Image generation assembly, head-up display device, and carrier

Abstract

An image generation assembly (5), a head-up display device (9), and a carrier (14). The image generation assembly (5) comprises: a backlight module (51), an image panel (52), and a first light splitting member (53) which are stacked; the image panel (52) is arranged on a light exit side of the backlight module (51), and the first light splitting member (53) is arranged on the side of the image panel (52) distant from the backlight module (51); a first image region (521) and a second image region (522) are distributed on the image panel (52), the first image region (521) is an image region on which first display processing needs to be performed, and the first light splitting member (53) correspondingly covers the first image region (521).

Description

Image generation assembly, head-up display device and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202421532211.5, filed on June 28, 2024, to the Chinese Patent Office, the whole content of the above application being incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of display technology, for example to an image generation assembly, a head-up display device and a vehicle. BACKGROUND

[0003] Naked eye three-dimensional (3D) display refers to a 3D display technology that presents a 3D effect without the need for users to wear special 3D glasses and directly watch three-dimensional images with naked eyes. The naked eye 3D display technology performs light splitting by attaching a light splitting component such as a grating on an image panel to realize the presentation of two perspective images of left and right eyes, so that users can see the corresponding content in their eyes. However, light splitting by the light splitting component affects the imaging quality. SUMMARY

[0004] In order to solve the problem that the light splitting component affects the imaging quality in the related art, the present application provides an image generation assembly, a head-up display device and a vehicle.

[0005] In a first aspect, an embodiment of the present application provides an image generation assembly, comprising: a backlight module, an image panel and a first light splitting component which are stacked; the image panel is arranged on the light exit side of the backlight module, and the first light splitting component is arranged on the side of the image panel away from the backlight module; the image panel is distributed with a first image area and a second image area, the first image area is an image area requiring first display processing, and the first light splitting component corresponds to the first image area.

[0006] In an optional embodiment, the second image area is an image area requiring second display processing; the image generation assembly further comprises a second light splitting component corresponding to the second image area.

[0007] In an optional embodiment, the optical parameters of the second light splitting component are different from the optical parameters of the first light splitting component.

[0008] In an optional embodiment, the optical parameters of the first light splitting component are set according to the related parameters of the first display processing; the optical parameters of the second light splitting component are set according to the related parameters of the second display processing.

[0009] In an optional embodiment, the image panel comprises a color liquid crystal screen or a black and white liquid crystal screen.

[0010] In an optional embodiment, the light splitting member comprises a cylindrical grating or a slit grating.

[0011] In a second aspect, the embodiments of the present application provide a head-up display device, comprising: an image generating component and a mirror component; the image generating component is configured to emit image light; the mirror component is located on the light path of the image light and reflects the image light to the imaging component to form a virtual image through the imaging component.

[0012] In an optional embodiment, the mirror component comprises a first mirror and a second mirror; the first mirror is located on the light path between the image generating component and the second mirror and is configured to reflect the image light to the second mirror; the second mirror is configured to reflect the image light to the imaging component.

[0013] In an optional embodiment, the first mirror comprises a plane mirror or a free-form curved mirror.

[0014] In an optional embodiment, the second mirror comprises a free-form curved mirror.

[0015] In a third aspect, the embodiments of the present application provide a carrier, comprising: a head-up display device and an imaging component.

[0016] Through the imaging of the provided image generating component, the first light splitting member is overlaid on the first image area which needs to be processed by the first display processing, the light is split through the first light splitting member, the parallax is formed during imaging to obtain the 3D effect, and the second image area can not be processed, thereby avoiding the problems such as the reduction of the resolution of the second image area caused by the light splitting of the light splitting member, ensuring the clarity and brightness of the second image area, and effectively improving the image quality. BRIEF DESCRIPTION OF DRAWINGS

[0017] FIG. 1 is a schematic diagram of a field of view according to an example embodiment of the present application;

[0018] FIG. 2 is a schematic diagram of a virtual image distance according to an example embodiment of the present application;

[0019] FIG. 3 is a schematic diagram of a HUD projection range according to an example embodiment of the present application;

[0020] FIG. 4 is a schematic diagram of naked-eye 3D according to an example embodiment of the present application;

[0021] FIG. 5 is a structural schematic diagram of an image generating component according to an example embodiment of the present application;

[0022] FIG. 6 is a first structural schematic diagram of an image panel according to an example embodiment of the present application;

[0023] FIG. 7 is a schematic diagram of an image to be displayed according to an example embodiment of the present application;

[0024] FIG. 8 is a second structural schematic diagram of an image panel according to an example embodiment of the present application;

[0025] FIG. 9 is a first structural schematic diagram of a head-up display according to an example embodiment of the present application;

[0026] FIG. 10 is a second structural schematic diagram of a head-up display according to an example embodiment of the present application;

[0027] FIG. 11 is a structural schematic diagram of a vehicle according to an example embodiment of the present application. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. The described embodiments are some or all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0029] The terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units shown in the embodiments of the present application can also include other processes, methods, systems, products and devices that are not clearly listed, or other steps or units inherent to these processes, methods, systems, products or devices.

[0030] Before the embodiments of the present application, the following technical terms are explained:

[0031] The field of view (FOV), see FIG. 1, is the angle formed by the two edges of the maximum range of the object image 10 through the lens 110 of the optical instrument with the lens as the vertex, which is called the field of view, including the horizontal field of view 12 and the vertical field of view 13.

[0032] The horizontal field of view 12, also known as the horizontal field of view (HFOV), is the angle between the connecting line of the midpoint of the left and right vertical edges of the rectangular virtual image and the eye point for the rectangular virtual image.

[0033] The longitudinal field of view 13, also called vertical field of view (VFOV), for a rectangular virtual image, is the angle between the lines connecting the midpoint of the two horizontal edges to the eye point.

[0034] The virtual image distance (VID) 20, as shown in FIG. 2, refers to the distance between the eye position 21 of the user and the projected virtual image 22. In the figure, 23 is the horizontal plane, and 11 is the imaging component, such as a windshield.

[0035] The head-up display (HUD) is a driving aid instrument used in vehicles. It is a comprehensive electronic display device composed of electronic components, display components, controllers, etc. It can project vehicle speed, navigation information, warnings, etc. in the form of images and characters to the front of the driver through optical components.

[0036] The HUD projection range, as shown in FIG. 3, refers to the coverage area of the HUD that can be seen by the user's eye position 21 and the virtual image distance 20 from the eye. It can be calculated by the horizontal field of view 12, the longitudinal field of view 13, and the downward angle.

[0037] Naked-eye 3D, as shown in FIG. 4, is achieved by optical design to make the user see imaging P1 with the left eye 41 and imaging P2 with the right eye 42 on the imaging component. The binocular disparity between imaging P1 and imaging P2 makes the user see the object with depth and spatial sense. The images seen by the left eye 41 and the right eye 42 are synthesized into a stereoscopic picture with depth in the user's brain. By changing the positional relationship between the two images, the binocular disparity is adjusted, and the user's subjective virtual image distance changes (in fact, the virtual image distance does not change). The closer the two images are, the closer the user's subjective virtual image distance is. Conversely, the farther the two images are, the farther the user's subjective virtual image distance is.

[0038] To achieve naked-eye 3D, a light splitting piece or other optical design can be used to change the positional relationship between imaging 1 and imaging 2 on the image panel that generates image light. However, the method of attaching a light splitting piece will affect the resolution of the final virtual image.

[0039] Therefore, an example embodiment of the present application provides an image generation component 5, as shown in FIG. 5, which includes a backlight module 51, an image panel 52, and a first light splitting piece 53 arranged in layers. The image panel 52 is arranged on the light-emitting side 511 of the backlight module 51, and the first light splitting piece 53 is arranged on the side of the image panel 52 away from the backlight module 51.

[0040] The backlight module 51 can provide sufficient and uniform light, and the light passes through the image panel 52 to generate corresponding image light 54. In order to facilitate the light generated by the backlight module 51 to pass through the image panel 52 to generate corresponding image light 54, the image panel 52 can be provided as a color liquid crystal screen or a black and white liquid crystal screen, which can be selected according to actual conditions in the embodiment, and is not particularly limited here.

[0041] As shown in FIG. 6, the image panel 52 is distributed with a first image area 521 (identified by horizontal lines in the figure) and a second image area 522 (blank part in the figure). The first image area 521 is an image area that needs to be processed by the first display processing, and the first light splitting member 53 corresponds to the first image area 521.

[0042] The first display processing in the embodiment can be selected as 3D processing, but is not limited thereto, and can be selected according to actual conditions.

[0043] Taking the first display processing as 3D processing as an example, referring to FIG. 7, for the image to be displayed, usually part of the image area needs to be processed by 3D processing, such as the turning clip head 71, the front collision warning 72, the pedestrian collision warning 73 and the like in the image to be displayed, and other parts of the image area can not be processed by 3D processing, such as the complex image 74, the text 75 and the like in the image to be displayed.

[0044] In one possible implementation, the image area in the image to be displayed that needs to be processed by 3D processing corresponds to the first image area 521 on the image panel 52, and the image area that does not need to be processed by 3D processing corresponds to the second image area 522 on the image panel 52. Therefore, in the image panel 52, the first image area 521 corresponds to the image area in the image to be displayed that needs to be processed by 3D processing, and the first light splitting member 53 is correspondingly overlaid on the first image area 521, so as to realize 3D processing on the virtual image formed by the image to be displayed.

[0045] The first light splitting member 53 includes but is not limited to a cylindrical grating or a slit grating, which can be selected according to actual conditions.

[0046] In a possible implementation, the division of the first image area 521 and the second image area 522 can be performed according to a field of view defined in a virtual image formed by the image to be displayed, for example, the first image area 521 is 13°*4°, and the second image area 522 is 7°*1°, but is not limited thereto. In the process of dividing the two image areas, in order to prevent the image light of the first image area 521 and the image light of the second image area 522 from overlapping in the reflection process and affecting the imaging effect, a gap of 0.5°-1.5° in the longitudinal direction is reserved at the boundary between the first image area 521 and the second image area 522 on the image panel 52.

[0047] In addition, it should be noted that, as for the boundary between the first image area 521 and the second image area 522 reserved on the image panel 52, although the boundary is often displayed in the form of a straight line from the virtual image formed by the image to be displayed, due to the optical distortion in the imaging process from the image generation assembly 5 to the corresponding virtual image position, the boundary is actually set as a curve on the image panel 52 according to the principle of inverse correction of image optical distortion.

[0048] In a possible implementation, imaging is performed by the provided image generation assembly, the first light splitting member 53 is overlaid on the first image area 521 requiring first display processing, and parallax is formed by light splitting during imaging to obtain a 3D effect; and the second image area 522 can not be processed, so as to avoid problems such as resolution reduction of the second image area 522 caused by light splitting of the light splitting member, and ensure the clarity and brightness of the second image area 522, thereby effectively improving the image quality.

[0049] In an embodiment, the second image area 522 can be an image area requiring second display processing, or an image area not requiring second display processing, which can be determined according to the application scenario of the image generation assembly 5.

[0050] For the second image area 522 being an image area not requiring second display processing, no light splitting or other processing is performed on the second image area 522 on the image panel 52.

[0051] For the second image area 522 being an image area requiring second display processing, the image generation assembly 5 further includes a second light splitting member, and the second light splitting member is overlaid on the second image area 522.

[0052] The second display processing is the same as the first display processing, which can be 3D processing, and the second light splitting member is the same as the first light splitting member 53, including a cylindrical lens grating or a slit grating, but is not limited thereto, and can be selected according to the actual application scenario.

[0053] The images in the first image region 521 and the second image region 522 form different virtual images through the imaging light path, respectively, and in some possible application scenarios, the 3D effects required to be presented for the two virtual images are different. Therefore, the required processing means for the first display processing and the second display processing are also different. In a possible implementation, in the setting of the first light splitting component 53 and the second light splitting component 55, the optical parameters of the second light splitting component 55 can be set to be different from the optical parameters of the first light splitting component 53, to obtain different 3D imaging effects.

[0054] In a possible implementation, the optical parameters of the first light splitting component 53 can be set according to the related parameters of the first display processing, and the optical parameters of the second light splitting component 55 can be set according to the related parameters of the second display processing.

[0055] The optical parameters include but are not limited to magnification, diffraction angle, slit quantity, etc., and the related parameters include but are not limited to depth of field range, binocular disparity, resolution, etc., which can be selected according to actual conditions.

[0056] In a possible implementation, by setting the first light splitting component 53 that is adapted to the first display processing for the first image region 521, and setting the second light splitting component that is adapted to the second display processing for the second image region 522, virtual images with different 3D imaging effects are formed. According to the different requirements of the 3D imaging effects for different image regions, the optical parameters of the corresponding light splitting components can be customized, so that the image generation assembly provided in this application has a larger 3D coverage area and depth range.

[0057] An example embodiment of the present application further provides a head-up display device 9, as shown in FIG. 9, which includes an image generation assembly 5 and a mirror assembly 91.

[0058] The image generation assembly 5 is configured to emit image light, the mirror assembly 91 is located on the light path 92 of the image light, and reflects the image light to the imaging assembly 11, and the virtual image is formed through the reflection of the imaging assembly 11.

[0059] In a possible implementation, the mirror assembly 91 includes a first mirror 911 and a second mirror 912. The first mirror 911 is located on the light path between the image generation assembly 5 and the second mirror 912, and is configured to reflect the image light to the second mirror 912. The second mirror 912 is configured to reflect the image light to the imaging assembly 11.

[0060] Finally, the virtual image 111 corresponding to the image to be displayed is formed on the imaging assembly 11, and the user 112 observes the corresponding virtual image 111 at the corresponding position.

[0061] The first mirror comprises a plane mirror or a free-form curved mirror, and the second mirror comprises a free-form curved mirror, but is not limited thereto. Due to the magnification effect of the curved mirror, if the curved mirror is used as the mirror, the image light is magnified, and the final imaging is also magnified to a certain extent.

[0062] In an embodiment, in a case where the second image area 522 of the image panel 5 is an image area requiring second display processing, the image panel 5 includes two image areas performing different display processing respectively. On the one hand, in order to avoid the light emitted by the two image areas interfering with each other in the optical path and affecting the imaging effect. On the other hand, in order to accurately adjust the image light generated by each image area.

[0063] On the basis of the above embodiment, referring to FIG. 10, the first mirror 911 includes a first sub-mirror 9111 and a second sub-mirror 9112, and the first sub-mirror 9111 and the second sub-mirror 9112 are arranged in the same direction and are arranged between the second mirror 912 and the imaging assembly 5. The second mirror 912 includes a third sub-mirror 9121 and a fourth sub-mirror 9122.

[0064] The optical path 92 formed by the image light includes a first optical path 921 and a second optical path 922. The first optical path 921 refers to the image light formed by the first image area 521 passing through the first mirror 911, the third sub-mirror 9121, and the imaging assembly 11, and finally forming a first virtual image 1111 corresponding to the first image area 521. The second optical path 922 refers to the image light formed by the second image area 522 passing through the first mirror 911, the fourth sub-mirror 9122, and the imaging assembly 11, and finally forming a second virtual image 1112 corresponding to the second image area 522.

[0065] In this way, two sets of relatively independent optical paths are formed, which can realize independent control of the 3D effect of different image areas, avoid interference of light in the reflection process, and ensure the imaging effect.

[0066] An example embodiment of the present application provides a vehicle, as shown in FIG. 11, the vehicle 14 includes the head-up display device 9 and the imaging assembly 11 in the above embodiment.

[0067] The vehicle 14 can be any one of a car, a train, an airplane, etc., and the imaging device 11 can be any one of a display screen, a windshield, etc., which is not particularly limited herein.

[0068] The head-up display device 9 generates image light of a to-be-displayed image and emits the image light to the imaging assembly 9 to display a virtual image 111 corresponding to the to-be-displayed image on the imaging assembly 11, and a user 112 can observe the corresponding virtual image 111 at a corresponding position.

[0069] It should be noted that the above-mentioned order of the embodiments of the present application is for description only, and does not represent the advantages and disadvantages of the embodiments. The above-mentioned specific embodiments of the present application are described. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from the order in which they are recited, and still achieve desirable results. In addition, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve the desired results. In certain implementations, multitasking and parallel processing can be advantageous or possible.

[0070] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments.

[0071] The above is the preferred embodiment of the present application, which does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An image generation component, the image generation component comprising: A backlight module, an image panel, and a first beam splitter are stacked together. The image panel is disposed on the light-emitting side of the backlight module, and the first beam splitter is disposed on the side of the image panel away from the backlight module; The image panel has a first image area and a second image area distributed on it. The first image area is the image area that needs to be displayed. The first beam splitter covers the first image area.

2. The image generation component as described in claim 1, wherein, The second image region is the image region that needs to undergo the second display processing; The image generation component further includes a second beam splitter, which covers the second image area.

3. The image generation component as described in claim 2, wherein, The optical parameters of the second beam splitter are different from those of the first beam splitter.

4. The image generation component as described in claim 2 or 3, wherein, The optical parameters of the first beam splitter are set according to the relevant parameters of the first display processing; the optical parameters of the second beam splitter are set according to the relevant parameters of the second display processing.

5. The image generation component as described in claim 1, wherein, The image panel includes a color LCD screen or a monochrome LCD screen.

6. The image generation component as described in any one of claims 1-5, wherein, The beam splitter includes a cylindrical lens grating or a slit grating.

7. A head-up display device, the head-up display device comprising: The mirror assembly and the image generation assembly as described in any one of claims 1-6; The image generation component is configured to emit image light rays; The reflector assembly is located in the optical path of the image light rays and reflects the image light rays to the imaging assembly, whereby the reflection by the imaging assembly forms a virtual image.

8. The head-up display device as claimed in claim 7, wherein, The mirror assembly includes a first mirror and a second mirror; The first reflector is located in the optical path between the image generating component and the second reflector, and is configured to reflect the image light to the second reflector; The second reflector is configured to reflect the image light to the imaging component.

9. The head-up display device as claimed in claim 8, wherein, The first reflecting mirror includes: a plane mirror or a free-form curved surface mirror.

10. The head-up display device as claimed in claim 9, wherein, The second reflector includes a free-form curved mirror.

11. A vehicle comprising: Imaging components and head-up display devices as described in any one of claims 7-10.

Images