CN114428406A - Head-up display system and image display method based on head-up display system - Google Patents
Head-up display system and image display method based on head-up display system Download PDFInfo
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/014—Head-up displays characterised by optical features comprising information/image processing systems
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
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Abstract
The embodiment of the application discloses a head-up display system and an image display method based on the head-up display system. The HUD system includes a PGU and an optical element. The PGU comprises a light source, an image display module, an image modulation module and a controller. The light source emits a light beam to the image display module. The controller loads the first image information and the second image information to the image display module and loads the first modulation signal and the second modulation signal to the image modulation module. The image display module generates a first image corresponding to the first image information and a second image corresponding to the second image information. The image modulation module modulates the first image according to the first modulation signal and modulates the second image according to the second modulation signal. The optical element images the modulated first and second images and directs the imaged first and second images to an imaging region, wherein the imaged first and second images have different imaging positions.
Description
Technical Field
The present disclosure relates to the field of image display, and more particularly, to a head-up display system and an image display method based on the same.
Background
The Head-up Display (HUD) system is used for directly displaying important information (instruments, navigation and the like) in driving in front of a front windshield, so that a driver can obtain the important information without frequently lowering the Head, and the driving safety is improved.
With the development of technology, HUD systems need larger display areas, and different imaging distances. According to the optical principle, a single imaging system cannot realize a larger display area due to the limitation of the processing technology of the imaging system (free-form surface mirror, aspherical mirror, etc.). The current industry is to achieve a larger display area by splicing a plurality of independent heads-up display systems. However, this method needs to be implemented by means of a plurality of image generation units, which increases the implementation cost.
Disclosure of Invention
The embodiment of the application discloses a head-up display system and an image display method based on the same, which enlarge a projection area observable by human eyes, can be realized by only one image generation unit, and reduce the realization cost.
In a first aspect, the present application provides a HUD system. The HUD system includes an image Generation Unit (PGU) and an optical element. The PGU comprises a light source, an image display module, an image modulation module and a controller. The light source emits a light beam to the image display module. The controller loads the first image information and the second image information to the image display module and loads the first modulation signal and the second modulation signal to the image modulation module. The image display module generates a first image corresponding to the first image information according to the light beam, generates a second image corresponding to the second image information according to the light beam, and projects the first image and the second image to the image modulation module. The image modulation module modulates the first image according to the first modulation signal, modulates the second image according to the second modulation signal, and projects the modulated first image and the modulated second image to the optical element. The optical element images the modulated first and second images and directs the imaged first and second images to an imaging region, wherein the imaged first and second images have different imaging positions.
It should be noted that the HUD system described above may be applied to a vehicle, and then the HUD system projects the imaged first image and second image onto a windshield of the vehicle, and reflects the imaged first image and second image by the windshield for human eyes to receive.
In this embodiment, a plurality of different modulation signals are loaded on the image modulation module, and then a plurality of images are modulated respectively, so as to realize that the deflection angles of the plurality of modulated images are different. So that the plurality of imaged images have different imaging positions in space. The human eye can observe and resolve different images. The HUD system enlarges the observable projection area of human eyes, and can be realized only by one image generation unit, thereby reducing the realization cost.
In some possible embodiments, the controller loads the first image information to the first area of the image display module, loads the second image information to the second area of the image display module, loads the first modulation signal to the first area of the image modulation module, and loads the second modulation signal to the second area of the image modulation module.
In this embodiment, based on the partitions of the image display module and the image modulation module, the image modulation module can perform synchronous modulation on a plurality of images, thereby improving the modulation efficiency.
In some possible embodiments, the controller loads the image display module with first image information during a first period, loads the image display module with second image information during a second period, loads the image modulation module with a first modulation signal during the first period, and loads the image modulation module with a second modulation signal during the second period.
In this embodiment, the image modulation module modulates the first image and the second image in a time-division modulation manner. The image display module and the image modulation module do not need to be partitioned, the image display module and the image modulation module can be made smaller, and cost is saved.
In some possible embodiments, the image modulation module is a Liquid Crystal On Silicon (LCOS), the first modulation signal includes first phase information and first grating information, and the second modulation signal includes second phase information and second grating information. The embodiment provides a specific implementation mode of the image modulation module, and the practicability of the scheme is improved.
In some possible embodiments, the image modulation module is a liquid lens, the first modulation signal is a first voltage, and the second modulation signal is a second voltage. The embodiment provides another specific implementation mode of the image modulation module, and the expansibility of the scheme is improved.
In some possible embodiments, the HUD system further includes a first diffuser screen and a second diffuser screen. The image modulation module is used for projecting the modulated first image to the first diffusion screen and projecting the modulated second image to the second diffusion screen. The first diffusion screen is used for diffusing the modulated first image and guiding the diffused first image to the optical element. The second diffusion screen is used for diffusing the modulated second image and guiding the diffused second image to the optical element.
In this embodiment, a plurality of diffusion screens may be disposed between the image generating unit and the optical element, and used to diffuse the plurality of modulated images, so as to enlarge the imaging angle and improve the display effect.
In some possible embodiments, the optical element is a transmissive element or a reflective element. The optical element is also used for amplifying the modulated first image and the second image, thereby improving the display effect.
In a second aspect, the present application provides an image display method based on a HUD system. The HUD system comprises a PGU and an optical element, wherein the PGU comprises a light source, an image display module, an image modulation module and a controller; the method comprises the following steps:
emitting a light beam to the image display module through a light source;
loading first image information and second image information to an image display module through a controller, and loading a first modulation signal and a second modulation signal to an image modulation module;
generating a first image corresponding to the first image information according to the light beam through an image display module, generating a second image corresponding to the second image information according to the light beam, and projecting the first image and the second image to an image modulation module;
modulating the first image according to the first modulation signal through the image modulation module, modulating the second image according to the second modulation signal, and projecting the modulated first image and the modulated second image to the optical element;
and imaging the modulated first image and the modulated second image through the optical element, and guiding the imaged first image and the imaged second image to an imaging area, wherein the imaged first image and the imaged second image have different imaging positions.
In some possible embodiments, the method further comprises:
the controller loads first image information to a first area of the image display module, loads second image information to a second area of the image display module, loads a first modulation signal to the first area of the image modulation module, and loads a second modulation signal to the second area of the image modulation module.
In some possible embodiments, the method further comprises:
the controller loads first image information to the image display module in a first time interval, loads second image information to the image display module in a second time interval, loads a first modulation signal to the image modulation module in the first time interval, and loads a second modulation signal to the image modulation module in the second time interval.
In some possible embodiments, the image modulation module is a liquid crystal on silicon LCOS, the first modulation signal includes first phase information and first grating information, and the second modulation signal includes second phase information and second grating information.
In some possible embodiments, the image modulation module is a liquid lens, the first modulation signal is a first voltage, and the second modulation signal is a second voltage.
In some possible embodiments, the HUD system further comprises a first diffuser screen and a second diffuser screen; the method further comprises the following steps:
and projecting the modulated first image to the first diffusion screen and projecting the modulated second image to the second diffusion screen through the image modulation module. The modulated first image is diffused by the first diffusion and directed to the optical element. The modulated second image is diffused by a second diffusion screen and directed to an optical element.
In some possible embodiments, the optical element is a transmissive element or a reflective element; the method further comprises the following steps:
the modulated first and second images are magnified by an optical element.
In a third aspect, the present application provides a vehicle comprising the HUD system of any one of the embodiments of the first aspect, wherein the HUD system projects the imaged first and second images onto a windshield of the vehicle and reflects the imaged first and second images off the windshield for human eye reception.
In the embodiment of the application, the image display module is loaded with a plurality of pieces of image information, so that a plurality of images can be generated according to light beams from the light source, and the plurality of images are projected to the image modulation module. The image modulation module is loaded with a plurality of different modulation signals, and then modulates a plurality of images respectively, so as to realize different deflection angles of the plurality of modulated images. The optical element images the modulated images, and the imaged images have different imaging positions in space. So that the human eye can observe and resolve different images. The HUD system enlarges the observable projection area of human eyes, and can be realized only by one image generation unit, thereby reducing the realization cost.
Drawings
FIG. 1 is a block diagram of a first display system provided herein;
FIG. 2 is a schematic diagram of a first structure of an image generating unit in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a partition modulation method for an image according to an embodiment of the present disclosure;
FIG. 4 is a timing diagram illustrating time-division modulation of an image according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a phase diagram provided herein;
FIG. 6 is a block diagram of a second display system provided herein;
FIG. 7 is a block diagram of a third display system provided herein;
FIG. 8 is a block diagram of a fourth display system provided herein;
fig. 9 is a schematic diagram of an image display method based on the HUD system according to this embodiment.
Detailed Description
The embodiment of the application provides a head-up display system and an image display method based on the head-up display system, which enlarge a projection area observable by human eyes, can be realized by only one image generation unit, and reduces the realization cost. The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The application is mainly applied to a Head-up Display (HUD) system. The HUD system provided by the present application is described below with reference to fig. 1.
Fig. 1 is a structural diagram of a first display system provided in the present application. The display system includes a HUD system, wherein the HUD system includes an image Generation Unit (PGU) 10 and an optical element 20. The image generating unit 10 is configured to generate an image and project a light beam corresponding to the image to the optical element 20. The optical element 20 images an image and guides the imaged image to an imaging area. Optionally, the display system may be applied to a vehicle, and the display system further includes a windshield 30 of the vehicle, and the windshield 30 reflects the imaged image for receiving by human eyes. Wherein reflection of the image through windshield 30 forms a virtual image visible to the human eye in the imaging area of windshield 30 on the side away from the observer. It will be appreciated that windshield 30, as depicted in fig. 1, may be another type of element in other possible application scenarios, such as an imaging screen onto which the image imaged by the HUD system is projected. For convenience of description, the following description will be made in a context of the HUD system applied to a vehicle.
It should be noted that, in the present embodiment, the image generation unit 10 may generate a plurality of different images, and the light beam corresponding to each image will be projected to the optical element 20 at different angles. The imaging through optical element 20 and reflection off windshield 30 may form a plurality of virtual images visible to the human eye. The image generation unit 10 modulates different images differently, so that the different images are imaged at different positions in space. Thus, the observer can see virtual images of different images, such as the first and second images shown in fig. 1, at different areas through the windshield. Also, the distance between different virtual images and the human eye may be different. The image generation unit 10 will be described in detail below.
Fig. 2 is a schematic diagram of a first structure of an image generation unit in an embodiment of the present application. The image generation unit 10 includes a light source 101, an image display module 102, an image modulation module 103, and a controller 104. The light source 101 emits a light beam to the image display module 102. The image display module 102 may be loaded with a plurality of image information, such as first image information and second image information, under the control of the controller 104. Further, the image display module 102 generates an image corresponding to image information, for example, a first image corresponding to the first image information and a second image corresponding to the second image information, according to the light beam emitted by the light source 101. The image display module 102 also projects the generated first and second images to the image modulation module 103. The image modulation module 103 can be controlled by the controller 104 to load a plurality of modulation signals and modulate different images from the image display module 102 according to different modulation signals. For example, the image modulation module 103 modulates a first image according to a first modulation signal and modulates a second image according to a second modulation signal. Further, the modulated first image and the modulated second image are projected to different regions of the optical element 102 at different incident angles.
In this embodiment, the light source 101 is a laser light source that can emit red, green, and blue light. The image Display module 102 may be a device having an image Display function, such as a Liquid Crystal Display (LCD) or a Liquid Crystal On Silicon (LCOS). The image information loaded on the image display module 102 may specifically be a magnitude spectrum or a phase spectrum of the image.
It should be noted that the image modulation module 103 modulates the plurality of images, which includes two embodiments of partition modulation and time division modulation, and the following description is separately given:
first, implementation of zone modulation.
Fig. 3 is a schematic structural diagram of a partition modulation performed on an image in the embodiment of the present application. Specifically, both the image display module 102 and the image modulation module 103 may be divided into a plurality of regions, and the regions divided on the image display module 102 correspond to the regions divided on the image modulation module 103 on a one-to-one basis. Different areas on the image display module 102 are used to load different image information. For example, a first area of the image display module 102 loads first image information and a second area of the image display module 102 loads second image information. Accordingly, different areas of the image modulation module 103 are used to load different modulation signals. For example, a first area of the image modulation module 103 is loaded with a first modulation signal, and a second area of the image modulation module 103 is loaded with a second modulation signal. It is understood that the image modulation module 103 may modulate a plurality of images simultaneously based on the partitions of the image display module 102 and the image modulation module 103.
Second, time division modulation.
Fig. 4 is a timing diagram illustrating time-division modulation of an image according to an embodiment of the present disclosure. Specifically, the image display module 102 is controlled by the controller 104 to load different image information at different time periods. The image modulation module 103 is controlled by the controller 104 to load different modulation signals at different time periods. The controller 104 controls the image display module 102 and the image modulation module 103 at the same timing. Preferably, the image display module 102 is loaded with different image information alternately, and the image modulation module 103 is loaded with different modulation signals alternately. For example, as shown in fig. 4, the control timing corresponding to the first image is staggered with the control timing corresponding to the second image. In a period 1, the image display module 102 loads first image information, and the image modulation module 103 loads a first modulation signal; in the time period 2, the image display module 102 loads the second image information, and the image modulation module 103 modulates the second modulation signal; in period 3, the image display module 102 loads the first image information, the image modulation module 103 loads the first modulation signal, and so on. It is understood that the image modulation module 103 has a fast response capability such that the display frequency of the first image and the second image is higher than the response frequency of the human eye, which can observe the first image and the second image simultaneously.
It should be noted that, in practical applications, a plurality of different types of image modulation modules 103 may be used to implement the modulation of the image, which will be described separately below.
The first type of image modulation module is a phase-type LCOS.
In this embodiment, the modulation signal loaded on the LCOS includes phase information and grating information. The phase information and the grating information may be embodied in the form of a phase diagram. Fig. 5 is a schematic diagram of a phase diagram provided in the present application. As shown in fig. 5, the LCOS may modulate the first image according to the first phase map and modulate the second image according to the second phase map. It can be seen that the parameters such as the radius of the circular ring and the slit length between the circular rings in the first phase diagram and the second phase diagram are different, so that the phase information and the grating information presented by different phase diagrams are different.
The phase information may be a fresnel phase, the radius of the mth ring of which is indicated as
Wherein λ is the wavelength of the light wave corresponding to the first image or the second image, and f is the focal length of the fresnel lens equivalent to the fresnel phase. It will be appreciated that the different radii of the rings in the different phase information will result in different focal lengths of their equivalent fresnel lenses, and thus different imaging distances of the LCOS-modulated first and second images. For example, as shown in fig. 1, the first image is farther away from the human eye and the second image is closer to the human eye.
The deflection angle of the image can be changed by modulating according to different grating information. The deflection angle thetam satisfies the following expression d (sin theta)m+sinθi) M λ. Where θ i is an incident angle of light in the LCOS, d is a slit length, i.e., a grating constant, and λ is a wavelength of a light wave corresponding to the first image or the second image. It should be understood that the different grating constants in the different grating information will result in different deflection angles of the images, thereby avoiding visual interference of the first and second images after LCOS modulation due to overlap.
It should be noted that the modulation scheme of the LCOS includes the above-mentioned partition modulation and time division modulation, and is not described herein again.
In the second type, the image modulation module is a liquid lens.
In this embodiment, the modulation signal applied to the liquid lens is specifically a voltage. The surface tension of the liquid lens can be changed by changing the loading voltage on the liquid lens, thereby changing the focal length of the liquid lens and the deflection angle of the image. So that the different images are imaged at different positions in space. For example, the liquid lens modulates a first image according to a first voltage applied thereto, and modulates a second image according to a second voltage applied thereto. The specific modulation method includes the above-mentioned partition modulation and time division modulation, which are not described herein again.
In some possible embodiments, a plurality of diffusion screens may be further disposed between the image generating unit 10 and the optical element 20, and are used for diffusing the plurality of modulated images, so as to enlarge the imaging angle, and thus improve the display effect. For example, fig. 6 is a structural diagram of a second display system provided in the present application. Also included in the HUD system are a first diffuser screen 40 and a second diffuser screen 50. The first diffuser screen 40 is used to diffuse the modulated first image and direct the diffused first image to the optical element 20. The second diffuser screen 50 is used to diffuse the modulated second image and direct the diffused second image to the optical element 20. It should be understood that since the imaging distances of the modulated first and second images are different, the distances between the first and second diffusion screens 40 and 50 and the image generation unit 10 are also different.
Note that the diffusion screen shown in fig. 6 is a transmission type diffusion screen. In addition, a reflective diffusion screen may be used, that is, the diffusion screen reflects the diffused image to the optical element 20, and the embodiment is not limited herein.
In some possible embodiments, there may be a plurality of types of optical elements 20, and the number of optical elements 20 may be one or more. The following description is made with reference to certain exemplary embodiments.
First, the optical element 20 may be a reflective element, such as a free-form surface mirror, an aspherical mirror, or a reflective LCOS. The specific optical path is shown in fig. 1.
Mode two, fig. 7 is a structural diagram of a third display system provided in the present application. The optical element 20 may be a transmissive element such as a lens or a transmissive LCOS or the like. The specific optical path is shown in fig. 6.
Mode three, fig. 8 is a structural diagram of a fourth display system provided in the present application. The HUD system includes an imaging system comprised of a plurality of optical elements 20. For example, the modulated first and second images are directed toward windshield 30 via reflection by first reflective element 20a and reflection by second reflective element 20 b.
It should be noted that the optical element 20 may also enlarge the first image and the second image to enhance the display effect.
In the embodiment of the application, the image display module is loaded with a plurality of pieces of image information, so that a plurality of images can be generated according to light beams from the light source, and the plurality of images are projected to the image modulation module. The image modulation module is loaded with a plurality of different modulation signals, and then modulates a plurality of images respectively, so as to realize different deflection angles of the plurality of modulated images. The optical element images the modulated images, and the imaged images have different imaging positions in space. So that the human eye can observe and resolve different images. The HUD system enlarges the projection area which can be observed by human eyes, can be realized by only one image generation unit, and reduces the realization cost.
Referring to fig. 9, fig. 9 is a schematic diagram illustrating an image display method based on the HUD system according to this embodiment. The HUD system comprises an image generation unit and an optical element, wherein the image generation unit comprises a light source, an image display module, an image modulation module and a controller; the image display method includes:
901. the light beam is emitted to the image display module by the light source.
902. The controller loads the first image information and the second image information to the image display module, and loads the first modulation signal and the second modulation signal to the image modulation module.
903. And generating a first image corresponding to the first image information according to the light beam through the image display module, generating a second image corresponding to the second image information according to the light beam, and projecting the first image and the second image to the image modulation module.
904. And modulating the first image according to the first modulation signal through the image modulation module, modulating the second image according to the second modulation signal, and projecting the modulated first image and the modulated second image to the optical element.
905. And imaging the modulated first image and the modulated second image through the optical element, and guiding the imaged first image and the imaged second image to an imaging area, wherein the imaged first image and the imaged second image have different imaging positions.
Optionally, in some possible embodiments, the method further comprises:
the controller loads first image information to a first area of the image display module, loads second image information to a second area of the image display module, loads a first modulation signal to the first area of the image modulation module, and loads a second modulation signal to the second area of the image modulation module.
Optionally, in some possible embodiments, the method further comprises:
the controller loads first image information to the image display module in a first time interval, loads second image information to the image display module in a second time interval, loads a first modulation signal to the image modulation module in the first time interval, and loads a second modulation signal to the image modulation module in the second time interval.
Optionally, in some possible embodiments, the image modulation module is an LCOS, the first modulation signal includes first phase information and first grating information, and the second modulation signal includes second phase information and second grating information.
Optionally, in some possible embodiments, the image modulation module is a liquid lens, the first modulation signal is a first voltage, and the second modulation signal is a second voltage.
Optionally, in some possible embodiments, the HUD system further comprises a first diffuser screen and a second diffuser screen; the method further comprises the following steps:
and projecting the modulated first image to the first diffusion screen and projecting the modulated second image to the second diffusion screen through the image modulation module. The modulated first image is diffused by the first diffusion and directed to the optical element. The modulated second image is diffused by a second diffusion screen and directed to an optical element.
Optionally, in some possible embodiments, the optical element is a transmissive element or a reflective element; the method further comprises the following steps:
the modulated first and second images are magnified by an optical element.
The application further provides a vehicle comprising the HUD system shown in any one of the embodiments, wherein the HUD system projects the imaged first image and second image to a windshield of the vehicle, and reflects the imaged first image and second image by the windshield for receiving by human eyes. It should be noted that the information presented by the first image and the second image is different. For example, the first image is used to display meter information of the vehicle to reflect the state of the vehicle to the driver, and the second image is used to display navigation information to reflect the current road condition to the driver.
It should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (15)
1. A heads-up display (HUD) system, comprising: an image generation unit PGU and at least one optical element;
the PGU comprises a light source, an image display module, an image modulation module and a controller;
the light source is used for emitting light beams to the image display module;
the controller is used for loading first image information and second image information to the image display module and loading a first modulation signal and a second modulation signal to the image modulation module;
the image display module is used for generating a first image corresponding to the first image information according to the light beam, generating a second image corresponding to the second image information according to the light beam, and projecting the first image and the second image to the image modulation module;
the image modulation module is configured to modulate the first image according to the first modulation signal, modulate the second image according to the second modulation signal, and project the modulated first image and second image to the optical element;
the at least one optical element is used for imaging the modulated first image and the modulated second image and guiding the imaged first image and the imaged second image to an imaging area, wherein the imaged first image and the imaged second image have different imaging positions.
2. The HUD system of claim 1,
the controller is specifically configured to load the first image information to a first area of the image display module, load the second image information to a second area of the image display module, load the first modulation signal to the first area of the image modulation module, and load the second modulation signal to the second area of the image modulation module.
3. The HUD system of claim 1,
the controller is specifically configured to load the first image information to the image display module at a first time period, load the second image information to the image display module at a second time period, load the first modulation signal to the image modulation module at the first time period, and load the second modulation signal to the image modulation module at the second time period.
4. The HUD system according to any one of claims 1 to 3, wherein the image modulation module is a Liquid Crystal On Silicon (LCOS), the first modulation signal includes first phase information and first grating information, and the second modulation signal includes second phase information and second grating information.
5. The HUD system of any one of claims 1-3, wherein the image modulation module is a liquid lens, the first modulation signal is a first voltage, and the second modulation signal is a second voltage.
6. The HUD system of any one of claims 1-5, further comprising a first diffuser screen and a second diffuser screen;
the image modulation module is configured to project the modulated first image to the first diffusion screen, and project the modulated second image to the second diffusion screen;
the first diffusion screen is used for diffusing the modulated first image and guiding the diffused first image to the optical element;
the second diffusion screen is used for diffusing the modulated second image and guiding the diffused second image to the optical element.
7. A HUD system according to any of claims 1 to 6 wherein the optical elements are transmissive or reflective elements;
the optical element is further used for amplifying the modulated first image and the modulated second image.
8. An image display method applied to a head-up display (HUD) system, wherein the HUD system comprises an image generation unit (PGU) and an optical element, wherein the PGU comprises a light source, an image display module, an image modulation module and a controller; the method comprises the following steps:
setting the light source to emit light beams to the image display module;
the controller is set to load first image information and second image information to the image display module, and load a first modulation signal and a second modulation signal to the image modulation module;
setting the image display module to generate a first image corresponding to the first image information according to the light beam, generating a second image corresponding to the second image information according to the light beam, and projecting the first image and the second image to the image modulation module;
setting the image modulation module to modulate the first image according to the first modulation signal, modulate the second image according to the second modulation signal, and project the modulated first image and second image to the optical element;
and arranging the optical element to image the modulated first image and the modulated second image, and guiding the imaged first image and the imaged second image to an imaging area, wherein the imaged first image and the imaged second image have different imaging positions.
9. The method of claim 8, further comprising:
and setting the controller to load the first image information on a first area of the image display module, load the second image information on a second area of the image display module, load the first modulation signal on the first area of the image modulation module, and load the second modulation signal on the second area of the image modulation module.
10. The method of claim 8, further comprising:
the controller is configured to load the first image information to the image display module in a first time period, load the second image information to the image display module in a second time period, load the first modulation signal to the image modulation module in the first time period, and load the second modulation signal to the image modulation module in the second time period.
11. The method according to any of claims 8 to 10, wherein the image modulation module is a Liquid Crystal On Silicon (LCOS), the first modulation signal comprises first phase information and first grating information, and the second modulation signal comprises second phase information and second grating information.
12. The method of any of claims 8 to 10, wherein the image modulation module is a liquid lens, the first modulation signal is a first voltage, and the second modulation signal is a second voltage.
13. The method according to any of claims 8 to 12 wherein the HUD system further comprises a first diffuser screen and a second diffuser screen; the method further comprises the following steps:
the image modulation module is arranged to project the modulated first image to the first diffusion screen and project the modulated second image to the second diffusion screen;
arranging the first diffusion to diffuse the modulated first image and to direct the diffused first image to the optical element;
the second diffuser screen is configured to diffuse the modulated second image and direct the diffused second image to the optical element.
14. The method according to any one of claims 8 to 12, wherein the optical element is a transmissive element or a reflective element; the method further comprises the following steps:
and amplifying the modulated first image and the second image through the optical element.
15. A vehicle comprising a HUD system according to any of claims 1 to 7, said HUD system projecting the imaged first and second images onto a windshield of the vehicle and reflecting the imaged first and second images by the windshield for receipt by a human eye.
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| CN116931263A (en) * | 2022-03-30 | 2023-10-24 | 华为技术有限公司 | Head-up display device, head-up display method and vehicle |
| CN116931265A (en) * | 2022-04-01 | 2023-10-24 | 华为技术有限公司 | Image generation device, display equipment and vehicle |
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