JP2017195147A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture which suppresses light emission in an unintended region by leakage light for achieving various light emission shapes.SOLUTION: A lighting fixture includes: a light guide body in which a plate-like first light guide part and a plate-like second light guide part are integrally connected; a first light source for allowing light to enter the first light guide part; and a second light source for allowing light to enter the second light guide part. The first light guide part has: a reflection surface for internally reflecting the light which has entered; and a first emission part extending in a first direction and for emitting the light internally reflected on the reflection surface. The second light guide part includes a second emission part extending in a second direction crossing the first direction. The first and second emission parts emit light in a common emission direction, and with respect to the reflection surface of the first light guide part, an incident part of the second light guide part is located at the back of the emission direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a lamp.

  Patent Document 1 describes a lamp that includes a light guide that reflects and refracts light incident from an LED light source to form a predetermined light emission shape.

JP2015-167124A

  Conventional lamps have to be used in combination with a plurality of light guides in order to realize a complicated light emission shape. In this case, there is a problem that light passing through the light guide leaks to the adjacent light guide (leakage light is generated), and an unintended region emits light.

  This invention is proposed in view of such a subject, and it aims at provision of the lamp which suppresses light emission of the unintended area | region by leakage light while implement | achieving various light emission shapes.

  A lamp according to an aspect of the present invention includes a light guide body in which a plate-like first light guide portion and a plate-like second light guide portion are integrally connected, and light in the first light guide portion. And a second light source that causes light to be incident on the second light guide, and the first light guide includes a reflective surface that internally reflects the incident light; A first light emitting part that emits light that has been reflected from the reflection surface and extends in the first direction, and the second light guide part is arranged in a second direction that intersects the first direction. The first and second light emitting portions emit light in a common light emitting direction, and the second light guide portion extends toward the reflection surface of the first light guide portion. The incident part of the light part is located behind the emission direction.

According to said structure, the 1st and 2nd radiation | emission part which mutually cross | intersects can be light-emitted. Also, by turning on and off each light source, various light emission patterns such as a straight line extending in one direction or a cross shape can be formed.
Moreover, according to said structure, the incident part of a 2nd light guide part is located behind the reflective surface of a 1st light guide part, A 1st light guide part and a 2nd light guide part The connecting portion can be made small. Thereby, it can suppress that light leaks from one to the other among the 1st and 2nd light guide parts. Furthermore, when mounting a 2nd light source on a board | substrate, a board | substrate can be located in the back of a 2nd light guide part. Therefore, when a plurality of second light guides are provided, a plurality of second light sources can be mounted on the same substrate, and the number of components can be reduced to provide an inexpensive lamp.

  In the lamp, the second emission part may be positioned rearward in the emission direction with respect to the first emission part.

  According to said structure, the light which passes the inside of a 1st light guide part is hard to be radiate | emitted from a 2nd output part. That is, when the first light source is turned on and the second light source is turned off, only the first emission part can emit light and light emission of the second emission part can be suppressed.

  In the lamp, the first and second light sources may be mounted on the same substrate, and the incident portions of the first and second light guides may be directed in the same direction.

  According to said structure, since the 1st and 2nd light source can be arrange | positioned on the same board | substrate, the number of board | substrates can be reduced and an inexpensive lamp can be provided.

  In the lamp, either one or both of the first and second light guides may have a configuration in which a plate thickness is partially reduced at each connection part.

  According to said structure, it can suppress that light leaks from one side to the other among the 1st and 2nd light guide parts by making the magnitude | size of a connection part small.

  ADVANTAGE OF THE INVENTION According to this invention, the lamp | ramp which implement | achieves various light emission shapes and suppresses light emission of the area | region which is not intended by leakage light can be provided.

The front view of the lamp of 1st Embodiment. Sectional drawing which follows the II-II line | wire of FIG. Sectional drawing which follows the III-III line of FIG. Sectional drawing which shows the 2nd light guide part of the modification 1 and the modification 2 which can be employ | adopted as the lamp of 1st Embodiment. The front view of the lamp of 2nd Embodiment. The front view of the lamp of 3rd Embodiment. Sectional drawing which follows the VII-VII line of FIG.

Hereinafter, the lamp of the embodiment will be described with reference to the drawings.
In addition, in the drawings used in the following description, in order to make the features easy to understand, there are cases where the portions that become the features are enlarged for the sake of convenience, and the dimensional ratios of the respective components are not always the same as the actual ones. Absent.
In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system.

<First Embodiment>
1 is a front view of the lamp 1 according to the first embodiment, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III in FIG. .
For example, the lamp 1 is mounted on a vehicle and can be used as a turn lamp, a tail lamp, or a stop lamp. In addition, the lamp 1 may be used as interior lighting or air conditioner panel lighting in a vehicle. Further, the lamp 1 may be used as an indicator and decorative lighting for a copying machine, a multifunction machine, and a gaming machine.

The lamp 1 includes a first light source unit 17 on which four first LED light sources (first light sources) 18 are mounted, and a second on which three second LED light sources (second light sources) 28 are mounted. The light source unit 27 and the light guide 2 that irradiates the light emitted from the first and second LED light sources 18 and 28 forward (in the + Y direction).
Hereinafter, each part will be described more specifically. In this specification, the direction in which light is irradiated (that is, the + Y direction) in the horizontal plane (XY plane) is defined as the front, and the opposite direction (that is, the −Y direction) is defined as the rear. Further, a direction (± X axis direction) orthogonal to the light irradiation direction in the horizontal plane is defined as the left-right direction. Further, the vertical direction (Z-axis direction) is the vertical direction.

<First light source unit>
The first light source unit 17 includes a circuit board (board) 19 and four first LED light sources 18 mounted on the circuit board 19. The circuit board 19 is located above the light guide 2. The circuit board 19 is disposed in parallel with the horizontal plane. The four first LED light sources 18 are linearly arranged in the left-right direction (X-axis direction) of the lamp 1. The first LED light source 18 emits light downward.

<Second light source unit>
The second light source unit 27 includes a circuit board (board) 29 and three second LED light sources 28 mounted on the circuit board 29. The circuit board 29 is located behind the light guide 2. The circuit board 29 is arranged in a direction orthogonal to the horizontal plane. The circuit board 29 has the surface on which the second LED light source 28 is mounted facing forward. The second LED light source 28 emits light forward.

<Light guide>
The light guide 2 is made of a transparent resin material such as acrylic. The light guide 2 is configured by integrally connecting four first light guides 10 and three second light guides 20. The first light guide unit 10 and the second light guide unit 20 are arranged in order in the horizontal direction. In other words, the second light guide 20 is disposed between the pair of first light guides 10. A connecting portion 3 is formed at the boundary between the first light guide portion 10 and the second light guide portion 20.

<First light guide unit>
The first light guide unit 10 has a plate shape extending in the vertical direction (first direction). As shown in FIG. 3, the first light guide unit 10 includes an incident unit 11, a reflective surface 12, and a first output surface (first output unit) 13. The incident portion 11, the reflection surface 12, and the first emission surface 13 are each located on the outer peripheral surface orthogonal to the plate thickness direction of the first light guide portion 10.

  The incident portion 11 of the first light guide 10 is located on the upper surface of the first light guide 10. The incident part 11 faces the first LED light source 18. The light emitted from the first LED light source 18 enters the first light guide unit 10 from the incident unit 11.

  The reflective surface 12 of the first light guide unit 10 is a rearwardly convex paraboloid. The surface direction of the reflecting surface 12 faces the rear and the lower side of the first light guide unit 10. Light incident on the first light guide unit 10 through the incident unit 11 enters the reflecting surface 12. The reflecting surface 12 internally reflects light (total reflection) and emits the light forward as parallel light (parallel light) when viewed from the left-right direction.

  The first light exit surface 13 of the first light guide unit 10 causes the parallel light reflected by the reflective surface 12 to exit from the first light guide unit 10. The 1st output surface 13 is formed in the planar shape orthogonal to the advancing direction of parallel light. The first emission surface 13 faces forward. The first emission surface 13 extends in the up-down direction (first direction).

<Second light guide unit>
The second light guide 20 has a plate shape extending in the left-right direction (second direction). As shown in FIG. 2, the second light guide unit 20 includes an incident unit 21, a reflection surface 22, and a second emission surface (second emission unit) 23. The incident portion 21, the reflection surface 22, and the second emission surface 23 are respectively located on the outer peripheral surface orthogonal to the plate thickness direction of the second light guide portion 20.

  The incident portion 21 of the second light guide 20 is located on the rear surface of the second light guide 20. The incident portion 21 faces the second LED light source 28. The light emitted from the second LED light source 28 enters the second light guide unit 20 from the incident unit 21.

  The incident portion 21 of the second light guide 20 has a central incident surface 21a and a peripheral incident surface 21b. The central incident surface 21a and the peripheral incident surface 21b have a uniform shape in the thickness direction. The optical axis J28 of the second LED light source 28 passes through the central incident surface 21a. The central incident surface 21 a has a parabolic shape centered on the optical axis J <b> 28 of the second LED light source 28. The peripheral incidence surface 21b is located on both the left and right sides with respect to the central incidence surface 21a and is formed symmetrically. The peripheral incident surface 21b has a flat surface inclined with respect to the optical axis J28.

Of the light emitted from the second LED light source 28, light having a relatively small emission angle is incident on the central incident surface 21a. The focal point of the central incident surface 21 a substantially coincides with the center of the second LED light source 28. For this reason, the central incident surface 21a refracts the incident light so as to be substantially parallel light. That is, the central incident surface 21a emits incident light forward as parallel light.
On the other hand, light having a relatively large emission angle of light emitted from the second LED light source 28 enters the peripheral incident surface 21b. The light incident from the peripheral incident surface 21 b is incident on the reflecting surface 22.

  The reflection surfaces 22 of the second light guide unit 20 are located on both sides of the incident unit 21 in the left-right direction and are formed symmetrically. The reflecting surface 22 has a parabolic shape centered on the optical axis J28 of the second LED light source 28. Light that has entered the inside of the second light guide portion 20 enters the reflective surface 22 via the peripheral incidence surface 21b. The reflecting surface 22 internally reflects (totally reflects) the light, and emits the light forward as parallel light (parallel light) when viewed in the vertical direction.

  The second light exit surface 23 of the second light guide 20 emits the parallel light reflected by the reflective surface 22 from the second light guide 20. The 2nd output surface 23 is formed in the planar shape orthogonal to the advancing direction of parallel light. The second emission surface 23 faces forward. The second emission surface 23 extends in the left-right direction (second direction). Note that the direction in which the second emission surface 23 extends (second direction) may not be orthogonal as long as it intersects with the direction in which the first emission surface 13 extends (first direction). The second emission surface 23 emits light in the same emission direction as the first emission surface 13.

Next, the positional relationship in the front-rear direction of each part of the first and second light guides 10 and 20 will be described.
As shown in FIGS. 2 and 3, the second emission surface 23 is located rearward in the emission direction with respect to the first emission surface 13. For this reason, it is difficult for light passing through the inside of the first light guide 10 to be emitted from the second emission surface 23. That is, when the first LED light source 18 is turned on and the second LED light source 28 is turned off, only the first emission surface 13 can emit light and light emission of the second emission surface 23 can be suppressed.

  The incident portion 21 of the second light guide 20 is located behind the reflecting surface 12 of the first light guide 10 in the emission direction. For this reason, it becomes possible to make the connection part 3 of the 1st and 2nd light guide parts 10 and 20 small. As a result, light is less likely to leak from the first light guide 10 to the second light guide 20. Similarly, light is less likely to leak from the second light guide 20 to the first light guide 10. In general, when the two light guides are integrated, the light guide part (the second light guide part 20 in the present embodiment) in which the emission surface is located at the rear of the light guide part (the light guide part 20 in the present embodiment) is located in the front. Light tends to leak into the first light guide portion 10) in this embodiment (that is, light leaks easily). Making the connection part 3 smaller means narrowing the path of light between the first light guide part 10 and the second light guide part 20. Therefore, light leakage can be suppressed by making the connecting portion 3 small. Here, “small connection portion 3” means that the first light guide portion 10 and the second light guide portion 20 overlap when viewed from the left-right direction (ie, viewed from the X-axis direction). This means that the cross-sectional area of the connecting portion 3 formed at a certain position is small.

  In addition, the incident portion 21 of the second light guide 20 is located behind the reflecting surface 12 of the first light guide 10 in the emission direction. Therefore, when the plurality of second light source units 27 are mounted on the second light source unit 27 located behind the second light guide unit 20, the circuit board 29 is arranged in a series along the left-right direction. can do. Thereby, the number of parts can be reduced and the cheap lamp 1 can be comprised.

  According to the lamp 1 of the present embodiment, the first and second emission surfaces 13 and 23 extending in the vertical direction (first direction) and the horizontal direction (second direction), respectively, can emit light. Various light emission patterns can be configured by turning on and off each light source. In addition, two types of lamps with different light emission patterns may be provided depending on whether only the first LED light source 18 is mounted or only the second LED light source 28 is mounted. In this case, since the same light guide 2 can be used, an inexpensive lamp can be provided by sharing parts.

<Modification>
FIG. 4 shows a second light guide 20A of Modification 1 and a second light guide 20B of Modification 2 that can be employed in the lamp 1 of the first embodiment. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
The positions of the second light guide portions 20A and 20B of the first and second modified examples are different from those of the second light guide portion 20 of the first embodiment. The second light guides 20A and 20B are connected to the first light guide 10 at the connection parts 3A and 3B, respectively. The second light guides 20 </ b> A and 20 </ b> B of Modifications 1 and 2 are arranged along the reflective surface 12 of the first light guide 10. The upper surface of the second light guide unit 20 </ b> A according to Modification 1 is substantially coincident with the upper surface of the first light guide unit 10. The second light exit surface 23 </ b> B of the second light guide unit 20 </ b> B of Modification 2 substantially matches the first light output surface 13 of the first light guide unit 10.

In the second light guide sections 20A and 20B of the first and second modifications, the connection sections 3A and 3B with the first light guide section 10 are arranged along the reflective surface 12 of the first light guide section 10. Yes.
Similarly to the second light guide 20 of the first embodiment, the incident portions 21A and 21B of the second light guides 20A and 20B of the first and second modifications are the reflection surface 12 of the first light guide 10. On the other hand, it is located behind the emission direction. Thereby, connection part 3A, 3B can be made small, the path of the light between 2nd light guide part 20A, 20B and the 1st light guide part 10 can be narrowed, and a leak light can be suppressed.

Second Embodiment
FIG. 5 is a front view of the lamp 101 according to the second embodiment.
The lamp 101 of the second embodiment is different from the first embodiment in the configuration of the second light guide unit 120 in the vicinity of the connection unit 103. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The lamp 101 according to the second embodiment irradiates light emitted from the first light source unit 17, the second light source unit 27, and the first and second light source units 17 and 27 forward (+ Y direction). A light guide 102.

  The light guide 102 is configured by integrally connecting four first light guides 110 and three second light guides 120. The first light guide unit 110 has a plate shape extending in the vertical direction. The second light guide 120 has a plate shape extending in the left-right direction (second direction). The 1st and 2nd light guide parts 110 and 120 have an entrance part, a reflective surface, and an output surface similarly to 1st Embodiment. The first light guide unit 110 and the second light guide unit 120 are arranged in order in the horizontal direction. A connection part 103 is formed at the boundary between the first light guide part 110 and the second light guide part 120.

  On both upper and lower surfaces of the second light guide unit 120, inclined surfaces are provided at both ends in the left-right direction and are inclined in a direction in which the plate thickness decreases. That is, the second light guide part 120 is provided with a thin part 125 where the plate thickness is partially reduced at the connection part 103 with the first light guide part 110.

In the lamp 101 according to the present embodiment, the connection portion 103 can be made smaller because the thickness of the second light guide 120 is partially reduced in the connection portion 103. Thereby, the path of the light between the 1st light guide part 110 and the 2nd light guide part 120 can be narrowed, and leak light can be suppressed.
In addition, this embodiment illustrated the case where the plate | board thickness of the 2nd light guide part 120 became thin in the connection part 103. FIG. Even if the plate thickness of the first light guide unit 110 is thin in the connection unit 103, a certain effect of suppressing leakage light can be obtained.

<Third Embodiment>
FIG. 6 is a front view of a lamp 201 according to the third embodiment. 7 is a cross-sectional view taken along line VII-VII in FIG.
The lamp 201 of the third embodiment is mainly different from the first embodiment in the direction of the incident part 221 of the second light guide part 220.

  The light source unit 217 includes a circuit board (board) 219, four first LED light sources 218 mounted on the circuit board 219, and three second LED light sources 228 mounted on the circuit board 219. Have. The circuit board 219 is disposed in parallel with the horizontal plane. The four first LED light sources 218 and the second LED light sources 228 are linearly arranged in the left-right direction (X-axis direction) of the lamp 201. As shown in FIG. 7, the second LED light source 228 is arranged rearward with respect to the first LED light source 218.

  The light guide 202 is configured by integrally connecting four first light guides 210 and three second light guides 220. The first light guide unit 210 has a plate shape extending in the vertical direction. The second light guide unit 220 has a plate shape extending in the left-right direction (second direction). The first light guide unit 210 and the second light guide unit 220 are arranged in order in the horizontal direction. A connection part 203 is formed at the boundary between the first light guide part 210 and the second light guide part 220.

  The first light guide unit 210 has substantially the same configuration as the first light guide unit 10 of the first embodiment, and includes an incident unit 211, a reflective surface 212, and a first output surface (first output unit) 213. Have The 1st light guide part 210 irradiates the light radiate | emitted from the 1st LED light source 218 toward the front.

  A lens body 211 a is formed on the incident portion 211 of the first light guide portion 210. The lens body 211a has a uniform shape along the front-rear direction. The lens body 211a converts the light incident from the first LED light source 218 into light parallel to the vertical plane (that is, the YZ plane) along the front-rear direction.

  The 2nd light guide part 220 irradiates the light radiate | emitted from the 2nd LED light source 228 toward the front. As illustrated in FIG. 7, the second light guide unit 220 includes an incident unit 221, a primary reflection surface 224, a secondary reflection surface 222, and a second emission surface (second emission unit) 223. The incident portion 221 and the secondary reflection surface 222 are formed in the second light guide portion 220 as part of the outer peripheral surface of the plate-like portion 220a extending in the left-right direction (second direction). The primary reflection surface 224 is located at the rear portion of the plate-like portion 222a, and the incident portion 221 is formed so as to protrude upward from the primary reflection surface 224.

  The incident part 221 of the second light guide part 220 faces the second LED light source 228. The light emitted from the second LED light source 228 enters the second light guide unit 220 from the incident unit 221. The incident portion 221 is formed with a lens body 221a. The lens body 221a forms a uniform shape along the left-right direction. The lens body 221a converts the light incident from the second LED light source 228 into light parallel to the vertical plane (that is, the XZ plane) along the left-right direction.

  The primary reflection surface 224 of the second light guide unit 220 is a flat surface that is inclined to face the rear and the lower side. The primary reflection surface 224 refracts the light incident from the incident portion 221 and directs it forward. The light reflected by the primary reflection surface 224 becomes light parallel to the horizontal plane (that is, the XY plane).

  The secondary reflection surface 222 of the second light guide 220 has substantially the same configuration as the reflection surface 22 in the second light guide 20 of the first embodiment. That is, the 2nd light guide part 220 radiate | emits the reflected light which has a parabolic shape seeing from the up-down direction as parallel light ahead.

  The second emission surface 223 is located behind the first emission surface 213 in the emission direction. Further, the incident part 221 of the second light guide part 220 is located behind the reflection surface 212 of the first light guide part 210 in the emission direction. Therefore, the lamp 201 of the present embodiment reduces the connection portion 203 by the same action as that of the first embodiment, and leaks light between the first light guide portion 210 and the second light guide portion 220. Can be suppressed.

  According to the lamp 201 of the present embodiment, the incident portions 211 and 221 of the first and second light guide portions 210 and 220 are directed in the same direction. Accordingly, the first and second LED light sources 218 and 228 can be mounted on the same circuit board, and the inexpensive lamp 201 can be provided by reducing the number of components.

As described above, various embodiments of the present invention and modifications thereof have been described. However, each configuration in each of the embodiments and modifications, combinations thereof, and the like are examples, and the scope of the present invention is not deviated from. Configuration additions, omissions, substitutions, and other changes are possible. Further, the present invention is not limited by the embodiment.
For example, the first and second emission surfaces (first and second emission portions) of the above-described embodiment are flat surfaces, but may be curved surfaces such as a paraboloid, and a prism is provided on the surface. It may be formed.

  DESCRIPTION OF SYMBOLS 1,101,201 ... Lamp, 2,102,202 ... Light guide, 3,3A, 3B, 103,203 ... Connection part 10,110,210 ... First light guide part 20,20A, 20B, 120, 220 ... second light guide part, 11, 21, 21A, 21B, 211, 221 ... incident part, 12, 22, 212, 222, 224 ... reflection surface, 13, 213 ... first emission surface (first 1 emission portion), 23, 223... Second emission surface (second emission portion), 19, 29, 219... Circuit board (substrate)

Claims (4)

A light guide body in which a plate-like first light guide portion and a plate-like second light guide portion are integrally connected;
A first light source that causes light to enter the first light guide;
A second light source for making light incident on the second light guide,
The first light guide unit includes a reflection surface that internally reflects incident light, and a first emission unit that emits light reflected from the reflection surface and extending in a first direction.
The second light guide has a second light emitting part extending in a second direction intersecting the first direction,
The first and second emission units emit light in a common emission direction,
The lamp | ramp with which the incident part of a said 2nd light guide part is located in the output direction back with respect to the reflective surface of a said 1st light guide part. With respect to the first emission part, the second emission part is located rearward in the emission direction.
The lamp according to claim 1. The first and second light sources are mounted on the same substrate;
The incident portions of the first and second light guide portions face the same direction,
The lamp according to claim 1 or 2. Either one or both of the first and second light guide parts have a partially reduced plate thickness at each connection part,
The lamp as described in any one of Claims 1-2.

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