High-brightness HUD backlight module

Abstract

The utility model relates to the technical field of semiconductor display backlight, in particular to a high-brightness HUD backlight module which comprises an HUD backlight base and a cover plate, a substrate is arranged in the HUD backlight base, Mini LED lamp beads are arranged on the substrate, a lens plate is arranged above the Mini LED lamp beads, a Fresnel lens structural member is arranged above the lens plate, and the Fresnel lens structural member is arranged above the lens plate. The Mini LED lamp beads are matched with the light structure of the lower plate face of the lens plate, and the light structure of the upper plate face of the lens plate is matched with the concentric circle lines of the Fresnel lens structural part. The HUD backlight adopts a lens plate which is located above the Mini LED lamp beads, and light rays are converged and converted into parallel light to be output. Compared with the prior art, under the condition that the number of the lamp beads is the same, the brightness and the definition are improved. Meanwhile, the problem of hexagonal dark lines is solved through the light suppression film, so that the HUD is higher in brightness, uniform in light emission and clearer in display effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of semiconductor display backlight, specifically relates to a high brightness HUD backlight module. BACKGROUND

[0002] The head-up display, also known as the head-up display system, is a blind operation, multifunctional instrument panel centered on the vehicle driver. Its main function is to display the speed, navigation and other key driving information on the windshield in front of the driver through projection. In this way, the driver can minimize the action of lowering or turning his head during driving, so as to directly see the speed, navigation and other key driving information, improving the convenience and safety of driving.

[0003] However, the head-up display system on the market has a common problem, that is, the light brightness is uneven. This problem may cause the driver to have visual difficulties when viewing the projected information, thereby affecting the driving experience. More seriously, the uneven light brightness may distract the driver's attention and increase the risk of driving, thereby affecting the safety of driving. INVENTION CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model discloses a high brightness HUD backlight module for solving the above problems.

[0005] The utility model is realized through the following technical schemes:

[0006] The utility model provides a high brightness HUD backlight module, including HUD backlight base and cover plate, be equipped with the substrate in the HUD backlight base, be equipped with Mini LED lamp pearl on the substrate, be equipped with the lens plate that cooperates with Mini LED lamp pearl on Mini LED lamp pearl top, be equipped with the Fresnel lens structural member on the lens plate top, wherein, the concentric circle line of the Fresnel lens structural member cooperates with the lens plate upper board surface light structure.

[0007] Further, the Fresnel lens structural member is provided with a light suppression film.

[0008] Further, the light suppression film is provided with suppression points A and B, wherein the radius of the suppression point A is greater than the radius of the suppression point B.

[0009] Further, the suppression point B is arranged in a circular distribution around the suppression point A, and the suppression point A corresponds to the concentric circle line center of the Fresnel lens structural member.

[0010] Further, the light suppression film is provided with an upper diffusion sheet.

[0011] Further, a lower diffusion sheet is arranged between the Fresnel lens structure and the lens plate.

[0012] Further, a mounting column is arranged on the base, and the mounting column is used for mounting the Fresnel lens structure, the diffusion sheet and the cover plate.

[0013] Further, the Mini LED lamp beads are arranged in a matrix mode, and a heat conduction layer is arranged between the substrate and the Mini LED lamp beads to improve the heat dissipation efficiency.

[0014] Further, the Mini LED lamp beads are matched with the lower plate surface light structure of the lens plate, and the lower plate surface light structure of the lens plate is a light condensing structure and is used for converging the light of the corresponding Mini LED lamp bead.

[0015] Further, the upper plate surface light structure of the lens plate is a light diffusing structure and is used for emitting the light converged by the lower plate surface light structure of the lens plate to the concentric circle lines of the Fresnel lens structure after diffusing the light by an angle γ, wherein tanγ≈OD / 0.5Pitch, OD is the distance between the lens plate and the Fresnel lens structure, and Pitch is the maximum diameter of the concentric circle lines in the Fresnel lens structure.

[0016] The beneficial effects of the present application are as follows:

[0017] The HUD backlight of the present application is configured with a lens plate above the Mini LED lamp bead, the double-sided optical structure of the lens plate can converge the light emitted by the lamp bead, and the light is converted into parallel light output through the Fresnel lens structure. Compared with the existing Mini LED head-up display device, the brightness of the present application is significantly improved and the clarity of the product is enhanced under the condition of the same number of lamp beads. In addition, the present application is also provided with a light suppression film, which effectively solves the problem of hexagonal dark lines generated in the process of using the traditional Fresnel lens structure, so that the HUD of the present application has higher brightness, more uniform light emission and clearer display effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 is a high-brightness HUD backlight module structure schematic diagram of the present application;

[0020] Figure 2 is a structural light suppression film schematic diagram of the utility model;

[0021] Figure 3 is a lens plate light transmission principle schematic diagram of the utility model embodiment;

[0022] Figure 4 is a concentric circle line structure schematic diagram of the Fresnel lens structural member of the utility model embodiment;

[0023] Figure 5 is a lens plate and Fresnel lens structural member cooperation light guide principle schematic diagram of the utility model embodiment;

[0024] The labels in the figure respectively represent:

[0025] 1, cover plate; 2, upper diffusion plate; 3, Fresnel lens structural member; 3.1, suppression point A; 3.1, suppression point B; 4, lower diffusion plate; 5, HUD backlight base; 6, lens plate; 7, base plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model embodiments clearer, the technical scheme in the utility model embodiments will be clearly and completely described below in conjunction with the drawings in the utility model embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] In an embodiment, referring to Figure 1 , a high-brightness HUD backlight module is provided, comprising a HUD backlight base and a cover plate, the HUD backlight base is provided with a base plate inside, the base plate is provided with Mini LED lamp beads, the upper side of the Mini LED lamp beads is provided with a lens plate matched with the Mini LED lamp beads, specifically, the Mini LED lamp beads correspond to the light structure on the lens plate.

[0028] The upper side of the lens plate is provided with a Fresnel lens structural member (referring to Figure 3 ), wherein the Mini LED lamp beads are matched with the light structure on the lower plate surface of the lens plate, and the light structure on the upper plate surface of the lens plate is matched with the concentric circle line of the Fresnel lens structural member.

[0029] In an embodiment, the Fresnel lens structural member is provided with a light suppression film; referring to Figure 2As shown, the light suppression film is provided with suppression point A and suppression point B, wherein the radius of the suppression point A is greater than the radius of the suppression point B. The suppression point B is arranged in a circular surface distribution with the suppression point A as the center. The suppression point A corresponds to the center of the concentric circle line of the Fresnel lens structure.

[0030] In the high-brightness HUD backlight module, the setting of the light suppression film significantly improves the contrast and clarity of the display effect. By setting suppression points of different radii on the Fresnel lens structure, the scattering and reflection of light can be effectively controlled, thereby reducing unnecessary halos and glare phenomena. Suppression point A, as a larger suppression area, is mainly responsible for absorbing and scattering direct strong light from the Mini LED lamp beads, while suppression point B, as a smaller suppression area, further refines and adjusts the light distribution to ensure that the light passes through the Fresnel lens structure uniformly, ultimately forming a clear image on the lens plate.

[0031] In addition, the high-brightness HUD backlight module also includes a control circuit connected to the Mini LED lamp beads on the substrate. The control circuit is responsible for adjusting the brightness and color of the Mini LED lamp beads to adapt to different display requirements. By precisely controlling the luminous intensity of each Mini LED lamp bead, fine adjustment of the brightness of the HUD display content can be achieved, thereby maintaining good visibility under different environmental lighting conditions.

[0032] In practical applications, the HUD backlight module can be widely used in the HUD systems of vehicles such as cars and airplanes. Its high brightness and high contrast characteristics enable the driver to clearly see the information displayed on the HUD under various lighting conditions, thereby improving driving safety and comfort. In addition, the compact design of the module also makes it easy to integrate into HUD systems of various sizes and shapes, providing more possibilities for future intelligent cockpit design.

[0033] In an embodiment, an upper diffusion sheet is provided on the light suppression film to enhance the display effect. Furthermore, a lower diffusion sheet is provided between the Fresnel lens structure and the lens plate. This can further enhance the display effect.

[0034] The base is provided with a mounting column, which is used to mount the Fresnel lens structure, diffusion sheet, and cover plate.

[0035] In an embodiment, the arrangement of Mini LED lamp beads is in a matrix arrangement, and a heat-conducting layer is provided between the substrate and the Mini LED lamp beads to improve heat dissipation efficiency.

[0036] In another embodiment, the Mini LED chips are arranged in a staggered layout. This layout further optimizes light distribution, reduces light spot phenomena, and thus improves the uniformity of the display effect. Furthermore, the staggered layout helps reduce thermal interference between adjacent chips, improving overall heat dissipation performance.

[0037] To further enhance the performance of the HUD backlight module, an intelligent temperature control system is introduced in this embodiment. This system can monitor the module's temperature in real time and automatically adjust the current of the Mini LED beads according to temperature changes to keep the module operating within its optimal temperature range. This intelligent temperature control mechanism not only extends the module's lifespan but also ensures the stability and reliability of the HUD display under extreme temperature conditions.

[0038] During the manufacturing process, this embodiment also places special emphasis on the module's sealing performance. By employing advanced sealing technology, the module's internal dustproof and waterproof rating meets the IP67 standard. This design allows the HUD backlight module to maintain normal operation even in harsh external environments, greatly expanding its application range and usage scenarios.

[0039] In one embodiment, reference is made to Figure 4 and 5 As shown, n1 and n2 represent the refractive indices of air and the lens plate, respectively. The lower plate surface light structure of the lens plate is a focusing structure, used to converge the light from the corresponding Mini LED beads. The upper plate surface light structure of the lens plate is a diffusing structure, used to diverge the light converged by the lower plate surface light structure of the lens plate by an angle γ and then emit it to the concentric circle pattern of the Fresnel lens structure, where the angle γ is tanγ≈OD / 0.5Pitch, where OD is the distance between the lens plate and the Fresnel lens structure, and Pitch is the maximum diameter of the concentric circle pattern in the Fresnel lens structure.

[0040] In this high-brightness HUD backlight module, reliability and durability are also considered. By setting a thermally conductive layer between the Mini LED chips and the substrate, not only is heat dissipation efficiency improved, but the stability of the module under long-term operation is also ensured. The thermally conductive layer is usually made of highly thermally conductive materials, such as thermal adhesive or thermal grease, which can effectively conduct the heat generated by the LED chips to the substrate, and then dissipate the heat through the substrate, thereby avoiding the occurrence of local overheating.

[0041] The high-brightness HUD backlight module has good environmental adaptability.

[0042] To sum up, the high-brightness HUD backlight module provided by the utility model has a series of innovative designs and optimizations, which not only improve the display brightness and uniformity, but also enhance the contrast and definition, and at the same time, ensure the heat dissipation efficiency and environmental adaptability of the module. These advantages make the HUD backlight module of the utility model have a wide application prospect in the HUD systems of vehicles, aircraft and other transportation tools, and provide a safer and more comfortable driving experience for drivers.

[0043] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A high-brightness HUD backlight module, comprising a HUD backlight base and a cover plate, wherein a substrate is disposed within the HUD backlight base, and Mini LED beads are disposed on the substrate, characterized in that, Above the Mini LED bead is a lens plate that cooperates with the Mini LED bead. Above the lens plate is a Fresnel lens structure. The upper surface of the lens plate has a light structure that cooperates with the concentric circle pattern of the Fresnel lens structure.

2. The high-brightness HUD backlight module according to claim 1, characterized in that, The Fresnel lens structure is provided with a light suppression film.

3. A high-brightness HUD backlight module according to claim 2, characterized in that, The light suppression film is provided with suppression point A and suppression point B, wherein the radius of suppression point A is larger than the radius of suppression point B.

4. A high-brightness HUD backlight module according to claim 3, characterized in that, The suppression points B are arranged in a circular pattern with the suppression point A as the center. The suppression points A correspond to the center of the concentric circular pattern of the Fresnel lens structure.

5. A high-brightness HUD backlight module according to claim 2, characterized in that, The light-suppressing film is provided with an upper diffuser.

6. A high-brightness HUD backlight module according to claim 1, characterized in that, A lower diffuser is provided between the Fresnel lens structure and the lens plate.

7. A high-brightness HUD backlight module according to claim 1, characterized in that, The base is provided with mounting posts, which are used to mount Fresnel lens components, diffusers, and cover plates.

8. A high-brightness HUD backlight module according to claim 1, characterized in that, The Mini LED beads are arranged in a matrix, and a heat-conducting layer is provided between the substrate and the Mini LED beads.

9. A high-brightness HUD backlight module according to claim 1, characterized in that, The lower surface of the lens plate is provided with a light structure. The Mini LED lamp beads cooperate with the light structure on the lower surface of the lens plate. The light structure on the lower surface of the lens plate is a light-concentrating structure, which is used to focus the light of the corresponding Mini LED lamp beads.

10. A high-brightness HUD backlight module according to claim 1, characterized in that, The upper plate surface light structure of the lens plate is a diffusing structure, which is used to diverge the light rays converged by the lower plate surface light structure of the lens plate by an angle γ and then emit them to the concentric circle pattern of the Fresnel lens structure. The angle γ is tanγ≈OD / 0.5Pitch, where OD is the distance between the lens plate and the Fresnel lens structure, and Pitch is the maximum diameter of the concentric circle pattern in the Fresnel lens structure.

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