Light guide structure for improving lighting uniformity, vehicle lamp and vehicle

Abstract

The utility model relates to the technical field of car lamps, in particular to a light guide structure capable of improving lighting uniformity, which comprises at least two reflecting parts, each reflecting part is formed by a pair of reflecting unit arrays, and the two reflecting units enable received light to be respectively spread in opposite directions in the horizontal direction but at the same angle. The reflection parts are arranged in the vertical direction, and the multiple reflection parts are staggered by the position of one reflection unit in the horizontal direction. The lighting uniformity is improved by adjusting the distribution of the light intensity, and compared with the previous scheme, the uniformity is higher, and the lighting effect is higher.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, and in particular to a light guide structure that improves the uniformity of illumination. Background Technology

[0002] For a single-function signal light, the common approach is to add microstructures and diffusion patterns to the surface of the optical unit to improve the uniformity of illumination; however, this approach has low luminous efficiency and its improvement in uniformity is limited.

[0003] In addition, for the function of dual-color multiplexing, when using dual-color light sources, it cannot be guaranteed that both colors are at the focal point of the optical element. At least one color will be out of focus, which will lead to uneven illumination. Utility Model Content

[0004] The technical problem to be solved by this utility model is: In order to solve the technical problems in the prior art, this utility model provides a light guide structure to improve the uniformity of illumination.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a light guide structure to improve the uniformity of illumination, including at least two reflective parts, each reflective part is formed by a pair of reflective unit arrays, the two reflective units realize that the received light is propagated in opposite directions in the horizontal direction but at the same angle; the reflective parts are arranged in the vertical direction and are staggered by one reflective unit in the horizontal direction.

[0006] Furthermore, each pair of reflective units is arranged symmetrically along the vertical plane containing the intersection line.

[0007] Furthermore, in the vertical plane, the reflecting unit is at a certain angle to the horizontal plane, and the reflecting units arranged vertically are parallel to each other.

[0008] Furthermore, within a single reflective section, some reflective units ensure that the received light does not change its propagation direction in the horizontal direction, but only changes its propagation direction in the vertical direction.

[0009] Furthermore, when the light guide structure is composed of at least five of the aforementioned reflective portions, the dimensions of the reflective units constituting the third and fourth reflective portions in the horizontal direction are half the dimensions of the reflective units constituting the first and second reflective portions in the horizontal direction.

[0010] Furthermore, the light-emitting surface of the light guide structure has a pattern with light-diffusing function.

[0011] Furthermore, the light input to this light guide structure is typically parallel or nearly parallel light.

[0012] A vehicle headlight, including the aforementioned light guide structure for improving illumination uniformity.

[0013] A vehicle that includes one of the aforementioned headlights.

[0014] The beneficial effect of this invention is that by adjusting the distribution of light intensity, the uniformity of illumination is improved, resulting in higher uniformity and higher luminous efficiency compared to previous solutions. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall structure of the light guide structure that embodies the improvement of lighting uniformity in this utility model.

[0017] Figure 2 This is a schematic diagram of the light principle in a vertical plane for Embodiment 1 of this utility model.

[0018] Figure 3 This is a schematic diagram of the light principle in a vertical plane for Embodiment 2 of this utility model.

[0019] Figure 4 This is a schematic diagram of the light principle of the present invention.

[0020] Figure 5 This is a schematic diagram of the light principle of the present invention.

[0021] In the figure: 1, first reflective part; 11, first reflective unit; 12, second reflective unit; 2, second reflective part; 21, third reflective unit; 22, fourth reflective unit. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] This utility model discloses a light guide structure that improves the uniformity of illumination.

[0025] A light guide structure for improving illumination uniformity includes at least two reflective portions, each of which includes at least one pair of reflective unit arrays.

[0026] Example 1:

[0027] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 The light guide structure includes a first reflective part 1 and a second reflective part 2. The first reflective part 1 includes multiple sets of first reflective units 11 and second reflective units 12. The second reflective part 2 includes multiple sets of third reflective units 21 and fourth reflective units 22. The first reflective units 11 and second reflective units 12 intersect each other and are symmetrical about each other along a vertical plane passing through the intersection line. The third reflective units 21 and fourth reflective units 22 intersect each other and are symmetrical about each other along a vertical plane passing through the intersection line.

[0028] Furthermore, in the vertical plane, the first reflecting unit 11 and the second reflecting unit 12 form a certain angle with the horizontal plane, and the size of the angle can be flexibly adjusted according to space and requirements. There is a certain angle between the first reflecting unit 11 and the second reflecting unit 12, the size of which is determined by the required reflection angle. The third reflecting unit 21 is similar to the second reflecting unit 12, so it will not be described further.

[0029] The first reflective unit 1 and the second reflective unit 2 are arranged vertically. The first reflective unit 11 and the second reflective unit 12 can be translated vertically (note that the vertical direction is not only along 90 degrees, but can also be along the vertical direction at a certain angle) to obtain the third reflective unit 21 and the fourth reflective unit 22. That is, the first reflective unit 11 is parallel to the third reflective unit 21, and the second reflective unit 12 is parallel to the fourth reflective unit 22. In the horizontal direction, the first reflective unit 11, the second reflective unit 12, the third reflective unit 21, and the fourth reflective unit 22 are offset by a certain distance. This distance is the size of one reflective unit, that is, the second reflective unit 12 corresponds to the third reflective unit 21.

[0030] A portion of the first reflective section 1 is formed by an array of the aforementioned first reflective units 11 and second reflective units 12 arranged horizontally. Another portion, for example, within the first reflective section 1, includes a fifth reflective unit arranged between two adjacent sets of reflective units. This fifth reflective unit is coupled to the adjacent reflective units, and its function is to change the propagation path of the received light only in the vertical plane, without altering the horizontal propagation path. The arrangement can be as follows: first, a fifth reflective unit; then, two symmetrically arranged sets of first reflective units 11 and second reflective units 12; then, another fifth reflective unit, and so on. The arrangement of the second reflective section 2 is consistent with that of the first reflective section 1, and the fifth reflective units of the second reflective section 2 correspond to the fifth reflective units of the first reflective section 1.

[0031] It should be noted that the light input to this light guide structure is usually parallel or nearly parallel light.

[0032] The light propagation principle of the above embodiment is as follows: parallel light is input to the first reflecting unit 1. A portion of the light passes through the fifth reflecting unit and is reflected to the corresponding fifth reflecting unit of the second reflecting unit 2 before being reflected out. In the vertical plane, the light ultimately exits parallel to the incident light. A portion passes through a set of mutually symmetrical first reflecting units 11 and second reflecting units 12 of the first reflecting unit 1. The light passing through the first reflecting unit 11 is obliquely reflected to the fourth reflecting unit 22 of the second reflecting unit 2. The light passing through the second reflecting unit 12 is obliquely reflected in another direction to the third reflecting unit 21. A portion passes through adjacent reflecting units and is reflected at the same angle but in a different direction to the corresponding reflecting unit of the second reflecting unit 2. Then, it is reflected again by a fifth reflecting unit to the fifth reflecting unit of the second reflecting unit 2.

[0033] Taking dual-color light as an example, the fifth reflection unit and the first reflection unit 11 of the first reflection unit 1 correspond to color A, the second reflection unit 12 and another set of first reflection units 11 correspond to color B, and so on. Through the above light propagation principle, the result of different colors of light being arranged alternately can be obtained, and the range of each color of light interval is reduced by half compared to the range of the input. That is, when a color of light is bright, the uniformity is better than that of the input.

[0034] Example 2:

[0035] Based on Example 1, referring to Figure 3 Furthermore, an additional set of first reflective parts 1 and second reflective parts 2 is added. The size of the reflective unit of the second set of first reflective parts 1 and second reflective parts 2 is half the size of the reflective unit of the first set of first reflective parts 1 and second reflective parts 2. Thus, the uniformity is better than that of Embodiment 1.

[0036] Both Example 1 and Example 2 can ultimately add diffusion patterns in the light emission direction to further improve the uniformity of illumination.

[0037] Working principle: First, the light within a certain area is divided into equal parts, and then the divided light is interchanged, thus achieving direction reversal. To a certain extent, this changes the distribution of light intensity, weakens the difference between light and dark, and thus improves the uniformity of illumination. By adjusting the distribution of light intensity, the uniformity of illumination is improved, resulting in higher uniformity and higher luminous efficiency compared to previous solutions.

[0038] A vehicle headlight, including the aforementioned light guide structure for improving illumination uniformity.

[0039] A vehicle that includes one of the aforementioned headlights.

[0040] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A light guide structure for improving illumination uniformity, characterized in that, It includes at least two reflective parts, each of which is formed by an array of a pair of reflective units, and the two reflective units enable the received light to propagate in opposite directions but at the same angle in the horizontal direction, respectively. The reflective elements are arranged vertically and horizontally, offset by one reflective unit.

2. The light guide structure for improving illumination uniformity according to claim 1, characterized in that, Each pair of reflective units is arranged symmetrically along the vertical plane containing the intersection line.

3. The light guide structure for improving illumination uniformity according to claim 1, characterized in that, In the vertical plane, the reflecting unit is at a certain angle to the horizontal plane, and the reflecting units arranged vertically are parallel to each other.

4. The light guide structure for improving illumination uniformity according to claim 3, characterized in that, Within a single reflector, some reflective units ensure that the received light does not change its propagation direction in the horizontal direction, but only changes its propagation direction in the vertical direction.

5. The light guide structure for improving illumination uniformity as described in claim 3, characterized in that, When the light guide structure is composed of at least 5 of the aforementioned reflective parts, the dimensions of the reflective units constituting the third and fourth reflective parts in the horizontal direction are 1 / 2 of the dimensions of the reflective units constituting the first and second reflective parts in the horizontal direction.

6. The light guide structure for improving illumination uniformity as described in claim 5, characterized in that, The light-emitting surface of the light guide structure has a pattern that diffuses light.

7. The light guide structure for improving illumination uniformity as described in claim 1, characterized in that, The light input to this light guide structure is parallel light or near-parallel light.

8. A vehicle light, characterized in that, Includes a light guide structure for improving illumination uniformity as described in any one of claims 1-7.

9. A vehicle, characterized in that, Including the vehicle light described in claim 8.

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