Vehicle lamp and vehicle
By designing the reflective structure of the light guide plate in the headlight as a parallel reflective unit and forming an acute angle, the problem of uneven light is solved, the uniformity of headlight brightness and the lighting effect are improved, and the thickness of the light guide plate is reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 斯特兰蒂斯汽车集团
- Filing Date
- 2024-10-08
- Publication Date
- 2026-04-10
AI Technical Summary
In existing vehicle lights, light is significantly weakened when it propagates along the first direction within the light guide plate, resulting in uneven light emitted from the light-emitting surface, which in turn leads to uneven brightness of the vehicle lights.
Design a vehicle headlight in which the reflective structure of the light guide plate is arranged into parallel reflective units, and each reflective unit forms an acute angle with a first direction. The light emitted by the light source propagates uniformly along the first direction within the light guide plate and is emitted uniformly from the light-emitting surface.
It improves the uniformity of headlight brightness and lighting effect, reduces the thickness of the light guide plate, and provides more installation space options.
Smart Images
Figure CN121828637A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle technology, and in particular to a vehicle light. This application also relates to vehicles including such a vehicle light. Background Technology
[0002] Vehicles are equipped with lights, such as headlights to provide illumination for the driver, and taillights to provide light signals for other road users.
[0003] Typically, a vehicle headlight mainly comprises a housing, a light source housed within a cavity defined by the housing, and a light guide plate. The light guide plate has an incident light surface, an exit light surface, and a light-guiding surface opposite the exit light surface. Multiple reflective structures are arranged on the light guide surface, each with a reflective surface protruding from the light guide surface. The light guide plate is configured such that the incident light surface is aligned with the light source, the exit light surface faces the housing, and the light guide surface is located on the side of the exit light surface facing away from the housing. Light emitted from the light source enters the light guide plate through the incident light surface, propagates along a first direction within the light guide plate, and then exits from the exit light surface, thus achieving the illumination function of the vehicle headlight or providing a light signal.
[0004] In some vehicle headlights, multiple reflective structures are arranged as multiple reflective units along a first direction. In this case, the light is significantly weakened as it propagates within the light guide plate along the first direction, which leads to uneven light emission from the light-emitting surface, and consequently, uneven brightness of the headlight. Summary of the Invention
[0005] To address the aforementioned technical problems, a first aspect of this application provides a vehicle lamp. The vehicle lamp includes a housing defining a cavity; a light source disposed within the cavity; and a light guide plate disposed within the cavity. The light guide plate includes a main body portion, comprising: a first end near the light source; a second end away from the light source; a light-emitting surface located between the first and second ends; and a light-guiding surface located between the first and second ends and opposite to the light-emitting surface. The light guide surface has a plurality of reflective structures, each reflective structure having a reflective surface protruding from the light guide surface. The plurality of reflective structures are arranged in parallel plurality of reflective units, and each reflective unit forms an acute angle with a first direction extending from the first end toward the second end. Light emitted from the light source is adapted to enter the main body portion, propagate uniformly within the main body portion along the first direction, and be uniformly emitted from the light-emitting surface along a second direction extending from the light-emitting surface toward the housing.
[0006] In one embodiment, the acute angle is between 40 and 55 degrees.
[0007] In one embodiment, the light guide surface has a first edge at a first end and a second edge at a second end; the first edge is located behind the second edge along a second direction, such that the light guide surface is inclined relative to the vertical direction.
[0008] In one embodiment, a second angle is formed between the light guide surface and the vertical direction, and the degree of the second angle is between 5 degrees and 10 degrees.
[0009] In one embodiment, the light-emitting surface has a third edge at a first end and a fourth edge at a second end; the third edge is located behind the fourth edge along a second direction, such that the light-emitting surface is inclined relative to the vertical direction.
[0010] In one embodiment, a third angle is formed between the light-emitting surface and the vertical direction, and the degree of the third angle is between 3 and 5 degrees.
[0011] In one embodiment, the distance between the third edge and the first edge is between 6 mm and 7 mm, and the distance between the fourth edge and the second edge is between 2 mm and 2.5 mm.
[0012] In one embodiment, at least a portion of the light-emitting surface is provided with a pattern, and the pattern is adapted to scatter light passing through it.
[0013] In one embodiment, the light guide plate further includes a first extension extending from a first end of the main body; a light incident surface is provided on the first extension; the light incident surface is aligned with the light source so that the light emitted by the light source enters the main body of the light guide plate through the light incident surface.
[0014] In one embodiment, a first mounting structure is further provided on the first extension; the light guide plate also includes a second extension extending from the second end of the main body; and a second mounting structure is provided on the second extension.
[0015] A second aspect of this application discloses a vehicle. This vehicle includes the lights described above.
[0016] The beneficial effects of this application are as follows: In the vehicle lamp of this application, the reflective structure is arranged in a plurality of parallel reflective units, and each reflective unit forms an acute angle with the first direction. This allows light to propagate uniformly along the first direction within the main body of the light guide plate, thereby improving the uniformity of light emitted from the light-emitting surface of the main body of the light guide plate, and further improving the uniformity of the vehicle lamp brightness. Attached Figure Description
[0017] With the aid of non-limiting examples of exemplary embodiments of this application, the present application will be further described in a detailed description following with reference to several accompanying drawings. The drawings are not drawn to scale.
[0018] Figure 1 A vehicle according to one embodiment of this application is schematically shown.
[0019] Figure 2 A schematic cross-sectional view of the headlights is shown.
[0020] Figure 3 The light guide plate is shown schematically.
[0021] Figure 4 A schematic side view of the light guide plate is shown.
[0022] Figure 5a A partial magnified view of the light guide surface of the light guide plate is shown schematically.
[0023] Figure 5b A schematic side view of the reflective structure is shown.
[0024] Figure 6 A partial magnified view of the light-emitting surface of the light guide plate is shown schematically.
[0025] Figure 7 A partial magnified view of the light guide surface of a light guide plate in the prior art is shown schematically.
[0026] Figure 8 A schematic side view of a light guide plate in the prior art is shown.
[0027] List of reference numerals
[0028] 1 vehicle 11 body
[0029] 2 headlights
[0030] 201 bracket 202 function board
[0031] 3 shells, 30 chambers
[0032] 4 light sources
[0033] 5 light guide plates
[0034] 51 First extension section 52 Second mounting section
[0035] 511 First mounting structure 512 Light-receiving surface
[0036] 521 Second Installation Structure
[0037] 53 Main body
[0038] 531 First end 532 Second end
[0039] 533 light-emitting surface, 534 light-guiding surface
[0040] 535 First edge 536 Second edge
[0041] 537 Third Edge 538 Fourth Edge
[0042] 539 pattern
[0043] 54 Reflection Structure
[0044] 541 Reflecting surface 542 Reflecting unit
[0045] 541a First reflecting surface; 541b Second reflecting surface
[0046] 5a Light guide plate in existing technology
[0047] The light guide surface of the light guide plate in the prior art 534a
[0048] 54a Reflective structure in the prior art 542a Reflective unit in the prior art
[0049] X (first direction) and Y (second direction)
[0050] Z vertical direction θ included angle Detailed Implementation
[0051] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0052] Figure 1 A vehicle 1 according to one embodiment of this application is schematically shown. Figure 1 As shown, vehicle 1 includes a body 11 and a headlight 2 mounted on the body 11. The headlight 2 serves as a headlight to provide illumination for the driver. In other embodiments not shown, the headlight may also be a taillight or turn signal, etc., to provide light signals to other road users.
[0053] The technical solution of this application is described below using a vehicle lamp as a headlight as an example.
[0054] Reference Figure 2 The vehicle headlight 2 mainly includes a housing 3, a light source 4, and a light guide plate 5. The housing 3 defines a cavity 30. The light source 4 and the light guide plate 5 are disposed within the cavity 30. In one embodiment, the light source 4 can be a light-emitting LED, or other suitable light-emitting device.
[0055] For reference Figure 2 and Figure 3As shown, the light guide plate 5 includes a main body 53. The main body 53 includes a first end 531, a second end 532 opposite to the first end 531, a light-emitting surface 533 located between the first end 531 and the second end 532, and a light-guiding surface 534 located between the first end 531 and the second end 532. The light-guiding surface 534 is opposite to the light-emitting surface 533. After the light guide plate 5 is placed in the cavity 30, the first end 531 is close to the light source 4, the second end 532 is away from the light source 4, the light-emitting surface 533 faces the housing 3, and the light-guiding surface 534 is located on the side of the light-emitting surface 533 facing away from the housing 3. In one embodiment, the light guide plate 5 is transparent, for example, made of acrylic sheet, so that the light emitted by the light source 4 can propagate within the light guide plate 5 (this will be described below).
[0056] Reference Figure 4 and Figure 5a Multiple reflective structures 54 are constructed on the light guide surface 534. Each reflective structure 54 has a reflective surface 541 protruding from the light guide surface 534. Light propagating within the main body 53 of the light guide plate 5 is reflected by the reflective surface 541 back into the main body 53 of the light guide plate 5 after hitting the reflective surface 541. Furthermore... Figure 5a As shown, these reflective structures 54 are arranged adjacent to each other to form a plurality of parallel reflective units 542. Each reflective unit 542 forms an acute angle θ with a first direction X extending from the first end 531 toward the second end 532.
[0057] When the headlight 2 is in use, the light emitted by the light source 4 enters the main body 53 of the light guide plate 5. Reflected by the reflective surfaces 541 and the light-emitting surface 533, the light propagates relatively uniformly along the first direction X within the main body 53 of the light guide plate 5, and is then relatively uniformly emitted from the light-emitting surface 533 along the second direction Y extending from the light-emitting surface 533 towards the housing 3, and finally exits outside the housing 3. In this way, the headlight 2 achieves the function of illuminating the driver.
[0058] Reference Figure 7 and Figure 8 The light guide plate 5a in the prior art has a light guide surface 534a with a reflective structure 54a that is substantially the same as the reflective structure 54a in this application. However, the reflective units 542a formed by these reflective structures 54a are parallel to the first direction X. Compared with the light guide plate 5a in the prior art, in this application, the reflective units 542a form an acute angle θ with the first direction X. Thus, compared with the prior art, the reflective surface of the reflective structure in this application has rotated relative to the reflective surface of the reflective structure in the prior art (see reference). Figure 4 and Figure 8Therefore, the normal direction of the reflective surface of the reflective structure in this application (i.e., the direction perpendicular to the reflective surface) has changed compared to the normal direction of the reflective surface of the reflective structure in the prior art. This allows light to propagate more uniformly along the first direction X within the main body 53 of the light guide plate 5 in this application, thereby achieving more uniform light emission from the light-emitting surface 533 of the main body 53 and improving the uniformity of the brightness of the headlight 2.
[0059] In one embodiment, such as Figure 5b As shown, the reflective surface 541 includes a first reflective surface 541a extending obliquely from the light guide surface 534 and a second reflective surface 541b extending obliquely from the light guide surface 534. The free ends of the first reflective surface 541a and the second reflective surface 541b are connected to each other. Along the side view direction of the light guide plate 5, the reflective surface 541 forms an angle. This reflective structure 54 is well known to those skilled in the art and will not be described in detail here. It should be understood that the reflective surface of the reflective structure can also be constructed in other forms (e.g., an arc surface), as long as the reflective surface of these reflective structures can enable light to propagate relatively uniformly in the main body of the light guide plate along the first direction and to be emitted relatively uniformly from the light emitting surface along the second direction.
[0060] In one embodiment, the acute angle θ between the reflecting unit 542 and the first direction X is between 40 and 55 degrees. This helps to make the light propagate more uniformly along the first direction X (i.e., from the first end 531 to the second end 532) within the main body 53 of the light guide plate 5, thereby further improving the brightness uniformity of the headlight 2. Of course, the acute angle θ can be set to other values depending on the actual situation, and there is no limitation here.
[0061] like Figure 4 As shown, the light guide surface 534 has a first edge 535 at a first end 531 and a second edge 536 at a second end 532. The first edge 535 is located behind the second edge 536 along the second direction Y, thereby the light guide surface 534 is inclined relative to the vertical direction Z. In this application, the vertical direction Z is generally parallel to the height direction of the vehicle 1. Also as... Figure 4As shown, the light-emitting surface 533 has a third edge 537 at the first end 531 and a fourth edge 538 at the second end 532. The third edge 537 is located behind the fourth edge 538 along the second direction Y, thereby causing the light-emitting surface 533 to be inclined relative to the vertical direction Z. This type of light guide surface 534 and light-emitting surface 533, as well as the aforementioned reflective unit 542, all contribute to the uniform propagation of light within the main body 53 along the first direction X (i.e., from the first end 531 to the second end 532), thereby improving the brightness uniformity of the headlight 2. In addition, this type of light guide surface 534 and light-emitting surface 533, as well as the aforementioned reflective unit 542, also help to emit light horizontally from the light-emitting surface 533, resulting in a longer illumination distance for the light emitted by the headlight 2 and improving the illumination effect of the headlight 2.
[0062] In one embodiment, the light guide surface 534 forms a second angle (not shown) with the vertical direction Z, the degree of which is between 5 and 10 degrees. The light emitting surface 533 forms a third angle (not shown) with the vertical direction Z, the degree of which is between 3 and 5 degrees. This helps to improve the brightness uniformity of the headlight 2 and the horizontality of the light emitted by the headlight 2, thereby improving the lighting effect of the headlight 2. It should be understood that in other embodiments, the second and / or third angles may be set to other degrees depending on the actual situation, and there is no limitation here.
[0063] In one embodiment, the distance between the third edge 537 and the first edge 535 is between 6 mm and 7 mm. The distance between the fourth edge 538 and the second edge 536 is between 2 mm and 2.5 mm. In some prior art automotive lights, to improve the brightness uniformity of the light guide plate, the thickness of the main body is increased (i.e., the distance between the light-emitting surface and the light-guiding surface is increased); for example, the minimum thickness of the main body of the light guide plate is approximately 10 mm. Compared with the light guide plates in the prior art, the thickness of the main body 53 of the light guide plate 5 in this application is smaller. This reduces the installation space required for the light guide plate 5 and also allows for more choices in the thickness size of the automotive light, thereby facilitating the application of the automotive light on vehicles.
[0064] like Figure 6 As shown, a pattern 539 is provided on the light-emitting surface 533. The pattern 539 is used to scatter the light passing through it. This increases the illumination area of the headlight 2 and improves the illumination effect of the headlight 2. However, depending on the actual situation, the pattern can be provided only in a part of the light-emitting surface, or the pattern can be left unprovided on the light-emitting surface, which will not be elaborated here.
[0065] For example Figure 2As shown, the vehicle lamp 2 also includes a bracket 201 and a functional plate 202 disposed within the chamber 30. The functional plate 202 is located between the light guide plate 5 and the housing 3. Light emitted from the light guide plate 5 changes certain properties (e.g., color) after passing through the functional plate 202 to meet specific requirements of the vehicle lamp 2. The functional plate 202 is well known to those skilled in the art and will not be described in detail here. The bracket 201 is generally located on the side of the light guide plate 5 facing away from the housing 3 and is used to fix and support the light guide plate 5.
[0066] For example Figure 3 As shown, the light guide plate 5 also includes a first extension 51 extending from the first end 531 of the main body 53. A light-incident surface 512 is provided on the first extension 51. In one embodiment, the first extension 51 extends substantially rearward along the second direction Y (i.e., away from the housing 3). After the light guide plate 5 is placed in the cavity 30, the light-incident surface 512 is aligned with the light source 4 so that the light emitted by the light source 4 enters the main body 53 of the light guide plate 5 through the light-incident surface 512. It should be understood that, depending on the actual situation, the first extension 51 may also be configured to extend in other directions.
[0067] For example Figure 3 As shown, a first mounting structure 511 is also provided on the first extension 51. Additionally, the light guide plate 5 includes a second extension 52 extending from the second end 532 of the main body 53. A second mounting structure 521 is provided on the second extension 52. For example, both the first mounting structure 511 and the second mounting structure 521 are mounting holes. In one embodiment, mounting structures (e.g., connecting pins, not shown in the figure) that match the first mounting structure 511 and the second mounting structure 521 are respectively constructed on the bracket 201 to stably mount the light guide plate 5 within the cavity 30.
[0068] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.
Claims
1. A vehicle light, characterized in that, The vehicle headlight (2) includes: The shell (3) defines the chamber (30); A light source (4) is disposed within the chamber (30); and A light guide plate (5) is disposed within the cavity (30); the light guide plate (5) includes a main body (53), the main body (53) comprising: The first end (531) is close to the light source (4); The second end (532) is away from the light source (4); The light-emitting surface (533) is located between the first end (531) and the second end (532); and The light guide surface (534) is located between the first end (531) and the second end (532) and is opposite to the light emitting surface (533); The light guide surface (534) is provided with a plurality of reflective structures (54), and each reflective structure (54) has a reflective surface (541) protruding from the light guide surface (534); the plurality of reflective structures (54) are arranged in parallel to a plurality of reflective units (542), and each reflective unit (542) forms an acute angle (θ) with a first direction (X) extending from the first end (531) toward the second end (532); the light emitted by the light source (4) is adapted to enter the main body (53), propagate uniformly in the main body (53) along the first direction (X), and be uniformly emitted from the light-emitting surface (533) along a second direction (Y) extending from the light-emitting surface (533) toward the housing (3).
2. The vehicle light according to claim 1, characterized in that, The acute angle (θ) is between 40 and 55 degrees.
3. The vehicle light according to claim 1, characterized in that, The light guide surface (534) has a first edge (535) at the first end (531) and a second edge (536) at the second end (532); The first edge (535) is located behind the second edge (536) along the second direction (Y), such that the light guide surface (534) is inclined relative to the vertical direction (Z).
4. The vehicle light according to claim 3, characterized in that, The light guide surface (534) forms a second angle with the vertical direction (Z), and the degree of the second angle is between 5 degrees and 10 degrees.
5. The vehicle light according to claim 3, characterized in that, The light-emitting surface (533) has a third edge (537) at the first end (531) and a fourth edge (538) at the second end (532); The third edge (537) is located behind the fourth edge (538) along the second direction (Y), such that the light-emitting surface (533) is inclined relative to the vertical direction (Z).
6. The vehicle light according to claim 5, characterized in that, The light-emitting surface (533) forms a third angle with the vertical direction (Z), and the degree of the third angle is between 3 and 5 degrees.
7. The vehicle light according to claim 5, characterized in that, The distance between the third edge (537) and the first edge (535) is between 6 mm and 7 mm, and the distance between the fourth edge (538) and the second edge (536) is between 2 mm and 2.5 mm.
8. The vehicle light according to claim 1, characterized in that, At least a portion of the light-emitting surface (533) is provided with a pattern (539), and the pattern (539) is adapted to scatter light passing through it.
9. The vehicle light according to claim 1, characterized in that, The light guide plate (5) also includes a first extension (51) extending from the first end (531) of the main body (53); A light-incident surface (512) is provided on the first extension (51); the light-incident surface (512) is aligned with the light source (4) so that the light emitted by the light source (4) enters the main body (53) of the light guide plate (5) through the light-incident surface (512).
10. The vehicle light according to claim 9, characterized in that, A first mounting structure (511) is also provided on the first extension (51); The light guide plate (5) further includes a second extension (52) extending from the second end (532) of the main body (53); a second mounting structure (521) is provided on the second extension (52).
11. A vehicle, characterized in that, The vehicle (1) includes a headlight (2) according to any one of claims 1 to 10.