CN116453475A

CN116453475A - Image generation unit, head-up display device, carrier and light adjustment method

Info

Publication number: CN116453475A
Application number: CN202310454675.2A
Authority: CN
Inventors: 金康; 王云帆; 管晋
Original assignee: Zhejiang Chiyun Technology Co ltd
Current assignee: Zhejiang Chiyun Technology Co ltd
Priority date: 2023-04-23
Filing date: 2023-04-23
Publication date: 2023-07-18

Abstract

The invention relates to an image generating unit, a head-up display device, a carrier and a light adjusting method, wherein the image generating unit comprises a black-and-white liquid crystal screen, a local dimming type backlight module and a light adjusting module; the backlight module comprises a lamp panel, wherein a plurality of light emitting devices are arranged on the lamp panel; the black-and-white display screen comprises a plurality of display areas; the display areas are in one-to-one correspondence with the light emitting devices; the light adjusting module is used for determining a light emitting device to be adjusted from a plurality of light emitting devices according to elements to be displayed in the image to be displayed, and carrying out color adjustment on the light emitting device to be adjusted according to the color information of the elements to be displayed, so that the light emitting device to be adjusted emits light beams with colors corresponding to the color information, and a display area corresponding to the light emitting device to be adjusted is lightened. The image generation unit can remarkably improve resolution, can avoid the problem of chromatic dispersion, and can ensure the definition of final imaging while realizing color imaging.

Description

Image generation unit, head-up display device, carrier and light adjustment method

Technical Field

The disclosure relates to the technical field of display, in particular to an image generating unit, a head-up display device, a carrier and a light adjusting method.

Background

An image generating unit (Picture Generation Unit, PGU) is used as a core component for generating an image in a Head Up Display (HUD), and its imaging performance directly affects the product performance of the HUD. In some HUD products today, PGUs are mainly implemented based on these several technologies: liquid crystal display (Liquid Crystal Display, LCD), digital light processing (Digital Light Processing, DLP), liquid crystal on silicon (Liquid Crystal On Silicon, LCOS), laser beam scanning (Laser Beam Scanning, LBS). The four PGUs have respective advantages and disadvantages in performance, cost, volume and the like, and the LCD with the most mature technology at present is widely applied to the technical field of head-up display due to low cost.

In the related art, a HUD product based on an LCD mostly adopts a color LCD to realize color imaging, a color LCD structure is provided with color filters including three color filters of red, green and blue, as shown in fig. 1, the color filters are represented as three sub-pixels in a lateral direction, and the three sub-pixels form one pixel, so that any pixel can be mixed to form a desired color by adjusting different transmittance of the three color filters of red, green and blue based on a three-primary color mixing principle; however, due to the way three sub-pixels are arranged laterally and the three sub-pixels need to be adjusted in combination, the resolution of the image in the lateral direction is at least three times compressed, resulting in poor final viewing effect; and when realizing 3D HUD based on color LCD, also can lead to its separation in the lateral direction because of the transverse arrangement mode of three sub-pixels for the incident angle, the emergence angle of three sub-pixels entering the lenticular lens grating are different, take place the chromatic dispersion easily, and the people's eye can produce colored edge on the image that sees in the eye box scope, finally leads to appearing 3D effect relatively poor.

Disclosure of Invention

The disclosure provides an image generating unit, a head-up display device, a carrier and a light adjusting method, and the technical scheme of the disclosure is as follows:

according to a first aspect of embodiments of the present disclosure, an image generating unit is provided and applied to a head-up display device, where the image generating unit includes a black-and-white liquid crystal screen, a local dimming type backlight module, and a light adjusting module; the black-and-white liquid crystal screen and the backlight module are arranged in a stacked mode;

the backlight module comprises a lamp panel, wherein a plurality of light emitting devices are arranged on the lamp panel; the black-and-white display screen comprises a plurality of display areas; the display areas are in one-to-one correspondence with the light emitting devices; each of the plurality of display areas covers at least one pixel;

the light adjusting module is used for determining a light emitting device to be adjusted from a plurality of light emitting devices according to elements to be displayed in the image to be displayed, and carrying out color adjustment on the light emitting device to be adjusted according to the color information of the elements to be displayed, so that the light emitting device to be adjusted emits light beams with colors corresponding to the color information, and a display area corresponding to the light emitting device to be adjusted is lightened.

In some possible embodiments, the backlight module further includes a lens panel disposed opposite to the lamp panel;

a plurality of collimating lenses are arranged on one side of the lens panel, facing the lamp panel, and correspond to the light emitting devices one by one.

In some possible embodiments, the backlight module further includes a concave lens disposed on a side of the lens panel away from the lamp panel;

the light beam emitted by each light emitting device in the plurality of light emitting devices is reflected to the concave lens through the collimating lens corresponding to each light emitting device, and is refracted through the concave lens to form a divergent light beam.

In some possible embodiments, a lenticular grating is also included;

the cylindrical lens grating is arranged on one side of the black-and-white liquid crystal screen, which is far away from the backlight module.

In some possible embodiments, the lenticular includes a plurality of lenticular lenses arranged in a lateral direction;

the width of each of the plurality of lenticular lenses in the lateral direction is the sum of the widths of two or more pixels in the lateral direction.

According to a second aspect of embodiments of the present disclosure, there is provided a head-up display device including the image generating unit and the mirror assembly of the first aspect of embodiments of the present disclosure;

and the reflecting mirror assembly reflects the light rays emitted by the image generating unit to the imaging assembly, and forms a virtual image through reflection of the imaging assembly.

According to a third aspect of embodiments of the present disclosure, there is provided a vehicle comprising the heads-up display device and the imaging assembly of the second aspect of embodiments of the present disclosure.

According to a fourth aspect of embodiments of the present disclosure, there is provided a light adjustment method, which is applied to the image generating unit of the first aspect of embodiments of the present disclosure, where the image generating unit includes a black-and-white liquid crystal screen, a locally dimming type backlight module, and a light adjustment module; the black-and-white liquid crystal screen and the backlight module are arranged in a stacked mode; the backlight module comprises a lamp panel, wherein a plurality of light emitting devices are arranged on the lamp panel; the black-and-white display screen comprises a plurality of display areas; the display areas are in one-to-one correspondence with the light emitting devices; the method comprises the following steps:

determining a light emitting device to be adjusted from a plurality of light emitting devices according to elements to be displayed in an image to be displayed;

and carrying out color adjustment on the light emitting device to be adjusted according to the color information of the element to be displayed, so that the light emitting device to be adjusted emits light beams with colors corresponding to the color information, and the display area corresponding to the light emitting device to be adjusted is lightened.

In some possible embodiments, determining a light emitting device to be adjusted from a plurality of light emitting devices according to a element to be displayed in an image to be displayed includes:

acquiring the display proportion between an image to be displayed and a black-and-white liquid crystal screen;

acquiring pixel positions of elements to be displayed in an image to be displayed;

determining a target display area from the plurality of display areas according to the pixel position and the display scale;

and determining a light emitting device corresponding to the target display area from the plurality of light emitting devices as the light emitting device to be adjusted.

In some possible embodiments, when the number of elements to be displayed is a plurality, the method further comprises:

when at least part of pixel positions corresponding to any two elements to be displayed are identical, setting the color information of the two elements to be displayed to be identical.

In some possible embodiments, the method further comprises:

when the boundaries of the pixel positions corresponding to any two elements to be displayed are adjacent, setting the color information of one element to be displayed in the two elements to be displayed as black or gray.

The technical scheme provided by the embodiment of the disclosure at least brings the following beneficial effects:

the image generating unit of the embodiment of the disclosure carries out backlight adjustment on the backlight module through the light adjusting module, so that the backlight module emits light beams and lights a black-and-white liquid crystal screen; on the one hand, as the black-and-white liquid crystal screen is adopted, the black-and-white liquid crystal screen is not provided with the optical filters of three colors of red, green and blue, each pixel in the black-and-white liquid crystal screen can independently adjust the transmittance, and when the 3D imaging is realized, the black-and-white liquid crystal screen can split light by a single pixel, so that compared with an image generating unit based on the color liquid crystal screen in the related art, the resolution can be obviously improved, and the problem of chromatic dispersion can be avoided; on the other hand, the backlight module is set through the light adjusting module according to the color information of the element to be displayed, so that color imaging can be realized, and the definition of final imaging can be ensured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure and do not constitute an undue limitation on the disclosure.

FIG. 1 is a schematic illustration of one prior art provided by an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a frame of an image generating unit provided in an embodiment of the present disclosure;

fig. 3 is a schematic structural view of an image generating unit provided in an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of backlight adjustment provided by an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a backlight module according to an embodiment of the disclosure;

fig. 6 is a schematic cross-sectional structure of an image generating unit provided in an embodiment of the present disclosure;

FIG. 7 is a schematic illustration of a speckle phenomenon provided by embodiments of the present disclosure;

FIG. 8 is a graph showing a comparison of display effects provided by embodiments of the present disclosure;

FIG. 9 is a block diagram of a head-up display device provided by an embodiment of the present disclosure;

fig. 10 is an application environment schematic diagram of a head-up display device according to an embodiment of the present disclosure;

FIG. 11 is a flow chart of a light adjustment method provided by an embodiment of the present disclosure;

FIG. 12 is a flow chart of determining a light emitting device to be adjusted provided by an embodiment of the present disclosure;

fig. 13 is a schematic diagram of a black-and-white lcd display interface according to an embodiment of the present disclosure;

fig. 14 is a schematic view of a positional arrangement of a plurality of light emitting devices provided in an embodiment of the present disclosure;

the following supplementary explanation is given to the accompanying drawings:

1-black-and-white liquid crystal screen; 11-a display area; 111-pixels; 2-a backlight module; 21-a lamp panel; 22-a light emitting device; 23-a lens panel; 24-a collimating lens; 25-concave lens; 3-a light adjusting module; 4-a lenticular grating; 41-a lenticular lens; 5-plane mirrors; 6-curved mirror.

Detailed Description

In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings.

It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the foregoing figures are used for distinguishing between similar first objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the disclosure described herein may be capable of operation in sequences other than those illustrated or described herein. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

In the related art, the PGU product based on the LCD has a problem of low display resolution, and therefore, the embodiments of the present disclosure first provide an image generating unit, which can improve the display resolution of the image generating unit. Specific embodiments of the image generation unit are described below.

As shown in fig. 2, fig. 2 is a schematic frame diagram of an image generating unit according to an embodiment of the present disclosure, where the image generating unit includes a black-and-white liquid crystal screen 1, a locally dimming backlight module 2, and a light adjusting module 3; in the embodiment of the disclosure, the image generating unit is applied to a head-up display device, and the image generating unit carries out backlight adjustment on the backlight module 2 through the light adjusting module 3, so that the backlight module 2 emits light beams and lights the black-and-white liquid crystal screen 1;

as shown in fig. 3, fig. 3 is a schematic structural diagram of an image generating unit according to an embodiment of the present disclosure, where a black-and-white liquid crystal screen 1 and a backlight module 2 are stacked; the backlight module 2 comprises a lamp panel 21, and a plurality of light emitting devices 22 are arranged on the lamp panel 21; a lens panel 23 is arranged on one side of the lamp panel 21, which is close to the black-and-white liquid crystal screen 1, and a lens with a light converging function is arranged on the lens panel 23 and is used for collimating light rays emitted by the light emitting device 22; the black-and-white display screen 1 includes a plurality of display areas 11; the plurality of display areas 11 are in one-to-one correspondence with the plurality of light emitting devices 22; the black-and-white liquid crystal panel 1 includes a plurality of pixels 111; each display area 11 of the plurality of display areas 11 covers at least one pixel 111; it should be noted that, the number of pixels 111 covered by the display area 11 in fig. 3, and the correspondence between the display area 11 and the light emitting device 22 are only examples, and are determined according to specific requirements in practical applications;

in the embodiment of the disclosure, the light-emitting device 22 in the backlight module 2 is color-adjusted by the light-adjusting module 3, so that the light-emitting device 22 emits a colored light beam to the black-and-white liquid crystal screen 1, and the display area 11 corresponding to the light-emitting device 22 is lightened, so that the image generating unit can display a color image. Specifically, the light adjustment module 3 determines a light emitting device to be adjusted (exemplary, the light emitting device 22 shown in gray in the lower left and lower right in fig. 3) from among the plurality of light emitting devices 22 according to the element to be displayed in the image to be displayed; then, the light adjusting module 3 performs color adjustment on the light emitting device to be adjusted according to the color information of the element to be displayed, so that the light emitting device to be adjusted emits a light beam with a color corresponding to the color information of the element to be displayed, and the display area corresponding to the light emitting device to be adjusted is lightened (for example, the gray light emitting device 22 at the lower left corner in fig. 3 is lightened to the display area 11 shown at the upper left and lower corners of the black-white liquid crystal screen).

In the embodiment of the disclosure, since the black-and-white liquid crystal screen 1 is adopted, the black-and-white liquid crystal screen 1 is not provided with filters of three colors of red, green and blue, so that each pixel 111 in the black-and-white liquid crystal screen 1 can independently adjust the transmittance, where the pixel 111 is equivalent to a sub-pixel (R pixel or G pixel or B pixel) shown in fig. 1; therefore, compared with the image generating unit based on the color liquid crystal screen in the related art, which needs 3 sub-pixels to be combined for adjustment when adjusting pixels, the image generating unit based on the black-and-white liquid crystal screen in the embodiment of the disclosure can adjust each sub-pixel independently, so that the transverse resolution is changed to be 3 times of the original resolution; for example, if a color lcd with a lateral resolution of 1280 is used, under the condition that the number of pixels is not changed, 3840 sub-pixels that can be independently adjusted are provided in the lateral direction of the lcd with a black screen, so that the lateral resolution can be significantly improved.

In the embodiment of the disclosure, the backlight module 2 is a backlight module based on a Local dimming technology (Local dimming), that is, the backlight module 2 can realize Local backlight adjustment. When the backlight module 2 performs local dimming, any position and any number of light emitting devices 22 can be combined, each combination forms a backlight small area, each backlight small area can independently control backlight brightness and color, and different backlight small areas can be adjusted to different backlight brightness and colors; specifically, the brightness and color of the different areas of the image to be displayed can be adjusted according to the brightness and color of the different areas, as shown in fig. 4, when the image to be displayed needs to display bright-colored pictures, the corresponding backlight small areas can improve the brightness and the color definition, and when the image to be displayed needs to display dark-colored pictures, the corresponding backlight small areas can reduce the brightness and the color definition, and even are closed, so that the optimal contrast and the optimal picture effect can be achieved.

In some possible embodiments, as shown in fig. 5, fig. 5 is a schematic structural diagram of a backlight module provided in the embodiments of the disclosure, and the backlight module 2 may further include a lens panel 23, where the lens panel 23 is disposed opposite to the lamp panel 21; the lens panel 23 is provided with a plurality of collimating lenses 24 on a side facing the lamp panel 21, and the collimating lenses 24 are in one-to-one correspondence with the light emitting devices 22. Specifically, each light emitting device 22 disposed on the lamp panel 21 may be configured to emit white light or light with a specific color, and the light beam emitted by each light emitting device 22 may be collimated by the corresponding collimating lens 24 to obtain a collimated light beam.

In a further possible embodiment, the backlight module 2 may further include a concave lens 25, where the concave lens 25 is disposed on a side of the lens panel 23 away from the lamp panel 21; the light beam emitted by each light emitting device 22 of the plurality of light emitting devices 22 is reflected to the concave lens 25 by the collimating lens 24 corresponding to each light emitting device 22, and is refracted by the concave lens 25 to form a divergent light beam.

Specifically, after the light beam emitted by each light emitting device 22 on the lamp panel 21 is collimated by the corresponding collimating lens 24, the collimated light beam passes through the lens panel 23 and then enters the concave lens 25, and as the concave lens 25 has a divergent function on the light, the collimated light beam can change the original light beam propagation direction after being refracted by the concave lens 25, so as to form a light beam diverged towards the edge of the concave lens 25; fig. 5 illustrates two light emitting devices 22 located at the edge of the lamp panel 21, and as can be seen from fig. 5, the light emitted by the final backlight module 2 may have a certain divergence angle, and then may be subsequently incident to the black-and-white liquid crystal screen 1 at the divergence angle, so that the image light emitted by the black-and-white liquid crystal screen 1 also has the light emitting angle, thereby meeting the requirement of HUD optical design.

In some possible embodiments, the image generating unit of the embodiments of the present disclosure may also be applied to a HUD that achieves a 3D effect, so, as shown in fig. 6, fig. 6 is a schematic cross-sectional structure of an image generating unit provided by the embodiments of the present disclosure; the image generation unit may further comprise a lenticular lens 4; the cylindrical lens grating 4 is arranged on one side of the black-and-white liquid crystal screen 1 far away from the backlight module 2.

Specifically, through setting up lenticular lens 4 in the side that black and white LCD screen 1 kept away from backlight unit 2, can make through lenticular lens 4 carry out the light splitting to the image light that black and white LCD screen 1 was launched, make image light after the reflection of other parts of HUD, the left eye of final part light entering people, partial light gets into the right eye of people, the image that left eye and right eye of people see like this is the image that has the parallax, the content of these two images is the same at least in part, make the image that left eye and right eye see have the stereoscopic picture of depth sense at user's brain synthesis a pair, and then the object that the user sees has depth sense and space sense, realize the effect of stereoscopic display like this. In other embodiments of the present disclosure, in addition to the lenticular lens 4, the image may be split by other light splitting structures such as a slit grating.

In some possible embodiments, as shown in fig. 6, the lenticular lens 4 includes a plurality of lenticular lenses 41, the plurality of lenticular lenses 41 being arranged in the lateral direction; the width of each of the plurality of lenticular lenses 41 in the lateral direction is the sum of the widths of two or more pixels 111 in the lateral direction.

In a specific embodiment, for the case where the eye box is divided into left and right areas, the width of each lenticular lens 41 in the lateral direction is the sum of the widths of the two pixels 111 in the lateral direction; in this way, the light rays emitted from two laterally adjacent pixels 111 have different emitting directions, one pixel 111 displays part of the content of the left eye image, and the other pixel 111 displays part of the content of the right eye image, so that the image light rays displayed by a plurality of pixels 111 in the black-and-white liquid crystal screen 1 are respectively input into the left area and the right area of the eye box after being split, and thus the images with parallax seen by the left eye and the right eye of the user are combined into a pair of stereoscopic pictures with depth sense in the brain of the user, and the stereoscopic display effect is provided for the user. In the case of the eye box shown in fig. 6 including three areas e1, e2 and e3, each lenticular lens 41 should cover three pixels 111, i.e., the width of each lenticular lens 41 in the lateral direction is the sum of the widths of three pixels 111 in the lateral direction.

In the related art, as shown in fig. 1, when a lenticular lens is arranged on a color liquid crystal screen to realize a 3D effect, the following technical problems exist: when the eye box comprises three areas e1, e2 and e3 and one grating width covers 3 sub-pixels with integral multiple number, as the three sub-pixels of RGB are transversely arranged and the corresponding positions of the three sub-pixels of RGB on the cylindrical lens grating are different, the incidence angle and refraction angle of light of the three sub-pixels are different, and the propagation direction is also different; when the three RGB sub-pixels are mixed at a sufficient distance in the same direction, the human eye perceives the light as white light, but when the propagation direction is deflected, the three sub-pixels are separated, so that the three sub-pixels finally open to the same eye box area and are all R/G/B, i.e. each sub-partition is an independent R/G/B, for example: r1, R2, R3 are incident into e1, G2, G3 are incident into e2, and B1, B2, B3 are incident into e3, which results in the failure to achieve white color, and the occurrence of chromatic dispersion, i.e., the occurrence of color edges on the display image viewed by the human eye in the range of the eye box.

In the embodiment of the disclosure, the black-and-white liquid crystal screen 1 is used to replace a color liquid crystal screen, so that light can be split by taking a single sub-pixel (namely the pixel 111) as a unit, and light split by the same cylindrical lens from different pixels 111 can strike different areas of an eye box, so that the situation of chromatic dispersion can not occur; in addition, the black-and-white liquid crystal panel has no color filter, and although each pixel 111 does not have the ability to impart color, the transmittance is higher, and the gradation value is changed by adjusting the transmittance of each pixel 111, thereby generating an image; further, the color is given by the backlight module 2, and the color is transmitted through the black-and-white liquid crystal panel 1, thereby realizing a colored image.

In addition, when the local dimming is adopted as a backlight module in the related technology, the problem of unclear image edges is easily caused; specifically, as shown in fig. 7 (a) and (b), the area covered by the light emitted by each light emitting device 22 on the LCD panel exceeds the corresponding effective area (i.e., the display area 11) of each light emitting device on the LCD panel, and the exceeding area is also colored with the light beam emitted by the light emitting device, and the exceeding area is called a speckle area, which not only causes the adjacent display area to be easy to cross color, but also causes the boundary of the whole LCD panel to be unclear.

In the embodiment of the disclosure, the black-and-white liquid crystal screen 1 is adopted for displaying, so that the black-and-white liquid crystal screen 1 can provide a clear boundary for an image; specifically, under the combined action of the crystal lattice in the liquid crystal screen and the black matrix structure in the optical filter, a black frame which only allows the light beam which is projected to the effective area to pass through can be formed, so that the light beam beyond the black frame part can not pass through, the problem of speckle can be weakened, and the problems of speckle and unclear image caused by the fact that the illumination area of the light-emitting device in the Local dimming backlight module is larger than the corresponding effective display area on the LCD are solved; furthermore, the light adjusting module 3 is used for carrying out special configuration according to the colors of the elements to be displayed in the image to be displayed, so that the juncture of different elements can be ensured to be still clear. The final display effect after improvement is shown in fig. 8, the left side in fig. 8 is the imaging of the PGU in the prior art, the boundary of the display image is relatively burnt, the overall effect image is not clear, the right side in fig. 8 is the imaging of the backlight module and the black-and-white liquid crystal screen adopting Local dimming in the embodiment of the disclosure, the image edge is clear, and the overall effect is clear.

In summary, in the image generating unit provided in the embodiments of the present disclosure, on one hand, the local dimming type backlight module 2 is used as a backlight, so that the contrast of a picture can be improved, and more accurate color expressions such as brightness, contrast, color and the like can be obtained; on the other hand, when the black-and-white liquid crystal screen 1 is used for displaying, and the lenticular lens is used for carrying out light splitting on the image light of the black-and-white liquid crystal screen 1 to realize the 3D imaging effect, as the black-and-white liquid crystal screen 1 has no color filter relative to the color liquid crystal screen, each pixel 111 in the black-and-white liquid crystal screen 1 has only on-off action (which can be understood that if one pixel is conducted, the sub-pixel transmits the backlight light beam at the corresponding position to the lenticular lens, otherwise, if one pixel is not conducted, the backlight light beam at the corresponding position of the sub-pixel cannot transmit, and thus cannot enter the lenticular lens), so that the light splitting can be carried out by a single sub-pixel (namely the pixel 111), thereby obviously improving the resolution and avoiding the problem of chromatic dispersion easily generated based on the color liquid crystal screen. The image generation unit of the embodiment of the disclosure can obviously improve imaging performance on the premise of not improving cost.

Next, the embodiment of the present disclosure further provides a head-up display device, as shown in fig. 9, fig. 9 is a block diagram of the head-up display device provided by the embodiment of the present disclosure, where the head-up display device includes an image generating unit and a mirror assembly 02; wherein the image generation unit refers to any one of the possible embodiments above; and the reflecting mirror assembly is used for reflecting the light rays emitted by the image generating unit to the imaging assembly and forming a virtual image through reflection of the imaging assembly.

The head-up display device of the embodiment of the disclosure can be applied to an automobile as a driving auxiliary instrument. As shown in fig. 10, fig. 10 is a schematic view of an application environment of a head-up display device according to an embodiment of the present disclosure, where the imaging assembly may be a windshield and the mirror assembly may include a planar mirror 5 and a curved mirror 6 when the head-up display device is applied to an automobile; the head-up display device may be capable of generating an image from information such as vehicle speed, navigation information, warning, etc. by the image generating unit, and projecting the image to the front of the driver via the planar mirror 5, the curved mirror 6, and the windshield in this order, thereby forming a virtual image immediately in front of the driver's line of sight.

It should be noted that the foregoing embodiments only provide one possible number and kind of reflecting mirrors in the reflecting mirror assembly, and in practical applications, the reflecting mirror assembly may include one or more reflecting mirrors of the same or different kinds, depending on the designed reflecting light path.

Secondly, the embodiment of the disclosure also provides a carrier, which comprises the head-up display device and the imaging assembly in the embodiment.

In some possible embodiments, the vehicle may include, but is not limited to, land vehicles such as automobiles, air vehicles such as aircraft (otherwise known as aircraft), or water or underwater vehicles.

Secondly, the embodiment of the disclosure also provides a light adjusting method, which is applied to an image generating unit in a head-up display device, wherein the image generating unit refers to any one of the possible embodiments; further, the image generation unit further includes a processor and a storage medium for storing instructions executable by the processor; the light adjusting method of the embodiment of the present disclosure may be accomplished by a computer program for instructing relevant hardware in the image generating unit, the computer program being stored in the storage medium, the instructions in the storage medium being loaded by the processor and performing the following steps as shown in fig. 11:

s1101: and determining the light emitting device to be adjusted from the plurality of light emitting devices according to the element to be displayed in the image to be displayed.

In the embodiment of the disclosure, the light adjusting method can be applied to a light adjusting module in the image generating unit to realize light adjustment of each light emitting device on the light panel in the backlight module. Firstly, a light adjusting module determines elements to be displayed in an image to be displayed, wherein the image to be displayed and the elements to be displayed are matched with an actual application scene; for example, the application scene is an automobile, the image to be displayed may be the image shown in fig. 8, and correspondingly, the element to be displayed may include, but is not limited to, a vehicle speed, a lane departure warning prompt, a collision warning prompt, and the like. Secondly, the light adjusting module determines a light emitting device to be adjusted from a plurality of light emitting devices according to the element to be displayed, wherein the light emitting device to be adjusted is used for being adjusted to present the element to be displayed.

In some possible embodiments, the determining the light emitting device to be adjusted from the plurality of light emitting devices according to the element to be displayed in the image to be displayed may include the following steps as shown in fig. 12:

s1201: and acquiring the display proportion between the image to be displayed and the black-and-white liquid crystal screen.

Specifically, the light adjusting module firstly obtains the display proportion between the image to be displayed and the black-and-white liquid crystal screen, wherein the display proportion can comprise the transverse resolution proportion and the longitudinal resolution proportion between the image to be displayed and the black-and-white liquid crystal screen; for example, the resolution of the image to be displayed is 1920×1080, the resolution of the black-and-white liquid crystal screen is 1280×720, and the ratio of the horizontal resolution to the vertical resolution between the image to be displayed and the black-and-white liquid crystal screen can be calculated to be 1.5, and the ratio of the vertical resolution to the horizontal resolution to the vertical resolution to be 1.5.

S1203: and acquiring the pixel positions of the elements to be displayed in the image to be displayed.

In general, the element to be displayed covers a plurality of pixels, and thus the number of pixel positions of the element to be displayed in the image to be displayed may be one or any other number. When the number of the pixel positions is one, the pixel position of the element to be displayed can be the pixel position at the central position in the plurality of pixels covered by the element to be displayed, and also can be the pixel position at the boundary position in the plurality of pixels; when the number of pixels is unknown as other number, a required number of pixel positions can be selected from a plurality of pixels according to actual requirements. Wherein the pixel locations include a lateral pixel location and a longitudinal pixel location.

S1205: the target display area is determined from the plurality of display areas according to the pixel position and the display scale.

In this step, the target display area represents a display area of the element to be displayed on the black-and-white liquid crystal screen, and the target display area includes at least one display area 11, and the at least one display area 11 may be connected or disconnected. The light adjusting module determines the display position of the element to be displayed on the black-and-white liquid crystal screen according to the pixel position and the display proportion of the element to be displayed in the image to be displayed, and then determines the target display area from the display areas according to the display position.

Specifically, the light adjusting module can divide the horizontal pixel position of the element to be displayed in the image to be displayed by the horizontal resolution to obtain the horizontal display position of the element to be displayed on the black-and-white liquid crystal screen; dividing the longitudinal pixel position of the element to be displayed in the image to be displayed by the longitudinal resolution to obtain the longitudinal display position of the element to be displayed on the black-and-white liquid crystal screen; and then the light adjusting module determines at least one display area of the element to be displayed according to the horizontal display position and the vertical display position of the element to be displayed.

As shown in fig. 13, fig. 13 is a schematic view of a black-and-white lcd display interface provided in an embodiment of the disclosure, where the black-and-white lcd 1 includes 24 display areas in total of four rows and six columns; it is assumed that the elements to be displayed include a lane departure warning cue (for warning that a currently driving lane is at risk of departure from the current lane) and a collision warning cue, wherein the target display area of the lane departure warning cue includes R22, R32, R24, R34, and the target display area of the collision warning cue includes R22 and R23.

S1207: and determining a light emitting device corresponding to the target display area from the plurality of light emitting devices as the light emitting device to be adjusted.

Specifically, since the light emitting devices are in one-to-one correspondence with the display areas, the light adjusting module may determine the light emitting device corresponding to the target display area among the plurality of light emitting devices as the light emitting device to be adjusted.

For example, corresponding to the black-and-white lcd display interface shown in fig. 13, the light emitting devices are arranged in four rows and six columns as shown in fig. 14; correspondingly, the corresponding light emitting devices of the lane departure warning prompt are L22, L32, L24 and L34, the corresponding light emitting devices of the collision early warning prompt are L22 and L23.

S1103: and carrying out color adjustment on the light emitting device to be adjusted according to the color information of the element to be displayed, so that the light emitting device to be adjusted emits light beams with colors corresponding to the color information, and the display area corresponding to the light emitting device to be adjusted is lightened.

In the step, after determining the light emitting device to be adjusted, the light adjusting module adjusts the color of the light emitting device to be adjusted according to the color information of the element to be displayed, so that the light emitting device to be adjusted emits a light beam with the color corresponding to the color information, and then the display area corresponding to the light emitting device to be adjusted is lightened.

As shown in fig. 13 and 14, when the color information of the lane departure warning prompt is red, the light adjusting module can perform color adjustment on the four light emitting devices L22, L32, L24 and L34, so that the four light emitting devices emit red light, and four areas R22, R32, R24 and R34 on the black-and-white liquid crystal screen can be lightened and present red.

In some possible embodiments, when the number of elements to be displayed is a plurality, the light adjusting method of the embodiments of the present disclosure may further include the steps of: when at least part of pixel positions corresponding to any two elements to be displayed are identical, setting the color information of the two elements to be displayed to be identical.

Specifically, since the same light emitting device can display only one color, if the same display area (e.g., R22 in fig. 13) involves two elements to be displayed, the color information of the two elements to be displayed can be set to the same color.

In summary, the light adjustment method of the embodiment of the present disclosure may be used in an image generating unit to implement light adjustment for each light emitting device on a light panel in a backlight module; further, by performing special configuration on color information of the elements to be displayed, it can be ensured that the junction of different elements to be displayed is still clear.

It should be noted that, in the present disclosure, the image generating unit embodiment, the head up display device embodiment, the carrier embodiment, and the light adjusting method embodiment are based on the same application concept.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. The image generation unit is characterized by being applied to a head-up display device and comprising a black-and-white liquid crystal screen (1), a local dimming type backlight module (2) and a light adjusting module (3); the black-and-white liquid crystal screen (1) and the backlight module (2) are arranged in a stacked mode;

the backlight module (2) comprises a lamp panel (21), and a plurality of light emitting devices (22) are arranged on the lamp panel (21); the black and white display screen comprises a plurality of display areas (11); the display areas (11) are in one-to-one correspondence with the light emitting devices (22); -each display area (11) of said plurality of display areas (11) covers at least one pixel (111);

the lamplight adjusting module (3) is used for determining an to-be-adjusted light emitting device (22) from the plurality of light emitting devices (22) according to-be-displayed elements in an image to be displayed, and performing color adjustment on the to-be-adjusted light emitting device (22) according to color information of the to-be-displayed elements, so that the to-be-adjusted light emitting device (22) emits light beams with colors corresponding to the color information, and a display area (11) corresponding to the to-be-adjusted light emitting device (22) is lightened.

2. The image generation unit according to claim 1, wherein the backlight module (2) further comprises a lens panel (23), the lens panel (23) being disposed opposite the lamp panel (21);

a plurality of collimating lenses (24) are arranged on one side, facing the lamp panel (21), of the lens panel (23), and the collimating lenses (24) are in one-to-one correspondence with the light emitting devices (22).

3. The image generation unit according to claim 2, wherein the backlight module (2) further comprises a concave lens (25), the concave lens (25) being provided at a side of the lens panel (23) remote from the lamp panel (21);

the light beam emitted by each light emitting device (22) in the plurality of light emitting devices (22) is reflected to the concave lens (25) through the collimating lens (24) corresponding to each light emitting device (22), and is refracted through the concave lens (25) to form a divergent light beam.

4. The image generation unit of claim 1, further comprising a lenticular lens;

the cylindrical lens grating (4) is arranged on one side of the black-and-white liquid crystal screen (1) far away from the backlight module (2).

5. The image generation unit according to claim 4, wherein the lenticular lens (4) includes a plurality of lenticular lenses (41), the plurality of lenticular lenses (41) being arranged in a lateral direction;

the width of each lenticular lens (41) in the lateral direction of the plurality of lenticular lenses (41) is the sum of the widths of two or more pixels (111) in the lateral direction.

6. A head-up display device comprising the image generation unit according to any one of claims 1 to 5 and a mirror assembly;

the reflecting mirror assembly reflects the light rays emitted by the image generating unit to the imaging assembly, and a virtual image is formed through reflection of the imaging assembly.

7. A vehicle comprising the heads-up display device of claim 6 and the imaging assembly.

8. A light adjusting method, characterized in that the light adjusting method is applied to the image generating unit of any one of claims 1 to 5, wherein the image generating unit comprises a black-and-white liquid crystal screen (1), a local dimming type backlight module (2) and a light adjusting module (3); the black-and-white liquid crystal screen (1) and the backlight module (2) are arranged in a stacked mode; the backlight module (2) comprises a lamp panel (21), and a plurality of light emitting devices (22) are arranged on the lamp panel (21); the black and white display screen comprises a plurality of display areas (11); the display areas (11) are in one-to-one correspondence with the light emitting devices (22); the method comprises the following steps:

determining a light emitting device (22) to be adjusted from the plurality of light emitting devices (22) according to elements to be displayed in an image to be displayed;

and carrying out color adjustment on the light emitting device (22) to be adjusted according to the color information of the element to be displayed, so that the light emitting device (22) to be adjusted emits light beams with colors corresponding to the color information, and the display area (11) corresponding to the light emitting device (22) to be adjusted is lightened.

9. A light-regulating method according to claim 8, wherein said determining a light-emitting device (22) to be regulated from said plurality of light-emitting devices (22) according to a element to be displayed in an image to be displayed comprises:

acquiring the display proportion between the image to be displayed and the black-and-white liquid crystal screen (1);

acquiring the pixel (111) position of the element to be displayed in the image to be displayed;

determining a target display area (11) from the plurality of display areas (11) according to the pixel (111) position and the display scale;

-determining a light emitting device (22) of the plurality of light emitting devices (22) corresponding to the target display area (11) as the light emitting device (22) to be adjusted.

10. A light regulating method as defined in claim 9, wherein when the number of elements to be displayed is plural, the method further comprises:

and setting the color information of any two elements to be displayed to be the same when at least part of the positions of the pixels (111) corresponding to the two elements to be displayed are the same.