WO2016121197A1 - Light-distributing plate and illumination apparatus - Google Patents

Abstract

The present invention achieves a light-distributing plate and an illumination apparatus that, in addition to being reduced in height, make it possible to keep one part of the light-distributing plate from becoming excessively bright, even when the intensity of illumination light that is generated by a light source is high. A tabular light-distributing plate 51 that diffuses, toward an outer-circumferential-surface side, illumination light that is received at an incidence part 78 from a light source 23, and that is provided with a plurality of diffusion-obstructing parts 55a, 55b that comprise a recess that is formed in at least one of a front surface 51b and a rear surface 51a or that comprise a through hole that passes between the front surface and the rear surface and that are positioned between the incidence part and the outer circumferential surface.

Description

Light distribution plate and lighting fixture

The present invention relates to a light distribution plate and a lighting fixture using a semiconductor light emitting element (LED) or the like.

As a light distribution plate that transmits illumination light generated by a luminaire using a semiconductor light emitting element (LED) while diffusing it, for example, the one shown in FIG.
This light distribution plate is substantially flat and rectangular. At the center of the light distribution plate, there is formed an incident portion through which the illumination light of the luminaire enters from one surface of the light distribution plate (the lower surface in FIG. 20). The incident portion is formed with a diffusion structure (not shown) for diffusing the illumination light incident on the incident portion radially along a direction orthogonal to the thickness of the light distribution plate. Further, an emission structure (not shown) for emitting illumination light diffused by the diffusion structure to the outside from the other surface (the upper surface in FIG. 20) of the light distribution plate is formed inside the light distribution plate. Therefore, when the illumination light of the LED is supplied to the incident portion, the incident illumination light is diffused to the outer peripheral surface side of the light distribution plate by the diffusion structure, and further emitted to the outside from the other surface by the emission structure.

However, when the luminance of the illumination light emitted from the LED is low, the central part of the long side (A part of FIG. 20) or the central part of the short side (B part of FIG. 20) of the light distribution plate having a short linear distance from the incident part. ) Can supply a sufficient amount of illumination light, but it is difficult to supply a sufficient amount of illumination light to the four corners (C portion in FIG. 20) of the light distribution plate having a long linear distance from the incident portion. Therefore, luminance unevenness is likely to occur in the illumination light emitted from the other surface of the light distribution plate (C portion is likely to be darker than A portion and B portion).

However, recent LEDs can emit high-luminance illumination light due to technological improvements. Therefore, if illumination light generated by such a lighting device using high-performance LEDs is supplied to the incident portion of the light distribution plate, a sufficient amount of illumination light can be supplied not only to the A portion and the B portion but also to the C portion. Therefore, bright illumination light can be emitted from the entire other surface of the light distribution plate.

JP 2006-114863 A JP 2009-44016 A JP 2012-4078 A Japanese Patent No. 4357508 Japanese Patent No. 4568194

However, if a lighting fixture capable of supplying a sufficient amount of illumination light to C part is used, for example, too much illumination light is supplied to A part, and as a result, it is emitted from A part to the outside of the light distribution plate. The brightness of the illumination light may be too high. In addition, luminance unevenness corresponding to the distance from the incident part to each part also occurs between the A part, the B part, and the C part.

On the other hand, in the development of lighting fixtures using light distribution plates, low profile is one of the issues.

An object of the present invention is to provide a light distribution plate and a luminaire that can reduce the height and can suppress a part of the light distribution plate from becoming excessively bright even when the luminance of the illumination light generated by the light source is high. It is to provide.

The light distribution plate of the present invention is a flat light distribution plate that diffuses illumination light incident on the incident portion from the light source toward the outer peripheral surface, and is a recess formed on at least one of the front surface and the back surface, or the front surface and the back surface. And a plurality of diffusion-inhibiting portions that are located between the incident portion and the outer peripheral surface.

The light distribution plate may have a rectangular front shape.
In this case, the diffusion inhibiting portion may be provided on at least one straight line connecting at least one of the long side and the short side constituting the rectangular outer shape and the incident portion.

The circular arc shape centering on the incident part may be sufficient as the diffusion inhibiting part.

An interval gradually changing portion that gradually decreases as the distance between the front surface and the back surface moves toward the outer peripheral surface may be formed in a portion located on the outer peripheral surface side from the diffusion inhibiting portion of the light distribution plate.

The lighting fixture of the present invention includes the light distribution plate and the light source.

The light source includes a semiconductor light emitting element, a base member having an attachment surface to which the semiconductor light emitting element is attached, and is coupled to the base member and positioned on the outer peripheral side of the attachment surface. And a resin molding part having a recess or a through hole for attaching a light distribution member to which an engaging part of the light distribution member that distributes the emitted light is engaged, and the base member has the distribution of the resin molding part. An engaging portion retracting portion for retracting the engaging portion of the light distribution member engaged with the recess for attaching the optical member or the through hole can be provided.

The engaging portion retracting portion of the base member can be constituted by a retracting cutout portion.

The retraction cutout portion of the base member can have an R shape in which a part of the periphery of the base member is opened.

The engaging portion retracting portion of the base member can be constituted by a retracting recess.

The engaging portion retracting portion of the base member can be constituted by a retracting through hole.

The engagement portion retracting portion of the base member enters an inside of the light distribution member mounting recess or through hole of the resin molding portion and faces the engagement portion of the light distribution member. Can have.

The engaging portion facing portion of the base member can be opposed to the engaging portion of the light distribution member as a double bottom overlapped with the light distribution member mounting recess of the resin molding portion. .

The combined body of the base member and the resin molded portion has a substantially rectangular shape when seen in a plan view, and a concave portion or a through hole for attaching the light distribution member of the resin molded portion, and engagement of the base member The part evacuation part can be provided at a position corresponding to each other in the peripheral part of the substantially rectangular shape in plan view.

The lighting fixture according to the present invention includes the engaging portion that distributes light emitted from the semiconductor light emitting element and is engaged with the concave portion or the through hole for attaching the light distribution member of the resin molded portion. It can further have a light distribution member.

The light distribution member is positioned with respect to a combined body of the base member and the resin molding portion by engaging the engagement portion with a recess or a through hole for attaching the light distribution member of the resin molding portion. Can.

The resin molding portion includes a connector housing portion that accommodates a connector that is electrically connected to the semiconductor light emitting element from the outside and has a fixing hole formed therein, and the light distribution member is housed in the connector housing portion. It can have a positioning pin for positioning with respect to the connector by being engaged with the fixing hole of the connector.

The light distribution member may have a clog-like support portion having a tip contact surface that contacts a facing surface of a chassis member laminated on the lighting fixture.

The light distribution member has a cylindrical protrusion formed with a tip contact surface that contacts a facing surface of a chassis member stacked on the lighting fixture, and a female screw is provided on the tip contact surface of the cylindrical protrusion. A through hole for a screw is formed on the opposite surface of the chassis member, and the female screw hole and the screw through hole are aligned with each other from the opposite side of the chassis member. By screwing a screw inserted into the screw through hole into the female screw hole, the lighting fixture and the chassis member can be fixed in a laminated state.

The resin molding portion has at least two connector housing portions that house at least two connectors that are electrically connected to the semiconductor light emitting element from the outside, and the at least two connectors housed in the at least two connector housing portions. Can be arranged such that the extending directions of at least two cables connected to the at least two connectors are different from each other.

The extending direction of the at least two cables can be set to a perpendicular relationship without crossing each other.

ADVANTAGE OF THE INVENTION According to this invention, while aiming at low profile, even if it is a case where the brightness | luminance of the illumination light which a light source generate | occur | produces is high, the light distribution plate and lighting fixture which can suppress that a part of light distribution plate becomes too bright too much. can get.

It is a disassembled perspective view of the liquid crystal display device which is one Embodiment of this invention. It is a front view of a lighting fixture. (A) is a cross-sectional view taken along the line III-III in FIG. 2, and (b) is an enlarged view of part b in (a). (A) is sectional drawing which follows the IV-IV arrow line of FIG. 2, (b) is an enlarged view of the b section of (a). (A) is a rear view of a lighting fixture, (b) is a partial enlarged view of (a). It is the disassembled perspective view seen from the front side of the lighting fixture. It is the disassembled perspective view seen from the back side of the lighting fixture. (A) is sectional drawing which follows the VIII-VIII arrow line of FIG. 6, (b) is an enlarged view of the b section of (a). (A) is the perspective view seen from the front side of the illumination light control unit, (b) is the perspective view seen from the back side of the illumination light control unit. It is the disassembled perspective view seen from the front side of the illumination light control unit. It is the disassembled perspective view seen from the back side of the illumination light control unit. It is the expanded sectional view cut | disconnected in the position which passes along the center part of an illumination light incident member. It is a perspective view of an LED module. It is a perspective view of a cable with a connector. It is the perspective view seen from the direction different from FIG. 14 of the cable with a connector. It is the expansion perspective view seen from the center part of the light distribution plate in a mutually separated state, and the front side of an LED module. It is the expansion perspective view seen from the center part of the light distribution plate in a mutually separated state, and the back side of an LED module. It is a figure showing the LED module and the cable with a connector connected to one connector connecting groove of the LED module. It is typical sectional drawing of a liquid crystal display device. It is the perspective view seen from the front side of the light distribution board of a comparative example. 21A is a perspective view of a single structure of the heat sink (base member) as viewed from above, and FIG. 21B is a diagram in which a conductive plate (conductive member) is fitted to the heat sink (base member) of FIG. FIG. FIG. 22A is a perspective view of a single structure of the heat sink (base member) as viewed from below, and FIG. 22B is a diagram in which a conductive plate (conductive member) is fitted to the heat sink (base member) of FIG. FIG. It is a bottom view which shows the structure of a lighting fixture (semiconductor light emitting element module). FIG. 24 is a cross-sectional view taken along the line XXIV-XXIV in FIG. 23. FIG. 24 is a cross-sectional view taken along the line XXV-XXV in FIG. 23. FIG. 24 is a cross-sectional view taken along the line XXVI-XXVI in FIG. 23. It is a figure which shows another embodiment of the engaging part retracting part of a heat sink (base member). It is a figure which shows another embodiment of the engaging part retracting part of a heat sink (base member). It is a figure which shows another embodiment of the engaging part retracting part of a heat sink (base member). It is a figure which shows another embodiment of the engaging part retracting part of a heat sink (base member).

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
In this embodiment, the light distribution means 50 is used as a part of the liquid crystal display device 10.
The liquid crystal display device 10 includes a liquid crystal panel 11, a metal chassis 12 (chassis member, heat dissipation plate), and a lighting fixture (semiconductor light emitting element module) 15 as major components. The liquid crystal panel 11 and the chassis 12 are both rectangular, and their front shapes are substantially the same. A cable through hole 12a is formed near the center of the chassis 12 (see FIG. 19). Further, the chassis 12 has four screw through holes (not shown). In the liquid crystal display device 10, the liquid crystal panel 11, the chassis 12, and the lighting fixture 15 are laminated and integrated in the thickness direction of each member (vertical direction in FIG. 1) in the order of the liquid crystal panel 11, the chassis 12, and the lighting fixture 15. (See FIG. 19).

The lighting fixture (semiconductor light emitting element module) 15 includes an LED module 20 and a light distribution means 50.
As shown in FIG. 13, FIG. 16, FIG. 17, etc., the LED module 20 includes an LED holder 21 whose overall shape is a substantially rectangular parallelepiped (front shape is substantially square). The LED holder 21 is made of an insulating material such as resin. One circular recess 22 is formed on one surface of the LED module 20, and connector connection grooves (connector housing portions) 25 and 26 are formed at two corners located on the diagonal of the LED holder 21. It is. A large number (36 in the illustrated embodiment) of LEDs 23 (semiconductor light emitting elements, light sources) are fixed to the surface of the circular recess 22. Further, on the surface of the circular recess 22, a reflective film 24 is formed so that each LED 23 is avoided and titanium oxide (TiO 2) or the like is mixed as a colorant with a polyurethane resin as a main component and has insulation as a whole. is there. A metal anode 25a and a cathode 25b are integrally provided on the inner surface of the connector connecting groove 25, and a metal anode 26a and a cathode 26b are integrally provided on the inner surface of the connector connecting groove 26. The anode 25a and the cathode 25b and the anode 26a and the cathode 26b are connected (electrically) to the anode and the cathode of each LED 23, respectively. Further, the LED holder 21 is formed with four mounting recesses 27 or mounting through holes 27 ′ (recesses or through holes for mounting the light distribution member) located on the outer peripheral side of the circular recess 22 (illustrated implementation). In the embodiment, the mounting through-hole 27 'is drawn, but this may be used as a bottom with the mounting recess 27). A metal heat sink 28 is fixed to the surface of the LED holder 21 opposite to the circular recess 22.

More specifically, the LED module 20 is a plane in which a metal heat sink (base member) 28, a metal conduction plate (conduction member) 29, and an LED holder 21 that is a resin molded portion are combined as constituent elements. It consists of an integrally molded product that is substantially rectangular when viewed. FIGS. 21A and 22A show a single structure of the heat sink 28, and FIGS. 21B and 22B show a state in which a conductive plate 29 is fitted to the heat sink 28 (each The LED holder 21 is not drawn in the figure). The connector connecting grooves 25 and 26 and the mounting recess 27 or mounting through hole 27 ′ described above are components formed in the LED holder 21.

On one surface (upper surface) of the heat sink 28, a circular mounting surface 28A to which the LED 23 is mounted is formed to project. A circular recess 22 of the LED module 20 is formed by the circular mounting surface 28A of the heat sink 28 and the inner cylindrical surface of the LED holder 21 surrounding the circular mounting surface 28A. The heat sink 28 is positioned at two opposing cutout portions (engagement portion retracting portions) 28B located on two opposite sides of the peripheral edge of the rectangular rectangle in plan view, and two opposing corners of the peripheral edge of the rectangular rectangle in plan view. There are two retraction cutout portions (engagement portion retraction portions) 28C. The evacuation cutout portion 28B and the evacuation cutout portion 28C have an R shape in which a part of the peripheral edge of the heat sink 28 is opened.

The conductive plate 29 is formed by stamping a metal flat plate having excellent conductivity, thermal conductivity, and rigidity, such as brass, beryllium copper, and Corson copper alloy. The conduction plate 29 depicted in FIG. 21B is composed of a plurality of members, and the plurality of members are originally formed as an integrally molded product connected by a carrier portion or a connection bridge. When the conductive plate 29 is fitted to the heat sink 28 and coupled (integrated) by the LED holder 21, the carrier portion and the connection bridge are cut and separated into a plurality of members. The conduction plate 29 has a circular hole 29A that fits on the outer periphery of the circular mounting surface 28A of the heat sink 28 (FIG. 21B). The conduction plate 29 has a pair of first conductive portions 29B and a second conductive portion 29C that are located around the circular hole 29A and are electrically connected to the LED 23 attached to the attachment surface 28A of the heat sink 28. The conductive plate 29 includes two engagement holes 29D positioned on two opposite sides of the peripheral edge of the rectangular shape in plan view, and two engagement holes 29E positioned on two opposing corner portions of the peripheral edge of the rectangular shape in plan view. have.

As shown in FIGS. 23 to 26, in the LED module 20 (lighting fixture 15) in which the heat sink 28, the conductive plate 29, and the LED holder 21 are integrally formed, each of the four mounting recesses 27 or the mounting through holes 27 ′ A total of four engagement holes 29D and 29E, and a total of four retraction cutouts 28B and 28C are overlapped at positions corresponding to each other on the peripheral edge of the substantially rectangular shape in plan view (up and down). Communicate in the direction).

A cable 32 with a connector and a relay connector 42 can be connected (accommodated) to the connector connection groove 25 and the connector connection groove 26 of the LED module 20, respectively.
The cable 32 with a connector shown in FIGS. 14 and 15 and the like is obtained by integrating two cables 33 and a connector 36. The flexible cable 33 includes an electric wire 34 in which a large number of metal wires are bundled and an insulating material and a tube-like coating 35 that covers the surface of the electric wire 34. The wire 34 is exposed by removing the coating 35 at both ends. The connector 36 includes an insulator 37 made of an insulating material, and a first contact 38 and a second contact 39 made of metal. The tip of the insulator 37 constitutes a fitting protrusion 37a. The first contact 38 is connected to one end of one electric wire 34, and the second contact 39 is connected to one end of the other electric wire 34. The extending direction of the cable 33 (the connector 36 side end) of the cable with connector 32 and the extending direction of the first contact 38 and the second contact 39 (the protruding direction of the fitting protrusion 37a) are substantially parallel to each other.
The relay connector 42 shown in FIGS. 16 and 17 has an insulator 43 made of an insulating material, a first contact 38 (not shown), and a second contact 39 (not shown). The insulator 43 includes a fitting protrusion 37a (see FIG. 16). Further, the insulator 43 has a pair of fixing holes 44 penetrating the insulator 43 in a direction orthogonal to the extending direction of the first contact 38 and the second contact 39 (the protruding direction of the fitting protrusion 37a). It is. Further, the relay connector 42 is provided with a connection hole 45. One end of the two cables 33 can be detachably fitted into the connection hole 45. When the cable 33 is fitted into the connection hole 45, one end of one electric wire 34 is connected to the first contact 38 of the relay connector 42, and one end of the other electric wire 34 is connected to the second contact 39. The extension direction of the cable 33 (the end portion on the relay connector 42 side) connected to the relay connector 42 is substantially orthogonal to the extension direction of the first contact 38 and the second contact 39 (projection direction of the fitting projection 37a). ing.

As shown in FIGS. 18 and 19, the cable 32 with a connector can be attached to and detached from the LED module 20 by fitting the fitting projection 37 a of the connector 36 into the connector connecting groove 25. When the cable 32 with a connector is attached to the LED module 20, the first contact 38 and the second contact 39 of the connector 36 are connected to the anode 25 a and the cathode 25 b of the connector connection groove 25, respectively. It is substantially orthogonal to the thickness direction of the LED holder 21). The relay connector 42 can be attached to and detached from the LED module 20 by fitting the fitting projection 37a of the insulator 43 into the connector connection groove 26 (see FIG. 16). When the relay connector 42 is attached to the LED module 20, the first contact 38 and the second contact 39 of the relay connector 42 are connected to the anode 26 a and the cathode 26 b of the connector connection groove 26, respectively, and the extension direction of the cable 33 is the LED module 20 ( It becomes substantially parallel to the thickness direction of the LED holder 21) (substantially orthogonal to the cable 33 of the cable 32 with connector) (see FIG. 19). That is, the connector-attached cable 32 and the relay connector 42 (two connectors) connected to one and the other of the connector connection groove 25 and the connector connection groove 26 are connected to the extension direction of the cable 33 connected to the connector-attached cable 32 and the relay. The cables 33 connected to the connector 42 are arranged so that the extending directions thereof are different from each other. More specifically, the extending direction of the cable 33 connected to the connector-attached cable 32 and the extending direction of the cable 33 connected to the relay connector 42 are in a positional relationship orthogonal to each other without intersecting each other.

The light distribution means 50 includes a light distribution plate (light distribution member) 51, an illumination light incident member 76, a light amount adjustment member 84, a light amount adjustment sheet 86, and screws 90.
The light distribution plate 51 is a substantially flat integrally formed product made of a translucent material (for example, a resin such as glass or acrylic), and the front shape is a rectangle that is substantially the same as the liquid crystal panel 11 and the chassis 12. The rear surface 51a (the lower surface in FIG. 1; the surface facing the chassis 12) of the light distribution plate 51 is constituted by a flat surface. On the other hand, the surface 51b of the light distribution plate 51 (the upper surface in FIG. 1; the surface facing the liquid crystal panel 11) is not a perfect plane but has a level difference at each portion.
The central portion of the surface 51b of the light distribution plate 51 is configured by a central flat portion 52 that is long in the direction of the long side 51L of the light distribution plate 51 and whose both end portions are semicircular. The central plane portion 52 is a plane parallel to the back surface 51a. An outer peripheral side facing portion 53 having an annular shape is formed in the central portion of the central plane portion 52 so as to be concentric with the central plane portion 52. As shown in the drawing, the surface 51b of the outer peripheral side facing portion 53 is a plane that is one step lower than the surface 51b of the central flat portion 52 (located on the back surface 51a side) and parallel to the back surface 51a. Further, on the inner peripheral side of the outer peripheral facing portion 53, a fitting hole 54 having a circular cross section that penetrates the light distribution plate 51 in the thickness direction and is concentric with the outer peripheral facing portion 53 is formed. As shown in detail in FIG. 16, on the surface 51b of the outer peripheral side facing portion 53, four arcuate diffusion-inhibiting portions 55a and 55b centering on the fitting hole 54 (and an incident portion 78 described later) are recessed. It is. Specifically, a pair of diffusion inhibiting portions 55a positioned on a straight line connecting the pair of long sides 51L of the light distribution plate 51 and the center of the fitting hole 54, and the pair of short sides 51S of the light distribution plate 51 and the fitting hole. And a pair of diffusion inhibiting portions 55b located on a straight line connecting the centers of 54. The diffusion inhibiting portions 55a and 55b are provided at equiangular intervals (90 ° intervals) in the circumferential direction around the fitting hole 54. Further, four recesses 56 for mounting legs having a circular cross section are provided on the surface 51b of the outer peripheral side facing portion 53, which are located between the respective diffusion inhibiting portions 55a and 55b and the outer peripheral edge portion of the outer peripheral side facing portion 53. It is. Four LED module support portions 57 protrude from the inner peripheral surface of the outer peripheral side facing portion 53 (the inner surface of the fitting hole 54) in a manner located between the center of the fitting hole 54 and the diffusion inhibiting portions 55a and 55b. It is set up. An end portion of the LED module support portion 57 on the back surface 51 a side is constituted by a columnar support protrusion (engagement portion, engagement pin) 58. Further, four positioning pins 59 located on the outer peripheral side of the fitting hole 54 (and the mounting leg recess 56) protrude from the back surface 51a.
A portion of the surface 51b adjacent to the central plane portion 52 is configured by a first inclined portion 64 having a front surface that is annular (substantially elliptical). As shown in FIG. 8, the distance (the thickness of the light distribution plate 51) between the front surface 51b and the back surface 51a of the first inclined portion 64 is a radial distance from the fitting hole 54 (centering on the fitting hole 54). As it gets longer, it gets smaller gradually. That is, the 1st inclination part 64 is comprised by the flat surface non-parallel to the back surface 51a.
A portion of the surface 51b adjacent to each first inclined portion 64 from the outer peripheral side is composed of a pair of outer peripheral planes 66 and one outer peripheral plane 67. The outer peripheral side plane 66 and the outer peripheral side plane 67 are planes that are one step lower than the front surface 51 b of the central flat portion 52 (located on the rear surface 51 a side) and parallel to the rear surface 51 a and the central flat portion 52.
The portions adjacent to the outer peripheral side plane 66 and the outer peripheral side plane 67 of the surface 51b from the outer peripheral side, that is, the four corners of the light distribution plate 51 are configured by second inclined portions 69, respectively. As shown in FIG. 8, the second inclined portion 69 is configured by a plane non-parallel to the back surface 51a, and the distance (the thickness of the light distribution plate 51) between the front surface 51b and the back surface 51a of the second inclined portion 69 is fitted. As the radial distance from the joint hole 54 (centered on the fitting hole 54) becomes longer, it gradually decreases. That is, in the portion (four corners) corresponding to the second inclined portion 69 of the light distribution plate 51, the interval gradually changes such that the distance (plate thickness) between the front surface 51b and the back surface 51a gradually decreases toward the outer peripheral surface side of the light distribution plate 51. Part 51c is configured.
As shown in FIGS. 1, 2, 6, and the like, female screw holes 70 that penetrate the light distribution plate 51 in the thickness direction are formed at four locations corresponding to the first inclined portion 64 of the light distribution plate 51. . Further, as shown in FIGS. 3, 4, 5, and 7, cylindrical projections 71 project from portions corresponding to the respective female screw holes 70 on the back surface 51a. Each female screw hole 70 is also formed on the inner peripheral surface of each cylindrical protrusion 71.
As shown in FIGS. 3, 5, 7, etc., a large number of conical recesses 73 are formed in the entire portion located on the outer peripheral side of the portion corresponding to the outer peripheral side facing portion 53 of the back surface 51 a. As shown in FIG. 5 and the like, a triangle located between one short side 51S of the light distribution plate 51 (left side in FIG. 5) and a cylindrical protrusion 71 (female screw hole 70) provided in the vicinity of the short side 51S. In the shape region (a part of the short side 51S constitutes the base of the triangle), a conical recess 73 is formed at a higher density than other regions.

The illumination light incident member 76 is a substantially disc-shaped integrally formed product made of a light-transmitting material (for example, a resin such as glass or acrylic). However, the transmittance of light (illumination light generated by the LED 23 of the LED module 20) is lower than that of the light distribution plate 51. The illumination light incident member 76 includes, as large components, a disc-shaped flange 77 and an incident portion 78 having a conical shape with a smaller diameter than the flange 77 protruding from the center of one surface of the flange 77. is doing. The surface (conical surface) of the incident portion 78 is provided with a reflective coating (a coating in which titanium oxide is mixed, a half mirror, or the like). The light transmittance of this reflective coating is lower than that of the light distribution plate 51. The transmittance of the illumination light incident member 76 may be the same as or higher than that of the light distribution plate 51, and a reflective coating may be formed on the conical surface, or the transmittance of the illumination light incident member 76 may be lower than that of the light distribution plate 51. In addition, the reflective coating may be omitted.
A side surface opposite to the incident portion 78 of the flange portion 77 is formed by a flat surface, and a circular receiving recess 80 concentric with the flange portion 77 and the incident portion 78 is provided in the center of the opposite side surface. The bottom surface of the receiving recess 80 is formed by a plane parallel to the opposite side surface of the flange 77. At the center of the bottom surface of the receiving recess 80, a female screw hole 81 is formed so that the end on the back side extends to the inside of the incident portion 78. On the surface of the flange portion 77 on the incident portion 78 side, four mounting legs 82 that are located on the outer peripheral side of the incident portion 78 and have a cylindrical shape protrude in the circumferential direction at equal angular intervals. The outer diameter of the flange portion 77 is substantially the same as that of the outer peripheral facing portion 53, and the outer diameter of the incident portion 78 is substantially the same as the inner diameter of the fitting hole 54.

A central through hole 85 is formed at the center of a disk-shaped light amount adjusting member 84 made of a metal plate. The outer shape of the light amount adjusting member 84 is substantially the same as the shape of the inner peripheral surface of the receiving recess 80, and the thickness of the light amount adjusting member 84 is substantially the same as the depth of the receiving recess 80.
The transmittance of light from the light amount adjusting member 84 (illumination light generated by the LED 23 of the LED module 20) is lower than that of the light distribution plate 51 and the illumination light incident member 76. Since the light amount adjusting member 84 of the present embodiment is made of metal, light (illumination light generated by the LED 23 of the LED module 20) cannot be transmitted.

The light amount adjusting sheet 86 is a substantially disc-shaped integrally formed product made of a translucent material (for example, glass or resin such as acrylic or PET (polyethylene terephthalate) film). As shown in the drawing, the outer shape of the light amount adjusting sheet 86 is smaller than the illumination light incident member 76 and larger than the light amount adjusting member 84. The light amount adjustment sheet 86 converts illumination light that has entered the light amount adjustment sheet 86 from one surface (the surface on the light amount adjustment member 84 side) of the light amount adjustment sheet 86 into the other surface (the surface opposite to the light amount adjustment member 84). ) To diffuse and emit. However, the other surface of the light amount adjusting sheet 86 is coated with one light shielding portion 87 and a large number of light shielding portions 88 (by means such as printing). The light shielding portion 87 is a circular shape (large diameter) formed at the center of the light amount adjustment sheet 86. Each light shielding portion 88 has a circular shape with a smaller diameter than the light shielding portion 87 formed in the outer peripheral side region of the light shielding portion 87. The light shielding part 87 and the light shielding part 88 are made of a light shielding material (for example, polyurethane resin mixed with titanium oxide (TiO 2) or the like as a colorant). A central through hole 89 that penetrates both the light amount adjusting sheet 86 and the light shielding portion 87 is formed in the central portion.

After the light amount adjusting member 84 is inserted into the receiving recess 80 of the illumination light incident member 76, the light amount adjusting sheet 86 is covered with the collar portion 77 and the light amount adjusting member 84, and the center through hole is formed from the outside of the light amount adjusting sheet 86. If the male screw portion 91 of the screw 90 inserted into the 89 and the central through hole 85 is screwed into the female screw hole 81 and the head portion 92 of the screw 90 is pressed against the surface of the light amount adjusting sheet 86, the light distribution plate 51, the illumination light An illumination light control unit 93 that is an integrated body of the incident member 76, the light amount adjusting member 84, the light amount adjusting sheet 86, and the screw 90 is obtained (see FIG. 9 and the like). When the illumination light control unit 93 is viewed from the front, the position of the outer peripheral edge portion of the light shielding portion 87 of the light amount adjustment sheet 86 substantially coincides with the outer peripheral edge portion of the light amount adjustment member 84, and each light shielding portion 88 is the outer periphery of the light amount adjustment member 84. Located on the side.
As shown in FIGS. 3 and 4, the illumination light control unit 93 fits the mounting legs 82 of the illumination light incident member 76 into the corresponding mounting leg recesses 56 of the light distribution plate 51, and The portion (a portion located on the outer peripheral side from the incident portion 78) is placed (contacted) on the bottom surface of the outer peripheral facing portion 53, and the incident portion 78 is fitted into the fitting hole 54 (positioned in the fitting hole 54). By making the outer peripheral side facing portion 53 face the incident portion 78 from the outer peripheral side), the light distribution plate 51 can be detachably mounted.
The LED module 20 integrated with the connector-attached cable 32 and the relay connector 42 is configured to support the four LED module support portions 57 while supporting the two positioning pins 59 in the fixing holes 44 of the insulator 43 (see FIG. By fitting the engagement portions, engagement pins) 58 into the respective attachment recesses 27 or the attachment through holes 27 ′, the attachment can be detachably attached to the rear surface 51a of the light distribution plate 51. . Then, as shown in FIG. 19, the cable 33 of the cable 32 with the connector is substantially parallel to the plane on which the light distribution plate 51 is located, and the cable 33 of the relay connector 42 is substantially orthogonal to the plane. Further, each LED 23 of the LED module 20 faces the incident portion 78 of the illumination light incident member 76 (in the plate thickness direction of the light distribution plate 51) (see FIGS. 3 and 4). When the LED module 20 and the light distribution means 50 (light distribution plate 51, illumination light control unit 93) are integrated in this way, the lighting fixture 15 is completed. When the lighting fixture 15 is viewed in the thickness direction of the light distribution plate 51 in this state, all the LEDs 23 are located on the inner peripheral side of the outer peripheral edge portion (of the connection end portion with the flange portion 77 which is the maximum diameter portion) of the incident portion 78. (See FIGS. 3 and 4). Further, the light amount adjusting member 84 is located on the opposite side of each LED 23 with the illumination light incident member 76 (incident part 78) interposed therebetween.

As shown in FIGS. 23 to 26, in the completed state of the lighting fixture (semiconductor light emitting element module) 15, the support protrusions (engagement portions, engagement pins) 58 of the light distribution plate (light distribution member) 51 are used as LED holders. (Resin molding part) 21 is engaged with the mounting recess 27 or mounting through-hole 27 ′ and the engagement hole 29 D or engagement hole 29 E of the conduction plate (conduction member) 29, and further the heat sink (base member) Retreats (retreats) to the 28 retraction notch (engagement part retraction part) 28B or retraction notch (engagement part retraction part) 28C. Thereby, it becomes possible to suitably realize a combined structure of the heat sink (base member) 28 and the LED holder (resin molding part) 21 and the light distribution plate (light distribution member) 51 (easy to assemble). Further, the light distribution plate (light distribution member) 51 and the lighting fixture (semiconductor light emitting element module) 15 can be reduced in height.

Further, the light distribution plate (light distribution member) 51 engages its own support protrusion (engagement portion, engagement pin) 58 with the mounting recess 27 or the mounting through-hole 27 ′, whereby the heat sink (base member). 28 and the LED holder (resin molding portion) 21 are positioned.

Furthermore, the light distribution plate (light distribution member) 51 is positioned with respect to the relay connector 42 by engaging its positioning pin 59 with the fixing hole 44 of the insulator 43.

As shown in FIG. 24, the light distribution plate (light distribution member) 51 contacts the opposite surface (not shown in FIG. 23) of the chassis (chassis member) 12 stacked on the lighting fixture (semiconductor light emitting element module) 15. It has a clog-like support portion 60 on which a tip contact surface 61 is formed. As a result, the laminated structure of the lighting fixture 15 and the chassis 12 can be stabilized, and the contact stability between the heat sink 28 and the chassis 12 can be ensured (guaranteed). In addition, the shape and arrangement | positioning location of the clog-like support part 60 have freedom. For example, the clog-like support part 60 can be provided so as to surround the peripheral part of the substantially rectangular shape in plan view of the LED module 20 (for example, two L-shapes positioned diagonally). Alternatively, as illustrated in FIG. 8B, the clog-like support portion 60 can be provided intermittently (pinpoint) on the peripheral portion of the back surface 51 a of the light distribution plate (light distribution member) 51.

The lighting fixture 15 and the chassis 12 are connected to the front end surfaces of the four cylindrical projections 71 of the light distribution plate 51 while pulling out the cable 33 of the relay connector 42 to the rear surface of the chassis 12 (opposite to the light distribution plate 51) through the cable through hole 12a. The surface facing the light distribution plate 51 of the chassis 12 is brought into contact with the tip contact surface), and screws (not shown) inserted into the screw through holes from the back side of the chassis 12 are each female screw hole 70 of the light distribution plate 51. Can be fixed in a stacked state (see FIG. 19). Further, when the lighting fixture 15 and the chassis 12 are fixed, the heat sink 28 of the LED module 20 comes into contact with the surface of the chassis 12 facing the heat sink 28 (see FIG. 19).
Further, if the liquid crystal panel 11 is laminated in a fixed state on the surface 51b of the light distribution plate 51, the liquid crystal display device 10 is completed (see FIG. 19).

One cable 33 (electric wire 34) of the cable 32 with connector and the relay connector 42 is connected to the anode of the power source (not shown) and the other cable 33 (electric wire 34) is connected to the cathode of the power source, and the illustration is omitted. When the switch is switched from OFF to ON, the current generated by the power supply is supplied to the LED module 20 (LED 23) via each cable 33, so that each LED 23 emits light. On the other hand, when the switch is switched from ON to OFF, the supply of current to the LEDs 23 is interrupted, so that the LEDs 23 are turned off.
Since the illumination light emitted from each LED 23 of the LED module 20 has high straightness, most of the illumination light from each LED 23 travels toward the incident portion 78 side as shown in FIGS. 3 and 4 (FIGS. 3 and 4). (See arrows A and B in 4). Further, another part of the illumination light emitted from the LED 23 is reflected by the reflective film 24 of the LED module 20 to be directed toward the incident portion 78 (see arrows A and B in FIGS. 3 and 4).

The tip surface of the incident portion 78 (the surface on the LED module 20 side) is a conical surface, and the transmittance of the incident portion 78 (the illumination light incident member 76 and the reflective coating) is lower than that of the light distribution plate 51. Therefore, the traveling direction of the illumination light (including light reflected by the reflective film 24) from the LED module 20 toward the incident part 78 is changed by approximately 90 ° by the tip surface (conical surface, reflective film) of the incident part 78. It progresses radially in front view (see arrow A in FIGS. 3 and 4). Then, the illumination light that has progressed radially enters the inside of the light distribution plate 51 (outer peripheral side facing portion 53) from the inner peripheral surface of the fitting hole 54 (outer peripheral side facing portion 53), and further radiates inside the light distribution plate 51. proceed. And since the illumination light which each LED23 of the LED module 20 generate | occur | produces has high brightness | luminance, illumination light reaches the whole inside of the light distribution board 51. FIG.
However, the light distribution plate 51 is provided with a diffusion inhibiting part 55a and a diffusion inhibiting part 55b. For this reason, a part of the light beam traveling from the incident part 78 toward the pair of long sides 51L and the part of the light beam traveling toward the pair of short sides 51S are inhibited by the diffusion inhibiting part 55a and the diffusion inhibiting part 55b. (See arrow A in FIGS. 3 and 4). Therefore, an excessive amount of illumination light is not supplied to the vicinity of the long side 51L or the vicinity of the short side 51S of the light distribution plate 51 having a short linear distance from the incident part 78. On the other hand, between the interval gradually changing portion 51c (four corners) of the light distribution plate 51 having a long linear distance from the incident portion 78 and the incident portion 78, the progress of the illumination light that diffuses radially inside the light distribution plate 51 is progressed. There are no diffusion inhibiting portions 55a and 55b to inhibit. Moreover, the interval gradually changing portion 51c of the light distribution plate 51 has the smallest thickness among the light distribution plates 51, and the thickness gradually decreases toward each corner (a point where the short side 51S and the long side 51L intersect). Therefore, the luminance (light flux density) of the illumination light that reaches the interval gradually changing portion 51 c (four corners) through the inside of the light distribution plate 51 is not much different from that of other portions inside the light distribution plate 51. Therefore, the illumination light reaches the interval gradually changing portion 51c (four corners) of the light distribution plate 51 with a sufficient amount of light. In this way, the amount of illumination light diffusing inside the light distribution plate 51 is controlled by the diffusion inhibiting portions 55a and 55b (presence / absence), so that a sufficient and non-excessive amount of illumination light is almost entirely in the light distribution plate 51. It will be supplied evenly.

Further, the illumination light diffused inside the light distribution plate 51 is reflected toward the front surface 51b by the surface of the conical recess 73 provided in the back surface 51a of the light distribution plate 51 (see the arrow in FIG. 3). Therefore, illumination light with sufficient brightness is emitted from the entire surface 51 b of the light distribution plate 51.
In addition, since the diffusion inhibiting portions 55a and 55b function to suppress an excessive amount of illumination light from being supplied to the vicinity of the long side 51L and the vicinity of the short side 51S of the light distribution plate 51, It can suppress that the illumination light radiate | emitted on the outer side of the surface 51b from these parts becomes too bright.
Further, since a metal screw is inserted into the female screw hole 70 of the light distribution plate 51, the progress of the illumination light that diffuses radially inside the light distribution plate 51 is likely to be hindered by the screw. That is, the amount of illumination light supplied to the (triangular) region located between the screw (female screw hole 70) and the short side 51S located in the vicinity of the screw is different from that of the other three (however, the remaining three screws). (Excluding areas located between the female screw hole 70 and the short side 51S and the long side 51L located in the vicinity of the screw, respectively). However, since the conical recess 73 is provided in the triangular area of the light distribution plate 51 at a higher density than other parts, the illumination light is directed to the surface 51b side (than other parts) by these conical recesses 73. It is possible to reflect with high efficiency. Therefore, the illumination light emitted from the triangular region to the outside of the surface 51b is not excessively dark compared to other parts.

Further, a part of the illumination light emitted from the LED module 20 (including the light reflected by the reflective film 24) penetrates the illumination light incident member 76 (and the reflective coating) (without being reflected by the incident portion 78). May be emitted to the outside of the collar portion 77 as it is (see arrow B in FIGS. 3 and 4). However, since the light amount adjustment member 84 housed in the receiving recess 80 of the collar portion 77 is made of metal, the illumination light that has passed through the collar portion 77 and directed toward the light amount adjustment member 84 (transmits the light amount adjustment member 84. Not) completely reflected by the light amount adjusting member 84 toward the back surface 51a. Therefore, it is possible to suppress the illumination light that has passed through the illumination light incident member 76 and is emitted to the outside (surface 51b side) of the light distribution means 50 from becoming excessively bright (a hot spot is formed).
On the other hand, the illumination light transmitted (penetrated) through the portion located on the outer peripheral side of the receiving recess 80 of the collar portion 77 is an area located on the outer peripheral side from the light shielding portion 87 of the light amount adjustment sheet 86 (hereinafter referred to as an outer peripheral side region). Head to). Since a large number of light shielding portions 88 are formed in this outer peripheral region, the amount of light emitted from the outer peripheral region to the outside of the light amount adjustment sheet 86 is not so much. However, the outer peripheral side region (light quantity adjustment sheet 86) emits the illumination light to the outside while diffusing it. Therefore, the illumination light emitted to the outside from the outer peripheral side region of the light amount adjustment sheet 86 through the collar portion 77 does not become too dark.

As described above, the light distribution unit 50 of the present embodiment can supply a sufficient and non-excessive amount of illumination light (illumination light with less luminance unevenness) from the entire light distribution unit 50 to the liquid crystal panel 11. An appropriate amount of illumination light can be supplied.

Further, since the light distribution plate 51 is a flat lens, the moldability and workability are good, and it is possible to reduce the material required to manufacture one light distribution plate 51. That is, the light distribution plate 51 can be manufactured at a low cost.
Furthermore, since the thickness of the light distribution plate 51 can be reduced, it is possible to suppress the entire thickness of the liquid crystal display device 10 and the light distribution means 50 from being increased.

Further, the heat generated in each LED 23 is transmitted to the heat sink 28 through the thin reflective film 24 and the LED holder 21 to be radiated from the heat sink 28, and is also transmitted from the heat sink 28 to the chassis 12 to be radiated from the chassis 12. Therefore, the heat of the LED 23 can be efficiently radiated to the outside of the liquid crystal display device 10 (light distribution means 50). Therefore, it is possible to prevent a decrease in the light emission efficiency of the LED 23 due to a high temperature.

As mentioned above, although this invention was demonstrated based on said each embodiment, this invention is not limited to the said embodiment, It can implement, giving various deformation | transformation.
For example, the diffusion inhibiting portions 55a and 55b may be formed on the back surface 51a side or may be formed on the light distribution plate 51 as through holes.
You may change the number and shape of a diffusion inhibition part, and / or the position of the diffusion inhibition part in the light distribution plate 51. FIG. For example, the shape of the diffusion inhibiting part may be a straight line, or the diffusion inhibiting part may be only one located on a straight line connecting one long side 51 </ b> L of the light distribution plate 51 and the fitting hole 54.

At least a part of the illumination light incident member 76 (for example, a part corresponding to the incident part 78) may be made of metal.
At least a part of the illumination light incident member 76 (for example, a part corresponding to the incident part 78) and the light distribution plate 51 may be integrally formed. However, also in this case, it is preferable that the part corresponding to the illumination light incident member 76 has a lower transmittance than the other parts of the light distribution plate 51. In addition, when the illumination light incident member 76 and the light distribution plate 51 are separated or integrated, the tip surface (conical surface) of the incident portion 78 may be provided with a reflective coating (for example, a metal film). In addition, the shape of the tip surface of the incident portion 78 may be another shape (for example, a quadrangular pyramid) as long as the incident illumination light can be reflected in the orthogonal direction. Further, the conical concave portion 73 is formed on the surface 51b side after the front end surface of the incident portion 78 is positioned on the front surface 51b side of the light distribution plate 51, so that the front end surface of the incident portion 78 is formed on the inner side of the light distribution plate 51. The reflected light may be emitted from the back surface 51 a side to the outside of the light distribution plate 51.
Even if the conical concave portion 73 is changed to another shape (for example, a quadrangular pyramid-shaped concave portion) (the illumination light traveling while diffusing inside the light distribution plate 51 can be reflected to one side of the front surface 51b and the rear surface 51a). Good.

The light amount adjusting member 84 may be made of a material other than metal. However, also in this case, at least the surface facing the illumination light incident member 76 needs to have a light transmittance lower than that of the illumination light incident member 76 (for example, almost the entire light amount adjusting member 84 can transmit light). ) After being composed of a transmissive material, the surface of the light amount adjusting member 84 facing the illumination light incident member 76 is composed of a reflective coating made of a material (for example, metal) whose transmittance is lower than that of the illumination light incident member 76. .
Further, by forming one or a plurality of through holes through the light amount adjusting member 84 in the thickness direction of the light distribution plate 51, the amount of illumination light transmitted through the light amount adjusting member 84 can be increased ( You may adjust).
The light amount adjustment sheet 86 may be omitted.

Located between three screws (female screw hole 70) other than the screw (female screw hole 70) adjacent to the triangular region and the short side 51S and / or the long side 51L located in the vicinity of these screws. You may provide the conical recessed part 73 in an area | region with high density.

Reflective materials (for example, coating and taping) are provided on the side surfaces (outer peripheral surfaces) of the short side 51S and the long side 51L of the light distribution plate 51, or concave portions having a shape similar to the conical concave portion 73 are formed in these portions. Also good. If it does in this way, the illumination light which is going to leak outside from the side (outer peripheral surface) of the short side 51S or the long side 51L through the inside of the light distribution plate 51 is reflected inside the light distribution plate 51 by the reflecting material, The concave portion can be reflected on the inner side of the light distribution plate 51. Therefore, since leakage of illumination light from the side surfaces (outer peripheral surfaces) of the short side 51S and the long side 51L can be reduced, the amount of illumination light emitted from the light distribution means 50 to the outside can be increased.
The front shape of the light distribution plate 51 may be a shape other than a rectangle. Moreover, you may utilize the lighting fixture 15 (light distribution board 51) for the thing different from the light source (backlight) for the liquid crystal panel 11, for example, a normal lighting fixture.
Moreover, you may use things other than LED module 20 (LED23) (for example, organic electroluminescence (organic EL), a fluorescent lamp, etc.) as a light source of the lighting fixture 15. FIG.

FIG. 27 shows another embodiment of the engaging portion retracting portion of the heat sink (base member) 28. In this other embodiment, the support protrusion (engagement portion, engagement pin) 58 of the light distribution plate (light distribution member) 51 is connected to the mounting through-hole 27 ′ of the LED holder (resin molding portion) 21 and the conduction. The plate is engaged with the engagement hole 29D or the engagement hole 29E of the plate (conduction member) 29, and further retreats (retreats) into the retreat recess (engagement portion retreat portion) 28D of the heat sink (base member) 28.

FIG. 28 shows still another embodiment of the engaging portion retracting portion of the heat sink (base member) 28. In yet another embodiment, the support protrusions (engagement portions, engagement pins) 58 of the light distribution plate (light distribution member) 51 are attached to the mounting through-holes 27 ′ of the LED holder (resin molding portion) 21, and It is engaged with the engagement hole 29D or the engagement hole 29E of the conduction plate (conduction member) 29, and further retreats (retreats) to the retreat through hole (engagement portion retraction portion) 28E of the heat sink (base member) 28.

FIG. 29 shows still another embodiment of the engaging portion retracting portion of the heat sink (base member) 28. In still another embodiment, the support protrusion (engagement portion, engagement pin) 58 of the light distribution plate (light distribution member) 51 is provided with the mounting recess 27 of the LED holder (resin molding portion) 21 and the conduction plate. It is engaged with the engagement hole 29D or the engagement hole 29E of the (conduction member) 29, and is further opposed to the engagement portion facing portion (engagement portion retracting portion) 28F of the heat sink (base member) 28. The engaging portion opposing portion 28F enters the inside of the mounting recess 27 of the LED holder (resin molding portion) 21 and serves as a double bottom portion superimposed on the bottom of the mounting recess 27. (Member) 51 is opposed to the support protrusion (engagement portion, engagement pin) 58 of the member.

FIG. 30 shows still another embodiment of the engaging portion retracting portion of the heat sink (base member) 28. 29, in the configuration of FIG. 29, an upper rising wall 28F1 is formed at the end of the engaging portion facing portion 28F superimposed on the bottom of the mounting recess 27, and the upper rising wall 28F1 is It is recessed into the side wall of the mounting recess 27.

29 and 30, the heat sink (base member) 28 constitutes a part of the mounting concave portion 27 of the LED holder (resin molding portion) 21. 29 and 30, a mounting through hole 27 ′ may be provided instead of the mounting recess 27 of the LED holder (resin molding portion) 21. In this case, the heat sink (base member) 28 has an engaging portion facing portion 28F for making the mounting through-hole 27 ′ a bottom, and is formed at an end portion of the engaging portion facing portion 28F. The upper rising wall 28 </ b> F <b> 1 can constitute a part of the mounting through hole 27 ′ of the LED holder (resin molding portion) 21.

The light distribution plate and lighting fixture of the present invention are suitable for use in a light distribution plate and lighting fixture using a semiconductor light emitting element (LED) or the like.

10 Liquid crystal display device 11 Liquid crystal panel 12 Chassis (chassis member)
12a Cable through hole 15 Lighting equipment (semiconductor light-emitting element module)
20 LED module 21 LED holder (resin molding part)
22 circular recess 23 LED (semiconductor light emitting element, light source)
24 Reflective film 25 26 Connector connection groove (connector housing)
25a 26a Anode 25b 26b Cathode 27 Mounting recess (Light distribution member mounting recess)
27 'mounting through hole (through hole for light distribution member mounting)
28 Heat sink (base member)
28A Mounting surface 28B 28C Retraction cutout portion (engagement portion retraction portion)
28D Recessed recess (engagement part retracting part)
28E Retraction through hole (engagement part retraction part)
28F Engagement part facing part (engagement part retracting part)
28F1 Upper rising wall 29 Conducting plate (conducting member)
29A Circular hole 29B First conductive part 29C Second conductive part 29D 29E Engagement hole 32 Cable with connector 33 Cable 34 Electric wire 35 Cover 36 Connector 37 Insulator 37a Fitting protrusion 38 First contact 39 Second contact 42 Relay connector 43 Insulator 44 Fixing hole 45 Connection hole 50 Light distribution means 51 Light distribution plate (light distribution member)
51a Back surface 51b Front surface 51c Distance gradually changing portion 51L Long side 51S Short side 52 Central plane portion 53 Outer peripheral side facing portion 54 Fitting hole 55a 55b Diffusion inhibition portion 56 Recess for mounting leg 57 LED module support portion 58 Support protrusion (engagement portion) , Engaging pin)
59 Positioning pin 60 Clogging-like support portion 61 Tip contact surface 64 First inclined portion 66 67 Outer peripheral side plane 69 Second inclined portion 70 Female screw hole 71 Cylindrical protrusion 73 Conical recess 76 Illumination light incident member 77 Gutter portion 78 Incident portion 80 Receiving recess 81 Female screw hole 82 Mounting leg 84 Light quantity adjusting member 85 Center through hole 86 Light quantity adjusting sheet 87 88 Light shielding part 89 Center through hole 90 Screw 91 Male screw part 92 Head 93 Illumination light control unit

Claims (21)

1. A flat light distribution plate that diffuses illumination light incident on the incident portion from the light source toward the outer peripheral surface side,
   A concave portion formed in at least one of the front surface and the back surface or a through hole penetrating between the front surface and the back surface, and having a plurality of diffusion inhibiting portions located between the incident portion and the outer peripheral surface A light distribution board.
2. The light distribution plate according to claim 1,
   The light distribution plate whose front shape of the said light distribution plate is a rectangle.
3. The light distribution plate according to claim 2,
   A light distribution plate in which the diffusion inhibiting part is provided on at least one straight line connecting at least one of a long side and a short side constituting the rectangular outer shape and the incident part.
4. In the light distribution board of any one of Claim 1 to 3,
   A light distribution plate in which the diffusion-inhibiting part has an arc shape centered on the incident part.
5. In the light distribution board of any one of Claim 1 to 4,
   A light distribution plate in which an interval gradual change portion is formed at a portion located on the outer peripheral surface side of the diffusion inhibiting portion of the light distribution plate so that the interval between the front surface and the back surface is gradually narrowed toward the outer peripheral surface side.
6. The light distribution plate according to any one of claims 1 to 5,
   The light source;
   A lighting apparatus comprising:
7. The lighting fixture according to claim 6,
   The light source is
   A semiconductor light emitting device;
   A base member having an attachment surface to which the semiconductor light emitting element is attached;
   A light distribution member mounting portion that is coupled to the base member and is positioned on the outer peripheral side of the mounting surface and is engaged with an engaging portion of a light distribution member that distributes light emitted from the semiconductor light emitting element. A resin molded part having a recess or a through hole;
   With
   The said base member is a lighting fixture which has an engaging part retraction part which retracts | saves the said engaging part of the said light distribution member engaged with the recessed part or through-hole for the said light distribution member attachment of the said resin molding part.
8. The lighting fixture according to claim 7,
   The engaging portion retracting portion of the base member is a lighting fixture including a retracting cutout portion.
9. The lighting fixture according to claim 8,
   The evacuation cutout portion of the base member has an R shape in which a part of the periphery of the base member is opened.
10. The lighting fixture according to claim 7,
    The engaging portion retracting portion of the base member is a lighting fixture including a retracting recess.
11. The lighting fixture according to claim 7,
    The engaging portion retracting portion of the base member is a lighting fixture including a retracting through hole.
12. The lighting fixture according to claim 7,
    The engagement portion retracting portion of the base member enters an inside of the light distribution member mounting recess or through hole of the resin molding portion and faces the engagement portion of the light distribution member. A lighting fixture having.
13. The luminaire of claim 12,
    The engaging portion facing portion of the base member is a lighting fixture facing the engaging portion of the light distribution member as a double bottom portion superimposed on the light distribution member mounting recess of the resin molding portion.
14. The lighting fixture according to any one of claims 7 to 13,
    The combined body of the base member and the resin molded portion has a substantially rectangular shape when viewed in plan,
    The light distribution member mounting recess or through-hole of the resin molded portion and the engaging portion retracting portion of the base member are provided at positions corresponding to each other in the peripheral portion of the substantially rectangular shape in plan view. .
15. The lighting fixture according to any one of claims 7 to 14,
    The illumination further includes the light distribution member that distributes the light emitted from the semiconductor light emitting element and has the engagement portion engaged with the light distribution member mounting recess or through hole of the resin molding portion. Instruments.
16. The lighting fixture of claim 15,
    The light distribution member is positioned with respect to a combined body of the base member and the resin molding portion by engaging the engagement portion with a recess or a through hole for attaching the light distribution member of the resin molding portion. Lighting equipment.
17. The lighting fixture according to claim 15 or 16,
    The resin molded portion has a connector housing portion that houses a connector that is electrically connected to the semiconductor light emitting element from the outside and has a fixing hole formed therein.
    The said light distribution member is a lighting fixture which has a positioning pin which positions with respect to the said connector by being engaged with the said fixing hole of the said connector accommodated in the said connector accommodating part.
18. The lighting fixture according to any one of claims 15 to 17,
    The said light distribution member is a lighting fixture which has a clog-like support part in which the front end contact surface which contacts the opposing surface of the chassis member laminated | stacked on the said lighting fixture was formed.
19. The lighting fixture according to any one of claims 15 to 18,
    The light distribution member has a cylindrical protrusion formed with a tip contact surface that contacts a facing surface of a chassis member stacked on the lighting fixture, and a female screw is provided on the tip contact surface of the cylindrical protrusion. A through hole for a screw is formed on the opposite surface of the chassis member, and the female screw hole and the screw through hole are aligned with each other from the opposite side of the chassis member. A lighting fixture in which the lighting fixture and the chassis member are fixed in a stacked state by screwing a screw inserted into the screw through-hole into the female screw hole.
20. The luminaire according to any one of claims 15 to 19,
    The resin molding part has at least two connector housing parts for housing at least two connectors that are electrically connected to the semiconductor light emitting element from the outside.
    The at least two connectors housed in the at least two connector housing portions are arranged so that extending directions of at least two cables connected to the at least two connectors are different from each other.
21. The lighting fixture of claim 20,
    The extending direction of the said at least 2 cable is a lighting fixture which is in the positional relationship which does not cross | intersect but is orthogonal.

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