WO2010055940A1 - Dispositif d'éclairage et procédé pour fabriquer une plaque de guidage de lumière utilisée dans celui-ci - Google Patents

Dispositif d'éclairage et procédé pour fabriquer une plaque de guidage de lumière utilisée dans celui-ci Download PDF

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Publication number
WO2010055940A1
WO2010055940A1 PCT/JP2009/069449 JP2009069449W WO2010055940A1 WO 2010055940 A1 WO2010055940 A1 WO 2010055940A1 JP 2009069449 W JP2009069449 W JP 2009069449W WO 2010055940 A1 WO2010055940 A1 WO 2010055940A1
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WO
WIPO (PCT)
Prior art keywords
light
light guide
guide plate
groove
emitted
Prior art date
Application number
PCT/JP2009/069449
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English (en)
Japanese (ja)
Inventor
夏子 松土
和貴 伊勢
弘樹 佐藤
和宏 高橋
優貴 八島
徹 伊藤
Original Assignee
アルプス電気株式会社
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.)
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Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Priority to CN200980144034.5A priority Critical patent/CN102203500B/zh
Priority to JP2010537826A priority patent/JP5281095B2/ja
Publication of WO2010055940A1 publication Critical patent/WO2010055940A1/fr

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    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide

Definitions

  • the present invention relates to a lighting device including a light source and a light guide plate, and a method for manufacturing a light guide plate used therefor, and more particularly, to a configuration of the light guide plate in the lighting device and a method for manufacturing the same.
  • This type of illuminating device guides light emitted from a light source to a required illumination unit using a light guide plate having a light incident surface and a light exit surface, and illuminates the illumination unit with light emitted from the light exit surface.
  • a light guide plate having a light incident surface and a light exit surface
  • it is required to be thin and to have a uniform luminance of the light exit portion.
  • a thick light introduction portion 203 and a thin light output portion 204 are integrally formed via a stepped surface 202 formed in a sawtooth shape.
  • the light guide plate 201 is provided, and an outer surface of the light introducing portion 203 facing the step surface 202 of the light introducing portion 203 is set as a light incident surface 205, and a plurality of light sources 206 are set to face the light incident surface 205. Is incident on the light output unit 204, and one main surface of the light output unit is used as the light output surface 207 to extract light from this surface.
  • the illumination device described in Patent Document 1 is configured to guide the light incident from the light incident surface 205 to the light output unit 204 disposed in a direction facing the light incident surface 205, the luminance of the light exit surface 207 is made uniform.
  • a plurality of light sources 206 must be densely arranged along the light incident surface 205, which increases the cost of the lighting device and increases the power consumption. There is a point. Such a problem becomes more prominent as the length of the light introducing portion 203 increases.
  • the present invention has been made to solve such problems of the prior art, and an object thereof is to provide a light guide plate that can control the luminance distribution with a small number of light sources and obtain high-luminance illumination quality.
  • An object of the present invention is to provide an illumination device and to provide a method for easily and highly accurately manufacturing a light guide plate applied to the illumination device.
  • the present invention provides a lighting device including a light source and a light guide plate having a light incident surface and a light exit surface for light emitted from the light source, wherein the light guide plate includes the light incident surface.
  • a first light guide portion that guides light emitted from the light source in the longitudinal direction, and a second light guide portion that is provided in parallel with the first light guide portion and whose one main surface serves as the light output surface;
  • the groove portion is provided between the first light guide portion and the second light guide portion, and the groove portion has a thickness of the light guide plate along the longitudinal direction of the first light guide portion. Is characterized by changes.
  • the light emitted from the light source is guided in the longitudinal direction of the first light guide part, and the light is guided to the second light guide part via the groove part.
  • the range that can be illuminated by one light source can be expanded.
  • a groove is provided between the first light guide and the second light guide, and the thickness of the light guide plate in the groove changes along the longitudinal direction of the first light guide.
  • the present invention is characterized in that, in the illumination device having the above-described configuration, the light source is disposed opposite to an end surface in a longitudinal direction of the first light guide unit.
  • the light incident efficiency to the first light guide part can be increased.
  • This configuration can be applied to a lighting device using a single-sided light emitting diode as a light source.
  • the present invention is characterized in that the light source is arranged in a light source setting recess formed in the first light guide in the illumination device having the above-described configuration.
  • the light guide plate When the light source is disposed in the light source setting recess formed in the first light guide portion, the light guide plate can be saved in space, and a light guide body with higher design can be realized.
  • This configuration can be applied to an illuminating device using a light emitting diode of a full light emission type or a double light emission type as a light source.
  • a prism that guides light propagating through the first light guide unit into the second light guide unit through the groove unit is formed in the groove unit.
  • the light propagating through the first light guide unit can be efficiently guided into the second light guide unit by the prism formed in the groove, so that the light use efficiency is increased and the luminance of the light exit surface is increased. Can be increased.
  • the present invention is characterized in that, in the illumination device having the above configuration, the thickness change of the light guide plate in the groove portion is a step structure.
  • the thickness change of the light guide plate can be a step structure or a slope structure, but the step structure is easy to process and the mirror surface of the processed surface can be made high, so it has high performance lighting.
  • the device can be manufactured at low cost.
  • the light guide plate has a curved portion in at least a part of the first light guide portion.
  • the light guide plate provided in the illumination device of the present invention propagates light incident from the light source along the longitudinal direction of the first light guide part, by providing a curved part at least at a part of the first light guide part, Light can be guided to an arbitrary part, and a highly versatile lighting device can be obtained.
  • the light guide plate has a planar shape formed in an annular shape.
  • the present invention is characterized in that, in the illumination device having the above-described configuration, means for increasing light extraction efficiency from the light exit surface is provided on the light exit surface and a surface facing the light exit surface.
  • a diffusion sheet is provided on the light exit surface, a reflection sheet is provided on the opposite surface of the light exit surface, or fine irregularities for diffusing light are formed on these surfaces.
  • a means If these means are applied to an appropriate surface, the light extraction efficiency from the light exit surface can be increased, so that the brightness of the light exit surface can be increased.
  • the present invention is characterized in that, in the illumination device having the above configuration, a light emitting diode is used as the light source.
  • the light source setting unit of the lighting device can be miniaturized and the power consumption of the lighting device can be suppressed by using the light emitting diode as a light source.
  • light-emitting diodes such as full-light-emitting type, double-sided light-emitting type, and single-sided light-emitting type, so that a lighting device that can be used for various purposes by selecting the required light-emitting diode as required Can be easily manufactured.
  • the first light guide unit is separated from the first light guide unit by a groove on the opposite side of the second light guide unit via the first light guide unit, and emitted from the light source.
  • a third light guide portion capable of propagating light farthest when viewed from the light source is provided.
  • the distance from the light source increases.
  • the amount of light decreases and it is difficult to propagate far away.
  • the amount of light incident on the third light guide portion is reduced even if the distance from the light source is increased because the third light guide portion is formed at a position away from the second light guide portion. It is difficult to propagate and propagates far away. Therefore, it is possible to increase the illuminance of a part away from the light source.
  • the groove portion that separates the first light guide portion and the third light guide portion may include a linear portion that is formed at a position close to the light incident surface, and a curved portion that follows the straight portion.
  • the width of the third light guide part in the curved part is made narrower than the width of the third light guide part in the linear part.
  • the amount of light emitted from the wall surface to the outside increases, so the light guide loss increases.
  • the third guide in the curved portion is increased.
  • the width of the light part narrower than the width of the third light guide part in the straight line part, it is possible to reduce the light guide loss and propagate the necessary light quantity to the tip of the curved part.
  • variety of the 3rd light guide part in a curve part is narrowed, the light quantity which can be used in the straight part before this can be increased relatively, and the uniform illumination of an illumination part is attained as a whole.
  • a groove is formed in a required portion in the first light guide and the second light guide, and in the first light guide and the second light guide.
  • All the groove parts formed in the light guide plate including the formed groove parts are constituted by through holes and depressions having a depth of about 80% of the plate thickness of the light guide plate.
  • the groove portion When the groove portion is formed in the first light guide portion and the second light guide portion, the light quantity distribution in the groove forming portion and its peripheral portion can be adjusted. Therefore, even if the groove depth is not strictly adjusted, it is possible to adjust the required amount of light only by forming a groove portion composed only of a through hole and a recess having a depth of about 80% of the thickness of the light guide plate. Thus, the formation of the groove can be facilitated.
  • the present invention provides the illumination device having the above-described configuration, characterized in that a space portion is provided between the end portion of the groove portion and the light incident surface, to which the light guide portions are connected without the groove portion. To do.
  • each light guide portion since the light emitted from the light source is incident on each light guide portion via the space portion, it is possible to suppress luminance unevenness at the boundary portion of each light guide portion.
  • the amount of light incident on each light guide can be made uniform, the luminance on the light exit surface can be made uniform over a wide range without strictly adjusting the depth of the groove in the length direction.
  • the present invention is characterized in that, in the illumination device having the above-described configuration, the planar shape of the bolt through hole established in the light guide plate is a teardrop shape, and one end of the groove is connected to the end of the bolt through hole. To do.
  • the wall surface of the bolt through-hole formed in a teardrop shape can be used as a reflecting surface for guiding light, so that it is guided as compared with the case where the groove is formed by avoiding the bolt through-hole.
  • the width of the light portion can be increased, and the amount of light that can be propagated can be increased.
  • the present invention is characterized in that, in the illumination device having the above configuration, the curved portion is formed with a through hole.
  • the light guide loss is increased in the curved portion, but the light guide loss in the portion can be minimized by forming the curved portion with the through hole.
  • the groove is formed by laser processing, the smaller the groove depth, the greater the inclination of the processed surface. Can be suppressed.
  • the present invention is characterized in that, in the illumination device having the above-described configuration, no through-hole is formed in the linear portion except for the vicinity of the light incident surface.
  • a rib for fixing the light guide plate to another member is formed on the inner peripheral side of the light guide plate having a planar shape formed in an annular shape.
  • the groove is formed between the ribs.
  • the groove portion formed of a depression is formed on the back side of the light output surface set in the light guide plate.
  • a groove portion formed of a through hole is disposed along an arc surface of a teardrop-shaped bolt through hole opened in the light guide plate.
  • the present invention relates to a method for manufacturing a light guide plate, in which the present invention provides a plurality of light incident surfaces for light emitted from a light source and a plurality of light beams incident from the light incident surface to a required light exit surface by laser processing a raw material sheet.
  • a step of preparing a urethane sheet having a required thickness as the raw material sheet And a step of preparing a carbon dioxide laser capable of switching the output level between a high level and a low level as a laser device for laser processing the raw material sheet, and switching the output level of the carbon dioxide laser to a high level.
  • a light guide plate having a required groove portion can be manufactured simply by switching the output level of the laser device to two stages, so that compared to the case of manufacturing a light guide plate having a multi-stage groove depth.
  • the light guide plate can be easily manufactured.
  • a urethane sheet is used as the raw material sheet, a heat-affected portion due to laser irradiation is unlikely to occur, and the removal processing of the heat-affected portion can be eliminated. Therefore, a highly accurate light guide plate can be manufactured easily and at low cost.
  • the present invention relates to a method for manufacturing a light guide plate.
  • the present invention provides a plurality of light incident surfaces for light emitted from a light source, and a plurality of light incident from the light incident surface to a required light exit surface by laser processing a raw material sheet.
  • a step of preparing a polycarbonate sheet having a required thickness as the raw material sheet And a step of preparing a carbon dioxide laser capable of switching the output level between a high level and a low level as a laser device for laser processing the raw material sheet, and switching the output level of the carbon dioxide laser to a high level.
  • the present invention relates to a method for manufacturing a light guide plate.
  • the present invention provides a plurality of light incident surfaces for light emitted from a light source, and a plurality of light incident from the light incident surface to a required light exit surface by laser processing a raw material sheet.
  • a step of preparing a laminated sheet a step of preparing a carbon dioxide laser capable of switching an output level between a high level and a low level as a laser device for laser processing the raw material sheet, Switch the output level to a high level, irradiate a laser beam from the acrylic sheet side of the laminated sheet, and penetrate the outer shape of the light guide plate and the groove
  • a step of forming the portion and switching the output level of the carbon dioxide laser to a low level, irradiating a laser beam from the acrylic sheet side of the laminated sheet, and the depth of the groove is the thickness of the laminated sheet
  • the method includes a step of forming the following portions, and a step of removing, by chemical treatment, a thermally altered portion generated in the polycarbonate sheet by laser processing.
  • the acrylic sheet functions as a clad material for the light guide section made of a polycarbonate sheet, a light guide plate capable of exhibiting high light guide performance can be manufactured regardless of the optical conditions of the application location.
  • the present invention relates to a light guide plate, a plurality of light guide paths, a light incident surface for entering light emitted from a light source into any one of the light guide paths, and light propagating through the light guide paths to the outside.
  • the light guide path is arranged in parallel with each other via a groove portion, and a plurality of light entrance guides that individually enter the light emitted from the light sources from the light entrance surface.
  • An optical path, and a plurality of the light incident light guide paths and at least one light output light guide path arranged in parallel via the groove section, and the groove section extends from each of the plurality of light incident light guide paths to the groove section.
  • the thickness of the light guide plate is changed along the longitudinal direction so as to adjust the amount of light reaching the light guide path for light emission through the light source.
  • the light incident from the light incident surface of each light incident light guide first propagates in the length direction of each light incident light guide. And in the part with the light guide plate of a groove part, the light quantity according to the plate
  • the plate thickness of the groove portion formed on the light exiting light guide path side of one light entrance light guide passage and the plate thickness of the groove portion formed on the light exit light guide path side of the other light entrance light guide passage are adjusted.
  • the light propagating through these two light incident light guides leaks into the light output light guide in a quantity corresponding to the plate thickness of the groove, so that the emission color of the light exit surface of the light output light guide Color mixing can be performed at an arbitrary ratio of light. Therefore, by arranging a light source with a different color of emitted light for each light incident surface of each light incident light guide, the light emission surface of the light guide for light emission is color-graded without special printing on the light guide plate. It is possible to emit light with a light emission pattern applied.
  • the present invention is characterized in that a through hole reaching the bottom surface of the light guide plate is formed in a part of the groove.
  • the light guide plate is left only in the groove portion formed on the light exiting light guide path side of one light entrance light guide passage, and the groove portion formed on the light exit light guide path side of the other light entrance light guide passage is If a through hole reaching the bottom surface is opened, only the light propagating through the first light guide for light leakage leaks into the light guide for light output. Light can be emitted with a single color of light propagating in the optical path. As a result, a wider variety of emission colors can be obtained.
  • the thickness change of the light guide plate in the groove portion is a step structure.
  • the change in thickness of the light guide plate can be a stepped structure or a sloped structure, but the stepped structure is easy to process and the mirror surface of the processed surface can be made high, so it has high performance.
  • An optical plate can be manufactured at low cost.
  • the light guide path has a curved portion at least in a part of its length direction.
  • the light guide path has a planar shape formed in an annular shape.
  • the present invention provides a lighting device including a light source and a light guide plate having a light incident surface and a light output surface of light emitted from the light source, wherein the light guide plate includes a plurality of light guide paths, A light entrance surface for entering the light emitted from the light source into one of the light guides, and a light exit surface for exiting the light propagated in the light guides to the outside, and the groove as the light guide A plurality of incident light guides that individually enter the light emitted from a plurality of light sources having different colors of the emitted light from the light incident surface, and the plurality of light incident light guides.
  • At least one light guide for light emission arranged in parallel via the groove, the groove from each of the plurality of light guides for light input to the light guide for light output via the groove.
  • the light guide plate capable of appropriately adjusting the amount of light propagating from each light input light guide to the light output light guide is used, the light output from the light output light guide without any special printing on the light guide plate.
  • the surface can be made to emit light in a light emission pattern with a color gradation.
  • the light source includes a plurality of light sources having different colors of emitted light as the light source, and the plurality of light sources are formed on end surfaces of the plurality of light incident light guides. It was set as the arrangement
  • the light incident efficiency to the light incident light guide can be increased.
  • the light source is a light emitting device in which a plurality of elements having different emission colors are packaged, and the plurality of elements are formed on end surfaces of the plurality of light incident light guides. It was set as the structure arrange
  • Mounting cost can be reduced by using a light emitting device packaged as a light source.
  • the light source includes a plurality of light sources having different colors of emitted light as the light source, and the plurality of light sources are formed in each of the plurality of light incident light guides. It was set as the structure arrange
  • the light incident efficiency to the first light guide can be increased.
  • This configuration can be applied to an illuminating device using a light emitting diode of a full light emission type or a double light emission type as a light source.
  • the present invention is characterized in that, in the illumination device having the above-described configuration, the light source setting recess is filled with a transparent resin.
  • the light source is disposed in the light source setting recess formed in the light guide for incident light, and the gap between the light source and the light guide plate is filled with a transparent resin, thereby stabilizing the optical coupling due to misalignment of the light guide plate. be able to.
  • the thickness change of the light guide plate in the groove portion may be caused by the light incident on the light incident light guide formed at a position closest to the light output light guide.
  • the length direction of the light output light guide light is emitted from the position closest to the light source setting position toward the outside, and is incident on the light input light guide formed at the position farthest from the light output light guide.
  • the length direction of the light guide for light emission the light is emitted so as to be emitted outward from a position farthest from the set position of the light source.
  • the configuration of the light guide plate can be simplified and the cost of the lighting device can be reduced.
  • unexpected light mixing can be prevented, and a gradation of a desired color can be displayed on the light exit surface.
  • a prism that guides light propagating in the light guide for light incident to the light guide for light output through the groove is formed in the groove.
  • the light propagating through the light entrance light guide unit can be efficiently guided to the light output light guide unit side by the prism formed in the groove part. Brightness can be increased.
  • the illumination device guides the light emitted from the light source in the longitudinal direction of the first light guide, and guides the light to the second light guide through the groove.
  • the cost of the lighting device and power saving can be reduced by reducing the number of light sources.
  • a groove part is provided between the first light guide part and the second light guide part, and the thickness of the light guide plate in the groove part is changed, in the groove part according to the amount of light propagating through the first light guide part. By adjusting the thickness of the light guide plate, the luminance on the light exit surface can be made uniform.
  • the light guide plate manufacturing method according to the present invention can manufacture a light guide plate having a required groove by simply switching the output level of the laser device to two stages. Compared with the case of manufacturing an optical plate, the manufacture of the light guide plate can be facilitated.
  • FIG. 1 is a plan view of the lighting device according to the first embodiment
  • FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1
  • FIG. 3 is a side view of the lighting device according to the first embodiment as viewed from the light incident surface side. .
  • the lighting device 1A includes a single-sided light emitting diode 1 as a light source and a light guide plate 2 formed of a transparent resin material.
  • the light guide plate 2 includes a first light guide part 3, a second light guide part 4, and a groove part 5 provided between the first light guide part 3 and the second light guide part 4.
  • the planar shape is formed in a quadrangle. Since the lighting device 1A of this example uses the light emitting diode 1 as a light source, the lighting device 1A can be made thin and can reduce power consumption.
  • the first light guide 3 has a light incident surface 6 at one end surface in the length direction, and the light exit surface of the light emitting diode 1 is disposed opposite to the light incident surface 6.
  • the second light guide 4 is formed in parallel with the first light guide 3, and one main surface (the upper surface in this example) is the light exit surface 7.
  • the groove portion 5 has a shallower groove depth as the distance from the light incident surface 6 increases. In other words, the thickness of the light guide plate 2 in the groove portion 5 increases. It is formed.
  • the thickness change of the light guide plate 2 in the groove portion 5 has a step structure with substantially equal intervals.
  • the thickness change of the light guide plate 2 in the groove portion 5 has a stepped structure, the processing of the plate thickness change can be facilitated and the mirror surface degree of the processed surface can be increased, so that a high-performance lighting device can be manufactured at low cost. can do.
  • the thickness change of the light guide plate 2 in the groove portion 5 is in three stages.
  • the gist of the present invention is not limited to this, and there are two stages or four or more stages. It can be multistage.
  • the steps of the steps do not need to be equally spaced, and the height and length of the steps of the steps can be changed so that the luminance of the light exit surface 7 is uniform.
  • a clad film can be provided on the lower surface of the light guide plate 2.
  • the clad film is formed of a resin material having a light refractive index lower than that of the light guide plate 2.
  • the light guide plate 2 in this example is an imprint molding method, that is, after the transparent resin in a molten state is stretched between the mold die on which the reverse pattern of the light guide plate 2 is formed and the substrate, the mold die is peeled off. Can be created in a way. According to this method, it is possible to produce a very thin light guide plate that is difficult to produce by injection molding. Moreover, the light guide plate 2 of this example is an integrally molded product.
  • the light L emitted from the light emitting diode 1 is reflected by the side surface and the upper and lower surfaces of the first light guide unit 3 and the side surface of the groove unit 5 as shown in FIG. It propagates in the longitudinal direction of the part 3.
  • the light L propagating in the longitudinal direction in the first light guide 3 increases in light amount as the distance from the light incident surface 6 decreases, and decreases as the distance from the light incident surface 6 increases.
  • a part of the light L propagating in the first light guide part 3 passes through the groove part 5 and reaches the second light guide part 4 and is emitted from the light exit surface 7 to the outside. Is done.
  • the groove portion 5 is formed so that the plate thickness of the light guide plate 2 in the groove portion 5 increases as the distance from the light incident surface 6 increases, so that the first light guide portion 3 propagates.
  • the light incident surface 6 where the amount of light is high the light L entering the second light guide 4 is restricted, and the light incident surface 6 where the amount of light propagating through the first light guide 3 is low is far away. Then, the entrance of the light L into the second light guide 4 is promoted. Therefore, the luminance of the light exit surface 7 can be made uniform.
  • FIG. 4 is a plan view of the illumination device according to the second embodiment.
  • the illumination device 1 ⁇ / b> B does not position the light-emitting diode 1 on the end face of the light guide plate 2, but the light-emitting diode 1 is formed in the first light guide 3. 8 and is sealed with resin.
  • the lighting device 1B of this example since the light emitting diode 1 is housed in the light source setting concave portion 8, space saving as the lighting device can be achieved, and further, the light emitting diode 1 or the light guide plate 2 is displaced because it is sealed with resin. Therefore, it is possible to suppress a decrease in the efficiency of light incident on the first light guide unit 3.
  • FIG. 5 is a plan view of the illumination device according to the third embodiment.
  • the illuminating device 1 ⁇ / b> C is configured such that the light L propagating in the first light guide unit 3 is closer to the first light guide unit 3 of the light guide plate 2 through the groove unit 5.
  • a prism 9 that leads into the light guide 4 is formed.
  • the prism 9 is formed near the first light guide 3 of the light guide plate 2, so that the light L is smoothly propagated from the first light guide 3 to the second light guide 4.
  • the light use efficiency can be increased and the luminance of the light exit surface can be increased.
  • FIGS. 6 is a plan view of a lighting apparatus according to the fourth embodiment
  • FIG. 7 is a cross-sectional view taken along the line BB in FIG. 6
  • FIG. 8 is a cross-sectional view taken along the line CC in FIG. 10 is a cross-sectional view taken along the line EE of FIG.
  • the lighting device 1 ⁇ / b> D according to the fourth embodiment has a U-shaped planar shape, and the light emitting diode 1 is set on one end face thereof.
  • the linear portion of the groove portion 5 is similar to the illumination devices 1A to 1C according to the first to third embodiments, as the distance from the light incident surface 6 increases, as shown in FIG.
  • the plate is formed to have a large thickness.
  • the curved portion as shown in FIG. 9, in the portion facing the light incident surface 6, the light L that has propagated to the first light guide portion 3 is caused by the straightness of the light. It becomes easy to propagate to the 2nd light guide part 4 through.
  • the plate thickness of the groove portion 5 at the portion facing the light incident surface 6 is reduced, and the amount of light L transmitted to the second light guide portion 4 through the groove portion 5 is reduced. This prevents excessively high luminance at the curved portion and maintains the uniformity of the luminance of the light exit surface.
  • or FIG. 11 and 12 are plan views of the illumination device according to the fifth embodiment
  • FIG. 13 is a cross-sectional view of an electronic apparatus showing an application example of the illumination device according to the fifth embodiment.
  • the lighting device 1E has an oval planar shape, and a plurality of the light guides 3 (examples of FIGS. 11 and 12).
  • four light emitting diodes 1 are set.
  • 11 shows an example in which the groove portion 5 and the second light guide portion 4 are arranged on the outer periphery of the first light guide portion 3
  • FIG. 12 shows the groove portion 5 and the second light guide portion 4 on the inner periphery of the first light guide portion 3.
  • As the light-emitting diode 1 a full-surface light-emitting type or a double-sided light-emitting type (a single-sided light-emitting type may be used) can be used.
  • the groove portion 5 has a straight portion or a portion having a shape close to a straight line, and the thickness of the light guide plate 2 in the groove portion 5 increases as the distance from the light incident surface 6 increases.
  • the thickness of the groove portion 5 in the portion facing the light emitting surface of the light emitting diode 1 is reduced, and the light L propagated to the second light guide portion 4 through the groove portion 5 is reduced. Reduce the amount of light. Thereby, the uniformity of the brightness
  • the other light guide plate 16 is a light guide that guides the light emitted from the lighting device 1E to the gap. As described above, when the gap between the input / output device 12 and the housing 13 is illuminated, the periphery of the input / output device 12 can be emphasized with light, so that the design can be improved.
  • FIG. 14 is a plan view of a lighting apparatus according to the sixth embodiment
  • FIG. 15 is a cross-sectional view taken along the line FF of FIG.
  • the lighting device 1 ⁇ / b> F emits a plurality of lights (two in the example of FIGS. 14 and 15) along the longitudinal direction of the first light guide unit 3.
  • the diode 1 is set. About others, it is the same as that of the illuminating device 1B which concerns on 2nd Embodiment.
  • the illumination device 1F of the present example since the plurality of light emitting diodes 1 are set along the longitudinal direction of the first light guide 3, the luminance of the light exit surface 7 can be increased and the uniformity thereof can also be improved. And unlike the illuminating device (refer FIG.
  • FIG. 16 is a plan view of a lighting device according to the seventh embodiment
  • FIG. 17 is a cross-sectional view taken along the line GG of FIG.
  • the lighting device 1 ⁇ / b> G is characterized in that a double-sided light emitting diode 1 is set in the first light guide 3. About others, it is the same as that of the illuminating device 1B which concerns on 2nd Embodiment.
  • the illumination device 1F of the present example since the double-sided light emitting diode 1 is set in the first light guide 3, it is possible to further reduce the set number of the light emitting diodes 1 and further reduce the manufacturing cost. Thus, the power consumption can be further reduced.
  • FIGS. 18 is a plan view of the lighting apparatus according to the eighth embodiment
  • FIG. 19 is a cross-sectional view taken along the line HH of FIG. 18
  • FIG. 20 is a cross-sectional view taken along the length direction of the first groove
  • FIG. FIG. 22 is a sectional view showing the depth dependency of the groove shape
  • FIG. 23 is a sectional view along the length direction of the third groove portion
  • FIG. 24 is a length direction of the fourth groove portion.
  • 25 is a sectional view taken along the length direction of the fifth groove
  • FIG. 26 is an exploded perspective view of a mobile phone to which the illumination device according to the present invention is applied
  • FIG. 27 is an illuminated state of the mobile phone. It is principal part sectional drawing which shows these.
  • a lighting device 1H according to the eighth embodiment is applied to, for example, illumination of a peripheral portion of a liquid crystal display panel provided in a mobile phone, and the light guide plate 2 has round corners as shown in FIG. It is formed in a substantially rectangular frame shape.
  • a light emitting diode setting hole 21 is formed at a substantially central portion of the long side, and its wall surface is a light incident surface 6.
  • teardrop-shaped bolt through holes 22 are formed at the four corners with their end portions facing the long sides.
  • ribs 23 for fixing the light guide plate 2 to other members are formed at required positions on the inner periphery.
  • the first to fifth groove portions 5a ⁇ 5 for forming a required light guide portion. 5e is formed in the required arrangement.
  • the illumination light is also emitted from the portions corresponding to the grooves 5a to 5e of the light guide plate 2. Can be taken out and can be adapted to various shapes of illumination parts.
  • the first groove portion 5 a defines a first light guide portion 3 that propagates light incident from the light emitting diode 1 in the length direction of the light guide plate 2 and a second light guide portion 4 having a light exit surface 7.
  • the one end portion is connected to the end portion of the bolt through hole 22 formed in a teardrop shape, and the other end portion is at a position slightly away from the light incident surface 6. Be placed.
  • the first groove 5 a is formed with a through hole at the end on the light incident surface 6 side, and the other part is formed with a recess of a certain depth until reaching the bolt through hole 22. .
  • the depth of the dent should be about 80% of the total thickness of the light guide plate 2 in consideration of the light guide efficiency between the first light guide portion 3 and the second light guide portion and the rigidity reduction of the light guide plate 2. Is desirable.
  • the wall surface of the bolt through hole 22 formed in the teardrop shape can be used as a reflection surface for guiding light. Therefore, the width of the light guide portion can be increased and the amount of light that can be propagated can be increased as compared with the case where the groove portion is formed by avoiding the bolt through hole 22.
  • the second groove portion 5b defines the first light guide portion 3 and the third light guide portion 24, and is composed of a straight portion and a curved portion that follows, and one end of the curved portion is guided.
  • the light plate 2 reaches the short side, and one end of the straight line portion is disposed at a position slightly away from the light incident surface 6.
  • the second groove portion 5 b is formed with a through hole at the end of the linear portion on the light incident surface 6 side, and the other portion of the linear portion has a certain depth until reaching the bolt through hole 22. It is formed with a depression, and the curved portion is formed with a through hole.
  • the depth of the recess is formed to be about 80% of the total thickness of the light guide plate 2 as in the first groove portion 5a.
  • the third light guide part 24 defined by the second groove part 5b is not a constant width, but the width of the light guide part corresponding to the curved part is the width of the light guide part corresponding to the straight part. It is narrower than.
  • the third light guide 24 is disposed on the opposite side of the second light guide 4 via the first light guide 3, the light propagating through the third light guide 24 has the light exit surface 7. 2 It is difficult to be guided to the light guide section 4 and the light quantity is not easily lowered even if the distance from the light incident surface 6 is increased. Therefore, the illuminance of the part away from the light source can be increased. Moreover, since the width of the third light guide part 24 in the curved part is narrower than the width of the third light guide part 24 in the straight part, the light guide loss in the curved part can be reduced, and the tip of the curved part can be reduced.
  • the necessary amount of light can be propagated, and the amount of light that can be used in the straight portion in front of the light can be relatively increased, so that the illumination portion can be uniformly illuminated as a whole. Furthermore, if the curved portion of the second groove portion 5b is formed with a through hole, the amount of light passing through the second groove portion 5b from the third light guide portion 24 to the first light guide portion 3 can be minimized, and the curved portion can be reduced. The light guide loss accompanying the formation can be minimized. Further, when the groove portions 5a to 5e are formed by laser processing, as shown in FIG. 22, the inclination of the processed surface increases as the groove depth decreases, but the processed surface of the through hole can be formed to be nearly vertical. Therefore, the light guide loss can be suppressed also from this point.
  • the third groove portion 5c is formed in order to make the light quantity distribution of the first light guide portion 3 uniform, and includes only a straight portion.
  • the length is much shorter than that of the first groove portion 5 a and the second groove portion 5 b, and is formed at a position slightly away from the light incident surface 6.
  • the third groove portion 5c is formed with a through hole at the end on the light incident surface 6 side, and a recess with a constant depth until the other portion reaches the other end.
  • the depth of the dent should be about 80% of the total thickness of the light guide plate 2 in consideration of the light guide efficiency between the first light guide portion 3 and the second light guide portion and the rigidity reduction of the light guide plate 2. Is desirable.
  • the one end of the first to third grooves 5a to 5c is arranged at a position slightly away from the light incident surface 6, the one end of the first to third grooves 5a to 5c and the light incident surface 6 are arranged. Since the space portion 25 is formed between the light incident surface 6 and the light incident from the light incident surface 6, the light enters the light guide portions 3, 4, 24 through the space portion 25. The luminance unevenness at the 24 boundary portions can be suppressed. In addition, since the amount of light incident on each light guide 3, 4, 24 can be made uniform, the brightness on the light exit surface can be made uniform over a wide range without strictly adjusting the depth of the groove in the length direction. Can do.
  • first to third grooves 5a to 5c are formed on the light incident surface 6 side with the through holes, the luminance in the vicinity of the light incident surface is not excessively increased, and the light output surface 7 is formed over the entire circumference of the light guide plate 2. Can be made uniform.
  • the fourth groove portion 5d guides the light propagated through the first light guide portion 3 to the back surface side of the bolt through hole 22 when viewed from the light incident surface 6 side, and is formed in an arc shape. It is arranged along the curved surface. As shown in FIG. 24, the fourth groove 5d is formed with only a through hole. Thus, when the 4th groove part 5d is formed in the back side of the bolt through-hole 22 seeing from the light-incidence surface 6 side, the light which propagated the 1st light guide part 3 is efficiently sent to the back side of the bolt through-hole 22 Therefore, the lack of brightness in the portion can be solved.
  • the fifth groove portion 5e is for suppressing light leakage from the rib 23, and is configured with only a straight portion, and is formed at a boundary portion between the rib 23 and the third light guide portion 24. As shown in FIG. 25, the fifth groove 5e is formed with a recess having a constant depth. The depth of the recess is preferably about 80% of the total thickness of the light guide plate 2 in consideration of light blocking efficiency and a reduction in rigidity of the light guide plate 2. As described above, when the fifth groove 5e is formed at the boundary between the rib 23 and the third light guide 24, the light propagating in the third light guide 24 becomes difficult to propagate to the rib 23. Therefore, the rib 23 is provided. It is possible to suppress the waste of light due to the fact.
  • the light guide plate 2 includes the third to third light guides 3 and 4 defined by the first and second groove portions 5a and 5b. Since the five groove portions 5c, 5d, and 5e are formed, it is possible to strictly adjust the light amount distribution in the formation portions of these groove portions and the peripheral portions thereof. Further, since the light quantity distribution in the light guide plate 2 is strictly adjusted by the shape and arrangement of the grooves 5a to 5e, the contribution ratio of the groove depth to the light quantity distribution is relatively lowered, and the groove depths of the grooves 5a to 5e are reduced.
  • the straight portions of the grooves 5a to 5e are configured so as not to form through holes except for the vicinity of the light incident surface 6, it is possible to effectively suppress the propagation of light at necessary portions and to reduce the grooves 5a to 5e. A reduction in rigidity of the light guide plate 2 due to the formation of 5e can be minimized, and a light guide plate that can be easily handled can be obtained.
  • five groove portions are formed. However, more groove portions are formed, and another light guide portion is formed between the third light guide portion and the first light guide portion. May be. Moreover, a groove part may be further formed in the third light guide part to divide it into a plurality of light guide parts. With these configurations, the amount of light emitted according to the distance can be made uniform, or the illuminance of a portion further away from the light source can be increased.
  • a urethane sheet having a required thickness is prepared as a raw material sheet.
  • a carbon dioxide laser capable of switching the output level between two levels, a high level and a low level is prepared as a laser device for laser processing the raw material sheet.
  • the output level of the carbon dioxide laser is switched to a high level, and the outer shape of the light guide plate 2 and the portion formed of the through holes in the grooves 5a to 5e are formed.
  • the output level of the carbon dioxide laser is switched to a low level, and a portion of the grooves 5a to 5e having a depth equal to or smaller than the thickness of the urethane sheet is formed.
  • a light guide plate having a required groove portion can be manufactured simply by switching the output level of the laser device to two stages, so that compared to the case of manufacturing a light guide plate having a multi-stage groove depth.
  • the light guide plate can be easily manufactured.
  • a urethane sheet is used as the raw material sheet, a heat-affected portion due to laser irradiation is unlikely to occur, and the removal processing of the heat-affected portion can be eliminated. Therefore, a highly accurate light guide plate can be manufactured easily and at low cost.
  • a polycarbonate sheet having a required thickness is prepared as a raw material sheet.
  • a carbon dioxide laser capable of switching the output level between two levels, a high level and a low level is prepared as a laser device for laser processing the raw material sheet.
  • the output level of the carbon dioxide laser is switched to a high level to form the outer shape of the light guide plate and the portion formed of the through holes in the grooves 5a to 5e.
  • the output level of the carbon dioxide laser is switched to a low level, and a portion of the grooves 5a to 5e having a depth equal to or less than the thickness of the polycarbonate sheet is formed.
  • the thermally altered portion generated by laser processing is removed by chemical treatment.
  • a laminated sheet of a polycarbonate sheet and an acrylic sheet having a required total thickness is prepared as a raw material sheet.
  • a carbon dioxide laser capable of switching the output level between two levels, a high level and a low level, is prepared as a laser device for laser processing the raw material sheet.
  • the output level of the carbon dioxide laser is switched to a high level, and a laser beam is irradiated from the acrylic sheet side of the laminated sheet to form the outer shape of the light guide plate and the portion formed of the through holes in the grooves 5a to 5e.
  • the output level of the carbon dioxide laser is switched to a low level, and a laser beam is irradiated from the acrylic sheet side of the laminated sheet to form a portion where the depth of the grooves 5a to 5e is equal to or less than the thickness of the laminated sheet.
  • the thermally altered portion generated in the polycarbonate sheet by laser processing is removed by chemical treatment.
  • the acrylic sheet functions as a clad material for the light guide section made of a polycarbonate sheet, it is possible to manufacture a light guide plate that can exhibit high light guide performance regardless of the optical conditions of the application location.
  • a hot press method for obtaining a desired shape by pressing a softened resin sheet while heating it with a mold, or a shape is formed by pouring a thermosetting or ultraviolet curable resin into a mold. It can be produced by a method such as imprinting or injection molding.
  • the mobile phone of the present example is mounted with a shallow dish-shaped base 31 made of plastic injection-molded product, a light guide plate 2, a light emitting diode 1, an earphone, a camera, a required connector, and the like.
  • the light-emitting diode 1 is housed in a light-emitting diode setting hole 21 provided in the light guide plate 2, and the light-emitting diode 1 and the light guide plate 2 constitute an illuminating device 1 H according to the eighth embodiment.
  • the base 31 is provided with a wall 31a around the entire circumference, and the light guide plate 2 is placed in the base 31 so that its outer peripheral surface abuts against the inner surface of the wall 31a.
  • a light guide 35 a for guiding light emitted from the lighting device 1 H to a required illumination unit is provided on the inner surface of the bezel 35, and the tip of the light guide 35 a is connected to the light exit surface 7 of the light guide plate 2. It is arranged opposite to the corresponding part.
  • a light shielding film 37 for restricting the illumination range is formed on the light guide 35a. Therefore, the cellular phone of this example can illuminate the outer peripheral portion of the liquid crystal display panel 33 in a ring shape with a constant width.
  • the width of the light exit surface 7 formed in the illumination device 1H is preferably as narrow as possible.
  • the illumination unit in order to further improve the design of the illumination unit, it is required not only to illuminate the illumination unit with monochromatic light but also with light with color gradation applied.
  • a means for illuminating the illumination part with light with a color gradation for example, an ink jet or the like prints a color gradation according to a desired light emission pattern on the illumination part, and incident white light from the light source into the light guide Possible ways to do this.
  • a gradation of color corresponding to the light emission pattern has to be printed on the illumination unit, so that there is a problem that the manufacturing process of the electric device and the display device is complicated and the cost is increased.
  • the lighting device 1J according to the ninth embodiment includes a light guide plate 101 having a transparent resin material and a planar shape formed in a quadrangular shape, and three single-sided light emitting devices disposed on the end face of the light guide plate 101.
  • the light emitting diodes 102, 103, and 104 of the type and a clad film 105 disposed on the lower surface of the light guide plate 101 are configured.
  • the clad film 105 is formed of a resin material having a light refractive index lower than that of the light guide plate 101.
  • each of the light guide paths 112, 113, 114 enters through the portion where the light guide plate 101 of the groove portion 106 exists, and exits from the upper surface.
  • the light guides 112, 113, and 114 are referred to as light entrance light guides, and the light guide 111 is referred to as a light exit light guide.
  • the grooves 106, 107, and 108 are formed such that the depth d, in other words, the thickness t of the light guide plate 101 increases or decreases stepwise at each position in the length direction.
  • the thickness change of the light guide plate 101 in the groove portions 106, 107, and 108 has a step structure with substantially equal intervals, and a portion having no plate thickness, that is, a portion where a through hole is opened is also formed. Has been.
  • the plate thickness change of the light guide plate 101 in the grooves 106, 107, 108 is a step structure, the processing of the plate thickness change can be facilitated and the mirror surface degree of the processed surface can be increased, so that a high-performance lighting device Can be manufactured at low cost.
  • the plate thickness t of the light guide plate 101 is small, the amount of light leaking from the light guides 112, 113, 114 to the light guide 111 is small, and conversely, the plate thickness t of the light guide plate 101 is large. Then, the amount of light leaking from the light entrance light guides 112, 113, 114 to the light exit light guide 111 increases.
  • the light quantity of the light leaked into the light guide 111 for light emission from the light guide 112, 113, 114 for light input becomes zero.
  • the light emission pattern of light emitted from the light exit surface of the light output light guide 111 is adjusted by appropriately adjusting the amount of light leaking from the light input light guides 112, 113, 114 to the light output light guide 111. can do.
  • the light guide plate 101 is an imprint molding method, that is, a method in which a transparent resin in a molten state is stretched between a mold die on which a reverse pattern of the light guide plate 101 is formed and the clad film 105, and then the mold die is peeled off. Can be created. According to this method, it is possible to produce a very thin light guide plate that is difficult to produce by injection molding.
  • a red light emitting diode 102, a green light emitting diode 103, and a blue light emitting diode 104 are used, respectively.
  • red light and red and green mixed color light are emitted from a position close to the setting position of the light emitting diodes 102, 103, and 104 on the light output surface of the light output light guide 111.
  • Red strong light, red and green mixed light, red and green are almost equivalent light, red and green mixed light, green strong light, green light, green and blue mixed light
  • the groove portion 106 emits strong green light, mixed light of green and blue, light substantially equivalent to green and blue, and mixed light of green and blue, strong blue light, and blue light in this order.
  • 107 and 108 it is particularly desirable to adjust the thickness t of the light guide plate 101. In this way, the light path length from the light emitting diodes 102, 103, 104 to the light output light guides 111 through the light input light guides 112, 113, 114 can be made the shortest.
  • the groove configuration can be simplified and the cost of the lighting device can be reduced.
  • the illuminating device 1J of this example uses the light emitting diodes 102, 103, and 104 as light sources, it can be made thin and power consumption can be reduced.
  • the red light emitting diode 102, the green light emitting diode 103, and the blue light emitting diode 104 are used as the light emitting diodes 102, 103, and 104.
  • the gist of the present invention is limited to this.
  • the combination of light emitting diodes that emit light of other colors is also possible.
  • the number of light emitting diodes is not limited to “3”, and may be any number of 2 or more.
  • a light emitter other than the light emitting diode can be used as the light source.
  • the number of the light outgoing guides 111 is not limited to one, and may be two or more.
  • FIG. 31 shows a lighting device 1K according to the tenth embodiment.
  • the lighting device 1K according to the tenth embodiment is characterized in that the planar shape of the light guide plate 101 is annular.
  • the lighting device 1K of this example has all the side surfaces in which a red light emitting diode element 102, a green light emitting diode element 103, and a blue light emitting diode element 104 are integrally packaged as a light source.
  • a light emitting module 122 of a light emitting type or a double side emitting type is used, and the light emitting module 122 is disposed in a light source setting recess 123 formed in the light guide plate 101.
  • Reference numeral 124 in FIG. 31 indicates a circuit board on which the light emitting module 122 is mounted.
  • symbol is attached
  • the planar shape of the light guide plate 101 is annular, it can be applied to, for example, a purpose of selectively illuminating the outer peripheral edge of the display surface in the liquid crystal display device.
  • the design of the equipment can be improved.
  • the light emitting module 122 in which the red light emitting diode element 102, the green light emitting diode element 103, and the blue light emitting diode element 104 are integrally packaged and used as a light source is used as a light source. By disposing it so as to face 114, the mounting process is completed once and the mounting cost is reduced.
  • the light emitting module 122 is disposed in the light source setting recess 123 formed in the light guide plate 101, the light source can be easily attached to the light guide plate 101, and the light entrance light guide paths 112, 113, 114 are provided. The incident efficiency of light on the light can be increased, and the luminance of the light exit surface can be increased.
  • planar shape of the light guide plate 101 can be appropriately changed according to the application, and in addition to a linear shape and an annular shape, for example, a U-shaped shape or an S-shaped shape may have a shape having a curved portion at a part thereof. . Thereby, it is applicable to various uses.
  • FIG. 33 shows a lighting apparatus 1M according to the eleventh embodiment.
  • the illuminating device 1M according to the eleventh embodiment emits light L propagating through the light incident light guides 112, 113, 114 to the light guide plate 101 through the grooves 106, 107, 108.
  • a prism 125 that leads into the light guide path 111 is formed.
  • symbol is attached
  • the light guide plate 101 is formed with the prism 125 that guides the light L propagating through the light entrance light guides 112, 113, and 114 to the light exit light guide 111 side.
  • the light L can be smoothly propagated from the inside 112, 113, 114 to the light guide 111 for light output, the light use efficiency can be increased, and the luminance of the light output surface can be increased.
  • the light incident surface for entering the light emitted from the light source into the light guide and the light exit surface for emitting the light propagated in the light guide toward the outside are provided.
  • a plurality of light entrance light guides and at least one light guide light guide are arranged in parallel with each other through the groove part, and the groove part is adjusted to the groove part by adjusting the depth of the groove part.
  • each light Since the amount of light reaching the light guide for light emission via the light source is adjusted, when a light source with a different color of emitted light is arranged opposite to the light entrance surface of each light guide for light input, each light is individually The light can be guided to the light guide for outgoing light, and the mixed light of each light can be guided to the light guide for outgoing light. Therefore, the light output surface of the light guide for light output can be emitted with a light emission pattern with a color gradation without special printing on the light guide plate.
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG. It is the side view seen from the light-incident surface side of the illuminating device which concerns on 1st Embodiment. It is a top view of the illuminating device which concerns on 2nd Embodiment. It is a top view of the illuminating device which concerns on 3rd Embodiment. It is a top view of the illuminating device which concerns on 4th Embodiment.
  • FIG. 7 is a sectional view taken along line BB in FIG.
  • FIG. 7 is a cross-sectional view taken along the line CC of FIG. FIG.
  • FIG. 7 is a DD cross-sectional view of FIG. 6.
  • FIG. 7 is a cross-sectional view taken along line EE in FIG. 6. It is a top view of the illuminating device which concerns on 5th Embodiment. It is a top view of the illuminating device which concerns on the modification of 5th Embodiment. It is sectional drawing of the electronic device which shows the application example of the illuminating device which concerns on 5th Embodiment. It is a top view of the illuminating device which concerns on 6th Embodiment.
  • FIG. 15 is a sectional view taken along line FF in FIG. 14. It is a top view of the illuminating device which concerns on 7th Embodiment. It is GG sectional drawing of FIG.
  • FIG. 1st groove part It is sectional drawing along the length direction of the 1st groove part. It is sectional drawing along the length direction of the 2nd groove part. It is sectional drawing which shows the depth dependence of groove shape. It is sectional drawing along the length direction of the 3rd groove part. It is sectional drawing along the length direction of the 4th groove part. It is sectional drawing along the length direction of the 5th groove part. It is a disassembled perspective view of the mobile telephone to which the illuminating device concerning this invention is applied. It is principal part sectional drawing which shows the illumination state of a mobile telephone.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention porte sur un dispositif d'éclairage, comprenant une plaque de guidage de lumière qui est apte à produire une qualité d'éclairage avec une luminance uniforme et élevée avec un petit nombre de sources de lumière. De façon spécifique, un dispositif d'éclairage (1A) est configuré avec une diode électroluminescente (1) jouant le rôle de source de lumière, et une plaque de guidage de lumière (2) constituée d'un matériau en résine transparente. La plaque de guidage de lumière (2) est constituée d'une première partie de guidage de lumière (3), une seconde partie de guidage de lumière (4) et une partie de rainure (5) formée entre la première partie de guidage de lumière (3) et la seconde partie de guidage de lumière (4), et a une forme plane quadrilatérale. Une face d'extrémité de la première partie de guidage de lumière (3) dans la direction longitudinale forme une surface d'entrée de lumière (6), et la surface de sortie de lumière de la diode électroluminescente (1) est agencée de façon à faire face à la surface d'entrée de lumière (6). La seconde partie de guidage de lumière (4) est formée parallèlement à la première partie de guidage de lumière (3), et une surface principale de la seconde partie de guidage de lumière (4) forme une surface de sortie de lumière (7). La partie de rainure (5) est formée de telle sorte que plus la distance à partir de la surface d'entrée de lumière (6) est grande, plus l'épaisseur de plaque de la plaque de guidage de lumière (2) est épaisse.
PCT/JP2009/069449 2008-11-17 2009-11-16 Dispositif d'éclairage et procédé pour fabriquer une plaque de guidage de lumière utilisée dans celui-ci WO2010055940A1 (fr)

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CN200980144034.5A CN102203500B (zh) 2008-11-17 2009-11-16 照明装置以及用于其中的导光板的制造方法
JP2010537826A JP5281095B2 (ja) 2008-11-17 2009-11-16 照明装置及びこれに用いる導光板並びにこの導光板の製造方法

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JP2008293552 2008-11-17
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CN103443671A (zh) * 2011-01-25 2013-12-11 皇家飞利浦有限公司 具有带有由狭缝划界的多个光导的透明主体的马赛克照明设备
CN103443671B (zh) * 2011-01-25 2016-06-22 皇家飞利浦有限公司 具有带有由狭缝划界的多个光导的透明主体的马赛克照明设备
US8845169B2 (en) 2011-08-24 2014-09-30 Panasonic Corporation Illumination apparatus
WO2017183291A1 (fr) * 2016-04-22 2017-10-26 アルプス電気株式会社 Dispositif d'éclairage

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