Collimating lens and special-shaped cylindrical lens combined type HUD backlight system and vehicle
Through the combination of collimating lenses and special-shaped column lenses, an orthogonal lens design with a negative focal length is solved, and the problems of high beam uniformity and cost in the HUD system are achieved at low cost spot beam expansion and uniformity.
Patent Information
- Application Number
- CN202422618452.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-10-28
AI Technical Summary
In the existing HUD systems, the processing of micro groove array lenses is complex and costly, making it difficult to achieve low-cost beam uniformity optimization.
By combining a collimating lens and a special-shaped cylindrical lens, the first and second concave lens surfaces with a negative focal length are set to make the central axis orthogonal, the beam expansion and uniform light effect of the light spot are achieved, and the lens cost is reduced.
The illumination uniformity of the target lighting area is achieved, the lens manufacturing cost is reduced, and the use of micro groove array lenses that are difficult to design and process are avoided.
Smart Images
Figure CN223205734U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vehicle-mounted head-up displays, and particularly relates to a HUD backlight system combined with a collimating lens and a special-shaped cylindrical lens, and a vehicle. Background Art
[0002] A head-up display (HUD), also known as a head-up display, is an optical virtual image display system. Using reflection or refraction through optical lenses, this system presents various information related to vehicle or aircraft operation through a magnified virtual image directly in front of the driver's line of sight. The virtual image and the surrounding scenery appear simultaneously in the driver's field of view, allowing the driver to maintain their gaze on the road without having to look down at the instrument panel or center console, effectively mitigating the aforementioned safety risks.
[0003] The existing technical solution is that the light emitted by LED lamp beads usually passes through a collimating lens to achieve a relatively good collimation effect, and then passes through a micro-groove array to homogenize the light to achieve ideal beam uniformity before reaching the LCD screen (Liquid Crystal Display). However, the processing of the micro-groove array lens is relatively complex and the cost is relatively high. Utility Model Content
[0004] In view of this, in order to solve the problems existing in the prior art, the purpose of the present invention is to provide a HUD backlight system and vehicle composed of a collimating lens and a special-shaped cylindrical lens. Only two combined lenses, a collimating lens and a special-shaped cylindrical lens, need to be used to achieve collimation and uniform light, which can reduce costs.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A HUD backlight system combining a collimating lens and a special-shaped cylindrical lens, comprising: an LED lamp bead board, a collimating lens group, a special-shaped cylindrical lens, and an LCD screen arranged in sequence; a first concave lens surface is formed on a side of the special-shaped cylindrical lens facing the collimating lens group; a second concave lens surface is formed on a side of the special-shaped cylindrical lens facing the LCD screen; the focal lengths of the first concave lens surface and the second concave lens surface are both negative; and the central axis of the first concave lens surface is arranged orthogonally to the central axis of the second concave lens surface.
[0007] The specific technical effect is: by using a collimating lens group to collect the light emitted by the LED lamp bead board, the special-shaped cylindrical lens plays the role of expanding the beam and uniforming the light, and then setting a first concave lens surface and a second concave lens surface with a negative focal length, the central axis of the first concave lens surface is orthogonal to the central axis of the second concave lens surface, which can widen the collimated light spot and make the target lighting area evenly illuminated. Compared with using a micro-groove array lens that is difficult to design and process, the cost of the lens can be reduced.
[0008] Furthermore, the central axis of the first concave lens surface is arranged horizontally, and the central axis of the second concave lens surface is arranged vertically.
[0009] The specific technical effect is: the central axis of the first concave lens surface is set horizontally, and the central axis of the second concave lens surface is set vertically. This design can widen the collimated light spot in both the horizontal and vertical directions, making the target illumination area evenly illuminated.
[0010] Furthermore, the collimating lens group includes a plurality of collimating lenses, and the plurality of collimating lenses are arranged in an array.
[0011] Furthermore, a side surface of each of the collimating lenses facing the LED lamp bead board is spherical.
[0012] The specific technical effect is: the collimating lens carries a certain optical focal length on the side facing the LED lamp bead board, and adopts a spherical design, which has better light collection and collimation effects than a flat surface.
[0013] Furthermore, a side surface of each of the collimating lenses facing the special-shaped cylindrical lens is aspherical.
[0014] The specific technical effect is that the side of the collimating lens facing the special-shaped cylindrical lens adopts an aspherical design, which is more conducive to manufacturing and reduces manufacturing costs compared to a spherical design while meeting the light collection requirements.
[0015] Furthermore, the LED lamp bead board includes a lamp bead mounting plate and a plurality of lamp beads, and the plurality of lamp bead arrays are arranged on a side surface of the lamp bead mounting plate facing the collimating lens group, and each of the lamp beads faces one of the collimating lenses.
[0016] The specific technical effect is that each collimating lens is arranged opposite to a lamp bead, so that the light emitted by each lamp bead can be collected and collimated, thereby improving the utilization rate of the light.
[0017] A vehicle, comprising a HUD backlight system comprising a collimating lens and a special-shaped cylindrical lens as described in any one of the above items.
[0018] The beneficial effects of the utility model are:
[0019] By using a collimating lens group to collect the light emitted by the LED lamp bead board, the special-shaped cylindrical lens plays the role of expanding the beam and uniforming the light, and then setting a first concave lens surface and a second concave lens surface with a negative focal length, and the central axis of the first concave lens surface is set orthogonally to the central axis of the second concave lens surface, the collimated light spot can be widened and the illumination of the target lighting area can be made uniform. Compared with the use of micro-groove array lenses that are difficult to design and process, the cost of the lens can be reduced.
[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0022] Figure 1 This is a schematic structural diagram of the combined HUD backlight system of the utility model;
[0023] Figure 2 This is the main view of the LED lamp bead board of the utility model;
[0024] Figure 3 This is a front view of the collimating lens assembly of the present utility model;
[0025] Figure 4 This is a front view of the special-shaped cylindrical lens of the utility model;
[0026] Figure 5 yes Figure 4 Left view of;
[0027] Figure 6 yes Figure 4 A top view of
[0028] Figure 7 This is a schematic diagram of the light path of the combined HUD backlight system of the present utility model.
[0029] In the picture:
[0030] 1. LED lamp bead board; 2. Collimating lens group; 3. Special-shaped cylindrical lens; 4. LCD screen; 5. First concave lens surface; 6. Second concave lens surface; 7. Lamp bead mounting plate; 8. Lamp bead; 9. Collimating lens. DETAILED DESCRIPTION
[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.
[0032] like Figures 1 to 7 As shown, a HUD backlight system combining a collimating lens and a special-shaped cylindrical lens comprises an LED lamp bead board 1, a collimating lens group 2, a special-shaped cylindrical lens 3, and an LCD screen 4 arranged in sequence from left to right. A first concave lens surface 5 is formed on the side of the special-shaped cylindrical lens 3 facing the collimating lens group 2, and a second concave lens surface 6 is formed on the side of the special-shaped cylindrical lens 3 facing the LCD screen 4. The focal lengths of the first concave lens surface 5 and the second concave lens surface 6 are both negative, and the central axis of the first concave lens surface 5 is arranged orthogonal to the central axis of the second concave lens surface 6.
[0033] It should be noted here that: by using a collimating lens group 2 to collect the light emitted by the LED lamp bead board 1, the special-shaped cylindrical lens 3 plays the role of expanding the beam and uniforming the light, and then setting a first concave lens surface 5 and a second concave lens surface 6 with a negative focal length, the central axis of the first concave lens surface 5 and the central axis of the second concave lens surface 6 are set orthogonally, which can widen the collimated light spot and make the target lighting area evenly illuminated. Compared with using a micro-groove array lens that is difficult to design and process, the cost of the lens can be reduced.
[0034] The central axis of the first concave lens surface 5 is arranged horizontally, and the central axis of the second concave lens surface 6 is arranged vertically.
[0035] It should be noted here that the central axis of the first concave lens surface 5 is set horizontally and the central axis of the second concave lens surface 6 is set vertically. This design can widen the collimated light spot in both the horizontal and vertical directions, making the target illumination area evenly illuminated.
[0036] like Figure 1 As shown, the first concave lens surface 5 is a curved surface, which is formed by sweeping a curve along a horizontally arranged straight line; the second concave lens surface 6 is a curved surface, which is formed by sweeping a curve along a vertically arranged straight line.
[0037] The collimating lens assembly 2 includes six collimating lenses 9, which are arranged in a layout of two columns and three rows. The LED lamp bead board 1 includes a lamp bead mounting plate 7 and six lamp beads 8, which are also arranged in a layout of two columns and three rows on the side of the lamp bead mounting plate 7 facing the collimating lens assembly 2, with each lamp bead 8 facing a collimating lens 9.
[0038] It should be noted here that each collimating lens 9 is arranged opposite to a lamp bead 8, so that the light emitted by each lamp bead 8 can be collected and collimated, thereby improving the utilization rate of the light.
[0039] The side surface of each collimating lens 9 facing the LED lamp bead board 1 is spherical.
[0040] It should be noted here that the collimating lens 9 carries a certain optical focal length on the side facing the LED lamp bead board 1 and adopts a spherical design, which has better light collection and collimation effects than a flat surface.
[0041] The side surface of each collimating lens 9 facing the special-shaped cylindrical lens 3 is aspherical.
[0042] It should be noted that the side of the collimating lens 9 facing the special-shaped cylindrical lens 3 adopts an aspherical design, which is more convenient to manufacture and reduces manufacturing costs compared to a spherical design while meeting the light collection requirements.
[0043] The principle of the combined HUD backlight system of the utility model is as follows Figure 7 As shown, the light emitted by each lamp bead 8 is collected and collimated by the collimating lens 9 opposite to it and then emitted to the first concave lens surface 5. The light is widened in the horizontal direction after passing through the first concave lens surface 5 and then emitted to the second concave lens surface 6. The light is widened in the vertical direction after passing through the second concave lens surface 6 and then emitted to the LCD screen 4.
[0044] A vehicle, comprising a HUD backlight system comprising a collimating lens 9 and a special-shaped cylindrical lens 3 as described above.
[0045] In summary, the beneficial effects of the present invention are:
[0046] By using a collimating lens group 2 to collect the light emitted by the LED lamp bead board 1, the special-shaped cylindrical lens 3 plays the role of expanding the beam and uniforming the light, and then setting a first concave lens surface 5 and a second concave lens surface 6 with a negative focal length, the central axis of the first concave lens surface 5 and the central axis of the second concave lens surface 6 are set orthogonally, which can widen the collimated light spot and make the target lighting area evenly illuminated. Compared with using a micro-groove array lens that is difficult to design and process, the cost of the lens can be reduced.
[0047] The various devices selected in this application are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.
[0048] In the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.
[0049] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0050] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.
Claims
1. A HUD backlight system composed of a collimating lens and a special-shaped cylindrical lens, characterized in that: include: An LED lamp bead board (1), a collimating lens group (2), a special-shaped cylindrical lens (3) and an LCD screen (4) are arranged in sequence. A first concave lens surface (5) is formed on the side of the special-shaped cylindrical lens (3) facing the collimating lens group (2), and a second concave lens surface (6) is formed on the side of the special-shaped cylindrical lens (3) facing the LCD screen (4). The focal lengths of the first concave lens surface (5) and the second concave lens surface (6) are both negative, and the central axis of the first concave lens surface (5) is orthogonal to the central axis of the second concave lens surface (6).
2. A HUD backlight system comprising a collimating lens and a special-shaped cylindrical lens as claimed in claim 1, characterized in that: The central axis of the first concave lens surface (5) is arranged horizontally, and the central axis of the second concave lens surface (6) is arranged vertically.
3. The HUD backlight system comprising a collimating lens and a special-shaped cylindrical lens as claimed in claim 1, wherein: The collimating lens group (2) comprises a plurality of collimating lenses (9), and the plurality of collimating lenses (9) are arranged in an array.
4. The HUD backlight system comprising a collimating lens and a special-shaped cylindrical lens as claimed in claim 3, wherein: The side surface of each collimating lens (9) facing the LED lamp bead board (1) is spherical.
5. The HUD backlight system comprising a collimating lens and a special-shaped cylindrical lens as claimed in claim 3, wherein: The side surface of each collimating lens (9) facing the special-shaped cylindrical lens (3) is aspherical.
6. The HUD backlight system comprising a collimating lens and a special-shaped cylindrical lens as claimed in claim 3, wherein: The LED lamp bead board (1) comprises a lamp bead mounting plate (7) and a plurality of lamp beads (8), wherein the plurality of lamp beads (8) are arranged in an array on a side surface of the lamp bead mounting plate (7) facing the collimating lens group (2), and each of the lamp beads (8) faces a collimating lens (9).
7. A vehicle, characterized in that: The invention comprises a HUD backlight system comprising a collimating lens and a special-shaped cylindrical lens as described in any one of claims 1 to 6.