Grating and design method therefor, brightness adjustment method, component, apparatus and vehicle

Abstract

A grating design method, comprising: dividing a grating of an image generation component into a first grating region and a second grating region (S31); adjusting optical parameters of the first grating region until the imaging light energy of the first grating region satisfies a first preset condition (S32); and adjusting optical parameters of the second grating region according to the adjusted optical parameters of the first grating region (S33).

Description

Grating, design method thereof, brightness adjustment method, assembly, device and carrier

[0001] The present application claims priority to the Chinese patent application No. 202411239535.4, filed on September 5, 2024, to the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of display technology, for example to a grating, a design method thereof, a brightness adjustment method, an assembly, a device and a carrier. BACKGROUND

[0003] Naked eye 3D (three-dimensional stereoscopic display) technology refers to that a user can directly observe a 3D image through naked eyes without wearing special 3D glasses, and the principle is to attach a grating on a projected display panel to achieve light splitting, so that the left eye and the right eye of the user observe different images.

[0004] However, this way is easy to cause the images observed by the left and right eyes of the user to have differences in brightness, and thus the 3D effect cannot be fused. SUMMARY

[0005] The present application provides a design method of a grating, applied to an image generation assembly, and the design method comprises:

[0006] dividing the grating of the image generation assembly into a first grating region and a second grating region;

[0007] adjusting the optical parameters of the first grating region until the light energy of the imaging of the first grating region meets a first preset condition;

[0008] adjusting the optical parameters of the second grating region according to the adjusted optical parameters of the first grating region.

[0009] In one embodiment, the first preset condition comprises that the distribution range of the light energy of the imaging of the first grating region is within a first distribution range, and the brightness in the distribution range of the light energy of the imaging of the first grating region is greater than a first brightness threshold.

[0010] In one embodiment, adjusting the optical parameters of the second grating region according to the adjusted optical parameters of the first grating region comprises

[0011] adjusting the optical parameters of the second grating region according to the adjusted optical parameters of the first grating region until the light energy of the imaging of the second grating region meets a second preset condition.

[0012] In an embodiment, the second preset condition comprises that a difference between the brightness of the imaging of the second grating region and the imaging of the first grating region at the same position is less than a second brightness threshold, or a distribution range of the light energy of the second grating region is the same as a distribution range of the light energy of the first grating region.

[0013] In an embodiment, the first grating region comprises at least one first sub-grating, the second grating region comprises at least one second sub-grating, and the optical parameter comprises a face type radius of the grating.

[0014] In an embodiment, the dividing the grating of the image generating component into the first grating region and the second grating region comprises:

[0015] The grating is evenly divided into the first grating region and the second grating region according to an area of the image generating component;

[0016] The areas of the first grating region and the second grating region are iterated under the condition that the optical parameters of the grating of the first grating region and the second grating region remain unchanged, until the light energy of the first grating region and the light energy of the second grating region satisfy a third preset condition.

[0017] In an embodiment, the third preset condition comprises that a distribution range of the light energy of the imaging of the first grating region is greater than a second distribution range.

[0018] Embodiments of the present application provide a brightness adjustment method, applied to an image generating component, a grating of the image generating component is determined according to the design method of the grating of any one of the embodiments.

[0019] The brightness adjustment method comprises:

[0020] obtaining a first brightness and a second brightness, the first brightness being the brightness of the imaging of the first grating region, and the second brightness being the brightness of the imaging of the second grating region;

[0021] respectively adjusting the lamp beads corresponding to the first grating region and the lamp beads corresponding to the second grating region until the first brightness and the second brightness satisfy a fourth preset condition.

[0022] Embodiments of the present application provide a grating, the grating is determined according to the design method of the grating of any one of the embodiments.

[0023] In an embodiment, the grating comprises a cylindrical lens grating.

[0024] Embodiments of the present application provide an image generating component, the image generating component comprises a display panel and the grating of any one of the embodiments.

[0025] The grating is arranged opposite to the display panel, and the display panel is provided with lamp beads on a side close to the grating.

[0026] In one embodiment, the first grating region comprises at least one first sub-grating, and one first sub-grating corresponds to at least one lamp bead.

[0027] In one embodiment, when one first sub-grating corresponds to at least two lamp beads, the first sub-grating is configured to reflect light of the at least two lamp beads to different imaging regions for imaging, respectively.

[0028] In one embodiment, the second grating region comprises at least one second sub-grating, and one second sub-grating corresponds to at least one lamp bead.

[0029] In one embodiment, when one second sub-grating corresponds to at least two lamp beads, the second sub-grating is configured to reflect light of the at least two lamp beads to different imaging regions for imaging, respectively.

[0030] In one embodiment, the grating comprises a cylindrical lens grating.

[0031] Embodiments of the present application provide a head-up display device, which comprises an image generation assembly and a reflection assembly.

[0032] Embodiments of the present application provide a vehicle, which comprises a head-up display device and an imaging assembly. BRIEF DESCRIPTION OF DRAWINGS

[0033] FIG. 1 is a schematic diagram of naked-eye 3D provided by embodiments of the present application;

[0034] FIG. 2 is a first structural schematic diagram of an image generation assembly provided by embodiments of the present application;

[0035] FIG. 3 is a flow schematic diagram of a design method of a grating provided by embodiments of the present application;

[0036] FIG. 4 is a second structural schematic diagram of an image generation assembly provided by embodiments of the present application;

[0037] FIG. 5 is a schematic diagram of a light spot of imaging of a first grating region provided by embodiments of the present application;

[0038] FIGS. 6A-6B are schematic diagrams of light energy ratio of a first grating region and a second grating region before adjustment of the grating provided by embodiments of the present application;

[0039] FIG. 7 is a schematic diagram of light energy ratio of a first grating region and a second grating region after adjustment of the grating provided by embodiments of the present application;

[0040] FIG. 8 is a structural schematic diagram of an image generation assembly before adjustment of the grating provided by embodiments of the present application;

[0041] FIG. 9 is a structural schematic diagram of an image generation assembly after adjustment of the grating provided by embodiments of the present application;

[0042] FIG. 10 is a flow diagram of a brightness adjustment method according to an embodiment of the present application;

[0043] FIG. 11 is a structural diagram of a Micro-LED display panel according to an embodiment of the present application;

[0044] FIG. 12 is a diagram of displaying left and right eye images by an image generation component according to an embodiment of the present application;

[0045] FIG. 13 is a diagram of images observed by a user's left and right eyes according to an embodiment of the present application;

[0046] FIG. 14 is a structural diagram of a head-up display device according to an embodiment of the present application;

[0047] FIG. 15 is a structural diagram of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0048] The terms "first", "second", and the like in the description and in the claims of the present application and in the above-described drawings mean for distinguishing similar objects, not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the present application described herein are capable of operation in other sequences than described or illustrated herein. Furthermore, the terms "comprise", "comprising", "include", "including", and the like are intended to cover non-exclusive inclusions, such that a process, method, system, product, or apparatus that comprises a list of steps or units are not necessarily limited to those steps or units which are expressly listed, but can include other steps or units not expressly listed or inherent to such process, method, system, product, or apparatus.

[0049] Before the present embodiments are described, the following terms are explained:

[0050] A head-up display (HUD) is a driving assistance instrument applied in a vehicle, which is a comprehensive electronic display device composed of electronic components, display components, controllers, and the like. The head-up display can project vehicle speed, navigation information, and warning information in the form of images and characters to the front of a driver through optical components.

[0051] The naked eye three-dimensional (3D) display, as shown in FIG. 1, makes the user see the imaging P1 on the left eye 11 and the imaging P2 on the right eye 12 through the optical design of the imaging assembly. The binocular parallax between the imaging P1 and the imaging P2 makes the user see the object with depth and spatial sense. The imaging seen by the left eye 11 and the right eye 12 is synthesized into a stereoscopic picture with depth in the user's brain. By changing the positional relationship between the two images, the binocular parallax is adjusted, so that the user subjectively feels that the imaging distance has changed (in fact, the imaging distance is unchanged). The closer the two images are, the closer the user subjectively feels the imaging distance. Conversely, the farther the two images are, the farther the user subjectively feels the imaging distance.

[0052] Micro light emitting diode display (Micro LED / MLED) converts LED into red, green and blue colors through quantum dot technology, and periodically arranges the LED array at equal intervals to realize the direct display effect of the Micro-LED screen.

[0053] In the naked eye 3D display, the first condition for the fusion of the 3D effect of the image is that the images displayed on the left eye and the right eye have a certain parallax and the brightness between the two images is close, so as to generate 3D stereoscopic effect in the brain through comparison and processing.

[0054] However, during the propagation of light in the HUD for naked eye 3D display, due to the influence of the propagation path of the HUD system on the light, the brightness difference between the images observed by the left and right eyes of the user when viewing the imaging may occur, that is, the problem of non-uniformity, which cannot fuse the 3D effect.

[0055] For the above problem, the brightness adjustment of the lamp beads of the MLED can be improved, but this will put too high a requirement on the corresponding algorithm, and the demand for the brightness distribution range of the lamp beads is also wider. This undoubtedly puts greater challenges on the manufacturing and selection of the MLED, and the higher the demand for the performance of the lamp beads is, the higher the cost will be, which will become an obstacle for the use of MLED on the HUD.

[0056] Therefore, based on this, the embodiment of the present application provides a design method of a grating, which is applied to an image generation assembly. Optionally, the method can be executed by a processor in an electronic device.

[0057] The image generating component is one of the key components in the HUD, which is used to supply sufficient and uniformly distributed light source to generate image light to be displayed. After the reflection of the reflection component, the image light to be displayed is displayed on the corresponding imaging component to display the image to be displayed. The image generating component in the embodiment can adopt the combination of MLED and grating, or other structures, which are not particularly limited here.

[0058] For example, referring to FIG. 2, in the image generating component, the light is generally split by pasting the grating 22 on the MLED 21 to generate the image P1 seen by the left eye and the image P2 seen by the right eye on the imaging component, as shown in FIG. 1. The light rays of adjacent lamp beads are refracted by the grating, and the exit angles are different. After the refraction of the reflection component and the imaging component (for example, the windshield of the vehicle), the light rays enter the left eye and the right eye of the user, respectively. The left eye and the right eye of the user see different images, and the light is split.

[0059] Referring to FIG. 3, the design method of the grating includes:

[0060] S31, the grating of the image generating component is divided into a first grating region and a second grating region.

[0061] The first grating region and the second grating region can be divided according to the grating area, the brightness requirement of imaging, and the like. In the embodiment, the first grating region can be the central region of the grating, and the second grating region can be the edge region of the grating.

[0062] Generally, the imaging of the central region of the grating is better than that of the edge region of the grating in uniformity. In imaging, the brightness of the central region of the grating is closer, and the brightness difference of the edge region is larger. Therefore, the purpose of dividing the grating into the first grating region and the second grating region is to optimize the characteristics of different grating regions.

[0063] In addition, if the first grating region is the central region of the grating, and the second grating region is the edge region of the grating, the number of the second grating region is at least one. The more the number of the second grating region, the higher the adjustment accuracy of the edge region of the grating.

[0064] S32, the optical parameters of the first grating region are adjusted until the light energy of the imaging of the first grating region meets a first preset condition.

[0065] The light energy of the imaging represents the energy distribution of the light at different imaging positions, which can be used to describe how the brightness (illuminance) of the light is distributed in different distribution ranges. The light energy in the embodiment includes the following two related parameters: the distribution range of the light energy and the brightness at different imaging positions.

[0066] The optical parameters include, but are not limited to, the sag of the grating, the height of the grating, the refractive index of the grating, the width of the grating, and the number of pixels covered by the grating. The optical parameters can be the sag of the grating, but are not limited thereto, and can be selected according to actual needs. It should be noted that the optical parameters of the first grating area can be obtained by reading the design file of the grating of the image generating assembly.

[0067] Taking the sag of the grating as an example, how the optical parameters change the energy of the imaged light is described as follows:

[0068] Referring to FIG. 4, the grating 22 is composed of a large number of micro columnar lenses. When the light passes through the grating 22, due to the different sags of each columnar lens, the refraction angle and the propagation direction of the light will also change. That is, when the sag of the grating 22 is large, the exit angle of the light after refraction is large, which causes the light to be more widely dispersed in space, and the energy distribution is relatively wide. When the sag is small, the exit angle of the light after refraction is small, which causes the light to be more concentrated, and the energy distribution is relatively narrow. Therefore, by adjusting the sag of the grating 22, the refraction angle of the light can be controlled, thereby affecting the energy distribution range of the light in space.

[0069] Therefore, in order to meet the uniformity requirement of the first grating area when imaging, the optical parameters of the first grating area need to be adjusted until the energy of the imaged light of the first grating area meets the first preset condition.

[0070] For example, the first preset condition includes that the distribution range of the energy of the imaged light of the first grating area is within a first distribution range, and the brightness of the energy of the imaged light of the first grating area in the distribution range is greater than a first brightness threshold.

[0071] The threshold of the first distribution range can correspond to the eyebox distribution range of the user, and the first brightness threshold can correspond to the brightness of the imaged light that can be observed by the user.

[0072] Generally, the energy of the imaged light is related to the power of the lamp bead, and the power of the lamp bead is fixed, so that the energy of the light is also generally fixed. During imaging, since the energy of the imaged light is reflected by the brightness and the distribution range, and the total energy of the light is fixed, the brightness and the distribution range are negatively correlated. That is, the more concentrated the distribution range of the energy of the light is, the higher the brightness of the light is. The more dispersed the distribution range of the energy of the light is, the lower the brightness of the light is.

[0073] In addition, the distribution range of the light energy in the embodiment can refer to a distribution range in which the brightness of the imaged light energy is greater than the first brightness threshold. In the embodiment, the distribution range of the light energy can be a distribution range in which the brightness is greater than the first brightness threshold. In the case where the brightness is greater than the first brightness threshold, the wider the distribution range of the light energy, the better the uniformity of the imaging in the corresponding distribution range. FIG. 5 is a schematic diagram of the imaged light spots of the first grating region. The middle region is a light spot within the distribution range of the imaged light energy of the first grating region, and the two side regions are light spots outside the distribution range of the imaged light energy of the first grating region. The brightness of the middle imaged light spot is the highest, and the brightness of the two side imaged light spots is moderate, and the brightness of the blank region is zero.

[0074] S33, adjusting the optical parameters of the second grating region according to the adjusted optical parameters of the first grating region.

[0075] FIGS. 6A-6B are diagrams of the distribution of the light energy of the first grating region and the second grating region. FIG. 6A is a diagram of the distribution of the light energy of the first grating region, and FIG. 6B is a diagram of the distribution of the light energy of the second grating region. 61 and 62 are two different imaging positions observed by the user, respectively.

[0076] When in the imaging position 62, the brightness of the light energy of the first grating region and the second grating region is the same, and the imaging of the two grating regions can be normally displayed. The user observes a complete image in the imaging position 62.

[0077] When in the imaging position 61, the distribution range of the light energy of the second grating region becomes narrow and the light is distorted. Since the brightness of the light energy of the second grating region becomes dark, the imaged light energy of the second grating region does not meet the expectation. Only the imaging of the first grating region can be normally displayed, and the imaging of the second grating region cannot be normally displayed. The user observes an image with brightness difference in the imaging position 61.

[0078] At this time, when the left-eye image P1 and the right-eye image P2 are displayed in the imaging positions 61 and 62, respectively, in combination with the distribution of the light energy at 61 and 62 in FIGS. 6A-6B, the display of the left-eye and right-eye imaging that cannot be fused to produce a 3D effect occurs. As described above, the user can observe that P2 is a complete image, and P1 is an image with brightness difference. The prerequisite for fusing a 3D effect is that the left eye and the right eye see two images with a certain parallax and close brightness, so as to produce a stereoscopic effect through the processing and comparison of the brain. If one image is very bright and the other image is very dark, the brain is difficult to fuse, thereby affecting the 3D effect.

[0079] Therefore, in step S33, the optical parameter of the second grating region will be adjusted according to the optical parameter of the first grating region, aiming at matching the light energy of the imaging of the second grating region with the light energy of the imaging of the first grating region, referring to FIG. 7, after the adjustment of the optical parameter of the second grating region according to the first grating region, the brightness of the light rays at the same imaging position is the same, whether it is the imaging position 61 or the imaging position 62, at this time, the left eye image P1 is displayed at the imaging position 61, and the right eye image P2 is displayed at the imaging position 62, the imaging at the two positions will be similar and uniform in brightness, and the user can observe the complete imaging, avoiding the problem that the 3D effect cannot be fused due to the brightness difference between the left and right eye images.

[0080] Meanwhile, the embodiment improves the 3D effect of the naked eye 3D display by adjusting the optical parameter of the grating, which is more simple and efficient than the method of adjusting the brightness of the lamp beads to improve the 3D effect of the naked eye 3D display.

[0081] In one embodiment, step S33 specifically includes:

[0082] The optical parameter of the second grating region is adjusted according to the adjusted optical parameter of the first grating region, until the light energy of the imaging of the second grating region meets the second preset condition.

[0083] For example, the second preset condition includes that the difference between the brightness of the imaging of the second grating region and the brightness of the imaging of the first grating region at the same position is less than a second brightness threshold.

[0084] The second brightness threshold can be selected according to actual needs, the smaller the second brightness threshold, the smaller the difference between the brightness of the imaging of the second grating region and the brightness of the imaging of the first grating region at the same position, the closer the brightness of the two grating regions at the same position, and the better the uniformity of the imaging, which can effectively avoid the problem of poor 3D effect caused by insufficient uniformity of the left and right eye images during 3D fusion.

[0085] In addition, the second preset condition can also include that the distribution range of the light energy of the second grating region is the same as the distribution range of the light energy of the first grating region. Based on the above statements, since the total light energy is fixed and the light energy is reflected by two parameters of brightness and distribution range, the distribution range of the light energy of the two is the same, so the brightness at the same position is the same, and the uniformity of the final imaging is better, which can effectively avoid the problem of poor 3D effect caused by insufficient uniformity of the left and right eye images during 3D fusion.

[0086] In one embodiment, the optical parameter includes the face type radius of the grating, which is further described as follows:

[0087] The first grating region comprises at least one first sub-grating, and the second grating region comprises at least one second sub-grating. The number of the first sub-grating and the number of the second sub-grating can be selected according to actual needs.

[0088] For the convenience of understanding, only the case that the first grating region comprises one first sub-grating and the second grating region comprises two second sub-gratings is listed in the embodiment, referring to FIG. 8 and FIG. 9, one first sub-grating 221 corresponds to at least one lamp bead 211, and one second sub-grating 222 corresponds to at least one lamp bead 212. FIG. 8 and FIG. 9 are in the same scale, FIG. 8 is the case of the surface type radius of the grating before adjustment, and FIG. 9 is the case after the surface type radius of the grating is adjusted. As can be seen from the figures, the surface type radius Ra of the two second sub-gratings 222 after adjustment is smaller and close to the surface type radius Rb of the first sub-grating 221.

[0089] In one embodiment, the step S31 specifically comprises:

[0090] The grating is evenly divided into the first grating region and the second grating region according to the area of the image generation component, and the areas of the first grating region and the second grating region are iterated under the condition that the optical parameters of the grating in the first grating region and the second grating region remain unchanged, until the light energy of the first grating region and the light energy of the second grating region satisfy the third preset condition.

[0091] For example, the third preset condition comprises that the distribution range of the imaged light energy of the first grating region is greater than the second distribution range.

[0092] Since the second grating region is usually the edge region of the grating, and the first grating region is usually the center region of the grating, the distortion encountered by the light in the first grating region during propagation is smaller, and the distribution range and brightness of the light energy of the first grating region are less affected, so the uniformity of the imaging of the first grating region is better. In the process of dividing the areas of the first grating region and the second grating region, the areas can be first divided according to the area of the image generation component covered by the grating, then the optical parameters are fixed, and the areas of the first grating region and the second grating region are adjusted under the condition that the optical parameters remain unchanged, until the optical energy of the imaging of the first grating region and the second grating region both satisfy the third preset condition, at which time the uniformity of the imaging of the first grating region and the second grating region can be effectively improved.

[0093] In the embodiment, this avoids fine tuning of the lamp beads, avoids difficulties in algorithms and tests, reduces the difficulty and computing power requirement for the regulation of the image generation component, and at the same time guarantees the uniformity of the imaging and improves the 3D effect.

[0094] The above embodiment is further described through a specific implementation manner.

[0095] By dividing the display panel of the image generating component into three regions, the cylindrical lens grating can also be divided into a first grating region and a second grating region, and the surface radius of the grating in the two regions is respectively R a and R b, which can be seen from FIG. 8.

[0096] The grating in the first grating region is adjusted, the surface radius of the first sub-grating in the first grating region is adjusted to R b, and then the surface radius R a of the second sub-grating in the second grating region is adjusted according to the adjusted surface radius R b, which can be seen from FIG. 9; so that the light energy of the second grating region is consistent with the light energy of the first grating region, which can be seen from FIG. 7.

[0097] In fact, the optical parameters of the grating can usually only be adjusted during production, and it is obviously difficult to adjust the optical parameters of the grating to realize the adjustment of the uniformity of the light intensity when the grating is installed on the image generating component or on the carrier.

[0098] Based on this, the embodiment of the present application provides a brightness adjustment method applied to an image generating component. Optionally, the method can be executed by a processor in an electronic device. The grating of the image generating component is determined according to the design method of the grating in the above embodiment.

[0099] Referring to FIG. 10, the brightness adjustment method comprises the following steps.

[0100] S41, acquiring a first brightness and a second brightness.

[0101] The first brightness is the brightness of the imaging of the first grating region, and the second brightness is the brightness of the imaging of the second grating region. The brightness of the imaging can be the brightness projected on the imaging component, which can be acquired according to the brightness sensor arranged at the imaging component or the user's eyes, but is not limited thereto, and can be selected according to the actual situation.

[0102] S42, respectively adjusting the lamp beads corresponding to the first grating region and the lamp beads corresponding to the second grating region until the first brightness and the second brightness satisfy a fourth preset condition.

[0103] In one embodiment, before step S42, before adjusting the first grating region and the second grating region, the brightness difference between the first brightness and the second brightness can be analyzed first.

[0104] Exemplarily, the analysis method includes but is not limited to any one of the following: first, directly comparing the brightness difference between the first brightness and the second brightness to determine the brightness difference between the two; second, setting a standard brightness, and calculating the brightness difference between the first brightness and the second brightness and the standard brightness to determine the brightness difference between the two.

[0105] In one embodiment, after the luminance difference is determined according to the above manner, the lamp beads corresponding to the first grating area and the lamp beads corresponding to the second grating area can be adjusted according to the luminance difference until the first luminance and the second luminance meet the fourth preset condition.

[0106] The fourth preset condition can be that the first luminance and the second luminance both meet a standard luminance, or that the luminance difference between the first luminance and the second luminance is less than a preset difference value. The standard luminance and the preset difference value can be selected according to actual conditions, and are not limited herein.

[0107] In addition, the first luminance and the second luminance are respectively adjusted according to the adjustment parameters of the corresponding lamp beads. In this embodiment, the adjustment parameters of the lamp beads can be determined by using a luminance adjustment algorithm, and are not particularly limited herein.

[0108] In this embodiment, due to the grating partition design, the number of lamp beads that can cause luminance difference is reduced, that is, there is no need to adjust the lamp beads on the entire image generation component to achieve luminance adjustment, and the adjustment range of the adjustment parameters of a single lamp bead can also be reduced.

[0109] The present application also provides a grating, which is determined according to the design method of the grating in the above embodiment.

[0110] The grating provided in this embodiment can refer to the grating 22 in FIGS. 2 and 4. According to the design method provided in the above embodiment, the optical parameters of the first grating area and the second grating area are designed, the distribution ranges of the light energy of the two are the same, and the luminances of the two at the same position are also the same. The uniformity of the grating provided in this embodiment when imaging is improved, and the 3D fusion effect is effectively improved.

[0111] In one embodiment, the grating includes a cylindrical lens grating, and can also include other gratings, such as a slit grating. However, since the resolution of the cylindrical lens grating is relatively high, the cylindrical lens grating is used in this embodiment.

[0112] The present application provides an image generation component, which is shown in FIG. 2. The image generation component includes a display panel 21 and a grating 22 provided in the above embodiment.

[0113] The grating 22 is arranged opposite to the display panel 21, and the display panel 21 is provided with lamp beads on the side close to the grating 22.

[0114] The grating 22 includes the first grating area and the second grating area in the above embodiment.

[0115] The display panel 21 in the embodiment can adopt a Micro-LED display panel. FIG. 11 is a schematic diagram of the Micro-LED display panel 21. The lamp beads on the display panel are arranged periodically at equal distances in red, green and blue colors, forming a periodic array. The red lamp beads 2101 and the green lamp beads 2102 are provided with quantum dots 2103, light filters 2104 and light blocking pieces 2105 of corresponding colors, and the blue lamp beads 2106 are not additionally processed. The display panel 21 adopts a complementary metal-oxide-semiconductor (CMOS) active matrix backboard 2107, and the active matrix backboard 2107 contains a group of lamp bead driving circuits 2108. The display resolution of the display panel 21 is 640*480, and the lamp bead spacing is 20 μm. Each lamp bead driver is a single current source, the maximum current is 20 μA, and the gray scale is 256. For the Micro-LED display panel, the Micro-LED is used as a lamp bead element and is controlled individually by a silicon driver IC, so that the display panel 21 can present a clear image with high contrast.

[0116] In one embodiment, as shown in FIG. 9, the first grating region includes at least one first sub-grating 221, and one first sub-grating 221 corresponds to at least one lamp bead 211.

[0117] In addition, when one first sub-grating 221 corresponds to at least two lamp beads 211, the first sub-grating 221 is configured to reflect the light of the at least two lamp beads 211 to different imaging areas for imaging, respectively. The imaging process can refer to FIG. 12. In FIG. 12, corresponding image light is generated by the lamp beads 211 on the display panel 221. One first sub-grating 221 covers two lamp beads 211. The image light is reflected to the imaging positions of the left eye and the right eye, respectively, by the action of the grating, so as to be observed by the left eye and the right eye, respectively. The image P1 displayed at the imaging position of the left eye in the embodiment is pure white, and the image P2 displayed at the imaging position of the right eye is black. The images observed by the left eye and the right eye can refer to FIG. 13. The image P1 observed at the imaging position of the left eye is pure white, and the image P2 observed at the imaging position of the right eye is black. In FIG. 13, the pure white is represented by blank, and the black is represented by diagonal fill.

[0118] In one embodiment, as shown in FIG. 9, the second grating region includes at least one second sub-grating 222, and one second sub-grating 222 corresponds to at least one lamp bead 212.

[0119] In addition, when one second sub-grating 222 corresponds to at least two lamp beads 212, the second sub-grating 221 is configured to reflect the light of the at least two lamp beads 212 to different imaging areas for imaging, respectively. The imaging process can refer to the first sub-grating, which is not described herein again.

[0120] The head-up display device according to an embodiment of the present application comprises an image generating assembly 2 and a reflecting assembly 31.

[0121] The image generating assembly 2 is configured to emit image light, and the reflecting assembly 31 is located on an optical path 32 of the image light and configured to reflect the image light to the imaging assembly 4 for imaging.

[0122] For example, the reflecting assembly 31 comprises a first mirror 311 and a second mirror 312. The first mirror 311 is located on the optical path between the image generating assembly 31 and the second mirror 312, and configured to reflect the image light to the second mirror 312. The second mirror 312 is configured to reflect the image light to the imaging assembly 4.

[0123] Finally, the imaging 41 of the image to be displayed is formed on the imaging assembly 4, and a user can observe the corresponding imaging 41 at the corresponding position 42.

[0124] The vehicle according to an embodiment of the present application comprises the head-up display device 3 and the imaging assembly 4.

[0125] The vehicle can be any one of a car, a train, an airplane, etc., and the imaging assembly 4 can be any one of a display screen, a windshield, etc., without particular limitation.

[0126] The head-up display device 3 generates image light of the image to be displayed and emits the image light to the imaging assembly 4, so that the imaging 41 of the image to be displayed is displayed on the imaging assembly 4, and a user can observe the corresponding imaging 41 at the corresponding position 42.

[0127] The grating and the design method, the brightness adjusting method, the assembly, the device and the vehicle provided by the embodiments of the present application have the following technical effects:

[0128] By partitioning the grating of the image generating assembly, adjusting the optical parameters of the cylindrical grating in different regions after the grating is partitioned, adjusting the optical parameters of the first grating region first, so that the light energy of the first grating region meets the first preset condition, and then adjusting the optical parameters of the second grating region, finally making the light energy of the second grating region consistent with the light energy of the first grating region, at this time, the brightness of the first grating region and the second grating region at the same imaging position is close, avoiding the influence of the uneven brightness of the imaging on the fusion 3D effect.

[0129] It should be noted that the above-mentioned embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments. And the above describes a specific embodiment of the present application. 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 in the embodiments and still achieve the desired result. In addition, the processes depicted in the accompanying drawings do not necessarily require the particular order or sequential order shown or described to achieve the desired results. In certain implementations, multi-task processing and parallel processing are possible or can be advantageous.

[0130] 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. A person of ordinary skill in the art can understand that all or part of the above-mentioned steps can be completed by hardware, or by program to instruct relevant hardware, and the program can be stored in a computer readable storage medium, and the above-mentioned storage medium can be read-only memory, disk or optical disk, etc.

Claims

1. A design method of a grating applied to an image generating component, the design method comprising: dividing a grating of the image generating component into a first grating region and a second grating region; adjusting optical parameters of the first grating region until an energy of an imaged light ray of the first grating region meets a first preset condition; and adjusting optical parameters of the second grating region according to the adjusted optical parameters of the first grating region. The first preset condition comprises that a distribution range of the energy of the imaged light ray of the first grating region is within a first distribution range, and a brightness within the distribution range of the energy of the imaged light ray of the first grating region is greater than a first brightness threshold. The adjusting of the optical parameters of the second grating region according to the adjusted optical parameters of the first grating region comprises: adjusting the optical parameters of the second grating region until an energy of an imaged light ray of the second grating region meets a second preset condition. The second preset condition comprises that a difference between a brightness of an image of the second grating region and a brightness of an image of the first grating region at a same position is less than a second brightness threshold, or a distribution range of the energy of the light ray of the second grating region is the same as a distribution range of the energy of the light ray of the first grating region. The first grating region comprises at least one first sub-grating, the second grating region comprises at least one second sub-grating, and the optical parameters comprise a face type radius of the grating. The dividing of the grating of the image generating component into the first grating region and the second grating region comprises: dividing the grating of the image generating component into the first grating region and the second grating region according to an area of the image generating component; and iteratively adjusting the areas of the first grating region and the second grating region while keeping the optical parameters of the grating of the first grating region and the second grating region unchanged until an energy of the first grating region and an energy of the second grating region meet a third preset condition. The third preset condition comprises that a distribution range of the energy of the imaged light ray of the first grating region is greater than a second distribution range. 8.A brightness adjusting method applied to an image generating component, a grating of the image generating component being determined according to the design method of the grating of any one of claims 1-7; the brightness adjusting method comprising: obtaining a first brightness and a second brightness, the first brightness being a brightness of an image of the first grating region, and the second brightness being a brightness of an image of the second grating region; and adjusting a lamp bead corresponding to the first grating region and a lamp bead corresponding to the second grating region respectively until the first brightness and the second brightness meet a fourth preset condition. 9.A grating determined according to the design method of the grating of any one of claims 1-7. The grating comprises a cylindrical lens grating.

2. The method of claim 1, wherein, 11.An image generating component comprising a display panel and the grating of any one of claims 9-10; the grating is arranged opposite to the display panel, and the display panel is provided with a lamp bead on a side close to the grating.

3. The method of claim 1, wherein, ​ ​ 4. The method of claim 3, wherein, ​ 5. The method of claim 1, wherein, ​ 6. The method of claim 1, wherein, ​ ​ ​ 7. The method of claim 6, wherein, ​ ​ ​ ​ ​ ​ 10. The grating of claim 9, wherein, ​ ​ ​ 12. The image generation component of claim 11, wherein, The first grating region comprises at least one first sub-grating, and one first sub-grating corresponds to at least one lamp bead.

13. The image generation component of claim 12, wherein, When the one first sub-grating corresponds to at least two lamp beads, the first sub-grating is configured to reflect light of the at least two lamp beads to different imaging regions for imaging, respectively.

14. The image generation component of claim 11, wherein, The second grating region comprises at least one second sub-grating, and one second sub-grating corresponds to at least one lamp bead.

15. The image generation component of claim 14, wherein, When the one second sub-grating corresponds to at least two lamp beads, the second sub-grating is configured to reflect light of the at least two lamp beads to different imaging regions for imaging, respectively.

16. A head-up display device comprising the image generating assembly and the reflecting assembly according to any one of claims 11-15.

17. A vehicle comprising the head-up display device and the imaging assembly according to claim 16.

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