TWM618345U - Linear light guide system - Google Patents

Abstract

A linear light guide system includes a light guide and at least one first light source. The light guide has a light incident surface, a light-emitting surface, and a first reflective surface. The reflective surface is connected to a bottom edge of the light incident surface and a bottom edge of the light-emitting surface. The light incident surface is a concave surface. A cross section of the first reflective surface is a convex surface. The first light source faces toward the light incident surface and has a light collector. An angle between a light axis of the first light source and a horizontal line is in a range from 25 degrees to 53 degrees. The light guide is configured to receive a light emitted from the light collector such that the light enters the light-emitting surface and is reflected by the first reflective surface to the light-emitting surface to irradiate.

Description

Linear light guide system

This disclosure is about a linear light guide system.

Generally speaking, automobile and locomotives are designed to be equipped with lights with different functions, such as headlights, fog lights and direction lights. The headlight assembly may include the above-mentioned light source, reflector cup, heat sink, lens and other structures. In recent years, light-emitting diodes (LEDs) have been widely used in headlight assemblies as light sources to reduce heat generation and increase brightness. For example, white light LEDs are used as headlights.

However, it is still difficult to reduce the volume of the headlight assembly, which is particularly unfavorable for miniaturization of depth and thickness. In addition, the appearance shapes of automobile headlights, fog lamps, and direction lamps are not easy to design into linear and continuous appearance surfaces, and it is impossible to integrate multi-functional lamp types to use the same continuous light-emitting surface to emit light.

One technical aspect of this disclosure is a linear light guide system.

According to some embodiments of the present disclosure, a linear light guide system includes a light guide and at least one first light source. The light guide has a light incident surface, a light exit surface and a first reflecting surface. The first reflecting surface connects the lower edge of the light-incident surface and the lower edge of the light-emitting surface. The cross section of the light incident surface is concave. The first reflecting surface is convex. The first light source faces the light incident surface and has a light collector. The angle between the optical axis of the first light source and the horizontal line is in the range of 25 degrees to 53 degrees. The light guide is configured to receive the light emitted from the light collector so that the light enters from the light-incident surface and is reflected from the first reflecting surface to the light-emitting surface to emit light.

In some embodiments, the height of the light exit surface is in the range of 10 mm to 20 mm, and the distance between the first light source and the light incident surface is in the range of 2 mm to 10 mm.

In some embodiments, the light guide member further has a second reflective surface. The second reflecting surface connects the upper edge of the light-incident surface and the upper edge of the light-emitting surface.

In some embodiments, the second reflective surface of the light guide member is a discontinuous cross section formed by a flat surface, a convex surface, a concave surface, or a combination of the foregoing.

In some embodiments, the edge of the second reflective surface of the light guide connected to the light incident surface is linear or arc-shaped.

In some embodiments, when the edge of the second reflective surface of the light guide is arc-shaped, the edge of the second reflective surface has a tangent angle in the range of 3 degrees to 42 degrees.

In some embodiments, the linear light guide system described above includes a second light source. The second light source is located above the second reflection surface of the light guide.

In some embodiments, the edge of the first reflective surface of the light guide member connected to the light incident surface is linear or arc-shaped.

In some embodiments, the light-emitting surface of the light guide member has a plurality of elongated light-emitting structures, a plurality of hexagonal light-emitting structures, or a plurality of square light-emitting structures.

In some embodiments, the number of the aforementioned first light sources is plural, and these first light sources include at least two of direction lights, low beam lights, high beam lights, fog lights, daytime running lights, and position lights.

In the above-mentioned embodiments of the present disclosure, since the cross section of the light incident surface of the light guide member of the linear light guide system is concave, the first reflective surface is convex, and the angle between the optical axis of the first light source and the horizontal line is between 25 degrees and In the range of 53 degrees, when the light from the first light source is emitted from the light collector, the light can enter from the light incident surface of the light guide and be reflected from the first reflective surface, and then be transmitted to the light output surface to emit light. With this design, the light collector can effectively improve the light utilization rate and effectively reduce the LED half-angle. In addition, the light-emitting surface size (such as height) of the light guide can not only be reduced, but also the appearance shape of the headlights, daytime running lights, fog lights, direction lights and position lights can be designed into a linear and continuous appearance surface (ie. The light-emitting surface of the light guide member), to integrate the multi-function lamp type and use the same continuous light-emitting surface to emit light.

The implementation content disclosed below provides many different implementations, or examples, for implementing different features of the provided subject matter. Specific examples of components and arrangements are described below to simplify the case. Of course, these examples are only examples and are not intended as limitations. In addition, in this case, component symbols and/or letters may be repeated in each instance. This repetition is used for simplicity and clarity, and does not in itself specify the relationship between the various embodiments and/or configurations discussed.

Spatially relative terms such as "below", "below", "lower", "above", "upper" and so on can be used in this article for the purpose of description, to describe The relationship between one element or feature and another element or feature is shown in the drawings. The spatial relative terms are intended to cover different orientations of the device in use or operation in addition to the orientations shown in the figures. The device can be oriented in other ways (rotated by 90 degrees or in other orientations) and the spatial relative descriptors used herein can also be interpreted accordingly.

FIG. 1 is a perspective view of a linear light guide system 100 according to an embodiment of the present disclosure. FIG. 2 shows a side view of the linear light guide system 100 of FIG. 1. FIG. Referring to FIGS. 1 and 2 at the same time, the linear light guide system 100 includes a light guide 110 and at least one first light source 120. The light guide 110 has a light incident surface 112, a light output surface 114 and a first reflective surface 116. The first reflective surface 116 connects the lower edge of the light incident surface 112 and the lower edge of the light exit surface 114. The cross section of the light incident surface 112 is a concave surface. The first reflective surface 116 is a convex surface. The inner side of the first reflective surface 116 may be a plating layer or a mirror surface. The first light source 120 faces the light incident surface 112. The first light source 120 includes a combination of a light-emitting diode 122 and a light collector 124. The included angle θ1 between the optical axis O of the first light source 120 and the horizontal line h is in the range of 25 degrees to 53 degrees. The material of the light guide 110 can be polycarbonate (PC), acrylic or silicon, but it is not used to limit the disclosure.

The light guide 110 is configured to receive the light L1, L2, L3 emitted from the light collector 124 so that the light L1, L2, L3 can enter from the light incident surface 112 and be reflected from the first reflective surface 116 to the light exit surface 114 to emit light. The first light source 120 and the light rays L1, L2, L3 in FIG. 2 are only for illustration, and the number thereof is not used to limit the present disclosure. The light guide 110 can cause total internal reflection of light entering it, and the curvature of the first reflective surface 116 can be designed to control the light exit angle.

In this embodiment, the height H of the light exit surface 114 of the light guide 110 may be in the range of 10 mm to 20 mm. For example, the height H of the light-emitting surface 114 may be 19 mm, and the length L may be 70 mm, so the light-emitting surface 114 may be elongated. In addition, the distance d between the first light source 120 and the light incident surface 112 may be in the range of 2 mm to 10 mm. The overall depth D of the linear light guide system 100 may be 51 mm. Through the above configuration, the miniaturization of the linear light guide system 100 is facilitated.

Since the cross section of the light incident surface 112 of the light guide 110 of the linear light guide system 100 is concave, the first reflective surface 116 is convex, and the angle θ1 between the optical axis O of the first light source 120 and the horizontal line h is between 25 degrees and In the range of 53 degrees, when the light L1, L2, L3 of the first light source 120 is emitted from the light collector 124, the light L1, L2, L3 can enter from the light incident surface 112 of the light guide 110 and exit from the first reflecting surface 116 reflects, and then transmits to the light-emitting surface 114 to emit light. With such a design, the light concentrator 124 can effectively improve the light utilization rate and effectively reduce the half-angle of the LED, for example, the half-angle of the light-emitting diode 122 is reduced from 120 degrees to 60 degrees. In addition, the size (for example, height H) of the light-emitting surface 114 of the light guide 110 can not only be effectively reduced, but also can be used for automobile headlights (including high beam and low beam), daytime running lights, fog lights, direction lights and The appearance shape of the position lamp can be further designed as a linear and continuous appearance surface (ie, the light-emitting surface 114 of the light guide 110), so as to integrate the multi-functional lamp type and utilize the same continuous light-emitting surface 114 to emit light.

In this embodiment, the light guide 110 further has a second reflective surface 118. The inner side of the second reflective surface 118 may be a plating layer or a mirror surface. The second reflective surface 118 connects the upper edge of the light incident surface 112 and the upper edge of the light exit surface 114. The second reflective surface 118 of the light guide 110 can be used for light reflection, and can be a flat surface, a convex surface, a concave surface, or a combination of the above. In this embodiment, the edges of the first reflective surface 116 of the light guide 110 connected to the light incident surface 112 and the light exit surface 114 are linear, and the second reflective surface 118 of the light guide 110 is connected to the light incident surface 112. Both edges of the light emitting surface 114 and the light emitting surface 114 are linear.

FIG. 3 is a top view of the linear light guide system 100 of FIG. 1. FIG. FIG. 4 shows the light intensity distribution diagram of the linear light guide system 100 shown in FIG. 1 when irradiating the wall surface. Referring to FIGS. 3 and 4 at the same time, when the light rays L4, L5, L6, L7 of the first light source 120 enter from the light-incident surface 112 of the light guide 110, they can be transmitted to the light-emitting surface 114 by internal reflection and pass through the light-emitting surface. The surface 114 refracts light. After the light rays L4, L5, L6, and L7 are irradiated on the wall, the light intensity distribution diagram of Figure 4 can be obtained by measurement. The light band (see Figure 4) generated by the linear light guide system 100 has a cut-off line effect.

The horizontal and vertical axes in Figure 4 indicate positions, and each line represents the same light intensity. In Figure 4, the lines (light strips) surrounding from the inside to the outside can be 3000cd, 2500 cd, 2000 cd, 1500 cd, 1000 cd and 500 cd in sequence, and from the inside to the outside can be light L4, L5, L6 in sequence , L7 irradiated area.

Refer to Figures 2 and 4 at the same time. In addition, the light rays L1, L2, and L3 in Figure 2 are refracted from the light-emitting surface 114 of the light guide 110 and irradiated on the wall surface. , L2, L3 irradiated area.

5 to 9 are perspective views of light guides 110a, 100b, 110c, 110d, and 110e according to various embodiments of the present disclosure. Referring to FIG. 5, the difference from the embodiment in FIG. 1 is that the light guide 110a in FIG. 5 extends along a curve. For example, the edges of the second reflective surface 118 of the light guide 110a connected to the light incident surface 112 and the light exit surface 114 are arc-shaped, and the first reflective surface 116 is connected to the light incident surface 112 and the light exit surface 114, respectively. The two edges are also curved.

Referring to FIG. 6, the difference from the embodiment in FIG. 1 is that the second reflective surface 118 of the light guide 110b in FIG. 6 is a combination of a convex surface and a flat surface, and the flat surface is located between the two convex surfaces. In this way, the second reflective surface 118 is a discontinuous cross-section formed by a combination of a flat surface and two convex surfaces.

Referring to FIG. 7, the difference from the embodiment in FIG. 1 is that the light-emitting surface 114 of the light guide 110 c in FIG. 7 has a plurality of elongated light-emitting structures 115. The elongated light-emitting structure 115 is helpful for the light diffusion of the light-emitting surface 114.

Referring to FIG. 8, the difference from the embodiment in FIG. 7 is that the light-emitting surface 114 of the light guide 110d in FIG. 8 has a plurality of hexagonal light-emitting structures 115a. The hexagonal light-emitting structure 115a is helpful for the light homogenization of the light-emitting surface 114.

Referring to FIG. 9, the difference from the embodiment in FIG. 7 is that the light emitting surface 114 of the light guide 110 e in FIG. 9 has a plurality of square light emitting structures 115 b. The square light-emitting structure 115b is helpful for the light homogenization of the light-emitting surface 114.

FIG. 10 is a perspective view of a linear light guide system 100a according to an embodiment of the present disclosure. As shown in the figure, the linear light guide system 100 includes a light guide 110f and a plurality of first light sources 120a, 120b, and 120c. In this embodiment, the types of the first light sources 120a, 120b, and 120c are different. The first light sources 120a, 120b, and 120c may include at least two of direction lights, low beam lights, high beam lights, fog lights, daytime running lights, and position lights. For example, the first light source 120a may be a direction lamp or a fog lamp, the first light source 120b may be a high beam lamp, and the first light source 120c may be a low beam lamp, but the arrangement is not intended to limit the disclosure. In addition, in this embodiment, the edge of the second reflective surface 118 of the light guide 110f connected to the light incident surface 112 has an arc-shaped central portion, and the arc-shaped edge of the second reflective surface 118 has a range of 3 degrees to 42 degrees. The tangent angle of θ2. Such a design can help a light source for a specific purpose form a suitable light band.

FIG. 11 shows a side view of a linear light guide system 100b according to an embodiment of the present disclosure. As shown in the figure, the linear light guide system 100b includes a light guide 110g and a first light source 120. The difference from the embodiment in FIG. 2 is that the second reflective surface 118a of the light guide 100g is a concave surface and the linear light guide system 100b further includes a second light source 120d. The outer side of the second reflective surface 118a may be a plating layer or a mirror surface. The second light source 120d is located above the second reflective surface 118a of the light guide 110g. When the second light source 120d emits light, the light rays La, Lb, and Lc can be reflected by the second reflecting surface 118a to provide light rays having different purposes or irradiation positions than the light rays L1, L2, L3.

FIG. 12 is a side view of the linear light guide system 100c according to an embodiment of the present disclosure. As shown in the figure, the linear light guide system 100c includes a light guide 110h and a first light source 120. The first reflective surface 116 of the light guide 110h may be a mirror surface or an electroplated surface. The difference from the embodiment in FIG. 2 is that the second reflective surface 118b of the light guide 100h is a combination of a flat surface and a convex surface, and the linear light guide system 100c further includes a second light source 120e. For example, the front half of the second reflective surface 118b close to the light-emitting surface 114 is an inclined surface, and the rear half close to the light-incident surface 112 is a convex island shape. The second light source 120e is located on the island-shaped structure of the second reflective surface 118b of the light guide 110h. When the second light source 120e emits light, the light rays Ld, Le, and Lf can be reflected by the first reflecting surface 116 to provide light with different purposes or illumination positions than the light rays L1, L2, L3.

FIG. 13 is a side view of the light guide 110i according to an embodiment of the present disclosure. The light guide 110 i has a light incident surface 112, a light exit surface 114, a first reflective surface 116 and a second reflective surface 118. The difference from the embodiment in FIG. 1 is that the edge of the second reflective surface 118 of the light guide 110i connected to the light incident surface 112 is arc-shaped. In this embodiment, the cross section of the light incident surface 112 is a concave surface, but the upper edge of the light incident surface 112 is convex when viewed from a plan view.

The foregoing outlines the features of several embodiments, so that those skilled in the art can better understand the aspects of the present disclosure. Those skilled in the art should understand that they can easily use the present disclosure as a basis for designing or modifying other processes and structures to achieve the same purpose and/or the same advantages as the embodiments introduced herein. Those skilled in the art should also realize that such equivalent structures do not depart from the spirit and scope of the present disclosure, and they can make various changes, substitutions and alterations herein without departing from the spirit and scope of the present disclosure.

100, 100a, 100b, 100c: linear light guide system 110,110a~110i: light guide 112: Glossy surface 114: Glossy Surface 115, 115a, 115b: light emitting structure 116: first reflecting surface 118, 118a, 118b: second reflecting surface 120, 120a, 120b, 120c: the first light source 120d, 120e: second light source 122: LED 124: Concentrator D: depth d: distance H: height h: horizontal line L: length L1, L2, L3, L4, L5, L6, L7, La, Lb, Lc, Ld, Le, Lf: light O: Optical axis θ1: included angle θ2: Tangent angle

When read together with the accompanying illustrations, the state of the present disclosure can be best understood by the following embodiments. Note that according to standard practice in this industry, the various features are not drawn to scale. In fact, for clarity of discussion, the size of various features can be increased or decreased arbitrarily. FIG. 1 is a perspective view of a linear light guide system according to an embodiment of the present disclosure. Figure 2 shows a side view of the linear light guide system of Figure 1. Figure 3 shows the top view of the linear light guide system of Figure 1. Figure 4 shows the light intensity distribution of the linear light guide system shown in Figure 1 when irradiating the wall. 5 to 9 are perspective views of light guides according to various embodiments of the present disclosure. FIG. 10 is a perspective view of a linear light guide system according to an embodiment of the present disclosure. FIG. 11 shows a side view of a linear light guide system according to an embodiment of the present disclosure. FIG. 12 is a side view of the linear light guide system according to an embodiment of the present disclosure. FIG. 13 is a side view of a light guide according to an embodiment of the present disclosure.

100: Linear light guide system

110: Light guide

112: Glossy surface

114: Glossy Surface

116: first reflecting surface

118: second reflecting surface

120: The first light source

122: LED

124: Concentrator

D: depth

H: height

L: length

Claims (10)

A linear light guide system, including: A light guide has a light incident surface, a light exit surface, and a first reflective surface, wherein the first reflective surface connects the lower edge of the light incident surface and the lower edge of the light exit surface, and the cross section of the light incident surface Is a concave surface, and the first reflective surface is a convex surface; and At least one first light source faces the light incident surface and has a light collector. The angle between the optical axis of the first light source and a horizontal line is in the range of 25 degrees to 53 degrees, wherein the light guide is configured to Receiving a light ray emitted from the light collector causes the light to enter from the light-incident surface and reflect from the first reflective surface to the light-emitting surface to emit light. The linear light guide system according to claim 1, wherein the height of the light exit surface is in the range of 10 mm to 20 mm, and the distance between the first light source and the light entrance surface is in the range of 2 mm to 10 mm. The linear light guide system according to claim 1, wherein the light guide member further has a second reflective surface, and the second reflective surface connects the upper edge of the light-incident surface and the upper edge of the light-emitting surface. The linear light guide system according to claim 3, wherein the second reflective surface of the light guide member is a non-continuous cross section formed by a flat surface, a convex surface, a concave surface, or a combination of the foregoing. The linear light guide system according to claim 3, wherein an edge of the second reflective surface of the light guide member connected to the light incident surface is linear or arc-shaped. The linear light guide system according to claim 5, wherein when the edge of the second reflective surface of the light guide is arc-shaped, the edge of the second reflective surface has a tangent in the range of 3 degrees to 42 degrees Angle. The linear light guide system as described in claim 3, including: A second light source is located above the second reflection surface of the light guide. The linear light guide system according to claim 1, wherein an edge of the first reflective surface of the light guide member connected to the light incident surface is linear or arc-shaped. The linear light guide system according to claim 1, wherein the light emitting surface of the light guide has a plurality of long strip light emitting structures, a plurality of hexagonal light emitting structures or a plurality of square light emitting structures. The linear light guide system according to claim 1, wherein the number of the first light sources is plural, and the first light sources include at least direction lights, low beam lights, high beam lights, fog lights, daytime running lights, and position lights Two of them.

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