Head-up display lighting device

Abstract

The embodiment of the utility model provides a head-up display lighting device which at least comprises a light source module, a lens module and a diffusion module, and the light source module, the lens module and the diffusion module are arranged in sequence. The centers of single LEDs of the light source module are in one-to-one correspondence with the centers of single lenses of the lens module; the lens module is obtained by splicing a plurality of lenses; the light source module is used for emitting light; the lens module is used for collecting light of the light source; the diffusion module is used for converting the light received by the lens module into an area light source and providing backlight for the display module, so that the head-up display lighting device is small in size, simple in assembly process and low in cost.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to a head-up display lighting device. Background Art

[0002] The head-up display (HUD) of a car can display auxiliary driving information on the front windshield of the car, eliminating the trouble of looking down at the dashboard, which has attracted the interest of many manufacturers and consumers. The head-up display lighting device can provide effective backlight support for the HUD. At present, most of the head-up display lighting devices on the market are Figure 1 As shown, the light emitted by the LED in the structure is initially collected by the first layer of lenses, effectively utilizing the LED light source, and the diffusion plate 4 expands and evens the light of the first layer of lenses, and the second layer of lenses 50 contracts the expanded light, so that the angle of the light is controlled within the angle range required by the backlighting system, thereby ensuring the uniformity of the light. However, the display structure includes two layers of lenses, and one side of the second layer of lenses has a microstructure, which will further reduce the light efficiency. This assembly method is complex, and the cost is high, and the light efficiency is low. Therefore, how to reduce the volume without reducing the light efficiency and brightness uniformity, and reduce the cost and simplify the assembly process is a problem that urgently needs to be solved. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a head-up display lighting device, which is used to realize a head-up display lighting device with a small size, a simple assembly process and a low cost.

[0004] A first aspect of an embodiment of the present application provides a head-up display lighting device, the head-up display lighting device at least comprising: a light source module, a lens module and a diffusion module, wherein the light source module, the lens module and the diffusion module are arranged in sequence; the center of a single LED of the light source module corresponds to the center of a single lens of the lens module one by one; the lens module is obtained by splicing a plurality of lenses;

[0005] The light source module is used to emit light;

[0006] The lens module is used to collect light from the light source;

[0007] The diffusion module is used to convert the light collected by the lens module into a surface light source to provide backlight for the display module.

[0008] In the above implementation process, the head-up display lighting device at least includes a light source module, a lens module and a diffusion module, wherein the light source module, the lens module and the diffusion module are arranged in sequence; the center of a single LED of the light source module corresponds one to one with the center of a single lens of the lens module; the lens module is obtained by splicing a plurality of lenses, so that the head-up display lighting device has a small volume, a simple assembly process and a low cost.

[0009] Optionally, the lens module includes at least a plurality of lens arrays of the same type.

[0010] In some embodiments of the present application, according to different requirements, the lens module includes at least a plurality of lenses of the same type, which are used to collect light emitted by the LED light source to the greatest extent.

[0011] Optionally, the lens module includes at least a plurality of lens arrays of different types.

[0012] In some embodiments of the present application, according to different requirements, the lens module includes at least a plurality of lenses of different types for collecting light emitted by the LED light source to the greatest extent.

[0013] Optionally, the lens array includes at least radial, hexagonal or rectangular.

[0014] In some embodiments of the present application, various types of lenses can be spliced ​​together according to needs to generate a lens module that meets the needs.

[0015] Optionally, the first surface of the lens module is a plane, and the second surface of the lens module is a free-form surface, which is used to improve the light effect of the light emitted by the LED light source.

[0016] Optionally, the free-form surface is a spherical surface, an aspherical surface, or a surface of another shape.

[0017] Optionally, the display module includes an LCD screen.

[0018] Optionally, the head-up display lighting device includes at least a control module, the control module is connected to the light source module, and the control module is used to control the light source to emit light according to a preset rule to perform partition display on the display device.

[0019] The head-up display lighting device in the present application also includes a control module, which is connected to the light source module. The control module is used to control the light source to emit light according to a preset rule and perform partition display on the display device.

[0020] Optionally, the diffusion module includes a diffusion sheet or a diffusion membrane.

[0021] The diffuser or diffuser film in the head-up display lighting device in the present application is used to convert the light collected by the lens into a surface light source.

[0022] In some embodiments of the present application, the single lens group and the diffuser are made of transparent optical plastic or optical glass, which has the advantages of high strength and good heat resistance, and can easily meet automotive regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A structural block diagram of a display device of the prior art;

[0025] Figure 2 A structural block diagram of a head-up display lighting device provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of another head-up display lighting device provided in an embodiment of the present application;

[0027] Figure 4 A partition display diagram provided for an embodiment of the present application;

[0028] Figure 5 This is a visual brightness diagram provided for an embodiment of the present application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0030] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] Please see Figure 2 , Figure 2 A structural block diagram of a head-up display lighting device provided in an embodiment of the present application. The head-up display lighting device at least includes: a light source module 201, a lens module 202 and a diffusion module 203, wherein the light source module 201, the lens module 202 and the diffusion module 203 are arranged in sequence; the light source module 201 corresponds to the lens module 202; the lens module 202 is obtained by splicing multiple lenses; the light source module 201 includes multiple LED light sources, and the center position of each LED light source corresponds to the center position of each lens one by one;

[0032] The light source module 201 is used to emit light;

[0033] The lens module 202 is used to collect light from the light source;

[0034] The diffusion module 203 is used to convert the light collected by the lens module into a surface light source to provide backlight for the display module 204 .

[0035] In the above implementation process, the head-up display lighting device at least includes a light source module, a lens module and a diffusion module, wherein the light source module, the lens module and the diffusion module are arranged in sequence; the center of a single LED of the light source module corresponds one-to-one to the center of a single lens of the lens module; the lens module is obtained by splicing a plurality of lenses, so that the head-up display lighting device has a small volume, a simple assembly process and a low cost.

[0036] like Figure 3 As shown, the head-up display lighting device provided by the embodiment of the present application includes an LED light source 1 (light source module), a lens group 2 (lens module), a diffusion film 3 (diffusion module) and an LCD screen 4 (display module) arranged in sequence, wherein the light source module includes a plurality of LEDs, the lens group includes a plurality of lenses, and the center of each LED corresponds to the center of the lens one by one. The distance between the light source module and the lens module is about 2 mm, the distance between the lens module and the diffusion module is about 20 mm, and the diffusion module is close to the display module.

[0037] Optionally, the lens module includes at least a plurality of lens arrays of the same type.

[0038] In some embodiments of the present application, according to different requirements, the lens module includes at least a plurality of lenses of the same type, which are used to collect light emitted by the LED light source to the greatest extent.

[0039] Optionally, the lens module includes at least a plurality of lens arrays of different types.

[0040] In some embodiments of the present application, according to different requirements, the lens module includes at least a plurality of lenses of different types for collecting light emitted by the LED light source to the greatest extent.

[0041] Optionally, the lens array includes at least radial, hexagonal or rectangular.

[0042] In some embodiments of the present application, various types of lenses can be spliced ​​together according to needs to generate a lens module that meets the needs.

[0043] Optionally, the first surface of the lens module is a plane, and the second surface of the lens module is a free-form surface.

[0044] The lens group 2 is composed of a plurality of arrays or spliced ​​lenses, which can be spliced ​​with lenses of the same shape or lenses of different shapes, such as radial, hexagonal, rectangular, arbitrary grid, etc. The first surface of the lens group 2 is usually a plane, and the second surface is a spherical surface, an aspherical surface, or a curved surface of other shapes, which is used to improve the light efficiency of the light emitted by the LED light source.

[0045] In some embodiments of the present application, the first surface of the lens module is a plane, and the second surface is a free-form surface, which is used to collect light emitted by the LED light source to the greatest extent.

[0046] Optionally, the free-form surface is a spherical surface, an aspherical surface, or a surface of another shape.

[0047] Optionally, the display module includes an LCD screen.

[0048] Optionally, the head-up display lighting device includes at least a control module, which is connected to the light source module. The control module is used to control the light source to emit light according to a preset rule and perform partition display on the display device.

[0049] The head-up display lighting device in the present application also includes a control module, which is connected to the light source module. The control module is used to control the light source to emit light according to preset rules and perform partition display on the display device.

[0050] The head-up display lighting device provided in the embodiment of the present application helps to reduce power consumption and improve contrast. In the existing LCD backlight system, the contrast mainly depends on the screen. The embodiment of the present application is based on controlling the LED light-emitting area to improve the image contrast, such as Figure 4 As shown in the figure, as the number of LEDs increases, the LEDs can be zoned and controlled with hardware control, which not only improves the contrast, but also reduces power consumption by lighting up the LEDs on demand.

[0051] Optionally, the diffusion module includes a diffusion sheet or a diffusion film.

[0052] The diffusion film 3 is a common diffusion sheet or diffusion film, which is used to convert the light collected by the lens into a surface light source. The LCD screen 4 is a common liquid crystal display screen, which is in close contact with the diffusion film.

[0053] The diffuser or diffuser film in the head-up display lighting device in the present application is used to convert the light collected by the lens into a surface light source.

[0054] In some embodiments of the present application, the single lens group and the diffuser are made of transparent optical plastic or optical glass, which has the advantages of high strength and good heat resistance, and can easily meet automotive regulations.

[0055] The light emitted by a single LED light source 1 is homogenized and initially collimated by the lens 2 to improve the maximum utilization of the LED light source. Then, after passing through the diffusion film 3, the angle of the light is increased to adapt to the lighting system. The surface shape of the lens unit and the distance of the diffusion film can be adjusted to adapt to different lighting angles of different systems. At this time, the light emitted by the LCD screen will become uniform, such as Figure 5 , from top to bottom are the eye box center brightness map, the left side brightness map and the right side brightness map, forming a visual map with uniform brightness on the image plane, providing uniform backlight for the HUD imaging system.

[0056] The embodiment of the present application utilizes a single lens group and a diffusion film to form a HUD backlight system, which can improve the uniformity of visual brightness while reducing the volume and improving the lighting efficiency. The 9-point method can be used to obtain a brightness uniformity of more than 90% for the system, with no obvious visual texture, a surface uniformity of about 80%, and high lighting efficiency. The single-layer lens absorbs less light than the double-layer lens, and the texture-free design ensures that there is no microstructure while maintaining high brightness uniformity, which is equivalent to improving the LED lighting efficiency. It is easy to process, which is mainly reflected in the single-layer lens, which can be a spherical, aspherical, or free-form surface. There is a large selection space to avoid installation errors caused by double lenses, and the materials are relatively common. In future large-scale array designs, there is little difference between using spherical surfaces and other surface shapes.

[0057] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0058] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0059] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0060] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0061] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A head-up display lighting device, characterized in that: The head-up display lighting device at least comprises a light source module, a lens module and a diffusion module, wherein the light source module, the lens module and the diffusion module are arranged in sequence; the center of a single LED in the light source module corresponds to the center of a single lens in the lens module one by one; the lens module is obtained by splicing a plurality of lenses; The light source module is used to emit light; The lens module is used to collect light from the light source; The diffusion module is used to convert the light collected by the lens module into a surface light source to provide backlight for the display module.

2. The head-up display lighting device according to claim 1, characterized in that: The lens module at least includes a plurality of lens arrays of the same type.

3. The head-up display lighting device according to claim 1, characterized in that: The lens module at least includes a plurality of lens arrays of different types.

4. The head-up display lighting device according to claim 2 or 3, characterized in that: The lens array includes at least radial, hexagonal or rectangular shapes.

5. The head-up display lighting device according to claim 1, characterized in that: The first surface of the lens module is a plane, and the second surface of the lens module is a free-form surface.

6. The head-up display lighting device according to claim 5, characterized in that: The free-form surface is a spherical surface, an aspherical surface or a surface of other shapes.

7. The head-up display lighting device according to claim 1, characterized in that: The display module includes an LCD screen.

8. The head-up display lighting device according to claim 1, characterized in that: The head-up display lighting device at least includes a control module, which is connected to the light source module. The control module is used to control the light source to emit light according to a preset rule and perform partition display on the display device.

9. The head-up display lighting device according to claim 1, characterized in that: The diffusion module includes a diffusion sheet or a diffusion film.

10. The head-up display lighting device according to claim 1, characterized in that: The lens module or the diffusion module is made of transparent optical plastic or optical glass.

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