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 light guide module, a lens module and a diffusion module, and the light source module, the light guide module, the lens module and the diffusion module are arranged in sequence. The lens module is obtained by performing wedge angle processing on a plane part of a preset lens; the light source module is used for providing light; the light guide module is used for carrying out light mixing and light receiving treatment on the light rays and is used for improving the lighting effect of the LED; the lens module is used for deflecting the processed light to enable the deflected light to coincide with the imaging main light; and the diffusion module is used for converting the deflected light into an area light source and providing backlight for the display module, so that the head-up display lighting device provided by the utility model has the advantages that the size is reduced and the degree of freedom of the lighting device is improved while the visual brightness uniformity is not influenced.

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. It can be applied to the civilian field, eliminating the trouble of looking down at the dashboard. With the sense of technology of aerial imaging, it has attracted the interest of many manufacturers and consumers. At present, the design and development of HUD is moving towards small size, low power consumption and large FOV. The imaging structure of existing HUD equipment is relatively large. In most cases, the space left for HUD in the car is not large. After the HUD imaging optical path is arranged, the space for lighting devices is even smaller. How to avoid interference while meeting the lighting requirements is one of the problems that need to be solved at present. How to achieve small size, low cost and freedom is an urgent problem to be solved. Utility Model Content

[0003] An object of the embodiments of the present application is to provide a head-up display lighting device, which is used to reduce the volume of the head-up display lighting device and avoid structural interference.

[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 light guide module, a lens module and a diffusion module, wherein the light source module, the light guide module, the lens module and the diffusion module are arranged in sequence; the center position of the light source module corresponds to the center position of the lens module; the lens module is obtained by performing wedge angle processing on a plane part of a preset lens;

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

[0006] The light guide module is used to mix and collect the light, so as to improve the light efficiency of the LED;

[0007] The lens module is used to deflect the processed light so that the deflected light coincides with the imaging principal light;

[0008] The diffusion module is used to convert the deflected light into a surface light source to provide backlight for the display module.

[0009] In the above implementation process, the head-up display lighting device at least includes a light source module, a light guide module, a lens module and a diffusion module, wherein the light source module, the light guide module, the lens module and the diffusion module are arranged in sequence; the lens module is obtained by performing wedge angle processing on the plane part of a preset lens; the light source module is used to provide light; the light guide module is used to mix and collect the light, so as to improve the light efficiency of the LED; the lens module is used to deflect the processed light so that the deflected light coincides with the main imaging light; the diffusion module is used to convert the deflected light into a surface light source to provide backlight for the display module. In this way, the head-up display lighting device provided by the present application reduces the volume and improves the degree of freedom of the lighting device without affecting the uniformity of visual brightness.

[0010] Optionally, the lens module has a first preset angle.

[0011] Optionally, the lens module includes at least a first surface and a second surface, wherein the first surface and the second surface present the first preset angle.

[0012] In some embodiments of the present application, the lens module has a first preset angle. In order to ensure that the illumination light and the main imaging light coincide, a microstructure is provided on one side of the deflection lens to compensate for the light deflection problem caused by the structural deflection.

[0013] Optionally, an angle range between the first surface and the second surface of the lens module is 0°-60°.

[0014] In some embodiments of the present application, the microstructure has a natural light-uniformity characteristic, which reduces the requirements for assembly tolerances. At this time, the illumination light is deflected and the imaging light path is compensated, so that a uniform light spot can be obtained on the diffusion film, forming a uniform surface light source, providing uniform backlight for the LCD screen.

[0015] Optionally, one surface of the lens module is a microstructure surface, and the other surface is a spherical surface, an aspherical surface or a free-form surface.

[0016] Optionally, the microstructure surface is serrated.

[0017] In some embodiments of the present application, a common inclined surface is made into a microstructure, which not only reduces the thickness so that the light-guiding part and the lens part are in close contact, but also reduces the absorption of light by the lens material, thereby improving the utilization rate of the light source.

[0018] Optionally, the angle range of the lens module and the diffusion module is 0°-60°.

[0019] In some embodiments of the present application, when the lens module and the diffusion module are in a parallel state, the thickness of the lens module can be further reduced.

[0020] Optionally, the display module includes an LCD screen.

[0021] Optionally, the diffusion module includes a diffusion plate or a diffusion membrane.

[0022] The diffusion plate or diffusion 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.

[0023] Optionally, the lens module or the diffusion module is made of transparent optical plastic or optical glass.

[0024] 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 the requirements of automotive regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 A structural block diagram of a head-up display lighting device provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of a head-up display lighting device provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of another head-up display lighting device provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of another head-up display lighting device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] Please see Figure 1 , Figure 1 This is 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 101, a light guide module 102, a lens module 103, a diffusion module 104 and a display module 105, wherein the light source module 101, the light guide module 102, the lens module 103, the diffusion module 104 and the display module 105 are arranged in sequence; the lens module is obtained by performing wedge angle processing on the plane part of a preset lens; the preset lens at least includes a plano-convex lens or a plano-concave lens;

[0033] The light source module 101 is used to provide light;

[0034] The light guide module 102 is used to mix and collect light, so as to improve the light efficiency of the LED;

[0035] The lens module 103 is used to deflect the processed light so that the deflected light coincides with the imaging principal light;

[0036] The diffusion module 104 is used to convert the deflected light into a surface light source to provide backlight for the display module.

[0037] In the above implementation process, the head-up display lighting device at least includes a light source module, a light guide module, a lens module and a diffusion module, wherein the light source module, the light guide module, the lens module and the diffusion module are arranged in sequence; the lens module is obtained by performing wedge angle processing on the plane part of a preset lens; the light source module is used to provide light; the light guide module is used to mix and collect light, so as to improve the light efficiency of the LED; the lens module is used to deflect the processed light so that the deflected light coincides with the main imaging light; the diffusion module is used to convert the deflected light into a surface light source to provide backlight for the display module. In this way, the head-up display lighting device provided by the present application reduces the volume and improves the degree of freedom of the lighting device without affecting the uniformity of visual brightness.

[0038] like Figure 2 As shown, the embodiment of the present application is a high-freedom LCD backlighting system, including sequentially arranged LED light sources (light source modules), light guide structures (light guide modules), deflection lenses (lens modules), diffusion films (diffusion modules) and LCD screens (display modules). The deflection lenses are formed by performing wedge angle processing or adding array wedge angles on the plane parts of ordinary plano-convex or plano-concave lenses, and have good light homogenization effects. The structure uses an array wedge angle to deflect and homogenize the received light, thereby reducing visually visible textures and improving the brightness uniformity of the image surface.

[0039] Among them, the light-guiding structure is a common reflective cup shape, and a scale structure can be set to improve the uniformity of brightness.

[0040] Optionally, the lens module has a first preset angle.

[0041] Optionally, the lens module includes at least a first surface and a second surface, wherein the first surface and the second surface present a first preset angle.

[0042] For example, the first preset angle may be 20 degrees.

[0043] The lens module is a right-angled triangular convex platform. As the angle increases, the lens will become thicker and thicker. In order to avoid this problem, the inclined side is made similar to the Fresnel lens. The current microstructure is a lot of small right-angled triangular convex platforms, which avoids the thickness problem. The lens module with microstructure and the diffusion module are at a certain angle, or they can be parallel. Figure 3 and Figure 4 When there is no microstructure, the two surfaces of the lens module must be at an angle to have the deflection function. When there is a microstructure, the two surfaces of the lens module can be parallel or at an angle. The angle can further expand the deflection angle.

[0044] Specifically, the light emitted by the LED light source is mixed and initially collected by the light guide structure to improve the utilization rate of the light source. To avoid interference, the structure needs to be deflected at a certain angle. In order to ensure that the illumination light and the main imaging light coincide, a bevel is provided on one side of the deflection lens to compensate for the light deflection problem caused by the structural deflection. Figure 2 As shown, the deflected light is collected by the convex surface of the lens to match the imaging system, wherein the angle of the inclined surface can be adjusted as needed.

[0045] In some embodiments of the present application, the first surface and the second surface of the lens module present a first preset angle. In order to ensure that the illumination light and the main imaging light coincide, a slope is provided on one side of the deflection lens to compensate for the light deflection problem caused by the structural deflection.

[0046] Optionally, the angle range between the first surface and the second surface of the lens module is 0°-60°.

[0047] They can be parallel or at an angle. For example, when the deflection angle is not enough to make the two modules parallel, there is still an angle. Compared with the module without lens, the angle will be smaller.

[0048] In some embodiments of the present application, the microstructure has a natural light-uniformity characteristic, which reduces the requirements for assembly tolerances. At this time, the illumination light is deflected and the imaging light path is compensated, so that a uniform light spot can be obtained on the diffusion film, forming a uniform surface light source, providing uniform backlight for the LCD screen.

[0049] Optionally, one surface of the lens module is a microstructure surface, and the other surface is a spherical surface, an aspherical surface or a free-form surface.

[0050] Optionally, the microstructure surface is serrated.

[0051] because Figure 2 The thickness of the deflection lens in the lens is uneven, which makes the assembly more troublesome. The uneven thickness on both sides will cause the thicker part to absorb more light, reducing the utilization rate of the light source. The embodiment of the present application provides a lens module, the first surface and the second surface of the lens module are parallel, and the ordinary inclined surface is made into a microstructure, which not only reduces the thickness, makes the light guide part and the lens part contact closely, but also reduces the absorption of light by the lens material, thereby improving the utilization rate of the light source; Figure 3 As shown, one side of the lens has a microstructure, which has a natural light uniformity characteristic, reducing the requirements for assembly tolerances. At this time, the illumination light is deflected, compensating the imaging light path, so that a uniform light spot can be obtained on the diffusion film, forming a uniform surface light source, and providing uniform backlight for the LCD screen.

[0052] In some embodiments of the present application, a common inclined surface is made into a microstructure, which not only reduces the thickness so that the light-guiding part and the lens part are in close contact, but also reduces the absorption of light by the lens material, thereby improving the utilization rate of the light source.

[0053] Optionally, the angle range of the lens module and the diffusion module is 0°-60°.

[0054] The embodiment of the present application can adjust the angle of the inclined plane in three dimensions or adjust the rotation angle of the deflection lens and the entire light guide structure according to the actual situation, and make appropriate position adjustments to match the imaging light path. It has good robustness. For different backlight structures, it can be considered to introduce this structure for position adjustment and uniformity optimization. In an extreme case, the LCD screen and the lighting structure can be made parallel. Figure 4 As shown, compared Figure 3 Structure, the volume of the entire backlight structure is further reduced.

[0055] In some embodiments of the present application, when the lens module and the diffusion module are in a parallel state, the thickness of the lens module can be further reduced.

[0056] Optionally, the diffusion module includes a diffusion plate or a diffusion membrane.

[0057] The diffusion plate or diffusion 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.

[0058] Optionally, the lens module or the diffusion module is made of transparent optical plastic or optical glass.

[0059] 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 the requirements of automotive regulations.

[0060] The embodiment of the present application is a high-freedom LCD backlighting system, which can reduce the volume and increase the freedom of the lighting device without affecting the visual brightness uniformity. It mainly plays the role of adjusting the position of the backlight structure without introducing a new structure. The bevel microstructure is a simple structure, easy to process, with low tolerance requirements, saving materials and convenient mold opening.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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 includes a light source module, a light guide module, a lens module and a diffusion module, wherein the light source module, the light guide module, the lens module and the diffusion module are arranged in sequence; the lens module is obtained by performing wedge angle processing on the plane part of a preset lens; The light source module is used to provide light; The light guide module is used to mix and collect the light, so as to improve the light efficiency of the LED; The lens module is used to deflect the processed light so that the deflected light coincides with the imaging principal light; The diffusion module is used to convert the deflected light 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 has a first preset angle.

3. The head-up display lighting device according to claim 2, characterized in that: The lens module includes at least a first surface and a second surface, wherein the first surface and the second surface present the first preset angle.

4. The head-up display lighting device according to claim 3, characterized in that: The angle range between the first surface and the second surface of the lens module is 0°-60°.

5. The head-up display lighting device according to claim 4, characterized in that: One side of the lens module is a microstructure surface, and the other side is a spherical surface, an aspherical surface or a free-form surface.

6. The head-up display lighting device according to claim 5, characterized in that: The microstructure surface is sawtooth-shaped.

7. The head-up display lighting device according to claim 6, characterized in that: The angle range of the lens module and the diffusion module is 0°-60°.

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

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

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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