Display module, vehicle-mounted head-up display device and vehicle

Abstract

The utility model discloses a display module, a vehicle-mounted head-up display device and a vehicle, and aims to solve the problem of insufficient brightness of the display module in the prior art. The display module comprises a backlight module and a display panel located on one side of the backlight module. The backlight module comprises a lamp panel, a transparent light plate located on the side, facing the display panel, of the lamp panel, and an optical assembly located on the side, facing the display panel, of the transparent light plate. Wherein the haze of the transparent light plate is less than 60%.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a display module, a vehicle head-up display device, and a vehicle. Background Technology

[0002] A panoramic head-up display (PHUD) is a new type of vehicle visual interaction device. It uses a single image captured by the windshield to overlay and display information such as vehicle speed, navigation, driver assistance system status, and surrounding environmental conditions in a way that is appropriate for the driver's field of vision. This helps reduce visual and physical distractions for the driver when looking down at in-vehicle information, promotes the popularization of intelligent driving, and improves driving safety.

[0003] For drivers, daily driving places higher demands on the brightness and contrast of the PHUD, for example, Figure 1 As shown, the projection display exhibits a postcard effect at night, meaning that the area outside the displayed pattern (the area marked SA) still has a certain degree of brightness, affecting the viewing of the background environment. Utility Model Content

[0004] This invention provides a display module, a vehicle head-up display device, and a vehicle to improve the problem of insufficient brightness in existing display modules.

[0005] This utility model embodiment provides a display module, including: a backlight module, and a display panel located on one side of the backlight module;

[0006] The backlight module includes: a lamp panel, a transparent light panel located on the side of the lamp panel facing the display panel, and an optical component located on the side of the transparent light panel facing the display panel; wherein the haze of the transparent light panel is less than 60%.

[0007] In one possible implementation, the haze of the transparent light plate is zero.

[0008] In one possible implementation, the transparent light plate comprises only a transparent matrix.

[0009] In one possible implementation, the lamp panel includes: a light-emitting substrate, and a light-emitting element located on one side of the light-emitting substrate;

[0010] The transparent light plate is in direct contact with the surface of the light-emitting element on the side opposite to the light-emitting substrate.

[0011] In one possible implementation, the thickness of the transparent light plate is 4mm to 8mm.

[0012] In a possible implementation, the backlight module further comprises a reflective sheet between the lamp plate and the transparent light plate; the reflective sheet has openings at positions corresponding to the light emitting elements.

[0013] In a possible implementation, the transparent light plate comprises a first surface towards the lamp plate, a second surface away from the lamp plate, and a side surface connecting the first surface and the second surface; the side surface has a roughness less than 0.1.

[0014] In a possible implementation, the optical assembly comprises a composite prism sheet.

[0015] The composite prism sheet comprises a first prism sheet and a second prism sheet attached to a side of the first prism sheet away from the transparent light plate; the first prism sheet comprises a first substrate and a first prism layer on a side of the first substrate towards the second prism sheet; the second prism sheet comprises a second substrate and a second prism layer on a side of the second substrate away from the first prism sheet.

[0016] The first prism layer comprises a plurality of first prisms extending along a first direction and arranged along a second direction in sequence; the second prism layer comprises a plurality of second prisms extending along the second direction and arranged along the first direction in sequence; the second direction is perpendicular to the first direction.

[0017] In a possible implementation, the optical assembly comprises a composite deflection brightness enhancement film on a side of the composite prism sheet away from the transparent light plate.

[0018] The composite deflection brightness enhancement film comprises a third substrate, a bidirectional brightness gain film on a side of the third substrate towards the composite prism sheet, and a third prism layer on a side of the bidirectional brightness gain film towards the composite prism sheet.

[0019] The third prism layer comprises a plurality of third prisms extending along a third direction and arranged along a fourth direction in sequence; the fourth direction is perpendicular to the third direction; the third prisms have prism bottom surfaces in contact with the bidirectional brightness gain film, and first prism side surfaces and second prism side surfaces connected to the prism bottom surfaces; an included angle formed by the first prism side surface and the prism bottom surface is different from an included angle formed by the second prism side surface and the prism bottom surface.

[0020] In a possible implementation, the optical assembly comprises a microstructure diffusion film on a side of the composite prism sheet towards the transparent light plate.

[0021] The utility model also provides a vehicle-mounted head-up display device, including as the utility model provides display module.

[0022] The utility model also provides a vehicle, including the vehicle-mounted head-up display device like the utility model provides, still include: windshield glass and the first film layer of pasting to the side of the windshield glass towards the owner, the first film layer is to p light reflectivity greater than or equal to 20%.

[0023] In a possible implementation, the first film layer comprises: a fourth substrate, a multilayer structure reflecting film located on a side of the fourth substrate facing away from the windshield glass; the multilayer structure reflecting film comprises at least two layers of sub-reflection films arranged in a stack, so as to increase the P light reflection amount of light passing through the multilayer structure reflecting film.

[0024] In a possible implementation, the first film layer further comprises: a hardness covering film located between the fourth substrate and the multilayer structure reflecting film, and an optical adhesive layer located on a side of the fourth substrate facing the windshield glass.

[0025] In a possible implementation, the display module has a light exit surface and a first straight line perpendicular to the light exit surface; the strongest light ray emitted by the display module forms an angle with the first straight line in a range of 8° to 20°; and the windshield glass forms an angle with a horizontal plane in a range of 35° to 50°.

[0026] The utility model discloses the beneficial effect as follows: in the utility model, the backlight unit includes: lamp board, the transparent light board of the side of lamp board towards display panel and the optical assembly of the side of transparent light board towards display panel, wherein, the haze of transparent light board is less than 60%, compared with the haze of the diffusion plate of the backlight unit in conventional technical usually above 60%, in the utility model, by using transparent light to replace conventional diffusion plate, can promote the light brightness of backlight unit, improve the problem of the head-up display device of prior art because of insufficient brightness, and the head-up display experience effect is not good, and moreover, through the backlight unit of high light brightness provided by the utility model, subsequent partial dimming technology can be matched, on the basis of reducing backlight power consumption, improve the brightness and picture contrast of part of projection picture, improve the postcard effect of the head-up display device. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the postcard effect schematic diagram of relevant head-up display device for vehicle;

[0028] Figure 2 It is the structure schematic diagram of display module provided by the utility model embodiment;

[0029] Figure 3 It is the structure schematic diagram of composite prism sheet provided by the utility model embodiment;

[0030] Figure 4 A structure schematic view of the composite deflection incremental film provided by the embodiment of the present application is provided.

[0031] Figure 5 A module viewing angle luminance radar chart schematic view provided by the embodiment of the present application is provided.

[0032] Figure 6 A module viewing angle luminance sectional view schematic view provided by the embodiment of the present application is provided.

[0033] Figure 7 A P light (dotted line) and S light reflection change chart schematic view provided by the embodiment of the present application is provided.

[0034] Figure 8 A schematic view of the vehicle-mounted head-up display device provided by the embodiment of the present application is provided.

[0035] Figure 9 A schematic view of the first film layer provided by the embodiment of the present application is provided.

[0036] Figure 10 A p light reflection film reflection curve schematic view of the first film layer provided by the embodiment of the present application is provided.

[0037] Figure 11 A partial schematic view of the vehicle-mounted head-up display device provided by the embodiment of the present application is provided.

[0038] Figure 12 A schematic view of the back surface of the attached first film layer area being provided as a black background is provided.

[0039] Figure 13 A position schematic view of the display module provided by the present application is provided. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme of the embodiments of the present disclosure will be described clearly and completely below in combination with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present disclosure.

[0041] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the ordinary meaning as understood by a person having ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", and similar terms are used herein to distinguish one element from another, but do not necessarily indicate an order of importance, a number or one of importance, or a specific importance. The terms "comprise", "include" and similar terms mean that the elements or objects before the term encompass the elements or objects listed after the term and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0042] As used herein, "about" or "approximately" includes the recited value and means within an acceptable range of deviation for a particular value as determined by one of ordinary skill in the art to which the discussion pertains, and which is related to the error in measurement of the particular quantity (i.e., limitations of the measurement system). For example, "about" can mean within one or more standard deviations, or within ± 30%, 20%, 10%, 5% of the recited value.

[0043] In the drawings, the thicknesses of layers, films, panels, regions, etc., can be exaggerated for clarity. Descriptive implementations are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized implementations. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Thus, embodiments described herein are not to be construed as being limited to the particular shapes of regions as illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an area illustrated or described as flat can typically have rough and / or nonlinear features. Moreover, sharp angles that are illustrated can be rounded. Thus, the regions illustrated in the figures are schematic and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the present claims.

[0044] In order to keep the following description of the embodiments of the present disclosure clear and concise, detailed description of known functions and known components is omitted in the present disclosure.

[0045] Referring to Figure 2 As shown, the display module provided by the embodiment of the present application comprises a backlight module 100 and a display panel 200 located at one side of the backlight module 100. The backlight module 100 comprises a lamp plate 10, a transparent light plate 20 located at the side of the lamp plate 10 facing the display panel 200, and an optical assembly 30 located at the side of the transparent light plate 20 facing the display panel 200. The haze of the transparent light plate 20 is less than 60%.

[0046] The backlight module 100 comprises: a lamp plate 10, a transparent light plate 20 located on the side of the lamp plate 10 facing the display panel 200, and an optical assembly 30 located on the side of the transparent light plate 20 facing the display panel 200; wherein the haze of the transparent light plate 20 is less than 60%, compared with the haze of the diffusion plate of the backlight module in the conventional technology, which is usually more than 60%, in the utility model, the transparent light plate 200 is used to replace the conventional diffusion plate, so that the light brightness of the backlight module 100 can be improved, and the problem that the head-up display experience effect of the existing vehicle-mounted head-up display device is poor due to insufficient brightness can be solved; in addition, the backlight module with high light brightness provided by the utility model is matched with the local dimming technology, so that the brightness and the picture contrast of part of the projection picture can be improved on the basis of reducing the backlight power consumption, and the postcard effect of the vehicle-mounted head-up display device can be improved.

[0047] In a possible implementation, the haze of the transparent light plate 20 is zero. In this way, the display module 100 has high light brightness.

[0048] In a possible implementation, the transparent light plate 20 only comprises a transparent matrix. Compared with the conventional diffusion plate which usually comprises a transparent matrix and mixed diffusion particles in the transparent matrix, in the utility model, the transparent light plate 20 can not comprise diffusion particles, but only comprises a transparent matrix, so as to realize high light brightness.

[0049] In a possible implementation, referring to FIG. 1, Figure 2 As shown in FIG. 1, the lamp plate 10 comprises: a light-emitting substrate 11 and a light-emitting element 12 located on one side of the light-emitting substrate 11; and the transparent light plate 20 is directly in contact with the surface of the light-emitting element 12 away from the light-emitting substrate 11. In the utility model, the transparent light plate 20 is directly in contact with the surface of the light-emitting element 12 away from the light-emitting substrate 11, that is, no gap is arranged between the transparent light plate 20 and the light-emitting element 12, so that the light emitted by the light-emitting element 12 is directly incident on the transparent light plate 20, and the light brightness of the backlight module 100 is improved.

[0050] In a possible implementation, the light emitting element 12 can be a light emitting diode (LED). For example, a mini light emitting diode (Mini LED, Micro LED, etc.). The micro light emitting diode in the order of sub-millimeter or even micrometer and the organic light emitting diode (OLED) are self-luminous devices. Like the organic light emitting diode, it has a series of advantages such as high brightness, ultra-low delay, ultra-large viewing angle, etc. And because the inorganic light emitting diode emits light based on the metal semiconductor with more stable properties and lower resistance, it has the advantages of lower power consumption, longer service life, and better resistance to high and low temperatures compared with the organic light emitting diode based on organic matter. And when the micro light emitting diode is used as a backlight, it can achieve more precise dynamic backlight effect, effectively improve the screen brightness and contrast, and solve the glare phenomenon caused by the traditional dynamic backlight between the screen bright and dark areas, and optimize the visual experience.

[0051] In a possible implementation, the thickness of the transparent light plate 20 is 4mm-8mm. In a possible implementation, the thickness of the transparent light plate 20 is 4mm, 5mm, 6mm, 7mm or 8mm. In the conventional technology, the diffusion plate is about 2mm thick, and a gap of about 4mm needs to be provided between the diffusion plate and the surface of the light emitting element to ensure that there is no shadow problem; in the utility model, the transparent light plate 20 directly contacts the surface of the side of the light emitting element 12 away from the light emitting substrate 11, and the thickness of the transparent light plate 20 is increased, which can also eliminate the shadow problem, and at the same time, the light emitted by the light emitting element 12 can be directly incident on the transparent light plate 20, thereby improving the light brightness of the backlight module 100.

[0052] In a possible implementation, referring to Figure 2 The backlight module 100 further includes a reflective sheet 40 located between the lamp plate 10 and the transparent light plate 20; the reflective sheet 40 has an opening K at a position corresponding to the light emitting element 12. In the utility model, the backlight module 100 further includes the reflective sheet 40 located between the lamp plate 10 and the transparent light plate 20, so as to reflect the light reflected back to the reflective sheet 40 back to the transparent light plate 20 again, thereby improving the light brightness of the display module 100.

[0053] In a possible implementation, referring to Figure 2As shown, the transparent light plate 20 includes: a first surface S1 towards the lamp plate 10 side, a second surface S2 away from the lamp plate 10 side, and a side surface S3 connecting the first surface S1 and the second surface S2; the roughness of the side surface S3 reaches less than 0.1. In the utility model, the four side surfaces S3 of the transparent light plate 20 can be cut flat and polished to make the surface roughness Ra of the side surface S3 reach <0.1, which can reduce the direct irradiation of the large-angle light emitted by the light emitting element 12 of the lamp plate 10 (for example, in a conventional backlight module, the light emitting element (such as LED) is arranged at a distance of 2mm from the edge, and the angle greater than 26° will be directly irradiated on the lamp plate in theory) to the backlight backboard. In the utility model, the roughness of the side surface S3 reaches less than 0.1, which can improve the light brightness of the transparent light plate 20, and further improve the light brightness of the display module 100.

[0054] In a possible implementation, referring to Figure 2 As shown, the optical assembly 30 includes: a microstructure diffusion film 33 located on the composite prism sheet 31 towards the transparent light plate 20 side. Optionally, the microstructure diffusion film 33 can include two diffusion sheets arranged in a stack. In the utility model, the microstructure diffusion film 33 can be light-uniformed to make the light emitted uniformly at each position of the backlight module 100.

[0055] In a possible implementation, referring to Figure 3 As shown, the optical assembly 30 includes: a composite prism sheet 31; the composite prism sheet 31 includes: a first prism sheet L1 and a second prism sheet L2 attached to the first prism sheet L1 away from the transparent light plate 20 side; wherein the first prism sheet L1 includes: a first substrate L11, and a first prism layer L12 located on the first substrate L11 towards the second prism layer L2 side; the second prism sheet L2 includes: a second substrate L21, and a second prism layer L22 located on the second substrate L21 away from the first prism sheet L1 side;

[0056] The first prism layer L12 includes: a plurality of first prisms L10 extending along the first direction X and arranged in sequence along the second direction Y; the second prism layer L22 includes: a plurality of second prisms L20 extending along the second direction Y and arranged in sequence along the first direction X; the second direction Y is perpendicular to the first direction X. That is, the extension direction of the first prism L10 in the first prism layer L12 can be perpendicular to the extension direction of the second prism L20 in the second prism layer L22.

[0057] The utility model discloses a composite prism sheet 31 includes: first prism sheet L1 and the second prism sheet L2 of attaching on the one side of first prism sheet L1 away from transparent light plate 20, that is, first prism sheet L1 and second prism sheet L2 mutually attach, compared with conventional double prism design, the utility model discloses composite prism sheet 31 has no air layer between double prism, reduce the reflection and transmission energy loss caused in the process of air layer and film material two different propagation medium of light energy, and further can also promote the light output luminance of backlight module 100.

[0058] In one possible implementation, referring to Figs. Figure 2 and Figure 4 The optical assembly 30 includes a composite deflection brightness enhancement film 32 located on the side of the composite prism sheet 31 away from the transparent light plate 20. The composite deflection brightness enhancement film 32 includes a third substrate 321, a dual brightness enhancement film 322 located on the side of the third substrate 321 facing the composite prism sheet 31, and a third prism layer 323 located on the side of the dual brightness enhancement film 322 facing the composite prism sheet 31. The third prism layer 323 includes a plurality of third prisms L30 extending along a third direction Z1 and arranged along a fourth direction Z2 in sequence. The fourth direction Z2 is perpendicular to the third direction Z3. The third prism L10 has a prism bottom surface f0 in contact with the dual brightness enhancement film 322, and a first prism side surface f1 and a second prism side surface f2 connected to the prism bottom surface f0. The first prism side surface f1 and the prism bottom surface f0 form an angle a1, which is different from an angle a2 formed by the second prism side surface f2 and the prism bottom surface f0.

[0059] In the utility model, the composite deflection brightness enhancement film 32 includes a third substrate 321, a dual brightness enhancement film 322 (DBEF) located on the side of the third substrate 321 facing the composite prism sheet 31, and a third prism layer 323 located on the side of the dual brightness enhancement film 322 facing the composite prism sheet 31. Compared with the conventional deflection brightness enhancement design, the composite deflection brightness enhancement film 32 of the utility model has no air layer between the dual brightness enhancement film 322 and the third prism layer 323, reducing the reflection and transmission energy loss caused in the process of air layer and film material two different propagation medium of light energy, and further improving the light output luminance of the backlight module 100. Moreover, the first prism side surface f1 and the prism bottom surface f0 form an angle a1, which is different from an angle a2 formed by the second prism side surface f2 and the prism bottom surface f0, so that the angle of the outgoing light can be deflected to achieve high-brightness emission at a specific angle.

[0060] The utility model discloses a high light efficiency backlight carries out actual data test based on the high light efficiency backlight provided by the application, voltage 21V, current 0.3A, power consumption 6.3W under the condition of testing backlight brightness, after testing, the backlight brightness of the backlight scheme of the utility model compares the brightness of the current vehicle-mounted conventional mass production backlight module and improves 71%. The utility model discloses a display module view angle deflection angle radar chart and sectional view are tested, wherein, the display module view angle deflection angle radar chart is as shown in Figure 5 The display module view angle deflection angle sectional view is as shown in Figure 6 The display module view angle deflection angle sectional view is as shown in Figure 6 The horizontal coordinate represents the composite deflection brightness enhancement film prism layer prism arrangement direction angle, and the vertical film material surface direction is 0 degrees, and the longitudinal coordinate represents the brightness, and the unit is nit, and the brightness peak view angle deflects 10 degrees, and meets the design requirement.

[0061] Based on the same concept, the utility model still provides a vehicle-mounted head-up display device, comprising the display module provided by the utility model.

[0062] Based on the same concept, the utility model still provides a vehicle, comprising the vehicle-mounted head-up display device provided by the utility model.

[0063] When polarized light is incident on the automobile glass from the air, reflection will occur on the glass surface, referring to the reflectivity of P light and S light in the air-glass interface as shown in Figure 7 It can be seen that the S light reflectivity is higher than the P light on the interface, that is, when the light is incident on the windshield from the air, the reflected light is mainly S light. The P light reflectivity is lowest at 0% near the incident angle of 57°; the P light reflectivity is about 0.3% near the incident angle of 60°; while the S polarized light reflectivity is about 20% at this angle; that is, if the light emitted by the display module is s light, the driver in the car mainly observes the S light reflected by the windshield, and the polarized state of the conventional sunglasses worn by the human eye is p light, if the display module emits P light and the windshield mainly reflects s light, it will cause the human eye to hardly see the reflected light.

[0064] Therefore, the utility model provides a vehicle, referring to Figure 8As shown, it comprises: a windshield, and a first film layer 400 attached to the side of the windshield facing the owner; the first film layer 400 has a p light reflectivity of 20% or more. In the utility model, by attaching the first film layer 400 to the side of the windshield facing the owner, the first film layer 400 has a p light reflectivity of 20% or more, thereby improving the problem that the sun glasses cannot be seen in the vehicle; moreover, since the windshield usually comprises double-layer glass and a glue layer sandwiched between the double-layer glass, the double-layer glass can comprise: front glass closer to the owner, and rear glass closer to the external environment, and the p light reflection is mainly concentrated on the front glass of the windshield, and the p light reflectivity of the rear glass itself is very low; the utility model simultaneously solves the ghosting problem (when the light of the display module is imaged on the front glass and the rear glass respectively and does not overlap, ghosting occurs) by attaching the first film layer 400, thereby avoiding the use of a wedge-shaped windshield to solve the problem, and the utility model solves the ghosting problem by attaching the first film layer 400, thereby achieving simple process and cost reduction.

[0065] In a possible implementation, referring to Figure 9 As shown, the first film layer 400 comprises: a fourth substrate 41, and a multilayer structure reflective film 42 located on the side of the fourth substrate 41 away from the windshield; the multilayer structure reflective film 42 comprises at least two layers of sub-reflection films arranged in a stack, so that the p light reflection amount of the light passing through the multilayer structure reflective film is increased. The sub-reflection film can be understood as a film layer formed by a process mode such as chemical deposition, evaporation or sputtering, and having a specific refractive index and a specific nanometer level thickness; in the utility model, the multilayer structure reflective film 42 comprises at least two layers of sub-reflection films arranged in a stack, and the p light reflectivity is increased through nanometer multilayer film interference enhancement, thereby improving the problem that the sun glasses cannot be seen in the vehicle. For example, taking the wavelength range 380nm-780nm in the visible light band as an example, the thickness of the sub-reflection film is set to 1 / 4 of the wavelength range of visible light, i.e. 95nm-195nm ((380nm-780nm) / 4), and the more the number of layers in this interval is, the higher the reflectivity is.

[0066] In a possible implementation, referring to Figure 9 As shown, the first film layer 400 further comprises: a hardness covering film 43 (Hard coating) located between the fourth substrate 41 and the multilayer structure reflective film 42, and an optical glue layer 44 located on the side of the fourth substrate 41 facing the windshield.

[0067] The inventor of the utility model tests the p light reflectivity of the first film layer 400 provided in the application in the visible light band 380nm-780nm, and the test result is shown in the following table: Figure 10 As shown, the p light reflectivity can be increased to 20% or more.

[0068] In one possible implementation, see Figure 11 As shown, this is a partial schematic diagram of the in-vehicle head-up display device, which can display images in the lower area of ​​the windshield.

[0069] In one possible implementation, the background of the area where the first film layer 400 is attached can be set to a black background, that is, as shown in the image. Figure 12 As shown, black ink is sprayed onto the back of the rear glass in the area where the first film layer 400 is attached to the windshield to achieve a higher display contrast; in another possible embodiment, the background of the area where the first film layer 400 is attached can be a transparent background without ink.

[0070] In one possible implementation, see Figure 13 As shown, the display module has a light-emitting surface G and a first straight line L1 perpendicular to the light-emitting surface G; the angle β1 formed between the strongest light ray L2 emitted by the display module and the first straight line L1 ranges from 8° to 20°; the angle β2 formed between the windshield and the horizontal plane ranges from 35° to 50°. For example, the angle β1 formed between the strongest light ray L2 emitted by the display module and the first straight line L1 can be 8°, 10°, 12°, 15° or 20°; for example, the angle β2 formed between the windshield and the horizontal plane can be 35°, 40°, 45° or 50°; wherein, the strongest light ray L2 can be the light emitted after adjustment by setting the composite deflection and brightness enhancement film 32 of the display module of this utility model.

[0071] In one possible implementation, see Figure 13 As shown, the height difference between the human eye and the display module can range from 300mm to 420mm, for example, it can be 360mm (that is, Figure 13 In the middle, 360 = 550 - 190).

[0072] In this invention, the vehicle head-up display is reflected by the windshield and uses a large oxide screen. It can be equipped with a 2850-zone mini LED backlight system. The system uses high-brightness LEDs and a specific angle deflection film material design to achieve a modular peak brightness of 7000 nits (10% area) and a million-level contrast ratio, as well as 9K ultra-high resolution, further optimizing driving visibility and improving driving safety. The large-screen PHUD is used for windshield projection and distortion correction. A p-light reflective film with a first layer is attached to the windshield to ensure clear and accurate information transmission.

[0073] While the preferred embodiments of the disclosure have been described, additional variations and modifications can be made to these embodiments by those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to encompass within their scope all possible variations and modifications of the preferred embodiments.

[0074] It is apparent that those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope thereof. It is therefore intended to include within the ambit of the present application all such changes and modifications as fall within the scope of the claims and their equivalents.

Claims

1. A display module, characterized by The display module comprises: a backlight module and a display panel located on one side of the backlight module; the backlight module comprises a lamp plate, a transparent light plate located on the side of the transparent light plate facing the display panel, and an optical assembly located on the side of the transparent light plate facing the display panel; wherein the haze of the transparent light plate is less than 60%.

2. The display module of claim 1, wherein, The haze of the transparent light plate is zero.

3. The display module of claim 2, wherein the display module is configured to be mounted to a display module mounting surface of a display module mounting structure. The transparent light plate only comprises a transparent substrate.

4. The display module of claim 1, wherein, The lamp plate comprises a light-emitting substrate and a light-emitting element located on one side of the light-emitting substrate; The transparent light plate is in direct contact with the surface of the light-emitting element away from the light-emitting substrate.

5. The display module of claim 4, wherein the display module is configured to be mounted to a display module mounting surface of a display module mounting structure. The thickness of the transparent light plate is 4mm-8mm.

6. The display module of claim 4, wherein the display module is configured to be mounted on a display stand. The backlight module further comprises a reflective sheet located between the lamp plate and the transparent light plate; the reflective sheet has an opening at a position corresponding to the light-emitting element.

7. The display module of claim 1, wherein the display module is configured to be mounted to a display module mounting surface of a display module mounting structure. The transparent light plate comprises a first surface facing the lamp plate, a second surface away from the lamp plate, and a side surface connecting the first surface and the second surface; the roughness of the side surface is less than 0.

1.

8. The display module of claim 1, wherein, The optical assembly comprises a composite prism sheet; The composite prism sheet comprises a first prism sheet and a second prism sheet attached to the side of the first prism sheet away from the transparent light plate; wherein the first prism sheet comprises a first substrate and a first prism layer located on the side of the first substrate facing the second prism sheet; the second prism sheet comprises a second substrate and a second prism layer located on the side of the second substrate away from the first prism sheet; The first prism layer comprises a plurality of first prisms extending in a first direction and arranged in a second direction in sequence; the second prism layer comprises a plurality of second prisms extending in the second direction and arranged in the first direction in sequence; the second direction is perpendicular to the first direction.

9. The display module of claim 8, wherein the display module is configured to be mounted to a display module mounting surface of a display module mounting structure. The optical assembly comprises a composite deflection brightness enhancement film located on the side of the composite prism sheet away from the transparent light plate; The composite deflection brightness enhancement film comprises a third substrate, a bidirectional brightness gain film located on the side of the third substrate facing the composite prism sheet, and a third prism layer located on the side of the bidirectional brightness gain film facing the composite prism sheet; The third prism layer comprises a plurality of third prisms extending in a third direction and arranged in a fourth direction in sequence; the fourth direction is perpendicular to the third direction; the third prisms have prism bottom surfaces in contact with the bidirectional brightness gain film, and first prism side surfaces and second prism side surfaces connected to the prism bottom surfaces; wherein the included angle formed by the first prism side surface and the prism bottom surface is different from the included angle formed by the second prism side surface and the prism bottom surface.

10. The display module of claim 9, wherein the display module is configured to be mounted on a display device. The optical assembly comprises a microstructure diffusion film located on the side of the composite prism sheet facing the transparent light plate.

11. A head-up display device for a vehicle, characterized by comprising: The display module comprises any one of claims 1-10.

12. A vehicle characterized by comprising: The vehicle-mounted head-up display device comprises the display module, a windshield, and a first film layer attached to the side of the windshield facing the driver; the first film layer has a p-light reflectivity greater than or equal to 20%.

13. The vehicle of claim 12, wherein, The first film layer comprises: a fourth substrate, a multilayer structure reflective film located on a side of the fourth substrate facing away from the windshield; the multilayer structure reflective film comprises at least two sub-reflection films arranged in a stack, so as to increase the P light reflection amount of light passing through the multilayer structure reflective film.

14. The vehicle of claim 13, wherein, The first film layer further comprises: a hardness cover film located between the fourth substrate and the multilayer structure reflective film, and an optical adhesive layer located on a side of the fourth substrate facing the windshield.

15. The vehicle of claim 12, wherein, The display module has a light-out surface and a first straight line perpendicular to the light-out surface; the strongest light ray emitted by the display module forms an angle with the first straight line in a range of 8°-20°; and the windshield forms an angle with a horizontal plane in a range of 35°-50°.

Images