WO2012053263A1 - Elément de guidage de lumière et appareil émetteur de lumière équipé de ce dernier - Google Patents

Elément de guidage de lumière et appareil émetteur de lumière équipé de ce dernier Download PDF

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Publication number
WO2012053263A1
WO2012053263A1 PCT/JP2011/066449 JP2011066449W WO2012053263A1 WO 2012053263 A1 WO2012053263 A1 WO 2012053263A1 JP 2011066449 W JP2011066449 W JP 2011066449W WO 2012053263 A1 WO2012053263 A1 WO 2012053263A1
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WO
WIPO (PCT)
Prior art keywords
light guide
light
surface portion
guide member
lens
Prior art date
Application number
PCT/JP2011/066449
Other languages
English (en)
Japanese (ja)
Inventor
大野　達司
小泉　秀樹
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
Priority to CN201180050354.1A priority Critical patent/CN103168195B/zh
Publication of WO2012053263A1 publication Critical patent/WO2012053263A1/fr

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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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to 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
    • G02B6/0005—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 of the fibre type
    • G02B6/001—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 of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre

Definitions

  • the present invention relates to a light guide member that guides and emits light from a light source, and a light emitting device including the same.
  • Patent Document 1 proposes an edge light type illumination device including a light guide material that irradiates light from a light source introduced from the side end surface into the inside.
  • the conventional illumination device as described above has a problem that a part of light from the light source arranged on one end face diffuses without being along the light guide direction. Further, since the diffused light is incident on the light guide plate, there is a problem that the light emitted from the emission surface tends to increase the diffused light.
  • the present invention has been made in view of the above circumstances, and an object thereof is to provide a light guide member capable of reducing diffused light and a light emitting device including the same.
  • a light guide member includes an end surface portion disposed on the light source side, a reflecting surface portion provided so as to intersect the one end surface portion, and the one end surface portion on the opposite side of the reflecting surface portion. And a light guide plate portion having an emission surface portion provided so as to intersect the light source, a light receiving plate portion formed so as to protrude from the one end surface portion toward the light source side, and having a recess for receiving the light source, and light from the light source And a lens portion for condensing the light.
  • both side portions of the lens portion formed so as to be continuous with both side surface portions formed so as to intersect the one end surface portion of the light guide plate portion are tapered toward the peripheral edge portion of the concave portion.
  • the convex curved surface shape may be used.
  • the lens portion is inclined so as to taper from both side edges on the base end side of the convex curved surface-shaped portions of the both side portions toward both side surface portions of the light guide plate portion.
  • a surface portion may be further provided.
  • both side surface portions formed so as to intersect the one end surface portion of the light guide plate portion are formed in an inclined shape so as to expand from the reflection surface portion toward the emission surface portion. Also good.
  • the light guide member is configured to receive light from the light source, guide the light, and emit light in a predetermined direction.
  • a light emitting device includes a light guide member according to the present invention and a light source disposed so as to be accommodated in the concave portion of the lens portion of the light guide member. It is characterized by.
  • the light guide member and the light emitting device including the light guide member according to the present invention can reduce diffused light by having the above-described configuration.
  • FIG. 3B is a partially broken schematic enlarged longitudinal sectional view corresponding to a portion X in FIG. 2. It is a partially-omission schematic perspective view of the light-emitting device.
  • (A) is a partially broken schematic enlarged exploded perspective view corresponding to part X in FIG. 2
  • (b) is a partially broken schematic enlarged exploded perspective view seen from the other direction corresponding to (a)
  • FIG. 3C is a partially broken schematic enlarged perspective view corresponding to a portion X in FIG. 2, and FIG.
  • FIG. 4D is a partially broken schematic enlarged perspective view seen from the other direction corresponding to FIG. (A) shows typically the modification of the light guide member with which the light-emitting device is provided,
  • the figure corresponding to FIG. 1 (a), (b) is the other modification of the light guide member typically.
  • FIG. 3 is a schematic enlarged longitudinal sectional view corresponding to the view taken along line YY in FIG.
  • FIG. 1 to 4 are conceptual explanatory views for explaining an example of a light guide member according to the present embodiment and a light emitting device including the light guide member.
  • the light-emitting device 3 guides light emitted from the light source unit 2 having an LED (light-emitting diode) 26 as a light source and the light source unit 2. And a light guide member 1 that emits (irradiates).
  • LED light-emitting diode
  • the light guide member 1 is formed so as to protrude from the longitudinal end surface 11 of the light guide plate portion 10 toward the LED 26 side.
  • the lens part 15 is provided.
  • the light guide member 1 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.
  • the light guide member 1 is formed symmetrically in the width direction with the center in the width direction (a direction perpendicular to both the top and bottom and the left and right) as the axis of symmetry.
  • the light guide member 1 is formed in an elongated shape, whereby the light guide member 1 and the light guide plate portion 10 have a length direction.
  • One end of the light guide plate portion 10 in the length direction is defined as one end surface portion 11.
  • the light guide member 1 and the light guide plate part 10 have a width, whereby the light guide member 1 and the light guide plate part 10 have a width direction along the width.
  • the width direction of the light guide member 1 and the light guide plate portion 10 is orthogonal to the length direction of the light guide member 1 and is along the emission surface portion 13.
  • the light guide member 1 and the light guide plate part 10 have thickness, and, thereby, the light guide member 1 and the light guide plate part 10 have the thickness direction along thickness.
  • the thickness direction of the light guide member 1 and the light guide plate portion 10 is orthogonal to the length direction of the light guide member 1 and is orthogonal to the emission surface portion 13.
  • the lens portion 15 protrudes from the one end surface portion 11 outward in the length direction of the light guide plate portion 10.
  • the lens unit 15 has a width, whereby the lens unit 15 has a width direction along the width.
  • the width direction of the lens portion 15 is orthogonal to the length direction of the light guide member 1 and is along the emission surface portion 13.
  • the lens part 15 has thickness, and, thereby, the lens part 15 has the thickness direction along thickness.
  • the thickness direction of the lens portion 15 is orthogonal to the length direction of the light guide member 1 and is orthogonal to the emission surface portion 13.
  • the light guide plate portion 10 includes an end surface portion 11 disposed on the LED 26 (light source unit 2) side, and a reflection surface portion 12, an emission surface portion 13, and both side surface portions 14 and 14 provided so as to intersect the one end surface portion 11.
  • the longitudinal cross-sectional shape is a substantially rectangular shape, and it is set as the elongate plate-shaped body.
  • the reflection surface portion 12 is provided on the upper surface side of the light guide plate portion 10
  • the emission surface portion 13 is provided on the opposite side of the reflection surface portion 12, that is, on the lower surface side of the light guide plate portion 10.
  • the light guide plate part 10 is reflected by the reflection surface part 12 while guiding the light emitted from the LED 26 and incident from the one end surface part 11 side along the longitudinal direction, and the reflected light is emitted from the emission surface part 13.
  • the so-called edge light structure is used.
  • the light incident from the one end surface portion 11 side is inclined downward as it goes from the one end surface portion 11 side toward the other end side so as to be emitted substantially uniformly in the longitudinal direction from the lower surface side emission surface portion 13.
  • the reflective surface portion 12 is formed on the surface.
  • a plurality of prismatic light guide grooves (light guides) along the width direction (thickness direction of the light guide plate portion 10 (both side surface portions 14 and 14 directions)) with an interval along the longitudinal direction in the reflective surface portion 12. pattern) May be provided.
  • the light incident from the one end surface portion 11 side is reflected by the upper surface side reflecting surface portion 12 and is emitted from the lower surface side emitting surface portion 13 substantially uniformly along the longitudinal direction as it goes toward the other end side. You may make it make the space
  • the light guide plate portion 10 is formed at the lower end portions of the side surface portions 14 and 14 so as to protrude outward in the width direction of the light guide plate portion 10, and substantially in the longitudinal direction of the light guide plate portion 10. Rib-like engagement portions 14a and 14a are provided over the entire length (see also FIG. 3).
  • the light guide member 1 may be assembled to the casing by engaging the engaging portions 14 a and 14 a with concave grooves or the like provided on both inner side walls of the casing (not shown) of the light emitting device 3.
  • the lens portion 15 is formed integrally with the one end surface portion 11 of the light guide plate portion 10 having the above-described structure, and has a concave portion 16 that receives the LED 26, and condenses light emitted from the LED 26.
  • the lens unit 15 has a longitudinal section corresponding to the arrangement of LEDs 26 provided in a plurality (four in the illustrated example) in the vertical direction on a substrate (printed circuit board) 25 to be described later of the light source unit 2.
  • the shape is a substantially oval shape (substantially rounded rectangular shape) that is long in the vertical direction (see also FIGS. 3A and 3B).
  • the base end portion of the lens portion 15 is attached to the one end surface portion 11 so that the upper end is substantially continuous with the reflecting surface portion 12 and the lower end is located in the middle of the one end surface portion 11 in the vertical direction. In this way, they are integrally provided (see FIGS. 1B and 3B).
  • the concave portion 16 is provided at the front end portion of the lens portion 15 in the protruding direction, and opens toward the light source unit 2 side.
  • the shape of the concave portion 16 is also made into a substantially oval shape (substantially rounded rectangular shape) that is vertically long when viewed along the opening direction so that the plurality of LEDs 26 arranged on the substrate 25 can be received. ing.
  • the outer peripheral side portion on the distal end side in the protruding direction of the lens portion 15 is formed in a tapered shape from the proximal end side in the protruding direction toward the opening peripheral edge portion of the concave portion 16.
  • the convex curved surface portion 17 has a convex curved surface shape.
  • the convex curved surface portion 17 is formed in an expanded shape from the peripheral edge of the opening of the concave portion 16 toward the proximal end side of the lens portion 15 and has a convex curved surface shape.
  • the convex curved surface portion 17 is provided over the entire circumference around the concave portion 16 in the present embodiment.
  • the convex curved surface portion 17 has a peripheral edge of the convex curved surface portion 17 on the one end surface portion 11 side of the bottom surface of the concave portion 16 (surface on the one end surface portion 11 side). It is formed to do. Thereby, the light radiate
  • the radius of curvature of the convex curved surface portion 17 can efficiently reflect light emitted from the LED 26 and incident from the inner peripheral side surface of the concave portion 16 toward the light guide direction (longitudinal direction of the light guide member 1). As such, it may be set according to the refractive index of the light guide member 1 or the like.
  • the lens portion 15 has an inclined surface portion 18 that is tapered (tapered) toward the one end surface portion 11 of the light guide plate portion 10 from the peripheral edge on the proximal end side of the convex curved surface portion 17.
  • the inclined surface portion 18 has a shape that inclines in an expanding shape (tapered shape) from the one end surface portion 11 of the light guide plate portion 10 toward the peripheral edge of the convex curved surface portion 17.
  • the inclined surface portion 18 is formed over the entire circumference of the outer peripheral side surface of the lens portion 15 in the same manner as the convex curved surface portion 17 provided over the entire circumference around the concave portion 16 as described above.
  • both side portions in the width direction of the inclined surface portion 18 and both side surface portions 14 and 14 of the light guide plate portion 10 are formed to be continuous surfaces as shown in FIG. That is, both side portions in the width direction of the inclined surface portion 18 are provided so as to be inclined in a tapered manner from both side edges on the proximal end side of the convex curved surface portion 17 toward both side surface portions 14 and 14 of the light guide plate portion 10.
  • the inclination angle of the inclined surface portion 18 may be set so that light emitted from the LED 26 can be efficiently guided toward the light guide plate portion 10.
  • the lens unit 15 is provided with a pair of locking protrusions 19 that engage with a substrate case 20 described later of the light source unit 2.
  • the pair of locking protrusions 19 and 19 are provided so as to be attached to both side portions of the convex curved surface portion 17 of the lens portion 15 and are formed so as to protrude toward the light source unit 2 side. Has been.
  • through holes 22a and 22a provided in the substrate case 20 are provided at the projecting ends of the pair of locking projections 19 and 19, respectively.
  • Locking claws 19a and 19a that are locked to the hole edges are respectively provided.
  • protrusions 19b and 19b are respectively provided at the projecting direction base ends of the pair of locking protrusions 19 and 19. These protrusions 19b and 19b prevent contact between the light guide member 1 and a pattern (circuit) 28 formed on a substrate 25 described later in a state where the light guide member 1 and the light source unit 2 are assembled. It is formed as follows.
  • the light source unit 2 opens toward the one end face 11 side of the light guide member 1 and has a substrate case 20 having a recess 21 for receiving the lens portion 15 of the light guide member 1, and the inside of the recess 21 of the substrate case 20. And a substrate 25 disposed on the substrate.
  • the substrate case 20 includes a bottom portion 22 constituting the bottom surface of the recess 21, side wall portions 23 and 23 formed so as to face each other in the width direction, and the side wall portions 23 and 23. And a lower side portion 24 formed so as to connect the lower ends thereof.
  • the recess 21 is defined.
  • the bottom portion 22 of the substrate case 20 is provided with through holes 22a and 22a into which a pair of locking projections 19 and 19 provided on the light guide member 1 are inserted and engaged.
  • the substrate case 20 may be formed of a metal-based material such as aluminum from the viewpoint of improving heat transfer from various electronic components mounted on the substrate 25 and improving heat dissipation.
  • the substrate 25 is formed in a substantially rectangular thin flat plate shape corresponding to the recess 21 of the substrate case 20, and a light emitting element serving as a light source is provided on the surface side (light guide member 1 side) of the substrate 25.
  • Electronic components such as a plurality of LEDs 26 and connectors 27 are mounted.
  • the LED 26 is not limited to a cannonball type in which a light emitting element (LED element) as shown in the figure is sealed with a resin or the like, and may be other shapes such as a chip shape. You may make it employ
  • the substrate 25 may be formed of a metal-based material such as aluminum from the viewpoint of improving heat dissipation, or may have a multilayer structure in which insulating layers and the like are stacked.
  • a heat transfer (heat radiation) sheet 29 is attached to the back side (bottom 22 side) of the substrate 25.
  • a gel sheet such as a silicone gel having good thermal conductivity, a silicone sheet, or other resin sheets may be employed.
  • a resin sheet that can be compressively deformed (elastically deformed) at least in the thickness direction (the left-right direction in the figure) is employed.
  • the assembly of the substrate 25 to the substrate case 20 may be fixed using a fixing stopper such as a screw.
  • a fixing stopper such as a screw.
  • ribs, grooves or the like for receiving the width direction end portions of the substrate 25 are provided on both side wall portions 23, 23 of the substrate case 20, and are slid and inserted through openings above the recesses 21 of the substrate case 20. It may be assembled.
  • various mounting structures can be employed.
  • the light guide member 1 having the above structure and the light source unit 2 may be assembled as follows, as shown in FIG.
  • the lens portion 15 provided at one end portion of the light guide member 1 is disposed opposite to the recess 21 of the substrate case 20. Then, the pair of locking protrusions 19 and 19 of the lens portion 15 of the light guide member 1 are inserted into the pair of through holes 22 a and 22 a of the substrate case 20.
  • the pair of locking projections 19 and 19 are inserted into the pair of through holes 22a and 22a while being elastically deformed, and the locking claws 19a and 19a at the tips are locked to the hole edges of the through holes 22a and 22a. . Thereby, the said light guide member 1 and the light source unit 2 can be assembled
  • the plurality of LEDs 26 of the light source unit 2 are disposed in the recess 16 of the lens portion 15 of the light guide member 1. Moreover, these several LED26 is arrange
  • the protrusions 19b and 19b formed at the base end portions of the pair of locking projections 19 and 19 come into contact with the respective edge portions in the width direction of the substrate 25, and the lens portion. 15 and the pattern 28 provided on the substrate 25 can be prevented (see FIG. 1A).
  • the pair of locking projections 19, 19 are connected to the lens portion 15 of the light guide member 1, It functions as a positioning member for the LED 26 of the light source unit 2.
  • the light guide member 1 configured as described above and the light-emitting device 3 including the light guide member 1, diffused light from the emission surface portion 13 of the light guide plate portion 10 can be reduced.
  • the light guide member 1 of the present embodiment is configured to receive light from a light source, guide the light, and emit light in a predetermined direction.
  • the light guide member 1 has a light guide plate portion 10 and a lens portion 15.
  • the light guide plate portion 10 includes an end surface portion 11, a reflection surface portion 12, and an emission surface portion 13.
  • the one end surface portion 11 is disposed on the light source side. In other words, the one end surface portion 11 is disposed so as to face the light source.
  • the reflection surface portion 12 is provided so as to intersect the one end surface portion 11.
  • the emission surface portion 13 is located on the opposite side to the reflection surface portion 12.
  • the emission surface portion 13 is provided so as to intersect the one end surface portion 11.
  • the lens portion 15 is formed so as to protrude from the one end surface portion 11 toward the light source side.
  • the lens unit 15 has a recess 16 that receives the light source.
  • the lens unit 15 is configured to collect light from the light source.
  • the lens portion 15 is formed on the one end surface portion 11 of the light guide plate portion 10, the diffused light emitted from the LED 26 is condensed by the lens portion 15 and guided toward the light guide plate portion 10. Can do. Therefore, the diffused light from the exit surface portion 13 of the light guide plate portion 10 can be reduced, and the light emitted from the exit surface portion 13 can be brought close to parallel light. As a result, when a surface cover or the like having a condensing lens or a polarizing lens is provided along the emission surface portion 13, the light emitted from the emission surface portion 13 can be efficiently condensed on the surface cover or polarized. It is also possible to make it.
  • the concave portion 16 for receiving the LED 26 is provided in the lens portion 15, the light emitted from the LED 26 and diffused can be efficiently incident on the bottom surface and the inner peripheral side surface of the concave portion 16 of the lens portion 15, Efficient condensing is possible in the lens unit 15.
  • the light guide member 1 has a length, whereby the light guide member 1 has a length direction along the length of the light guide member 1.
  • the lens unit 15 is disposed at one end of the light guide member 1 in the length direction.
  • the length direction of the lens unit 15 is defined as the same direction as the length direction of the light guide member 1.
  • the lens portion 15 has both side surface portions 14 and both side portions. Both side surface portions 14 are formed so as to intersect one end surface portion 11 of the light guide plate portion 10. Both side portions are formed so as to be continuous with both side surface portions 14. Both side portions have convex curved surface portions 17 that taper toward the periphery of the concave portion 16.
  • the convex curved surface portion 17 is provided on the outer peripheral side portion around the concave portion 16 of the lens portion 15. Therefore, the diffused light emitted from the LED 26 received in the concave portion 16 can be effectively reflected and condensed at the convex curved surface portion 17, and can be guided more efficiently in the light guide direction.
  • the lens portion 15 has a first lens portion.
  • the width direction and thickness direction of the first lens portion coincide with the width direction and thickness direction of the lens portion 15.
  • the first lens portion has an outer peripheral surface that intersects the length direction of the lens portion 15.
  • the outer peripheral surface of the first lens portion has a convex curved surface portion 17 so that the width and thickness of the first lens portion become smaller as the first lens portion moves outward in the length direction of the lens portion 15. ing.
  • the convex curved surface portion 17 extends toward the peripheral edge of the concave portion 16. Thereby, it can guide light to a light guide direction efficiently.
  • the lens portion 15 is provided with an inclined surface portion 18 that inclines in a tapered manner from the peripheral edge on the proximal end side of the convex curved surface portion 17 toward both side surface portions 14 and 14 of the light guide plate portion 10. Therefore, it is possible to reduce the width dimension along the both sides of the light guide plate portion 10 while being able to guide the light toward the light guide plate portion 10 by being reflected by the convex curved surface portion 17 of the lens portion 15. As a result, the material cost can be reduced, and the light guide member 1 can be reduced in size (thinned).
  • the lens portion 15 further has a second lens portion.
  • the second lens portion is located between the one end surface portion 11 and the first lens portion. As the second lens portion moves from the one end surface portion 11 toward the first lens portion, the width and thickness of the second lens portion are increased.
  • the width dimension along the both sides of the light guide plate portion 10 can be reduced while the light can be reflected by the convex curved surface portion 17 of the lens portion 15 and guided toward the light guide plate portion 10.
  • the material cost can be reduced, and the light guide member 1 can be reduced in size (thinned).
  • FIG. 3A shows the light emitting device 3 including the light guide member 1A according to the first modification.
  • the one end surface portion 11 of the light guide plate portion 10A and the convex curved surface portion 17 of the lens portion 15A are connected to a substantially rounded rectangular connection portion 18A. It is set as the structure connected continuously through.
  • the connecting portion 18A has the same outer diameter from the peripheral edge on the proximal end side of the convex curved surface portion 17 to the one end surface portion 11 of the light guide plate portion 10A, and both widthwise side portions thereof are both side surface portions of the light guide plate portion 10A.
  • 14A and 14A are formed in the same plane. That is, in this example, the width dimension of the light guide plate part 10A and the width dimension of the connection part 18A of the lens part 15A are set to be substantially the same dimension.
  • the light guide member 1A can be easily manufactured.
  • the peripheral edge on the proximal end side of the convex curved surface portion 17 is the one end surface portion 11 of the light guide plate portion 10 (10A). It is good also as an aspect connected to.
  • both side portions of the lens portion may be continuous with both side surface portions of the light guide plate portion.
  • FIG. 3B shows a light guide member 1B according to the second modification.
  • the light guide member 1B according to this modification is different from the above-described example in the configuration of the light guide plate portion 10B.
  • the light guide plate portion 10B is formed in an inclined shape (tapered shape) so that both side surface portions 14B and 14B expand from the reflecting surface portion 12 toward the emitting surface portion 13.
  • the light guide plate part 10 has a width.
  • the width of the light guide plate portion 10 increases as it goes from the reflecting surface portion 12 to the emitting surface portion 13.
  • both side surface parts 14B and 14B into an open inclined surface, the diffused light reflected and diffused at the reflecting surface part 12 and directed toward the emitting surface part 13 can be condensed toward the emitting surface part 13. it can. Therefore, according to the light guide member 1B according to the present modification, the diffused light emitted from the emission surface portion 13 can be further reduced, and the light emitted from the emission surface portion 13 is more effectively brought close to parallel light. be able to.
  • the angle of inclination of both side surface portions 14B and 14B is such that light reflected by the reflection surface portion 12 and diffused in the width direction is reflected toward the emission surface portion 13 and can be guided.
  • the light guide member 1B may be set according to the refractive index, the vertical dimension or width dimension of the light guide plate portion 10B, and the like.
  • the lens portions 15 and 15A of the above-described examples can be applied.
  • the both side portions of the lens portion may have a shape corresponding to the shape of the side surface portions 14B and 14B of the light guide plate portion 10B, that is, a downwardly expanding shape, and these may be continuous surfaces, or these A step may be formed in a part between the two.
  • the light-emitting device 3 is provided with a casing for covering the light guide member 1 (1A, 1B), or a light-transmitting or transparent surface cover or the like is provided along the emission surface portion 13. May be.
  • the light guide member 1 (1A, 1B) according to the present embodiment the diffused light from the emission surface portion 13 can be reduced and brought close to parallel light, so that optical operation (condensation, polarization, etc.) is performed by the surface cover. Can be easily performed. Therefore, for example, various light distributions can be easily realized by adopting a configuration in which a surface cover having different light distribution characteristics is attached in a replaceable manner.
  • the convex curved surface portion 17 is provided over the entire circumference of the lens portion 15 (15A) around the concave portion 16, but both sides of the lens portion 15 (15A) in the width direction are shown. Only the portion may be a convex curved surface portion. Also by this, the light emitted from the LED 26 and diffused in the width direction can be efficiently reflected at the convex curved surface portion and guided toward the light guide direction.
  • the outer peripheral side portion around the concave portion 16 of the lens portion 15 (15A) has a convex curved surface shape
  • at least both side portions around the concave portion 16 of the lens portion 15 (15A) are provided on the light guide plate portion 10 (10A).
  • 10B) may be inclined surfaces that expand toward both side surface portions.
  • the lens portion 15 (15A) is provided on the one end surface portion 11 in the longitudinal direction of the light guide plate portion 10 (10A, 10B) is shown.
  • 15 (15A) may be provided, and the light source unit 2 may be attached to the other end side.
  • you may form so that the reflective surface part 12 may be substantially parallel to the output surface part 13, without forming in a sloping shape.
  • the directions such as up and down and left and right described above are shown for convenience, and depending on the arrangement of the light guide members 1 (1A and 1B) and the light emitting device 3 including the light guide members 1 in the above example, These directions are not limited.

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

Abstract

L'invention concerne un élément de guidage de lumière (1) comprenant : une section à lame de guidage optique (10) comprenant une section de face à une extrémité (11) disposée du côté de sources de lumière (26), une section formant face réfléchissante (12) formée de manière à couper la section de face à une extrémité, et une section de face de sortie de lumière (13) formée de manière à couper la section de face à une extrémité d'un côté opposé à la section de face réfléchissante ; et une section à lentille (15) qui est formée de manière à dépasser de la section de face, à une extrémité, vers le côté des sources de lumière, qui présente une section en creux (16) destinée à loger dans celle-ci des sources de lumière, et qui concentre la lumière provenant des sources de lumière.
PCT/JP2011/066449 2010-10-22 2011-07-20 Elément de guidage de lumière et appareil émetteur de lumière équipé de ce dernier WO2012053263A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201180050354.1A CN103168195B (zh) 2010-10-22 2011-07-20 导光部件以及具备该导光部件的发光装置

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CN103836436A (zh) * 2012-11-21 2014-06-04 深圳市海洋王照明工程有限公司 灯具
CN107035997A (zh) * 2016-02-03 2017-08-11 丰田纺织株式会社 交通工具用照明装置
JP2021012824A (ja) * 2019-07-08 2021-02-04 三菱電機株式会社 面光源装置及び照明装置

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WO2015079674A1 (fr) * 2013-11-29 2015-06-04 パナソニックＩｐマネジメント株式会社 Organe de guide de lumière
JP2019147440A (ja) * 2018-02-26 2019-09-05 テイ・エス テック株式会社 照明装置
JP2019147439A (ja) * 2018-02-26 2019-09-05 テイ・エス テック株式会社 照明装置

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JP2004199930A (ja) * 2002-12-17 2004-07-15 Optrex Corp 面光源装置
JP2008053013A (ja) * 2006-08-23 2008-03-06 Sony Corp バックライト装置及び液晶表示装置

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JP2009128647A (ja) * 2007-11-26 2009-06-11 Hitachi Displays Ltd 液晶表示装置
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JP2008053013A (ja) * 2006-08-23 2008-03-06 Sony Corp バックライト装置及び液晶表示装置

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Publication number Priority date Publication date Assignee Title
CN103836436A (zh) * 2012-11-21 2014-06-04 深圳市海洋王照明工程有限公司 灯具
CN107035997A (zh) * 2016-02-03 2017-08-11 丰田纺织株式会社 交通工具用照明装置
JP2021012824A (ja) * 2019-07-08 2021-02-04 三菱電機株式会社 面光源装置及び照明装置
JP7451895B2 (ja) 2019-07-08 2024-03-19 三菱電機株式会社 面光源装置及び照明装置

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JP2012089442A (ja) 2012-05-10

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