WO2014091686A1 - 照明装置 - Google Patents
照明装置 Download PDFInfo
- Publication number
- WO2014091686A1 WO2014091686A1 PCT/JP2013/006826 JP2013006826W WO2014091686A1 WO 2014091686 A1 WO2014091686 A1 WO 2014091686A1 JP 2013006826 W JP2013006826 W JP 2013006826W WO 2014091686 A1 WO2014091686 A1 WO 2014091686A1
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- WIPO (PCT)
- Prior art keywords
- light
- opening
- light emitting
- light guide
- guide plate
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
- F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
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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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
- F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
- F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
- F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—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
- G02B6/0018—Redirecting means on the surface of the light guide
Definitions
- the present invention relates to an illumination device including a light emitting element such as an LED (Light Emitting Diode) as a light source.
- the present invention particularly relates to a technique for reducing luminance unevenness in a lighting device that emits light using a light guide plate.
- an illumination device 900 shown in a cross-sectional view of FIG. 16 has been developed as a surface-emitting illumination device using a light guide plate.
- the lighting device 900 includes a plurality of light emitting elements 922, a reflecting member 945, and a light guide plate 940. Both the reflection member 945 and the light guide plate 940 have a disk shape whose plane direction is a direction perpendicular to the paper surface.
- the light guide plate 940 has a light incident portion 941 that surrounds each light emitting element 922 from above.
- the light emitting elements 922 are arranged circumferentially at intervals with the main emission direction directed toward the light guide plate 940.
- the apparatus 900 includes a power supply unit (not shown) for supplying power to each light emitting element 922.
- a power supply unit (not shown) for supplying power to each light emitting element 922.
- light emitted from the light emitting element 922 enters the incident surface 944 in the light incident portion 941.
- Incident light is reflected by an inclined surface 941 a positioned on the upper surface side of the light incident portion 941, and includes an inner light guide portion 942 positioned inside the light incident portion 941 and an outer light guide portion 943 positioned outside the light incident portion 941. It is guided to. Thereafter, the incident light is emitted to the outside as uniform illumination light from the light emitting surfaces 942a and 943a which are the upper surfaces of the inner light guide portion 942 and the outer light guide portion 943.
- the light incident portion 946X includes an element facing surface 947X, inclined surfaces 948X and 949X, and side surface portions 950X and 951X existing on the opposite side of the inclined surfaces 948X and 949X.
- the element facing surface 947 ⁇ / b> X is disposed to face the emission surface of the light emitting element 922 at the opening of the reflecting member 945 ⁇ / b> X existing around the light emitting element 922.
- the inclination angles of the inclined surfaces 948X and 949X with respect to the upper surface (XY plane in the drawing) of the mounting substrate gradually decrease as the distance from the element facing surface 947X increases on the upper surface side of the light guide plate 940X.
- emitted light including L 9 to L 12 etc. enters the element facing surface 947X from the light emitting element 922.
- the incident light is efficiently regularly reflected in the vicinity of the inclined surfaces 948X and 949X and guided to the entire light guide plate 940X.
- incident side portion 950X as light L 13 of light reflected by the reflecting member 945X without incident to the element facing surface 947X is FIG. 17 (a), the from 951X to the light input portion 946X.
- chip misalignment in which the mounting position of the light emitting element 922 is shifted from the target position may occur.
- the relative position between the light emitting element 922 and the light incident portion 946X is also shifted as shown in the partial cross-sectional view in FIG. Accordingly, in the direction in which chip displacement occurs (Y direction in the drawing), from the side portions 950X and 951X (951X in the drawing) from the light emitting element 922 without passing through the element facing surface 947X and without being reflected by the reflecting member 945X.
- the light that directly enters and enters the inclined surface 949X at a relatively small incident angle increases.
- the incident light is emitted to the outside penetrating the inclined surface 949X, can be a direct light L 14 of high luminance.
- the luminance in the area where the chip shift has occurred is higher than the luminance in the other areas, and this may cause a problem that luminance unevenness occurs.
- the present invention has been made in view of the above problems, and in an illumination device provided with a light guide plate having a light incident portion having an inclined surface, an illumination device capable of suppressing the occurrence of uneven brightness even when chip displacement occurs.
- the purpose is to provide.
- an illumination device is provided with a mounting substrate over which at least one light-emitting element is mounted on an upper surface, and a position that covers the upper surface of the mounting substrate.
- a light guide plate that guides light, and a plate-like member that is provided between the mounting substrate and the light guide plate and has an opening that penetrates in the thickness direction and exposes at least a part of the light emitting element,
- the light guide plate is disposed above the opening and has a light incident portion on which light emitted from the light emitting element is incident.
- the light incident portion is provided on an element facing surface provided to face the light emitting element and on the upper surface side of the light guide plate.
- the plate member has an inclined surface whose inclination angle gradually decreases with respect to the upper surface of the mounting substrate along the first direction parallel to the upper surface of the mounting substrate. And the peripheral edge of the plate-like member extends along the first direction. Te sandwiching an aperture, and a light guide plate configured to have a pair of portions overlapping the element facing surface when viewed in plan.
- the plate-like member has a recessed portion having a recessed upper surface, an opening exists inside the recessed portion, and the light incident portion protrudes toward the opening side. It can also be set as the structure by which the part which protrudes is inserted in the recessed part.
- the plate-shaped member has a side wall rising from the pair of portions inside the recessed portion, and the side wall is cut by a virtual plane that is orthogonal to the upper surface of the mounting substrate and passes through the pair of portions.
- the cross section it may be arranged on a straight line connecting one of the pair of portions and the end of the element facing surface adjacent to the pair of portions.
- a space can be secured between the side wall and the element facing surface along the first direction.
- the plate-like member may be a reflecting member that reflects the light of the light emitting element.
- the light incident portion further includes inclined surfaces whose inclination angle with respect to the upper surface of the mounting substrate gradually decreases as the distance from the element facing surface increases on both sides along the first direction on the upper surface side of the light guide plate. It can also be set as the structure which has.
- the opening includes a first opening sandwiched between the pair of portions, and a first opening along a second direction that intersects the first direction parallel to the upper surface of the mounting substrate. And a second opening having a maximum diameter larger than the maximum diameter of the first opening in a direction parallel to the first direction, and a light incident portion is disposed above the first opening. It can also be.
- the second direction is a direction orthogonal to the first direction, and a pair of second openings are in communication with each other across the first opening. You can also.
- the plurality of light emitting elements are mounted with a space between each other, and the second opening exists above the gap between adjacent light emitting elements. You can also.
- a plurality of light emitting elements are mounted on the upper surface of the mounting substrate in a circumferential shape, and the light incident part is continuously formed so as to connect the plurality of light emitting elements. It can also be.
- the light guide plate has a disk shape, and includes an inner light guide portion positioned on the inner side of the light incident portion and an outer light guide portion positioned on the outer side of the light incident portion. You can also.
- the heights of the upper main surfaces of the inner light guide portion and the outer light guide portion from the upper surface of the mounting substrate are the same, and the inner light guide portion and the outer light guide portion have the same thickness.
- a certain configuration may be adopted.
- the plate member and the light guide plate may be injection molded.
- the light emitting element can be an LED element.
- a configuration having a power supply device for supplying power to the light emitting element may be employed.
- the light-emitting element when the light emitted from the light-emitting element passes through the opening of the plate-like member during driving, the light-emitting element has an interval that is narrower than the width of the element-facing surface of the light incident portion along the first direction. The emitted light is partially shielded by the pair of portions at the peripheral edge of the plate member.
- the light emitted from the high-intensity light-emitting element that is incident on the light guide plate without being reflected by the plate-like member penetrates through the inclined surface with a small inclination angle, and has high luminance. Direct light can be prevented from being emitted to the outside.
- an illuminating device that can suppress the occurrence of uneven brightness even when chip displacement occurs in an illuminating device including a light guide plate having a light incident portion having an inclined surface.
- FIG. 2 is a partial cross-sectional perspective view showing the internal configuration of the lighting fixture 1.
- FIG. 4 is a partial cross-sectional perspective view showing a configuration of a reflecting member 30.
- FIG. 3 is a diagram showing a configuration of a reflecting member 30.
- A) is the top view seen from the diffusion cover 50 side
- (b) is the bottom view seen from the base 10 side.
- FIG. 4 is a partial cross-sectional view showing a configuration around a light incident portion 42.
- FIG. 6 is a partial cross-sectional view around a light incident part 42 showing light emitted from the light emitting element 22 in which chip displacement has occurred.
- FIG. 4A is a partial cross-sectional view around a light incident part 42 showing light emitted from a normal light emitting element 22 (no chip displacement).
- (B) is a partial sectional view showing the angle theta 1 of the emitted light L 1, L 2, and an angle theta 2 of the outgoing light L 2, L 4. This is data showing a luminance unevenness pattern and illuminance distribution when a chip shift occurs in the comparative example.
- (A) is a figure which shows the structure of the opening which concerns on Embodiment 2 of this invention
- (c) is the structure of the opening which concerns on Embodiment 4.
- FIG. (D) is a figure which shows the structure of each opening which concerns on Embodiment 5.
- A) is a figure which shows the structure of the opening which concerns on Embodiment 2 of this invention
- (b) is a figure which shows the structure of the opening which concerns on Embodiment 3
- (c) is the structure of
- FIG. 1 are a partial sectional view (a) around the light incident portion 946X in the lighting device 910 and a partial sectional view (b) around the light incident portion 946X showing the problem of the lighting device 910.
- the lighting device 100 (hereinafter simply referred to as “device 100”) includes a lighting fixture 1 and a leaf spring-like latch. A member 3 and a power supply unit 4 for lighting the lighting fixture 1 are provided. The luminaire 1 is electrically connected to the power supply unit 4 by wiring 23. The latch member 3 is attached to the lighting fixture 1.
- the device 100 is a downlight embedded in the ceiling.
- the power supply unit 4 When installing the apparatus 100, the power supply unit 4 is placed on the back surface 2 b of the ceiling 2 through the through hole 2 a provided in the ceiling 2. It arrange
- the luminaire 1 As shown in a diagram (FIG. 2) showing an external configuration and an internal configuration of the luminaire 1, the luminaire 1 is configured by a base 10 and a diffusion cover 50. A wiring 23 is extended from the notch 16 of the base 10 to the outside.
- the dotted line in FIG. 2 indicates the position of the mounting substrate 20 built in the lighting fixture 1.
- a plurality of light emitting elements 22 are mounted on one surface of the mounting substrate 20 (substrate body 21).
- one surface of the mounting substrate 20 on which the light emitting element 22 is mounted is the upper surface, and the opposite surface is the lower surface.
- the direction orthogonal to the mounting substrate 20 is upward and the opposite direction is the opposite direction. Called downward.
- the XY plane in the drawing indicates a plane parallel to the upper surface of the mounting substrate 20, and the Z direction in the drawing indicates the upper side.
- the lighting fixture 1 (hereinafter simply referred to as “the fixture 1”) includes a base 10, a mounting substrate 20, a reflecting member 30, A light guide plate 40 and a diffusion cover 50 are provided.
- the instrument 1 has a disk-like overall shape.
- Each outer peripheral shape of the base 10, the mounting substrate 20, the reflecting member 30, the light guide plate 40, and the diffusion cover 50 is formed in a circle according to the overall shape of the lighting fixture 1.
- the base 10 is made of a material having excellent heat dissipation characteristics, for example, a metal material such as an aluminum die-cast material.
- the base 10 has a main body part 11 having a two-step bottom structure with a deep center side and a shallow peripheral edge side, and a flange part 12 erected around the main body part 11 (FIG. 3).
- the flange portion 12 has a notch portion 16.
- the main body 11 has a disk-shaped inner bottom 13, a side wall 14 erected on the peripheral edge of the inner bottom 13, and an annular outer side disposed around the side wall 14 from the center side toward the peripheral side. And a bottom 15.
- the mounting substrate 20 and the reflective member 30 are sequentially stacked on the inner bottom portion 13.
- the outer light guide 43 of the light guide plate 40 is placed on the outer bottom 15.
- the flange portion 12 is joined to the side wall portion 52 of the diffusion cover 50 using, for example, an adhesive or a seal member, in the vicinity of the top (Z) direction top.
- the mounting substrate 20 includes an annular substrate body 21, a plurality of light emitting elements 22 mounted on an upper surface of the substrate body 21 (a surface facing the reflecting member 30 in FIG. 3), and wirings 23.
- the substrate body 21 has, for example, a two-layer structure in which an insulating layer made of a ceramic material or a heat conductive resin and a metal layer made of aluminum or the like are laminated.
- a wiring pattern (not shown) for electrically connecting the light emitting element 22 and the wiring 23 is formed on the upper surface of the substrate body 21.
- the outer diameter of the substrate body 21 is substantially matched with the inner diameter of the side wall portion 14.
- the light emitting element 22 uses an LED element as an example. As shown in a partial sectional view (FIG. 7) showing the configuration around the light incident portion 42, as a specific configuration, the light emitting element 22 includes an element main body 220 and an element housing 221 that houses the element main body 220. The light emitting elements 22 are circumferentially mounted at a predetermined interval from each other so that the main emission direction faces the upper (Z) direction with respect to the upper surface of the substrate body 21. On the mounting substrate 20, for example, a total of 18 light emitting elements 22 are face-up mounted on a wiring pattern using a COB (Chip-on-Board) technique.
- COB Chip-on-Board
- the direction along the circumference formed by the light emitting element 22 is referred to as a circumferential direction
- the direction from the light emitting element 22 toward the center of the circumference is referred to as a central direction
- the opposite direction is referred to as an inverse central direction.
- the upper surface of the substrate body 21 has a characteristic of reflecting light (hereinafter referred to as “reflection characteristic”) in order to efficiently reflect the light emitted from the light emitting element 22 toward the light guide plate 40 side.
- the wiring 23 is used to supply power to the light emitting element 22 from the power supply unit 4 side. Both ends of the wiring 23 are electrically connected to the wiring pattern of the substrate body 21 and the power supply unit 4.
- the reflection member 30 is a plate-like member that is disposed for the purpose of efficiently reflecting the light emitted from the light emitting element 22 and the light leaking from the light guide plate 40 toward the light guide plate 40. In the instrument 1, the reflecting member 30 is provided between the mounting substrate 20 and the light guide plate 40.
- the reflection member 30 is configured using a material having high reflection characteristics, such as a high light reflection polybutylene terephthalate (PBT) resin, a high light reflection polycarbonate (PC) resin, a high light reflection nylon resin, a high light reflection foamed resin, and the like.
- PBT polybutylene terephthalate
- PC high light reflection polycarbonate
- the reflection member 30 should just have a reflective characteristic in the surface at least.
- Partial perspective sectional view of the instrument 1 (FIG. 4), partial perspective sectional view of the reflecting member 30 (FIG. 5), a top view of the reflecting member 30 (FIG. 6A) and a bottom view (FIG. 6B)
- the reflecting member 30 includes an inner reflecting portion 31, a recessed portion 32, and an outer reflecting portion 33 from the center side toward the outer side.
- the outer diameter of the reflecting member 30 is substantially matched with the inner diameter of the side wall portion 14.
- the inner reflection part 31 and the outer reflection part 33 have upper surfaces 310 and 320, respectively (FIG. 5).
- the inner reflection part 31 (outer reflection part 33) is provided corresponding to the position inside (outside) the mounting position of the light emitting element 22 of the mounting substrate 20 (FIG. 4).
- the inner reflection part 31 (outer reflection part 33) is a part for reflecting light leaking from the light guide plate 40 to the light guide plate 40 side again on the upper surface 310 (320).
- the recessed portion 32 is provided in a region including the upper part of the mounting position of each light emitting element 22 on the mounting substrate 20, and an annular region having a constant width on the upper surface (the surface facing the light guide plate 40) of the reflecting member 30 in the thickness direction ( It is recessed in the direction opposite to the Z direction (FIG. 5). Therefore, the recessed portion 32 is formed along the circumferential direction.
- a plurality of openings 34 that penetrates in the thickness direction of the reflecting member 30 are arranged at regular intervals along the circumferential direction inside the recessed portion 32. Exist. At this time, the reflecting member 30 has a peripheral end 344 surrounding the opening 34.
- the opening 34 has a first opening 340 and a pair of second openings 341 communicating with the first opening 340.
- the first opening 340 and the pair of second openings 341 communicate with each other along the circumferential direction.
- the maximum diameter of the second opening 341 is larger than the maximum diameter of the first opening 340 (FIG. 5A). Therefore, the opening 34 has a so-called bowl-shaped peripheral shape in which the first opening 340 has a small diameter and the pair of second openings 341 has a large diameter.
- the first opening 340 is present at a position where at least a part of the mounting position of the light emitting element 22 is exposed. That is, the light emitting element 22 and the first opening 340 are in a positional relationship in which at least a part of the light emitting element 22 can be seen from the first opening 340 when the plate-like member 30 is viewed in plan (FIG. 7, FIG. 8).
- a pair of end portions 342 ⁇ / b> A and 343 ⁇ / b> A that are a pair of portions that sandwich the first opening 340 along the direction parallel to the center direction among the peripheral end portions 344 (FIGS. 6A and 6B). see) are close to each other at a relatively small distance W 2.
- the second opening 341 exists in order to efficiently diffuse the light emitted from the light emitting element 22 to a region farther than the light emitting element 22.
- the diameter of the second opening 341 in the direction parallel to the center direction is set to increase as the distance from the first opening 340 increases (FIG. 5A).
- the lower surface of the reflecting member 30 is a flat surface that matches the shape of the upper surface of the substrate body 21 of the mounting substrate 20.
- the light guide plate 40 is used for diffusing the light emitted from the light emitting element 22 in the center and reverse center directions, and causing the surface to emit light toward the diffusion cover 50 (Z direction).
- the light guide plate 40 is disposed above the reflecting member 30.
- the material of the light guide plate 40 include materials having excellent translucency, such as acrylic resin, polycarbonate resin, polystyrene resin, and glass. By injection-molding the light guide plate 40 using these materials, the light guide plate 40 can be configured with high accuracy in the same manner as the reflecting member 30.
- the light guide plate 40 includes an inner light guide part 41, a light incident part 42, and an outer light guide part 43 from the center side toward the outer side (FIG. 3).
- the outer diameter of the light guide plate 40 is substantially matched with the inner diameter of the flange portion 12.
- the heights of the upper main surfaces of the inner light guide 41 and the outer light guide 43 from the upper surface of the substrate body 21 of the mounting substrate 20 are set to be the same (FIG. 4).
- the thicknesses of the inner light guide 41 and the outer light guide 43 are also set to be the same.
- the inner light guide 41 (outer light guide 43) guides the light of the light emitting element 22 that has entered the light guide plate 40 from the light incident part 42 to the inner side (outer side) of the mounting position of the light emitting element 22. It is a site to diffuse.
- the light incident portion 42 is a portion that is disposed above the opening 34 and allows the light emitted from the light emitting element 22 to enter the light guide plate 40 through the opening 34 and diffuse in the central direction and the reverse central direction.
- the light incident part 42 is continuously formed so as to tie the upper part of the light emitting element 22, has a part protruding toward the opening 34, and the protruding part is a recessed part 32 of the reflecting member 30. (FIG. 4).
- FIG. 4 As a specific configuration, as shown in FIG.
- the light incident portion 42 includes an element facing surface 420, a pair of inclined surfaces 422 ⁇ / b> A and 422 ⁇ / b> B, and a boundary portion 423 existing between the inclined surfaces 422 ⁇ / b> A and 422 ⁇ / b> B.
- the light incident portion 42 has a substantially V-shaped cross-sectional shape having a certain thickness as shown in FIGS. 4 and 7.
- side portions 424A and 424B having inclined surfaces similar to the inclined surfaces 422A and 422B are present on the opposite side of the inclined surfaces 422A and 422B (see FIG. 7).
- the element facing surface 420 is a part that is disposed in the vicinity of the light emitting element 22 at the tip that protrudes toward the opening 34 and is disposed to face the upper surface of the light emitting element 22.
- the shape of the element facing surface 420 is a flat surface as an example here.
- Element facing surface 420 has along the central direction parallel, the light entering end portion 420A which is an end portion located at both sides of the width W 1, the 420B (FIG. 7).
- the pair of inclined surfaces 422A and 422B are disposed on the upper surface side of the light guide plate 40.
- the inclined surfaces 422A and 422B gradually decrease in inclination angle with respect to the upper surface of the mounting substrate 20 as they move away from the element facing surface 420 along the opposite center direction and the center direction, respectively. That is, the center direction and the reverse center direction correspond to one aspect of the first direction in the first embodiment.
- the circumferential direction intersects with the central direction and the reverse central direction, and corresponds to an aspect of the second direction in the first embodiment.
- the inclined surfaces 422A and 422B have shapes that are substantially line-symmetric with respect to a straight line passing through the boundary portion 423 in the vertical (Z-axis) direction.
- the inclined surfaces 422A and 422B have the inclination angles as described above, so that incident light incident in the (Z) direction above the element facing surface 420 is specularly reflected on the surface, and the center and reverse center directions in the light guide plate 40 are reflected. Can diffuse efficiently.
- the boundary portion 423 is a minute region that exists between the inclined surfaces 422A and 422B so as to correspond above the mounting position of the light emitting element 22.
- the size of the boundary portion 423 is made as small as possible. Thus, the light emitted from the light emitting element 22 is adjusted so as not to directly pass through the boundary portion 423 when the device 100 is driven.
- a pair of end portions 342 ⁇ / b> A and 343 ⁇ / b> A sandwiching the first opening 340 along the direction parallel to the center direction among the peripheral end portions 344 of the plate-like member 30 planarize the light guide plate 40.
- the width W 1 between the light incident end portions 420A and 420B of the element facing surface 420 is set to be larger than the interval W 2 between the pair of end portions 342A and 343A in a direction parallel to the center direction.
- the pair of end portions 342A and 343A are located inside the light incident end portions 420A and 420B. That is, in the instrument 1, the upper part of the first opening 340 is completely covered with the element facing surface 420.
- a pair of end portions 342A and 343A are arranged on a straight line connecting one of the light incident end portions 420A and 420B adjacent to the light incident end portions 420A and 420B (see the outgoing lights L 2 and L 4 in FIG. 9A).
- the diffusion cover 50 is disposed for the purpose of obtaining surface light emission with a uniform luminance distribution by further scattering the light emitted from the light guide plate 40.
- the diffusion cover 50 is configured using a translucent material such as a silicone resin, an acrylic resin, a polycarbonate resin, or glass.
- the diffusion cover 50 includes a main body 51 that covers the light guide plate 40, and a side wall 52 that is disposed on the periphery of the main body 51 (FIG. 3).
- the main body 51 is subjected to a light scattering process, and is adjusted so as to efficiently scatter the light emitted from the light guide plate 40.
- the light scattering treatment for example, the surface of the main body 51 that faces the light guide plate 40 is subjected to fine uneven processing.
- the light emitted from the light emitting element 22 enters the light guide plate 40 from the light incident portion 42 through the first opening 340 and the second opening 341 of the reflecting member 30.
- Incident light repeats regular reflection inside the light guide plate 40 and diffuses in the center direction and the reverse center direction, that is, inside both the inner light guide 41 and the outer light guide 43.
- the light leaking downward from the light guide plate 40 is reflected on the upper surfaces 310 and 320 (FIG. 5) of the reflecting member 30 and is incident on the light guide plate 40 side again.
- the light emitted from the light emitting element 22 diffused by the light guide plate 40 is emitted from the upper surface side of the light guide plate 40 and enters the diffusion cover 50.
- Incident light is further diffused by the main body 51 of the diffusion cover 50 that has been subjected to light scattering treatment, and finally emitted as illumination light to the outside. (Effects produced by the apparatus 100)
- the apparatus 100 is driven, the following effects can be expected.
- [1] Effect on Chip Deviation of Light-Emitting Element 22 (i) Specific Effect FIG. 8 illustrates an effect exhibited when the chip deviation of the light-emitting element 22 occurs in the central direction (here, the Y direction) in the apparatus 100. It is sectional drawing for doing.
- chip displacement may occur.
- the total length of the light emitting element 22 in a certain direction is about 1.5 mm
- a chip shift in the range of about ⁇ 0.4 mm can occur in that direction.
- FIG. 8 shows a state in which emitted light (dotted line) is emitted toward the inclined surface 422B from the light emitting element 22 in which the chip shift has occurred in the center direction.
- the high-intensity outgoing light L 8 is incident on the inclined surface 422B along the dotted line shown in FIG. 8 without passing through the element facing surface 420 and not reflected by the side walls 342 and 343, the inclined surface Since the incident angle with respect to 422B is small, the emitted light L 8 becomes direct light with high luminance that penetrates the inclined surface 422B and may be emitted to the outside. Therefore, it is assumed that brightness unevenness is caused on the light emitting surface of the instrument 1.
- the emitted light L 8 emitted from the light emitting element 22 is shielded by the end portion 343 ⁇ / b> A that overlaps the element facing surface 420 when the light guide plate 40 is viewed in plan in the peripheral end portion 344 ( 7 and 8).
- the high-intensity outgoing light L 8 that does not pass through the element facing surface 420 and is not reflected by the side walls 342 and 343 reaches the inclined surface 422B. Is suppressed. Accordingly, it is possible to prevent the emitted light L 8 from penetrating the inclined surface 422B and being emitted to the outside as direct light with high luminance.
- the emitted light emitted from the light emitting element 22 to the outside of the element facing surface 420 is the end portion 342A. Is shielded by. Thereby, there exists an effect similar to the above.
- the reflected light reflected by the side walls 342 and 343 may enter the light guide plate 40 from a region other than the element facing surface 420, and may penetrate the light guide plate 40 to be emitted to the outside (FIG. 8).
- 17 (a) light L 13 see FIG. 17 (b) light L 15 ).
- such light is partly diffused and reflected when reflected by the side walls 342 and 343, and the intensity of the light is reduced because the ratio of outgoing light decreases. Therefore, it is difficult to cause uneven brightness.
- the emitted light (including L 5 , L 6 , and L 7 in FIG. 8) from the light emitting element 22 that is not shielded by the pair of end portions 342A and 343A is the first opening 340. Then, the light is appropriately incident on the light guide plate 40 from the periphery of the light incident portion 42 and is guided to the inner light guide portion 41 and the outer light guide portion 43 to contribute to light emission. As a result, it is possible to realize the device 100 that can suppress the occurrence of uneven brightness and can expect uniform surface light emission.
- an end portion sandwiching the opening of the reflection member 945 ⁇ / b> X around the light emitting element 922 is an element.
- a device that does not overlap with the facing surface 947X and the other device was the same as that of the example as a comparative example.
- the chip displacement between the example and the comparative example is the case where the mounting position of the light emitting element is displaced from the reference position toward the center by any deviation amount of ⁇ 0.1 mm, ⁇ 0.3 mm, and ⁇ 0.5 mm, and the reference It was set in the case of shifting by any one of +0.1 mm, +0.3 mm, and +0.5 mm in the direction opposite to the center from the position.
- the chip deviation was set equal for all the light emitting elements on the mounting substrate.
- each apparatus of the Example and the comparative example was driven on the same conditions. The confirmation test results are shown in FIGS.
- FIG. 10 and FIG. 11 show the luminance unevenness pattern and the illuminance distribution at that time when a chip shift occurs in the comparative example and the example in the same order.
- Each of the uneven luminance patterns in each figure is shown by a photograph taken from above of the light emitting surface of the apparatus.
- the illuminance distribution indicates the relative intensity distribution with respect to the distance from the center of the light emitting surface.
- the illuminance distribution becomes more uneven as the amount of deviation increases, regardless of whether the chip deviation occurs in the central direction or the reverse central direction with respect to the reference position. became.
- the illuminance distribution becomes non-uniform, it means that uneven brightness in surface light emission can occur.
- an unnecessary high-brightness peak in the illuminance distribution was likely to occur (see, for example, data with a tip deviation of ⁇ 0.5 mm and +0.5 mm).
- the light emitting surface of the device of the comparative example was viewed from above, the light emitting region changed greatly when chip displacement occurred.
- the luminance unevenness generated in the illuminance distribution is smaller than that in the comparative example even when the chip shift occurs in any direction inside or outside the mounting substrate with respect to the reference position. It was confirmed. Further, when the light emitting surface of the device is viewed from above, the change in the light emitting region due to the shift amount is appropriately suppressed. It should be noted that although the luminance unevenness is slightly observed when the chip deviation becomes very large, it has been found that, as a whole, much more uniform surface light emission is realized as compared with the comparative example.
- the instrument 1 when the instrument 1 is viewed from above, the amount of emitted light is appropriately regulated near the upper portion of the light emitting element 22. As a result, the luminance distribution unevenness in the region corresponding to the mounting position of the light emitting element 22 and the region corresponding to the other position on the upper surface of the diffusion cover 50 is suppressed, which can contribute to the realization of good surface light emission.
- Passing light All of the emitted light 22 (hereinafter referred to as “passing light”) is reflected by the surfaces of the side walls 342 and 343 of the reflecting member 30, and then enters the light incident portion 42 of the light guide plate 40 (FIG. 9). (A)). The effect exhibited at this time will be described with reference to a partial sectional view around the light incident portion 42 (FIG. 9A) and an enlarged sectional view of the light emitting element 22 (FIG. 9B).
- the angle ⁇ 1 shown in FIG. 9B is emitted from a position where the light emitting element 22 is located in the reverse central direction, here the reverse Y direction (center direction, Y direction in the drawing), and the light incident end 420A (420B). It is an angle with respect to the reverse center direction (center direction) of the outgoing light L 1 (L 3 ) in contact with. That is, the passing light emitted from the position toward the opposite center direction (center direction) has an angle of ⁇ 1 or less.
- the angle ⁇ 2 is the outgoing light L 2 (L 4 ) that is in contact with the end 342A (343A) and the incident light end 420A (420B) in the reverse central direction, here the reverse Y direction (center direction, Y direction in the drawing). ) With respect to the reverse center direction (center direction).
- the angle of the passing light emitted toward the opposite center direction is limited to ⁇ 2 or less. This is because light emitted from the light emitting element 22 is shielded by the end portion 342A (343A) or incident on the element facing surface 420 when the angle exceeds ⁇ 2 .
- the side walls 342 and 343 are perpendicular to the upper surface of the mounting substrate 20 and are cut at a virtual plane passing through the pair of peripheral edges b342A and 343A (for example, the cross section of FIG. 9A). It is arranged on a straight line connecting one of the portions 342A and 343A and the light incident end portions 420A and 420B adjacent thereto.
- the passing light strikes the surfaces of the side walls 342 and 343 and enters the light guide plate 40 as reflected light.
- the outgoing light reflected by the side walls 342 and 343 is incident at a sufficiently large incident angle on the vicinity of the inclined surfaces 422A and 422B (FIG. 9A). Accordingly, the emitted lights L 1 to L 4 are regularly reflected in the vicinity of the inclined surfaces 422A and 422B, and are guided well over the entire interior of the light guide plate 40.
- the passing light is incident on the inclined surfaces 422A and 422B like the emitted light L 5 , L 6 and L 7. On the other hand, it is incident at a sufficiently large incident angle. Therefore, the above-described effect can be expected even when a chip shift occurs.
- the maximum diameter of the second opening 341 is larger than the maximum diameter of the first opening 340 in a direction parallel to the central direction. Thereby, the emitted light quantity that passes through the second opening 341 can be made relatively richer than the emitted light quantity that passes through the first opening 340.
- each light emitting element 22 is uniformly dispersed along the annular recess 32.
- a high-luminance light-emitting area corresponding to the mounting position of the light-emitting element 22 and a low-luminance light-emitting area corresponding to the position where the light-emitting element 22 is not mounted are mixed. Are prevented from occurring. Therefore, it is possible to expect uniform surface light emission while suppressing occurrence of luminance unevenness.
- FIG. 12A is a schematic top view at the time of driving the surface emitting type illumination device 910 (shown in FIGS. 17A and 17B) of the comparative example described above.
- FIG. 12B is a photograph taken from above of the state of the light emitting surface when the lighting device 910 is driven.
- the amount of light emitted from the light emitting element 922 is relatively large in the vicinity of the mounting position of the light emitting element 922 between the inner reflecting portion 945Xb and the outer reflecting portion 945Xa of the reflecting member 945X. For this reason, as shown in the enlarged view of FIG. 12A, a light emitting region D 2 having a relatively high luminance exists in the vicinity of the mounting position of the light emitting element 922. On the other hand, in the vicinity of the light emitting region D 2 , there are light emitting regions D 1 and D 3 in which the amount of light emitted from the light emitting element 922 is insufficient and the luminance is relatively low.
- the light emitting regions D 1 to D 3 are arranged on the outer surface of the diffusion cover 50X in accordance with the mounting position of the light emitting elements 922. Appears repeatedly in the direction along. Therefore, when the illumination device 910 is driven, as shown in FIG. 12B, luminance unevenness may occur along the circumferential direction on the light emitting surface.
- FIG. 13A is a schematic top view when the apparatus 100 is driven.
- FIG. 13B is a photograph taken from above of the state of the light emitting surface when the apparatus 100 is driven.
- the first opening portion 340 having a small emitted light amount.
- the second opening portion 341 having a large opening diameter communicating with the first opening portion 340, the light emitted from the light emitting element 22 passes abundantly. Therefore, on the upper surface of the diffusion cover 50, as shown in the enlarged view of FIG. 13A, the light emitting region C 2 corresponding to the first opening 340 and the light emitting regions C 1 and C corresponding to the second opening 341.
- the luminance distribution in 3 and 3 is made uniform. Therefore, when the device 100 is actually driven, as shown in FIG.
- an opening diameter when simply referred to as an opening diameter, it means an opening diameter (distance between peripheral end portions) in a direction orthogonal to the communication direction of the first opening and the second opening.
- FIG. 14A is a diagram showing the shape of the opening 34A provided in the reflecting member according to the second embodiment.
- the opening 34A has the basic structure of the opening 34 of the first embodiment, and the peripheral edge surrounding the pair of second openings 341A communicating with the first opening 340A in one direction (left and right in the drawing) is formed at an acute angle. It has the characteristics that are.
- the opening 34A has a configuration in which the opening diameter of the second opening 341A gradually increases as the distance from the first opening 340A increases, more light exits in the region of the second opening 341A far from the first opening 340A. And can be emitted smoothly.
- FIG. 14 (b) is a diagram showing the shape of the opening 34B provided in the reflecting member according to the third embodiment.
- the opening 34B there is a pair of peripheral edge portions parallel to one direction (left and right direction on the paper surface) sandwiching the first opening 340B. Further, the opening 34B has a pair of rectangular second openings 341B communicating with the first opening 340B.
- the opening 34B according to the third embodiment can also be expected by the opening 34B according to the third embodiment. Furthermore, in the opening 34B, as the distance from the first opening 340B increases, the opening diameter of the second opening 341B increases rapidly. For this reason, a relatively large ratio of the amount of light emitted from the second opening 341B to the first opening 340B can be ensured.
- FIG. 14C is a diagram illustrating the shape of the opening 34 ⁇ / b> C provided in the reflecting member according to the fourth embodiment.
- the opening 34C has the basic configuration of the third embodiment, and has a circular peripheral edge that surrounds the pair of second openings 341C communicating with the first opening 340C.
- the same effect as in the third embodiment can also be expected by the opening 34C according to the fourth embodiment.
- the opening 34C according to the fourth embodiment since there is no corner at the peripheral edge that surrounds the second opening 341C, the emitted light from the second opening 341C has excellent uniformity.
- FIG. 14D is a diagram showing the shape of the opening 34D provided in the reflecting member according to the fifth embodiment.
- the opening 34D has a basic configuration according to the third embodiment, and the opening diameter of the pair of second openings 341D communicating with the first opening 340D is increased in a stepped manner as the distance from the first opening 340D increases. Is.
- the same effect as in the third embodiment can also be expected by the opening 34D according to the fifth embodiment. Furthermore, the amount of light emitted from the second opening 341D can be precisely adjusted by appropriately adjusting the opening diameter of the second opening 341D in steps.
- FIGS. 14A to 14D show only one opening, it is needless to say that a plurality of these openings can exist in the reflecting member of each embodiment. Moreover, in one reflecting member, a plurality of types of these openings including the opening 34 can be mixed.
- FIG. 15 is a partial cross-sectional view around the light incident portion 42 showing the configuration of the light incident portion 42A in the instrument 1A according to the sixth embodiment.
- the difference between the appliance 1A and the appliance 1 is that, in the light guide plate 40A, the shape of the element facing surface 420C is a gently curved surface that protrudes downward.
- the lighting device according to the present invention is not limited to a ceiling light embedded in a ceiling. In addition to ceiling lights installed by other installation methods, it can be widely used for lighting applications such as downlights and backlights.
- the retaining member 3 is not essential.
- the luminaire 1 may be fixed to the ceiling using screws, rivets, adhesion, or the like.
- the power supply unit 4 and the lighting fixture 1 are configured separately, but the present invention is not limited to this structure. That is, the illuminating device of the present invention may be configured such that the luminaire 1 includes the power supply unit 4 therein.
- the light emitting device according to the present invention may be, for example, an LD (laser diode) or an EL device (electric luminescence device). Further, the light emitting element according to the present invention may be an SMD (Surface Mount Device) type.
- the diffusion cover is not essential.
- the reflecting member 30 is configured as an integral type.
- adjacent openings 34 may communicate with each other.
- the reflecting member 30 can be composed of two members, an inner reflecting portion 31 and an outer reflecting portion 33.
- the recessed portion is not essential. What is necessary is just to arrange
- the total thickness of the reflection member and the light guide plate can be reduced by inserting the light incident portion into the recessed portion. Therefore, it can contribute to the downsizing of the instrument.
- the light guide plate may have a flat surface facing the reflecting member, but a plurality of minute lenses may be provided to change the reflection characteristics of light passing through the light guide plate. Thereby, the light guide effect of the light guide plate can be improved.
- the reflecting member 30 is exemplified as the plate-like member provided above the mounting substrate 20.
- the configuration of the plate member is not limited to the reflecting member. That is, the plate-like member can be configured not to have reflection characteristics.
- the instrument is disk-shaped, but the instrument is not limited to this shape.
- a mounting substrate may be configured by arranging a plurality of light emitting elements on a long substrate body.
- the base, the reflection member, the light guide plate, and the light guide cover are configured to be long like the mounting substrate. Thereby, an instrument can also be made long.
- the first direction is a direction in which the inclination angle of the inclined surface with respect to the upper surface of the mounting substrate starting from the element facing surface (and the light emitting element facing it) gradually decreases, and is determined according to the shape of the light guide plate.
- the first direction can be only one of the central direction and the reverse central direction.
- it can also be the direction which crosses the longitudinal direction.
- all directions parallel to the upper surface of the mounting substrate with the light emitting element as the center can be set.
- the second direction is the circumferential direction, but the second direction is not limited to this.
- the second direction is a direction in which the first opening and the second opening communicate with each other, and may be any direction that intersects the first direction in parallel with the upper surface of the mounting substrate.
- the second direction may be a direction that intersects the first direction at an angle greater than 0 ° and less than 90 °.
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Abstract
Description
<実施の形態1>
(照明装置100の構成)
照明装置100の構成及び設置例を示す一部断面図(図1)のように、照明装置100(以下、単に「装置100」と称する。)は、照明器具1と、板バネ状の掛止部材3と、照明器具1を点灯させる電源ユニット4とを備えてなる。照明器具1は配線23により電源ユニット4と電気接続されている。掛止部材3は照明器具1に取着される。実施の形態1では、装置100を天井に埋設するダウンライトとしている。
(照明器具1の構成)
照明器具1の内部構成を示す分解図(図3)に示すように、照明器具1(以下、単に「器具1」と称する。)は、ベース10と、実装基板20と、反射部材30と、導光板40と、拡散カバー50とを有してなる。器具1は円盤状の全体形状を有する。ベース10と、実装基板20と、反射部材30と、導光板40と、拡散カバー50の各外周形状は、照明器具1の全体形状に合わせて円形に形成される。
[ベース10]
ベース10は放熱特性に優れる材料、例えばアルミダイキャスト材料等の金属材料で構成される。ベース10は、中央側が深く周縁側が浅い二段底構造を有する本体部11と、本体部11の周囲に立設されたフランジ部12とを有する(図3)。フランジ部12には切欠部16が存在する。
[実装基板20]
実装基板20は、環状の基板本体21と、基板本体21の上面(図3では反射部材30と対向する面)に実装された複数の発光素子22と、配線23とを有する。
[反射部材30]
反射部材30は、発光素子22からの出射光と導光板40から漏れ出た光とを効率よく導光板40側に反射する目的で配設される、板状部材である。器具1において、反射部材30は実装基板20と導光板40との間に設けられる。反射部材30は、高反射特性を有する材料、例えば高光反射性ポリブチレンテレフタレート(PBT)樹脂、高光反射性ポリカーボネート(PC)樹脂、高光反射性ナイロン樹脂、高光反射性発泡樹脂等を用いて構成される。これらの樹脂材料を用いて反射部材30を射出成形することで、高精度で反射部材30を構成することができる。反射部材30は、少なくともその表面において反射特性を有していれば良い。
[導光板40]
導光板40は、発光素子22の出射光を中心及び逆中心方向に拡散し、拡散カバー50(Z方向)側に面発光させるために用いられる。導光板40は、反射部材30の上方側に配置される。導光板40の材料としては透光性に優れる材料、例えばアクリル樹脂、ポリカーボネート樹脂、ポリスチレン樹脂、ガラス等を挙げられる。これらの材料を用いて導光板40を射出成形することで、反射部材30と同様に、高精度で導光板40を構成できる。従って、反射部材30と導光板40との配置関係では位置ずれ誤差を無視できる程度に小さくできる。導光板40は中央側から外側に向けて、内側導光部41と、入光部42と、外側導光部43とを有する(図3)。導光板40の外径はフランジ部12の内径とほぼ一致させている。導光板40では一例として、内側導光部41、外側導光部43の各上側主面の実装基板20の基板本体21の上面からの高さが同じに設定されている(図4)。また、内側導光部41、外側導光部43の厚みも同一に設定されている。
[拡散カバー50]
拡散カバー50は、導光板40からの出射光をさらに散乱させることにより均一な輝度分布の面発光を得る目的で配設される。拡散カバー50は透光性材料、例えばシリコーン樹脂、アクリル樹脂、ポリカーボネート樹脂、ガラス等を用いて構成される。
(装置100の動作)
以上の構成を有する装置100をユーザが使用する際の動作を説明する。装置100では、電源投入により、商業用電源に接続された電源ユニット4から配線23を介して各発光素子22に電力供給がなされる。これにより各発光素子22から出射光が生ずる。
(装置100で奏される効果)
装置100を駆動させた場合、以下に挙げる諸効果を期待することができる。
[1]発光素子22のチップずれに対する効果
(i)具体的効果
図8は、装置100で中心方向(ここではY方向)に発光素子22のチップずれが生じた場合に奏される効果を説明するための断面図である。
(ii)性能確認試験
装置100を実施例として実際に作製し、意図的に一定間隔でチップずれを生じさせた場合に発生する輝度ムラのパターンとそのときの照度分布について性能確認試験を行った。
[2]第1開口部340による効果
装置100では、発光素子22の出射光が第1開口部340を通過する際、狭い間隔W2を有する一対の端部342A、343Aで出射光が部分的に遮蔽される(図7)。これにより発光素子22の実装位置から第1開口部340を通過する出射光量が過度にならないように規制される。
[3]側壁342、343と端部342A、343Aと入光端部420A、420Bによる効果
装置100では、入光端部420A(420B)と端部342A(343A)との間を通過する発光素子22の出射光(以下、「通過光」と称する。)は、全て反射部材30の側壁342、343の表面で反射され、その後に導光板40の入光部42に入光される(図9(a))。このときに奏される効果を、入光部42周辺の部分断面図(図9(a))と、発光素子22の拡大断面図(図9(b))とを用いて説明する。
[4]第1開口部340及び第2開口部341の併用による効果
装置100では、中心方向と平行な方向において第2開口部341の最大径が第1開口部340の最大径よりも大きい。これにより、第1開口部340を通過する出射光量よりも第2開口部341を通過する出射光量を比較的豊富にすることができる。
<その他の実施の形態>
本発明のその他の実施の形態について、図14(a)~(d)を用いて実施の形態1との差異を中心に説明する。なお、以下で単に開口径と記載した際は、第1開口部と第2開口部の連通方向に直交する方向の開口径(周縁端部間の距離)を意味している。
<その他の事項>
本発明に係る照明装置は、天井に埋設するシーリングライトに限定されない。その他の設置方法で設置されるシーリングライトの他、ダウンライト、バックライトなど照明用途全般に広く利用可能である。
2 天井
4 回路ユニット
10 ベース
20 実装基板
21 基板本体
22 発光素子
30、945、945X 反射部材
31 内側反射部
32 凹入部
33 外側反射部
34、34A~34D 開口
40、40A、940、940X 導光板
41 内側導光部
42、42A、941、946X 入光部
43 外側導光部
50、50X 拡散カバー
51 本体部
100、900、910 照明装置
220 素子本体
221 素子筐体
310、320 反射部材の上面
340、340A~340D 第1開口部
341、341A~341D 第2開口部
342、343 側壁
342A、343A 一対の端部
344 周縁端部
420、420C、947X 素子対向面
420A、420B 入光端部
422A、422B、941a、948X、949X 傾斜面
423 境界部
424A、424B、950X、951X 側面部
Claims (15)
- 上面に少なくとも1つの発光素子が実装された実装基板と、前記実装基板の上面を覆う位置に配置され、前記発光素子の出射光を導光する導光板と、前記実装基板と前記導光板との間に設けられ、厚み方向に貫通し前記発光素子の少なくとも一部を露出させる開口が存在する板状部材とを備える照明装置であって、
前記導光板は前記開口の上方に配置され、前記発光素子の出射光が入射する入光部を有し、
前記入光部は前記発光素子と対向して設けられた素子対向面と、前記導光板の上面側において、前記実装基板の上面と平行な第1方向に沿って、前記素子対向面から遠ざかるにつれて前記実装基板の上面に対する傾斜角度が漸減する傾斜面とを有し、
前記板状部材は、前記開口を囲む周縁端部を有し、
前記板状部材の前記周縁端部は、前記第1方向に沿って前記開口を挟み、且つ前記導光板を平面視した場合に前記素子対向面と重なる一対の部分を有する、
照明装置。 - 前記板状部材は上面を凹入させてなる凹入部を有し、前記凹入部の内部に前記開口が存在し、
前記入光部が、前記開口側へ突出する一部を有し、前記突出する一部が前記凹入部に挿入されている
請求項1に記載の照明装置。 - 前記板状部材は前記凹入部の内部において前記一対の部分から立ち上がる側壁を有し、且つ前記側壁は、前記実装基板の上面と直交し前記一対の部分を通る仮想平面で切った断面において、前記一対の部分の一方と、これに近接する前記素子対向面の端部とを結ぶ直線上に配置されている
請求項2に記載の照明装置。 - 前記第1方向に沿って、前記側壁と前記素子対向面との間に空間が確保されている
請求項3に記載の照明装置。 - 前記板状部材は、前記発光素子の光を反射する反射部材である
請求項1~4のいずれかに記載の照明装置。 - 前記入光部は、さらに、前記導光板の上面側において前記第1方向に沿った両側に、前記素子対向面から遠ざかるにつれて前記実装基板の上面に対する傾斜角度が漸減する傾斜面を有する
請求項1~5のいずれかに記載の照明装置。 - 前記開口は、前記一対の部分に挟まれた第1開口部と、前記実装基板の上面と平行に前記第1方向と交差する第2方向に沿って前記第1開口部に連通し且つ前記第1方向と平行な方向において前記第1開口部の最大径よりも最大径が大きい第2開口部とを有し、
前記第1開口部の上方に前記入光部が配置されている
請求項1~6に記載の照明装置。 - 前記第2方向が前記第1方向と直交する方向であり、前記第1開口部を挟んだ両側に一対の前記第2開口部が連通して存在する
請求項7に記載の照明装置。 - 前記発光素子が複数存在し、当該複数の発光素子が互いに間隔をおいて前記実装され、
前記第2開口部は隣接する前記発光素子の間隙の上方に存在する
請求項7または8のいずれかに記載の照明装置。 - 前記複数の発光素子は前記実装基板の上面において円周状に前記実装され、
前記入光部は、前記複数の発光素子の上方を結ぶように連続的に形成されている
請求項9に記載の照明装置。 - 前記導光板は円盤状であり、前記入光部より内側に位置する内側導光部と、前記入光部より外側に位置する外側導光部とを有する
請求項10に記載の照明装置。 - 前記内側導光部と前記外側導光部の各上側主面の前記実装基板上面からの高さが同じであり、
前記内側導光部と前記外側導光部の厚みが同一である
請求項11に記載の照明装置。 - 前記板状部材と前記導光板とは射出成形されている
請求項1~12のいずれかに記載の照明装置。 - 前記発光素子はLED素子である
請求項1~13のいずれかに記載の照明装置。 - 前記発光素子に電力供給するための電源装置を有する
請求項1~14のいずれかに記載の照明装置。
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DE112013005914.2T DE112013005914T5 (de) | 2012-12-11 | 2013-11-20 | Beleuchtungsvorrichtung |
CN201390000939.7U CN204805985U (zh) | 2012-12-11 | 2013-11-20 | 照明装置 |
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JP2012-270693 | 2012-12-11 | ||
JP2012270693A JP5740560B2 (ja) | 2012-12-11 | 2012-12-11 | 照明装置 |
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JP (1) | JP5740560B2 (ja) |
CN (1) | CN204805985U (ja) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11307455B2 (en) | 2019-09-25 | 2022-04-19 | Nichia Corporation | Light-emitting module having array of light sources, some aligned and others offset with array of lense structures |
TWI856889B (zh) | 2022-12-06 | 2024-09-21 | 日商松下知識產權經營股份有限公司 | 照明器具 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108430830B (zh) * | 2015-12-24 | 2021-09-10 | 林特琅普股份有限公司 | 车辆用照明装置 |
CN207471460U (zh) * | 2017-10-27 | 2018-06-08 | 漳州立达信光电子科技有限公司 | Led灯具 |
CN111742383B (zh) * | 2018-02-22 | 2023-05-23 | 京瓷Avx元器件公司 | 包括具有减少泄漏的超级电容器的电路 |
JP7078865B2 (ja) * | 2019-09-25 | 2022-06-01 | 日亜化学工業株式会社 | 発光モジュール |
Citations (3)
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JP2004031064A (ja) * | 2002-06-25 | 2004-01-29 | Kawaguchiko Seimitsu Co Ltd | バックライト装置 |
JP2007329089A (ja) * | 2006-06-09 | 2007-12-20 | Yuka Denshi Co Ltd | 発光ユニット |
JP2012138255A (ja) * | 2010-12-27 | 2012-07-19 | Sony Corp | 面発光装置および表示装置 |
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JP2012104476A (ja) * | 2010-10-12 | 2012-05-31 | Toshiba Lighting & Technology Corp | 照明装置 |
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- 2012-12-11 JP JP2012270693A patent/JP5740560B2/ja active Active
-
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- 2013-11-20 CN CN201390000939.7U patent/CN204805985U/zh not_active Expired - Fee Related
- 2013-11-20 WO PCT/JP2013/006826 patent/WO2014091686A1/ja active Application Filing
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JP2004031064A (ja) * | 2002-06-25 | 2004-01-29 | Kawaguchiko Seimitsu Co Ltd | バックライト装置 |
JP2007329089A (ja) * | 2006-06-09 | 2007-12-20 | Yuka Denshi Co Ltd | 発光ユニット |
JP2012138255A (ja) * | 2010-12-27 | 2012-07-19 | Sony Corp | 面発光装置および表示装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11307455B2 (en) | 2019-09-25 | 2022-04-19 | Nichia Corporation | Light-emitting module having array of light sources, some aligned and others offset with array of lense structures |
TWI856889B (zh) | 2022-12-06 | 2024-09-21 | 日商松下知識產權經營股份有限公司 | 照明器具 |
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DE112013005914T5 (de) | 2015-09-17 |
JP5740560B2 (ja) | 2015-06-24 |
JP2014116235A (ja) | 2014-06-26 |
CN204805985U (zh) | 2015-11-25 |
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