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JP5063974B2 - Lighting device - Google Patents
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JP5063974B2 - Lighting device - Google Patents

Lighting device Download PDF

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Publication number
JP5063974B2
JP5063974B2 JP2006276734A JP2006276734A JP5063974B2 JP 5063974 B2 JP5063974 B2 JP 5063974B2 JP 2006276734 A JP2006276734 A JP 2006276734A JP 2006276734 A JP2006276734 A JP 2006276734A JP 5063974 B2 JP5063974 B2 JP 5063974B2
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Prior art keywords
light
display unit
outer peripheral
peripheral surface
convex portion
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JP2006276734A
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JP2008094201A (en
Inventor
裕信 山本
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Sumitomo Wiring Systems Ltd
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Sumitomo Wiring Systems Ltd
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Priority to JP2006276734A priority Critical patent/JP5063974B2/en
Priority to PCT/JP2007/067665 priority patent/WO2008044415A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/22—Display screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/50—Instruments characterised by their means of attachment to or integration in the vehicle
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/33—Illumination features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Instrument Panels (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

本発明は、車両のインストゥルメントパネルに設けられる計器等を照明するための照明装置に関する。   The present invention relates to an illumination device for illuminating a meter or the like provided on an instrument panel of a vehicle.

従来、車両のインストゥルメントパネル等に設けられる複数の計器類あるいはスイッチ等には、夜間等においてこれらスイッチ等を照明するための照明装置が併設されている。この照明装置としては、特許文献１に、光源と、当該光源からの照明光を前記スイッチ等の表示部に導く導光体とを有し、前記導光体により導かれた前記光源からの照明光を前記表示部の表面側に発光させることでこのスイッチ等を照明する照明装置が開示されている。
特開２０００−１０６０４９号公報 Conventionally, a plurality of instruments or switches provided on an instrument panel or the like of a vehicle is provided with an illumination device for illuminating these switches and the like at night. As this illumination device, Patent Document 1 includes a light source and a light guide that guides illumination light from the light source to a display unit such as the switch, and illumination from the light source guided by the light guide. An illuminating device that illuminates the switch and the like by emitting light on the surface side of the display unit is disclosed.
JP 2000-106049 A

前記スイッチは、インストゥルメントパネル等のデザイン性の観点から多様な形状を有するものが提案されており、その中には、特定方向に延びる形状を有するものがある。このようなスイッチの照明手段として、前記スイッチの表示部に対向するように複数の光源を前記特定方向に並べるものが考えられる。   There have been proposed switches having various shapes from the viewpoint of design, such as an instrument panel, and some of them have shapes extending in a specific direction. As an illumination means for such a switch, a plurality of light sources arranged in the specific direction so as to face the display section of the switch can be considered.

しかしながら、前記のように、特定方向に延びる形状を有するスイッチを照明するために、この形状に合わせて複数の光源を並べる手段では、各光源間の距離が大きいと、前記表示部のうち各光源と対向する部分と各光源の略中間地点と対向する部分とで明るさが一様でなくなってしまうという問題がある。一方、各光源間の距離を小さくすれば、表示部の明るさを一様に近づけることはできるが、この場合には光源の数を増やさねばならないためコストがかかるという問題がある。   However, in order to illuminate a switch having a shape extending in a specific direction as described above, in the means for arranging a plurality of light sources in accordance with this shape, if the distance between the light sources is large, each light source in the display unit There is a problem that the brightness is not uniform between the part facing the light source and the part facing the substantially middle point of each light source. On the other hand, if the distance between the light sources is reduced, the brightness of the display unit can be made uniform. However, in this case, there is a problem in that the number of light sources must be increased, which increases costs.

本発明は、かかる事情に鑑み、簡単な構成で特定方向に延びる表示部の全域にわたって照明光を効率よく導光することができ、低コスト化を図ることのできる照明装置の提供を目的とする。   In view of such circumstances, an object of the present invention is to provide an illuminating device that can efficiently guide illumination light over the entire area of a display portion extending in a specific direction with a simple configuration, and can reduce costs. .

前記課題を解決するための請求項１に係る発明は、車両のインストゥルメントパネル等に設けられて特定方向に延びる表示部と、当該表示部を照明するための照明手段とを備えた照明装置において、前記照明手段は、前記表示部と対向するように前記特定方向にそれぞれ所定の間隔をおいて並べられる複数の光源と、前記複数の光源から発せられる照明光を前記表示部の裏面側に導く導光体とを有し、当該導光体は、前記複数の光源と前記表示部との間に設けられて各光源から発せられる照明光を前記表示部に導く本体部と、当該本体部のうち互いに隣接する２つの光源の各中心部分とそれぞれ対向する部分を特定方向両端部として当該特定方向両端部からこれら２つの光源の略中間地点に向かって突出する凸部とを有し、前記凸部の外周面は、連続する曲面であって、当該凸部の特定方向両端部と対向する位置に配置された２つの光源の一方の光源から他方の光源側に向けて互いに異なる方向に発せられて当該凸部の外周面の互いに異なる部分に入射した複数の光線と、他方の光源から一方の光源側に向けて互いに異なる方向に発せられて当該凸部の外周面の互いに異なる部分に入射した複数の光線とを、当該外周面でそれぞれ屈折させることで、これら複数の光線を前記表示部のうち前記２つの光源の略中間地点と対向する部分に集束させる形状を有し、前記本体部は、前記凸部の特定方向両端部であって隣接する前記光源の各中心部分とそれぞれ対向する部分から前記凸部と離間する方向に延びる外側外周面を有し、前記外側外周面は、当該外側外周面の互いに異なる部分に入射した複数の光線を、前記表示部のうち当該外側外周面と対向する部分の互いに異なる位置にそれぞれ導くように、前記表示部と略平行に延びる平板状を有し、前記表示部は、前記導光体により導かれた前記照明光を裏面側に受けることにより表面側に発光することを特徴とするものである。
The invention according to claim 1 for solving the above-described problem is an illuminating device including a display unit provided in an instrument panel or the like of a vehicle and extending in a specific direction, and an illuminating unit for illuminating the display unit. The illumination means includes a plurality of light sources arranged at predetermined intervals in the specific direction so as to face the display unit, and illumination light emitted from the plurality of light sources on the back side of the display unit. A light guide that guides the illumination light emitted from each light source to the display, and the light guide is provided between the light sources and the display. and a convex portion that gives impact toward a substantially middle point of the two light sources from the specific direction end portions of each central portion and a portion facing each of the two adjacent light sources as specified direction both end portions to each other among the Outer peripheral surface of the convex portion A continuous curved surface that is emitted from one light source of two light sources arranged at positions facing both ends in a specific direction of the convex portion toward the other light source in different directions. A plurality of light beams incident on different portions of the outer peripheral surface and a plurality of light beams emitted in different directions from the other light source toward the one light source side and incident on different portions of the outer peripheral surface of the convex portion Each of the plurality of light beams is refracted on the outer peripheral surface so that the light beam is focused on a portion of the display unit facing a substantially middle point of the two light sources . It has an outer peripheral surface extending in a direction away from the convex portion from a portion facing each central portion of the light source adjacent to both ends in a specific direction, and the outer peripheral surface is different from the outer peripheral surface. Part A plurality of light rays shines, the so guided respectively at different positions of the outer peripheral surface facing the portion of the display unit has a flat plate shape extending substantially parallel to the display unit, the display unit, the Ru der which is characterized in that emitting surface side by receiving the illumination light guided by the light guide on the back side.

本発明によれば、前記各光源から発せられる照明光が前記導光体の本体部によって前記表示部に導かれるのに加えて、各光源から発せられる照明光のうち各光源から隣接する他の光源側に向けて発せられる光線が前記導光体の凸部の外周面で屈折することで、前記表示部のうち各光源の略中間地点と対向する部分にも前記照明光が導かれる。従って、各光源どうしが離間していても、表示部のうち各光源の略中間地点と対向する部分が暗くなるのが抑制されるので、各光源間の距離を小さくすることなく、すなわち、多数の光源を用いることなく表示部全体をより一様な明るさで照明することができる。   According to the present invention, in addition to the illumination light emitted from each light source being guided to the display unit by the main body portion of the light guide, other illumination light emitted from each light source adjacent to each light source. The light emitted toward the light source side is refracted on the outer peripheral surface of the convex portion of the light guide, so that the illumination light is also guided to the portion of the display portion that faces the substantially middle point of each light source. Accordingly, even if the light sources are separated from each other, the portion of the display unit that faces the substantially intermediate point of each light source is suppressed from being darkened. The entire display unit can be illuminated with more uniform brightness without using the light source.

この構成では、各光源から互いに異なる方向に発せられる複数の光線が前記表示部のうち前記各光源の略中間地点と対向する部分に集束するので、この各光源の略中間地点と対向する部分により多くの照明光を導くことができ、表示部全体をより均一に照明することが可能になる。   In this configuration, since a plurality of light beams emitted from the respective light sources in different directions are focused on a portion of the display unit that faces a substantially intermediate point of the light sources, A lot of illumination light can be guided, and the entire display unit can be illuminated more uniformly.

このように凸部の外周面を連続する曲面とすれば、各光源から互いに異なる方向に発せられる複数の光線をより多く前記表示部のうち前記各光源の中間地点と対向する部分に集束させることができる。   Thus, if the outer peripheral surface of the convex portion is a continuous curved surface, a plurality of light beams emitted from the respective light sources in different directions can be more focused on the portion of the display unit facing the intermediate point of the respective light sources. Can do.

以上説明したように、本発明によれば、簡単な構成で、特定方向に延びる表示部全体を均一に発光させることのできる照明装置を提供することができる。   As described above, according to the present invention, it is possible to provide an illumination device that can emit light uniformly over the entire display portion extending in a specific direction with a simple configuration.

以下、本発明の好ましい実施の形態について、本発明にかかる照明装置を車載用オーディオの操作部の照明装置に適用した場合を例として説明する。   Hereinafter, a preferred embodiment of the present invention will be described by taking as an example a case where the lighting device according to the present invention is applied to a lighting device for an operation unit of a vehicle-mounted audio.

図１は本発明に係る照明装置を備えた車載用オーディオの操作部の分解斜視図である。図２は、この車載用オーディオの操作部に設けられる照明装置の概略上面図である。   FIG. 1 is an exploded perspective view of an operation unit of an in-vehicle audio equipped with a lighting device according to the present invention. FIG. 2 is a schematic top view of the illumination device provided in the operation unit of the vehicle-mounted audio.

前記車載用オーディオの操作部１は、図示しない車両のインストゥルメントパネル等に設けられており、主に基板２と操作パネル３とを備えている。基板２には、後述するランプや各種回路等が搭載されている。前記操作パネル３には運転者等が操作可能な複数のスイッチボタンが設けられている。また、この車載用オーディオの操作部１には、夜間等に前記スイッチボタン等の位置を明示するための照明装置が設けられている。   The on-vehicle audio operation unit 1 is provided on an instrument panel or the like (not shown) of the vehicle, and mainly includes a substrate 2 and an operation panel 3. On the substrate 2, lamps and various circuits described later are mounted. The operation panel 3 is provided with a plurality of switch buttons that can be operated by a driver or the like. In addition, the on-vehicle audio operation unit 1 is provided with a lighting device for clearly indicating the position of the switch button or the like at night.

本発明に係る照明装置５０は、前記複数のスイッチボタンのうち、特に水平方向（図１にて左右方向）に延びる形状を有するスイッチボタン１１の位置を夜間等に明示するためのものである。   The lighting device 50 according to the present invention is for clearly indicating the position of the switch button 11 having a shape extending in the horizontal direction (left and right direction in FIG. 1) among the plurality of switch buttons at night.

具体的には、このスイッチボタン１１の上面あるいは下面の形状に沿って水平方向に延びる形状を有する表示部１２が、操作パネル３のうち、スイッチボタン１１が取り付けられる位置の上部あるいは下部に取り付けられる。そして、この表示部１２の裏側に照明手段１０が取り付けられて、この照明手段１０によってその裏面側から照明されることで、表示部１２が表面側に発光する。このようにして表示部１２が発光すれば、運転者等はこの表示部１２の近傍に設けられたスイッチボタン１１の位置を認識することができる。表示部１２は、その裏面側から照射される照明光を透過して表側面が発光するように、少なくともその一部が透明または半透明な材料で成形されている。   Specifically, the display unit 12 having a shape extending in the horizontal direction along the shape of the upper or lower surface of the switch button 11 is attached to the upper or lower portion of the operation panel 3 where the switch button 11 is attached. . And the illumination means 10 is attached to the back side of this display part 12, and the display part 12 light-emits to the surface side by being illuminated from the back surface side by this illumination means 10. FIG. If the display unit 12 emits light in this manner, the driver or the like can recognize the position of the switch button 11 provided in the vicinity of the display unit 12. At least a part of the display unit 12 is formed of a transparent or translucent material so that the front side surface emits light through the illumination light irradiated from the back side.

照明手段１０は、前記基板２に設けられた２つのランプ（光源）３０と、これら２つのランプ３０から発せられる照明光を前記表示部１２の裏面側に導光する導光体２０とを備えている。   The illumination means 10 includes two lamps (light sources) 30 provided on the substrate 2 and a light guide 20 that guides illumination light emitted from the two lamps 30 to the back side of the display unit 12. ing.

前記ランプ３０は、前記表示部１２に対向するように、この表示部１２の長手方向に沿って所定の間隔を置いて設置されている。また、各ランプ３０の発光部３０ａは、その光軸中心が表示部１２側を向くよう設置されている。すなわち、前記表示部１２のうち光軸方向にあたる各ランプ３０と対向する部分には十分な照明光が照射される。一方、この光軸方向の外側への光量は小さくなるので、従来のように、単純に表示部１２に対してランプ３０を並べただけでは、表示部１２のうちランプ３０の中間地点と対向する部分、すなわち、いずれのランプ３０からも離間している部分は、前記ランプ３０に対向する部分に比べて暗くなってしまう。   The lamps 30 are installed at predetermined intervals along the longitudinal direction of the display unit 12 so as to face the display unit 12. Further, the light emitting section 30a of each lamp 30 is installed such that the center of the optical axis faces the display section 12 side. That is, sufficient illumination light is applied to the portion of the display unit 12 facing each lamp 30 in the optical axis direction. On the other hand, since the amount of light to the outside in the optical axis direction is small, simply placing the lamps 30 on the display unit 12 as in the prior art faces the intermediate point of the lamps 30 in the display unit 12. The portion, that is, the portion that is separated from any lamp 30 is darker than the portion that faces the lamp 30.

前記導光体２０は、図２に示すように、前記基板２およびこの基板２に設けられたランプ３０と前記表示部１２との間に設けられている。そして、この導光体２０は、その大部分を占める本体部２１と、この本体部２１から基板２側に突出する凸部２２とを有している。また、本実施形態では、この導光体２０の表側面によって前記表示部１２が形成されている。   As shown in FIG. 2, the light guide 20 is provided between the display unit 12 and the substrate 2 and the lamp 30 provided on the substrate 2. And this light guide 20 has the main-body part 21 which occupies most and the convex part 22 which protrudes from this main-body part 21 to the board | substrate 2 side. In the present embodiment, the display unit 12 is formed by the front side surface of the light guide 20.

前記凸部２２は、前記表示部１２のうちランプ３０の中間地点と対向する部分に照明光を導くためのものである。この凸部２２は、本体部２１のうち２つのランプ３０と対向する部分から、これらランプ３０の中間地点に向かって突出する形状を有している。また、この凸部２２の外周面２２ａは、連続する曲面からなり、ランプ３０の中間地点を通り基板２に垂直な線に対して対称となるような形状を有している。さらに、この凸部２２の外周面２２ａは、各ランプ３０から他方のランプ３０側に向けて発せられる複数の光線をそれぞれ屈折させることにより、これら複数の光線を表示部１２のうち２つのランプ３０の中間地点に対向する部分に集束させるような形状を有している。   The convex portion 22 is for guiding illumination light to a portion of the display portion 12 that faces the midpoint of the lamp 30. The convex portion 22 has a shape projecting from a portion of the main body portion 21 facing the two lamps 30 toward an intermediate point between the lamps 30. Further, the outer peripheral surface 22 a of the convex portion 22 is formed of a continuous curved surface, and has a shape that is symmetric with respect to a line that passes through an intermediate point of the lamp 30 and is perpendicular to the substrate 2. Further, the outer peripheral surface 22a of the convex portion 22 refracts a plurality of light beams emitted from the respective lamps 30 toward the other lamp 30 side, thereby causing the plurality of light beams to be emitted from the two lamps 30 in the display unit 12. It has a shape that converges on the part facing the middle point.

すなわち、ランプ３０からこの凸部２２の外周面２２ａに入射した複数の光線は、それぞれ屈折して表示部１２側に導光される。そして、これら光線のうち外周面２２ａの所定の位置に所定の角度で入射した光線は、前記外周面２２ａで屈折することにより前記ランプ３０の中間地点に対向する部分に集束する。   That is, a plurality of light beams incident on the outer peripheral surface 22a of the convex portion 22 from the lamp 30 are refracted and guided to the display portion 12 side. Of these light rays, the light rays that are incident on the outer peripheral surface 22a at a predetermined angle are refracted by the outer peripheral surface 22a to be focused on a portion facing the intermediate point of the lamp 30.

一方、前記導光体２０の外周面のうち前記凸部２２から左右外側に設けられている外側外周面２０ｂは表示部１２とほぼ平行に伸びる平板形状を有している。従って、ランプ３０からこの外側外周面２０ｂに入射した複数の光線は集束することなく直進あるいは屈折して表示部１２へ導かれる。   On the other hand, of the outer peripheral surface of the light guide 20, the outer outer peripheral surface 20 b provided on the left and right outer sides from the convex portion 22 has a flat plate shape extending substantially parallel to the display unit 12. Accordingly, a plurality of light beams incident on the outer peripheral surface 20b from the lamp 30 are guided straightly or refracted without being converged and are guided to the display unit 12.

前記導光体２０の凸部２２と本体部２１とは一体に形成されており、前述のように、この本体部２１の表側面が表示部１２を形成している。そして、この導光体２０は、ランプ３０からの照明光を透過できるガラスや透明合成樹脂等の透明材料であって、この照明光を前記凸部２２の外周面２２ａで屈折できるようなもので構成されればよいが、軽量であり比較的加工が容易であるメタクリル樹脂やポリカーボネイド等を用いるのが好ましい。   The convex portion 22 and the main body portion 21 of the light guide 20 are integrally formed, and the front side surface of the main body portion 21 forms the display portion 12 as described above. The light guide 20 is a transparent material such as glass or transparent synthetic resin that can transmit the illumination light from the lamp 30, and can refract the illumination light on the outer peripheral surface 22 a of the convex portion 22. However, it is preferable to use a methacrylic resin or polycarbonate that is lightweight and relatively easy to process.

次に、ランプ３０から発せられる照明光が前記表示部１２に導光されるまでの様子について説明する。   Next, how the illumination light emitted from the lamp 30 is guided to the display unit 12 will be described.

まず、図２のＬ１のように、ランプ３０から表示部１２に向けてほぼ真っ直ぐに発せられた光線は、導光体２０の前記外側外周面２０ｂに入射する。そして、これら光線は、そのほとんどが屈折することなくそのまま導光体２０の本体部２１を通り、その表側に形成された表示部１２に導かれる。   First, as indicated by L <b> 1 in FIG. 2, a light beam emitted substantially straight from the lamp 30 toward the display unit 12 enters the outer peripheral surface 20 b of the light guide 20. And most of these light rays pass through the main body 21 of the light guide 20 without being refracted, and are guided to the display unit 12 formed on the front side.

また、図２のＬ２のように、各ランプ３０から表示部１２に対して所定の角度で左右外側に向けて発せられた複数の光線も、前記外側外周面２０ｂに入射する。これらの光線は、Ｌ１の場合と異なりこの外側外周面２０ｂに所定の角度で入射されるので、表示部１２側に屈折して表示部１２に導かれる。   Further, as indicated by L2 in FIG. 2, a plurality of light beams emitted from the lamps 30 toward the left and right outer sides at a predetermined angle with respect to the display unit 12 also enter the outer peripheral surface 20b. Unlike the case of L1, these light rays are incident on the outer peripheral surface 20b at a predetermined angle, so that they are refracted toward the display unit 12 and guided to the display unit 12.

一方、図３のＬ３およびＬ４のように、各ランプ３０から他方のランプ３０に向けて発せられた複数の光線は、前記凸部２２の外周面２２ａに入射する。これらの光線は、この外周面２２ａでそれぞれの入射角に対応した角度で表示部１２側に屈折して表示部１２に導光される。   On the other hand, as indicated by L3 and L4 in FIG. 3, a plurality of light beams emitted from each lamp 30 toward the other lamp 30 enter the outer peripheral surface 22a of the convex portion 22. These light rays are refracted toward the display unit 12 at an angle corresponding to each incident angle on the outer peripheral surface 22a and guided to the display unit 12.

ここで、これら他方のランプ３０に向けて発せられた複数の光線のうち、凸部２２の外周面２２ａの所定位置に所定角度で入射した複数の光線は、図３のＬ３のように、外周面２２ａで屈折することで、表示部１２のうちランプ３０の中間地点と対向する領域Ａに導光される。すなわち、前記複数の光線は、凸部２２によって当該領域Ａに集束する。また、前記のように凸部２２の外周面２２ａはランプ３０の中間地点に対して対称となるような形状を有しているので、この領域Ａには２つのランプ３０から発せられる照明光が集束することになる。   Here, among the plurality of light beams emitted toward the other lamp 30, the plurality of light beams incident on the predetermined position of the outer peripheral surface 22 a of the convex portion 22 at a predetermined angle are as shown in L <b> 3 of FIG. 3. By being refracted by the surface 22a, the light is guided to a region A of the display unit 12 facing the intermediate point of the lamp 30. That is, the plurality of light beams are focused on the region A by the convex portion 22. Further, as described above, the outer peripheral surface 22a of the convex portion 22 has a shape that is symmetric with respect to the intermediate point of the lamp 30, so that the illumination light emitted from the two lamps 30 is present in this region A. Will be focused.

このようにして、表示部１２のうち各ランプ３０の中間地点と対向する領域Ａにも十分な照明光が導光される。   In this way, sufficient illumination light is also guided to the area A of the display unit 12 that faces the intermediate point of each lamp 30.

従って、表示部１２には全域にわたって一様な照明光が導光されることになり、表示部１２はその長手方向に一様に発光することができる。   Accordingly, uniform illumination light is guided to the display unit 12 over the entire area, and the display unit 12 can emit light uniformly in the longitudinal direction.

次に、前記導光体２０の凸部２２の参考例について図３および図４を用いて説明する。
Next, a reference example of the convex portion 22 of the light guide 20 will be described with reference to FIGS.

図３は、参考例に係る導光体を示す概略上面図であり、図４は他の参考例に係る導光体を示す概略上面図である。
Figure 3 is a schematic top view showing a light guide according to a reference example, FIG. 4 is a schematic top view showing a light guide according to another reference example.

図３に示す導光体１２０の凸部１２２の外周面１２２ａは、各ランプ３０と対向する位置から２つのランプ３０の中間地点に向かって傾斜する平面形状を有する傾斜面１２２ｂと、前記表示部１２と略平行な平面１２２ｃとからなっている。
The outer peripheral surface 122a of the convex portion 122 of the light guide 120 shown in FIG. 3 has an inclined surface 122b having a planar shape inclined from a position facing each lamp 30 toward an intermediate point between the two lamps 30, and the display unit. 12 and a plane 122c substantially parallel to the surface.

一方、図４に示す導光体２２０の凸部２２２の外周面２２２ａは、各ランプ３０と対向する位置から２つのランプ３０の中間地点に向かって傾斜する平面形状を有する傾斜面２２２ｂとからなっている。
On the other hand, the outer peripheral surface 222 a of the convex portion 222 of the light guide body 220 shown in FIG. 4 is composed of an inclined surface 222 b having a planar shape that is inclined from a position facing each lamp 30 toward an intermediate point between the two lamps 30. ing.

そして、ランプ３０から他方のランプ３０側に向けて発せられる光線は、各傾斜面１２２ｂ、２２２ｂで表示部１２側に屈折して表示部１２側に導かれる。さらに、各傾斜面１２２ｂ、２２２ｂの傾斜角および各傾斜面１２２ｂ、２２２ｂに対するランプ３０の位置を調整すれば、前記ランプ３０から他方のランプ３０側に向けて発せられる複数の光線のうち、傾斜面１２２ｂ、２２２ｂの所定位置に所定角度で入射する複数の光線を表示部１２側に屈折させて、表示部１２のうちランプ３０の中間地点と対向する前記領域Ａに集束させることができる。特に、このように外周面１２２ａ、２２２ａを平面で構成すれば、加工を容易にすることができる。
Light rays emitted from the lamp 30 toward the other lamp 30 are refracted toward the display unit 12 by the inclined surfaces 122b and 222b and guided to the display unit 12 side. Furthermore, the inclined surfaces 122b, the inclination angle and the inclined surfaces 122b of the 222b, by adjusting the position of the lamp 30 relative to 222b, among the pre-SL from the lamp 30 a plurality of emitted toward the other lamp 30 side beams, inclined A plurality of light rays incident at predetermined angles on the surfaces 122b and 222b at a predetermined angle can be refracted toward the display unit 12 and focused on the region A of the display unit 12 facing the intermediate point of the lamp 30. In particular, if the outer peripheral surfaces 122a and 222a are configured in this way, processing can be facilitated.

以上のように、本照明装置によれば、ランプ３０からの照明光を表示部１２に導光する導光体２０に本体部２１と凸部２２とが設けられているので、前記各ランプ３０から発せられる照明光が前記導光体２０の本体部２１によって前記表示部１２に導かれるのに加えて、各ランプ３０から発せられる照明光のうち各ランプ３０から隣接する他のランプ３０側に向けて発せられる光線が前記導光体２０の凸部２２の外周面２２ａで屈折して、前記表示部１２のうち各ランプ３０の略中間地点と対向する部分に導かれる。従って、各ランプ３０どうしが離間していても、表示部１２のうち各ランプ３０の略中間地点と対向する部分が暗くなるのを抑制することができるので、各ランプ３０間の距離を小さくすることなく、すなわち、多数のランプ３０を用いることなく表示部１２全体を一様な明るさで照明することができる。   As described above, according to the present lighting device, the light guide 20 that guides the illumination light from the lamp 30 to the display unit 12 is provided with the main body portion 21 and the convex portion 22, so that each of the lamps 30. In addition to the illumination light emitted from each lamp 30 being guided to the display unit 12 by the main body 21 of the light guide 20, the illumination light emitted from each lamp 30 is directed to the other lamp 30 adjacent to each lamp 30. The light rays emitted toward the light guide body 20 are refracted by the outer peripheral surface 22a of the convex portion 22 of the light guide 20, and are guided to a portion of the display portion 12 that is opposed to a substantially intermediate point of each lamp 30. Therefore, even if the lamps 30 are separated from each other, it is possible to suppress the portion of the display unit 12 that faces the substantially middle point of the lamps 30 from being darkened, and thus the distance between the lamps 30 is reduced. That is, the entire display unit 12 can be illuminated with uniform brightness without using a large number of lamps 30.

また、前記凸部２２を、各ランプ３０から隣接する他のランプ３０に向けて互いに異なる方向に発せられる複数の光線をそれぞれ屈折させることで、これら複数の光線を前記表示部１２のうち各ランプの略中間地点と対向する部分に集束させるような形状としておけば、この各ランプ３０の略中間地点と対向する部分により多くの照明光を導くことができ、表示部１２全体をより均一に照明することができる。   Further, the convex portion 22 refracts a plurality of light beams emitted from the respective lamps 30 toward other adjacent lamps 30 in different directions, so that the plurality of light beams are radiated from the lamps of the display unit 12. If the shape is focused on a portion facing the substantially intermediate point, more illumination light can be guided to the portion of each lamp 30 facing the substantially intermediate point, and the entire display unit 12 is illuminated more uniformly. can do.

また、前記凸部２２を、その外周面２２ａが連続する曲面を有するように形成すれば、ランプ３０から発せられる光線の外周面２２ａへの入射角が、各光線が入射する位置によって多様に変化するので、前記第二、第三の実施形態のように凸部２２の外周面を平面で構成する場合に比べて、各ランプ３０から互いに異なる方向に発せられる複数の光線をより多く前記表示部１２のうち各ランプ３０の中間地点と対向する部分に集束させることができる。   Further, if the convex portion 22 is formed so that the outer peripheral surface 22a has a continuous curved surface, the incident angle of the light beam emitted from the lamp 30 to the outer peripheral surface 22a varies depending on the position where each light beam enters. Therefore, as compared with the case where the outer peripheral surface of the convex portion 22 is configured as a flat surface as in the second and third embodiments, the display unit has more light rays emitted from the lamps 30 in different directions. 12 of the lamps 30 can be focused on a portion facing the intermediate point of each lamp 30.

ここで、前記実施形態では、表示部１２を２つのランプ３０で照明する場合について示したが、ランプ３０の数は、スイッチ１１および表示部１２の長さに応じて調整すればよい。また、ランプ３０の数を増やした場合には、前記凸部２２を各ランプ３０の間に複数設けるようにすればよい。   Here, although the case where the display unit 12 is illuminated with the two lamps 30 has been described in the above embodiment, the number of the lamps 30 may be adjusted according to the length of the switch 11 and the display unit 12. Further, when the number of lamps 30 is increased, a plurality of the convex portions 22 may be provided between the lamps 30.

また、前記実施形態では、導光体２０の表側面により表示部１２を形成した場合について示したが、表示部１２と導光体２０とを別体で構成してもよい。   Moreover, although the case where the display part 12 was formed by the front side surface of the light guide 20 was shown in the said embodiment, you may comprise the display part 12 and the light guide 20 by another body.

また、本照明装置１０は、前記スイッチ１１の照明に限られず、計器等の他の部品の照明にも適用可能である。   Moreover, this illuminating device 10 is not restricted to the illumination of the said switch 11, It is applicable also to illumination of other components, such as a meter.

本発明に係る照明装置を搭載した車載用オーディオの操作部の分解斜視図である。It is a disassembled perspective view of the operation part of the vehicle-mounted audio carrying the illuminating device which concerns on this invention. 図１に示す照明装置の上面図である。It is a top view of the illuminating device shown in FIG. 本発明に係る照明装置の参考例を示す上面図である。It is a top view which shows the reference example of the illuminating device which concerns on this invention. 本発明に係る照明装置の他の参考例を示す上面図である。It is a top view which shows the other reference example of the illuminating device which concerns on this invention.

符号の説明Explanation of symbols

１ 車載用オーディオの操作部
２ 基板
３ 操作パネル
１１ スイッチボタン
１０ 照明装置
１２ 表示部
２０ 導光体
２１ 本体部
２２ 凸部
２２ａ 凸部の外周面
３０ ランプ（光源）
５０ 照明手段 DESCRIPTION OF SYMBOLS 1 Operation part of vehicle-mounted audio | voice 2 Board | substrate 3 Operation panel 11 Switch button 10 Illuminating device 12 Display part 20 Light guide 21 Main body part 22 Convex part 22a Outer peripheral surface of convex part 30 Lamp (light source)
50 Illumination means

Claims (1)

車両のインストゥルメントパネル等に設けられて特定方向に延びる表示部と、当該表示部を照明するための照明手段とを備えた照明装置において、
前記照明手段は、
前記表示部と対向するように前記特定方向にそれぞれ所定の間隔をおいて並べられる複数の光源と、
前記複数の光源から発せられる照明光を前記表示部の裏面側に導く導光体とを有し、
当該導光体は、前記複数の光源と前記表示部との間に設けられて各光源から発せられる照明光を前記表示部に導く本体部と、当該本体部のうち互いに隣接する２つの光源の各中心部分とそれぞれ対向する部分を特定方向両端部として当該特定方向両端部からこれら２つの光源の略中間地点に向かって突出する凸部とを有し、
前記凸部の外周面は、連続する曲面であって、当該凸部の特定方向両端部と対向する位置に配置された２つの光源の一方の光源から他方の光源側に向けて互いに異なる方向に発せられて当該凸部の外周面の互いに異なる部分に入射した複数の光線と、他方の光源から一方の光源側に向けて互いに異なる方向に発せられて当該凸部の外周面の互いに異なる部分に入射した複数の光線とを、当該外周面でそれぞれ屈折させることで、これら複数の光線を前記表示部のうち前記２つの光源の略中間地点と対向する部分に集束させる形状を有し、
前記本体部は、前記凸部の特定方向両端部であって隣接する前記光源の各中心部分とそれぞれ対向する部分から前記凸部と離間する方向に延びる外側外周面を有し、
前記外側外周面は、当該外側外周面の互いに異なる部分に入射した複数の光線を、前記表示部のうち当該外側外周面と対向する部分の互いに異なる位置にそれぞれ導くように、前記表示部と略平行に延びる平板状を有し、
前記表示部は、前記導光体により導かれた前記照明光を裏面側に受けることにより表面側に発光することを特徴とする照明装置。
In a lighting device including a display unit provided in an instrument panel or the like of a vehicle and extending in a specific direction, and an illumination unit for illuminating the display unit,
The illumination means includes
A plurality of light sources arranged at predetermined intervals in the specific direction so as to face the display unit,
A light guide that guides illumination light emitted from the plurality of light sources to the back side of the display unit;
The light guide is provided between the plurality of light sources and the display unit and guides illumination light emitted from each light source to the display unit, and two adjacent light sources among the main body units . and a convex portion that gives impact toward a substantially middle point of the two light sources from the specific direction end portions of each central portion and a portion facing each as the specific direction end portions,
The outer peripheral surface of the convex portion is a continuous curved surface, and is in different directions from one light source to the other light source side of the two light sources arranged at positions facing both ends in the specific direction of the convex portion. A plurality of light beams emitted and incident on different portions of the outer peripheral surface of the convex portion, and emitted from different light sources toward the one light source side in different directions and different portions of the outer peripheral surface of the convex portion. A plurality of incident light rays are refracted on the outer peripheral surface, respectively, so that the plurality of light rays are focused on a portion of the display unit that faces a substantially middle point of the two light sources,
The main body has outer peripheral surfaces that extend in a direction away from the convex portion from portions that are opposite to each central portion of the light source adjacent to both ends in a specific direction of the convex portion ,
The outer peripheral surface is substantially the same as the display unit so as to guide a plurality of light beams incident on different parts of the outer peripheral surface to different positions of the display unit facing the outer outer peripheral surface. Having a flat plate shape extending in parallel,
The display unit emits light on the front surface side by receiving the illumination light guided by the light guide on the back surface side.
JP2006276734A 2006-10-10 2006-10-10 Lighting device Expired - Fee Related JP5063974B2 (en)

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JP2006276734A JP5063974B2 (en) 2006-10-10 2006-10-10 Lighting device
PCT/JP2007/067665 WO2008044415A1 (en) 2006-10-10 2007-09-11 Illumination device

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Publication number Priority date Publication date Assignee Title
JP4888524B2 (en) 2009-06-10 2012-02-29 ブラザー工業株式会社 Pushbutton switch device and sewing machine

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Publication number Priority date Publication date Assignee Title
JPS5872187A (en) * 1981-10-26 1983-04-30 松下電器産業株式会社 indicator device
CA1207902A (en) * 1982-09-27 1986-07-15 Nelson Friberg High speed optical sensor
JPS5960684U (en) * 1982-10-15 1984-04-20 オンキヨー株式会社 display device
JPH0314753Y2 (en) * 1985-05-08 1991-04-02
JPH06225081A (en) * 1993-01-28 1994-08-12 Canon Inc Document reading apparatus and information processing apparatus using the same
JP3181217B2 (en) * 1996-03-26 2001-07-03 スタンレー電気株式会社 LED light source backlight module
JP3505988B2 (en) * 1998-01-09 2004-03-15 オムロン株式会社 Surface light source device
JPH11284803A (en) * 1998-03-27 1999-10-15 Citizen Electronics Co Ltd Linear light source unit
JP2001135121A (en) * 1999-11-08 2001-05-18 Nidec Copal Corp Lighting device and light guide plate for the device
JP2004302021A (en) * 2003-03-31 2004-10-28 Kawaguchiko Seimitsu Co Ltd Backlight structure of liquid crystal display device

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WO2008044415A1 (en) 2008-04-17

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