JP2015159063A - Lamp fitting - Google Patents

Lamp fitting Download PDF

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Publication number
JP2015159063A
JP2015159063A JP2014033818A JP2014033818A JP2015159063A JP 2015159063 A JP2015159063 A JP 2015159063A JP 2014033818 A JP2014033818 A JP 2014033818A JP 2014033818 A JP2014033818 A JP 2014033818A JP 2015159063 A JP2015159063 A JP 2015159063A
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JP
Japan
Prior art keywords
light
surface
light guide
forward
incident
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2014033818A
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Japanese (ja)
Inventor
祐太 高橋
Yuta Takahashi
祐太 高橋
Original Assignee
スタンレー電気株式会社
Stanley Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by スタンレー電気株式会社, Stanley Electric Co Ltd filed Critical スタンレー電気株式会社
Priority to JP2014033818A priority Critical patent/JP2015159063A/en
Publication of JP2015159063A publication Critical patent/JP2015159063A/en
Application status is Pending legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235Light guides
    • F21S43/236Light guides characterised by the shape of the light guide
    • F21S43/237Light guides characterised by the shape of the light guide rod-shaped
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235Light guides
    • F21S43/242Light guides characterised by the emission area
    • F21S43/245Light guides characterised by the emission area emitting light from one or more of its major surfaces

Abstract

Leakage light from a side surface of a light guide is effectively used. A lamp 1 includes an LED 4, a light guide 5 having a right end surface on which light from the LED 4 is incident, and a front surface on which light incident from the right end surface is emitted forward. And a reflecting surface 72a of the reflector 7 that is disposed below and reflects light emitted from the lower surface of the light guide 5 forward. [Selection] Figure 2

Description

  The present invention relates to a lamp that emits light from a light guide.

  2. Description of the Related Art Conventionally, various lamps for vehicles, for example, are known that cause a light guide to emit light by light from a light source. As the light guide, a light guide rod formed in a long rod shape (for example, see Patent Documents 1 and 2) and a light guide plate formed in a plate shape (for example, see Patent Document 3) are widely used. Yes.

  Such a light guide generally has a rear surface on which a lens cut for reflecting internal light is formed, and the light incident from the end surface is guided by the rear lens cut and emitted from the front surface. By doing so, the front surface is configured to emit light.

JP 2010-272469 A JP 2013-179092 A JP 2013-168268 A

  By the way, in the light guide, the light that guides the inside cannot be completely controlled, and therefore, leaked light that escapes from the side surface of the light emitting surface, not from the front surface, is inevitably emitted. Since such leaked light tends to be miscellaneous light that is not irradiated in a desired optical path, a technique that can effectively use the leaked light has been desired.

  SUMMARY An advantage of some aspects of the invention is that it provides a lamp that can effectively use light leaked from a side surface of a light guide.

In order to achieve the above object, the invention described in claim 1
A light source;
A light guide having an incident surface on which light from the light source is incident, and a front surface that emits light incident from the incident surface forward;
A lamp comprising:
A reflective surface is provided on a side of the light guide and reflects light emitted from the side surface of the light guide forward.

The invention according to claim 2 is the lamp according to claim 1,
The reflective surface is adjacent to the side of the light guide in a front view.

The invention according to claim 3 is the lamp according to claim 1 or 2,
The reflection surface is an inclined surface inclined obliquely forward at a predetermined angle toward the side.

According to the present invention, the light emitted from the side surface of the light guide is reflected forward by the reflection surface disposed on the side of the light guide. Therefore, the leakage light that has escaped from the side surface of the light guide can be effectively used as the forward irradiation light.

It is a front view of the lamp in embodiment. It is sectional drawing in the II-II line of FIG. It is a figure for demonstrating the reflection aspect of the leak light from the light guide by a reflective surface.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a lamp 1 in the present embodiment, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.
In the following description, “front”, “rear”, “left”, “right”, “upper”, and “lower” refer to the direction viewed from the lamp 1 unless otherwise specified.

  As shown in FIGS. 1 and 2, the lamp 1 includes a housing 2 whose front surface is open and a transparent outer lens 3 that covers the front opening of the housing 2. Inside the lamp chamber defined by the housing 2 and the outer lens 3, there are six LEDs (light emitting diodes) 4, three light guides 5, an inner lens 6, and a reflector 7. Is housed.

  Among these, the six LEDs 4,... Are juxtaposed along the vertical direction at the right end in the lamp chamber, and are mounted on the common substrate 41 with the light emitting surfaces facing leftward. More specifically, the six LEDs 4,... Are grouped every two to form three sets, and are arranged in groups.

  Each of the three light guides 5 is formed in a shape that is elongated in the left-right direction, and is arranged in parallel along the vertical direction while being arranged slightly forward as the lower one. Each light guide 5 is formed in a shape in which two hook-shaped portions 50, 50 that are formed in a forward convex shape and are elongated in the left-right direction are connected in the vertical direction. These three light guides 5,... Correspond to three sets of LEDs 4, and each of the bowl-shaped portions 50 corresponds to each LED 4.

The right end surface of each light guide 5 is opposed to the corresponding set of LEDs 4, 4, and serves as an incident surface on which light emitted from this set of LEDs 4, 4 enters the light guide 5. . Specifically, of the entire right end surface of each light guide 5, the right end surface portion of each bowl-shaped portion 50 faces the LED 4 corresponding to the bowl-shaped portion 50.
The rear surface of each light guide 5 is a reflection surface that internally reflects light incident on the light guide 5 from the right end surface, and has a plurality of lens cuts (not shown). . Each of the plurality of lens cuts is formed to be long in the vertical direction, and is arranged in parallel along the left-right direction over substantially the entire surface of the rear surface of the light guide 5 except for the upper and lower ends.

  With such a configuration, each light guide 5 emits light by light from the corresponding pair of LEDs 4 and 4. Specifically, light emitted leftward from each pair of LEDs 4 and 4 enters the light guide 5 from the right end surface of the corresponding light guide 5 and is internally reflected by the lens cut on the rear surface. By emitting light forward from the front surface, the front surface of the light guide 5 emits light. At this time, a plurality of lens cuts are formed on the rear surface of each light guide 5 over substantially the entire surface including the connecting portion between the two flange-shaped portions 50, 50. Emits light suitably over substantially the entire surface including the connecting portion between the two flange-shaped portions 50 and 50. In each light guide 5, the front surfaces of the two bowl-shaped portions 50, 50 are curved in a convex shape, so that the internal light is likely to be totally reflected on the front surface (incident angle is likely to be greater than the critical angle). ), The light is preferably guided to a position farther leftward from the right end surface on which the light is incident. Therefore, the front surface of each light guide 5 suitably emits light to a position farther from the right end surface.

  The inner lens 6 is disposed so as to widely cover the front of the three light guides 5. Specifically, the inner lens 6 is provided at the front and upper and lower ends between the three light-transmitting portions 61,... Positioned in front of the three light guides 5,. A plurality of black opaque portions 62,... Among these, the three translucent portions 61,... Have lens cuts (for example, fish-eye cuts) for diffusing the transmitted light on their respective surfaces, and light emitted from the three light guides 5,. Is diffused by the lens cut and transmitted forward.

  The reflector 7 is formed in a bent plate shape and is disposed so as to surround the rear of the three light guides 5. The reflector 7 has an aluminum film deposited on the front surface, and reflects light in the lamp chamber such as leakage light from the three light guides 5,.

  The portion of the reflector 7 excluding the upper and lower ends is formed in a stepped shape that is positioned stepwise forward as it goes downward, following the arrangement of the three light guides 5,. .. Have three step surface portions 71,... Located behind the light guides 5,... And two step portions 72, 72 located between the two adjacent light guides 5, 5.

  Of these, the front surfaces of the two stepped portions 72 and 72 are reflecting surfaces 72a that reflect light emitted from the lower surface of the light guide 5 as shown in FIG. The reflecting surface 72a is disposed below the light guide 5 located immediately above the light guide 5 and adjacent to the light guide 5 immediately below the light guide 5 with a predetermined gap. It is an inclined surface inclined forward and downward at an angle. With such a configuration, the reflection surface 72a can effectively utilize the leakage light that has escaped from the lower side surface of the light guide 5 located immediately above the reflection surface 72a. At this time, since the reflection surface 72a is adjacent to the light guide 5 below the light guide 5 in a front view, the reflected light from the reflection surface 72a is irradiated light from the light guide 5. It can irradiate integrally like.

  In addition, as shown in FIG.3 (b), the reflective surface 72a is spaced apart from the light guide 5 located in the immediate upper side, and the part adjacent to the downward direction of the said light guide 5 in front view However, when it is a plane orthogonal to the front-rear direction (front surface of the stepped surface portion 71), the leaked light from the lower surface of the light guide 5 cannot be effectively used. More specifically, in this case, although the reflection surface 72a can be expected to reflect the leakage light from the lower surface of the light guide 5 forward and effectively use it in some form, the light guide 5 in the front view. The front surface of the stepped surface portion 71 adjacent to the lower side of the light cannot reflect the leakage light from the lower surface of the light guide 5 forward. Therefore, a portion adjacent to the lower side of the light guide 5 in a front view becomes a dark portion that emits light darker than the light guide 5.

  As described above, according to the lamp 1 of the present embodiment, the light emitted from the lower side surface of the light guide 5 is moved forward by the reflection surface 72a of the reflector 7 disposed on the side of the light guide 5. Reflected. Therefore, the leaked light that has escaped from the lower surface of the light guide 5 can be effectively used as the forward irradiation light.

  In addition, since the reflecting surface 72a of the reflector 7 is adjacent to the lower side of the light guide 5 just above in the front view, the reflected light from the reflecting surface 72a is as if it were irradiated from the light guide 5. It is possible to irradiate integrally as if there is.

  The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

For example, in the above embodiment, the reflecting surface 72a of the reflector 7 is disposed below the light guide 5. However, the reflecting surface 72a is located on the side of the light guide having the front surface as the light emitting surface. What is necessary is just to be provided.
Further, the reflecting surface 72a may not be a flat inclined surface as long as the light emitted from the side surface of the light guide 5 can be reflected forward, and may be a curved surface, for example.

1 lamp 4 LED (light source)
DESCRIPTION OF SYMBOLS 5 Light guide 6 Inner lens 61 Translucent part 62 Non-transmissive part 7 Reflector 71 Step surface part 72 Step part 72a Reflective surface

Claims (3)

  1. A light source;
    A light guide having an incident surface on which light from the light source is incident, and a front surface that emits light incident from the incident surface forward;
    A lamp comprising:
    A lamp having a reflecting surface disposed on a side of the light guide and reflecting light emitted from a side surface of the light guide forward.
  2.   The lamp according to claim 1, wherein the reflecting surface is adjacent to a side of the light guide in a front view.
  3.   The lamp according to claim 1 or 2, wherein the reflecting surface is an inclined surface inclined obliquely forward at a predetermined angle toward the side.
JP2014033818A 2014-02-25 2014-02-25 Lamp fitting Pending JP2015159063A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014033818A JP2015159063A (en) 2014-02-25 2014-02-25 Lamp fitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014033818A JP2015159063A (en) 2014-02-25 2014-02-25 Lamp fitting

Publications (1)

Publication Number Publication Date
JP2015159063A true JP2015159063A (en) 2015-09-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014033818A Pending JP2015159063A (en) 2014-02-25 2014-02-25 Lamp fitting

Country Status (1)

Country Link
JP (1) JP2015159063A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106382586A (en) * 2016-08-29 2017-02-08 重庆长安汽车股份有限公司 Light guide light-leakage preventing structure for car lamp
JP2018525893A (en) * 2015-07-09 2018-09-06 クゥアルコム・インコーポレイテッドQualcomm Incorporated Low latency physical uplink control channel using scheduling request and channel state information

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018525893A (en) * 2015-07-09 2018-09-06 クゥアルコム・インコーポレイテッドQualcomm Incorporated Low latency physical uplink control channel using scheduling request and channel state information
CN106382586A (en) * 2016-08-29 2017-02-08 重庆长安汽车股份有限公司 Light guide light-leakage preventing structure for car lamp
CN106382586B (en) * 2016-08-29 2019-10-08 重庆长安汽车股份有限公司 A kind of anti-light guide light leakage structure of car light

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