Dual-view mini led vehicle-mounted display device and control method thereof

Abstract

The present application relates to the technical field of display, especially to a dual-view mini LED vehicle-mounted display device and a control method thereof.The dual-view mini LED vehicle-mounted display device comprises a main frame, a first view backlight assembly and a second view backlight assembly.The main frame comprises an upper glue shell, an inner glue frame, a middle glue shell and a lower frame.The middle glue shell is connected with the lower frame, the upper glue shell is connected with the middle glue shell, and the inner glue frame is connected with the bottom of the lower frame.The first view backlight assembly comprises a first light source assembly, which is arranged on one inner side wall of the lower frame.The second view backlight assembly comprises a second light source assembly and a view angle suppression piece, which is located on one side of the second light source assembly in the light emitting direction.The view angle suppression piece is located on the side of the first view backlight assembly opposite to the light emitting direction.The present application can be conveniently and quickly switched between two different view angles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a dual-view mini LED vehicle display device and a control method thereof. BACKGROUND

[0002] With the development of intelligent cockpit and driving assistance system, the vehicle display device (HUD) has become an important part to improve driving safety and human-computer interaction experience. The existing vehicle display adopts a fixed optical stack design, which realizes a single view angle characteristic close to Lambert distribution through a side-in or direct-down backlight combined with a diffusion plate, a light enhancement film, a polarizer or a reflector sheet, etc. Such a scheme determines the exit angle distribution in the optical design stage, and once mass production is completed, it is difficult to switch the view angle according to the scene during vehicle use. When the occupants need to share information (such as navigation, vehicle status), a larger view angle is beneficial for multi-position viewing; but in the scene involving personal privacy or avoiding driver distraction (such as co-driver entertainment, payment / account information, and notifications containing sensitive content), lateral visibility needs to be suppressed to reduce the risk of lateral leakage and glare. The fixed view angle of the single display mode cannot meet the needs of both shared visibility and privacy prevention.

[0003] To meet the privacy needs, the prior art has attempted to stack a static privacy film / microstructure film on the basis of a single backlight, but this method can only provide a fixed and non-switchable narrow view angle, and generally has problems such as significant reduction in brightness, contrast and chroma offset, moire risk, increased thickness (OD) and assembly tolerance requirements; when full view angle shared viewing is needed, the above defects cannot be eliminated. Some other schemes attempt to use movable louver mechanical shielding to change the view angle, but the mechanical structure introduces additional thickness and weight, and is affected by vehicle vibration and temperature cycling, so the reliability, response speed, noise and cost cannot meet the requirements of vehicle production. SUMMARY

[0004] Therefore, the embodiments of the present application provide a dual-view mini LED vehicle display device to solve the technical problem that the existing vehicle display device cannot conveniently switch between full view angle and suppressed view angle.

[0005] In a first aspect, the present application provides a dual-view mini LED vehicle display device, comprising:

[0006] A main frame comprising an upper glue shell, an inner glue frame, a middle glue shell and a lower frame, the middle glue shell is connected with the lower frame, the upper glue shell is connected with the middle glue shell, and the inner glue frame is connected with the bottom of the lower frame.

[0007] A first view angle backlight assembly comprising a first light source assembly, the first light source assembly is arranged on one inner side wall of the lower frame.

[0008] The second view angle backlight assembly comprises a second light source assembly and a view angle suppression member, and the view angle suppression member is located on the light emitting direction side of the second light source assembly.

[0009] The view angle suppression member is located on the side opposite to the light emitting direction of the first view angle backlight assembly.

[0010] In a second aspect, the present application further provides a dual-view mini LED vehicle-mounted display device control method for controlling the dual-view mini LED vehicle-mounted display device of the first aspect, and the method comprises:

[0011] S1: obtaining a view angle display mode, wherein the view angle display mode comprises a full view angle display mode and a suppressed view angle display mode;

[0012] S2: determining a target light source assembly for display according to the view angle display mode from the first light source assembly and the second light source assembly;

[0013] S3: obtaining a light source driving parameter according to the image display information;

[0014] S4: driving the target light source assembly to work according to the light source driving parameter.

[0015] In summary, the beneficial effects of the present application are as follows:

[0016] The dual-view mini LED vehicle-mounted display device and the control method thereof provided by the present application decouple the full view angle and the suppressed view angle from the light path level by arranging the first view angle backlight assembly and the second view angle backlight assembly independently in the same main frame, arranging the view angle suppression member on the light emitting side of the second light source assembly and on the side opposite to the light emitting of the first view angle backlight assembly, forming two light emitting paths that do not interfere with each other, thereby realizing the quick and stable switching of the two view angles without the movable mechanism, and keeping the boundary clean, the contrast and the uniformity consistent before and after the switching; in addition, the present application establishes a clear assembly reference through the connection relationship of the upper glue shell, the inner glue frame, the middle glue shell and the lower frame, improves the assembly efficiency and the position accuracy; the first light source assembly is arranged along the inner side wall of the lower frame, which is beneficial to improve the structural compactness and the space utilization rate, and reduce the risk of shielding the light emitting surface; the reverse arrangement of the view angle suppression member relative to the first view angle backlight assembly can also reduce the light path crosstalk between the two sets of backlights, and improve the display stability and the usability in different scenes as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments of the present application will be briefly introduced as follows, and other drawings can also be obtained by those skilled in the art without creative labor on the premise that these drawings are within the protection scope of the present application.

[0018] Figure 1 is the exploded structure schematic diagram of the dual-view miniLED vehicle-mounted display device of the present application.

[0019] Figure 2 is the exploded structure schematic diagram of the main body frame in the present application.

[0020] Figure 3 is the structure schematic diagram of the first-view backlight assembly in the present application.

[0021] Figure 4 is the structure schematic diagram of the second-view backlight assembly in the present application.

[0022] Figure 5 is the structure schematic diagram of the front of the lamp plate in the present application.

[0023] Figure 6 is the structure schematic diagram of the back of the lamp plate in the present application.

[0024] Figure 7 is the structure schematic diagram of the back of the lower frame in the present application.

[0025] Figure 8 is the flowchart of the control method of the dual-view miniLED vehicle-mounted display device of the present application.

[0026] Parts and their numbers in the figure:

[0027] Upper rubber shell 111, inner rubber frame 112, middle rubber shell 113, lower frame 114, side wall bump 1141, L-shaped anti-loosening silica gel 1142, heat-conducting glue 1143, conductive double-sided adhesive 1144, insulating glue 1145, edge covering glue 1146, fixed inner rubber frame double-sided adhesive 121, reflective film component 122, light bar 211, lampshade 212, first buckle 2121, first diffusion plate 220, reflective side film 230, light reflection strip 240, lamp plate 311, flip blue light miniLED chip 3111, IC chip 3113, copper exposure area 312, view angle suppression component 320, second diffusion plate 330, light dispersion film 340, red-green light filter film 350, fluorescent film 360, lower light enhancement film 370, middle light enhancement film 380, diaphragm positioning column 391, three-stage stepped boss 392, positioning clamping lug 393, positioning groove 394, diaphragm fixing glue 395. DETAILED DESCRIPTION

[0028] The features and exemplary embodiments of the various aspects of the present application will be described in detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are merely configured to explain the present application and are not configured to limit the present application. The present application can be implemented without some of the specific details described below for the person skilled in the art. The following description of the embodiments is merely to provide a better understanding of the present application by showing examples of the present application.

[0029] It should be noted that, in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the elements defined by the statement "include" do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0030] It should be noted that all actions of obtaining signals, information or data in the present application are carried out in compliance with the corresponding data protection regulations and policies of the place, and with the authorization given by the owner of the corresponding device.

[0031] Embodiment 1

[0032] See Figure 1 The embodiment provides a dual-view mini LED vehicle-mounted display device, which comprises a main frame, a first view backlight assembly and a second view backlight assembly.

[0033] The first view backlight assembly and the second view backlight assembly are two independent backlight units respectively; the first light source assembly is arranged on one inner side wall of the lower frame 114, which is a linear light source arranged on the side wall; the view angle suppression member 320 is an optical limiting structure (such as a micro-louver privacy film, a microlens grid, a collimating grid, etc.) for limiting the exit angle distribution; the light-emitting direction is the normal direction of the panel or the observer pointed by the backlight from the light-emitting surface.

[0034] Among them, the main frame is a structure collection of bearing and limiting each backlight assembly. For example Figure 2As shown, the main frame comprises an upper rubber shell 111, an inner rubber frame 112, a middle rubber shell 113 and a lower frame 114, the middle rubber shell 113 is clamped with the lower frame 114, the upper rubber shell 111 is clamped with the middle rubber shell 113, and the inner rubber frame 112 is connected with the bottom of the lower frame 114; the clamping refers to the detachable mechanical cooperation of the relative components through the buckle, the protrusion and the corresponding slot, which is used for quick positioning and limiting in the light emitting direction; the bottom connection refers to the fixed connection of the inner rubber frame 112 and the lower frame 114 in the bottom direction, for example, bonding.

[0035] The embodiment is provided with a buckle position on the side wall of the upper rubber shell 111, and the buckle is buckled on the convex block on the side wall of the middle rubber shell 113, so as to realize the buckling and fixing of the upper rubber shell 111 on the middle rubber shell 113.

[0036] The first viewing angle backlight assembly comprises a first light source assembly, which is arranged on one inner side wall of the lower frame 114.

[0037] The second viewing angle backlight assembly comprises a second light source assembly and a viewing angle suppression member 320, and the viewing angle suppression member 320 is located on the side of the second light source assembly in the light emitting direction.

[0038] The viewing angle suppression member 320 is located on the side of the first viewing angle backlight assembly opposite to the light emitting direction.

[0039] The first viewing angle backlight assembly is a full viewing angle backlight assembly, and the second viewing angle backlight assembly is a viewing angle suppression backlight assembly.

[0040] The embodiment simultaneously sets two sets of backlights in the same main frame, and limits the positional relationship, so as to form two independent light paths: the first backlight adopts the first light source assembly arranged on the side wall, and obtains the emission suitable for a large viewing angle through cavity light guide or diffusion; the viewing angle suppression member 320 is arranged on the light emitting side of the second backlight, so that the light of the path is limited before the light emitting surface, and a controlled viewing angle is obtained. Arranging the viewing angle suppression member 320 on the opposite light emitting side of the first backlight can avoid the occlusion or stray scattering of the main emission cone of the first backlight, and ensure that the two light paths do not interfere with each other and the boundary is clean.

[0041] The embodiment adopts the foregoing structure, and can realize physical decoupling of a wide viewing angle path and a controlled viewing angle path in the same device without introducing a movable mechanism. The corresponding backlight can be selectively enabled under different use requirements, and the contrast and uniformity before and after switching are more easily maintained. The viewing angle suppression member 320 only acts on the second backlight and is arranged to avoid the first backlight, which can reduce the risk of light path crosstalk and shielding and maintain sufficient emission of the first backlight. The side wall arrangement of the first light source assembly is combined with the clamping and bottom connection of the main frame, the assembly reference is clear, the structure is compact, the thickness and space utilization are more optimal, and the overall display stability and adaptability to shared viewing and private viewing scenes and user experience are improved.

[0042] As shown in Figure 3 In the embodiment, the first viewing angle backlight assembly further includes a first diffusion plate 220 and a reflective side film 230. The reflective side film 230 is arranged on three side walls of the diffusion plate in sequence. The first light source assembly is located on the side of the diffusion plate where the reflective side film 230 is arranged.

[0043] The first diffusion plate 220 is a light-emitting surface diffusion sheet of the first viewing angle backlight assembly, which is used to scatter the side-in light, uniform brightness, and reduce hot spots and graininess.

[0044] The reflective side film 230 is attached to the side of the diffusion plate, which is used to improve the reflectivity of the light source, thereby improving the brightness of the product.

[0045] The embodiment adds two parts, the first diffusion plate 220 and the reflective side film 230, to the first viewing angle backlight assembly. The first diffusion plate 220 is used to widen and uniformize the incident light from the first light source assembly, reduce the in-plane brightness fluctuation and graininess. The reflective side film 230 is a high-reflective film or white reflective material attached to the side of the diffusion plate. It is arranged on three side walls of the diffusion plate adjacent to each other, forming a side-in optical cavity with three closed sides and one open side. The first light source assembly is located on the side of the diffusion plate where the reflective side film 230 is not arranged, i.e., the open side, for smooth coupling of the side wall light source into the cavity. Through multiple cycles of three-side reflection and front diffusion, the embodiment improves the light utilization and expands the effective emission angle. At the same time, the open side faces the light source, avoiding the reflective side film 230 blocking the incident light or producing strong reflection glare spots, ensuring the coupling light efficiency and edge uniformity.

[0046] The first diffusion plate 220 can be made of PMMA or PC diffusion material, and the haze and thickness are selected according to the target OD and uniformity requirements. The reflective side film 230 can be a high-reflective white reflective film or a metalized reflective film, which is attached along the three adjacent sides of the diffusion plate. It can also form a continuous reflective cavity in cooperation with the high-reflective coating on the inner wall of the middle glue shell 113. To reduce stripes and dark corners, a micro-texture or a secondary small haze sheet can be added near the open side to transition the coupling light hot spots.

[0047] The combination of the aforementioned three-side reflection and front diffusion significantly improves the luminous utilization ratio and central brightness of the first-view-angle backlight, suppresses the edge dark angle and stripes, and obtains a wider viewable angle and higher in-plane uniformity; the division of the light source on the opening side and the reflective side film 230 on the non-opening side reduces invalid scattering and light leakage, which helps to balance brightness and uniformity under limited OD conditions; the overall provides a more stable, bright and uniform backlight basis for the full-view-angle path in the dual-view-angle scheme, thereby improving the overall display quality and user viewing experience without increasing the movable mechanism.

[0048] The display device of the embodiment further includes a double-sided adhesive tape fixed to the inner rubber frame 112, which is then adhered and fixed to the bottom surface of the lower frame 114. It also includes a reflective film component 122 attached to the inner side wall of the inner rubber frame 112 to improve the reflectivity of light, which can improve the brightness of the product.

[0049] In the embodiment, the first-view-angle backlight assembly further includes a light-reflecting strip 240 arranged on the peripheral wall of the middle rubber shell 113.

[0050] The embodiment adds a light-reflecting strip 240 to the first-view-angle backlight assembly. The light-reflecting strip 240 is a linear high-reflectivity material attached to the peripheral wall of the middle rubber shell 113, which is used to reflect the oblique light hitting the side wall of the shell back into the backlight cavity. The peripheral wall of the middle rubber shell 113 refers to the circumferential exposed side wall area around the backlight cavity. A circumferential high-reflectivity boundary is formed outside the light-in path of the side-in backlight, which, together with the first diffusion plate 220 and the reflective side film 230, forms a more complete optical recycling channel: when the light hits the side wall of the shell after diffusion, it is efficiently folded back by the light-reflecting strip 240, reducing side wall light absorption and light leakage, thereby stabilizing brightness and uniformity. When installing, the light-reflecting strip 240 can be attached to the wall of the middle rubber shell 113 to improve the reflectivity of the light source, thereby avoiding the light absorption of the black middle rubber shell 113 and causing a loss of product brightness, thereby achieving the effect of improving product brightness. Therefore, the use of the foregoing structure can improve the luminous utilization ratio of the side-in backlight, reduce the brightness loss caused by light absorption of the black shell, reduce the edge dark angle and stripes, and improve the in-plane uniformity and picture purity; under a given OD, a higher central brightness can be obtained, allowing the driving current to be reduced to reduce power consumption and heat generation, and improving long-term stability; at the same time, it shields the circumferential light leakage and improves the brightness fluctuation caused by assembly tolerance, providing a more stable, bright and uniform light output basis for the first-view-angle backlight.

[0051] In the embodiment, the first light source assembly includes a light bar 211 and a lampshade 212, the side wall of the lower frame 114 is provided with a convex, the side wall of the lampshade 212 is provided with a first buckle 2121, the lampshade 212 is buckled with the convex of the lower frame 114 through the first buckle 2121, and the light bar 211 is arranged on the inner side wall of the lampshade 212.

[0052] The light bar 211 is a linear LED light-emitting unit and its carrier plate, which provides lateral light; the lampshade 212 is a housing part surrounding a partial optical cavity, and the inner side of the side wall thereof is used for carrying the light bar 211, and the shape thereof cooperates with the main body frame to form a light inlet of the side-in backlight. The side wall of the lower frame 114 is provided with a convex, the side wall of the lampshade 212 is provided with a first buckle 2121, and the two are buckled to complete the rapid positioning of the lampshade 212 relative to the lower frame 114 and the limiting and fixing in the third direction (the light-out direction); the light bar 211 is arranged on the inner side wall of the lampshade 212, avoiding occupying the effective height of the cavity and shortening the light coupling path, so that the light smoothly enters the backlight cavity from the light-in side. In the embodiment, the linear light source is stably integrated in the side wall direction through the cooperation of the convex of the lower frame 114 and the first buckle 2121 of the lampshade 212, and the light-in opening is simultaneously made to face the diffusion area, thereby establishing an efficient side-in light path.

[0053] The foregoing structure buckles to be fixed, so that the lampshade 212 and the lower frame 114 form a stable assembly reference, the assembly efficiency is high, the repeated positioning accuracy is good, and the fasteners and the thickness occupation are reduced; the light bar 211 is attached to the inner side wall of the lampshade 212, which can shorten the light-in and light-mixing distance, reduce the edge dark angle and the stripe, improve the in-plane uniformity and the center brightness; the reliable locking cooperation of the lampshade 212 and the lower frame 114 suppresses the gap light leakage and displacement, and improves the stability of the whole machine under the vibration working condition; the overall structure is compact, which is conducive to realizing the high-brightness full-view backlight under the limited OD condition, and providing an efficient, uniform and easy-to-maintain light source integration mode for the first view path in the double-view device.

[0054] In specific implementation, the buckle position on the side wall of the middle plastic shell 113 is buckled on the convex on the side wall of the lower frame and the buckle on the side wall of the lampshade 212, so as to realize the buckling and fixing of the middle plastic shell 113 on the side wall of the lower frame and the lampshade 212.

[0055] In the embodiment, the buckle position on the side wall of the middle plastic shell 113 is buckled on the buckle on the side wall of the lampshade 212 and the convex on the side wall of the lower frame, so as to realize the fixing of the middle plastic shell 113 on the lampshade 212 and the lower frame, and realize the third direction limiting and fixing of the middle plastic shell 113. The third direction is the light-out direction.

[0056] In the embodiment, the buckle on the side wall of the lampshade 212 is buckled on the convex on the side wall of the lower frame, so as to realize the buckling and fixing of the lampshade 212 on the side wall of the lower frame.

[0057] The upper glue shell 111 is provided with three buckles on each side wall of the two short sides, and is provided with five buckles and four buckles on the two long sides respectively; the upper glue shell 111 is buckled on the convex of the middle glue shell 113 to realize the third direction limiting and fixing of the upper glue shell 111.

[0058] In the specific implementation, the buckle position on the side wall of the upper glue shell 111 can be buckled and fixed on the convex on the side wall of the middle glue shell 113 to realize the buckling and fixing of the upper glue shell 111 on the middle glue shell 113; then the buckle position on the side wall of the middle glue shell 113 is buckled and fixed on the buckle on the side wall of the lampshade 212 and the convex on the side wall of the lower frame to realize the fixing of the middle glue shell 113 on the lampshade 212 and the lower frame; the inner glue frame 112 is fixed and adhered to the bottom surface of the lower frame by the double-sided adhesive; the lampshade 212 is fixed and adhered to the bottom surface of the lower frame by a double-sided adhesive, and then the buckle on the side wall of the lampshade 212 is buckled and fixed on the convex on the side wall of the lower frame. Thus, the upper glue shell 111, the middle glue shell 113, the inner glue frame 112 and the middle iron frame are stably fixed to avoid the shaking and abnormal sound of the product during transportation and work.

[0059] The lampshade 212 is adhered and fixed to the back surface of the lower frame 114 by a double-sided adhesive, and then the buckle on the side wall of the lampshade 212 is buckled and fixed on the convex on the side wall of the lower frame, and then the side wall of the lampshade 212 is inserted into the hole slot on the inner wall of the middle glue shell 113, and the buckle position on the side wall of the middle glue shell 113 is buckled and fixed on the lower frame and the lampshade 212 to make the lampshade 212, the lower frame and the middle glue shell 113 form an integral whole; the lamp strip 211 is attached to the side wall of the lampshade 212 to form a light source of the full-view display screen, and provides a light source for the display of the full-view display screen.

[0060] As shown in Figure 4 In the embodiment, the second light source assembly further includes a second diffusion plate 330, a light diffusion film 340, a red-green filter film 350, a fluorescent film 360, a lower light enhancement film 370 and a middle light enhancement film 380 which are sequentially stacked in the light output direction, and the viewing angle suppression member 320 is located on the light output side of the middle light enhancement film 380.

[0061] Wherein the second diffusion plate 330 is used to homogenize the near-field particles and bright spots of the direct light source once; the light diffusion film 340 further scatters the local interference and periodic lines under low haze conditions to reduce the moire risk; the red-green filter film 350 is used to shape the spectrum, suppress the redundant peak value, and improve the purity and consistency of the target color gamut; the fluorescent film 360 converts the blue light part into the required white light or wide spectrum component to form a backlight source closer to the target chromaticity; the lower light enhancement film 370 and the middle light enhancement film 380 fold the light deviating from the normal line into the permitted visual cone to improve the normal view brightness and energy efficiency. The view angle suppression member 320 is arranged on the light emitting side of the middle light enhancement film 380, and performs the last angle gating on the light beam that has been condensed by the light enhancement film, so that a narrower visual angle can be obtained with a smaller brightness penalty. The two layers of light enhancement films complete the brightness recovery in the front stage, so that the privacy angle limit does not have to be at the expense of a large transmittance loss, thereby maintaining a high central brightness and contrast under a narrow visual cone; the combination of the red-green filter film 350 and the fluorescent film 360 improves the color gamut and chromaticity consistency, and the second diffusion plate 330 and the light diffusion film 340 suppress the particle feeling and the stripe, so that the overall light emission is uniform, pure and high-contrast under short OD conditions, providing a high-quality visual angle suppression mode for the dual visual angle device while considering the energy efficiency and privacy.

[0062] In the embodiment, the top of the side wall of the inner rubber frame 112 is provided with a plurality of diaphragm positioning columns 391 and a three-stage stepped boss 392, the view angle suppression member 320 is a privacy film, the privacy film, the second diffusion plate 330, the light diffusion film 340, the red-green filter film 350, the fluorescent film 360, the lower light enhancement film 370 and the middle light enhancement film 380 are connected with the three-stage stepped boss 392, and the privacy film, the second diffusion plate 330, the light diffusion film 340, the red-green filter film 350, the fluorescent film 360, the lower light enhancement film 370 and the middle light enhancement film 380 are provided with positioning lugs 393 and / or positioning grooves 394, and the positioning columns pass through the positioning lugs 393 and / or the positioning grooves 394.

[0063] The diaphragm positioning column 391 is a vertical limiting column formed at the top of the side wall of the inner rubber frame 112, which is used to pass through the opening at the edge of each optical diaphragm to realize in-plane (X / Y) positioning and anti-slip.

[0064] The three-stage stepped boss 392 is a stepped supporting surface formed along the top periphery of the inner rubber frame 112, which has three preset heights away from the light emitting surface, and is used to provide layered support and light emitting direction (Z direction reference) for diaphragms with different thicknesses and functions; the positioning lug 393 or the positioning groove 394 is a matching structure opened at the edge of the diaphragm, which cooperates with the positioning column to realize quick introduction, limiting and thermal expansion convergence.

[0065] The privacy film, the second diffusion plate 330, the diffuser film 340, the red-green filter film 350, the fluorescent film 360, the lower light enhancement film 370 and the middle light enhancement film 380 are sequentially stacked in the light emitting direction and connected with the three-stage stepped boss 392, the edge opening of each film is passed through the positioning column, so that the reference alignment in X / Y direction and the step support in Z direction are obtained at the same time; the light emitting side of the middle light enhancement film 380 is further stacked with the privacy film, forming a light emitting path of gain first and angle limiting later.

[0066] The privacy film and the lower light enhancement film 370 are fixed and bonded by the film fixing glue 395. In this embodiment, a plurality of film positioning columns 391 can be arranged on the top of the side wall of the inner glue frame 112, which is used for limiting and fixing the optical film.

[0067] The privacy film, the second diffusion plate 330, the diffuser film 340, the red-green filter film 350, the fluorescent film 360, the lower light enhancement film 370 and the middle light enhancement film 380 are sequentially stacked in the light emitting direction and connected with the three-stage stepped boss 392, the edge opening of each film is passed through the positioning column, so that the reference alignment in X / Y direction and the step support in Z direction are obtained at the same time; the light emitting side of the middle light enhancement film 380 is further stacked with the privacy film, forming a light emitting path of gain first and angle limiting later.

[0068] In this embodiment, rigid alignment is completed in the plane by positioning columns and clamps or positioning grooves 394, which prevents the film from being misaligned, slipping and wrinkling under vibration and temperature and humidity changes, stabilizes the in-plane uniformity and reduces stripes, moire and ghost; the thickness direction accurately controls the relative height and air gap of each layer through three-stage steps, ensures the consistency of light enhancement and angle limiting cooperation, improves the on-axis brightness and contrast; the edge is supported by the boss and cooperates with the extinction / gel island design, reduces the side light leakage and secondary reflection, and improves the picture purity; the assembly relies on self-alignment and limiting, has short rhythm, high yield, is convenient for rework and maintenance, and enhances the reliability and consistency of the view angle channel under long-term vehicle working conditions.

[0069] As Figure 5As shown, in the present embodiment, the second light source assembly includes a lamp plate 311, the front surface of the lamp plate 311 is provided with a plurality of flip blue light miniLED chips 3111, the back surface of the lamp plate 311 is provided with a control circuit, the control circuit includes a plurality of IC chips 3113, the control circuit is connected with the flip blue light miniLED chip 3111, the surface of the lamp plate 311 is provided with a transparent protective glue covering the flip blue light miniLED chip 3111, and the front surface and the back surface of the lamp plate 311 are provided with white high-reflectance ink, wherein the high-reflectance ink refers to ink with a reflectance greater than 90%.

[0070] The viewing angle suppression display device in the present embodiment can adopt a COB+DOB mode in the light source and control circuit part, the flip blue light miniLED chip is pasted on the front surface of the lamp plate 311, and the IC (8), connector and various components are designed on the back surface of the lamp plate 311; the IC component adjusts the output signal according to the input signal, so as to realize the partition driving control display, and the duty cycle can be adjusted by pulse width modulation to adjust the brightness of the LED. Since the blue light miniLED chip used in the present embodiment has a relatively small chip structure, more detailed partition control display can be realized; the present embodiment can realize 2400 partition display (one lamp per partition), each partition can be controlled independently, so as to realize higher dynamic range (HDR) display and higher contrast display effect. The viewing angle suppression display screen of the present embodiment adopts miniLED combined with partition dimming technology, according to the bright and dark fields of the picture in the backlight module signal, realizes real-time control of the switching and brightness adjustment of the corresponding backlight area, so that the black in the picture is darker and the white is whiter, realizing high-contrast display, so that the color displayed by the backlight module is more natural and bright, and the visual reality gives people the best experience of being in the scene. The viewing angle suppression display screen adopts flip blue light miniLED chip 3111, shortens the optical mixing distance, so that the viewing angle suppression screen realizes pitch=3.65*3.65mm, OD=2.5mm without dark grid, and the display quality is excellent; by reducing the OD value of the product, the overall thickness of the product is achieved. In addition, since the flip bare chip miniLED is used in the viewing angle suppression display of the present embodiment, there is no packaging protection, therefore, the flip chip miniLED is bound on the PCB board, then a layer of 0.3mm thick transparent protective glue is molded on the surface of the flip chip lamp by using the whole surface molding process, the flip bare chip miniLED is protected, the corrosion of the flip bare chip lamp caused by water vapor and other factors in the external environment is avoided, so as to avoid the direct exposure of the miniLED in the environment, thereby protecting the miniLED, improving the service life of the miniLED and the reliability of the lamp plate 311.

[0071] The embodiment can also be provided with L-shaped anti-loosening silica gel 1142 at adjacent two corner points of the lower frame 114, which abuts against two adjacent sides of the corner point.

[0072] As shown in Figure 1 and Figure 7 The lower frame 114 is provided with heat-conducting glue 1143 on the side facing the lamp panel 311, conductive double-sided adhesive 1144 is arranged between adjacent heat-conducting glue 1143, insulating glue 1145 is arranged in the area surrounded by the heat-conducting glue 1143, and edge sealing glue 1146 is arranged on the edge of the lower frame 114.

[0073] The embodiment is provided with one L-shaped anti-loosening silica gel 1142 at each corner of the lower frame 114, and the corresponding corners of the inner glue frame 112 are designed to avoid; the L-shaped anti-loosening silica gel 1142 is used for interference fit with the diffusion plate to prevent loosening and jumping of the diffusion plate during transportation and work.

[0074] The L-shaped anti-loosening silica gel 1142 is arranged at adjacent two corner points of the lower frame 114 and abuts against two adjacent sides of the corner point, which is used as a corner pre-pressing and limiting piece to suppress loosening and displacement of the optical piece or the inner glue frame 112 under vibration and temperature and humidity cycles; the side of the lower frame 114 facing the lamp panel 311 is sequentially functionally divided: the heat-conducting glue 1143 is used as a main heat-conducting channel to conduct the heat generated by the lamp panel 311 to the lower frame 114; the conductive double-sided adhesive 1144 is arranged between adjacent heat-conducting glue 1143 to provide electrical conduction and reflow path; the insulating glue 1145 is filled inside the area surrounded by the heat-conducting glue 1143 to form electrical isolation and creepage distance protection; the edge sealing glue 1146 is arranged circumferentially on the edge of the lower frame 114 to play the role of edge sealing, light shielding, dustproof and anti-seepage. Through the mechanical pre-pressing of the corner points and the cooperation of the four types of functional pieces of heat conduction, electrical conduction, insulation and edge sealing on the side facing the lamp panel 311, the integrated design of assembly stability, heat dissipation, grounding and environmental protection is completed.

[0075] As shown in Figure 6 In the embodiment, the four corners and / or edges of the back of the lamp panel 311 are provided with a plurality of copper exposure areas 312.

[0076] The four corners and edges of the back of the lamp panel 311 in the embodiment are designed to have copper exposure areas 312 to play the role of grounding, and the arrangement of the aforementioned copper exposure areas 312 also has the following effects:

[0077] I. Stabilize the circuit potential: form a common reference potential through grounding to ensure that there is no potential difference between the circuits of each unit, and maintain the stability of the entire lamp panel 311 driving system.

[0078] II. Inhibit the effect of electromagnetic interference: Design the exposed copper grounding on the back of the PCB lamp panel 311 to form an electromagnetic shielding layer to block external electromagnetic interference from entering the circuit and causing interference to the partition light adjustment (partition light adjustment) partition driving control display.

[0079] III. Bleed static electricity effect: Design the exposed copper area 312 on the back of the PCB lamp panel 311 to ground to provide a quick discharge channel for static induction charges, preventing static electricity from damaging the miniLED chips on the lamp panel 311, thereby causing the partition light adjustment lamp panel 311 to be unable to normally drive the partition display.

[0080] IV. Lightning and electric shock prevention effect: The exposed copper area 312 grounding design will guide the lightning induction current into the ground, avoiding damage to the miniLED lamp panel 311 caused by lightning and electric shock.

[0081] V. Optimize signal transmission effect: The exposed copper area 312 design makes the miniLED lamp panel 311 complete plane impedance reduction, reduces signal reflection and attenuation; to realize high-frequency signal display, so that the partition light adjustment backlight realizes higher refresh rate display, and makes the dynamic display more realistic.

[0082] VI. Improve heat dissipation efficiency: The large-area exposed copper area 312 on the back of the lamp panel 311 is grounded to conduct heat and assist in heat dissipation, improving the heat dissipation performance of the miniLED lamp panel 311 when working, and ultimately improving the overall service life and reliability of the partition light adjustment backlight.

[0083] Embodiment 2

[0084] The embodiment also provides a dual-view miniLED vehicle-mounted display device control method, which is used for controlling the dual-view miniLED vehicle-mounted display device of the first aspect, and includes the following steps:

[0085] S1: Obtain a view angle display mode, the view angle display mode including a full view angle display and a suppressed view angle display mode;

[0086] The view angle display mode refers to the light output view angle setting of the device when displaying, including full view angle display and suppressed view angle display. The full view angle display is used for multi-person shared viewing, and the suppressed view angle display is used for limiting lateral visibility to protect privacy or reduce distraction. This step selects the appropriate light output strategy according to the current scene requirements, providing a prerequisite for subsequent backlight path and drive parameter generation. In practice, the mode can be obtained according to the user's selection in the central control interface, physical buttons or voice instructions, or the system can give mode suggestions according to the vehicle speed, parking state or application type. The system ensures stable mode determination through de-bouncing and state machine management, and records the time stamp when the mode changes to coordinate the subsequent switching timing, thereby realizing scene-adaptive human factor optimization, allowing the user to quickly switch between sharing and privacy, and laying the foundation for the system to balance between image quality, power consumption and safety.

[0087] S2: determining a target light source assembly for display from the first light source assembly and the second light source assembly according to the view angle display mode;

[0088] The target light source assembly refers to the backlight channel selected and actually lit in the current mode, specifically one of the first light source assembly or the second light source assembly. This embodiment avoids light path crosstalk and energy consumption superposition caused by simultaneous lighting by making exclusive selection between the two sets of backlights, ensuring that the output view angle characteristics are consistent with the selected mode. In practice, the control logic performs interlocking selection on the two channels, first closing the drive and power switch stage of the non-target channel, and then opening the target channel according to the preset order and soft start slope. The power-on delay, PWM duty cycle gradual change and current speed limit can be set to ensure that there is no flicker and current shock during the switching process, and the system can fall back to the safe default channel in case of abnormality. This can significantly reduce the risk of light leakage and edge light halo, reduce unnecessary power consumption and thermal load, and improve switching consistency and overall reliability.

[0089] S3: obtaining light source drive parameters according to image display information;

[0090] The image display information refers to the brightness distribution, average image brightness, contrast requirement, and color target of the current frame or multiple frames; and the light source driving parameter is a quantized control quantity required for driving the backlight, such as current setting, PWM duty ratio, partition gain, and boundary transition strategy. The embodiment maps the content requirement into an executable control quantity on the backlight side, to ensure that the target brightness, contrast, and color are still achieved at the selected viewing angle. To achieve this, the full-view mode can generate global current and PWM settings according to the average image brightness and ambient brightness curve, and make uniformity compensation for the edge region; in the viewing angle suppression mode, a partition dimming matrix can be generated on the second light source assembly according to the bright and dark fields of the image, and the compensation for the transmission loss caused by the privacy film and the angle gain correction of the light enhancement film are superimposed, and a transition kernel is executed on the high-contrast boundary to suppress the halo; in terms of color, the white point and gamut fine tuning can be performed in combination with the characteristics of the fluorescent and light filtering films. In different modes of the embodiment, stable peak brightness and black level performance can be obtained, the contrast and detail level are improved, and the energy efficiency and consistent viewing experience are taken into account.

[0091] S4: driving the target light source assembly to work according to the light source driving parameter.

[0092] Driving the target light source assembly to work refers to delivering the driving parameter to the corresponding power supply and IC of the channel to generate actual current and PWM waveform to light up the backlight. The embodiment can execute the control intention in a stable, low-noise, and flicker-free manner, and constrain the state such as temperature and voltage during operation to ensure reliability. To achieve this, the controller outputs the partition PWM or current setting at the frame synchronization rhythm, uses phase offset and frequency planning to reduce ripple and interference, uses ramp and speed limit for parameter change to avoid brightness sudden change; if necessary, trigger derating and protection in combination with temperature feedback or voltage monitoring, and keep consistent with the panel frame timing to reduce distortion and trailing, so as to obtain smooth brightness transition and stable picture display, avoid visible flicker and noise, control the electric heating and electromagnetic influence, and improve long-term reliability and user experience.

[0093] In the embodiment, the S3: obtaining the light source driving parameter according to the viewing angle display mode and the image display information comprises:

[0094] S31: generating a basic partition dimming matrix from the image brightness field;

[0095] The image brightness field refers to the brightness distribution of the current frame on the panel coordinates, which can be obtained from the linear brightness after the Y channel of the source content is inversely transformed by the panel Gamma, or the backlight reference layer derived by the rendering pipeline. The basic partition dimming matrix refers to a two-dimensional numerical table obtained by aggregating the image brightness of the current frame according to the partition grid (i, j) of the backlight. It reflects the initial instruction of how bright each backlight partition should be, which is usually generated by the weighted average or peak value of the pixels in the partition.

[0096] This step converts the continuous luminance information at pixel level into a partition level control quantity executable by the backlight, establishing a mapping relationship between the content and the backlight. In specific implementation, the luminance field can be regionally aggregated (such as weighted average, maximum value or peak value retention strategy) according to the partition grid, and edge protection (such as using upper quantile statistics for the grid containing fine line text) and ambient light compensation (increasing the global baseline under high ambient illumination) can be used in cooperation. The basic partition dimming matrix obtained in this way provides an initial energy distribution consistent with the content, avoiding the loss of details and compression of contrast caused by directly driving with the overall screen average.

[0097] S32: Angle compensation gain and duty upper limit constraint are applied to the partition dimming matrix based on the angle transmission curve of the privacy film and the directionality curve of the brightness enhancement film;

[0098] The angle transmission curve of the privacy film describes the transmission rate of light with the off-axis angle, and the directionality curve of the brightness enhancement film describes the gain difference of the prism film at different polar and azimuth angles. This step compensates for the directionality loss caused by the film stack, while the privacy viewing cone and the electrothermal boundary are protected by the duty upper limit constraint. In specific implementation, the comprehensive transmission rate is obtained by looking up the curve according to the equivalent angle of each partition relative to the observation direction, and higher compensation gain is allocated to partitions with low transmission, and the duty upper limit is lowered in areas close to the half cut-off angle; if necessary, global coefficients of overall power consumption and temperature rise are introduced for unified scaling. After this processing, the front view brightness and the white are corrected, and the edge viewing angle is not excessively brightened, so that the quality and privacy are considered in the suppression of the viewing angle mode.

[0099] S33: Each partition instruction is obtained by equal ratio normalization processing of the global with reference to the front view target white point or target peak brightness;

[0100] The front view target white point is the brightness or chroma reference that the system hopes to achieve in the normal direction, and the peak brightness is the highest backlight brightness allowed by the device under the current environmental and power consumption constraints. This step aims to unify the compensated and limited partition values to a unified brightness scale, avoiding overall brightness or darkness. In specific implementation, the deviation of the synthesized front view brightness of the current partition set from the target can be calculated, and a global scaling factor is obtained to scale all partitions equally; if there is a local peak limit, grouping normalization or histogram-based limiting normalization can be used. After normalization, the overall screen brightness is consistent with the target, and subsequent large-scale adjustment is no longer needed, reducing quantization error and subsequent fluctuations.

[0101] S34: The current partition instruction and the last frame instruction are fused through exponential time smoothing;

[0102] Temporal smoothing refers to low-pass filtering the instructions in the time axis. Exponential smoothing linearly combines the current frame and the previous frame with weights, which can be adapted to the scene. This step can suppress the inter-frame jitter and flicker caused by content changes, measurement noise or compensation, while maintaining the necessary response speed. In implementation, the smoothing coefficient can be adaptively set according to motion estimation, AEL (automatic brightness) change speed or scene type: a larger coefficient is used for static UI to stabilize, and a smaller coefficient is used for fast video or transition to adapt to fast scene conversion; a slope limit can also be set for large changes to prevent instantaneous transition. In this way, the display transition is smooth, there is no visible flicker, and the follow-up is maintained under dynamic content.

[0103] S35: applying spatial transition processing to the high-contrast partition boundary according to the fused partition instructions;

[0104] The high-contrast partition boundary is a region where the instructions of adjacent partitions differ significantly, which is prone to form halos, stripes or hard outlines under direct backlight. The purpose of this step is to smooth these sharp changes in the spatial domain, improve subjective uniformity and protect text and graphic edges. In implementation, bilateral filtering or edge-aware convolution with a small kernel size can be used, and transition is only enabled at grid boundaries where local contrast is detected to exceed a threshold; for text and UI elements, a direction-selective kernel can be used to weaken along the stroke direction and moderately transition perpendicular to the stroke direction. After processing, the light-dark junction is more natural, reducing the feeling of aperture and dirty screen, while maintaining the sharpness of key information.

[0105] S36: determining the duty cycle of current pulse width modulation for each partition according to the transition-processed partition instructions.

[0106] Quantization is the mapping of continuous partition instructions to discrete levels that the driving IC can accept, such as PWM duty cycle steps or current DAC levels. This step generates driving commands that meet the hardware interface specifications, have correct timing and controllable noise. In implementation, gamma pre-compensation can be performed before quantization to reduce the step feeling, and dithering or noise suppression strategies (such as minimum step and phase offset planning) can be executed after quantization, and the commands are issued in row blocks or groups to control current spikes and EMI; overcurrent or overtemperature is detected to trigger derating and safety mode. The final output commands not only meet the quality and stability, but also meet the electromagnetic and thermal design requirements of the whole machine, ensuring long-term reliable operation.

[0107] In the present embodiment, the S32: applying angle compensation gain and duty cycle upper limit constraint to the partition dimming matrix based on the angle transmission curve of the privacy film and the directional curve of the brightness enhancement film comprises:

[0108] S321: obtaining comprehensive directional transmission data according to the off-axis polar angle and azimuth angle of each backlight partition, and the angle transmission curve of the privacy film and the directional curve of the brightness enhancement film;

[0109] The axial polar angle and the azimuthal polar angle represent the inclination and the orientation of the observation direction with respect to the screen normal, respectively; the comprehensive directional transmittance is the light transmittance ratio of the combination of the privacy film and the brightness enhancement film under the observation direction. This step quantifies the actual light transmittance loss of each subzone under the current observation direction, and provides an accurate basis for subsequent compensation. In specific implementation, the system first determines the equivalent observation angle for each subzone according to the geometric relationship, and then finds the corresponding value from the privacy film angle transmittance curve and the brightness enhancement film directional transmittance curve, and obtains the comprehensive directional transmittance data of the subzone according to the established interpolation and combination rules; if necessary, the production calibration coefficient, assembly deviation and temperature compensation are superimposed to modify the data, and the range is cropped and the resolution is quantized. After such processing, the directional transmittance basic data consistent with the actual film stack can be obtained, which is stable and usable, and the subsequent compensation deviation caused by the difference in directionality is avoided.

[0110] S322: determining the angle compensation gain of each subzone according to the comprehensive directional transmittance data and the lower limit of the privacy divergence and the upper limit of the gain;

[0111] The angle compensation gain is an up-regulation coefficient allocated to the subzone to offset the directional transmittance loss; the lower limit of the privacy divergence and the upper limit of the gain are boundary parameters set to prevent numerical distortion and abnormal energy consumption. This step gives stronger compensation to the subzone with larger transmittance loss, but at the same time prevents excessive increase in the extreme low transmittance or boundary area. In specific implementation, the system first maps the comprehensive directional transmittance data to the basic gain, and then protects the extreme low transmittance according to the lower limit of the privacy divergence, and then clamps the basic gain with the preset upper limit of the gain; if the whole machine power consumption or temperature rise margin is insufficient, the gain of all or part of the subzones can be uniformly scaled, and the spatial correction and numerical smoothing can be performed in combination with the uniformity calibration table. The angle compensation gain obtained in this way can significantly restore the normal view brightness, and can maintain stability and reliability under the constraints of energy consumption and heat.

[0112] S323: compensating each subzone according to the basic subzone dimming matrix and the angle compensation gain of each subzone to obtain the compensated subzone dimming data;

[0113] The compensated subzone dimming data is the result of multiplying the basic subzone dimming matrix by the angle compensation gain according to the subzone. This step can convert the directional loss into backlight enhancement to restore the brightness and white balance in the normal view direction. In implementation, the controller applies the corresponding gain to the basic dimming value of each subzone to obtain the first compensation result; to suppress local overshoot, a small compression curve can be introduced before applying the gain for extremely bright or extremely dark scenes, or a small amount of speed limiting and neighborhood consistency check can be performed for abnormal jump regions after applying the gain. The compensation data generated in this way can maintain the content contrast while improving the central viewing experience under the viewing angle mode.

[0114] S324: Calculate the duty cycle upper limit of each partition according to the equivalent observation angle of each partition and the preset privacy viewing angle boundary requirement;

[0115] The duty cycle upper limit is the maximum brightness boundary that each partition can be driven, which is related to the privacy viewing angle boundary strategy and the electrical and thermal limits. This step is used to prevent the area near the viewing angle cutoff or the structural boundary from being lit due to compensation, thereby damaging the privacy effect or causing heat or EMI overruns. In specific implementation, the system sets a lower upper limit for the area near or beyond the cutoff angle based on the equivalent observation angle of the partition and the preset privacy cone curve; the upper limit of the heat-sensitive or power-sensitive area can be further adjusted down, and different upper limit levels can be set for different groups of areas. This constraint allows compensation to work only within the allowed angle range, maintaining the privacy viewing angle while ensuring the safety of the entire machine boundary.

[0116] S325: Perform zone-by-zone clipping processing according to the partition dimming data after secondary compensation and the duty cycle upper limit of each partition to obtain the clipped partition dimming data;

[0117] The clipped partition dimming data is the value obtained by comparing the first compensation result with the partition duty cycle upper limit and then clipping it zone by zone. This step strictly enforces privacy and electrical and thermal boundaries to ensure that no partition exceeds the allowed driving intensity. In specific implementation, the controller compares the compensation value of each partition with its upper limit, and if it exceeds, it is pressed back to the upper limit; to avoid the abruptness of the boundary caused by clipping, a small amount of smoothing or transition processing can be performed on the partition where clipping occurs and its adjacent partitions. After clipping and trimming, the partition instructions are controlled as a whole and the boundary is smooth, avoiding the leakage of light and local heating caused by compensation.

[0118] S326: Perform global scaling on the clipped partition dimming data according to the overall energy consumption constraint parameters to obtain partition dimming data that meets the energy consumption constraint.

[0119] Global scaling refers to adjusting all partition dimming values by a uniform proportion without changing the relative relationship between partitions, in order to meet the overall energy consumption or temperature rise constraint. This step can prevent the system from entering protection or causing noise and EMI problems due to excessive overall driving when the remaining power consumption or thermal margin is limited. In specific implementation, the system real-time aggregates the energy consumption estimate or temperature rise prediction of the current partition instructions, compares it with the constraint threshold, and if it exceeds, calculates a global scaling coefficient to reduce all partitions simultaneously; after meeting the constraint, the coefficient can be recorded and fed back for adaptive initial setting in subsequent frames. In this way, both image quality and system safety can be considered, so that the viewing angle suppression mode can maintain stable and sustainable operation under different working conditions.

[0120] In this embodiment, the S321: obtaining comprehensive directional transmission data according to the off-axis polar angle and azimuth angle of each backlight partition and the angle of view curve of the privacy film and the directional curve of the brightness enhancement film comprises:

[0121] S3211: Obtain the off-axis polar angle and azimuth angle of each backlight partition;

[0122] The off-axis polar angle represents the inclination of the observation direction relative to the screen normal, and the azimuth angle represents the orientation in the screen plane (such as the horizontal or vertical direction). This step determines the spatial pointing parameters of each partition relative to the observation point (such as the nominal eye point of the driver's seat), which are used as inputs for compensation. In specific implementation, the off-axis polar angle can be obtained by calculating the angle between the line connecting the center coordinates of the partition and the observation point coordinates and the normal in the screen coordinate system, and the azimuth angle can be calculated by the projection direction of the vector in the screen plane; if the device has an installation pitch or the driver's seat is offset, the observation point is first converted to the screen coordinates using rigid transformation. This step ensures that each partition has stable and repeatable angular descriptions.

[0123] S3212: Interpolate the off-axis polar angle in the privacy film angle transmittance curve to obtain the privacy film directional transmittance data of the partition;

[0124] The privacy film angle transmittance curve describes the transmittance as a function of the off-axis polar angle, reflecting the light suppression rules of the privacy structure for different inclination angles. This step maps the off-axis polar angle of the partition to the corresponding privacy transmittance value, which quantifies the angular loss of the film for the partition. In specific implementation, the system reads the pre-calibrated transmittance curve table, performs linear or spline interpolation based on the off-axis polar angle of the partition, and if necessary, performs boundary extrapolation and trimming for angles outside the measurement range, and can superimpose temperature or aging correction coefficients. The privacy film directional transmittance data obtained in this way can accurately reflect the privacy angle limiting characteristics, providing a reliable basis for subsequent gain compensation and limiting.

[0125] S3213: Interpolate the off-axis polar angle and azimuth angle in the brightness enhancement film directional curve to obtain the brightness enhancement film directional transmittance data of the partition;

[0126] The brightness enhancement film directional curve depicts the gain or loss of the micro-prism film for different off-axis polar angles and azimuth angles (usually with significant differences between the horizontal and vertical directions). This step maps the off-axis polar angle and azimuth angle of the partition to the effective transmittance or gain of the brightness enhancement film in that direction, thereby capturing the anisotropy of the film stack. In specific implementation, the system reads the two-dimensional directional curve or the orthogonal one-dimensional curve pair, and performs interpolation based on the polar angle and azimuth angle of the partition; if two layers of orthogonal brightness enhancement films are used, the responses in the two directions are first calculated and then combined according to the process rules, with slight correction for manufacturing deviations. The brightness enhancement film directional transmittance data obtained in this way can truly reflect the directional convergence and brightness recovery effect, avoiding errors caused by a single angle model.

[0127] S3214: Fuse the privacy film directional transmittance data and the brightness enhancement film directional transmittance data to obtain the directional transmittance data of the partition;

[0128] The directional transmission data is the comprehensive light transmission ratio of the sub-area after the joint action of the two types of films in the current observation direction. This step combines the effects of privacy suppression and brightness collection into a single index for subsequent gain calculation and constraint setting. In specific implementation, the two directional data are fused according to the optical series relationship, and in specific implementation, the combination of equivalent light transmission ratios is used for fusion, and empirical correction or calibration coefficient is applied according to factors such as film layer stacking order, interface reflection and scattering; for abnormal values or noise, a robust fusion strategy can be used to avoid local spikes. The fused directional transmission data can reflect the film stack effect as a whole, so that the subsequent compensation is neither excessive nor conservative.

[0129] S3215: Range clipping and resolution quantization processing are performed on the directional transmission data to obtain comprehensive directional transmission data.

[0130] Range clipping is used to limit the directional transmission data within the credible physical and measurement interval, and resolution quantization is used to match the numerical bit width and table accuracy of embedded implementation. This step outputs comprehensive directional transmission data that is numerically stable and implementable, avoiding subsequent calculation divergence or jitter. In specific implementation, the upper and lower limits are clipped for excessively low or high transmission values, and the continuous values are quantized according to the system set bit width, which can be implemented by fixed-point or segmented LUT indexing, and can be cached as a mapping table of sub-area index and transmission value for subsequent fast access. The comprehensive directional transmission data after clipping and quantization not only ensures physical reasonableness, but also facilitates real-time calculation and long-term stable operation.

[0131] In this embodiment, the S322: determining the angle compensation gain of each sub-area according to the comprehensive directional transmission data and the anti-divergence lower limit and gain upper limit parameters comprises:

[0132] S3221: Obtain the anti-divergence lower limit parameter, the gain upper limit parameter and the abnormal value processing mode;

[0133] The anti-divergence lower limit parameter is used to limit the minimum reference value of gain calculation in the case of extremely low transmission, the gain upper limit parameter is used to limit the maximum improvement ratio that a single sub-area can give, and the abnormal value processing mode is used to handle abnormal data points such as sampling noise, table out-of-bound or instantaneous jump. This embodiment establishes numerical safety boundaries and abnormal processing in advance to provide stable constraint conditions for subsequent gain calculation. In implementation, the above parameters are obtained by prior calibration, and different gears can also be selected according to vehicle type, power consumption, temperature rise and EMC target; at the same time, out-of-bound clipping, missing measurement fallback, outlier limiting and time de-bouncing processing rules are loaded. After this step is completed, the system can determine a unified boundary and fault handling baseline to avoid divergence or jitter of subsequent gain in extreme data.

[0134] S3222: Determine the base angle compensation gain of each zone according to the integrated directional transmission data;

[0135] The base angle compensation gain refers to the first round gain coefficient calculated only according to the directional transmission loss. This step converts the optical direction difference into a promotion ratio that can be executed by the zone. In specific implementation, the integrated directional transmission data of each zone is read first, a monotonically increasing gain mapping table or a segmented function is used to generate the base gain, and different mapping curves can be set for different azimuth angles to fit the anisotropy of the light enhancement film. The base gain obtained in this way can quickly and interpretably reflect the energy loss caused by the film stack.

[0136] S3223: Perform lower limit protection processing on the base angle compensation gain;

[0137] The lower limit protection refers to preventing the base gain from being pushed to be too large to cause energy consumption, heat or glare risk when the transmission is extremely low or the data is uncertain. This step can reasonably suppress potential numerical divergence. In specific implementation, a minimum reference transmission and a minimum effective gain can be set, and when the input is below the credible threshold, a conservative value or interpolation fallback is used; for transient abnormalities, time de-bouncing or short-time maintaining the last frame value can be superimposed. After lower limit protection, the gain calculation is more robust to abnormal and extreme working conditions, avoiding overcompensation.

[0138] S3224: Perform upper limit clipping on the base angle compensation gain;

[0139] The upper limit clipping is used to limit the maximum promotion amplitude of a single zone to prevent the occurrence of situations such as privacy cone destruction, local hot spot or EMI rise caused by overcompensation. This step implements system-level constraints in a hard boundary manner. In specific implementation, the upper limit gear can be configured according to the vehicle type and power consumption budget, and the upper limit can be further tightened in the vicinity of the cutoff angle region according to the equivalent observation angle; for regions that frequently trigger amplitude limiting in history, a learning type upper limit can be automatically downshifted. The upper limit clipping ensures that the gain does not exceed the limit in any case, making the subsequent energy consumption allocation and image quality performance controllable.

[0140] S3225: Group scaling of the angle compensation gain of each zone according to the constraints of the overall power consumption and temperature rise margin;

[0141] Group scaling refers to uniformly reducing the gain of certain functions or spaces when the global power consumption or temperature rise is close to the threshold, thereby realizing prioritized energy allocation. This embodiment can meet system constraints without sacrificing the key area perception. The implementation can divide the zones into multiple groups according to functions (such as driving vision priority), positions (heat-sensitive areas), or dynamic states (high-frequency change areas), calculate a scaling coefficient for each group; when the power consumption / temperature rise alarm is triggered, the low-priority group is preferentially scaled, and the gain of the key group is preserved. Group scaling improves the efficiency of perception allocation under limited resources and avoids overall dimming.

[0142] S3226: Spatial correction of each partition angle compensation gain according to uniformity spatial correction coefficient;

[0143] The uniformity spatial correction coefficient can be obtained by prior calibration of in-plane luminance or chrominance, which is used to offset the in-plane non-uniformity caused by manufacturing and assembly differences. This step can make the same content present consistent visual response in different areas. In implementation, the gain is multiplied by the corresponding spatial correction coefficient or corrected according to a lookup table, and special coefficients can be set for edge and structural shielding areas; for models with obvious temperature drift, temperature interval segmented coefficients can be loaded. After spatial correction, the luminance and whiteness of the partitions are more consistent, reducing the risk of stripes and cloud spots.

[0144] S3227: Numerical smoothing and step length limit processing of each partition angle compensation gain;

[0145] Numerical smoothing is a low-pass processing in time, and step length limit processing restricts the maximum change amplitude of inter-frame gain. This step is used to suppress jitter and flicker caused by content, measurement or numerical quantization, while maintaining the necessary response speed. In implementation, exponential smoothing or adaptive smoothing can be used, and a ramp speed limit is set for large changes; stronger smoothing is used in static areas containing text or UI, and the step length is relaxed in fast video areas. After this processing, the gain changes more smoothly, and the user is more stable and has no jumping feeling subjectively.

[0146] S3228: Quantization processing of the processed each partition angle compensation gain according to the driving resolution.

[0147] Quantization processing is to map continuous gain values to discrete levels (such as duty step) recognizable by the driving IC, and to ensure compatibility with communication format and timing. This step reliably lands the algorithm results into hardware executable instructions. In implementation, gamma or logarithmic pre-compensation can be done first to reduce the step feeling, then quantization is performed according to the target bit width and micro-jitter or code word reuse strategy is added, and finally the quantization error is statistically monitored to optimize the lookup table. After quantization is completed, the gain table can be stably issued, which reduces visible noise and ripple, and meets the EMC and power consumption control requirements.

[0148] In the embodiment, the method further comprises:

[0149] S51: When mode switching between full-view display and view angle suppression display modes, the equivalent luminance of the source backlight channel and the target backlight channel in the normal view direction at the switching time is obtained, and the source channel normal view luminance and the target channel normal view luminance are obtained respectively;

[0150] Direct view equivalent luminance refers to the luminance value actually provided by the backlight channel in the direction of the screen normal (the direct view direction of the driver), considering factors such as zoning instructions, angle compensation, film stack directionality, and panel optical efficiency. This step first establishes a cross-fading measurement baseline. In specific implementation, the luminance of the two channels can be synthesized based on the generated zoning instructions and the pre-stored optical transmission lookup table: the zoning duty cycle is summed according to the direct view direction weight to obtain the channel-level luminance; if a sensor or a calibrated white point / peak value mapping is available, a more accurate value can be obtained by looking up the table.

[0151] S52: Obtain an equal-brightness reference luminance according to the direct view luminance of the source channel before switching and / or the direct view luminance of the target channel after switching;

[0152] The equal-brightness reference luminance is used to define the target luminance that needs to be maintained during the cross period (the period when the two viewing angle modes are switched). The direct view luminance of the source channel before switching, the direct view luminance of the target channel after switching, or a weighted combination of the two (such as initially favoring the source and gradually favoring the target later) can be taken. This step first determines the control target of cross-fading, so that the superimposed luminance remains stable throughout the switching process and avoids visual discontinuity. In implementation, the strategy can be selected according to the application scenario: instrument / navigation priority stability (commonly taking the source luminance), entertainment / highlight scene priority target (can take the target luminance), or dynamically adjusting the weight curve according to vehicle speed and ambient light. After determining the equal-brightness reference, the cross control has a clear tracking object.

[0153] S53: Obtain the synthesized direct view luminance after cross superposition according to the current cross coefficient, and compare it with the equal-brightness reference luminance to obtain a luminance error;

[0154] If switching from full viewing angle to suppressed viewing angle: the cross coefficient starts near zero. If switching from suppressed viewing angle to full viewing angle: the starting value is close to one. If the last switch was interrupted, the cross coefficient is restored from the last saved value.

[0155] Synthesized direct view luminance refers to the direct view direction luminance produced by the superposition of source channel fading and target channel fading under the current cross coefficient. The synthesized luminance is obtained by linearly weighting the direct view luminances of the two channels with the current cross coefficient, and then compared with the equal-brightness reference luminance to obtain a luminance error.

[0156] S54: Update the cross coefficient by proportional or proportional-integral adjustment according to the luminance error and perform interval constraint processing on it;

[0157] The cross coefficient represents the proportion of the target channel in the synthesized brightness, which gradually increases from 0 to 1 to complete the cross. In specific implementation, a proportional or proportional-integral regulator can be used: the cross coefficient increases when the error is positive, and decreases when the error is negative; to avoid integral saturation, an anti-windup and dead zone can be added; then the coefficient is limited between 0 and 1, and a fallback or freeze strategy is executed in abnormal situations. The updated cross coefficient can quickly converge and prevent unstable oscillation, ensuring a smooth and controllable switching process.

[0158] S55: Step-up upper limit and ramp speed limit constraints are imposed on single-frame changes in the cross coefficient.

[0159] The step-up upper limit limits the maximum change of the cross coefficient per frame, and the ramp speed limit limits the change rate over a longer time window. In specific implementation, a default step-up upper limit can be set according to the scene (e.g., no more than a certain percentage per frame), and further tightened in dark environments and high-contrast UI scenes; at the same time, an S-shaped ramp or piecewise linear speed limit is imposed to make the start and end stages smoother; through this limitation, the switching process is continuous and smooth in subjective perception, and can effectively avoid the reliability risks caused by instantaneous peaks.

[0160] The embodiment further includes, after the S32: based on the angle transmission curve of the privacy film and the brightness enhancement film directionality curve, imposing angle compensation gain and duty upper limit constraints on the partition dimming matrix:

[0161] S3201: According to the duty ratio of each partition and the spatial adjacency relationship, an initial phase grouping and a phase table are generated;

[0162] The phase grouping refers to dividing a number of backlight partitions into different switching phases to stagger the synchronous conduction; the phase table is a mapping table that records which phase each partition belongs to, the update order of the phase, and the timing parameters. Based on the duty ratio distribution after angle compensation and the spatial adjacency relationship, this step first gives an initial timing layout that satisfies high-duty dispersion and adjacent avoidance of the same phase, which can be classified by partition duty ratio (high, medium, low), and high-duty areas are preferentially and evenly distributed into different phases, and conflict constraints are imposed on physically adjacent or same-heat-zone partitions, and a greedy or binary clustering and graph coloring algorithm is used to generate a phase table; if the temporary load of a phase is too high, a reserved phase slot can be introduced. The initial phase table obtained in this way can reduce the synchronous current peak and local coupling risk without changing the optical command.

[0163] S3202: According to the phase statistics of each group, the concurrent current, power consumption, temperature rise, and electromagnetic radiation indicators are evaluated to obtain a phase budget evaluation result;

[0164] The concurrent current refers to the total current of the simultaneously turned-on partitions in the same phase; the power consumption and temperature rise respectively reflect the energy consumption and thermal load of the whole machine; and the electromagnetic radiation index is used for measuring the electromagnetic energy concentration brought by the time sequence switching. In the specific implementation, the partition duty cycle and current coefficient of each phase are summarized, the phase peak current and instantaneous power consumption are estimated, and the temperature rise and EMI budget occupation are obtained; the margin / overrun value of each phase is output, and the bottleneck type is marked.

[0165] S3203: obtaining a bottleneck phase and determining a partition set causing the overrun when the index of any phase overruns;

[0166] The bottleneck phase refers to the phase that overruns or has insufficient margin in any constraint dimension (current, power consumption, temperature rise, and EMI); and the critical partition set refers to a subset of key partitions (such as partitions with high duty cycle, spatial adjacency, or in a heat-sensitive area) that cause the phase to overrun. In the specific implementation, the partitions in the phase can be sorted according to the contribution degree (for example, sorted according to the value of partition current x coupling coefficient), and the first several partitions with cumulative contribution exceeding a threshold value are selected as the critical set; if EMI is the main bottleneck, the synchronization of the switching edges of the partitions and the coupling weight of the wiring also need to be considered. This positioning makes the subsequent rollback and migration more targeted and reduces the impact on key image areas.

[0167] S3204: performing duty cycle rollback and migrating idle phase processing on non-critical partitions in the bottleneck phase according to the priority and privacy perspective boundary to obtain a revised candidate phase table;

[0168] The duty cycle rollback refers to reducing the driving duty cycle of the partition by a certain percentage to reduce the concurrent load of the phase; and the phase migration refers to scheduling the partition to a phase with lighter load or more dispersed space. The purpose of this step is to preferentially adjust non-critical areas (far from the driving front center, non-text UI edge, close to the privacy cutoff angle, or higher redundancy area). In the implementation, the rollback objects are first determined according to the priority and privacy boundary, the duty cycle of the objects is adjusted by small steps, and whether the upper and lower limits of the duty cycle are crossed is detected; if the rollback is not enough to remove the bottleneck, part of the objects are migrated to the idle phase, while ensuring that no new adjacent conflict or EMI concentration occurs in the new phase; and the revised candidate phase table is formed after completion. Through rollback and migration, the peak value is effectively reduced while the key perception remains stable.

[0169] S3205: repeatedly performing the evaluation on the updated phase table until all phases meet the concurrent current, power consumption, temperature rise, and electromagnetic radiation constraints.

[0170] The closed loop re-evaluation means that the same budget evaluation as S3202 is performed again on the revised candidate phase table to determine whether the phase is still out of limit. The implementation process is: evaluation-if still out of limit, return to S3203 to reposition-continue small step back or incremental migration at S3204-re-evaluate, and increase the number of phase groups or reduce the phase concurrency as necessary; when all phases meet the constraints, freeze the phase table and enter the subsequent quantization and delivery. The closed loop feature ensures that the scheme can automatically find a balance point under different content, environment and working conditions, and achieve the comprehensive optimization of picture quality, human factors and system boundaries.

[0171] The above is only a specific implementation of the present application, and those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, module and unit can refer to the corresponding process in the foregoing method embodiments, which will not be described here. It should be understood that the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application.

Claims

1. A dual view mini LED vehicle display device, characterized in that, include: The main frame includes an upper rubber shell, an inner rubber frame, a middle rubber shell, and a lower frame. The middle rubber shell is snapped into the lower frame, the upper rubber shell is snapped into the middle rubber shell, and the inner rubber frame is connected to the bottom of the lower frame. A first-view backlight assembly includes a first light source assembly, which is disposed on an inner sidewall of the lower frame; The second-view backlight assembly includes a second light source assembly and a viewing angle suppression component, wherein the viewing angle suppression component is located on one side of the light emission direction of the second light source assembly. The viewing angle suppression component is located on the side of the first viewing angle backlight assembly opposite to the light emission direction.

2. The dual view mini LED vehicle display device of claim 1, wherein, The first viewing angle backlight assembly also includes a first diffuser plate and a reflective side film. The reflective side film is disposed on three sidewalls of the diffuser plate that are connected in sequence. The first light source assembly is located on the side of the diffuser plate where the reflective side film is not disposed. The first viewing angle backlight assembly also includes a reflective strip, which is disposed on the surface wall around the middle shell.

3. The dual view mini LED vehicle display device of claim 1, wherein, The first light source assembly includes a light strip and a lampshade. A protrusion is provided on the side wall of the lower frame, and a first buckle is provided on the side wall of the lampshade. The lampshade is engaged with the protrusion of the lower frame by the first buckle, and the light strip is provided on the inner side wall of the lampshade.

4. The dual view mini LED vehicle display device of any one of claims 1-3, wherein, The second light source assembly also includes a second diffuser plate, a scattering film, a red-green filter film, a fluorescent film, a lower brightness enhancement film, and a middle brightness enhancement film stacked sequentially along the light emission direction, with the viewing angle suppression component located on the light emission side of the middle brightness enhancement film.

5. The dual view mini LED vehicle display device of claim 4, wherein, The top of the inner frame sidewall is provided with several diaphragm positioning posts and a three-tiered stepped protrusion. The viewing angle suppression component is a privacy film. The privacy film, second diffuser plate, diffuser film, red-green filter film, fluorescent film, lower brightness enhancement film, and middle brightness enhancement film are connected to the three-tiered stepped protrusion. Positioning ears and / or positioning grooves are provided on the privacy film, second diffuser plate, diffuser film, red-green filter film, fluorescent film, lower brightness enhancement film, and middle brightness enhancement film. The positioning posts pass through the positioning ears and / or positioning grooves. The second light source assembly includes a lamp board. The front of the lamp board is provided with several flip-chip blue miniLED chips. The back of the lamp board is provided with a control circuit. The control circuit includes... The lamp board contains several IC chips, a control circuit, and flip-chip blue miniLED chips. A transparent protective adhesive covering the flip-chip blue miniLED chips is applied to the surface of the lamp board. White high-reflective ink is applied to the front and back of the lamp board. L-shaped anti-loosening silicone sealant is applied at two adjacent corners of the lower frame, abutting against the two adjacent sides of the corner. Thermally conductive adhesive is applied to the side of the lower frame facing the lamp board, conductive double-sided adhesive is applied between adjacent thermally conductive adhesives, insulating adhesive is applied within the area enclosed by the thermally conductive adhesive, and edge-sealing adhesive is applied to the edge of the lower frame. Several exposed copper areas are provided at the four corners and / or edges of the back of the lamp board.

6. The control method of the dual-view mini LED vehicle-mounted display device, characterized in that, The method for controlling the dual-view miniLED vehicle display device according to any one of claims 1 to 5 includes: S1: Obtain the viewing angle display mode, which includes full-view display and suppressed-view display mode; S2: determining a target light source assembly for display from the first light source assembly and the second light source assembly according to the view angle display mode; S3: obtaining light source driving parameters according to the view angle display mode and the image display information; S4: driving the target light source assembly to work according to the light source driving parameters. 7.The dual-view mini LED vehicle display device control method of claim 6, wherein, The S3: obtaining light source driving parameters according to the view angle display mode and the image display information comprises: S31: generating a basic partition dimming matrix from an image brightness field; S32: applying angle compensation gain and duty cycle upper limit constraints to the partition dimming matrix based on the angle transmission curve of the privacy film and the directionality curve of the brightness enhancement film; S33: performing equal ratio normalization processing on the whole to obtain each partition instruction with the normal view target white point or target peak brightness as a reference; S34: fusing the current partition instruction with the last frame instruction through exponential time smoothing; S35: applying spatial transition processing to the high-contrast partition boundary according to the fused each partition instruction; S36: determining the duty cycle of current pulse width modulation of each partition according to each partition instruction after transition processing. 8.The dual-view mini LED vehicle display device control method of claim 7, wherein, The S32: applying angle compensation gain and duty cycle upper limit constraints to the partition dimming matrix based on the angle transmission curve of the privacy film and the directionality curve of the brightness enhancement film comprises: S321: obtaining comprehensive direction transmission data according to the off-axis polar angle and azimuth angle of each backlight partition and the angle transmission curve of the privacy film and the directionality curve of the brightness enhancement film; S322: determining the angle compensation gain of each partition according to the comprehensive direction transmission data and the lower limit of the privacy angle and the upper limit of the gain parameter; S323: compensating each partition according to the basic partition dimming matrix and the angle compensation gain of each partition to obtain the compensated partition dimming data; S324: calculating the duty cycle upper limit of each partition according to the equivalent observation angle of each partition and the preset privacy viewing angle boundary requirement; S325: performing zone-by-zone amplitude limiting clipping processing according to the compensated partition dimming data and the duty cycle upper limit of each partition to obtain the amplitude-limited partition dimming data; S326: performing global scaling on the amplitude-limited partition dimming data according to the whole machine energy consumption constraint parameter to obtain the partition dimming data meeting the energy consumption constraint. 9.The dual-view mini LED vehicle display device control method of claim 8, wherein, The S321: obtaining comprehensive direction transmission data according to the off-axis polar angle and azimuth angle of each backlight partition and the angle transmission curve of the privacy film and the directionality curve of the brightness enhancement film comprises: S3211: obtaining the off-axis polar angle and azimuth angle of each backlight partition; S3212: performing interpolation in the angle transmission curve of the privacy film according to the off-axis polar angle to obtain the privacy film direction transmission data of the partition; S3213: performing interpolation in the directionality curve of the brightness enhancement film according to the off-axis polar angle and azimuth angle to obtain the brightness enhancement film directionality transmission data of the partition; S3214: fusing the privacy film direction transmission data and the brightness enhancement film directionality transmission data to obtain the direction transmission data of the partition; S3215: performing range clipping and resolution quantization processing on the direction transmission data to obtain the comprehensive direction transmission data. 10.The dual-view mini LED vehicle display device control method of claim 8, wherein, The S322: determining the angle compensation gain of each partition according to the comprehensive direction transmission data and the lower limit of the privacy angle and the upper limit of the gain parameter comprises: S3221: Obtain the lower limit of divergence prevention parameter, the upper limit of gain parameter and the abnormal value processing mode; S3222: Determine the basic angle compensation gain of each partition according to the comprehensive direction transmission data; S3223: Perform lower limit protection processing on the basic angle compensation gain; S3224: Perform upper limit clamping on the basic angle compensation gain; S3225: Group and scale the angle compensation gain of each partition according to the constraints of the whole machine power consumption and temperature rise margin; S3226: Perform spatial correction on the angle compensation gain of each partition according to the uniformity spatial correction coefficient; S3227: Perform numerical smoothing and variable step size limit processing on the angle compensation gain of each partition; S3228: Quantize the processed angle compensation gain of each partition according to the driving resolution.

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