Head-up display device, design method thereof and carrier

Abstract

The embodiment of the invention provides a head-up display device, a design method thereof and a carrier, and relates to the technical field of head-up display. The head-up display device provided by the embodiment of the invention comprises an image source used for generating a left eye image light beam and a right eye image light beam; the lenticular grating is located on a propagation path of the left-eye image light beam and the right-eye image light beam and is used for carrying out light splitting projection on the left-eye image light beam and the right-eye image light beam; the lenticular grating comprises at least two lenticular partitions, and each lenticular partition comprises at least two lenticular lenses; the at least two cylindrical lens subareas comprise a first cylindrical lens subarea and a second cylindrical lens subarea, and in the first cylindrical lens subarea and the second cylindrical lens subarea, the shading piece is located in the first cylindrical lens subarea. According to the head-up display device provided by the embodiment of the invention, the crosstalk problem of the head-up display device is relieved, and meanwhile, the problem of resolution reduction caused by light shielding is relieved.

Description

Technical Field

[0001] The present invention relates to the field of head-up display technology, and in particular to a head-up display device and a design method and a carrier thereof. Background Art

[0002] With the popularization of automobiles, they are becoming more and more intelligent. In order to improve driving safety and make drivers focus more on the road, more and more vehicles use head up displays (HUD) instead of instrument panels to display driving information. With the development of head up displays, there are different types of HUDs, among which AR-HUD has been widely used.

[0003] Common AR-HUD uses a special lenticular grating to achieve light splitting, so that the left and right eyes see different images, which are then merged into a 3D effect image in the user's brain. However, this lenticular grating is prone to crosstalk, causing the left and right eye images to cross. Summary of the invention

[0004] The embodiments of the present invention provide a head-up display device and a design method and a carrier thereof, so as to reduce the crosstalk problem and the problem of resolution reduction caused by blocking light.

[0005] On the one hand, an embodiment of the present invention provides a head-up display device comprising:

[0006] An image source, the image source is used to generate a left-eye image beam and a right-eye image beam;

[0007] A cylindrical grating is located on the propagation paths of the left-eye image beam and the right-eye image beam, and is used to split the left-eye image beam and the right-eye image beam for projection; the cylindrical grating includes at least two cylindrical partitions, and the cylindrical partitions include at least two cylindrical lenses;

[0008] The light shielding member is configured such that at least two cylindrical lens partitions include a first cylindrical lens partition and a second cylindrical lens partition. In both the first cylindrical lens partition and the second cylindrical lens partition, the light shielding member is located in the first cylindrical lens partition.

[0009] Optionally, the shading member and the cylindrical lens extend in the same direction.

[0010] Optionally, the light shield is located between the image source and the lenticular grating;

[0011] Alternatively, the light shield is located on the side of the lenticular lens away from the image source.

[0012] Optionally, a plurality of cylindrical lenses are arranged along a first direction;

[0013] The cylindrical lens comprises a central region and an edge region, wherein the geometric center of the cylindrical lens is located in the central region, and along a first direction, the edge region is located at the periphery of the central region;

[0014] The shading element covers the edge area in a direction perpendicular to the plane where the cylindrical grating is located.

[0015] Optionally, in the first column lens sub-area, a plurality of shading elements are arranged periodically.

[0016] Optionally, the edge region includes a first edge region and a second edge region, and in the same cylindrical lens, the first edge region and the second edge region are located on both sides of the central region;

[0017] In the first column mirror partition, the shading member covers the first edge region;

[0018] Alternatively, in the first lenticular subregion, the shading element covers the second edge region.

[0019] Optionally, the edge region includes a first edge region and a second edge region, and in the same cylindrical lens, the first edge region and the second edge region are located on both sides of the central region;

[0020] In the first cylindrical lens sub-area, the same shading element covers the first edge region and the second edge region of adjacent cylindrical lenses.

[0021] Optionally, along the first direction, the first edge region and the second edge region have different widths.

[0022] Optionally, the image source comprises a plurality of sub-pixels;

[0023] Along the first direction, the width of the light shielding member is less than or equal to the width of the sub-pixel.

[0024] Optionally, along the first direction, a width of the cylindrical lens is greater than or equal to 100 μm and less than or equal to 300 μm.

[0025] Optionally, in the first lenticular subarea, along the first direction, the plurality of light shielding members have the same width.

[0026] Optionally, in the first lenticular subarea, there are at least two light shielding members having different widths along the first direction.

[0027] Optionally, a curved reflector is further included, and the curved reflector is located on the propagation paths of the split left-eye image light beam and the right-eye image light beam.

[0028] On the other hand, an embodiment of the present invention provides a vehicle, comprising the head-up display device described in the first aspect, and a windshield.

[0029] On the other hand, an embodiment of the present invention provides a design method for a head-up display device, the head-up display device comprising an image source, a lenticular lens, and a light shielding member; the image source is used to generate a left-eye image beam and a right-eye image beam; the lenticular lens is located on a propagation path of the left-eye image beam and the right-eye image beam, and is used to split and project the left-eye image beam and the right-eye image beam;

[0030] The design method comprises:

[0031] Acquire multiple light crosstalk regions on the cylindrical grating;

[0032] According to the plurality of light crosstalk regions, the lenticular grating is divided into at least two lenticular partitions, the lenticular partitions include at least two cylindrical lenses, and the at least two cylindrical lens partitions include a first lenticular partition and a second lenticular partition; wherein the first lenticular partition includes the light crosstalk region;

[0033] The shading element is arranged in the first column lens partition.

[0034] Optionally, a plurality of cylindrical lenses are arranged along a first direction;

[0035] After obtaining multiple light crosstalk areas on the cylindrical grating, it also includes:

[0036] Obtaining widths of a plurality of light crosstalk regions along a first direction;

[0037] According to the widths of the plurality of light crosstalk regions along the first direction, the widths of the light shielding members corresponding to the light crosstalk regions along the first direction are obtained.

[0038] Optionally, the width of the shading member along the first direction is greater than or equal to the minimum crosstalk area width, and less than or equal to the maximum crosstalk area width;

[0039] The minimum crosstalk area width is the minimum width of the plurality of light crosstalk areas along the first direction, and the maximum crosstalk area width is the maximum width of the plurality of light crosstalk areas along the first direction.

[0040] Optionally, obtaining widths of a plurality of light crosstalk regions along a first direction includes:

[0041] Obtaining the density distribution of stray light in multiple light crosstalk areas;

[0042] According to the density distribution of stray light, the width of the light crosstalk area along the first direction is obtained.

[0043] Optionally, according to the widths of the plurality of light crosstalk regions along the first direction, acquiring the widths of the light shielding members corresponding to the light crosstalk regions along the first direction includes:

[0044] Determining whether the width of the light crosstalk area along the first direction is greater than a threshold;

[0045] When the width of the light crosstalk area along the first direction is greater than a threshold value, the width of the shading element along the first direction is set to the first width; when the width of the light crosstalk area along the first direction is less than or equal to the threshold value, the width of the shading element along the first direction is set to the second width; the first width is greater than the second width.

[0046] Optionally, a plurality of light crosstalk regions on the cylindrical grating are obtained, including:

[0047] Only the light on the receiving surface is retained;

[0048] The light on the receiving surface is traced back to the cylindrical grating to find the distribution of the crosstalk light on the cylindrical grating;

[0049] According to the distribution of the crosstalk light on the cylindrical grating, a plurality of light crosstalk areas on the cylindrical grating are obtained.

[0050] The head-up display device provided by the embodiment of the present invention blocks the light that causes the crosstalk problem by setting a shading member only in the first column mirror partition that outputs the crosstalk light, thereby alleviating the crosstalk problem of the head-up display device; at the same time, because the shading member does not block the second column mirror partition that outputs the normal image, the problem of resolution reduction of the head-up display device due to the blocking of the output light is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a structural schematic diagram of a head-up display device provided by an embodiment of the present invention;

[0052] Figure 2 is a schematic structural diagram of a lenticular grating and a light shielding member provided in an embodiment of the present invention;

[0053] Figure 3 Schematic diagram of another structure of a cylindrical grating and a light shielding member provided by an embodiment of the present invention

[0054] Figure 4 is a schematic structural diagram of a lenticular grating and a light shielding member provided in an embodiment of the present invention;

[0055] Figure 5 is a schematic structural diagram of another head-up display device provided by an embodiment of the present invention;

[0056] Figure 6 is a structural schematic diagram of another head-up display device provided by an embodiment of the present invention;

[0057] Figure 7 is a structural schematic diagram of another head-up display device provided by an embodiment of the present invention;

[0058] Figure 8is a structural schematic diagram of another head-up display device provided by an embodiment of the present invention;

[0059] Fig. 9 is a structural schematic diagram of another head-up display device provided by an embodiment of the present invention;

[0060] Fig.10 is a structural schematic diagram of a carrier provided by an embodiment of the present invention;

[0061] Fig.11 is a flow chart of a design method of a head-up display device provided by an embodiment of the present invention;

[0062] Fig.12 It is a flow chart of another method for designing a head-up display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0063] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0064] Research has found that the crosstalk problem mainly occurs at the arc edge of the cylindrical lens in the cylindrical grating. To eliminate the crosstalk, one approach is to block the arc edge of the cylindrical lens by painting it black. However, this approach not only blocks the crosstalk light, but also blocks the area where no crosstalk occurs, which will cause the resolution of the head-up display device to decrease. Conventional cognition is based on the cylindrical grating commonly used in stereoscopic display devices, which usually blocks the arc edges of all cylindrical lenses by painting them black. Research has found that the head-up display device has a non-uniform effect on imaging, that is, the imaging light path causes the crosstalk to increase in some areas and eliminate in some areas.

[0065] Figure 1 is a schematic diagram of a head-up display device provided by an embodiment of the present invention, with reference to Figure 1 An embodiment of the present invention provides a head-up display device including: an image source 1, a cylindrical grating 2 and a shading member 3. The image source 1 is used to generate a left-eye image beam and a right-eye image beam. The cylindrical grating 2 is located on the propagation path of the left-eye image beam and the right-eye image beam, and the cylindrical grating 2 is used to split the left-eye image beam and the right-eye image beam for projection. The cylindrical grating 2 is a splitting element, which deflects the left-eye image beam and the right-eye image beam in different directions, so as to project the left-eye image beam to the left eye and the right-eye image beam to the right eye. The cylindrical grating 2 includes at least two cylindrical partitions 20, Figure 2is a schematic diagram of the structure of the cylindrical lens grating and the light shielding member provided by an embodiment of the present invention, wherein the first direction x is the arrangement direction of the cylindrical lens, the second direction y is the extension direction of the cylindrical lens, Figure 2 In the embodiment, two lenticular subareas 20 are taken as an example, but the present invention is not limited thereto. In other embodiments, the lenticular grating 2 may also be provided with other numbers of lenticular subareas 20.

[0066] Figure 3 is a schematic diagram of the structure of another cylindrical grating and a light shielding member provided by an embodiment of the present invention. Figure 3 For example, Figure 3 The middle cylindrical grating 2 includes three cylindrical partitions 20. The cylindrical partition 20 includes at least two cylindrical lenses 4. The embodiment of the present invention does not limit the number of cylindrical lenses 4 contained in a cylindrical partition 20. At least two cylindrical lens partitions 20 include a first cylindrical partition 21, a second cylindrical partition 22 and a third cylindrical partition 23. Shading members 3 are provided in the first cylindrical partition 21 and the third cylindrical partition 23, and no shading member 3 is provided in the second cylindrical partition 22. The shading members 3 in the first cylindrical partition 21 and the third cylindrical partition 23 can have the same arrangement or different arrangements. The shading members 3 in the first cylindrical partition 21 and the third cylindrical partition 23 can have the same width or different widths.

[0067] In both the first lenticular partition 21 and the second lenticular partition 22, the shading member 3 is located in the first lenticular partition 21. The shading member 3 is disposed in the first lenticular partition 21 to shield the cylindrical lens 4 in the first lenticular partition 21 and the crosstalk light in the first lenticular partition 21. The shading member 3 is not disposed in the second lenticular partition 22, and the shading member 3 does not shield the cylindrical lens 4 in the second lenticular partition 22. A small amount of crosstalk light may exist in the second lenticular partition 22, or there may be no crosstalk light, so that the shading member 3 does not need to be disposed, and at least the resolution of the second lenticular partition 22 is improved, thereby improving the resolution of the head-up display device.

[0068] Among them, the cylindrical grating 2 includes a plurality of cylindrical lenses 4 arranged periodically in the same direction. However, due to the process limitations of manufacturing the cylindrical lenses 4, there will inevitably be gaps between some adjacent cylindrical lenses 4 in the cylindrical grating 2. The light emitted from the image source 1 is emitted from the gaps between the cylindrical lenses 4, which will cause the images received by the left and right eyes to cross, resulting in crosstalk problems.

[0069] The first cylindrical partition 21 is an area where the crosstalk problem exists, and the second cylindrical partition 22 is an area where there is no crosstalk problem. The first cylindrical partition 21 and the second cylindrical partition 22 can be determined by a reverse tracing method: first, the image output by the head-up display device is received by a receiver, and the position of the crosstalk light in the image received by the receiver is determined, and then according to the position of the crosstalk light, the corresponding distribution of these crosstalk lights output on the cylindrical grating 2 surface is obtained by reverse tracing the light path, and the area where these crosstalk lights are output on the cylindrical grating 2 surface is the first cylindrical partition 21. It can be understood that in the first cylindrical partition 21, there are positions where crosstalk lights exist, and there are also positions where crosstalk lights do not exist.

[0070] By setting a shading member 3 in the first cylindrical partition 21 to block the light output by the first cylindrical partition 21, the light that may cause crosstalk problems can be reduced or even eliminated. The reason for setting the shading member 3 only in the first cylindrical partition 21 is that if the shading member 3 is also set in the second cylindrical partition 22 where there is no or little crosstalk problem, the light-transmitting part of the cylindrical lens 4 will be reduced, thereby reducing the resolution of the head-up display device and affecting the imaging quality. However, if the shading member 3 is only set in the first cylindrical partition 21 to accurately block the light that causes crosstalk without affecting the light-transmitting area of ​​the cylindrical lens 4 of the second cylindrical partition 22, it is possible to eliminate the crosstalk problem while reducing the impact on the resolution of the head-up display device and improving the quality of the image output by the head-up display.

[0071] The head-up display device provided by the embodiment of the present invention blocks the light that causes the crosstalk problem by setting a shading member 3 only in the first column mirror partition 21 that outputs the crosstalk light, thereby alleviating the crosstalk problem of the head-up display device; at the same time, because the shading member 3 does not block the second column mirror partition 22 that outputs the normal image, the problem of resolution reduction of the head-up display device due to the blocking of the output light is reduced.

[0072] Figure 4 is a schematic diagram of the structure of the cylindrical grating and the shading element provided in an embodiment of the present invention, with reference to Figure 4 , the shading member 3 has the same extension direction as the cylindrical lens 4. The cylindrical grating 2 includes a plurality of cylindrical lenses 4 arranged periodically along the same direction, and the extension direction of the cylindrical lenses 4 is perpendicular to the periodic arrangement direction of the cylindrical lenses 4. Therefore, the direction of the gaps between the cylindrical lenses 4 is consistent with the extension direction of the cylindrical lenses 4. In order to block the crosstalk light emitted from the gaps between the cylindrical lenses 4 in the first cylindrical partition 21, the shading member 3 also needs to be arranged along the extension direction of the cylindrical lenses 4 to block the crosstalk light. It should be noted that the gaps between the cylindrical lenses 4 are caused by the manufacturing process. For the design stage before manufacturing, there are no gaps between the cylindrical lenses 4. In some embodiments, the extension directions of the shading member 3 and the cylindrical lenses 4 may be different, and there is a smaller angle.

[0073] Optionally, refer to Figure 1 , the light shielding member 3 is located on the side of the lenticular lens 2 away from the image source 1. In the manufacturing process, for example, the lenticular lens 2 can be attached to the substrate ( Figure 1 After that, a black coating layer is filled on the upper surface of the lenticular grating 2. The black coating layer includes a light shielding member 3.

[0074] Figure 5 is a schematic diagram of the structure of another head-up display device provided by an embodiment of the present invention. Figure 5 As shown, the light shielding member 3 is located between the image source 1 and the lenticular lens 2. This setting position can also play a role in shielding crosstalk light. The specific setting position of the light shielding member 3 can be selected according to the needs of actual applications. In the manufacturing process, for example, the black coating layer is first bonded to the substrate 300, and then the lenticular lens 2 is aligned and bonded on the black coating layer (i.e., the light shielding member 3).

[0075] Figure 6 is a schematic diagram of the structure of another head-up display device provided by an embodiment of the present invention, referring to Figure 6 , a plurality of cylindrical lenses 4 are arranged along a first direction x. The cylindrical lenses 4 include a central region 41 and an edge region 40, and the geometric center of the cylindrical lenses 4 is located in the central region 41. Along the first direction x, the edge region 40 is located at the periphery of the central region 41. The shading member 3 covers the edge region 40 of the cylindrical lenses 4 in a direction perpendicular to the plane where the cylindrical grating 2 is located.

[0076] refer to Figure 6 , a plurality of cylindrical lenses 4 are arranged along the first direction x, and the edge regions 40 of the cylindrical lenses 4 are butted together. There may be a gap between the edge regions 40 of two adjacent cylindrical lenses 4. The light passing through the gap may cause crosstalk problems. Therefore, the shading member 3 needs to cover the edge region 40 of the first cylindrical lens partition to block the crosstalk light. At the same time, since the light emitted by the image source 1 enters the cylindrical grating 2 in a direction perpendicular to the plane where the cylindrical grating 2 is located, and is emitted in a direction perpendicular to the plane where the cylindrical grating 2 is located, the shading member 3 needs to cover the edge region 40 in a direction perpendicular to the plane where the cylindrical grating 2 is located. , In terms of manufacturing process, when attaching the cylindrical grating 2 to the substrate ( Figure 6 After that, the upper surface of the lenticular lens 2 is filled with a filling layer 50, and a black layer (ie, a light shielding member 3) is applied to the surface of the filling layer 50 away from the lenticular lens 2.

[0077] Optionally, in the first column lens sub-area, a plurality of shading elements are arranged periodically.

[0078] refer to Figure 6In the cylindrical grating 2, multiple cylindrical lenses 4 are periodically arranged along the first direction x. In the first cylindrical partition, there are gaps between the cylindrical lenses 4. Since the cylindrical lenses 4 are periodically arranged along the first direction x, the gaps between the cylindrical lenses 4 are also periodically distributed. Therefore, as long as the shading element 3 is set according to the distribution period of the gaps between the cylindrical lenses 4, the shading element 3 can block the crosstalk light that passes through the gaps between the cylindrical lenses 4.

[0079] On the basis of the above embodiment, optionally, the edge region 40 includes a first edge region 42 and a second edge region 43, and in the same cylindrical lens 4, the first edge region 42 and the second edge region 43 are located on both sides of the central region 41; in the first cylindrical lens partition, the shading member 3 covers the first edge region 42; or, in the first cylindrical lens partition, the shading member 3 covers the second edge region 43. Optionally, the edge region 40 includes a first edge region 42 and a second edge region 43, and in the same cylindrical lens 4, the first edge region 42 and the second edge region 43 are located on both sides of the central region 41; in the first cylindrical lens partition, the same shading member 3 covers the first edge region 42 and the second edge region 43 of adjacent cylindrical lenses 4. Optionally, along the first direction x, the first edge region 42 and the second edge region 43 have different widths.

[0080] Figure 7 is a structural schematic diagram of another head-up display device provided by an embodiment of the present invention, Figure 8 is a structural schematic diagram of another head-up display device provided by an embodiment of the present invention, Fig. 9 is a schematic diagram of the structure of another head-up display device provided by an embodiment of the present invention, combined with Figure 7 , Figure 8 and Fig. 9 As shown, the shading member 3 may only cover the first edge region 42, or only cover the second edge region 43, and the shading member 3 may also simultaneously cover the first edge region 42 and the second edge region 43 of the adjacent cylindrical lens 4. This embodiment does not impose specific restrictions on the covering position of the shading member 3 and the sizes of the first edge region 42 and the second edge region 43.

[0081] On the basis of the above embodiment, the image source 1 includes a plurality of sub-pixels; along the first direction x, the width of the shading member 3 is less than or equal to the width of the sub-pixel. If the width of the shading member 3 in the first direction x exceeds the width of the sub-pixel, the shading member 3 will completely block the light emitted by some sub-pixels of the image source 1, thereby causing some pixels of the image seen by the user to be lost, and the resolution of the image will be reduced. Therefore, in order to ensure the quality of the image output by the head-up display device, the width of the shading member 3 along the first direction x should not exceed the width of the sub-pixel.

[0082] On the basis of the above embodiment, along the first direction x, the width of the cylindrical lens 4 is greater than or equal to 100 μm and less than or equal to 300 μm.

[0083] Optionally, in the first lenticular partition, along the first direction x, the plurality of shading members 3 have the same width. The design and manufacturing difficulty of shading members 3 of the same width are relatively low, and using shading members 3 of the same width in the first lenticular partition can reduce the design cost and manufacturing difficulty while alleviating the crosstalk problem.

[0084] Optionally, in the first cylindrical lens partition, there are at least two shading members 3 with different widths along the first direction x. The width of the shading member 3 along the first direction x can be flexibly set according to the width of the gap between the corresponding adjacent cylindrical lenses 4. For the gaps between the cylindrical lenses 4 with different widths along the first direction x, shading members 3 with different widths in the first direction x can be set to reduce the influence of the shading member 3 on the resolution of the head-up display device.

[0085] On the basis of the above embodiment, the head-up display device further includes a curved reflector, which is located on the propagation path of the split left-eye image light beam and the right-eye image light beam.

[0086] The curved reflector can reflect the split left eye image beam and the right eye image beam to the windshield of the vehicle, and the windshield can reflect the left eye image beam and the right eye image beam to the eye box. At the same time, the curved reflector has a convergence effect on the light, which can prevent the split left eye image beam and the right eye image beam from diverging. The eye box refers to the distribution range of the eyeballs on the driver's side that can see the complete image.

[0087] Based on the same inventive concept, an embodiment of the present invention provides a vehicle, including the head-up display device provided by any embodiment of the present invention, and a windshield.

[0088] Fig.10 is a schematic diagram of a structure of a carrier provided by an embodiment of the present invention, with reference to Fig.10 The image source 1 outputs the image light, which is then transmitted to the shading element 3 after passing through the cylindrical grating 2. The shading element 3 can block the crosstalk light in the image light. Then the image light is incident on the curved reflector 5, which reflects the image light onto the windshield 6 of the vehicle. The windshield 6 then reflects the image light into the eye box 8. When the human eye observes the image light, a virtual image 7 is seen.

[0089] The curved reflector 5 and / or the windshield 6 are free-form surfaces, which have a non-uniform effect on the optical path. In order to meet the specification requirements during the design process, the plane where the image source 1 is located is not perpendicular to the main optical axis, so there is a phenomenon of symmetry destruction. As a result, the head-up display device has a non-uniform effect on imaging, that is, the imaging optical path causes increased crosstalk in some areas and eliminated crosstalk in some areas.

[0090] Based on the same inventive concept, an embodiment of the present invention provides a design method for a head-up display device, the head-up display device comprising an image source 1, a lenticular lens 2 and a light shielding member 3; the image source 1 is used to generate a left-eye image beam and a right-eye image beam; the lenticular lens 2 is located on the propagation path of the left-eye image beam and the right-eye image beam, and is used to split the left-eye image beam and the right-eye image beam for projection; Fig.11 is a flow chart of a design method of a head-up display device provided by an embodiment of the present invention, with reference to Fig.11 , the design method of the head-up display device includes:

[0091] S101, acquiring a plurality of light crosstalk regions on a cylindrical grating.

[0092] Optionally, multiple light crosstalk areas on the cylindrical grating are obtained, including: retaining only the light on the receiving surface; tracing the light on the receiving surface back to the cylindrical grating to find the distribution of the crosstalk light on the cylindrical grating; and obtaining multiple light crosstalk areas on the cylindrical grating according to the distribution of the crosstalk light on the cylindrical grating.

[0093] Specifically, the receiving surface refers to the plane where the eye box is located, and the light on the receiving surface represents the light seen by the user during the use of the head-up display device. Then, the crosstalk light in the light on the receiving surface is determined, and the light path of the crosstalk light on the receiving surface is traced back to find the distribution of the crosstalk light on the lenticular grating. Finally, according to the distribution of the crosstalk light on the lenticular grating, multiple light crosstalk areas on the lenticular grating are obtained.

[0094] S102. Divide the lenticular grating into at least two lenticular partitions according to the plurality of light crosstalk regions, wherein the lenticular partitions include at least two cylindrical lenses, and the at least two cylindrical lens partitions include a first lenticular partition and a second lenticular partition; wherein the first lenticular partition includes the light crosstalk region.

[0095] If the shading member 3 is indiscriminately arranged on the lenticular grating 2, the light emitted from the area without crosstalk problem will also be blocked, and the resolution of the head-up display device will be reduced, affecting the imaging quality. By distinguishing between the light crosstalk area and the non-light crosstalk area, the influence of the shading member 3 on the resolution can be reduced, and the imaging quality can be improved while reducing the crosstalk phenomenon.

[0096] S103, setting a light shielding member in the first cylindrical lens partition.

[0097] A shading member 3 is provided in the first cylindrical mirror partition to block the light outputted from the first cylindrical mirror partition to eliminate the light that may cause crosstalk problems. The reason for providing the shading member only in the first cylindrical mirror partition is that if the shading member 3 is also provided in the second cylindrical mirror partition without the crosstalk problem, the light-transmitting portion of the cylindrical lens will be greatly reduced, thereby greatly reducing the resolution of the head-up display device and affecting the imaging quality. However, if the shading member 3 is provided only in the first cylindrical mirror partition to accurately block the light that generates crosstalk without affecting the light-transmitting area of ​​the cylindrical lens in the second cylindrical mirror partition, it is possible to reduce the impact on the resolution of the head-up display device while eliminating the crosstalk problem, thereby improving the quality of the image outputted by the head-up display.

[0098] The design method of the head-up display device provided by the embodiment of the present invention blocks the light that causes the crosstalk problem by setting a shading member only in the first column mirror partition that outputs the crosstalk light, thereby alleviating the crosstalk problem of the head-up display device; at the same time, because the shading member does not block the second column mirror partition that outputs the normal image, the problem of resolution reduction of the head-up display device due to the blocking of the output light is reduced.

[0099] Fig.12 is a flow chart of another design method of a head-up display device provided by an embodiment of the present invention, wherein the head-up display device includes a plurality of cylindrical lenses 4, and the plurality of cylindrical lenses 4 are arranged along a first direction x, with reference to Fig.12 , the design method of the head-up display device includes:

[0100] S201, acquiring a plurality of light crosstalk regions on a cylindrical grating.

[0101] S202: Obtain widths of multiple light crosstalk areas along a first direction.

[0102] Optionally, obtaining the widths of the plurality of light crosstalk regions along the first direction includes: obtaining stray light density distribution of the plurality of light crosstalk regions; and obtaining the widths of the light crosstalk regions along the first direction according to the stray light density distribution.

[0103] Specifically, the intensity of stray light in the light crosstalk region is not uniformly distributed. The stray light intensity in some light crosstalk regions is relatively large, and the stray light distribution density is relatively large; the stray light intensity in some light crosstalk regions is relatively small, and the stray light distribution density is relatively small. A stray light density threshold can be set in advance, and the width of the region in the light crosstalk region where the stray light density is greater than the stray light density threshold along the first direction x is the width of the light crosstalk region along the first direction x.

[0104] S203 , acquiring widths of the light shielding members corresponding to the light crosstalk areas along the first direction according to the widths of the plurality of light crosstalk areas along the first direction.

[0105] If the shading member 3 is too small, the crosstalk problem cannot be eliminated. If the shading member 3 is too large, the resolution of the head-up display device will be too low. Therefore, the width of the shading member 3 along the first direction x needs to be set according to the width of the light crosstalk area along the first direction x, so as to improve the resolution of the head-up display device while eliminating the crosstalk problem. Optionally, the width of the shading member 3 along the first direction x is greater than or equal to the minimum crosstalk area width and less than or equal to the maximum crosstalk area width; wherein the minimum crosstalk area width is the minimum width of multiple light crosstalk areas along the first direction x, and the maximum crosstalk area width is the maximum width of multiple light crosstalk areas along the first direction x.

[0106] Optionally, according to the widths of multiple light crosstalk areas along the first direction x, the width of the shading element 3 corresponding to the light crosstalk area along the first direction x is obtained, including: judging whether the width of the light crosstalk area along the first direction x is greater than a threshold value; when the width of the light crosstalk area along the first direction x is greater than the threshold value, setting the width of the shading element 3 along the first direction x to the first width, and when the width of the light crosstalk area along the first direction x is less than or equal to the threshold value, setting the width of the shading element 3 along the first direction x to the second width; the first width is greater than the second width.

[0107] The threshold is a length set in advance, and is used to determine whether the shading member 3 with the second width can better eliminate the crosstalk problem in the optical fiber crosstalk area. If the width of the optical crosstalk area along the first direction x is less than the threshold, then setting the width of the shading member 3 along the first direction x to the second width can better block the crosstalk light emitted from the optical crosstalk area; if the width of the optical crosstalk area along the first direction x is greater than the threshold, then the shading member 3 with the second width along the first direction x is not enough to block the crosstalk light emitted from the optical crosstalk area, and the width of the shading member 3 along the first direction x needs to be set to the first width. The first width is greater than the second width, and a larger shading member 3 can better eliminate the crosstalk problem, but at the same time, the resolution of the head-up display device will be reduced more. Therefore, the size of the threshold can be selected according to actual needs. If a head-up display device with lower crosstalk is required, the threshold can be set to a smaller value so that the width of the shading member 3 along the first direction x is set to more of the first width, thereby better eliminating the crosstalk problem, but the resolution of the head-up display device will be relatively low; if a head-up display device with higher resolution is required, the threshold can be set to a larger value so that the width of the shading member 3 along the first direction x is set to more of the second width, thereby ensuring that the head-up display device has a higher resolution, but the crosstalk problem will be relatively serious.

[0108] S204. Divide the lenticular grating into at least two lenticular partitions according to the plurality of light crosstalk regions, wherein the lenticular partitions include at least two cylindrical lenses, and the at least two cylindrical lens partitions include a first lenticular partition and a second lenticular partition; wherein the first lenticular partition includes the light crosstalk region.

[0109] S205, setting the shading element in the first cylindrical lens partition.

[0110] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A head-up display device, characterized in that: include: An image source, the image source being used to generate a left-eye image beam and a right-eye image beam; A lenticular grating, located on the propagation paths of the left-eye image beam and the right-eye image beam, for splitting and projecting the left-eye image beam and the right-eye image beam; the lenticular grating includes at least two lenticular partitions, and the lenticular partitions include at least two cylindrical lenses; The at least two cylindrical lens partitions include a first cylindrical lens partition and a second cylindrical lens partition. In both the first cylindrical lens partition and the second cylindrical lens partition, the shading member is located in the first cylindrical lens partition.

2. The head-up display device according to claim 1, characterized in that: The light shielding member and the cylindrical lens extend in the same direction.

3. The head-up display device according to claim 1, characterized in that: The light shielding member is located between the image source and the lenticular grating; Alternatively, the light shielding element is located on a side of the lenticular lens away from the image source.

4. The head-up display device according to claim 1, characterized in that: A plurality of cylindrical lenses are arranged along a first direction; The cylindrical lens comprises a central region and an edge region, the geometric center of the cylindrical lens is located in the central region, and along the first direction, the edge region is located at the periphery of the central region; The shading element covers the edge area in a direction perpendicular to the plane where the lenticular grating is located.

5. The head-up display device according to claim 4, characterized in that: In the first column lens partition, a plurality of the light shielding members are periodically arranged.

6. The head-up display device according to claim 4, characterized in that: The edge region includes a first edge region and a second edge region, and in the same cylindrical lens, the first edge region and the second edge region are located on both sides of the central region; In the first cylindrical lens partition, the shading member covers the first edge area; Alternatively, in the first cylindrical lens subarea, the shading element covers the second edge area.

7. The head-up display device according to claim 4, characterized in that: The edge region includes a first edge region and a second edge region, and in the same cylindrical lens, the first edge region and the second edge region are located on both sides of the central region; In the first cylindrical lens subarea, the same light shielding member covers the first edge region and the second edge region of adjacent cylindrical lenses.

8. The head-up display device according to claim 7, characterized in that: Along the first direction, the first edge region and the second edge region have different widths.

9. The head-up display device according to claim 4, characterized in that: The image source includes a plurality of sub-pixels; Along the first direction, the width of the light shielding member is less than or equal to the width of the sub-pixel.

10. The head-up display device according to claim 4, characterized in that: Along the first direction, a width of the cylindrical lens is greater than or equal to 100 μm and less than or equal to 300 μm.

11. The head-up display device according to claim 4, characterized in that: In the first lenticular subarea, a plurality of the light shielding members have the same width along the first direction.

12. The head-up display device according to claim 4, characterized in that: In the first lenticular subarea, there are at least two light shielding members having different widths along the first direction.

13. The head-up display device according to claim 1, characterized in that: It also includes a curved reflector, which is located on the propagation paths of the split left-eye image light beam and the right-eye image light beam.

14. A carrier, characterized in that: It comprises the head-up display device according to any one of claims 1 to 13, and a windshield.

15. A design method for a head-up display device, characterized in that: The head-up display device includes an image source, a lenticular lens and a light shielding member; the image source is used to generate a left-eye image beam and a right-eye image beam; the lenticular lens is located on the propagation path of the left-eye image beam and the right-eye image beam, and is used to split and project the left-eye image beam and the right-eye image beam; The design method comprises: Acquire a plurality of light crosstalk regions on the cylindrical grating; According to the plurality of light crosstalk regions, the lenticular grating is divided into at least two lenticular partitions, wherein the lenticular partitions include at least two cylindrical lenses, and the at least two cylindrical lens partitions include a first lenticular partition and a second lenticular partition; wherein the first lenticular partition includes the light crosstalk region; The shading element is arranged in the first column lens partition.

16. The design method according to claim 15, characterized in that: A plurality of cylindrical lenses are arranged along a first direction; After acquiring a plurality of light crosstalk areas on the cylindrical grating, the method further includes: Obtaining widths of a plurality of the light crosstalk regions along the first direction; According to the widths of the plurality of light crosstalk regions along the first direction, the width of the light shielding member corresponding to the light crosstalk region along the first direction is acquired.

17. The design method according to claim 16, characterized in that: The width of the light shielding member along the first direction is greater than or equal to the minimum crosstalk area width and less than or equal to the maximum crosstalk area width; The minimum crosstalk area width is the minimum width of the plurality of light crosstalk areas along the first direction, and the maximum crosstalk area width is the maximum width of the plurality of light crosstalk areas along the first direction.

18. The design method according to claim 16, characterized in that: Obtaining the widths of the plurality of light crosstalk regions along the first direction comprises: Obtaining the stray light density distribution of a plurality of the light crosstalk areas; According to the stray light density distribution, the width of the light crosstalk area along the first direction is obtained.

19. The design method according to claim 16, characterized in that: According to the widths of the plurality of light crosstalk regions along the first direction, obtaining the width of the light shielding member corresponding to the light crosstalk region along the first direction comprises: Determining whether the width of the light crosstalk area along the first direction is greater than a threshold; When the width of the light crosstalk area along the first direction is greater than a threshold value, the width of the shading element along the first direction is set to a first width; when the width of the light crosstalk area along the first direction is less than or equal to the threshold value, the width of the shading element along the first direction is set to a second width; the first width is greater than the second width.

20. The design method according to claim 15, characterized in that: Acquiring a plurality of light crosstalk regions on the cylindrical grating comprises: Only the light on the receiving surface is retained; Tracing the light on the receiving surface back to the cylindrical grating to find the distribution of the crosstalk light on the cylindrical grating; According to the distribution of the crosstalk light on the lenticular grating, a plurality of light crosstalk areas on the lenticular grating are obtained.

Images