WO2012114553A1 - Elément de guidage de lumière et dispositif émetteur de lumière le comportant - Google Patents

Elément de guidage de lumière et dispositif émetteur de lumière le comportant Download PDF

Info

Publication number
WO2012114553A1
WO2012114553A1 PCT/JP2011/066450 JP2011066450W WO2012114553A1 WO 2012114553 A1 WO2012114553 A1 WO 2012114553A1 JP 2011066450 W JP2011066450 W JP 2011066450W WO 2012114553 A1 WO2012114553 A1 WO 2012114553A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
guide member
reflective
light guide
reflection
Prior art date
Application number
PCT/JP2011/066450
Other languages
English (en)
Japanese (ja)
Inventor
小泉　秀樹
田中　敏裕
Original Assignee
パナソニック株式会社
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 パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2012114553A1 publication Critical patent/WO2012114553A1/fr

Links

Images

Classifications

    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • 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 is disposed between opposed light sources, guides light incident from incident surfaces on both end faces, and emits light from an exit surface provided to intersect the incident surface, and
  • the present invention relates to a light emitting device including the same.
  • Patent Document 1 discloses a rod-shaped light guide that emits light from a light emitting unit disposed at each of both ends in the longitudinal direction from the upper surface of one side surface in the longitudinal direction.
  • a scattering dot pattern for irregularly reflecting light introduced into the rod-shaped light guide is formed on the bottom surface of the top surface of the rod-shaped light guide opposite to the exit surface.
  • the rod-shaped light guide having the scattering dot pattern as described above has a problem that light is irregularly reflected and it is relatively difficult to improve the directivity of the reflected light.
  • a scattered dot pattern generally needs to be formed by printing a white paint or the like, there is a problem that the manufacturing process becomes complicated.
  • the present invention has been made in view of the above circumstances, and provides a light guide member capable of improving the directivity of light emitted from the emission surface while having a simple structure, and a light emitting device including the same. It is an object.
  • a light guide member according to the present invention is disposed between opposed light sources, guides light incident from incident surfaces on both end surfaces, and intersects the incident surface.
  • a light guide member that emits from the exit surface provided in the above manner, along a direction orthogonal to the facing direction of the light source, on a reflective surface provided on the opposite side of the exit surface so as to intersect the entrance surface A large number of prismatic reflective grooves are provided along the opposing direction and symmetrically with respect to the center in the opposing direction.
  • the reflection concave groove of the reflection surface may be configured to reflect the light from the incident surface toward the emission surface so as not to diffuse along the facing direction.
  • the reflection concave groove of the reflection surface may be configured to reflect light from the incident surface in a direction in which the light is diffused obliquely along the facing direction.
  • a light-emitting device includes the light guide member according to the present invention and a light source disposed opposite to both end faces of the light guide member. To do.
  • the reflective ditch has a length direction.
  • the length direction of the reflective ditch is defined as a direction orthogonal to the facing direction of the light source.
  • the reflective ditch has a cross section along a direction orthogonal to the length direction.
  • the cross section of the reflective ditch is formed in a V shape.
  • the cross section of the reflective ditch has a triangular shape, and the reflective ditch is preferably formed in a V shape.
  • the light guide member according to the present invention and the light emitting device including the light guide member are configured as described above. Although the structure is simple, the directivity of light emitted from the emission surface can be improved.
  • (A), (b) shows typically an example of the light-emitting device provided with the light guide member based on one Embodiment of this invention, (a) is a schematic plan view, (b) is schematic. It is a front view. (A), (b) shows typically an example of the light-emitting device provided with the light guide member which concerns on other embodiment of this invention, (a) is a schematic plan view, (b), It is a schematic front view.
  • FIG. 1 is a conceptual explanatory diagram for explaining an example of a light guide member according to the first embodiment and a light emitting device including the light guide member.
  • the light emitting device 1 includes a light guide member 10 and an LED (light emitting diode) as a light source disposed opposite to both end faces 11 of the light guide member 10.
  • the light source units 2 and 2 are provided.
  • the light emitting device 1 is provided with a casing for housing the light guide member 10 and the light source units 2 and 2, a translucent cover member, and the like.
  • the light source units 2 and 2 include a substrate on which electronic components such as LEDs and connectors as light emitting elements serving as a light source are mounted, a substrate case that accommodates the substrate, and the like.
  • the LED may be of a shell type in which a light emitting element (LED element) is sealed with a resin or the like, or may have a chip shape, or a surface mount type. Good. Moreover, it is not restricted to what provided single LED, It is good also as an aspect which arranges several LED in parallel or arranges LED which radiate
  • the light guide member 10 has a long, substantially rectangular column shape, and both end surfaces in the longitudinal direction are incident surfaces 11, 11, and the light source units 2, 2 are respectively provided on the incident surfaces 11, 11. Provided.
  • the light guide member 10 has an elongated shape along the facing direction of the light source units 2 and 2.
  • the facing direction is defined as a direction in which a plurality of light sources are facing each other.
  • the light guide member 10 is integrally formed from a light-transmitting or transparent resin material such as acrylic resin or polycarbonate resin, or a material having a high refractive index such as transparent glass.
  • an exit surface 12 is provided so as to intersect the entrance surfaces 11, 11, and a reflection surface 13 is provided on the opposite side of the exit surface 12 so as to intersect the entrance surfaces 11, 11. That is, the emission surface 12 and the reflection surface 13 are provided so as to be substantially parallel.
  • the remaining side surfaces 15 and 15 provided so as to intersect the incident surface 11 are also reflecting surfaces that reflect the light to be guided.
  • the light guide member 10 guides the light emitted from the light source units 2 and 2 and incident from the incident surfaces 11 and 11 by the reflecting surfaces 13, 15 and 15 along the longitudinal direction. It is a so-called edge light structure that emits from the exit surface 12 while shining.
  • a large number of prismatic reflective grooves 14 are provided on the reflective surface 13 of the light guide member 10 according to the present embodiment. These reflective grooves 14 are formed along a direction (both side surfaces 15 and 15 directions) orthogonal to the longitudinal direction of the light guide member 10 (opposite direction of the light source units 2 and 2) and along the longitudinal direction. It is provided at intervals. That is, these reflective grooves 14 are formed along a direction parallel to the incident surface 11 and are provided parallel to each other.
  • these reflecting grooves 14 are provided substantially symmetrically with respect to the longitudinal center line 3. That is, the reflective grooves 14 are provided in a substantially line symmetrical manner with the longitudinal center line 3 as the axis of symmetry.
  • the reflecting groove 14 has a substantially V-shaped groove shape as shown in FIG.
  • the reflective concave groove 14 is illustrated in a large size.
  • the reflective groove 14 is fine, for example, the groove width and the groove depth are of the order of micro order or millimeter order (FIG. 2).
  • the pitch at which the reflective concave grooves 14 are provided at intervals along the longitudinal direction is also on the order of micro order or millimeter order.
  • these reflective grooves 14 are configured to reflect the light from the incident surfaces 11 and 11 toward the emission surface 12 so as not to diffuse along the longitudinal direction.
  • the reflection concave grooves 14 are configured to reflect light emitted from the emission surface 12 toward the emission surface 12 so as to be close to a direction orthogonal to the emission surface 12.
  • the angle may be in the range of about 80 to 100 degrees.
  • the angle formed by the reflective surface 13 where the reflective groove 14 is not provided and the groove reflective surface 14a of the reflective groove 14 where light is incident and reflected is defined as the reflective groove. What is necessary is just to set according to the incident angle of the light which injects into 14, the refractive index of the said light guide member 10, etc. FIG.
  • the incident angle may be determined according to the refractive index, the dimension from the reflecting surface 13 to the exit surface 12, the dimension between both incident surfaces 11, 11, the dimension between both side surfaces 15, 15, and the like. .
  • the angle formed between the reflecting surface 13 where the reflecting groove 14 is not provided that is, the plane that intersects the incident surface and is parallel to the emitting surface 12 and the groove reflecting surface 14a of the reflecting groove 14, An example of about 120 to 140 degrees is shown.
  • the light guide member 10 configured as described above, as conceptually shown in FIG. 1B, light is guided while being repeatedly reflected in the light guide member 10, and is incident on the groove reflection surface 14 a of the reflective groove 14. The emitted light is reflected with its diffusion in the longitudinal direction being suppressed. Then, the light is emitted from the emission surface 12 in a direction close to a direction orthogonal to the emission surface 12.
  • the formation of the reflective grooves 14 is such that the shape of the reflective grooves 14 is formed on the transfer surface (cavity surface, slide core surface) of the mold when the light guide member 10 is formed by, for example, injection molding. It may be formed by forming a pattern corresponding to the above. Or after forming in a substantially prismatic shape, you may make it form the reflective ditch
  • the directivity of light emitted from the emission surface 12 can be improved while having a simple structure.
  • a large number of prismatic reflective grooves 14 along the direction orthogonal to the facing direction of the light source units 2 and 2 are formed on the reflecting surface 13 of the light guide member 10 at intervals along the facing direction. They are provided substantially symmetrically with respect to the direction center 3. Therefore, the directivity of light emitted from the emission surface 12 can be improved.
  • the light guided while being reflected in the light guide member 10 can be reflected in the direction along the opposing direction by the reflective grooves 14, thereby suppressing reflection in the direction orthogonal to the opposing direction. Therefore, the directivity of the light emitted from the emission surface 12 can be improved.
  • the light emitted from the emission surface 12 is superimposed along the facing direction, and the illuminance on the irradiation target surface can be relatively improved.
  • the reflection concave grooves 14 are provided substantially symmetrically across the center 3 in the opposing direction, the light source units 2 and 2 from the light source units 2 and 2 arranged opposite to each other are improved while improving the directivity along the opposing direction. Light distribution control such as superimposing and uniforming light effectively can be realized with a simple structure. That is, the amount of light emitted from the emission surface 12 tends to decrease in a portion far from the light source unit 2.
  • the reflection concave grooves 14 are provided in a substantially symmetrical shape across the substantially center 3 in the opposing direction of the light source units 2 and 2, so that the light is incident from the respective incident surfaces 11 and 11 and gradually emitted and attenuated. The light to be overlapped can be overlapped at the substantially central portion in the opposing direction, and insufficient illuminance at the central portion can be suppressed.
  • the reflection pattern is formed by the reflection concave grooves 14 formed in the light guide member 10, a scattering dot is formed as in the prior art, or the reflection pattern is configured by another member such as a diffusion plate or a reflection plate. Manufacturing is relatively easy as compared to the above, and a simple structure can be achieved.
  • the reflection concave groove 14 is configured to reflect the light from the incident surface 11 toward the output surface 12 so as not to diffuse along the facing direction. Therefore, the diffusion of the light emitted from the emission surface 12 in the opposite direction can be relatively suppressed, and the illuminance on the irradiation target surface can be improved even when the irradiation target is far away.
  • the reflective ditch 14 has a length direction.
  • the length direction of the reflective ditch 14 is defined as a direction orthogonal to the facing direction of the light source. Further, the length direction of the reflective ditch 14 is along the emission surface 12.
  • the reflective groove 14 has a cross section along a direction orthogonal to the length direction of the reflective groove 14. The cross section of the reflective ditch 14 is formed in a V shape.
  • the directivity of the light emitted from the emission surface 12 can be improved.
  • the light emitted from the emission surface 12 is superimposed along the facing direction. Therefore, the illuminance on the irradiation target surface can be relatively improved.
  • the cross section of the reflective ditch 14 has a triangular shape, whereby the reflective ditch 14 is formed in a V shape. Therefore, the illuminance on the irradiation target surface can be relatively improved.
  • the cross section of the reflective ditch 14 may be trapezoidal. That is, the cross section of the reflective ditch 14 may have a triangular shape or a trapezoidal shape. Thereby, the reflective ditch
  • the reflective ditch 14 has an inner surface.
  • the inner surface of the reflective concave groove 14 is defined as a groove reflective surface 14a.
  • the angle formed by the surface parallel to the emission surface 12 and the groove reflecting surface 14a of the reflecting groove 14 is set to be 120 degrees or more and 140 degrees or less. Therefore, the illuminance on the irradiation target surface can be relatively improved.
  • FIG. 2 is a conceptual explanatory diagram for explaining an example of the light guide member according to the second embodiment and a light emitting device including the light guide member.
  • the configuration of the reflective surface 13A of the light guide member 10A is different from that of the first embodiment.
  • a large number of reflecting grooves 14A provided on the reflecting surface 13A are configured to reflect light in the direction in which light from the incident surfaces 11 and 11 is diffused obliquely along the longitudinal direction.
  • the reflection concave grooves 14 ⁇ / b> A are configured to reflect light from one light source unit 2 so as to be obliquely directed toward the other light source unit 2.
  • the angle formed between the light emitting direction reflected by the reflecting concave groove 14A projected on the plane area parallel to both side surfaces 15 and 15 and the exit surface 12 is 50 degrees or more. The range may be about 80 degrees.
  • the reflection groove 14A has an angle formed between the reflection surface 13A where the reflection groove 14A is not provided and the groove reflection surface 14a of the reflection groove 14A where light is incident and reflected, as described above. What is necessary is just to set according to various factors.
  • the angle formed by the reflecting surface 13A where the reflecting groove 14A is not provided that is, the plane that intersects the incident surface and is parallel to the emitting surface 12 and the groove reflecting surface 14a of the reflecting groove 14A, An example of about 140 to 160 degrees is shown.
  • light is guided while being repeatedly reflected in the light guide member 10A, and is incident on the groove reflection surface 14a of the reflective concave groove 14A.
  • the emitted light is reflected in a direction in which it is diffused obliquely along the longitudinal direction.
  • the light from one light source unit 2 is radiate
  • the light guide member 10A according to the present embodiment configured as described above and the light emitting device 1A provided with the light guide member 10A have substantially the same effects as those of the first embodiment.
  • the reflection concave groove 14A is configured to reflect light in a direction in which light from the incident surface 11 is diffused obliquely along the opposing direction. Therefore, the light emitted from the emission surface 12 is diffused obliquely along the facing direction, and a relatively wide range can be irradiated even when the irradiation target is close.
  • the example which made the light guide member 10 (10A) conceptually a substantially rectangular parallelepiped shape is shown, it is not restricted to such an aspect.
  • it is good also as a lens shape which can condense the light from a light source in the longitudinal direction both ends by which the light source units 2 and 2 are arrange
  • the both side surfaces 15 and 15 are expanded from the reflection surface 13 (13A) toward the emission surface 12 so that the diffusion of light in the direction orthogonal to the opposing direction (the both side surfaces 15 and 15 direction) can be further reduced.
  • the exit surface 12 may be a convex curved surface so that the diffusion of light in the direction orthogonal to the opposing direction can be further reduced.
  • a light beam emitted from a point light source is illustrated, but the present invention is not limited to such a mode.
  • a plurality of LEDs may be arranged in parallel in the direction from the reflecting surface 13 (13A) toward the emitting surface 12 (the vertical direction in FIGS. 1B and 2B).
  • the example shown as the elongate rod-shaped light guide member 10 (10A) is shown in the figure example, as the substantially flat plate-shaped light guide member 10 (10A) formed largely along both side surfaces 15 and 15 directions. Also good. In this case, a plurality of LEDs or light source units 2 may be arranged in parallel along both side surfaces 15 and 15.
  • the light source is not limited to the LED, and an incandescent lamp, a discharge lamp, and other light sources may be adopted.
  • each of the reflection concave grooves 14 (14A) has a substantially inverted isosceles triangle shape, but is not limited to such a shape, and may have another inverted triangle shape or a substantially inverted trapezoidal shape.
  • the dimension between the light source units 2 and 2 is sufficiently longer than the dimension from the reflection surface 13 (13A) to the emission surface 12, the light from each light source unit 2 and 2 is opposed to the opposite direction.
  • the light is reflected from the reflection concave groove 14 (14A) provided on the light source unit 2 side and the other reflection surface (side surface, etc.) and emitted from the emission surface 12 before reaching the center portion. is there. Therefore, in such a case, the shape and angle of the groove surface on the side different from the groove reflection surface of the reflection concave groove 14 (14A) (the groove surface on the center side in the opposing direction) may be any.
  • the reflective surface 13 (13A) not provided with the reflective concave grooves 14 (14A) is illustrated as being substantially coplanar.
  • the present invention is not limited to such an embodiment.
  • the reflection surface 13 (13A) is an inclined surface that is inclined toward the emission surface 12 toward the center in the opposite direction so that the illuminance deficiency at the central portion in the opposite direction can be more effectively reduced. It is good also as an aspect which forms a reflective ditch
  • groove 14 and 14A substantially the same shape
  • the light guide member 10 shown in FIG. 2 has the same configuration as the light guide member 10 shown in FIG. Therefore, also in the light guide member 10 shown in FIG. 2, the same effect as the light guide member 10 shown in FIG. 1 is acquired.
  • the reflective ditch 14 has an inner surface.
  • the inner surface of the reflective concave groove 14 is defined as a groove reflective surface 14a.
  • the angle formed by the surface parallel to the emission surface 12 and the groove reflection surface 14a of the reflection concave groove 14 is set to 140 degrees or more and 160 degrees or less. Therefore, the illuminance on the irradiation target surface can be relatively improved.
  • the angle formed between the surface parallel to the emission surface 12 and the groove reflection surface 14a of the reflection groove 14 is 120 degrees or more and 160. It can be set to below the degree.
  • the angle formed between the surface parallel to the emission surface 12 and the groove reflection surface 14a of the reflection groove 14 is not limited to 120 degrees or more and 160 degrees or less.
  • the angle formed by the surface parallel to the emission surface 12 and the groove reflecting surface 14a of the reflecting groove 14 is appropriately determined according to the application.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention porte sur un élément de guidage de lumière (10) qui guide une lumière incidente à travers des surfaces d'entrée (11, 11) qui se trouvent sur les deux extrémités de celui-ci, et qui sont disposées entre des sources de lumière (2, 2), qui sont disposées de façon à se faire mutuellement face et qui fournissent en sortie une lumière à partir d'une surface de sortie (12) située de façon à croiser les surfaces d'entrée. Sur une surface réfléchissante (13) située sur le côté opposé à la surface de sortie de façon à croiser les surfaces d'entrée sont disposées un grand nombre de rainures en creux réfléchissantes (14) ayant une forme de prisme, et orientées dans une direction orthogonale à la direction vers laquelle font face les sources de lumière. Des espaces sont ouverts entre celles-ci le long de cette direction de vis-à-vis, et une forme sensiblement symétrique est formée, prenant en sandwich le centre substantiel (3) de celle-ci dans cette direction de vis-à-vis.
PCT/JP2011/066450 2011-02-21 2011-07-20 Elément de guidage de lumière et dispositif émetteur de lumière le comportant WO2012114553A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011034350A JP2012174445A (ja) 2011-02-21 2011-02-21 導光部材及びこれを備えた発光装置
JP2011-034350 2011-02-21

Publications (1)

Publication Number Publication Date
WO2012114553A1 true WO2012114553A1 (fr) 2012-08-30

Family

ID=46720359

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/066450 WO2012114553A1 (fr) 2011-02-21 2011-07-20 Elément de guidage de lumière et dispositif émetteur de lumière le comportant

Country Status (2)

Country Link
JP (1) JP2012174445A (fr)
WO (1) WO2012114553A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014189822A1 (fr) * 2013-05-24 2014-11-27 3M Innovative Properties Company Guides de lumière

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015079675A1 (fr) * 2013-11-29 2015-06-04 パナソニックＩｐマネジメント株式会社 Élément de guide de lumière et son procédé de fabrication
WO2015145505A1 (fr) * 2014-03-28 2015-10-01 パナソニックＩｐマネジメント株式会社 Élément de guidage de lumière, procédé de fabrication d'élément de guidage de lumière, et unité d'éclairage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000292786A (ja) * 1999-04-05 2000-10-20 Hitachi Ltd 線状光源およびこの線状光源を用いた液晶表示装置
JP2003162914A (ja) * 2001-11-28 2003-06-06 Alps Electric Co Ltd 面発光体および液晶表示装置
JP2006202703A (ja) * 2005-01-24 2006-08-03 Dainippon Printing Co Ltd 面光源装置
WO2008133421A1 (fr) * 2007-04-25 2008-11-06 Hyu Wan Park Dispositif d'éclairage utilisant une plaque de guidage de la lumière
JP2009251122A (ja) * 2008-04-02 2009-10-29 Harison Toshiba Lighting Corp 導光板及びバックライト装置
WO2009157352A1 (fr) * 2008-06-23 2009-12-30 ソニー株式会社 Dispositif à source de lumière plane et dispositif d’affichage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000292786A (ja) * 1999-04-05 2000-10-20 Hitachi Ltd 線状光源およびこの線状光源を用いた液晶表示装置
JP2003162914A (ja) * 2001-11-28 2003-06-06 Alps Electric Co Ltd 面発光体および液晶表示装置
JP2006202703A (ja) * 2005-01-24 2006-08-03 Dainippon Printing Co Ltd 面光源装置
WO2008133421A1 (fr) * 2007-04-25 2008-11-06 Hyu Wan Park Dispositif d'éclairage utilisant une plaque de guidage de la lumière
JP2009251122A (ja) * 2008-04-02 2009-10-29 Harison Toshiba Lighting Corp 導光板及びバックライト装置
WO2009157352A1 (fr) * 2008-06-23 2009-12-30 ソニー株式会社 Dispositif à source de lumière plane et dispositif d’affichage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014189822A1 (fr) * 2013-05-24 2014-11-27 3M Innovative Properties Company Guides de lumière
CN105393051A (zh) * 2013-05-24 2016-03-09 3M创新有限公司 光导
US10107951B2 (en) 2013-05-24 2018-10-23 3M Innovative Properties Company Lightguides having angled light extracting surfaces and specific optical absorption coefficient
CN105393051B (zh) * 2013-05-24 2019-05-31 3M创新有限公司 光导
US11041985B2 (en) 2013-05-24 2021-06-22 3M Innovative Properties Company Lightguides with asymmetric light extracting structures

Also Published As

Publication number Publication date
JP2012174445A (ja) 2012-09-10

Similar Documents

Publication Publication Date Title
JP4780788B2 (ja) Ｌｅｄ灯具ユニット
JP4273930B2 (ja) 導光板及びバックライト装置
JP6709095B2 (ja) 車両用灯具
JP2004319482A (ja) 光偏向部材を備える導光板及び側面発光型バックライト装置
US20060198598A1 (en) Light-guide plate
US20090002987A1 (en) Collimation Arrangement and Illumination System and Display Device Using the Same
JP4732266B2 (ja) 導光板
JP2007048465A (ja) Ｌｅｄ面光源装置
US20150160395A1 (en) Light guide with light input features
JP2010003597A (ja) Ｌｅｄ灯具ユニット
EP3004729A1 (fr) Guides de lumière
JP2006332638A (ja) Ｌｅｄ装置
KR20090084830A (ko) 광 도파로 및 광학 장치
WO2012114553A1 (fr) Elément de guidage de lumière et dispositif émetteur de lumière le comportant
JP5919017B2 (ja) 導光ユニット
JP5853739B2 (ja) コリメート光源及び面光源装置
TWI553272B (zh) 側入式背光模組
JP2007265689A (ja) バックライト
WO2016178369A1 (fr) Élément de commande de flux lumineux, dispositif émetteur de lumière, dispositif de source de lumière plat et dispositif d'affichage
JP5950529B2 (ja) 面光源装置およびそれを備える表示装置
KR20160076086A (ko) 차량용 램프 장치
WO2022202232A1 (fr) Corps de guidage de lumière, dispositif d'éclairage, capteur d'image et dispositif de lecture
JP5086158B2 (ja) Ｌｅｄ照明装置
JP2005085734A (ja) 導光板及び面光源装置並びに導光板の製造方法
JP2016178046A (ja) 導光体およびこれを使用したライン照明表示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11859140

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11859140

Country of ref document: EP

Kind code of ref document: A1