Reflection system with edge light as light source
By using a reflection system with edge light as the light source, and by utilizing the design of the light guide plate's light outlet and imaging unit, the problem of graininess when the light guide plate is lit in automotive headlights has been solved, achieving a more uniform light source distribution and excellent lighting effect.
Patent Information
- Application Number
- CN202520358082.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-03
AI Technical Summary
The existing light guide plate solution in automotive lights has a noticeable grainy appearance when lit, which affects the uniformity of the light source and the lighting effect.
The reflection system, which uses edge light as the light source, utilizes the light outlet of the light guide plate as the light source. Combined with the parabolic focal point of the imaging unit and the specific cross-section design of the light guide plate, a continuous or stepped structure is formed to achieve uniform light distribution.
It improves the uniformity of light source illumination in the horizontal direction, reduces graininess, and enhances the lighting effect.
Smart Images
Figure CN223782696U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of vehicle lights, specifically relating to a reflection system that uses edge light as a light source. Background Technology
[0002] Vehicle lights are tools for illuminating roads at night and for issuing various vehicle signals. Light guides are frequently used in vehicle lights to guide the direction of the light.
[0003] A common light guide plate solution involves setting multiple light sources at the light input end, which then emit light after passing through the light guide plate. A diffusion pattern is set in the light emission direction of the light source and / or in the light emission part of the light guide plate. This method is used to improve the uniformity in the horizontal direction. However, the closer to the LED light source, the stronger the light intensity, but it still presents a noticeable grainy appearance when lit. Utility Model Content
[0004] The purpose of this invention is to provide a reflection system with edge light as the light source to solve the technical problem that the light still presents obvious graininess when lit, so as to achieve better lighting effect and reduce the graininess.
[0005] To solve the above-mentioned technical problems, this utility model provides a reflection system using edge light as a light source, comprising at least one:
[0006] The light source, the imaging unit, and the light guide plate are located on one side of the light-incident end of the imaging unit, and the light source illuminates the imaging unit through the light guide plate.
[0007] The contour line of the imaging unit includes a parabola, and the focal point of the parabola is a focal point F, which is located near the light outlet of the light guide plate.
[0008] Furthermore, the focal point F is located at the light outlet of the light guide plate.
[0009] Furthermore, the cross-section of the light-emitting portion of the light guide plate is a straight line.
[0010] Furthermore, the cross-section of the light-emitting portion of the light guide plate is a curve.
[0011] Furthermore, the cross-section of the light guide plate at the light outlet in the vertical plane is an outwardly convex curve, which converges the parallel light passing through the light guide plate to point O, and point O coincides with the focal point F.
[0012] Furthermore, the light guide plate has a concave curve at the light outlet in the vertical plane, and the light rays emitted from the light outlet converge at point O', which coincides with the focal point F.
[0013] Furthermore, the size of the light-emitting portion of the light guide plate is less than 5 millimeters.
[0014] Furthermore, the imaging unit has reflective properties.
[0015] Furthermore, the light guide plate adopts an extended, continuous structure or a segmented, stepped splicing structure.
[0016] Furthermore, the light source adopts a single light color or a dual light color.
[0017] The beneficial effects of this utility model are:
[0018] 1. Using the light outlet of the light guide as the light source, the lighting effect in the horizontal direction after the light source passes through the light guide is better than that of multiple light sources. That is, the light guide weakens the uniformity of the bare LED lighting in the horizontal direction. Now, it is equivalent to using a structure that is more uniform than the LED as the light source. After imaging by the imaging unit, the uniformity of lighting in the horizontal direction is better than that of the LED + light guide plate structure.
[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the reflection system of the edge light source of this utility model;
[0022] Figure 2 This is a schematic diagram of the light-emitting portion of the light guide plate of the reflective system using edge light as a light source, where the cross-section of the light-emitting portion is a curve.
[0023] Figure 3 This is a schematic diagram of the structure of the light guide plate of this utility model, where the cross-section of the light-emitting part is a concave curve.
[0024] In the picture:
[0025] 1. Light source;
[0026] 2. Imaging unit;
[0027] 3. Light guide plate. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0029] Example 1:
[0030] like Figure 1 As shown, a reflection system using edge light as a light source includes at least one: a light source 1, an imaging unit 2, and a light guide plate 3. The light guide plate 3 is located on one side of the light-incident end of the imaging unit 2, and the light source 1 illuminates the imaging unit 2 through the light guide plate 3. The contour line of the imaging unit 2 includes a parabola, and the focus of the parabola is the focus F, which is located near the light-out port of the light guide plate 3.
[0031] in, Figure 1 The position of the light source 1 and the structure of the light guide plate shown include, but are not limited to, the positions and structures shown in the figure. This solution only needs to achieve that the light source emits light through a narrow-aperture light guide plate, that is, the narrow opening of the light guide plate can be regarded as a point light source.
[0032] The focal point F is located at the light outlet of the light guide plate 3. Furthermore, the cross-section of the light-emitting portion of the light guide plate 3 is a straight line.
[0033] In this embodiment, the light source 1 uses a single light color or two light colors.
[0034] In this embodiment, the size of the light-emitting part of the light guide plate 3 is less than 5 mm. At this time, the light-emitting port of the light guide plate 3 can be regarded as the light source 1.
[0035] The imaging unit 2 has reflective properties, and the light guide plate 3 adopts an extended, continuous structure or a segmented, stepped splicing structure, thus demonstrating that the imaging unit 2 can be a continuous cylindrical reflective mirror structure or a segmented, stepped splicing structure.
[0036] Example 2: A reflection system using edge light as a light source, which differs from Example 1 in that, as Figure 2 As shown, the cross-section of the light-emitting part of the light guide plate 3 is a curve, and the cross-section of the light-emitting port of the light guide plate 3 in the vertical plane is an outward convex curve. The outward convex curve enables the emitted light rays to converge at point O, and point O coincides with the focal point F.
[0037] Example 3: A reflection system using edge light as a light source, which differs from Example 2 in that, as Figure 3As shown, the cross-section of the light guide plate 3 at the light outlet in the vertical plane contains a concave curve. The light rays emitted from the light guide plate 3 through the concave curve converge at point O' in the reverse direction. Point O' coincides with the focal point F.
[0038] In summary: taking the light outlet of the light guide as light source 1, the lighting effect of light source 1 in the horizontal direction is better than that of multiple light sources 1 after passing through the light guide, that is, the light guide weakens the uniformity of the bare LED lighting in the horizontal direction; now, it is equivalent to taking a structure that is more uniform than the LED as light source 1, then after imaging by the imaging unit 2, the uniformity of lighting in the horizontal direction is better than the structure of LED + light guide plate 3.
[0039] All the devices selected in this application are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.
[0040] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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.
[0041] 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 the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0042] 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 reflection system using edge light as a light source, characterized in that, Including at least one: The light source (1), the imaging unit (2), and the light guide plate (3) are located on one side of the light-incident end of the imaging unit (2). The light source (1) illuminates the imaging unit (2) through the light guide plate (3). The contour of the imaging unit (2) includes a parabola, the focal point of which is a focal point F, which is located near the light outlet of the light guide plate (3).
2. The reflection system using edge light as a light source as described in claim 1, characterized in that, The focal point F is located at the light outlet of the light guide plate (3).
3. A reflection system using edge light as a light source as described in claim 2, characterized in that, The cross-section of the light-emitting part of the light guide plate (3) is a straight line.
4. A reflection system using edge light as a light source as described in claim 3, characterized in that, The cross-section of the light-emitting part of the light guide plate (3) is a curve.
5. A reflection system using edge light as a light source as described in claim 4, characterized in that, The light guide plate (3) has a convex curve at the light outlet in the vertical plane. The convex curve converges the parallel light passing through the light guide plate (3) to point O, and point O coincides with the focal point F.
6. A reflection system using edge light as a light source as described in claim 5, characterized in that, The light guide plate (3) has a concave curve at the light outlet in the vertical plane. The light rays emitted from the light outlet through the light guide plate (3) converge at point O' in the reverse direction. Point O' coincides with the focal point F.
7. A reflection system using edge light as a light source as described in claim 6, characterized in that, The light source (1) adopts a single light color or a dual light color.
8. A reflection system using edge light as a light source as described in claim 7, characterized in that, The size of the light-emitting part of the light guide plate (3) is less than 5 mm.
9. A reflection system using edge light as a light source as described in claim 8, characterized in that, The imaging unit (2) has reflective properties.
10. A reflection system using edge light as a light source as described in claim 9, characterized in that, The light guide plate (3) adopts an extended, continuous structure or a segmented, stepped splicing structure.