used to adjust the distance between the near focal plane and the far focal plane.

Optionally, in the structure shown in FIG. 13 , the second lens 1282 located between the second modulation area 1242 and the second optical device 1230 can be used to extend the optical path of the second imaging light, thereby making the first imaging There is an optical path difference between the light and the second imaging light, so that the second imaging light is imaged on the far-focus plane, and the first imaging light is imaged on the near-focus plane.

The above examples take the second imaging light being imaged on the far-focus plane as an example. In fact, the optical path of the first imaging light can also be extended so that the first imaging light is imaged on the far-focus plane and the second imaging light is imaged on the near-focus plane, which is not limited in this application.

In addition, this embodiment can also add one or more lenses, prisms, reflectors, etc. on the optical path between the imaging light from the image modulator to the imaging lens to extend the optical path of the second imaging light or the first imaging light. , so that the two imaging lights are respectively imaged on the near focal plane and the far focal plane, which is not limited in this application.

In addition to multi-focal plane display scenarios, the image generation device provided by embodiments of the present application can also be applied in 3D display scenarios, such as 3DHUD or 3D display scenarios. As shown in Figure 16, in the 3D display scene, the first imaging light and the second imaging light are allowed to carry the image from the left eye perspective and the image from the right eye perspective respectively, and the images from the left and right perspective are reflected to the corresponding people respectively through the reflective device. eyes to obtain a 3D image display effect.

It should be noted that the image generating device in Figure 15 or Figure 16 can be the image generating device 200 described in the aforementioned Figures 2 to 11 or the image generating device 1200 described in the aforementioned Figures 12a to 14. This application will No restrictions.

It is worth noting that the structures shown in Figures 2 to 14 are only exemplary representations of the structure of the image generation device provided by the embodiments of the present application. Structures obtained by adaptive changes based on the above structures also belong to the protection of the embodiments of the present application. The scope is not limited here.

Embodiments of the present application also provide a display device. The display device includes a processor and an image generating device. The image generating device is any one of the aforementioned image generating devices (i.e., the image generating device 200 or the image generating device 200 described in FIGS. 2 to 11 ). 12a to the image generating device 1200 described in FIG. 14). The processor is configured to send first image data and second image data to an image modulator in the image generating device.

Optionally, the display device further includes a reflective device, the image generating device is used to project the first imaging light and the second imaging light on the reflective device, the reflective device is used to project the first imaging light and the second imaging light projected by the image generating device. The second imaging light performs reflection imaging.

Optionally, the display device further includes a power supply for powering the processor and the image generation unit (PGU).

In some examples, the display device is a projector and the reflective device is a light screen. In other examples, the display device is AR glasses. If the display device is a HUD or desktop monitor, the reflective device is a curved mirror.

Optionally, the first imaging light and the second imaging light projected onto the reflective device carry the image from the left eye perspective and the image from the right eye perspective respectively, and are used for imaging in the left eye and right eye of the person respectively (as shown in the figure) shown in 16).

An embodiment of the present application also provides a display device. The display device includes an image generating device. The image generating device is Any of the aforementioned image generating devices (ie, the image generating device 200 shown in FIGS. 2 to 11 or the image generating device 1200 shown in FIGS. 12a to 14 ). The image generating device is used to project imaging light onto the windshield. For example, the display device is a HUD. The first imaging light and the second imaging light projected onto the windshield are imaged on different planes (as shown in Figure 15), achieving bifocal plane display.

The structure of the HUD provided in this embodiment will be described in detail below with reference to FIG. 17 . As shown in Figure 17, the HUD includes an image generating device 1, which is any of the aforementioned image generating devices (i.e., the image generating device 200 described in Figures 2 to 11 or the images described in Figures 12a to 14 Generating device 1200), the image generating device is used to project the first imaging light and the second imaging light on the windshield 2. The first imaging light and the second imaging light are imaged on different planes (near focal plane and far focal plane). Alternatively, the first imaging light and the second imaging light are imaged at different positions, so that the left eye and the right eye of the person receive images corresponding to corresponding viewing angles respectively.

By way of example, the windshield 2 is a windshield of a vehicle. Transportation means include but are not limited to cars, planes, trains or ships.

As shown in Figure 17, the type of HUD can be augmented reality (AR)-HUD. In some examples, the image S is an augmented reality display image, used to display information such as indication information and navigation information of external objects. The indication information of external objects includes but is not limited to safe distance between vehicles, surrounding obstacles and reversing images. Navigation information includes but is not limited to directional arrows, distance and driving time, etc. Optionally, the image S can also be a status display image, used to display status information of the vehicle. Taking a car as an example, the status information of the vehicle includes but is not limited to information such as driving speed, mileage, fuel level, water temperature and headlight status.

Optionally, in a bifocal plane display scene (that is, the scene shown in FIG. 15 ), the status display image can be imaged on the near focus plane, and the augmented reality display image can be imaged on the far focus plane.

Optionally, in order to project the imaging light output by the image generating device to a suitable position on the windshield, the HUD also includes a spatial light path structure for guiding the two imaging lights to different positions on the windshield. The spatial optical path structure includes one or more of the following optical devices: lenses, plane mirrors, curved mirrors, etc. An embodiment of the present application also provides a vehicle, which includes any of the aforementioned display devices and a windshield. The windshield is used to reflect the first imaging light and the second imaging light output by the display device. Transportation means include but are not limited to cars, planes, trains or ships.

Figure 18 is a schematic circuit diagram of a display device provided by an embodiment of the present application. As shown in Figure 18, the circuit in the display device mainly includes a main processor (host CPU) 1101, an external memory interface 1102, an internal memory 1103, an audio module 1104, a video module 1105, a power module 1106, and a wireless communication module 1107. /O interface 1108, video interface 1109, display circuit 1110, modulator 1111, etc. Among them, the main processor 1101 and its peripheral components, such as external memory interface 1102, internal memory 1103, audio module 1104, video module 1105, power module 1106, wireless communication module 1107, I/O interface 1108, video interface 1109, display circuit 1110 can be connected via bus. Main processor 1101 may be referred to as a front-end processor.

In addition, the circuit diagram schematically illustrated in the embodiment of the present application does not constitute a specific limitation on the display device. In other embodiments of the present application, the display device may include more or fewer components than shown in the figures, or some components may be combined, or some components may be separated, or may be arranged differently. The components illustrated may be implemented in hardware, software, or a combination of software and hardware.

Among them, the processor 1101 includes one or more processing units. For example, the processor 1101 may include an application processor (application processor, AP), a modem processor, a graphics processing unit (GPU), an image signal processing unit. (image signal processor, ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processing unit (NPU), etc. . Among them, different processing units can be independent devices, or Can be integrated into one or more processors.

The processor 1101 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in processor 1101 is cache memory. This memory may hold instructions or data that have been recently used or recycled by the processor 1101 . If the processor 1101 needs to use the instructions or data again, it can be called directly from the memory. Repeated access is avoided and the waiting time of the processor 1101 is reduced, thus improving the efficiency of the system.

In some embodiments, the display device may also include a plurality of input/output (I/O) interfaces 1108 connected to the processor 1101 . The interface 1108 may include 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, and a universal asynchronous receiver and transmitter (universal asynchronous receiver/transmitter (UART) interface, mobile industry processor interface (MIPI), general-purpose input/output (GPIO) interface, subscriber identity module (SIM) interface, and/or universal serial bus (USB) interface, etc. The above-mentioned I/O interface 1108 can be connected to devices such as a mouse, touch pad, keyboard, camera, speaker/speaker, microphone, etc., or can be connected to physical buttons on the display device (such as volume keys, brightness adjustment keys, power on/off keys, etc.).

The external memory interface 1102 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the display device. The external memory card communicates with the main processor 1101 through the external memory interface 1102 to implement the data storage function.

Internal memory 1103 may be used to store computer executable program code, which includes instructions. The internal memory 1103 may include a program storage area and a data storage area. Among them, the stored program area can store the operating system, at least one application program required for the function (such as call function, time setting function, etc.). The storage data area can store data created during the use of the display device (such as phone book, world time, etc.). In addition, the internal memory 1103 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, universal flash storage (UFS), etc. The processor 1101 executes various functional applications and data processing of the display device by executing instructions stored in the internal memory 1103 and/or instructions stored in a memory provided in the processor 1101 .

The display device can implement audio functions through the audio module 1104 and an application processor. Such as music playback, phone calls, etc.

The audio module 1104 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. The audio module 1104 can also be used to encode and decode audio signals, such as playing or recording. In some embodiments, the audio module 1104 may be provided in the processor 1101, or some functional modules of the audio module 1104 may be provided in the processor 1101.

The video interface 1109 can receive external audio and video signals, which can be specifically a high definition multimedia interface (HDMI), a digital visual interface (DVI), or a video graphics array (VGA). , display port (display port, DP), etc., the video interface 1109 can also output video. When the display device is used as a head-up display, the video interface 1109 can receive speed signals and power signals input from peripheral devices, and can also receive AR video signals input from the outside. When the display device is used as a projector, the video interface 1109 can receive video signals input from an external computer or terminal device.

The video module 1105 can decode the video input by the video interface 1109, for example, perform H.264 decoding. The video module can also encode the video collected by the display device, such as H.264 encoding of the video collected by an external camera. In addition, the processor 1101 can also decode the video input from the video interface 1109, and then output the decoded image signal to the display circuit 1110.

The display circuit 1110 and the modulator 1111 are used to display corresponding images. In this embodiment, the video interface 1109 receives an externally input video source signal. The video module 1105 decodes and/or digitizes the signal and outputs one or more image signals to the display circuit 1110. The display circuit 1110 drives the modulation according to the input image signal. The detector 1111 images the incident polarized light and then outputs imaging light. For example, the video module 1105 decodes and/or digitizes the video source signal and then outputs the image signal (ie, the above-mentioned first image data and second image data). The display circuit 1110 drives the first modulation area (ie, the above-mentioned first modulation area 231 or the first modulation area 1241) in the modulator 1111 to image the incident polarized light according to the first image data, and then outputs the first imaging light; driving The second modulation area (ie, the above-mentioned second modulation area 232 or the second modulation area 1242) in the modulator 1111 images the incident polarized light according to the second image data, and then outputs the second imaging light. In addition, the main processor 1101 may also output image signals (such as the above-mentioned first image data and second image data) to the display circuit 1110.

In this embodiment, the display circuit 1110 and the modulator 1111 are electronic components in the modulation unit 230, and the display circuit 1110 can be called a driving circuit.

The power module 1106 is used to provide power to the processor 1101 and the light source 110 based on input power (eg, direct current). The power module 1106 may include a rechargeable battery, and the rechargeable battery may provide power to the processor 1101 and the light source 110 . The light emitted by the light source 110 can be transmitted to the modulator 1111 for imaging, thereby forming an image light signal. The light source 110 may be the light source 210 or the light source 1210 in the above embodiment, and the modulator 1111 may be the image modulator 230 or the image modulator 1240 in the above embodiment.

The wireless communication module 1107 can enable the display device to communicate wirelessly with the outside world, and can provide wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) network), Bluetooth (Bluetooth, BT), Global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (infrared, IR) and other wireless communication solutions. The wireless communication module 1107 may be one or more devices integrating at least one communication processing module. The wireless communication module 1107 receives electromagnetic waves through the antenna, frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the main processor 1101 . The wireless communication module 1107 can also receive the signal to be sent from the main processor 1101, frequency modulate it, amplify it, and convert it into electromagnetic waves through the antenna for radiation.

In addition, in addition to being input through the video interface 1109, the video data decoded by the video module 1105 can also be received wirelessly through the wireless communication module 1107 or read from an external memory. For example, the display device can be read from an external memory through a wireless LAN in the car. The terminal device or vehicle entertainment system receives the video data, and the display device can also read the audio and video data stored in the external memory.

The above display device may be installed on a vehicle. Please refer to FIG. 19 . FIG. 19 is a schematic diagram of a possible functional framework of a vehicle provided by an embodiment of the present application.

As shown in Figure 19, the functional framework of the vehicle may include various subsystems, such as the sensor system 12 in the figure, the control system 14, one or more peripheral devices 16 (one is shown as an example in the figure), a power supply 18. Computer system 20 and head-up display system 22. Optionally, the vehicle may also include other functional systems, such as an engine system that provides power for the vehicle, etc., which is not limited in this application.

Among them, the sensor system 12 may include several detection devices, which can sense the measured information and convert the sensed information into electrical signals or other required forms of information output according to certain rules. As shown in the figure, these detection devices may include a global positioning system (GPS), vehicle speed sensor, inertial measurement unit (IMU), radar unit, laser rangefinder, camera device, wheel speed sensor, Steering sensors, gear sensors, or other components used for automatic detection, etc. are not limited in this application.

The control system 14 may include several elements, such as the illustrated steering unit, braking unit, lighting system, autonomous driving system, etc. system, map navigation system, network time synchronization system and obstacle avoidance system. Optionally, the control system 14 may also include components such as a throttle controller and an engine controller for controlling the driving speed of the vehicle, which are not limited in this application.

Peripheral device 16 may include several elements, such as a communication system, a touch screen, a user interface, a microphone and a speaker as shown, among others. Among them, the communication system is used to realize network communication between vehicles and other devices other than vehicles. In practical applications, the communication system can use wireless communication technology or wired communication technology to realize network communication between vehicles and other devices. The wired communication technology may refer to communication between vehicles and other devices through network cables or optical fibers.

The power source 18 represents a system that provides power or energy to the vehicle, which may include, but is not limited to, rechargeable lithium batteries or lead-acid batteries, etc. In practical applications, one or more battery components in the power supply are used to provide electric energy or energy for starting the vehicle. The type and material of the power supply are not limited in this application.

Several functions of the vehicle are controlled by the computer system 20 . The computer system 20 may include one or more processors 2001 (one processor is shown as an example) and a memory 2002 (which may also be referred to as a storage device). In practical applications, the memory 2002 may also be inside the computer system 20 or outside the computer system 20 , for example, as a cache in a vehicle, etc., which is not limited by this application. in,

Processor 2001 may include one or more general-purpose processors, such as a graphics processing unit (GPU). The processor 2001 may be used to run relevant programs or instructions corresponding to the programs stored in the memory 2002 to implement corresponding functions of the vehicle.

Memory 2002 may include volatile memory (volatile memory), such as RAM; memory may also include non-volatile memory (non-vlatile memory), such as ROM, flash memory (flash memory), HDD or solid state drive SSD; memory 2002 may also include combinations of the above types of memories. The memory 2002 can be used to store a set of program codes or instructions corresponding to the program codes, so that the processor 2001 can call the program codes or instructions stored in the memory 2002 to implement corresponding functions of the vehicle. This function includes but is not limited to some or all of the functions in the vehicle function framework diagram shown in Figure 16. In this application, a set of program codes for vehicle control can be stored in the memory 2002, and the processor 2001 calls the program codes to control the safe driving of the vehicle. How to achieve safe driving of the vehicle will be described in detail below in this application.

Optionally, in addition to storing program codes or instructions, the memory 2002 may also store information such as road maps, driving routes, sensor data, and the like. The computer system 20 can be combined with other elements in the vehicle functional framework diagram, such as sensors in the sensor system, GPS, etc., to implement vehicle-related functions. For example, the computer system 20 can control the driving direction or driving speed of the vehicle based on data input from the sensor system 12 , which is not limited in this application.

The head-up display system 22 may include several elements, such as a windshield (front glass), a controller and a display device (head-up display HUD) in the previous embodiment. The controller is used to generate images according to user instructions (for example, generate images containing vehicle status such as vehicle speed, power/fuel level, and images of augmented reality AR content), and send the image to the head-up display HUD for display; the head-up display HUD can include images The generation unit PGU, reflector combination, and front glass are used to cooperate with the head-up display to realize the light path of the head-up display system so that the target image is presented in front of the driver. It should be noted that the functions of some components in the head-up display system can also be implemented by other subsystems of the vehicle. For example, the controller can also be a component in the control system.

Among them, Figure 19 of this application shows that it includes four subsystems. The sensor system 12, the control system 14, the computer system 20 and the head-up display system 22 are only examples and do not constitute a limitation. In practical applications, vehicles can combine several components in the vehicle according to different functions to obtain subsystems with corresponding different functions. In actual applications, the vehicle may include more or fewer systems or components, which is not limited by this application.

The above-mentioned means of transportation can be cars, trucks, motorcycles, buses, boats, airplanes, helicopters, lawn mowers, recreational vehicles, playground vehicles, construction equipment, trams, golf carts, trains, and trolleys. Application examples are not Make special restrictions.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code.

Claims

An image generating device, characterized in that it includes:

a light source for outputting the light beam to the first wave plate and the first modulation area of the image modulator;

The first wave plate is located on the optical path between the light source and the second modulation area of the image modulator;

The image modulator includes the first modulation area and the second modulation area. The first modulation area is used to modulate the light beam input by the light source according to the first image data and emit the first image in the first direction. light to the first polarizer; the second modulation area is used to modulate the light beam transmitted from the first wave plate according to the second image data, and emit the second imaging light in the second direction, the second imaging light It is incident on the second polarizer through the first wave plate;

The first analyzer is used to transmit light in the first polarization direction of the first imaging light;

The second analyzer is used to transmit light of a second polarization direction in the second imaging light, where the second polarization direction is different from the first polarization direction;

An imaging lens is used to image the first imaging light passing through the first analyzer and the second imaging light passing through the second analyzer.
The device according to claim 1, wherein the first wave plate is a quarter wave plate, and the first polarization direction and the second polarization direction are perpendicular to each other.
The device according to claim 1 or 2, characterized in that the device further includes:

A prism group for transmitting the first imaging light and the second imaging light through different paths in the prism group, and the first imaging light and the second imaging light are parallel to each other after passing through the prism group. Shoot out.
The device according to claim 3, wherein the prism group includes a first prism and a second prism;

The first prism is used to transmit the first imaging light from the first analyzer and reflect the second imaging light from the second analyzer. The reflected third Two imaging lights emerge from the first prism, and the first imaging light and the second imaging light are parallel to each other after passing through the first prism;

The second prism is used to transmit the first imaging light from the first prism and the second imaging light from the first prism to the imaging lens.
The device according to claim 4, wherein the first prism includes a first prism surface, a second prism surface and a third prism surface;

The second imaging light from the second analyzer transmits the first prism surface, is totally reflected by the second prism surface to the third prism surface, and is totally reflected by the third prism surface. The second prism surface emits;

The first imaging light from the first analyzer transmits the first prism surface and the second prism surface.
The device according to claim 1 or 2, characterized in that the device further includes:

A reflecting mirror, used to reflect the second imaging light, and the reflected second imaging light is parallel to the first imaging light; or, used to reflect the first imaging light, and the reflected first imaging light is parallel to the first imaging light. The second imaging light is parallel.
The device according to any one of claims 1 to 6, wherein the image modulator further includes an isolation area located between the first modulation area and the second modulation area.
The device according to any one of claims 1 to 7, further comprising: a second wave plate;

The second wave plate is located between the first polarizer and the imaging lens and is used to change the polarization direction of the first imaging light. After the first imaging light passes through the second wave plate, The polarization direction is the same as the second polarization direction; or,

The second wave plate is located between the second analyzer and the imaging lens and is used to change the polarization direction of the second imaging light. After the second imaging light passes through the second wave plate, The polarization direction is the same as the first polarization direction.
The device according to any one of claims 1 to 8, wherein the image modulator includes any one of a digital micromirror device (DMD) and a microelectromechanical system (MEMS).
An image generating device, characterized in that it includes:

A light source for outputting a light beam to the first optical device;

A first optical device for dividing the light beam into a first light beam and a second light beam. The first light beam propagates to the first modulation area of the image modulator. The second light beam is reflected by the second optical device to the first light beam. the second modulation area of the image modulator;

The first modulation area of the image modulator is used to modulate the first light beam according to the first image data, generate first imaging light, and transmit the first imaging light to the first through the first optical device. Analyzer; the second modulation area of the image modulator is used to modulate the second light beam according to the second image data, generate second imaging light, and transmit the second imaging through the second optical device The light reaches the second polarizer;

The first polarizer is used to transmit light in the first polarization direction of the first imaging light;

The second analyzer is used to transmit the light in the first polarization direction or the second polarization direction in the second imaging light, and the second polarization direction is different from the first polarization direction;

The imaging lens is used to image the first imaging light passing through the first analyzer and the second imaging light passing through the second analyzer.
The device according to claim 10, wherein the first optical device is specifically used to partially transmit and partially reflect the light beam, the reflected light beam is the first light beam, and the transmitted light beam is the third light beam. Two beams.
The device according to claim 10 or 11, characterized in that both the first optical device and the second optical device are polarizing beam splitters.
The device according to any one of claims 10 to 12, wherein the first light beam is S-polarized light;

The first imaging light modulated by the first modulation region is P-polarized light;

The first analyzer is used to transmit P-polarized light in the first imaging light.
The device according to any one of claims 10 to 13, wherein the second light beam is S-polarized light;

The second imaging light modulated by the second modulation region is P-polarized light;

The second analyzer is used to transmit P-polarized light in the second imaging light.
The device according to any one of claims 10 to 14, characterized in that the device further includes:

A lens group is located on the optical path between the first optical device and the second modulation area, and is used to converge the second light beam.
The device according to claim 15, wherein the lens group includes a first lens and/or a second lens; the first lens is located between the first optical device and the second optical device, The second lens is located between the second optical device and the second modulation region.
The device according to any one of claims 10 to 16, wherein the image modulator further includes an isolation area located between the first modulation area and the second modulation area.
The device according to any one of claims 10 to 17, characterized in that the image modulator comprises a liquid crystal on silicon LCOS chip.
A display device, characterized by comprising a processor and the image generating device according to any one of claims 1 to 18;

The processor is configured to send the first image data and the second image data to an image modulator in the image generating device.
The display device according to claim 19, further comprising:

A reflective device used to reflect the imaging light generated by the image generating device.
A vehicle, characterized in that it includes the display device according to any one of claims 19 to 20, and the display device is installed on the vehicle.
The vehicle according to claim 21, further comprising a windshield that reflects the first imaging light and the second imaging light output by the display device.