WO2017046945A1 - Light source device, and illumination fixture and vehicle lamp using same - Google Patents

Light source device, and illumination fixture and vehicle lamp using same Download PDF

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Publication number
WO2017046945A1
WO2017046945A1 PCT/JP2015/076689 JP2015076689W WO2017046945A1 WO 2017046945 A1 WO2017046945 A1 WO 2017046945A1 JP 2015076689 W JP2015076689 W JP 2015076689W WO 2017046945 A1 WO2017046945 A1 WO 2017046945A1
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Prior art keywords
light source
texture
light
source device
pitch
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PCT/JP2015/076689
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French (fr)
Japanese (ja)
Inventor
杉山 寿紀
啓之 梶川
長平 小野
智貴 山本
平田 浩二
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日立マクセル株式会社
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Priority to JP2017540435A priority Critical patent/JP6515187B2/en
Priority to PCT/JP2015/076689 priority patent/WO2017046945A1/en
Publication of WO2017046945A1 publication Critical patent/WO2017046945A1/en

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    • 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
    • F21S43/239Light guides characterised by the shape of the light guide plate-shaped
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • 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
    • 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
    • F21S43/247Light guides with a single light source being coupled into the light guide
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/18Edge-illuminated signs

Definitions

  • the present invention relates to a light source device that can be used as a linear or planar light source.
  • a light source device that can be suitably used as a lighting fixture to be attached to a wall surface or a vehicle lamp in a moving body such as an automobile
  • light from a solid light source is incident on a light guide made of a transparent member, and the light is incident
  • a configuration in which light is extracted from the light guide by scattering by the uneven shape formed on the surface of the light guide is already known.
  • the uneven shape formed on the light guide is made into a fine pattern so that the bright and dark patterns caused by the individual patterns are not visible, and the appearance and appearance of the light source device are visible. Techniques for improving the above are disclosed.
  • the appearance of the light source device on the limited evaluation criteria is improved by adopting a configuration in which the bright and dark patterns caused by the individual fine patterns are not visible, the light emission distribution is uniform and planar, and static It becomes a thing. Therefore, especially when considering use as a brake light or information indicator for vehicles, its visibility and ability to prompt attention (hereinafter referred to as “attention”) are poor, and sufficient performance is not necessarily required. Can not be said to be able to demonstrate.
  • the present invention has been achieved in view of the above-described problems in the prior art, and the object thereof is a light source that has high visibility and alertness, can be manufactured at low cost, and has a high-class feeling.
  • Another object of the present invention is to provide a lighting apparatus and a vehicular lamp using the apparatus.
  • a light source device including a light source and a light guide that propagates light from the light source and emits the light to the outside.
  • the light guide has at least a first surface that emits light and a second surface that is substantially parallel to the first surface and faces the first surface, and the first surface and the second surface.
  • a light source device that has high visibility and alertness, can be manufactured at low cost, and has a high-class feeling, and further a lighting fixture and a vehicle lamp using the light source device. The excellent effect that it becomes possible is exhibited.
  • FIG. 5 is a diagram showing cross-sectional shapes of the second texture 16 and the third texture 17.
  • FIG. 5 is a partially enlarged cross-sectional view of a light guide showing the appropriate inclination angle by the second texture and the third texture. It is a figure which shows the example of generation
  • FIG. 1 is a perspective view showing a light guide 11 that is a main member of a light source device according to an embodiment (Example 1) of the present invention.
  • FIG. 1 The perspective view which looked at the light body 11 from the surface, and FIG.1 (B) each show the perspective view which looked at the said light guide 11 from the back surface.
  • the light guide 11 has a light emitting portion 13 that is formed into a rectangular plate shape as a whole by a light-transmitting resin member such as PMMA, for example. At both ends in the longitudinal direction, substantially triangular light introducing portions 14a and 14b are formed, and light receiving portions (surfaces) 12a and 12b are formed at the tip portions.
  • the light emitting unit 13 includes a light emission surface (upper side surface) 13a and a facing surface (lower side surface) 13b that is substantially parallel to the light emitting surface 13a.
  • a texture 15 to be described in detail below is formed on the emission surface (upper side surface) 13a of the light emitting section 13 (see FIG.
  • FIG. 2 shows a perspective view of the light source device 10 in a state where the light guide 11 described above is housed in a case and attached to a lid member.
  • FIG. 2 shows the light source device 10 in a state of being housed in a case 21 formed of metal or resin
  • FIG. 2B further shows the lid member 22 formed of, for example, metal or resin.
  • Each of the light source devices 10 in a state where is attached is shown.
  • symbols 23a and 23b in a figure are not limited to it, the solid light source which consists of solid light emitting elements containing a semiconductor laser etc. is shown, for example, and the code
  • the light generated from the solid light sources 23a and 23b efficiently passes through the light introducing portions 14a and 14b. Then, the light is emitted from the light emitting unit 13 toward the outside (upward direction in FIG. 2).
  • the solid light sources 23 a and 23 b are mounted on the substrates 24 a and 24 b, respectively, and are housed in the case 21 together with the light guide 11. Further, the case 21 and the lid member 22 are connected by screws (not shown), so that the light guide 11 is fixed to the substrates 24a and 24b on which the solid light sources are mounted.
  • FIG. 3 shows the shape of the above-described (first) texture 15.
  • FIG. 3A shows the overall shape of the texture 15 formed on the light emitting side of the light emitting unit 13
  • FIG. 3 (B) shows the cross-sectional shape of the texture 15.
  • the texture 15 formed on the emission surface (upper side surface) 13a side of the light emitting portion 13 is a shape bent at the central portion (in this example, the central portion protrudes toward the right side of the drawing as is apparent from these drawings.
  • Each texture 15 has a relative angle with respect to a texture 16 described later (that is, a texture 16 formed on the opposite surface (lower side surface) 13b), and ⁇ 0 is about 5 degrees. It is set to become.
  • the moiré fringes generated by the above-described configuration appear to move from the center to the left and right with changes in the relative distance and angle from the viewpoint of the observer who sees it. It can be. That is, according to the light source device 10 described above, the entire display in the related art is compared with a static display, and a display including a dynamic display in part, in other words, a character is displayed on the background of a dynamic moire stripe. By floating and displaying, it is possible to realize the light source device 10 that is excellent in visibility and alertness.
  • the relative angle ⁇ 0 described above is appropriately determined depending on the shape of the generated moire fringes.
  • the range of ⁇ 0 is preferably in the range of approximately 2 degrees to 10 degrees.
  • the texture 15 is constituted by a groove having a concave cross section, and the pitch P1 is set to about 1 mm.
  • the value of this pitch can be set as appropriate.
  • the pitch P1 is set to a value smaller than 0.1 mm, the processing accuracy becomes strict and the processing time becomes long, which is not preferable.
  • the value is too large, the visibility of each groove is improved (improves), and the texture 15 disturbs the visibility of moire fringes caused by interference with the texture 16 described later. After all, it is not preferable. Therefore, it is preferable to select a pitch at which the apparent angle at which the visibility is reduced is 1 minute (1/60 degrees) or less in the distance between the target person and the light source device assumed according to the purpose of use. .
  • the distance between the vehicles during normal travel needs to be at least about 10 m.
  • the distance between the vehicles during normal travel needs to be at least about 10 m.
  • the pitch P1 of the texture 15 is set to 0.6 mm or less. By doing so, the angle of 1 minute or less, which is the above condition, can be satisfied.
  • the distance between the subject and the light source device is approximately 5 m or more, and the pitch P1 of the texture 15 is 1.5 mm or less.
  • the angle of 1 minute or less which is the above condition, can be satisfied.
  • the depth D1 of the texture 16 is shallow at the end portion in the vicinity of the light introducing portions 14a and 14b and deeper toward the central portion from the viewpoint of uniformity of luminance distribution on the light emitting portion surface 13a of the light emitting portion 13. It is preferable to set so that In this example, it is set to 0.08 mm in the vicinity of the light introducing portions 14 a and 14 b and 0.12 mm in the central portion.
  • FIG. 4 shows the shapes of the texture 16 and the texture 17 formed on the light emitting portion back surface 13b.
  • FIG. 4 (A) shows a perspective view
  • FIG. The cross section and the cross section of the texture 17 are shown in FIG.
  • the texture 16 has a shape protruding along the longitudinal direction of the light emitting portion back surface 13b
  • the texture 17 has a shape protruding along the longitudinal direction.
  • the pitch P2 of the texture 16 is determined according to the following equation from the relationship with the period P0 of the moire fringes that are desired to be generated by the interference with the texture 15 having the pitch P1.
  • mP1 P0 (Formula 1)
  • m is an integer
  • P2 (m / (m + 1)) P1 (Formula 2)
  • P2 (m / (m ⁇ 1)) P1 (Formula 3)
  • the pitch P2 of the texture 16 formed on the light introducing portion 14a side is 0.962 mm with the center of the light emitting portion back surface 13b of the light guide 11 as the boundary, and on the other hand, the light introducing portion 14b side is formed.
  • the pitch is 1.042 mm
  • the above-described texture 15 is bent at the central portion as shown in FIG.
  • the bending direction of the moire stripes 19 generated by the interference between the texture 15 and the texture 16 can be changed (reversed) with the center as a boundary. In this case, since the process of forming the texture 15 is simplified, more inexpensive production is possible.
  • the change in the relative angle between the light source device 10 and the observer described above not only improves the recognizability by moving the moire fringe pattern, but also moves the moire fringe pattern from the center. Since it is reversed, it becomes possible to make the moiré fringe pattern appear from the central portion or disappear at the central portion, thereby providing a light-emitting body with higher added value.
  • the depth of the texture 16 is set so that it is shallow at the end near the light introducing portions 14a and 14b and deeper toward the center from the viewpoint of uniformity in the luminance distribution of the light emitting portion surface 13a. It is preferable to do. Here, it was set to 0.1 mm in the vicinity of the light introducing portions 14a and 14b, and 0.38 mm in the central portion.
  • the light source device even when the light source, for example, the solid light source is turned off, it is preferable to ensure the visibility to some extent, and more specifically, the external light is applied to some extent. It is preferably reflective.
  • FIGS. 6A and 6B show optical lines when external light is reflected by the texture 17 having an inclination angle of 45 degrees and an inclination angle of 45 degrees or more, respectively.
  • the inclination angles ⁇ 5a, ⁇ 5b, ⁇ 6a, and ⁇ 6b of the texture 17a or the texture 17b make the external light from the upper side in the horizontal direction efficient. Both are preferably larger than 45 degrees for reflection.
  • the pitch P3 (see FIG. 4C) of the texture 17a or the texture 17b is 2 mm
  • the height D3a or D3b is 0.85 mm.
  • a character or a pattern can be formed on a part of the light emitting portion back surface 13b of the light guide 11.
  • a part of the surface of the texture 16 and the texture 17 is formed into a shape obtained by removing it into a concave shape, whereby a character or pattern is formed on a part of the light emitting portion surface 13a.
  • a character or pattern is formed on a part of the light emitting portion surface 13a.
  • this structure is a suitable structure as an indicator lamp for alerting.
  • the convex shape is described as the cross-sectional shape of the texture 16 and the texture 17 formed on the opposite surface (lower side) 13b side, that is, the light emitting portion back surface 13b.
  • it may be a roof shape or a cylindrical shape, or may be a concave shape as shown in FIG.
  • the concave texture 26 and the texture 27 are formed on the light emitting portion back surface 13b.
  • the pitch P2 of the texture 26 and the pitch P3 of the texture 27 may be the same as the pitches of the texture 16 and the texture 17 shown in the first embodiment.
  • the angles ⁇ 3 and ⁇ 4 of the texture 26 may be the same as the angle of the texture 16.
  • the (third) texture 27a or the texture 27b on the light emitting portion back surface 13b in addition to the texture 26 described above. Function is given. 8A and 8B show optical lines when external light is reflected by the texture 27 having an inclination angle of 45 degrees and an inclination angle of 45 degrees or more, respectively.
  • the inclination angles ⁇ 5a, ⁇ 5b, ⁇ 6a, and ⁇ 6b of the texture 27a or the texture 27b can effectively make the external light from the upper side in the horizontal direction forward. Both are preferably larger than 45 degrees for reflection.
  • the pitch P3 (see FIG. 4C) of the texture 27a or the texture 27b is 2 mm, and the height D3a or D3b is 0.9 mm.
  • the solid light sources 23a and 23b are not necessarily limited to those that emit light continuously at the same time, and may be blinked or alternately turned on. Is also possible. In particular, by aligning the direction of the generated moire arrow and flashing in the same manner as the direction of the arrow, a lamp for a display plate capable of guiding a route with excellent recognizability, or a vehicle It is possible to provide a direction indicating lamp that is a lamp for use.
  • the illumination device with a video projection function according to various embodiments of the present invention has been described.
  • the present invention is not limited to the above-described embodiments, and includes various modifications.
  • the above-described embodiments are described in detail for the entire system in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described.
  • a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.
  • SYMBOLS 10 Light source device, 11 ... Light guide, 12a, 12b ... Light-receiving part (surface), 13 ... Light emission part, 13a, 13b ... (Upper side and lower side surface) (14a, 14b ... Light introduction part, 15, 16, 17 ... Texture, 21 ... Case, 22 ... Lid member, 23a, 23b ... Solid light source, 24a, 24b ... Substrate.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

The purpose of the present invention is to provide: a light source device that has high visibility and attention-evoking properties, can be manufactured at low cost, and has a high-quality image; and an illumination fixture and a vehicle lamp using such a light source device. A light source device 10 is provided with solid light sources 23a, 23b and a light guide 11 that emits light emitted by the solid light sources 23a, 23b to the outside. The light guide 11 comprises at least a first surface 13a that emits light and a second surface 13b that faces and is roughly parallel with the first surface, and a first texture 15 and second texture 16 that are cyclic with mutually different pitches are formed on the first surface 13a and the second surface 13b. Furthermore, a third texture 17 that is roughly perpendicular with the texture 16 is formed on the second surface. Moiré fringes 19 are produced in the light emitted by the first surface 13a of the light guide 11 due to interference between the concentration of the light produced by the first texture 15 and the concentration of the light produced by the second texture 16.

Description

光源装置及びそれを利用した照明器具と車両用灯具LIGHT SOURCE DEVICE AND LIGHTING EQUIPMENT USING THE SAME AND VEHICLE LIGHT
 本発明は、線状もしくは面状の光源として利用可能な光源装置に関する。 The present invention relates to a light source device that can be used as a linear or planar light source.
 例えば、壁面に取り付ける照明器具、更には、自動車等の移動体における車両用灯具として好適に利用可能な光源装置として、固体光源からの光を透明部材からなる導光体に入射させ、当該光を前記導光体の表面に形成した凹凸形状により散乱させることにより、当該導光体から光を取り出す構成は既に知られている。例えば、以下の特許文献1、2には、当該導光体に形成する凹凸形状を微細なパターンとすることにより、個々のパターンに起因する明暗模様を見えなくし、光源装置の見た目の質感や見栄えの向上を図るための技術が開示されている。 For example, as a light source device that can be suitably used as a lighting fixture to be attached to a wall surface or a vehicle lamp in a moving body such as an automobile, light from a solid light source is incident on a light guide made of a transparent member, and the light is incident A configuration in which light is extracted from the light guide by scattering by the uneven shape formed on the surface of the light guide is already known. For example, in Patent Documents 1 and 2 below, the uneven shape formed on the light guide is made into a fine pattern so that the bright and dark patterns caused by the individual patterns are not visible, and the appearance and appearance of the light source device are visible. Techniques for improving the above are disclosed.
特開2014-29819号公報JP 2014-29819 A 特開2013-143307号公報JP 2013-143307 A
 しかしながら、個々の微細パターンに起因する明暗模様が見えない構成にすることにより、限定した評価基準上での光源装置の見栄えは向上するが、これでは発光分布が均一で平面的であり、静的にものになってしまう。そのため、特に、車両用の制動灯や情報表示灯としての使用を考えた場合には、その視認性や注意喚起を促す能力(以下、「注意喚起性」と言う)に乏しく、必ずしも十分な性能を発揮し得るものとは言えなかった。 However, although the appearance of the light source device on the limited evaluation criteria is improved by adopting a configuration in which the bright and dark patterns caused by the individual fine patterns are not visible, the light emission distribution is uniform and planar, and static It becomes a thing. Therefore, especially when considering use as a brake light or information indicator for vehicles, its visibility and ability to prompt attention (hereinafter referred to as “attention”) are poor, and sufficient performance is not necessarily required. Could not be said to be able to demonstrate.
 特に、近年においては、従来製品との差別化を図るため、発光分布が均一で平面的であるよりも、むしろ、その視認性と共にその注意喚起性などに優れた発光特性を有する高級感のある照明器具や灯具が要求されてきている。 In particular, in recent years, in order to differentiate it from conventional products, rather than having a uniform and flat emission distribution, it has a high-class feeling that has excellent emission characteristics such as visibility and alertness. Lighting fixtures and lamps have been required.
 そこで、本発明は上述した従来技術における課題に鑑みて達成されたものであり、その目的は、視認性や注意喚起性が高く、低コストで製造が可能であり、かつ、高級感のある光源装置を、更には、それを利用した照明器具と車両用灯具を提供することにある。 Therefore, the present invention has been achieved in view of the above-described problems in the prior art, and the object thereof is a light source that has high visibility and alertness, can be manufactured at low cost, and has a high-class feeling. Another object of the present invention is to provide a lighting apparatus and a vehicular lamp using the apparatus.
 上記の目的を達成するための一実施の態様として、本発明によれば、光源と、当該光源からの光を内部で伝搬して外部に出射する導光体とを備えた光源装置であって、前記導光体は、少なくとも光を出射する第1の面と、当該第1の面に対向して略平行な第2の面を有し、前記第1の面及び前記第2の面には、少なくともそれぞれピッチの異なる周期状の第1のテクスチャーと第2のテクスチャーとがそれぞれ形成されており、前記第1のテクスチャーと前記第2のテクスチャーにより生じる光の濃淡の干渉により、動的な表示と静的な表示とを含む表示を発生させる。 As an embodiment for achieving the above object, according to the present invention, there is provided a light source device including a light source and a light guide that propagates light from the light source and emits the light to the outside. The light guide has at least a first surface that emits light and a second surface that is substantially parallel to the first surface and faces the first surface, and the first surface and the second surface. Are formed with a periodic first texture and a second texture each having a different pitch, and dynamic interference is caused by interference of light density caused by the first texture and the second texture. Generate a display that includes a display and a static display.
 本発明によれば、視認性や注意喚起性が高く、低コストで製造が可能であり、かつ、高級感のある光源装置を、更には、それを利用した照明器具と車両用灯具を提供することが可能となるという優れた効果を発揮する。 According to the present invention, there are provided a light source device that has high visibility and alertness, can be manufactured at low cost, and has a high-class feeling, and further a lighting fixture and a vehicle lamp using the light source device. The excellent effect that it becomes possible is exhibited.
本発明の実施例1に係る光源装置の主要部材である導光体の構造を示す斜視図である。It is a perspective view which shows the structure of the light guide which is a main member of the light source device which concerns on Example 1 of this invention. 上記実施例1に係る光源装置の全体構造を示す斜視図である。It is a perspective view which shows the whole light source device structure which concerns on the said Example 1. FIG. 上記実施例1における導光体の第1のテクスチャー15の形状を示す図である。It is a figure which shows the shape of the 1st texture 15 of the light guide in the said Example 1. FIG. 上記実施例1における導光体の第2のテクスチャー16及び第3のテクスチャー17の形状を示す図である。It is a figure which shows the shape of the 2nd texture 16 and the 3rd texture 17 of the light guide in the said Example 1. FIG. 上記テクスチャーに形成された文字の一例を示す図である。It is a figure which shows an example of the character formed in the said texture. 上記第2のテクスチャー16及び第3のテクスチャー17の断面形状を示す図である。FIG. 5 is a diagram showing cross-sectional shapes of the second texture 16 and the third texture 17. 本発明の実施例2における第2のテクスチャー26及び第3のテクスチャー27の構造を示す斜視図とその断面形状を示す図である。It is a perspective view which shows the structure of the 2nd texture 26 and the 3rd texture 27 in Example 2 of this invention, and a figure which shows the cross-sectional shape. 上記第2のテクスチャー26及び第3のテクスチャー27による傾斜角の適正を示す導光体の一部拡大断面図である。FIG. 5 is a partially enlarged cross-sectional view of a light guide showing the appropriate inclination angle by the second texture and the third texture. 第1のテクスチャーと第2のテクスチャーとの干渉によるモアレ縞の発生の例を示す図である。It is a figure which shows the example of generation | occurrence | production of the moire fringe by interference with a 1st texture and a 2nd texture.
 以下、本発明の実施の形態について、添付の図面を参照しながら詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
 (実施例1)
 図1は、本発明の一実施例(実施例1)に係る光源装置のうち、その主要部材である導光体11を示す斜視図であり、特に、図1(A)には、当該導光体11をその表面から見た斜視図を、そして、図1(B)には、当該導光体11をその裏面から見た斜視図をそれぞれ示している。
Example 1
FIG. 1 is a perspective view showing a light guide 11 that is a main member of a light source device according to an embodiment (Example 1) of the present invention. In particular, FIG. The perspective view which looked at the light body 11 from the surface, and FIG.1 (B) each show the perspective view which looked at the said light guide 11 from the back surface.
 これらの図からも明らかなように、導光体11は、例えばPMMA等の透光性の樹脂部材により、全体として長方形の板状の形状に成形された発光部13を有しており、その長手方向の両端には略三角形状の光導入部14a、14bが形成され、その先端部には受光部(面)12a、12bが形成されている。また、発光部13は、光の出射面(上側面)13aと、これに対向して略平行な対向面(下側面)13bとを備えている。この発光部13の出射面(上側面)13aには(図1(A)を参照)、以下に詳述するテクスチャー15が形成され、その対向面(下側面)13bにも(図1(B)を参照)、以下に詳述するテクスチャー16、17が、更には、光源装置により表示される文字18a~18dが形成されている。 As is clear from these drawings, the light guide 11 has a light emitting portion 13 that is formed into a rectangular plate shape as a whole by a light-transmitting resin member such as PMMA, for example. At both ends in the longitudinal direction, substantially triangular light introducing portions 14a and 14b are formed, and light receiving portions (surfaces) 12a and 12b are formed at the tip portions. The light emitting unit 13 includes a light emission surface (upper side surface) 13a and a facing surface (lower side surface) 13b that is substantially parallel to the light emitting surface 13a. A texture 15 to be described in detail below is formed on the emission surface (upper side surface) 13a of the light emitting section 13 (see FIG. 1A), and the opposite surface (lower side surface) 13b is also formed on the opposite surface (lower side surface) 13b (see FIG. 1B). )), Textures 16 and 17 described in detail below, and characters 18a to 18d displayed by the light source device are formed.
 図2は、上述した導光体11をケース内に収納して、蓋部材に取り付けた状態の光源装置10の斜視図を示しており、特に、図2(A)は、導光体11を、例えば、金属や樹脂で形成したケース21内に収納した状態の光源装置10を、そして、図2(B)は、更に、その上に、例えば、金属や樹脂で形成した上記の蓋部材22を取り付けた状態の光源装置10をそれぞれ示している。なお、図中の符号23a、23bは、それに限定されることはないが、例えば、半導体レーザ等を含む個体発光素子からなる固体光源を示しており、そして、符号24a、24bは、当該固体光源がそれぞれ搭載された基板を示している。 FIG. 2 shows a perspective view of the light source device 10 in a state where the light guide 11 described above is housed in a case and attached to a lid member. In particular, FIG. For example, the light source device 10 in a state of being housed in a case 21 formed of metal or resin, and FIG. 2B further shows the lid member 22 formed of, for example, metal or resin. Each of the light source devices 10 in a state where is attached is shown. In addition, although the code | symbols 23a and 23b in a figure are not limited to it, the solid light source which consists of solid light emitting elements containing a semiconductor laser etc. is shown, for example, and the code | symbols 24a and 24b are the said solid light source. Indicates the substrate on which each is mounted.
 上述した導光体11、及び、それを取り付けた光源装置10の構成によれば、固体光源23a、23bから発生された光は、光導入部14a、14bを経ることにより効率良く導光体11に伝搬され、その後、発光部13から外部(図2の上方向)に向かって出射されることとなる。固体光源23a、23bは、それぞれ、基板24a、24bに搭載され、そして、導光体11と共に、ケース21内に収納されている。更に、ケース21と蓋部材22とは、ネジ(図示せず)により連結されることにより、導光体11は、固体光源を搭載した基板24a、24bに対して固定する構造となっている。 According to the configuration of the light guide 11 described above and the light source device 10 to which the light guide 11 is attached, the light generated from the solid light sources 23a and 23b efficiently passes through the light introducing portions 14a and 14b. Then, the light is emitted from the light emitting unit 13 toward the outside (upward direction in FIG. 2). The solid light sources 23 a and 23 b are mounted on the substrates 24 a and 24 b, respectively, and are housed in the case 21 together with the light guide 11. Further, the case 21 and the lid member 22 are connected by screws (not shown), so that the light guide 11 is fixed to the substrates 24a and 24b on which the solid light sources are mounted.
 図3は、上述した(第1の)テクスチャー15の形状を示しており、特に、図3(A)は、発光部13の光出射側に形成されたテクスチャー15の全体形状を、そして、図3(B)は当該テクスチャー15の断面形状を示している。 FIG. 3 shows the shape of the above-described (first) texture 15. In particular, FIG. 3A shows the overall shape of the texture 15 formed on the light emitting side of the light emitting unit 13, and FIG. 3 (B) shows the cross-sectional shape of the texture 15.
 発光部13の出射面(上側面)13a側に形成されるテクスチャー15は、これらの図からも明らかなように、中央部で屈曲した形状(本例では、中央部が図の右側向かって突出するように傾斜した形状)を有しており、それぞれのテクスチャー15は、後述するテクスチャー16(即ち、対向面(下側面)13b側に形成されたテクスチャー16)に対する相対角度はθ0が約5度となるように設定されている。 The texture 15 formed on the emission surface (upper side surface) 13a side of the light emitting portion 13 is a shape bent at the central portion (in this example, the central portion protrudes toward the right side of the drawing as is apparent from these drawings. Each texture 15 has a relative angle with respect to a texture 16 described later (that is, a texture 16 formed on the opposite surface (lower side surface) 13b), and θ0 is about 5 degrees. It is set to become.
 このように、以下に詳述する対向面(下側面)13b側の(第2の)テクスチャー16に対する僅かなピッチ差を出射面(上側面)13a側の(第1の)テクスチャー15に設けることによれば、図9にも示す様に、光源装置10の中央から左右に向かって「<」字状、及び、「>」字状に屈曲したモアレ縞(模様)19を発生する構成を得ることが可能となる。なお、図9(A)では、表示面の略中央部に「STOP」の文字を表示した例(車両用灯具の例)、図9(B)及び(C)には、表示面の略中央部に「EXIT」や「DOOR」の文字を表示した例(公共施設等の屋内の案内用灯具の例)をそれぞれ示している。 Thus, a slight pitch difference with respect to the (second) texture 16 on the opposite surface (lower side) 13b side described in detail below is provided in the (first) texture 15 on the emission surface (upper side) 13a side. As shown also in FIG. 9, the structure which produces | generates the "<" character shape and the moire stripe (pattern) 19 bent in the shape of ">" from the center of the light source device 10 toward right and left is obtained. It becomes possible. In FIG. 9A, an example in which the characters “STOP” are displayed at the approximate center of the display surface (an example of a vehicle lamp), and FIGS. 9B and 9C show the approximate center of the display surface. Examples of the characters “EXIT” and “DOOR” displayed on the part (examples of indoor guidance lamps in public facilities, etc.) are shown.
 即ち、上述の構成により発生したモアレ縞は、これを見る観察者の視点との相対距離や角度の変化等に伴って中央から左右に向かって移動するように見えることから、動的な表示面とすることが出来る。即ち、上述した光源装置10によれば、従来の全体が静的な表示と比較し、その一部に動的な表示を含んだ表示、換言すれば、動的なモアレ縞の背景に文字が浮び上がって表示することによって、その視認性や注意喚起性にも優れた光源装置10を実現することが可能となる。 That is, the moiré fringes generated by the above-described configuration appear to move from the center to the left and right with changes in the relative distance and angle from the viewpoint of the observer who sees it. It can be. That is, according to the light source device 10 described above, the entire display in the related art is compared with a static display, and a display including a dynamic display in part, in other words, a character is displayed on the background of a dynamic moire stripe. By floating and displaying, it is possible to realize the light source device 10 that is excellent in visibility and alertness.
 なお、上述した相対角度θ0は、発生されるモアレ縞の形状により適宜に決定される。本実施例に示した矢印をイメージした屈曲したモアレ縞を形成するためには、θ0の範囲としては、概ね2度~10度の範囲が望ましい。 The relative angle θ0 described above is appropriately determined depending on the shape of the generated moire fringes. In order to form a bent moire fringe in the image of the arrow shown in this embodiment, the range of θ0 is preferably in the range of approximately 2 degrees to 10 degrees.
 また、本実施例では、上記テクスチャー15は、断面が凹状の溝により構成されており、そのピッチP1は略1mmに設定されている。なお、このピッチの値は適宜に設定することが可能である。しかしながら、このピッチP1を0.1mmより小さな値に設定した場合には、その加工精度が厳しくなり、かつ、加工時間が長くなるので好ましくない。またこれより大き過ぎる値にすると、溝の一本一本の視認性が向上して(良くなって)しまい、当該テクスチャー15が、後に説明するテクスチャー16との干渉によって生じるモアレ縞の視認の邪魔となってしまい、やはり、好ましくない。従って、その使用目的により想定される対象者と光源装置との間の距離において、視認性が低下する見かけの角度が1分(1/60度)以下になるようなピッチを選択することが好ましい。 In the present embodiment, the texture 15 is constituted by a groove having a concave cross section, and the pitch P1 is set to about 1 mm. Note that the value of this pitch can be set as appropriate. However, when the pitch P1 is set to a value smaller than 0.1 mm, the processing accuracy becomes strict and the processing time becomes long, which is not preferable. On the other hand, if the value is too large, the visibility of each groove is improved (improves), and the texture 15 disturbs the visibility of moire fringes caused by interference with the texture 16 described later. After all, it is not preferable. Therefore, it is preferable to select a pitch at which the apparent angle at which the visibility is reduced is 1 minute (1/60 degrees) or less in the distance between the target person and the light source device assumed according to the purpose of use. .
 一例として、制動灯又は制動補助灯などの車両用灯具としての用途を考えた場合、通常の走行時における車間距離は、最低でも10m程度が必要となることから、テクスチャー15のピッチP1を2.9mm以下(0.1mm~2.9mmの範囲)とすることによれば、前記条件である角度1分以下を満足することができる。 As an example, when considering the use as a vehicular lamp such as a brake light or a brake auxiliary light, the distance between the vehicles during normal travel needs to be at least about 10 m. By setting it to 9 mm or less (in the range of 0.1 mm to 2.9 mm), the above condition of an angle of 1 minute or less can be satisfied.
 また、車両用灯具の一種である方向指示灯などの用途を考えると、対歩行者を想定しても、対象者と車との間の距離は5m以上が想定されるので、テクスチャー15のピッチP1を1.5mm以下(0.1mm~1.5mmの範囲)とすることにより、前記条件である角度1分以下を満足することができる。 In addition, considering the use of a direction indicator lamp, which is a kind of vehicle lamp, even if it is assumed to be a pedestrian, the distance between the target person and the vehicle is assumed to be 5 m or more, so the pitch of the texture 15 By setting P1 to 1.5 mm or less (in the range of 0.1 mm to 1.5 mm), the above condition of an angle of 1 minute or less can be satisfied.
 更に、屋内での表示灯である照明器具を考えると、対象者と光源装置との間の距離は一般に2m以上であることが想定されることから、テクスチャー15のピッチP1を0.6mm以下にすることにより、前記条件である角度1分以下を満足することができる。 Furthermore, considering a lighting fixture that is an indicator lamp indoors, since the distance between the subject and the light source device is generally assumed to be 2 m or more, the pitch P1 of the texture 15 is set to 0.6 mm or less. By doing so, the angle of 1 minute or less, which is the above condition, can be satisfied.
 加えて、屋外での表示灯である照明器具を考えた場合には、対象者と光源装置との間の距離は概ね5m以上であることが想定され、テクスチャー15のピッチP1を1.5mm以下にすることにより、前記条件である角度1分以下を満足することができる。 In addition, when considering a lighting fixture that is an indicator lamp outdoors, it is assumed that the distance between the subject and the light source device is approximately 5 m or more, and the pitch P1 of the texture 15 is 1.5 mm or less. By satisfying this condition, the angle of 1 minute or less, which is the above condition, can be satisfied.
 続いて、導光体11の発光部13の対向面(下側面)13b側、即ち、発光部裏面13bに形成された(第2の)テクスチャー16を構成する溝の傾斜角θ1、θ2の値について述べる。即ち、前述したモアレ縞のコントラストを高くする条件、及び、導光体11の発光部13の出射面(上側面)13a側、即ち、発光部表面13aからの出射光の正面輝度を高くする条件で検討を行った結果、θ1,θ2共に、42±3度であることが好ましいことが分かった。 Subsequently, the values of the inclination angles θ1 and θ2 of the grooves constituting the (second) texture 16 formed on the facing surface (lower side) 13b side of the light emitting unit 13 of the light guide 11, that is, the light emitting unit back surface 13b. Is described. That is, the condition for increasing the contrast of the moiré fringes described above and the condition for increasing the front luminance of the light emitted from the light emission part 13 of the light guide 11 on the emission surface (upper side) 13a side, that is, the light emission part surface 13a. As a result, it was found that both θ1 and θ2 are preferably 42 ± 3 degrees.
 また、このテクスチャー16の深さD1は、発光部13の発光部表面13aの輝度分布均一性の観点から、光導入部14a,14bの近傍とたる端部においては浅く、中央部に向かって深くなるように設定することが好ましい。なお、本例では、光導入部14a,14b近傍では0.08mm、そして、中央部では0.12mmとなるように設定した。 In addition, the depth D1 of the texture 16 is shallow at the end portion in the vicinity of the light introducing portions 14a and 14b and deeper toward the central portion from the viewpoint of uniformity of luminance distribution on the light emitting portion surface 13a of the light emitting portion 13. It is preferable to set so that In this example, it is set to 0.08 mm in the vicinity of the light introducing portions 14 a and 14 b and 0.12 mm in the central portion.
 図4には、上記発光部裏面13bに形成するテクスチャー16及びテクスチャー17の形状が示されており、特に、図4(A)に斜視図を示すと共に、図4(B)にはテクスチャー16の断面、そして、図4(C)にはテクスチャー17の断面がそれぞれ示されている。なお、テクスチャー16は、発光部裏面13bの長手方向に対して直交方向に沿って、テクスチャー17は長手方向に沿って突起した形状となっている。 FIG. 4 shows the shapes of the texture 16 and the texture 17 formed on the light emitting portion back surface 13b. In particular, FIG. 4 (A) shows a perspective view, and FIG. The cross section and the cross section of the texture 17 are shown in FIG. The texture 16 has a shape protruding along the longitudinal direction of the light emitting portion back surface 13b, and the texture 17 has a shape protruding along the longitudinal direction.
 ここで、テクスチャー16のピッチP2は、ピッチP1であるテクスチャー15との干渉により発生させたいモアレ縞の周期P0との関係から、下式に従って決定される。 Here, the pitch P2 of the texture 16 is determined according to the following equation from the relationship with the period P0 of the moire fringes that are desired to be generated by the interference with the texture 15 having the pitch P1.
 mP1=P0          …(式1)
 ただし、mは整数
 P2=(m/(m+1))P1  …(式2)
 又は
 P2=(m/(m-1))P1  …(式3)
mP1 = P0 (Formula 1)
However, m is an integer P2 = (m / (m + 1)) P1 (Formula 2)
Or P2 = (m / (m−1)) P1 (Formula 3)
 モアレ縞の周期P0は、遠方においても十分認識できるサイズにする必要がある。例えば10m先の遠方において見かけの角度を5分(0.08度)程度以上にすれば、人間の目の分解能の5倍程度の大きさなので十分認識可能である。その大きさは15mmとなる。本実施例では、多少の余裕を見込んで、P0=25mmとした。ここで、P1=1mm、m=25として、P2の値を上記(式2)あるいは(式3)従って求めると、P2=1.042mmあるいはP2=0.962となる。 The period P0 of the moire fringes needs to be a size that can be sufficiently recognized even in a distant place. For example, if the apparent angle is set to about 5 minutes (0.08 degrees) or more at a distance of 10 m away, it is sufficiently recognizable because it is about five times the resolution of the human eye. Its size is 15 mm. In this embodiment, P0 = 25 mm with some allowance. Here, assuming that P1 = 1 mm and m = 25, the value of P2 is determined according to the above (Equation 2) or (Equation 3), and P2 = 1.042 mm or P2 = 0.962.
 なお、ここで、導光体11の発光部裏面13bの中央を境として、光導入部14aの側に形成したテクスチャー16のピッチP2を0.962mm、他方、光導入部14bの側に形成したピッチを1.042mmとすることによれば、上述したテクスチャー15を上記図3(A)に示すように中央部で屈曲した形状の屈曲方向を全面で同一にしても、上記図9にも示す様に、テクスチャー15とテクスチャー16と間の干渉により発生するモアレ縞19の屈曲方向を、中央を境として変える(逆転させる)ことができる。なお、この場合、テクスチャー15を成形する工程が簡単となることから、より安価な製造が可能となる。 Here, the pitch P2 of the texture 16 formed on the light introducing portion 14a side is 0.962 mm with the center of the light emitting portion back surface 13b of the light guide 11 as the boundary, and on the other hand, the light introducing portion 14b side is formed. By setting the pitch to 1.042 mm, the above-described texture 15 is bent at the central portion as shown in FIG. Similarly, the bending direction of the moire stripes 19 generated by the interference between the texture 15 and the texture 16 can be changed (reversed) with the center as a boundary. In this case, since the process of forming the texture 15 is simplified, more inexpensive production is possible.
 また、上述した光源装置10と観察者との相対角度が変わることにより、モアレ縞の模様が移動して認識性が向上するばかりでなく、モアレ縞の模様の移動方向が、中央部を境に反転するので、モアレ縞の模様が中央部から湧き出し、又は、中央部で消滅するように見せることが可能になり、これにより、より高付加価値な発光体を提供できることになる。 Further, the change in the relative angle between the light source device 10 and the observer described above not only improves the recognizability by moving the moire fringe pattern, but also moves the moire fringe pattern from the center. Since it is reversed, it becomes possible to make the moiré fringe pattern appear from the central portion or disappear at the central portion, thereby providing a light-emitting body with higher added value.
 ここで、上述した(第2の)テクスチャー16の角度θ3、θ4(図4(B)及び(C)を参照)については、コントラストを高くする条件及び発光部表面13aからの出射光の正面輝度を高くする条件で検討を行った結果、共に、42±3度が好ましいことが分かった。 Here, for the angles [theta] 3 and [theta] 4 of the (second) texture 16 described above (see FIGS. 4B and 4C), the condition for increasing the contrast and the front luminance of the emitted light from the light emitting portion surface 13a As a result of examination under the condition of increasing the height, it was found that 42 ± 3 degrees is preferable in both cases.
 加えて、テクスチャー16の深さは、発光部表面13aの輝度分布における均一性の観点からは、光導入部14a、14bの近傍となる端部では浅く、中央部に向かって深くなるように設定することが好ましい。ここでは、光導入部14a、14bの近傍では0.1mmとし、中央部では0.38mmとした。 In addition, the depth of the texture 16 is set so that it is shallow at the end near the light introducing portions 14a and 14b and deeper toward the center from the viewpoint of uniformity in the luminance distribution of the light emitting portion surface 13a. It is preferable to do. Here, it was set to 0.1 mm in the vicinity of the light introducing portions 14a and 14b, and 0.38 mm in the central portion.
 また、本発明が関わる光源装置では、その光源である、例えば、固体光源が消灯している場合においても、その視認性がある程度確保されることが好ましく、より具体的には、外光をある程度反射可能であることが好ましい。 Further, in the light source device according to the present invention, even when the light source, for example, the solid light source is turned off, it is preferable to ensure the visibility to some extent, and more specifically, the external light is applied to some extent. It is preferably reflective.
 そのため、発光部裏面13bには、図6にも示す様に、前述したテクスチャー16と合わせて、(第3の)テクスチャー17a又はテクスチャー17bを設けることが好ましく、これによれば、外光を反射する機能が付与される。なお、図6(A)及び(B)には、それぞれ傾斜角45度及び傾斜角45度以上のテクスチャー17により外光が反射する際の光線路が示されている。一般的に外光は水平方向より上部から入射する光の強度が高いので、テクスチャー17a又はテクスチャー17bの傾斜角度θ5a、θ5b,θ6a、θ6bは、水平方向より上部からの外光を効率良く正面に反射させるため、共に45度より大きい方が好ましい。また、図示の例では、テクスチャー17a又はテクスチャー17bのピッチP3(図4(C)を参照)は2mmに、また、その高さD3a又はD3bは0.85mmとした。 Therefore, it is preferable to provide the (third) texture 17a or the texture 17b on the light emitting portion back surface 13b together with the texture 16 described above, as shown in FIG. Function is given. FIGS. 6A and 6B show optical lines when external light is reflected by the texture 17 having an inclination angle of 45 degrees and an inclination angle of 45 degrees or more, respectively. In general, since the intensity of light incident from the upper side is higher than that in the horizontal direction, the inclination angles θ5a, θ5b, θ6a, and θ6b of the texture 17a or the texture 17b make the external light from the upper side in the horizontal direction efficient. Both are preferably larger than 45 degrees for reflection. In the illustrated example, the pitch P3 (see FIG. 4C) of the texture 17a or the texture 17b is 2 mm, and the height D3a or D3b is 0.85 mm.
 また、導光体11の発光部裏面13bの一部には、図5に示した様に、文字あるいは模様を形成することもできる。 Moreover, as shown in FIG. 5, a character or a pattern can be formed on a part of the light emitting portion back surface 13b of the light guide 11.
 図5にも示す様に、この実施例では、テクスチャー16、テクスチャー17の表面の一部を、凹形状に除去して得られる形状にすることにより、発光部表面13aの一部に文字あるいは模様が認識できるように構成されている。即ち、このようにテクスチャー16の一部を選択的に除去することによれば、その部分ではモアレ縞の発生が無くなり、当該エリアの外のモアレ縞発生部との対比により、文字あるいは模様の表示の認識性の向上が期待できる。従って、本構造は、注意喚起等の表示灯として好適な構成である。 As shown also in FIG. 5, in this embodiment, a part of the surface of the texture 16 and the texture 17 is formed into a shape obtained by removing it into a concave shape, whereby a character or pattern is formed on a part of the light emitting portion surface 13a. Is configured to be recognized. That is, by selectively removing a part of the texture 16 in this way, the generation of moire fringes is eliminated in that part, and the display of characters or patterns is made by contrast with the moire fringe generation part outside the area. Can be expected to be improved. Therefore, this structure is a suitable structure as an indicator lamp for alerting.
 また、ここでは図示はしないが、テクスチャー16、テクスチャー17のピッチや位相を変えることによっても、当該部分でのモアレ縞の発生位相を異ならしめ、もって、当該エリアの外における位相の異なるモアレとの対比により、上述と同様に、文字あるいは模様の表示の認識性を向上することが可能である。なお、前述した文字あるいは模様としては、図9にも示す様に、目的に応じた注意を喚起する文字あるいは模様が形成可能である。 Although not shown here, by changing the pitch and phase of the texture 16 and the texture 17, the generation phase of moire fringes in the portion is made different, so that the moire having a different phase outside the area is changed. By comparison, the recognizability of the display of characters or patterns can be improved as described above. As the above-described characters or patterns, as shown in FIG. 9, it is possible to form characters or patterns that call attention according to the purpose.
 (実施例2)
 上述した実施例1では、対向面(下側面)13b側、即ち、発光部裏面13bに形成されるテクスチャー16、テクスチャー17の断面形状として、凸形状のものに関して説明したが、本発明はこれにのみ限定されるものではなく、例えば、屋根型形状、又は、シリンドリカル形状のものでも良く、あるいは、図7に示す様に凹形状でも良い。
(Example 2)
In the first embodiment described above, the convex shape is described as the cross-sectional shape of the texture 16 and the texture 17 formed on the opposite surface (lower side) 13b side, that is, the light emitting portion back surface 13b. For example, it may be a roof shape or a cylindrical shape, or may be a concave shape as shown in FIG.
 実施例2では、発光部裏面13bに凹形状のテクスチャー26、テクスチャー27が形成されている。ここで、テクスチャー26のピッチP2、テクスチャー27のピッチP3は、実施例1で示したテクスチャー16及びテクスチャー17のピッチと同様で良い。同様に、テクスチャー26の角度θ3,θ4の値はテクスチャー16の角度と同様で良い。
 また、実施例1と同様に、本発明が関わる光源装置では、その光源である、例えば、固体光源が消灯している場合においても、その視認性がある程度確保されることが好ましく、より具体的には、外光をある程度反射可能であることが好ましい。
In Example 2, the concave texture 26 and the texture 27 are formed on the light emitting portion back surface 13b. Here, the pitch P2 of the texture 26 and the pitch P3 of the texture 27 may be the same as the pitches of the texture 16 and the texture 17 shown in the first embodiment. Similarly, the angles θ3 and θ4 of the texture 26 may be the same as the angle of the texture 16.
Similarly to the first embodiment, in the light source device according to the present invention, it is preferable that the visibility is ensured to some extent even when the light source, for example, the solid light source is turned off, is more specific. It is preferable that external light can be reflected to some extent.
 そのため、発光部裏面13bには、図8にも示す様に、前述したテクスチャー26と合わせて、(第3の)テクスチャー27a又はテクスチャー27bを設けることが好ましく、これによれば、外光を反射する機能が付与される。なお、図8(A)及び(B)には、それぞれ傾斜角45度及び傾斜角45度以上のテクスチャー27により外光が反射する際の光線路が示されている。 Therefore, as shown in FIG. 8, it is preferable to provide the (third) texture 27a or the texture 27b on the light emitting portion back surface 13b in addition to the texture 26 described above. Function is given. 8A and 8B show optical lines when external light is reflected by the texture 27 having an inclination angle of 45 degrees and an inclination angle of 45 degrees or more, respectively.
 一般的に外光は水平方向より上部から入射する光の強度が高いので、テクスチャー27a又はテクスチャー27bの傾斜角度θ5a、θ5b,θ6a、θ6bは、水平方向より上部からの外光を効率良く正面に反射させるため、共に45度より大きい方が好ましい。また、図示の例では、テクスチャー27a又はテクスチャー27bのピッチP3(図4(C)を参照)は2mmに、また、その高さD3a又はD3bは0.9mmとした。 In general, since the intensity of light incident from above is higher than that in the horizontal direction, the inclination angles θ5a, θ5b, θ6a, and θ6b of the texture 27a or the texture 27b can effectively make the external light from the upper side in the horizontal direction forward. Both are preferably larger than 45 degrees for reflection. In the illustrated example, the pitch P3 (see FIG. 4C) of the texture 27a or the texture 27b is 2 mm, and the height D3a or D3b is 0.9 mm.
 なお、上記に詳述した実施例においては、固体光源23a、23bは、必ずしも、同時に連続して発光するものに限定されるものではなく、その他、点滅させ、又は、交互に点灯させたりすることも可能である。特に、発生するモアレの矢印の方向を揃え、前記矢印の方向と同一による様に点滅を行うことによれば、認識性に優れた順路を案内することが可能な表示版用灯具、あるいは、車両用灯具である方向指示灯具を提供することが可能となる。 In the embodiment described in detail above, the solid light sources 23a and 23b are not necessarily limited to those that emit light continuously at the same time, and may be blinked or alternately turned on. Is also possible. In particular, by aligning the direction of the generated moire arrow and flashing in the same manner as the direction of the arrow, a lamp for a display plate capable of guiding a route with excellent recognizability, or a vehicle It is possible to provide a direction indicating lamp that is a lamp for use.
 以上、本発明の種々の実施例に係る映像投射機能付き照明装置について述べた。しかしながら、本発明は、上述した実施例のみに限定されるものではなく、様々な変形例が含まれる。例えば、上記した実施例は本発明を分かりやすく説明するためにシステム全体を詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。 In the above, the illumination device with a video projection function according to various embodiments of the present invention has been described. However, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments are described in detail for the entire system in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described.
 また、ある実施例の構成の一部を他の実施例の構成に置き換えることが可能であり、また、ある実施例の構成に他の実施例の構成を加えることも可能である。また、各実施例の構成の一部について、他の構成の追加・削除・置換をすることが可能である。 Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.
 10…光源装置、11…導光体、12a、12b…受光部(面)、13…発光部、13a、13b…(発光部の)上側及び下側面、14a、14b…光導入部、15、16,17…テクスチャー、21…ケース、22…蓋部材、23a、23b…固体光源、24a、24b…基板。 DESCRIPTION OF SYMBOLS 10 ... Light source device, 11 ... Light guide, 12a, 12b ... Light-receiving part (surface), 13 ... Light emission part, 13a, 13b ... (Upper side and lower side surface) (14a, 14b ... Light introduction part, 15, 16, 17 ... Texture, 21 ... Case, 22 ... Lid member, 23a, 23b ... Solid light source, 24a, 24b ... Substrate.

Claims (14)

  1.  光源と、前記光源からの光を内部で伝搬して外部に出射する導光体と、を備えた光源装置であって、
     前記導光体は、少なくとも光を出射する第1の面と、前記第1の面に対向して略平行な第2の面を有し、
     前記第1の面及び前記第2の面には、少なくともそれぞれピッチの異なる周期状の第1のテクスチャーと第2のテクスチャーとがそれぞれ形成されており、
     前記第1のテクスチャーと前記第2のテクスチャーにより生じる光の濃淡の干渉により、動的な表示と静的な表示とを含む表示を発生させる、
    光源装置。
    A light source device comprising: a light source; and a light guide that propagates light from the light source and emits the light to the outside.
    The light guide has at least a first surface for emitting light and a second surface substantially parallel to the first surface,
    On the first surface and the second surface, at least a periodic first texture and a second texture having different pitches are formed, respectively.
    A display including a dynamic display and a static display is generated by interference of light and shade caused by the first texture and the second texture;
    Light source device.
  2.  請求項1に記載の光源装置において、
     前記動的な表示は、前記第1のテクスチャーと前記第2のテクスチャーにより生じる光の濃淡の干渉によりモアレ模様である、光源装置。
    The light source device according to claim 1,
    The dynamic display is a light source device in which a moiré pattern is formed due to light and shade interference caused by the first texture and the second texture.
  3.  請求項1に記載の光源装置において、
     前記第2の面には、前記第1の面から入射する外部からの光の一部を反射して再び外部へ出射するため、更に、前記第2のテクスチャーと略直交する第3のテクスチャーが形成されている、光源装置。
    The light source device according to claim 1,
    The second surface has a third texture that is substantially orthogonal to the second texture in order to reflect a part of the external light incident from the first surface and emit the light again to the outside. A light source device is formed.
  4.  請求項2に記載の光源装置において、
     前記第1のテクスチャーに対する前記第2のテクスチャーの相対位置が変わる方向を異ならせることにより、前記モアレ模様の移動方向が異なるようにした、光源装置。
    The light source device according to claim 2,
    The light source device in which the moving direction of the moire pattern is made different by changing the direction in which the relative position of the second texture changes with respect to the first texture.
  5.  請求項4に記載の光源装置において、
     前記第1のテクスチャーと第2のテクスチャーのピッチの大小関係を、前記導光体の位置により切り替わるようにしたことにより、前記モアレ模様の移動方向が異なるようにした、光源装置。
    The light source device according to claim 4,
    The light source device in which the moving direction of the moire pattern is made different by switching the magnitude relationship between the pitches of the first texture and the second texture depending on the position of the light guide.
  6.  請求項3に記載の光源装置において、
     前記第2の面に形成された前記第2のテクスチャー、又は、前記第2のテクスチャー及び前記第3のテクスチャーの一部が、選択的に除去されており、除去部分での出射光分布が、テクスチャーが除去されていない部分での出射光分布とは異なっている、光源装置。
    The light source device according to claim 3.
    The second texture formed on the second surface, or part of the second texture and the third texture is selectively removed, and the emitted light distribution at the removed portion is A light source device that is different from the emitted light distribution in a portion where the texture is not removed.
  7.  請求項3に記載の光源装置において、
     前記第2の面に形成された前記第2のテクスチャー、又は、前記第2のテクスチャー及び前記第3のテクスチャーの一部が選択的に変化しており、変化部分における出射光分布が、テクスチャーが選択的に変化していない部分での出射光分布とは異なっている、光源装置。
    The light source device according to claim 3.
    The second texture formed on the second surface, or part of the second texture and the third texture is selectively changed, and the emitted light distribution in the changed portion is the texture A light source device that is different from an outgoing light distribution in a portion that is not selectively changed.
  8.  請求項1に記載の光源装置において、
     前記第1の面の前記第1のテクスチャーは、凸状で屋根型の断面形状を有している、光源装置。
    The light source device according to claim 1,
    The light source device, wherein the first texture of the first surface is convex and has a roof-shaped cross-sectional shape.
  9.  請求項1に記載の光源装置において、
     前記第1の面の前記第1のテクスチャーは凸状でシリンドリカル形状の断面形状を有している、光源装置。
    The light source device according to claim 1,
    The light source device, wherein the first texture of the first surface is convex and has a cylindrical cross-sectional shape.
  10.  請求項1に記載の光源装置において、
     前記光源は、個体発光素子からなる固体光源である、光源装置。
    The light source device according to claim 1,
    The light source is a light source device, which is a solid light source composed of a solid light emitting element.
  11.  少なくとも、光源と、前記光源からの光を内部で伝搬して外部に出射する導光体と、を備えた光源装置を有し、車両用制動灯もしくは車両用補助制動灯として取り付ける車両用灯具であって、
     前記光源装置は、請求項1~10のいずれか1項に記載された光源装置からなり、そして、前記第1のテクスチャーのピッチを0.1mm~2.9mmの範囲とした、車両用灯具。
    A vehicle lamp having a light source device including at least a light source and a light guide that propagates light from the light source and emits the light to the outside. The vehicle lamp is mounted as a vehicle brake light or a vehicle auxiliary brake light. There,
    11. The vehicle lamp according to claim 1, wherein the light source device comprises the light source device according to any one of claims 1 to 10, and the pitch of the first texture is in a range of 0.1 mm to 2.9 mm.
  12.  請求項11に記載の車両用灯具において、
     更に、前記第1のテクスチャーのピッチを0.1mm~1.5mmの範囲とし、車両用方向指示灯として取り付けた、車両用灯具。
    The vehicular lamp according to claim 11,
    Further, a vehicle lamp having a pitch of the first texture in a range of 0.1 mm to 1.5 mm and attached as a vehicle direction indicator lamp.
  13.  少なくとも、光源と、前記光源からの光を内部で伝搬して外部に出射する導光体と、を備えた光源装置を有する照明器具であって、
     前記光源装置は、請求項1~10のいずれか1項に記載された光源装置からなり、そして、前記第1のテクスチャーのピッチを0.1mm~0.6mmの範囲とし、屋内の天井面あるいは壁面あるいは屋外に取り付けた、照明器具。
    At least a light source including a light source and a light guide that propagates light from the light source and emits the light to the outside.
    The light source device comprises the light source device according to any one of claims 1 to 10, and the pitch of the first texture is in a range of 0.1 mm to 0.6 mm, and an indoor ceiling surface or Lighting fixtures mounted on the wall or outdoors.
  14.  少なくとも、光源と、前記光源からの光を内部で伝搬して外部に出射する導光体とを備えた光源装置を有する照明器具であって、
     前記光源装置は、請求項1~10のいずれか1項に記載された光源装置からなり、そして、前記第1のテクスチャーのピッチを0.1mm~1.5mmの範囲とし、屋外に取り付けた、照明器具。
    At least a luminaire having a light source device including a light source and a light guide that propagates light from the light source and emits the light to the outside.
    The light source device comprises the light source device according to any one of claims 1 to 10, and the pitch of the first texture is in a range of 0.1 mm to 1.5 mm, and is attached outdoors. lighting equipment.
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