WO2012105713A1 - Illumination device and electronic instrument using same - Google Patents

Illumination device and electronic instrument using same Download PDF

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Publication number
WO2012105713A1
WO2012105713A1 PCT/JP2012/052645 JP2012052645W WO2012105713A1 WO 2012105713 A1 WO2012105713 A1 WO 2012105713A1 JP 2012052645 W JP2012052645 W JP 2012052645W WO 2012105713 A1 WO2012105713 A1 WO 2012105713A1
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WO
WIPO (PCT)
Prior art keywords
light guide
light
light source
guide means
unit
Prior art date
Application number
PCT/JP2012/052645
Other languages
French (fr)
Japanese (ja)
Inventor
良 阿部
花野　雅昭
泰徳 金澤
健治 高田
明 永宗
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012105713A1 publication Critical patent/WO2012105713A1/en

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Classifications

    • 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F21V15/012—Housings with variable shape or dimensions, e.g. by means of elastically deformable materials or by movement of parts forming telescopic extensions of the housing body
    • 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
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
    • 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]
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources

Definitions

  • the present invention relates to a lighting device used as indoor lighting, and more particularly to a lighting device that includes a light source and a light guide plate, and that emits light from the light source through a light guide plate from a light emitting surface, and an electronic apparatus using the same. .
  • Patent Document 1 proposes an LED (Light Emitting Diode) surface light source device that secures a wide irradiation area by combining a bar-shaped light guide plate and a thin planar light guide plate.
  • FIG. 12 is a schematic diagram of the surface light source device disclosed in Patent Document 1. Light from the light source module 1201 is once incident on the end surface of the rod-shaped light guide plate 1202, and further, a planar light guide plate bonded from the side surface of the rod-shaped light guide plate 1202 with a transparent resin that is thinner than this. Light is incident on 1203 and light is extracted from the planar light guide plate 1203.
  • LED Light Emitting Diode
  • Patent Document 2 proposes a double-sided light emitting planar light source that can adjust the amount of light introduced into two light guide plates.
  • FIG. 13 is a schematic view of a double-sided light emitting surface light source disclosed in Patent Document 2.
  • the light quantity introduced into the light guide plates 1301 and 1302 is adjusted by one light source 1304 with respect to the two light guide plates 1301 and 1302 stacked with the reflection plate 1303 interposed therebetween, and double-sided light emission is performed.
  • Japanese Patent Publication Japanese Patent Laid-Open No. 11-232921 (published on August 27, 1999)” Japanese Patent Publication “Japanese Patent Laid-Open No. 2005-50630 (published on February 24, 2005)”
  • the two light guide plates 1301 and 1302 are fixed by being sandwiched between the casings 1305 at the ends, so that they are guided when the environmental temperature changes.
  • the members may be deformed due to the difference in thermal expansion coefficient between the light plate 1301, the light guide plate 1302, and the housing 1305, and distortion or misalignment with components during assembly may lead to a decrease in optical performance.
  • the present invention has been made in view of the above-described problems, and an object of the present invention is to realize an illumination device that can alleviate the influence of expansion of a member due to heat and suppress the bending of a light guide plate.
  • An illuminating device is an illuminating device having a light source, a light guide means for guiding light from the light source, and a base to which the light source is attached, and a positioning pin or a pin provided on the base
  • the receiving portion is engaged with a pin receiving portion or a positioning pin provided in the light guide means, and there is a gap for relaxing thermal expansion between the positioning pin and the pin receiving portion.
  • the lighting device is characterized in that the light source includes a plurality of light emitting sources. Moreover, the illuminating device according to the present invention is characterized in that the plurality of light emitting sources are configured by a combination of light emitting sources having different chromaticities.
  • the light guide means includes a first light guide means and a second light guide means for guiding light from the light source
  • the base is the first light guide means.
  • the light source is interposed between the second light guide means, and the light source includes a first light source that makes light incident on an incident surface of the first light guide means, and a first light source that makes light incident on an incident surface of the second light guide means. It is characterized by comprising two light sources.
  • the lighting device according to the present invention includes a positioning pin or pin receiving portion provided on both surfaces of the base and a pin receiving portion or positioning pin provided in each of the first light guide means and the second light guide means.
  • the outer peripheral portions of the first light guide means and the second light guide means are fixed by an outer frame.
  • the lighting device according to the present invention is characterized in that a coefficient of thermal expansion of the outer frame is substantially the same as a coefficient of thermal expansion of the first light guide unit and the second light guide unit.
  • a part of the light guide unit and the light source are covered with a cover, and an outer peripheral portion of the cover is in contact with the light guide unit.
  • the illuminating device according to the present invention further includes a diffusing unit on the exit surface side of the light guiding unit.
  • an electronic apparatus is characterized by including any one of the illumination devices described above.
  • an illuminating device that can alleviate the influence of expansion of members due to heat and suppress the bending of the light guide plate.
  • FIG. 1 is an exploded view of a double-sided light emitting illumination device according to Embodiment 1.
  • FIG. It is a detailed view about the light source installed in the base which concerns on Embodiment 1.
  • FIG. It is the figure demonstrated regarding the positioning of the 1st light guide means with respect to the base which concerns on Embodiment 1, and a 2nd light guide means. It is sectional drawing of the double-sided light-emitting illuminating device which concerns on Embodiment 1.
  • FIG. 1 is an exploded view of a double-sided light emitting illumination device according to Embodiment 1.
  • FIG. It is a detailed view about the light source installed in the base which concerns on Embodiment 1.
  • FIG. It is the figure demonstrated regarding the positioning of the 1st light guide means with respect to the base which concerns on Embodiment 1, and a 2nd light guide means.
  • FIG. 1 It is a block diagram of the 1st light source which concerns on Embodiment 1, and a 2nd light source. It is the figure explaining the fixing method in the outer peripheral part of the 1st light guide means which concerns on Embodiment 1, and a 2nd light guide means. It is the figure (a) which looked at the double-sided light-emitting illuminating device which concerns on Embodiment 2 from the 1st spreading
  • FIG. 1A is a diagram viewed from the first light guide unit 11 side of the illumination device 100
  • FIG. 1B is a diagram viewed from the second light guide unit 12 side of the illumination device 100
  • FIG. 2 is an exploded view of the lighting device 100
  • FIG. 3 is an enlarged view of the base portion.
  • the cover 7 is omitted to illustrate the light source 4.
  • the illuminating device 100 in this embodiment includes a first light guide means 11, a second light guide means 12, a base 3 interposed between the two light guide means, and a base 3 as shown in FIG.
  • a light source 4 that is installed and makes light incident on the first light guide means 11 and the second light guide means 12, a reflection means 5 interposed between the two light guide means and the base 3, and the two light guides.
  • a coupling portion reflecting means 6 disposed in the vicinity of the coupling portion between the means and the light source 4, a cover 7 covering the coupling portion between the two light guiding means and the light source 4, the first light guiding means 11, and the second light guiding means.
  • the outer frame 10 covers the entire circumference of the twelve.
  • FIG. 4 is a diagram illustrating the positioning means of the first light guide means 11 and the second light guide means 12 with respect to the base 3.
  • the first light guide unit 11 and the second light guide unit 12 are positioned with respect to the base 3 by positioning pins 8 provided on the base 3 and pin receivers provided on the first light guide unit 11 and the second light guide unit 12. This is done by engaging the part 9. Since the light source 4 is attached to the base 3 as described above, the light source 4, the first light guide means 11, and the second light guide are engaged by engaging the positioning pin 8 and the pin receiving portion 9. Positioning with the means 12 can be performed accurately and easily.
  • the positioning pins 8 are provided so as to protrude from both the upper and lower surfaces of the base 3 at positions surrounded by a circle in the lower right diagram of FIG. 4, and the shape of the pin receiving portion 9 provided in the first light guide means 11 is The U-shape follows the radial direction of the light guide means. In a state where the positioning pin 8 and the pin receiving portion 9 are engaged, there is a gap W between the positioning pin 8 and the pin receiving portion 9. This is to prevent the member from being distorted or bent in response to heat from the light source 4 or expansion or contraction of the member due to a change in environmental temperature when the lighting device is used.
  • the number and power of the light sources 4 are often large, and there is a high possibility that the lighting device will be affected by heat.
  • the shape of the pin receiving portion 9 slightly larger than the outer periphery of the positioning pin 8 and providing the gap W, it is possible to suppress the influence on the lighting device due to the expansion and contraction of the member accompanying the temperature change.
  • the size, shape, position, and number of the positioning pins 8 and the pin receiving portions 9 may be set as appropriate according to the specifications of the lighting device 100.
  • the numbers are as shown in the lower right diagram of FIG. It is desirable that four are provided at equal intervals on one side. By providing in this way, the light guiding means and the base are less likely to be displaced in the left, right, and upper and lower directions when viewed from above.
  • the positioning pin 8, the first light guide means 11, and the second light guide means 12 are provided on the base 3, but the pin receiver 9 and the first light guide means are provided on the base 3. 11.
  • Positioning pins 8 may be provided on the second light guide means 12.
  • FIG. 5 is a cross-sectional view of the illumination device 100 according to the present embodiment, where the light source 4 is coupled to the first light guide unit 11 and the second light guide unit 12, and the incident surface of each light guide unit. It is a figure explaining the output surface.
  • the first light guide means 11 is mainly made of acrylic resin, and has an incident surface 111 and an output surface 112, and the incident surface 111 and the output surface 112 are in a substantially vertical positional relationship.
  • the second light guiding means 12 is also mainly made of acrylic resin, and has an incident surface 121 and an output surface 122, and the positional relationship between the incident surface 121 and the output surface 122 is substantially vertical.
  • the light source 4 includes a first light source 41 that makes light incident on the first light guide unit 11 and a second light source 42 that makes light incident on the second light guide unit 2.
  • the 1st light source 41 and the 2nd light source 42 are arrange
  • each of the first light source 41 and the second light source 42 includes a plurality of LEDs.
  • the first light source 41 is controlled by the first light source control unit 410
  • the second light source 42 is controlled by the second light source control unit 420.
  • the light source 4 is configured by the first light source 41 for the first light guide unit 11 and the second light source 42 for the second light guide unit 12, thereby the first light source 41 and the second light source 42. It is possible to individually adjust the light output, and as a result, it is possible to adjust the amount of light extracted from the exit surface 112 and the exit surface 122.
  • Each of the first light guide unit 11 and the second light guide unit 12 has a light emission surface 112, a counter surface 113 facing the light output surface 122, and a counter surface 123 having diffusion patterns such as diffusion printing, prisms, and microlenses (not shown). It has been subjected. These diffusion patterns serve to extract the outgoing light from the first light source 41 and the second light source 42 incident from the incident surface 111 and the incident surface 121 to the exit surface 112 and the exit surface 122 side.
  • diffusion patterns serve to extract the outgoing light from the first light source 41 and the second light source 42 incident from the incident surface 111 and the incident surface 121 to the exit surface 112 and the exit surface 122 side.
  • the reflecting means 5 is disposed between the first light guide means 11 and the base 3 and between the second light guide means 12 and the base 3.
  • the reflection means 5 reflects light emitted from the facing surface 113 and the facing surface 123 facing the exit surface of each light guide means, and takes out the light from the exit surface 112 and the exit surface 122 again, thereby making more effective use of the light. Used for.
  • a coupling portion reflecting member 6 is provided in the vicinity of the coupling portion between the light source 4, the first light guide unit 11, and the second light guide unit 12. Since the light emitted from the light source 4 has a spread, some light having a large radiation angle is not incident on the respective incident surfaces of the first light guide unit 11 and the second light guide unit 12. Therefore, the coupling portion reflecting member 6 is arranged so that light that is off the incident surface can be guided to the incident surface again by reflection and the light use efficiency from the light source 4 can be improved.
  • FIG. 6 is a diagram showing the configuration of the first light source 41 and the second light source 42 in detail.
  • a plurality of white LEDs 43 and a plurality of light bulb color LEDs 44 are mixed.
  • the white LED 43 needs to be lit.
  • the white LED 43 and the light bulb color LED 44 by turning on the white LED 43 and the light bulb color LED 44 at the same time and adjusting the ratio of the amount of light of each color, it is possible to change the color tone of the light extracted from the emission surface 112 and the emission surface 122.
  • first light source 41 and the second light source 42 can be controlled independently by the first light source control means 410 and the second light source control means 420, the light extracted from the emission surface 112 and the emission surface 122 is independent. It is possible to control the color tone.
  • white and bulb-color LED light sources are used as the configuration of the light source for color tone control.
  • the type, color, and arrangement of the light sources to be used are not limited to this, and depending on the purpose. The type, color, arrangement, and number may be determined as appropriate.
  • the cover 7 is basically preferably lightweight, and may be determined in consideration of design and the like. Moreover, since the outer peripheral part of the upper and lower covers 7 fixes the first light guide means 11 and the second light guide means 12, the vertical positions of the first light guide means 11 and the second light guide means 12 respectively. And is effective in suppressing the bending of the light guide means generated in the direction of gravity.
  • the upper and lower covers 7 are aligned and combined with the concave and convex portions inside the base 3 shown in FIG.
  • FIG. 7 is a diagram for explaining a fixing method in the outer peripheral portion of the first light guide unit 11 and the second light guide unit 12.
  • the outer peripheral portions of the first light guide unit 11 and the second light guide unit 12 are fixed by the outer frame 10 and are integrated.
  • any method may be used as long as it can be firmly bonded and fixed, for example, an adhesive or welding.
  • the material used for the outer frame 10 is a material that can withstand thermal expansion, and preferably has a thermal expansion coefficient that is the same as or close to that of the light guide means. Specifically, for example, acrylic resin, polycarbonate, ABS resin, aluminum or the like is used.
  • each light guide means does not come off the base 3 in any posture.
  • each light guide means does not need to be directly fixed to the base 3 by screwing or bonding.
  • the light guide means and the base 3 are directly fixed by screwing, bonding, or the like, when the environmental temperature changes, or when heat is generated due to the lighting of the light source 4, each light guide means from the difference in thermal expansion coefficient of each member.
  • the first light guide unit 11 and the second light guide unit 12 are not completely fixed to the base 3 using an adhesive or the like. It is possible to prevent member distortion caused by the difference in rate.
  • the outer frame 10 is fixed so as to cover the entire circumference of the first light guide unit 11 and the second light guide unit 12, the outer frame 10 faces the opposing surface 113 and the opposing surface 123 side of the light guide unit. It is possible to prevent dust and dust from entering and prevent deterioration of optical characteristics.
  • the thermal expansion coefficient of the outer frame 10 is substantially the same as that of the first light guide means 11 and the second light guide means 12.
  • the members are bonded and fixed when the environmental temperature changes.
  • the illumination device 100 is suspended by a wire.
  • the LED power source installed on the ceiling and the light source 4 are connected by wiring.
  • the hanging method a wire is hung from the LED power source installed on the ceiling, and the lighting apparatus 100 is suspended.
  • the tip of the wire is connected to a hanging fitting provided on the base 3 or cover 7 of the lighting fixture.
  • the suspension wire and the wiring may be used together, or the wiring connecting the power source and the light source may be separately provided. In this case, only one wiring is sufficient.
  • FIGS. 2 An illumination device 200 according to Embodiment 2 of the present invention will be described with reference to FIGS.
  • the present embodiment is different from the first embodiment in that the lighting device 200 includes the first diffusing unit 81 and the second diffusing unit 82.
  • 8A is a diagram viewed from the first light guide unit 11 side of the illumination device 200
  • FIG. 8B is a diagram viewed from the second light guide unit 12 side of the illumination device 200.
  • FIG. FIG. 9 is an exploded view of the lighting device 200.
  • the illuminating device 200 of Embodiment 2 has the same configuration as the illuminating device 100 of the first embodiment except for the first diffusing unit 81 and the second diffusing unit 82, and the same reference numerals denote the same components. Is attached.
  • various technically preferable limitations for carrying out the present invention are given, but the scope of the present invention is not limited to the following embodiments and drawings.
  • the illuminating device 200 has light incident on the first light guide means 11, the second light guide means 12, the base 3 interposed between the two light guide means, and the two light guide means.
  • First diffusing means 81 and second diffusing means 82 disposed on the exit surface side of each of the two light guiding means, a cover 7 covering the coupling portion between the two light guiding means and the light source 4, and the first light guiding means 11 and an outer frame 10 that covers the entire circumference of the second light guiding means 12.
  • FIG. 10 is a cross-sectional view of the lighting device 200 according to the present embodiment.
  • the first diffusion means 81 is disposed on the emission surface 112 side of the first light guide means 11, and the second diffusion means 82 is disposed on the emission surface 122 side of the second light guide means 12.
  • the light extracted from the emission surface 112 and the emission surface 122 of the first light guide unit 11 and the second light guide unit 12 is incident on the first diffusion unit 81 and the second diffusion unit 82, respectively.
  • the light reaching each diffusion means is diffused by passing through the diffusion means 81 and 82, and the illuminance distribution of illumination is made uniform.
  • the vicinity of the coupling portion between the light source 4 and each light guide means is covered by being sandwiched between the upper and lower covers 7, the first diffusing means 81, and the second diffusing means 82.
  • the outer periphery of the cover 7 is fixed to the first diffusion means 81 and the second diffusion means 82, respectively.
  • the first light guide unit 11, the second light guide unit 12, the base 3, the light source 4, the reflection unit 5, and the coupling unit reflection unit 6 include the first diffusion unit 81, the second diffusion unit 82, and the upper and lower sides. Therefore, it is possible to prevent dust and dust from entering.
  • the first diffusing unit 81 and the second diffusing unit 82 bend the light guiding unit generated in the gravity direction by regulating the positions of the first light guiding unit 11 and the second light guiding unit 12 in the Z direction. There is an effect to suppress.
  • FIG. 11 is a diagram illustrating a fixing method in the outer peripheral portion of the first light guide unit 11 and the second light guide unit 12.
  • the outer peripheral portions of the first light guide unit 11 and the second light guide unit 12 are fixed by the outer frame 10 and are integrated. Further, the first diffusing unit 81 and the second diffusing unit 82 are also fixed to the outer frame 10 and integrated.
  • any method may be used as long as it is a method capable of firmly bonding and fixing, such as an adhesive or welding.
  • each light guide means and each diffusion means are It will not come off the base 3 in any posture. Since the outer frame 10 is fixed so as to cover the entire circumference of the first light guide means 11 and the second light guide means 12, dust or dust from the outer peripheral portion to the opposing surface 113 and the opposing surface 123 side of the light guide means It is possible to prevent dust from entering and prevent deterioration of optical characteristics.
  • the outer peripheral portions of the diffusing means 81 and the diffusing means 82 are also substantially hermetically fixed to the outer frame 10, dust and dust intrusion from the outer peripheral portions to the exit surface 112 and the exit surface 122 side of the light guide means is prevented. It is possible to prevent the deterioration of optical characteristics.
  • the lighting device of the present invention by mounting the lighting device of the present invention on an electronic device such as a lighting device, a device capable of irradiating a necessary portion with a necessary light amount can be realized.
  • the first light source 41 and the second light source 42 are LEDs.
  • the present invention is not limited to this, and any light source capable of coupling light to the light guide means, such as an organic EL, is realized. Is possible.
  • the double-sided lighting device has been described.
  • the present invention is not limited to this, and is effective in all lighting devices using a light guide plate.
  • the lighting device of the present invention can be used for lighting devices and electronic devices such as backlights of liquid crystal display elements.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

An illumination device having a light source, a light-guidance means for guiding light from the light source, and a base to which the light source is attached, the illumination device characterized in having a gap for allowing a positioning pin or pin-receiving unit provided to the base, and a pin-receiving unit or positioning pin provided to the light-guidance means to engage with each other, the gap also being designed to alleviate heat expansion between the positioning pin and the pin-receiving section. Provided thereby is an illumination device in which the effect of heat-induced expansion of members can be alleviated and bending of the light-guidance plate can be suppressed.

Description

照明装置、及びこれを用いた電子機器LIGHTING DEVICE AND ELECTRONIC DEVICE USING THE SAME
　本発明は、室内照明として使用される照明装置に関し、更に詳しくは、光源と導光板からなり、前記光源からの光が導光板を通して発光面から出射する照明装置、及びこれを用いた電子機器に関する。 The present invention relates to a lighting device used as indoor lighting, and more particularly to a lighting device that includes a light source and a light guide plate, and that emits light from the light source through a light guide plate from a light emitting surface, and an electronic apparatus using the same. .
　近年、導光板を利用した薄型の照明装置が種々提案されている。特許文献１には、棒状の導光板と、薄い面状の導光板を組み合わせて広い照射エリアを確保するＬＥＤ（Ｌｉｇｈｔ　Ｅｍｉｔｔｉｎｇ　Ｄｉｏｄｅ）面光源装置が提案されている。図１２は、特許文献１に示された面光源装置の概略図である。光源モジュール１２０１からの光を一旦、棒状の導光板１２０２の端面から入射させ、さらに、この棒状の導光板１２０２の側面から、これよりも厚みの薄く透明な樹脂で接着された面状の導光板１２０３に光を入射し、この面状の導光板１２０３から光を取り出す。このような構成にすることで、面状の導光板１２０３が薄く大きいサイズになっても光源モジュール１２０１そのものが必要な光量を確保するために大きくなることは無い。また、特許文献２には、２枚の導光板への導入光量が調整可能な両面発光面状光源が提案されている。図１３は特許文献２に示された両面発光面状光源の概略図である。反射板１３０３を挟んで積層された２枚の導光板１３０１、１３０２に対して一つの光源１３０４で導光板１３０１、１３０２への導入光量を調整し、両面発光を行っている。 In recent years, various thin lighting devices using a light guide plate have been proposed. Patent Document 1 proposes an LED (Light Emitting Diode) surface light source device that secures a wide irradiation area by combining a bar-shaped light guide plate and a thin planar light guide plate. FIG. 12 is a schematic diagram of the surface light source device disclosed in Patent Document 1. Light from the light source module 1201 is once incident on the end surface of the rod-shaped light guide plate 1202, and further, a planar light guide plate bonded from the side surface of the rod-shaped light guide plate 1202 with a transparent resin that is thinner than this. Light is incident on 1203 and light is extracted from the planar light guide plate 1203. By adopting such a configuration, even if the planar light guide plate 1203 is thin and large, the light source module 1201 itself does not become large in order to secure a necessary amount of light. Patent Document 2 proposes a double-sided light emitting planar light source that can adjust the amount of light introduced into two light guide plates. FIG. 13 is a schematic view of a double-sided light emitting surface light source disclosed in Patent Document 2. The light quantity introduced into the light guide plates 1301 and 1302 is adjusted by one light source 1304 with respect to the two light guide plates 1301 and 1302 stacked with the reflection plate 1303 interposed therebetween, and double-sided light emission is performed.
日本国公開特許公報「特開平１１－２３２９２１号公報（平成１１年８月２７日公開）」Japanese Patent Publication “Japanese Patent Laid-Open No. 11-232921 (published on August 27, 1999)” 日本国公開特許公報「特開２００５－５０６３０号公報（平成１７年２月２４日公開）」Japanese Patent Publication “Japanese Patent Laid-Open No. 2005-50630 (published on February 24, 2005)”
　しかしながら、特許文献１に示された面光源装置では、光源モジュール１２０１からの光は、まず、棒状の導光板１２０２に入り、その後、面状の導光板１２０３に入射するため、光源モジュール１２０１からの熱により、導光板１２０２が変形しやすい。導光板１２０２と導光板１２０３が一体成型されている場合、これら導光板の熱膨張率は同じであるが、光源モジュール１２０１からの熱の伝わり方に違いがあるため、吸収する熱量に違いが生じ、２つの導光板の線膨張が異なり、ひずみが生じる。また、導光板１２０２と導光板１２０３を別々に成型し組み立てた場合も、光源モジュール１２０１から伝わる熱量に違いがあるため、これら導光板の膨張に差が生じ、ずれやひずみが生じる可能性がある。また、特許文献２に示された両面発光面状光源は、２枚の導光板１３０１、１３０２は端部で筐体１３０５に挟まれて固定されているため、環境温度が変化した際に、導光板１３０１、導光板１３０２と筐体１３０５の熱膨張率の違いにより部材が変形し、組み立ての際の部品とのひずみや位置ずれが光学性能の低下に繋がる可能性がある。 However, in the surface light source device disclosed in Patent Document 1, light from the light source module 1201 first enters the rod-shaped light guide plate 1202 and then enters the planar light guide plate 1203. The light guide plate 1202 is easily deformed by heat. In the case where the light guide plate 1202 and the light guide plate 1203 are integrally molded, the thermal expansion coefficients of these light guide plates are the same, but there is a difference in how heat is transmitted from the light source module 1201, so a difference occurs in the amount of heat absorbed. The linear expansion of the two light guide plates is different and distortion occurs. In addition, even when the light guide plate 1202 and the light guide plate 1203 are separately molded and assembled, there is a difference in the amount of heat transmitted from the light source module 1201, which may cause a difference in expansion of these light guide plates, resulting in deviation or distortion. . In the double-sided light emitting planar light source disclosed in Patent Document 2, the two light guide plates 1301 and 1302 are fixed by being sandwiched between the casings 1305 at the ends, so that they are guided when the environmental temperature changes. The members may be deformed due to the difference in thermal expansion coefficient between the light plate 1301, the light guide plate 1302, and the housing 1305, and distortion or misalignment with components during assembly may lead to a decrease in optical performance.
　本発明は、上記の課題を鑑みてなされたものであり、熱による部材の膨張の影響を緩和し、導光板の撓みを押さえることが可能な照明装置を実現することを目的とする。 The present invention has been made in view of the above-described problems, and an object of the present invention is to realize an illumination device that can alleviate the influence of expansion of a member due to heat and suppress the bending of a light guide plate.
　本発明に係る照明装置は、光源と、前記光源からの光を導光する導光手段と、前記光源が取り付けられるベースとを有する照明装置であって、前記ベースに設けられた位置決めピンまたはピン受け部と、前記導光手段に設けられたピン受け部または位置決めピンとが係合し、前記位置決めピンと前記ピン受け部の間には、熱膨張を緩和するための空隙を有することを特徴とする。 An illuminating device according to the present invention is an illuminating device having a light source, a light guide means for guiding light from the light source, and a base to which the light source is attached, and a positioning pin or a pin provided on the base The receiving portion is engaged with a pin receiving portion or a positioning pin provided in the light guide means, and there is a gap for relaxing thermal expansion between the positioning pin and the pin receiving portion. .
　また、本発明に係る照明装置は、前記光源は、複数の発光源により構成されていることを特徴とする。また、本発明に係る照明装置は、前記複数の発光源は、色度の異なる発光源の組み合わせにより構成されていることを特徴とする。 The lighting device according to the present invention is characterized in that the light source includes a plurality of light emitting sources. Moreover, the illuminating device according to the present invention is characterized in that the plurality of light emitting sources are configured by a combination of light emitting sources having different chromaticities.
　また、本発明に係る照明装置は、前記導光手段は、前記光源からの光を導光する第１導光手段、第２導光手段とからなり、前記ベースは、前記第１導光手段、第２導光手段の間に介在し、前記光源は、前記第１導光手段の入射面に光を入射する第１光源と、前記第２導光手段の入射面に光を入射する第２光源により構成されていることを特徴とする。また、本発明に係る照明装置は、前記ベース両面に設けられた位置決めピンまたはピン受け部と、前記第１導光手段、第２導光手段にそれぞれ設けられたピン受け部または位置決めピンとが係合し、かつ、前記第１導光手段、第２導光手段の外周部は、外枠により固定されていることを特徴とする。 In the illumination device according to the present invention, the light guide means includes a first light guide means and a second light guide means for guiding light from the light source, and the base is the first light guide means. The light source is interposed between the second light guide means, and the light source includes a first light source that makes light incident on an incident surface of the first light guide means, and a first light source that makes light incident on an incident surface of the second light guide means. It is characterized by comprising two light sources. The lighting device according to the present invention includes a positioning pin or pin receiving portion provided on both surfaces of the base and a pin receiving portion or positioning pin provided in each of the first light guide means and the second light guide means. In addition, the outer peripheral portions of the first light guide means and the second light guide means are fixed by an outer frame.
　また、本発明に係る照明装置は、前記外枠の熱膨張率は、前記第１導光手段、第２導光手段の熱膨張率と略同一であることを特徴とする。また、本発明に係る照明装置は、前記導光手段の一部と前記光源は、カバーにより覆われ、前記カバーの外周部は、前記導光手段に接触していることを特徴とする。また、本発明に係る照明装置は、前記導光手段の出射面側に拡散手段をさらに有することを特徴とする。 The lighting device according to the present invention is characterized in that a coefficient of thermal expansion of the outer frame is substantially the same as a coefficient of thermal expansion of the first light guide unit and the second light guide unit. In the illumination device according to the present invention, a part of the light guide unit and the light source are covered with a cover, and an outer peripheral portion of the cover is in contact with the light guide unit. Moreover, the illuminating device according to the present invention further includes a diffusing unit on the exit surface side of the light guiding unit.
　また、本発明に係る電子機器は、上記のいずれかに記載の照明装置を備えたことを特徴とする。 Further, an electronic apparatus according to the present invention is characterized by including any one of the illumination devices described above.
　本発明の他の目的、特徴、および優れた点は、以下に示す記載によって十分分かるであろう。また、本発明の利点は、添付図面を参照した次の説明で明白になるであろう。 Other objects, features, and superior points of the present invention will be fully understood from the following description. The advantages of the present invention will become apparent from the following description with reference to the accompanying drawings.
　本発明によれば、熱による部材の膨張の影響を緩和し、導光板の撓みを押さえることが可能な照明装置を実現することができる。 According to the present invention, it is possible to realize an illuminating device that can alleviate the influence of expansion of members due to heat and suppress the bending of the light guide plate.
実施形態１に係る両面発光照明装置を第１導光手段側から見た図（ａ）、および第２導光手段側から見た図（ｂ）である。It is the figure (a) which looked at the double-sided light-emitting illuminating device which concerns on Embodiment 1 from the 1st light guide means side, and the figure (b) seen from the 2nd light guide means side. 実施形態１に係る両面発光照明装置の分解図である。1 is an exploded view of a double-sided light emitting illumination device according to Embodiment 1. FIG. 実施形態１に係るベースに設置された光源についての詳細図である。It is a detailed view about the light source installed in the base which concerns on Embodiment 1. FIG. 実施形態１に係るベースに対する第１導光手段、第２導光手段の位置決めに関して説明した図である。It is the figure demonstrated regarding the positioning of the 1st light guide means with respect to the base which concerns on Embodiment 1, and a 2nd light guide means. 実施形態１に係る両面発光照明装置の断面図である。It is sectional drawing of the double-sided light-emitting illuminating device which concerns on Embodiment 1. FIG. 実施形態１に係る第１光源、第２光源の構成図である。It is a block diagram of the 1st light source which concerns on Embodiment 1, and a 2nd light source. 実施形態１に係る第１導光手段、第２導光手段の外周部における固定方法について説明した図である。It is the figure explaining the fixing method in the outer peripheral part of the 1st light guide means which concerns on Embodiment 1, and a 2nd light guide means. 実施形態２に係る両面発光照明装置を第１拡散手段側から見た図（ａ）、および第２拡散手段側から見た図（ｂ）である。It is the figure (a) which looked at the double-sided light-emitting illuminating device which concerns on Embodiment 2 from the 1st spreading | diffusion means side, and the figure (b) seen from the 2nd spreading | diffusion means side. 実施形態２に係る両面発光照明装置の分解図である。It is an exploded view of the double-sided light emitting illumination device according to the second embodiment. 実施形態２に係る両面発光照明装置の断面図である。It is sectional drawing of the double-sided light-emitting illuminating device which concerns on Embodiment 2. FIG. 実施形態２に係る第１導光手段、第２導光手段の外周部における固定方法について説明した図である。It is the figure explaining the fixing method in the outer peripheral part of the 1st light guide means which concerns on Embodiment 2, and a 2nd light guide means. 従来の面光源装置の断面図である。It is sectional drawing of the conventional surface light source device. 従来の両面発光面状光源の断面図である。It is sectional drawing of the conventional double-sided light emission planar light source.
　＜実施形態１＞
　以下、本発明の実施形態１に係る照明装置１００について、図１～図７に基づいて説明する。なお、本発明の図面において、同一の参照符号は、同一部分または相当部分を表わすものとする。 <Embodiment 1>
Hereinafter, an illumination device 100 according to Embodiment 1 of the present invention will be described with reference to FIGS. In the drawings of the present invention, the same reference numerals represent the same or corresponding parts.
　図１（ａ）は照明装置１００の第１導光手段１１側から見た図であり、図１（ｂ）は照明装置１００の第２導光手段１２側から見た図である。また、図２は照明装置１００の分解図、図３は、ベース部分の拡大図である。なお、図１では、光源４を図示するために、カバー７を省略している。 FIG. 1A is a diagram viewed from the first light guide unit 11 side of the illumination device 100, and FIG. 1B is a diagram viewed from the second light guide unit 12 side of the illumination device 100. FIG. 2 is an exploded view of the lighting device 100, and FIG. 3 is an enlarged view of the base portion. In FIG. 1, the cover 7 is omitted to illustrate the light source 4.
　（照明装置の構成）
　本実施形態における照明装置１００は、第１導光手段１１と、第２導光手段１２と、上記２つの導光手段の間に介在するベース３と、図３に示すように、ベース３に設置され、上記第１導光手段１１、第２導光手段１２に光を入射する光源４と、上記２つの導光手段とベース３の間に介在する反射手段５と、上記２つの導光手段と光源４の結合部付近に配置された結合部反射手段６と、上記２つの導光手段と光源４の結合部を覆うカバー７と、上記第１導光手段１１、第２導光手段１２の全周を覆う外枠１０から構成されている。 (Configuration of lighting device)
The illuminating device 100 in this embodiment includes a first light guide means 11, a second light guide means 12, a base 3 interposed between the two light guide means, and a base 3 as shown in FIG. A light source 4 that is installed and makes light incident on the first light guide means 11 and the second light guide means 12, a reflection means 5 interposed between the two light guide means and the base 3, and the two light guides. A coupling portion reflecting means 6 disposed in the vicinity of the coupling portion between the means and the light source 4, a cover 7 covering the coupling portion between the two light guiding means and the light source 4, the first light guiding means 11, and the second light guiding means. The outer frame 10 covers the entire circumference of the twelve.
　（導光手段の位置決め）
　図４は、ベース３に対する第１導光手段１１、第２導光手段１２の位置決め手段に関して説明した図である。ベース３に対する第１導光手段１１、第２導光手段１２の位置決めは、ベース３に設けられた位置決めピン８と、第１導光手段１１、第２導光手段１２に設けられたピン受け部９を係合することで行われている。ベース３には上記で説明したように、光源４が取り付けられているため、位置決めピン８とピン受け部９とを係合することで、光源４と第１導光手段１１、第２導光手段１２との位置合わせを正確かつ容易に行うことが可能となる。 (Positioning of light guide means)
FIG. 4 is a diagram illustrating the positioning means of the first light guide means 11 and the second light guide means 12 with respect to the base 3. The first light guide unit 11 and the second light guide unit 12 are positioned with respect to the base 3 by positioning pins 8 provided on the base 3 and pin receivers provided on the first light guide unit 11 and the second light guide unit 12. This is done by engaging the part 9. Since the light source 4 is attached to the base 3 as described above, the light source 4, the first light guide means 11, and the second light guide are engaged by engaging the positioning pin 8 and the pin receiving portion 9. Positioning with the means 12 can be performed accurately and easily.
　ここでは、第１導光手段１１を例に説明するが、第２導光手段１２についても同様である。位置決めピン８は、図４右下図の円で囲まれた位置に、ベース３の上下両面に突出して設けられており、また、第１導光手段１１に設けられたピン受け部９の形状は、導光手段の径方向に倣ったＵ字形状となっている。位置決めピン８とピン受け部９とを係合させた状態において、位置決めピン８とピン受け部９の間は空隙Ｗを有している。これは、照明装置使用時に、光源４からの熱や、環境温度の変化による部材の膨張や収縮に対応し、部材の歪みや撓みの発生を防止するためである。特に本実施形態のように両面発光する照明装置では、光源４の数やパワーが大きいことが多く、照明装置に熱の影響が出る可能性が高い。ピン受け部９の形状を位置決めピン８の外周よりもやや大きめにして、空隙Ｗを持たせることにより、温度変化に伴いう部材の膨張、収縮による照明装置への影響を抑えることができる。 Here, the first light guide unit 11 will be described as an example, but the same applies to the second light guide unit 12. The positioning pins 8 are provided so as to protrude from both the upper and lower surfaces of the base 3 at positions surrounded by a circle in the lower right diagram of FIG. 4, and the shape of the pin receiving portion 9 provided in the first light guide means 11 is The U-shape follows the radial direction of the light guide means. In a state where the positioning pin 8 and the pin receiving portion 9 are engaged, there is a gap W between the positioning pin 8 and the pin receiving portion 9. This is to prevent the member from being distorted or bent in response to heat from the light source 4 or expansion or contraction of the member due to a change in environmental temperature when the lighting device is used. In particular, in a lighting device that emits light on both sides as in this embodiment, the number and power of the light sources 4 are often large, and there is a high possibility that the lighting device will be affected by heat. By making the shape of the pin receiving portion 9 slightly larger than the outer periphery of the positioning pin 8 and providing the gap W, it is possible to suppress the influence on the lighting device due to the expansion and contraction of the member accompanying the temperature change.
　なお、位置決めピン８とピン受け部９の大きさ、形状、位置、個数については、照明装置１００の仕様により適宜設定されればよいが、特に個数については、図４の右下図に示したように片面について等間隔に４個設けられることが望ましい。このように設けることで、上面から見て左右、上下いずれにも導光手段とベースがずれることが少ない。さらに、今実施形態では、ベース３に位置決めピン８、第１導光手段１１、第２導光手段１２にピン受け部９を設けたが、ベース３にピン受け部９、第１導光手段１１、第２導光手段１２に位置決めピン８を設けても構わない。 Note that the size, shape, position, and number of the positioning pins 8 and the pin receiving portions 9 may be set as appropriate according to the specifications of the lighting device 100. In particular, the numbers are as shown in the lower right diagram of FIG. It is desirable that four are provided at equal intervals on one side. By providing in this way, the light guiding means and the base are less likely to be displaced in the left, right, and upper and lower directions when viewed from above. Further, in the present embodiment, the positioning pin 8, the first light guide means 11, and the second light guide means 12 are provided on the base 3, but the pin receiver 9 and the first light guide means are provided on the base 3. 11. Positioning pins 8 may be provided on the second light guide means 12.
　（光源と導光手段の関係）
　図５は、本実施形態に係る照明装置１００の断面図であり、光源４と第１導光手段１１、及び第２導光手段１２との結合部および、それぞれの導光手段の入射面、出射面について説明した図である。 (Relation between light source and light guide)
FIG. 5 is a cross-sectional view of the illumination device 100 according to the present embodiment, where the light source 4 is coupled to the first light guide unit 11 and the second light guide unit 12, and the incident surface of each light guide unit. It is a figure explaining the output surface.
　第１導光手段１１は、主にアクリル樹脂から成り、入射面１１１と、出射面１１２を有しており、入射面１１１と出射面１１２は略垂直な位置関係となっている。同様に、第２導光手段１２も主にアクリル樹脂から成り、入射面１２１と、出射面１２２を有しており、入射面１２１と出射面１２２との位置関係は略垂直である。 The first light guide means 11 is mainly made of acrylic resin, and has an incident surface 111 and an output surface 112, and the incident surface 111 and the output surface 112 are in a substantially vertical positional relationship. Similarly, the second light guiding means 12 is also mainly made of acrylic resin, and has an incident surface 121 and an output surface 122, and the positional relationship between the incident surface 121 and the output surface 122 is substantially vertical.
　光源４は、第１導光手段１１に対して光を入射する第１光源４１と、第２導光手段２に対して光を入射する第２光源４２から構成されている。第１光源４１と第２光源４２はそれぞれ入射面１１１と入射面１２１に対向して配置されている。本実施形態において、第１光源４１と第２光源４２はそれぞれ複数のＬＥＤから構成されている。第１光源４１は第１光源制御手段４１０によって制御され、第２光源４２は第２光源制御手段４２０によって制御される。このように、光源４を、第１導光手段１１用の第１光源４１と、第２導光手段１２用の第２光源４２とで構成することにより、第１光源４１、第２光源４２の光出力を個別で調整することが可能となり、その結果、出射面１１２、出射面１２２からの取り出し光の光量調整が可能となっている。 The light source 4 includes a first light source 41 that makes light incident on the first light guide unit 11 and a second light source 42 that makes light incident on the second light guide unit 2. The 1st light source 41 and the 2nd light source 42 are arrange | positioned facing the entrance plane 111 and the entrance plane 121, respectively. In the present embodiment, each of the first light source 41 and the second light source 42 includes a plurality of LEDs. The first light source 41 is controlled by the first light source control unit 410, and the second light source 42 is controlled by the second light source control unit 420. As described above, the light source 4 is configured by the first light source 41 for the first light guide unit 11 and the second light source 42 for the second light guide unit 12, thereby the first light source 41 and the second light source 42. It is possible to individually adjust the light output, and as a result, it is possible to adjust the amount of light extracted from the exit surface 112 and the exit surface 122.
　第１導光手段１１および第２導光手段１２のそれぞれの出射面１１２、出射面１２２に対向する対向面１１３、対向面１２３には、図示しない拡散印刷、プリズム、マイクロレンズ等の拡散パターンが施されている。これら拡散パターンは、入射面１１１、入射面１２１から入射される第１光源４１、第２光源４２からの出射光を出射面１１２、出射面１２２側に取り出す働きをするものである。 Each of the first light guide unit 11 and the second light guide unit 12 has a light emission surface 112, a counter surface 113 facing the light output surface 122, and a counter surface 123 having diffusion patterns such as diffusion printing, prisms, and microlenses (not shown). It has been subjected. These diffusion patterns serve to extract the outgoing light from the first light source 41 and the second light source 42 incident from the incident surface 111 and the incident surface 121 to the exit surface 112 and the exit surface 122 side.
　反射手段５は、第１導光手段１１とベース３の間、および第２導光手段１２とベース３の間に挟まれる形で配置されている。反射手段５は、それぞれの導光手段の出射面に対向する対向面１１３、対向面１２３より出た光を反射し、出射面１１２、出射面１２２から再度取り出すことによって、光をより有効利用するために用いられる。 The reflecting means 5 is disposed between the first light guide means 11 and the base 3 and between the second light guide means 12 and the base 3. The reflection means 5 reflects light emitted from the facing surface 113 and the facing surface 123 facing the exit surface of each light guide means, and takes out the light from the exit surface 112 and the exit surface 122 again, thereby making more effective use of the light. Used for.
　（結合部について）
　光源４と第１導光手段１１および第２導光手段１２の結合部近辺には、結合部反射部材６が設けられている。光源４から出射する光は拡がりをもっているため、放射角の大きい一部の光は第１導光手段１１、第２導光手段１２のそれぞれの入射面に入射されない。よって、入射面から外れてしまう光を反射により再度入射面に導き、光源４からの光の利用効率を向上できるように、結合部反射部材６が配置されている。 (About the joint)
A coupling portion reflecting member 6 is provided in the vicinity of the coupling portion between the light source 4, the first light guide unit 11, and the second light guide unit 12. Since the light emitted from the light source 4 has a spread, some light having a large radiation angle is not incident on the respective incident surfaces of the first light guide unit 11 and the second light guide unit 12. Therefore, the coupling portion reflecting member 6 is arranged so that light that is off the incident surface can be guided to the incident surface again by reflection and the light use efficiency from the light source 4 can be improved.
　（第１光源、第２光源の構成と色調整について）
　図６は、第１光源４１、第２光源４２の構成を詳細に示した図である。第１光源４１、第２光源４２には、それぞれ白色ＬＥＤ４３と、電球色ＬＥＤ４４が複数混在して配置されている。このような構成とすることで、出射面１１２、出射面１２２からの取り出し光の色調制御が可能となっている。例えば、出射面１１２、出射面１２２から白色の光を取り出したい場合は、白色ＬＥＤ４３のみを点灯させればよく、電球色の光を取り出したい場合は、電球色ＬＥＤ４４のみを点灯させればよい。また、白色ＬＥＤ４３と電球色ＬＥＤ４４同時に点灯し、各色の光量の割合を調整することにより、出射面１１２、出射面１２２からの取り出し光の色調を変化させることが可能となる。 (Regarding the configuration and color adjustment of the first light source and the second light source)
FIG. 6 is a diagram showing the configuration of the first light source 41 and the second light source 42 in detail. In the first light source 41 and the second light source 42, a plurality of white LEDs 43 and a plurality of light bulb color LEDs 44 are mixed. By adopting such a configuration, it is possible to control the color tone of light extracted from the emission surface 112 and the emission surface 122. For example, when it is desired to extract white light from the emission surface 112 and the emission surface 122, only the white LED 43 needs to be lit. Further, by turning on the white LED 43 and the light bulb color LED 44 at the same time and adjusting the ratio of the amount of light of each color, it is possible to change the color tone of the light extracted from the emission surface 112 and the emission surface 122.
　さらに、第１光源４１、第２光源４２は、第１光源制御手段４１０、第２光源制御手段４２０によりそれぞれ独立で制御可能であるため、出射面１１２、出射面１２２からの取り出し光はそれぞれ独立で色調の制御を行うことが可能となっている。 Furthermore, since the first light source 41 and the second light source 42 can be controlled independently by the first light source control means 410 and the second light source control means 420, the light extracted from the emission surface 112 and the emission surface 122 is independent. It is possible to control the color tone.
　本実施形態では、色調制御を行うための光源の構成として、白色と電球色のＬＥＤ光源を使用しているが、使用する光源の種類や色、配列についてはこれに限らず、目的に応じて、種類や色、配列、個数を適宜決定すればよい。 In the present embodiment, white and bulb-color LED light sources are used as the configuration of the light source for color tone control. However, the type, color, and arrangement of the light sources to be used are not limited to this, and depending on the purpose. The type, color, arrangement, and number may be determined as appropriate.
　（導光手段内周部の固定方法）
　図５に示すように、光源４と各導光手段の結合部付近は、上下二つのカバー７に挟まれる形で覆われているため、塵や埃の進入を防ぐことが可能となっている。カバー７は、基本的には軽量のものが望ましく、デザイン性などを考慮して決定されれば良い。また、上下のカバー７の外周部が、第１導光手段１１、第２導光手段１２を固定しているため、第１導光手段１１、第２導光手段１２それぞれの上下方向の位置を規制しており、重力方向に発生する導光手段の撓みを抑える効果がある。上下のカバー７は、図３に示すベース３の内側の凹凸部と位置あわせをして組み合わせ、ねじ止め固定される。 (Fixing method of inner periphery of light guide means)
As shown in FIG. 5, the vicinity of the coupling portion between the light source 4 and each light guide means is covered so as to be sandwiched between two upper and lower covers 7, so that dust and dust can be prevented from entering. . The cover 7 is basically preferably lightweight, and may be determined in consideration of design and the like. Moreover, since the outer peripheral part of the upper and lower covers 7 fixes the first light guide means 11 and the second light guide means 12, the vertical positions of the first light guide means 11 and the second light guide means 12 respectively. And is effective in suppressing the bending of the light guide means generated in the direction of gravity. The upper and lower covers 7 are aligned and combined with the concave and convex portions inside the base 3 shown in FIG.
　（導光手段外周部の固定方法）
　図７は、第１導光手段１１、第２導光手段１２の外周部における固定方法について説明した図である。第１導光手段１１、第２導光手段１２の外周部は、外枠１０によって固定され、一体となっている。導光手段と外枠１０との固定方法に関しては、例えば接着剤や溶着など、強固に接着固定できる方法であればどの方法でも構わない。外枠１０に用いられる材料は、熱膨張に耐えうる材質であって、望ましくは導光手段と同じかそれに近い熱膨張率を備えるものが望ましい。具体的には、例えばアクリル樹脂、ポリカーボネート、ＡＢＳ樹脂、アルミなどが用いられる。 (Fixing method of outer periphery of light guide means)
FIG. 7 is a diagram for explaining a fixing method in the outer peripheral portion of the first light guide unit 11 and the second light guide unit 12. The outer peripheral portions of the first light guide unit 11 and the second light guide unit 12 are fixed by the outer frame 10 and are integrated. As a method for fixing the light guide means and the outer frame 10, any method may be used as long as it can be firmly bonded and fixed, for example, an adhesive or welding. The material used for the outer frame 10 is a material that can withstand thermal expansion, and preferably has a thermal expansion coefficient that is the same as or close to that of the light guide means. Specifically, for example, acrylic resin, polycarbonate, ABS resin, aluminum or the like is used.
　組立の方法としては、第１導光手段１１、第２導光手段１２をベース３に対して、位置決めピン８とピン受け部９の係合によりベース３に対して位置決めを行った後、各導光手段を外枠１０に対して固定することにより、各導光手段はどの姿勢においてもベース３から外れなくなる。 As an assembly method, after positioning the first light guide means 11 and the second light guide means 12 with respect to the base 3 with respect to the base 3 by engaging the positioning pins 8 and the pin receiving portions 9, By fixing the light guide means to the outer frame 10, each light guide means does not come off the base 3 in any posture.
　上記のような固定方法を用いると、各導光手段はベース３に対してネジ止めや接着等で直接固定する必要が無い。導光手段とベース３をネジ止めや接着等で直接固定した場合、環境温度が変化した場合、あるいは光源４の点灯により、熱が発生すると、各部材の熱膨張率の違いから、各導光手段やベース３に歪みが発生し、その結果、光源４と各導光手段の入射面１１１、入射面１２１との間に位置ずれが発生し、光学性能が低下する。しかし、本実施形態の構成によれば、第１導光手段１１、第２の導光手段１２はベース３に対して接着剤などを用いて完全に固定されているわけではないため、熱膨張率の違いにより発生する部材の歪みを防ぐことが可能となっている。 When the fixing method as described above is used, each light guide means does not need to be directly fixed to the base 3 by screwing or bonding. When the light guide means and the base 3 are directly fixed by screwing, bonding, or the like, when the environmental temperature changes, or when heat is generated due to the lighting of the light source 4, each light guide means from the difference in thermal expansion coefficient of each member. As a result, distortion occurs in the means and the base 3, and as a result, a positional shift occurs between the light source 4 and the incident surface 111 and the incident surface 121 of each light guide means, and the optical performance is deteriorated. However, according to the configuration of the present embodiment, the first light guide unit 11 and the second light guide unit 12 are not completely fixed to the base 3 using an adhesive or the like. It is possible to prevent member distortion caused by the difference in rate.
　また、外枠１０は、第１導光手段１１、第２導光手段１２の全周を覆うように固定されているため、外周部から導光手段の対向面１１３、対向面１２３側への塵や埃の侵入を防ぎ、光学特性の低下を防止することが可能となっている。 Further, since the outer frame 10 is fixed so as to cover the entire circumference of the first light guide unit 11 and the second light guide unit 12, the outer frame 10 faces the opposing surface 113 and the opposing surface 123 side of the light guide unit. It is possible to prevent dust and dust from entering and prevent deterioration of optical characteristics.
　ここで、外枠１０の熱膨張率は、第１導光手段１１、第２導光手段１２の熱膨張率と略同一であれば、なお好ましい。外枠１０と第１導光手段１１、第２導光手段１２とで熱膨張率が異なる場合、環境温度が変化した際に、各部材を接着固定しているため、部材に歪みが生じるが、固定する各部材の熱膨張率を略同一とすることにより、環境温度変化時における歪みを低減することが可能となる。 Here, it is more preferable that the thermal expansion coefficient of the outer frame 10 is substantially the same as that of the first light guide means 11 and the second light guide means 12. When the outer frame 10 and the first light guide unit 11 and the second light guide unit 12 have different coefficients of thermal expansion, the members are bonded and fixed when the environmental temperature changes. By making the thermal expansion coefficient of each member to be fixed substantially the same, it becomes possible to reduce the distortion at the time of environmental temperature change.
　（照明装置の設置）
　次に照明装置の設置について説明する。本実施形態では、両面発光の照明装置１００を例に説明しているため、照明装置１００はワイヤーにより吊り下げる方式となっている。なお、照明装置１００の仕様によっては、天井に直接固定しても良い。直接固定の場合は、天井に設置されたLED用の電源と、光源４を配線によって接続する。吊り下げ方式の場合は、天井に設置されたLED電源からワイヤーを垂らし、照明器具１００を吊り下げる。 (Installation of lighting equipment)
Next, installation of the lighting device will be described. In this embodiment, since the illumination device 100 with double-sided light emission is described as an example, the illumination device 100 is suspended by a wire. Note that, depending on the specifications of the lighting device 100, it may be directly fixed to the ceiling. In the case of direct fixing, the LED power source installed on the ceiling and the light source 4 are connected by wiring. In the case of the hanging method, a wire is hung from the LED power source installed on the ceiling, and the lighting apparatus 100 is suspended.
　ワイヤーの先端は、照明器具のベース３あるいはカバー７に設けられた吊り下げ金具と連結される。吊り下げ方式の場合の電源と光源間の配線方法としては、吊り下げ用のワイヤーと配線を兼用にしても良いし、電源と光源を繋ぐ配線を別に配しても良い。この場合、配線は１本でよい。 The tip of the wire is connected to a hanging fitting provided on the base 3 or cover 7 of the lighting fixture. As a wiring method between the power source and the light source in the case of the suspension method, the suspension wire and the wiring may be used together, or the wiring connecting the power source and the light source may be separately provided. In this case, only one wiring is sufficient.
　＜実施形態２＞
　本発明の実施形態２に係る照明装置２００について、図８～図１１に基づいて説明する。本実施形態では、照明装置２００において第１拡散手段８１、第２拡散手段８２を有する点で実施形態１とは異なる。図８（ａ）は照明装置２００の第１導光手段１１側から見た図であり、図８（ｂ）は照明装置２００の第２導光手段１２側から見た図である。また、図９は照明装置２００の分解図である。なお、実施形態２の照明装置２００は、第１拡散手段８１、第２拡散手段８２を除いて第１実施形態の照明装置１００と同一の構成をしており、同一構成部には同一参照番号を付している。なお、以下の説明では、本発明を実施するために技術的に好ましい種々の限定が付されているが、本発明の範囲は以下の実施形態および図面に限定されるものではない。 <Embodiment 2>
An illumination device 200 according to Embodiment 2 of the present invention will be described with reference to FIGS. The present embodiment is different from the first embodiment in that the lighting device 200 includes the first diffusing unit 81 and the second diffusing unit 82. 8A is a diagram viewed from the first light guide unit 11 side of the illumination device 200, and FIG. 8B is a diagram viewed from the second light guide unit 12 side of the illumination device 200. FIG. FIG. 9 is an exploded view of the lighting device 200. In addition, the illuminating device 200 of Embodiment 2 has the same configuration as the illuminating device 100 of the first embodiment except for the first diffusing unit 81 and the second diffusing unit 82, and the same reference numerals denote the same components. Is attached. In the following description, various technically preferable limitations for carrying out the present invention are given, but the scope of the present invention is not limited to the following embodiments and drawings.
　（照明装置の構成）
　本実施形態における照明装置２００は、第１導光手段１１と、第２導光手段１２と、上記２つの導光手段の間に介在するベース３と、上記２つの導光手段に光を入射する光源４と、上記２つの導光手段とベース３の間に介在する反射手段５と、上記２つの導光手段と光源４の結合部付近に配置された結合部反射手段６と、上記２つの導光手段の出射面側にそれぞれ配置された第１拡散手段８１、第２拡散手段８２と、上記２つの導光手段と光源４の結合部を覆うカバー７と、上記第１導光手段１１、第２導光手段１２の全周を覆う外枠１０から構成されている。 (Configuration of lighting device)
The illuminating device 200 according to this embodiment has light incident on the first light guide means 11, the second light guide means 12, the base 3 interposed between the two light guide means, and the two light guide means. Light source 4, reflecting means 5 interposed between the two light guide means and the base 3, a coupling part reflecting means 6 disposed in the vicinity of the coupling part of the two light guiding means and the light source 4, and 2 First diffusing means 81 and second diffusing means 82 disposed on the exit surface side of each of the two light guiding means, a cover 7 covering the coupling portion between the two light guiding means and the light source 4, and the first light guiding means 11 and an outer frame 10 that covers the entire circumference of the second light guiding means 12.
　（拡散手段について）
　図１０は、本実施形態に係る照明装置２００の断面図である。第１拡散手段８１は、第１導光手段１１の出射面１１２側に配置されており、第２拡散手段８２は、第２導光手段１２の出射面１２２側に配置されている。第１導光手段１１、第２導光手段１２のそれぞれの出射面１１２、出射面１２２より取り出された光は、それぞれ第１拡散手段８１、第２拡散手段８２に入射する。それぞれの拡散手段に到達した光は、拡散手段８１、８２を通過することにより拡散され、照明の照度分布が均一化される。 (About diffusion means)
FIG. 10 is a cross-sectional view of the lighting device 200 according to the present embodiment. The first diffusion means 81 is disposed on the emission surface 112 side of the first light guide means 11, and the second diffusion means 82 is disposed on the emission surface 122 side of the second light guide means 12. The light extracted from the emission surface 112 and the emission surface 122 of the first light guide unit 11 and the second light guide unit 12 is incident on the first diffusion unit 81 and the second diffusion unit 82, respectively. The light reaching each diffusion means is diffused by passing through the diffusion means 81 and 82, and the illuminance distribution of illumination is made uniform.
　（導光手段内周部の固定方法）
　図１０に示すように、光源４と各導光手段の結合部付近は、上下のカバー７及び第１拡散手段８１、第２拡散手段８２に挟まれる形で覆われており、また、上下のカバー７の外周部は、第１拡散手段８１、第２拡散手段８２とそれぞれ固定されている。このような構成により、第１導光手段１１、第２導光手段１２、ベース３、光源４、反射手段５、結合部反射手段６は、第１拡散手段８１、第２拡散手段８２および上下のカバー７によって封止されるため、塵や埃の進入を防ぐことが可能となっている。さらに、第１拡散手段８１、第２拡散手段８２は、第１導光手段１１、第２導光手段１２それぞれのＺ方向の位置を規制することで、重力方向に発生する導光手段の撓みを抑える効果がある。 (Fixing method of inner periphery of light guide means)
As shown in FIG. 10, the vicinity of the coupling portion between the light source 4 and each light guide means is covered by being sandwiched between the upper and lower covers 7, the first diffusing means 81, and the second diffusing means 82. The outer periphery of the cover 7 is fixed to the first diffusion means 81 and the second diffusion means 82, respectively. With such a configuration, the first light guide unit 11, the second light guide unit 12, the base 3, the light source 4, the reflection unit 5, and the coupling unit reflection unit 6 include the first diffusion unit 81, the second diffusion unit 82, and the upper and lower sides. Therefore, it is possible to prevent dust and dust from entering. Further, the first diffusing unit 81 and the second diffusing unit 82 bend the light guiding unit generated in the gravity direction by regulating the positions of the first light guiding unit 11 and the second light guiding unit 12 in the Z direction. There is an effect to suppress.
　（導光手段外周部の固定方法）
　図１１は、第１導光手段１１、第２導光手段１２の外周部における固定方法について説明した図である。第１導光手段１１、第２導光手段１２の外周部は、外枠１０によって固定され、一体となっている。また、第１拡散手段８１、第２拡散手段８２もそれぞれ外枠１０に固定され、一体となっている。導光手段、拡散手段、外枠１０との固定手段に関しては、例えば接着剤や溶着など、強固に接着固定できる方法であればどの方法でも構わない。 (Fixing method of outer periphery of light guide means)
FIG. 11 is a diagram illustrating a fixing method in the outer peripheral portion of the first light guide unit 11 and the second light guide unit 12. The outer peripheral portions of the first light guide unit 11 and the second light guide unit 12 are fixed by the outer frame 10 and are integrated. Further, the first diffusing unit 81 and the second diffusing unit 82 are also fixed to the outer frame 10 and integrated. As for the light guiding means, the diffusing means, and the fixing means to the outer frame 10, any method may be used as long as it is a method capable of firmly bonding and fixing, such as an adhesive or welding.
　組立の方法としては、第１導光手段１１、第２導光手段１２をベース３に対して、位置決めピン８とピン受け部９の係合によりベース３に対して位置決めを行った後、各導光手段を外枠１０に対して固定し、その後、第１拡散手段８１と第２拡散手段８２の外周部を外枠１０に対して固定することにより、各導光手段および各拡散手段はどの姿勢においてもベース３から外れなくなる。外枠１０は、第１導光手段１１、第２導光手段１２の全周を覆うように固定されているため、外周部から導光手段の対向面１１３、対向面１２３側への塵や埃の侵入を防ぎ、光学特性の低下を防止することが可能となっている。また、拡散手段８１、拡散手段８２の外周部も外枠１０に対してほぼ密閉固定されているため、外周部から導光手段の出射面１１２、出射面１２２側への塵や埃の侵入を防ぎ、光学特性の低下を防止することが可能となっている。 As an assembly method, after positioning the first light guide means 11 and the second light guide means 12 with respect to the base 3 with respect to the base 3 by engaging the positioning pins 8 and the pin receiving portions 9, By fixing the light guide means to the outer frame 10, and then fixing the outer peripheral portions of the first diffusion means 81 and the second diffusion means 82 to the outer frame 10, each light guide means and each diffusion means are It will not come off the base 3 in any posture. Since the outer frame 10 is fixed so as to cover the entire circumference of the first light guide means 11 and the second light guide means 12, dust or dust from the outer peripheral portion to the opposing surface 113 and the opposing surface 123 side of the light guide means It is possible to prevent dust from entering and prevent deterioration of optical characteristics. Further, since the outer peripheral portions of the diffusing means 81 and the diffusing means 82 are also substantially hermetically fixed to the outer frame 10, dust and dust intrusion from the outer peripheral portions to the exit surface 112 and the exit surface 122 side of the light guide means is prevented. It is possible to prevent the deterioration of optical characteristics.
　以上、本発明の照明装置を、照明機器を始めとする電子機器に搭載することで、必要な部分を必要な光量で照射できる装置を実現することができる。なお、実施形態においては、第１光源４１、第２光源４２をＬＥＤとしたが、これに限定されるものではなく、例えば有機ＥＬ等、導光手段に光を結合可能な光源であれば実現可能である。また、上記実施形態においては、両面発光の照明装置について説明したが、これに限定されるものではなく、導光板を利用したすべての照明装置において有効である。 As described above, by mounting the lighting device of the present invention on an electronic device such as a lighting device, a device capable of irradiating a necessary portion with a necessary light amount can be realized. In the embodiment, the first light source 41 and the second light source 42 are LEDs. However, the present invention is not limited to this, and any light source capable of coupling light to the light guide means, such as an organic EL, is realized. Is possible. In the above-described embodiment, the double-sided lighting device has been described. However, the present invention is not limited to this, and is effective in all lighting devices using a light guide plate.
　本発明は上述した実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能である。すなわち、請求項に示した範囲で適宜変更した技術的手段を組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。すなわち、発明の詳細な説明の項においてなした具体的な実施態様または実施例は、あくまでも、本発明の技術内容を明らかにするものであって、そのような具体例にのみ限定して狭義に解釈されるべきものではなく、本発明の精神と次に記載する特許請求事項の範囲内で、いろいろと変更して実施することができるものである。 The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope indicated in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention. That is, the specific embodiments or examples made in the detailed description of the invention are intended to clarify the technical contents of the present invention, and are limited to such specific examples in a narrow sense. It should be understood that the invention can be practiced with various modifications within the spirit of the invention and the scope of the following claims.
　本発明の照明装置は、照明機器、液晶表示素子のバックライトを始めとする電子機器に用いることができる。 The lighting device of the present invention can be used for lighting devices and electronic devices such as backlights of liquid crystal display elements.
　３　ベース
　４　光源
　５　反射手段
　６　結合部反射手段
　７　カバー
　８　位置決めピン
　９　ピン受け部
　１０　外枠
　１１　第１導光手段
　１２　第２導光手段
　４１　第１光源
　４２　第２光源
　４３　白色ＬＥＤ
　４４　電球色ＬＥＤ
　８１　第１拡散手段
　８２　第２拡散手段
　１００、２００　照明装置
　１１１、１２１　入射面
　１１２、１２２　出射面
　１１３、１２３　対向面 DESCRIPTION OF SYMBOLS 3 Base 4 Light source 5 Reflection means 6 Coupling part reflection means 7 Cover 8 Positioning pin 9 Pin receiving part 10 Outer frame 11 1st light guide means 12 2nd light guide means 41 1st light source 42 2nd light source 43 White LED
44 Light bulb color LED
81 First diffusion means 82 Second diffusion means 100, 200 Illumination device 111, 121 Incident surface 112, 122 Output surface 113, 123 Opposing surface

Claims (9)

  1. 　光源と、前記光源からの光を導光する導光手段と、前記光源が取り付けられるベースとを有する照明装置であって、
    　前記ベースに設けられた位置決めピンまたはピン受け部と、前記導光手段に設けられたピン受け部または位置決めピンとが係合し、
    　前記位置決めピンと前記ピン受け部の間には、熱膨張を緩和するための空隙を有することを特徴とする照明装置。     An illumination device having a light source, a light guide means for guiding light from the light source, and a base to which the light source is attached,
    A positioning pin or pin receiving portion provided on the base engages with a pin receiving portion or positioning pin provided on the light guide means,
    An illuminating device having a gap for relaxing thermal expansion between the positioning pin and the pin receiving portion.
  2. 　前記光源は、複数の発光源により構成されていることを特徴とする請求項１記載の照明装置。 The lighting device according to claim 1, wherein the light source is composed of a plurality of light emitting sources.
  3. 　前記複数の発光源は、色度の異なる発光源の組み合わせにより構成されていることを特徴とする請求項２に記載の照明装置。 The lighting device according to claim 2, wherein the plurality of light emitting sources are configured by a combination of light emitting sources having different chromaticities.
  4. 　前記導光手段は、前記光源からの光を導光する第１導光手段、第２導光手段とからなり、
    　前記ベースは、前記第１導光手段、第２導光手段の間に介在し、
    　前記光源は、前記第１導光手段の入射面に光を入射する第１光源と、前記第２導光手段の入射面に光を入射する第２光源により構成されていることを特徴とする請求項１から３のいずれか１項に記載の照明装置。     The light guide means includes a first light guide means and a second light guide means for guiding light from the light source,
    The base is interposed between the first light guide means and the second light guide means,
    The light source includes a first light source that makes light incident on an incident surface of the first light guide unit, and a second light source that makes light incident on an incident surface of the second light guide unit. The lighting device according to any one of claims 1 to 3.
  5. 　前記ベース両面に設けられた位置決めピンまたはピン受け部と、前記第１導光手段、第２導光手段にそれぞれ設けられたピン受け部または位置決めピンとが係合し、かつ、前記第１導光手段、第２導光手段の外周部は、外枠により固定されていることを特徴とする請求項４に記載の照明装置。 Positioning pins or pin receiving portions provided on both surfaces of the base engage with pin receiving portions or positioning pins provided on the first light guide means and the second light guide means, respectively, and the first light guide The illuminating device according to claim 4, wherein the outer peripheral portion of the means and the second light guide means is fixed by an outer frame.
  6. 　前記外枠の熱膨張率は、前記第１導光手段、第２導光手段の熱膨張率と略同一であることを特徴とする請求項５に記載の照明装置。 6. The lighting device according to claim 5, wherein a thermal expansion coefficient of the outer frame is substantially the same as a thermal expansion coefficient of the first light guide unit and the second light guide unit.
  7. 　前記導光手段の一部と前記光源は、カバーにより覆われ、前記カバーの外周部は、前記導光手段に接触していることを特徴とする請求項１から６のいずれか１項に記載の照明装置。 The part of the light guide unit and the light source are covered with a cover, and an outer peripheral portion of the cover is in contact with the light guide unit. Lighting equipment.
  8. 　前記導光手段の出射面側に拡散手段をさらに有することを特徴とする請求項１から７のいずれか１項に記載の照明装置。 The illumination device according to any one of claims 1 to 7, further comprising a diffusing unit on an exit surface side of the light guiding unit.
  9. 　請求項１から８のいずれか１項に記載の照明装置を備えたことを特徴とする電子機器。 An electronic apparatus comprising the lighting device according to any one of claims 1 to 8.
PCT/JP2012/052645 2011-02-04 2012-02-06 Illumination device and electronic instrument using same WO2012105713A1 (en)

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