Uniformly-lightened light guide device and lamp

Abstract

The invention provides a uniformly-lightened light guide device and a lamp, and belongs to the technical field of automobile lamps, the uniformly-lightened light guide device comprises a collimation part, a total-reflection dimming part, a light emitting part and a light source, the collimation part is used for converting light into parallel light, the total-reflection dimming part can reflect the parallel light, and then the parallel light is emitted out from the light emitting part; the design of the collimation part can enable subsequent light to have consistency and directivity, the collimation part plays a crucial role in subsequent light shape regulation and control, and because the light is reflected by all paraboloids on the total reflection dimming part, concentrated light energy which originally possibly forms bright spots is ingeniously dispersed when emitted from the light emitting part, and as a result, the light emitting efficiency is greatly improved. The light emitted from the light emitting part does not have obvious bright spots, and more uniform brightness distribution is realized in the whole irradiation area, so that the illumination effect and the safety of the vehicle during night driving are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile lamps and relates to a uniformly lit light guide device and a lamp. Background Art

[0002] As automobile styling becomes more diverse and complex, OEMs are paying more and more attention to the lighting appearance and lighting effects of lamps.

[0003] In actual use, car lights still face a significant problem, that is, the bright spots are too prominent. This problem not only affects the driver's visual experience, but may also cause glare interference to other road users, thereby reducing the safety of night driving. A solution currently commonly used in the industry is to add a pattern structure to the light outlet of the car light source to achieve the effect of diffusing light. This method introduces tiny textures or patterns to scatter the concentrated light emitted by the light source, aiming to weaken the contrast between bright and dark areas and make the light distribution look softer.

[0004] In summary, although some existing technical solutions have solved the problem of overly prominent bright spots, they can actually only cover the bright spots to a certain extent overall, and the light energy distribution is not uniform, leaving much room for improvement. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to provide a uniformly lit light guide device, comprising:

[0006] A collimating portion, which is used to convert the light into parallel light;

[0007] A total reflection dimming part, which is spliced ​​with the collimating part, the total reflection dimming part is provided with a plurality of paraboloids, the number of which is set to (2m-1)*(2n-1), and the paraboloids can reflect parallel light;

[0008] The light emitting portion is spliced ​​with the total reflection dimming portion, and the light reflected by the same parabola converges between the light emitting portion and the total reflection dimming portion.

[0009] In the above-mentioned uniformly lit light guide device, the collimating part includes a first receiving surface and a second receiving surface, the number of the second receiving surfaces is two, the two ends of the first receiving surface are respectively connected to one end of the two second receiving surfaces, the first receiving surface is set as a refractive surface, and the second receiving surface is set as a reflective surface.

[0010] In the above-mentioned uniformly lit light-guiding device, taking the m*nth parabola as an example, the focus of the parabola is set to the origin, the light-emitting direction is set to the X-axis, the direction parallel to the collimated light is set to the Y-axis, and the parabola equation of the parabola is y=1 / 4f*x^2-f, x<0, and f is the focal length of the parabola.

[0011] In the above-mentioned uniformly lit light guide device, the optical axis of the parabola in the edge area of ​​the total reflection dimming portion is slightly biased towards the optical axis of the parabola in the center area.

[0012] A uniformly lit light guide device is also provided, comprising:

[0013] A collimating portion, which is used to convert the light into parallel light;

[0014] A total reflection dimming part, which is spliced ​​with the collimating part, the total reflection dimming part is provided with a plurality of paraboloids, the number of which is set to (2m-1)*(2n-1), and the paraboloids can reflect parallel light;

[0015] The light emitting portion is spliced ​​with the total reflection dimming portion, and the reverse extension line of the light reflected by the same parabola converges at a side of the total reflection dimming portion away from the light emitting portion.

[0016] In the above-mentioned uniformly lit light guide device, the collimating part includes a first receiving surface and a second receiving surface, the number of the second receiving surfaces is two, the two ends of the first receiving surface are respectively connected to one end of the two second receiving surfaces, the first receiving surface is set as a refractive surface, and the second receiving surface is set as a reflective surface.

[0017] In the above-mentioned uniformly lit light-guiding device, taking the m*nth parabola as an example, the focus of the parabola is set to the origin, the light-emitting direction is set to the X-axis, the direction parallel to the collimated light is set to the Y-axis, and the parabola equation of the parabola is y=1 / (-4f)*x^2+f, x>0, and f is the focal length of the parabola.

[0018] In the above-mentioned uniformly lit light guide device, the optical axis of the parabola in the edge area of ​​the total reflection dimming portion is slightly biased towards the optical axis of the parabola in the center area.

[0019] In the above-mentioned uniformly lit light guide device, the light emitting portion is provided with a pattern.

[0020] Secondly, a uniformly lit lamp includes the uniformly lit light guide device, and further includes:

[0021] Light source, the light received by the collimating part is the light emitted by the light source.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The design of the collimating part can make the subsequent light consistent and directional, which plays a vital role in the subsequent light shape control. Since the light is reflected by the parabolic surfaces on the total reflection dimming part, the concentrated light energy that may originally form a bright spot is cleverly dispersed when it is emitted from the light emitting part. As a result, the light emitted from the light emitting part not only has no obvious bright spot, but also achieves a more uniform brightness distribution in the entire irradiated area, greatly improving the lighting effect and safety of the vehicle when driving at night.

[0024] 2. By adjusting the first receiving surface and the second receiving surface, the received light can propagate in an almost parallel manner, providing ideal conditions for subsequent optical operations, so that the light can be more accurately focused, diffused or modulated in other forms without being affected by the divergent characteristics of the initial light source.

[0025] 3. In the design of the total reflection dimming part, the optical axis of the parabola in the edge area is not completely aligned with the optical axis of the central area, but there is a slight deviation, and the angle produced should be less than 2°. The purpose of this design is to prevent the light at the edge from being reflected by the parabola and then contacting other parts of the light guide device before being emitted from the light output part, thereby causing reflection, and then causing uneven light distribution in the overall illumination area.

[0026] 4. Since the light reflected by the same parabola forms a virtual focus on the side of the reflective dimming part away from the light emitting part, the light passing through the same parabola is always in a diffuse state before and after being emitted from the light emitting part, making the light distribution in the overall irradiation area more uniform.

[0027] 5. The light source is located directly above the collimating part, so that the divergent light emitted by the light source will be received and corrected by the collimating part, and the subsequent light path will not be affected by reflections from other parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 It is a structural schematic diagram of the collimating part of the present invention.

[0030] Figure 3 It is a schematic diagram of Embodiment 1 of the present invention.

[0031] Figure 4 This is a schematic diagram of Embodiment 2 of the present invention.

[0032] In the figure:

[0033] 1. Collimation unit; 11. First receiving surface; 12. Second receiving surface; 2. Total reflection dimming unit; 21. Parabola; 3. Light output unit; 4. Light source. DETAILED DESCRIPTION

[0034] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "multiple" means at least two, for example two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly stipulated and limited, the terms "connection", "fixed" and the like should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0038] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The specific embodiments described in this article are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner, but they will not deviate from the present invention or exceed the scope defined by the attached claims.

[0040] Embodiment 1

[0041] like Figure 1-Figure 4As shown, a uniformly lit light guide device includes: a collimating part 1, a total reflection dimming part 2 and a light output part 3.

[0042] The collimating part 1 is used to convert light into parallel light.

[0043] The total reflection dimming part 2 is spliced ​​with the collimating part 1 , and the total reflection dimming part 2 is provided with a plurality of paraboloids 21 , the number of which is set to (2m-1)*(2n-1), and the paraboloids 21 can reflect parallel light.

[0044] The light emitting portion 3 is spliced ​​with the total reflection dimming portion 2 , and the light reflected by the same parabola 21 converges between the light emitting portion 3 and the total reflection dimming portion 2 .

[0045] Specifically, the light corrected by the collimating part 1 is all parallel light. At this time, the parallel light enters the total reflection dimming part 2 having multiple paraboloids 21 on the surface. At this time, the light reflected by the same parabola 21 will intersect before emitting the light emitting part 3, so that the light after emitting the light emitting part 3 will not produce bright spots.

[0046] In this embodiment, the design of the collimating portion 1 can make the subsequent light consistent and directional, which plays a vital role in the subsequent light shape control. Since the light is reflected by the various parabolic surfaces 21 on the total reflection dimming portion 2, the concentrated light energy that may originally form a bright spot is cleverly dispersed when it is emitted from the light emitting portion 3. As a result, the light emitted from the light emitting portion 3 not only has no obvious bright spot, but also achieves a more uniform brightness distribution in the entire irradiated area, greatly improving the lighting effect and safety of the vehicle when driving at night.

[0047] like Figure 1-Figure 4 As shown, on the basis of the above embodiment, the collimating portion 1 includes a first receiving surface 11 and a second receiving surface 12, the number of the second receiving surfaces 12 is two, the two ends of the first receiving surface 11 are respectively connected to one end of the two second receiving surfaces 12, the first receiving surface 11 is set as a refractive surface, and the second receiving surface is set as a reflective surface.

[0048] Specifically, the light received by the collimating portion 1 is generally divergent light. Light with a smaller angle deviation relative to vertical incidence on the collimating portion 1 will be refracted through the first receiving surface 11, and light with a larger angle relative to vertical incidence on the collimating portion 1 will first be refracted through the first receiving surface 11 and then reflected through the second receiving surface 12. This process ensures that all light directed toward the total reflection dimming component is ultimately adjusted to parallel light.

[0049] In this embodiment, by adjusting the first receiving surface 11 and the second receiving surface 12, the received light can propagate in an almost parallel manner, providing ideal conditions for subsequent optical operations, so that the light can be more accurately focused, diffused or modulated in other forms without being affected by the divergent characteristics of the initial light source 4.

[0050] like Figure 1-Figure 4 As shown, on the basis of the above implementation mode, taking the m*nth parabola 21 as an example, the focus of the parabola 21 is set to the origin, the light emitting direction is set to the X-axis, the direction parallel to the collimated light is set to the Y-axis, and the parabola equation of the parabola 21 is y=1 / 4f*x^2-f, x<0, and f is the focal length of the parabola 21.

[0051] Specifically, the focus f and x are best selected so that the emitted light just covers the entire light emitting area.

[0052] like Figure 1-Figure 4 As shown, based on the above embodiment, the optical axis of the parabola 21 in the edge area of ​​the total reflection dimming part 2 is slightly biased towards the optical axis of the parabola 21 in the center area.

[0053] In this embodiment, in the design of the total reflection dimming part 2, the optical axis of the parabola 21 in the edge area is not completely aligned with the optical axis of the central area, but there is a slight deviation, and the angle produced should be less than 2°. The purpose of this design is to prevent the light at the edge from being reflected by the parabola 21 and then contacting other parts of the light guiding device before being emitted from the light output part 3, thereby causing reflection, and then causing uneven light distribution in the overall illumination area.

[0054] Embodiment 2

[0055] like Figure 1-Figure 4 As shown, a uniformly lit light guide device includes: a collimating part 1, a total reflection dimming part 2 and a light output part 3.

[0056] The collimating part 1 is used to convert light into parallel light.

[0057] The total reflection dimming part 2 is spliced ​​with the collimating part 1 , and the total reflection dimming part 2 is provided with a plurality of paraboloids 21 , the number of which is set to (2m-1)*(2n-1), and the paraboloids 21 can reflect parallel light.

[0058] The light emitting portion 3 is spliced ​​with the total reflection dimming portion 2 , and the reverse extension lines of the light reflected by the same parabola 21 converge at a side of the total reflection dimming portion 2 away from the light emitting portion 3 .

[0059] Specifically, the light corrected by the collimating part 1 is all parallel light. At this time, the parallel light enters the total reflection dimming part 2 having multiple paraboloids 21 on the surface. At this time, the light reflected by the same parabola 21 will diffuse before emitting the light emitting part 3, so that the light after emitting the light emitting part 3 will not produce bright spots.

[0060] Preferably, in this embodiment, since the light reflected by the same parabola 21 forms a virtual focus on the side of the reflective dimming portion away from the light output portion 3, the light passing through the same parabola 21 is always in a diffuse state before and after being emitted from the light output portion 3, so that the light distribution in the overall illumination area is more uniform.

[0061] like Figure 1-Figure 4 As shown, on the basis of the above embodiment, the collimating portion 1 includes a first receiving surface 11 and a second receiving surface 12, the number of the second receiving surfaces 12 is two, the two ends of the first receiving surface 11 are respectively connected to one end of the two second receiving surfaces 12, the first receiving surface 11 is set as a refractive surface, and the second receiving surface is set as a reflective surface.

[0062] Specifically, the light received by the collimating portion 1 is generally divergent light. Light with a smaller angle deviation relative to vertical incidence on the collimating portion 1 will be refracted through the first receiving surface 11, and light with a larger angle relative to vertical incidence on the collimating portion 1 will first be refracted through the first receiving surface 11 and then reflected through the second receiving surface 12. This process ensures that all light directed toward the total reflection dimming component is ultimately adjusted to parallel light.

[0063] In this embodiment, by adjusting the first receiving surface 11 and the second receiving surface 12, the received light can propagate in an almost parallel manner, providing ideal conditions for subsequent optical operations, so that the light can be more accurately focused, diffused or modulated in other forms without being affected by the divergent characteristics of the initial light source 4.

[0064] like Figure 1-Figure 4 As shown, on the basis of the above implementation mode, taking the m*nth parabola 21 as an example, the focus of the parabola 21 is set to the origin, the light emitting direction is set to the X-axis, and the direction parallel to the collimated light is set to the Y-axis. The parabola equation of the parabola 21 is y=1 / (-4f)*x^2+f, x>0, and f is the focal length of the parabola 21.

[0065] Specifically, the focus f and x are best selected so that the emitted light just covers the entire light emitting area.

[0066] like Figure 1-Figure 4As shown, based on the above embodiment, the optical axis of the parabola 21 in the edge area of ​​the total reflection dimming part 2 is slightly biased towards the optical axis of the parabola 21 in the center area.

[0067] In the design of the total reflection dimming part 2, the optical axis of the parabola 21 in the edge area is not completely aligned with the optical axis of the central area, but there is a slight deviation, and the angle produced should be less than 2°. The purpose of this design is to prevent the light at the edge from being reflected by the parabola 21 and then contacting other parts of the light guiding device before being emitted from the light output part 3, thereby causing reflection, and then causing uneven light distribution in the overall illumination area.

[0068] like Figure 1-Figure 4 As shown, based on the above embodiment, the light emitting portion 3 is provided with a pattern.

[0069] In this embodiment, these patterns are not only decorative elements, they also play an important role in optical performance. Through carefully designed patterns, the distribution and propagation characteristics of light can be effectively affected, thereby achieving a more uniform lighting effect.

[0070] like Figure 1-Figure 4 As shown, a uniformly lit lamp includes the uniformly lit light guide device and a light source 4 . The light received by the collimating portion 1 is the light emitted by the light source 4 .

[0071] In this embodiment, the light source 4 is located directly above the collimating portion 1 , so that the divergent light emitted by the light source 4 will be received and corrected by the collimating portion 1 , and will not affect the subsequent light path due to reflection from other parts.

Claims

1. A uniformly lit light guide device, characterized in that: include: A collimating portion, which is used to convert the light into parallel light; A total reflection dimming part, which is spliced ​​with the collimating part, the total reflection dimming part is provided with a plurality of paraboloids, the number of which is set to (2m-1)*(2n-1), and the paraboloids can reflect parallel light; The light emitting portion is spliced ​​with the total reflection dimming portion, and the light reflected by the same parabola converges between the light emitting portion and the total reflection dimming portion.

2. A uniformly lit light guide device as claimed in claim 1, characterized in that: The collimating portion includes a first receiving surface and a second receiving surface. There are two second receiving surfaces. Both ends of the first receiving surface are respectively connected to one end of two second receiving surfaces. The first receiving surface is set as a refractive surface, and the second receiving surface is set as a reflective surface.

3. A uniformly lit light guide device as claimed in claim 1, characterized in that: Taking the m*nth parabola as an example, the focus of the parabola is set to the origin, the light emitting direction is set to the X-axis, the direction parallel to the collimated light is set to the Y-axis, and the parabola equation of the parabola is y=1 / 4f*x^2-f, x<0, and f is the focal length of the parabola.

4. A uniformly lit light guide device as claimed in claim 1, characterized in that: The optical axis of the parabola in the edge area of ​​the total reflection dimming portion is slightly biased toward the optical axis of the parabola in the center area.

5. A uniformly lit light guide device, characterized in that: include: A collimating portion, which is used to convert the light into parallel light; A total reflection dimming part, which is spliced ​​with the collimating part, the total reflection dimming part is provided with a plurality of paraboloids, the number of which is set to (2m-1)*(2n-1), and the paraboloids can reflect parallel light; The light emitting portion is spliced ​​with the total reflection dimming portion, and the reverse extension line of the light reflected by the same parabola converges at a side of the total reflection dimming portion away from the light emitting portion.

6. A uniformly lit light guide device as claimed in claim 5, characterized in that: The collimating portion includes a first receiving surface and a second receiving surface. There are two second receiving surfaces. Both ends of the first receiving surface are respectively connected to one end of two second receiving surfaces. The first receiving surface is set as a refractive surface, and the second receiving surface is set as a reflective surface.

7. A uniformly lit light guide device as claimed in claim 5, characterized in that: Taking the m*nth parabola as an example, the focus of the parabola is set to the origin, the light emitting direction is set to the X-axis, the direction parallel to the collimated light is set to the Y-axis, and the parabola equation of the parabola is y=1 / (-4f)*x^2+f, x>0, and f is the focal length of the parabola.

8. A uniformly lit light guide device as claimed in claim 5, characterized in that: The optical axis of the parabola in the edge area of ​​the total reflection dimming portion is slightly biased toward the optical axis of the parabola in the center area.

9. A uniformly lit light guide device as claimed in claim 5, characterized in that: The light emitting portion is provided with a pattern.

10. A uniformly lit lamp, characterized in that: The device comprises a uniformly lit light guide device according to any one of claims 1 to 9, and further comprises: Light source, the light received by the collimating part is the light emitted by the light source.

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