JP2014170654A - Lighting equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide lighting equipment capable of restricting irregular light-dark state etc. as indirect illumination and attaining a reflection light of a light source widening in a wide range.SOLUTION: The present invention relates to lighting equipment 11 having an LED light source part 50 and a shade 31 covering the front surface of the LED light source part 50. The shade 31 comprises: a transparent light guide plate 32; a first reflection part 33 arranged at an opposing position of the LED light source part 50 at a front surface side of the light guide plate 32 to shut off light to prevent incident light incident from the LED light source part 50 through the light guide plate 32 from out-going toward the front surface side of the light guide plate 32 and to reflect the incident light toward the rear surface side of the light guide plate 32; and a second reflection part 34 arranged around an opposing position of the LED light source part 50 at the rear surface side of the light guide plate 32 to shut off light to prevent a part of the out-going light out-gone from the LED light source part 50 from incident into the light guide plate 32 and at the same time to reflect reflection light reflected by the first reflection part 33 toward the front surface side of the light guide plate 32.

Description

  The present invention relates to a lighting apparatus having an indirect lighting function.

  Conventionally, various illumination devices that form planar illumination light using a light guide plate have been proposed. For example, an illumination device is known that includes a light guide plate having a light emitting surface and a reflective surface facing each other and having an incident surface on at least one side end surface thereof, and a light source facing the incident surface of the light guide plate ( For example, see Patent Document 1).

  Patent Document 1 discloses an illumination device in which a plurality of light sources are arranged along each end face of a rectangular light guide plate, and light is incident on the light guide plate from each end face of the light guide plate to emit light on the surface of the light guide plate. ing. This illuminating device has a configuration in which light from a light source is reflected by a light emitting surface and a reflecting surface of a light guide plate, and planar illumination light is emitted to a side visually recognized by a user.

JP 2007-108438 A

  However, in the configuration of the illumination device disclosed in Patent Document 1, it is possible to visually observe the direct light from the light source from the front side of the illumination device. It is difficult to obtain uniform illumination light.

  As a lighting fixture having an indirect illumination function, for example, in order to effectively produce the atmosphere of the space, for example, direct light is not directed to the side visually recognized by the user, and the reflected light of the light source as indirect illumination Only those that can emit light over a wide range are required on the side where the user can visually recognize them.

  Then, this invention is made | formed in view of the said subject, and it aims at providing the lighting fixture which can obtain the reflected light of the light source which suppresses nonuniformity, such as light and dark, as an indirect illumination, and spreads over a wide range. .

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, the lighting fixture disclosed in this application is
In a luminaire comprising a light source and a shade covering the front of the light source,
Said shade is
A light guide plate having translucency;
Provided at a position facing the light source on the front side of the light guide plate, the incident light incident from the light source through the light guide plate is shielded so as not to be emitted to the front side of the light guide plate, and the incident light is A first reflecting part for reflecting the rear surface side of the light guide plate;
Provided around the position where the light source opposes on the rear surface side of the light guide plate, and shields a part of the emitted light emitted from the light source so as not to enter the light guide plate. And a second reflecting portion for reflecting the reflected light reflected to the front side of the light guide plate.

In the lighting fixture disclosed in the present application,
It is preferable that the first reflecting portion overlaps the second reflecting portion when viewed from the front side of the shade.

In the lighting fixture disclosed in the present application,
The light source is preferably an LED.

  According to the present invention, since the direct light of the light source is not emitted to the front side of the shade and only the reflected light of the light source can be emitted over a wide range, light such as light and darkness is suppressed as indirect illumination and the light spreads over a wide range. Can be provided.

The perspective view which looked at the lighting fixture 11 which concerns on one Embodiment of this invention from diagonally upward. The top view which looked at the lighting fixture 11 from upper direction. Sectional drawing which cut | disconnected the lighting fixture 11 in the position of the AA line of FIG. The expanded sectional view which expanded a part of FIG. Sectional drawing which cut | disconnected the lighting fixture 11 in the position of the BB line of FIG. The front view which shows the front side of the lighting fixture 11. FIG. The CC arrow directional view of FIG. The figure which shows the pattern layered part 41. FIG. The figure which shows the pattern layered part. FIG. 3 is an enlarged cross-sectional view showing a prism body 81.

  Next, the lighting fixture 11 which concerns on embodiment of this invention is demonstrated using FIGS. 1-10. The lighting fixture 11 according to the present embodiment can be used as a bracket light installed on a wall surface, for example. In the following description, the “front side” of the luminaire 11 will be described as the side that emits light, and the “rear side” will be described as the opposite side of the front side. Further, the vertical direction in FIG. 3 will be described as the “vertical direction” of the lighting fixture 11, and the direction orthogonal to the “vertical direction” will be described as the “width direction” of the lighting fixture 11.

  The lighting fixture 11 mainly has the fixture main body 21, the shade 31, the LED light source part 50, and the fixture attachment member 61, as shown in FIGS.

  The fixture main body 21 forms the main body of the lighting fixture 11, and has a fixture main body 22 and a housing portion 23. As shown in FIG. 5, the instrument main body 22 has a pair of substantially U-shaped sheet metal members facing each other and holds the shade 31. The instrument main body 22 is formed using a metal member such as aluminum having thermal conductivity. The instrument main body 22 includes a pair of substrate portions 24, a pair of side plate portions 25 extending at right angles to the substrate portion 24 from the outer ends in the opposing direction of the pair of substrate portions 24 (width direction of the lighting fixture 11), It has a pair of 1st attaching parts 26 extended from the rear end edge of a pair of side board part 25 in the opposing direction (width direction of the lighting fixture 11) inner front diagonal direction of the side board part 25, respectively. A pair of board | substrate part 24 is attached to the width direction outer edge vicinity (near the width direction outer edge shown in FIG. 5) of the shade 31 with the attachment bolt 28. As shown in FIG. The 1st attaching part 26 is for attaching the 2nd attaching part 27 which the accommodating part 23 has with the attaching screw 29, and has an attachment hole which is not shown in figure. The instrument main body 22 is not limited to a metal member or aluminum as long as it is a material having thermal conductivity. Moreover, although the instrument main body 22 is preferably formed of a material having thermal conductivity, it is not essential to have thermal conductivity.

  The accommodating part 23 is a box-shaped member having an open rear surface. The accommodating portion 23 accommodates the rear end portion of the LED light source portion 50, the power supply device 71, the instrument attaching member 61, and the like, and is attached to the instrument main body 22. The front side of the bottom 23a (see FIG. 3) of the housing part 23 is configured as a reflective surface that reflects the light emitted from the LED light source part 50 and the light reflected by the rear face of the second reflecting part 34. The accommodating part 23 is formed using metal members, such as aluminum which has heat conductivity. The accommodating portion 23 has a height and width for accommodating the rear end portion of the LED light source portion 50, the power supply device 71, the appliance mounting member 61, and the like. The housing portion 23 extends from the rear end edge of the housing portion 23 at both ends in the width direction of the housing portion 23 (in FIG. 5, the rear end edge at both ends in the width direction of the housing portion 23) in the front diagonal direction in the width direction of the housing portion 23. A pair of extended second mounting portions 27 are formed. The second attachment portion 27 is for attaching to the first attachment portion 26 of the instrument main body 22 with an attachment screw 29, and has an attachment hole (not shown). The housing part 23 is a state in which the rear end part of the LED light source part 50, the power supply device 71, the instrument mounting member 61, and the like are accommodated and disposed therein, and the pair of instrument main bodies 22 disposed to face the rear surface of the shade 31. The pair of first mounting portions 26 and the pair of second mounting portions 27 are overlapped with each other and fixed using mounting screws 29. The housing part 23 is fixed to the instrument main body 22 so that the light from the LED light source part 50 is directly applied to both ends (upper and lower ends in the present embodiment) of the instrument main body 21 as shown in FIG. A pair of open portions 19 that can be emitted to the outside of the luminaire 11 is formed. The opening part 19 is an opening for distributing the direct light emitted from the LED light source part 50 to, for example, a wall surface or a ceiling surface where the lighting fixture 11 is installed. The accommodating part 23 is not limited to a metal member or aluminum as long as it is a material having thermal conductivity. Moreover, although it is preferable that the accommodating part 23 is formed with the material which has heat conductivity, it is not essential that it has heat conductivity.

  The shade 31 has a substantially plate shape that covers the front surface of the LED light source unit 50, and is formed in a substantially square shape in plan view. The front side of the shade 31 is formed to be substantially flat (see FIG. 6). The shade 31 is attached at a position facing the front surface of the LED light source unit 50 disposed in the instrument main body 21. The front side of the shade 31 is, for example, a side that is visible to the user in a state in which the lighting fixture 11 is installed on a wall surface, and is a side that constitutes a part of the design surface of the lighting fixture 11. The shade 31 mainly has a light guide plate 32, a first reflecting portion 33, and a second reflecting portion 34. Although details will be described later, the shade 31 reflects the direct light that has entered the light guide plate 32 from the LED light source unit 50 between the front surface and the rear surface of the light guide plate 32 (in this embodiment, outside the shade 31). The light is guided in the vertical direction and the vertical diagonal direction of the first reflecting unit 33, and the reflected light (indirect light) of the LED light source unit 50 is irradiated from the front surface of the shade 31.

The light guide plate 32 is composed of two plate-like members having a rectangular shape in plan view and formed of a transparent acrylic resin material having translucency. The light guide plate 32 becomes substantially square by abutting one side of the two plate-like members. In the light guide plate 32, the front surface excluding the portion covered by the first reflecting portion 33 is a light emitting surface that emits light (a surface where light is visually recognized by the user), and the rear surface is a reflective surface that reflects light. The light emitting surface is a portion that is emitted as reflected light after the direct light emitted from the LED light source unit 50 is reflected inside the shade 31. The light guide plate 32 reflects light emitted from the LED light source unit 50 on the front and rear surfaces of the light guide plate 32 facing each other while being reflected in a predetermined direction (in this embodiment, the first reflection unit 33 in the vertical direction and the vertical slant). Direction). The light guide plate 32 has an attachment hole 35 for fixing the instrument main body 21 (apparatus main body 22) with the attachment bolt 28 in the vicinity of the outer edge in the width direction of the light guide plate 32 (in the vicinity of the outer edge in the width direction shown in FIG. 5). . As will be described in detail later, the light guide plate 32 has a light transmitting portion 20 that transmits light emitted from the LED light source portion 50 into the light guide plate 32.
In this embodiment, the light guide plate 32 is constituted by the two plate members having translucency. However, the light guide plate 32 is not particularly limited, and the light guide plate 32 is guided by a single plate member having translucency. The optical plate 32 may be configured. Moreover, although the light guide plate 32 is substantially square, it may have another shape.

The first reflecting portion 33 is provided on the front surface of the light guide plate 32 at a position overlapping the LED light source portion 50. The first reflecting portion 33 is provided at a position facing the LED light source portion 50 on the front side of the light guide plate 32. The first reflection unit 33 shields incident light incident from the LED light source unit 50 via the light guide plate 32 so as not to be emitted to the front side of the light guide plate 32 and reflects the incident light to the rear surface side of the light guide plate 32. It is a part to be made. Specifically, as shown in FIG. 6, the first reflecting portion 33 is a sheet metal member having a rectangular shape in front view. The first reflecting portion 33 includes a flat front plate portion 36 whose front side is the side visually recognized by the user, and extends at right angles to the front plate portion 36 from the longitudinal ends of the front plate portion 36 toward the rear. A pair of flat plate-like side plate portions 37 and a pair of side plate portions 37 that extend from the rear end edges of the pair of side plate portions 37 toward the inner side in the longitudinal direction of the first reflecting portion 33 at right angles to the side plate portions 37. And a light guide plate holding portion 38. As shown in FIG. 7, the first reflecting portion 33 holds the light guide plate holding portion 38 and the long plate-like attachment member 39 in a state where the light guide plate 32 is held by the light guide plate holding portion 38 included in the first reflecting portion 33. It attaches with the attachment bolt 40 via. The front plate portion 36 and the side plate portion 37 of the first reflecting portion 33 have a light shielding property that does not transmit the emitted light emitted from the LED light source portion 50 to the outside of the first reflecting portion 33, and the rear surface side of the front plate portion 36. (The back side), the back side of the side plate part 37, and the front side (back side) side of the light guide plate holding part 38 are reflective layered parts that reflect outgoing light emitted from the LED light source part 50 (in this embodiment, white). A layered portion formed by painting).
In the present embodiment, a sheet metal member is used as the first reflecting portion 33, but the first reflecting portion 33 is not particularly limited. For example, using the light guide plate 32 made of a single plate-like member having translucency, a layered material having the same light shielding and reflective functions as the first reflecting portion 33 is provided on the front side of the light guide plate 32. It does not matter if it is provided. Examples of such a layered material include a printed layer formed by printing such as silk printing, a coating layer by a coating film, a sheet-like member that can be attached, and the like.

  The second reflecting portion 34 is provided at least at a part of the rear surface of the light guide plate 32 other than the position overlapping the first reflecting portion 33. The second reflecting part 34 is provided around the position where the LED light source part 50 faces on the rear surface side of the light guide plate 32, so that a part of the emitted light emitted from the LED light source part 50 does not enter the light guide plate 32. This is a portion that shields the reflected light reflected by the first reflecting portion 33 toward the front side of the light guide plate 32. Specifically, the second reflecting portion 34 is a pair of layered portions having a substantially rectangular shape formed on the rear surface side of the light guide plate 32, and is opposed to the pair of second reflecting portions 34 (lighting fixtures). 11 is a sheet metal member formed such that the outer edge except the inner side 34 a side coincides with the outer edge of the light guide plate 32. On the rear surface side of the shade 31, as shown in FIG. 7, a pair of sides 34 a of the second reflection portion 34 and a light guide plate of the pair of first reflection portions 33 are arranged in the vertical center portion on the rear surface side of the shade 31. By being surrounded by the width direction outer edge portion of the holding portion 38 and the opposite end portions of the pair of attachment members 39, a substantially rectangular shape that becomes an area where the emitted light from the LED light source portion 50 enters the light guide plate 32. A translucent part 20 is formed.

The translucent unit 20 is provided at a position facing the LED light source unit 50, and can transmit direct light emitted from the LED light source unit 50. The second reflecting portion 34 has a light shielding property that does not transmit the emitted light emitted from the LED light source portion 50 into the light guide plate 32 around the position where the LED light source portion 50 faces, and the rear surface of the second reflecting portion 34. The side has reflectivity for reflecting the emitted light emitted from the LED light source unit 50. Further, the front surface side of the second reflecting portion 34 has reflectivity for reflecting the reflected light reflected in the light guide plate 32. Further, each of the pair of light guide plate holding portions 38 and the pair of attachment members 39 has the same light shielding and reflective functions as the second reflection portion 34.
In the present embodiment, a sheet metal member is used as the second reflecting portion 34, but it is not particularly limited. For example, a layered part formed by silk printing or a sheet-like member that can be pasted, having the same light-shielding and reflective functions as the second reflecting part 34 on the rear surface side of the light guide plate 32 as the second reflecting part 34 It is possible to provide a configuration in which an alternative is provided.

The first reflecting portion 33 is configured so that at least a portion thereof overlaps with the second reflecting portion 34 when viewed from the front side of the shade 31. Specifically, the overlapping portion of the first reflecting portion 33 and the second reflecting portion 34 indicated by reference sign D in FIG. 4 is the second reflecting portion shown in FIG. It is comprised so that it may arrange | position at the up-down direction outer side of the light-guide plate 32 rather than a pair of edge | side 34a of 34. FIG. Thereby, even if direct light is emitted from the LED light source unit 50, the user facing the lighting fixture 11 cannot see the light source from the front side of the shade 31, so that unevenness such as light and darkness as indirect illumination can be suppressed. it can.
In addition, the overlapping part D of the 1st reflection part 33 and the 2nd reflection part 34 is not specifically limited to this embodiment. In consideration of the relationship between the luminaire 11 and the user, it may be set as appropriate so that the user does not see light directly in a natural usage situation by the user. When such a situation is assumed, for example, the overlapping portion D is preferably equal to the thickness of the light guide plate 32.

On the front surface of the light guide plate 32, pattern layered portions 41 and 42 made of layered portions having a predetermined pattern shape as shown in FIGS. 8 and 9 are formed in a region excluding the portion covered with the first reflecting portion 33. Also good. The pattern layer portions 41 and 42 can be formed of a white (semi-translucent) silk print layer. The pattern layer portions 41 and 42 are reflective, and reflect the light incident on the front surface side of the light guide plate 32 toward the rear surface side of the opposing light guide plate 32.
The pattern layered portion 41 is formed in a horizontal stripe shape parallel to the longitudinal direction of the first reflecting portion 33 (front plate portion 36) on the front surface side of the light guide plate 32, and the first reflecting portion 33 (front plate portion). The width of the stripe is gradually reduced as the distance from 36) increases to the outside in the vertical direction of the light guide plate 32. Thus, the amount of light transmitted from the light guide plate 32 to the front side of the light guide plate 32 is controlled, and on the front surface (light emitting surface) of the light guide plate 32, the light guide plate 32 is moved outwardly in the vertical direction (in FIG. 8 with arrows). Light can be guided so as to spread over a wide range (outside in the vertical direction shown).
On the other hand, the pattern layered portion 42 is formed in the form of dots arranged in the vertical direction and the direction along the width direction with respect to the first reflecting portion 33 (front plate portion 36) on the front surface side of the light guide plate 32, In the vicinity of the central portion across the first reflecting portion 33 (front plate portion 36), a large-diameter dot is disposed, and as the distance from the vicinity of the central portion increases to the outer side in the vertical direction and the outer side in the width direction of the light guide plate 32, The dots are gradually reduced in diameter. That is, in the pattern layered portion 42, relatively large dots are arranged in a region near the LED light source unit 50, and the size of the dots is reduced as the distance from the LED light source unit 50 increases. Thus, the amount of light transmitted from the light guide plate 32 to the front side of the light guide plate 32 is controlled, and the first reflection portion 33 (front plate portion 36) is sandwiched on the front surface (light emitting surface) of the light guide plate 32. In the vicinity of the central portion, the amount of reflected light on the front surface (light emitting surface) of the light guide plate 32 can be improved, and the amount of reflected light can be gradually reduced as the distance from the vicinity of the central portion increases. The light can be guided so as to spread over a wide range on the outer side in the vertical direction and the outer side in the width direction of the light guide plate 32 (outer side in the vertical direction and outer side in the width direction indicated by arrows in FIG. 9).
That is, by forming the pattern layered portions 41 and 42 on the light guide plate 32, the amount of light transmitted from the light guide plate 32 to the front side of the light guide plate 32 is changed. Compared with the case where the pattern layered portions 41 and 42 are not formed on the light guide plate 32, the indirect illumination suppresses unevenness such as brightness and darkness and spreads light over a wide range as the indirect illumination (light emission). Surface).
The pattern shape of the pattern layered portion is not particularly limited to the pattern layered portions 41 and 42, and a pattern shape having the same effect as the pattern layered portions 41 and 42 may be appropriately selected.

The LED light source unit 50 is disposed at a position facing the rear surface of the shade 31. The LED light source unit 50 is disposed so that its front end protrudes forward from an opening (not shown) opened in the center of the front surface of the housing 23, and its rear end is inside the housing 23. Fixed. The LED light source unit 50 includes an LED module 50a that is a light source, and a light source cover 51 having a substantially hemispherical shape and covering the front of the LED module 50a. The LED module 50a is electrically connected to the power supply device 71 via an electric wire (not shown).
In the present embodiment, an LED is used as the light source. However, the type of the light source is not limited to the LED, and for example, an organic EL element (OLED) can be realized.
In addition, as shown in FIG. 10, it is good also as a structure which provides the prism body 81 whose cross-sectional shape is a triangle between the LED light source part 50 and the translucent part 20. FIG. By providing the prism body 81, the light emitted from the LED light source unit 50 can be refracted by the prism body 81, and the amount of light emitted from the pair of open portions 19 of the lighting fixture 11 can be increased.

  The power supply device 71 is a device for supplying power to the LED module 50 a of the LED light source unit 50 to light it. The power supply device 71 is accommodated in the accommodating portion 23 and is fixed to the accommodating portion 23 with a mounting screw. The power supply device 71 is provided with a connector (not shown). When the lighting fixture 11 is attached to the wall surface, it is connected to a mating connector (not shown) on the wall surface side so that the ceiling wiring fixture for the lighting fixture can be connected. Through an external power source. The power supply device 71 and the LED module 50a are electrically connected by an electric wire (not shown).

  The instrument mounting member 61 is a sheet metal member having a substantially U-shaped cross-section, and is used for mounting the instrument body 21 on an installation surface such as a wall surface using a mounting tool (not shown). As shown in FIG. 3, both the upper and lower ends of the instrument mounting member 61 are fixed by the mounting screws 43 in the state in which the instrument mounting member 61 is accommodated in the accommodating portion 23.

  When the LED light source unit 50 of the lighting fixture 11 configured as described above is turned on, the light emitted from the LED light source unit 50 is obtained when the shade 31 includes the first reflection unit 33 and the second reflection unit 34. 3, the light enters the light guide plate 32 from the light transmitting portion 20 of the light guide plate 32, as indicated by a dotted arrow. In addition, the light incident on the light guide plate 32 is first reflected on the rear surface side of the first reflecting portion 33. Further, the light reflected on the rear surface side of the first reflecting portion 33 is reflected on the front surface side of the second reflecting portion 34 facing the first reflecting portion 33. The reflected light reflected by the front surface side of the second reflecting portion 34 is partially shaded 31 on the front surface (light emitting surface) of the light guide plate 32 positioned on the outer side in the vertical direction of the first reflecting portion 33. And the remaining part of the light is reflected and travels again toward the front surface side of the second reflecting portion 34. That is, in the light guide plate 32, the shade 31 transmits the direct light incident from the light transmitting portion 20 of the light guide plate 32 to the rear surface side of the first reflecting portion 33 and the front surface (light emitting surface) side of the light guide plate 32, and the second. While repeating reflection alternately with the front surface side of the reflecting portion 34, the reflected light is guided in a direction away from the LED light source portion 50, and a part of the reflected light is transmitted from the front surface (light emitting surface) of the light guide plate 32. By transmitting (emitting) the light to the front side, the front surface (light emitting surface) of the light guide plate 32 can emit light. In addition, when the pattern layered portions 41 and 42 are provided on the front surface of the light guide plate 32 as described above, a part of the reflected light in the light guide plate 32 is guided by the rear surface side of the pattern layered portions 41 and 42. In addition to being reflected in the pattern 32, the light is emitted to the front side of the light guide plate 32 from between the horizontal stripe-shaped pattern layer portions 41 and between the dot-shaped pattern layer portions 42. Thus, since the direct light emitted from the LED light source unit 50 is reflected in the shade 31, the light that spreads softly and widely from the front surface of the shade 31 as the indirect illumination is provided to the side visually recognized by the user.

  That is, according to the lighting fixture 11 of the present embodiment, when the LED light source unit 50 emits light, the front side facing the LED light source unit 50 is shielded by the light shielding property of the first reflecting unit 33. When light enters the translucent part 20 provided in a band shape in the center in the vertical direction from the LED light source part 50 to the rear side of the shade 31, and subsequently reflected by the rear face (reflecting surface) of the first reflecting part 33, Light is reflected by the front surface (reflecting surface) of the second reflecting portion 34 and travels outward in the extending direction of the shade 31 (vertical direction of the lighting fixture 11) while repeating the reflection in a zigzag shape (dotted arrow shown in FIG. 3) reference). On the other hand, a part of the emitted light from the LED light source unit 50 is incident on the light guide plate 32 through the light transmitting part 20, and a part of the emitted light from the LED light source part 50 is on the periphery of the light transmitting part 20. Light is shielded by the second reflecting portion. As a result, the light reflected on the rear surface (reflecting surface) of the first reflecting portion 33 and the rear surface (reflecting surface) in the light guide plate 32 is diffused into the light guide plate 32 and the front surface of the light guide plate 32 emits light as indirect light. On the other hand, in the up-and-down direction of the lighting fixture 11 (the direction of the white arrow in FIG. 2), the light is directly emitted to the outside.

  Furthermore, when the lighting fixture 11 is attached to the wall surface as a bracket light, as described above, the shade 31 efficiently emits light on the front surface side of the light guide plate 32 as indirect lighting, and through the opening 19 included in the lighting fixture 11. The light emitted from the LED light source unit 50 can be distributed to the wall surface. Thereby, in addition to the effect as indirect illumination of the wall surface, direct light emitted from the LED light source unit 50 by the shade 31 is converted into indirect light and emitted from the front surface of the shade 31, so that the shade 31 has a wider light emitting area. The front surface side of the light guide plate 32 can emit light to brighten the entire space as indirect illumination.

  As a modification of the luminaire 11 of the present embodiment, for example, a front surface of a predetermined shape having translucency or semi-translucency at a position facing the LED light source unit 50 in the front plate portion 36 of the first reflection unit 33. A light part may be provided, and direct light emitted from the LED light source part 50 via the front light transmitting part may be emitted to the front side of the shade 31. The lighting fixture configured as described above has a direct illumination function that can ensure direct illuminance by the front translucent part when installed on the ceiling, and an indirect illumination function as described above. It can be provided as a ceiling light that simultaneously realizes both space lighting and ceiling lighting as indirect lighting.

  In addition, the shape of the shade 31 of this embodiment is an example, and is not limited to the shape of this embodiment. For example, when the outer shape of the shade 31 is a square shape other than the square shape, a round shape, or other shapes, the shape can be set accordingly. Further, it can be appropriately deformed according to the shape of the LED light source unit 50.

  In general indirect illumination, a method of emitting light from a space between a light shielding object (such as a sheet metal) and a light shielding object is often used. In such indirect illumination, light does not spread so much and partly shines. On the other hand, in the lighting fixture 11 of the present embodiment, the direct light emitted from the LED light source unit 50 is reflected by the light guide plate 32, the first reflection unit 33, and the second reflection unit 34 provided on the shade 31. Light) and output to the front side of the shade 31. Thereby, a smooth light of indirect light can be spread over a wide area in front of the shade 31 without directly seeing the light source from the user.

  According to the present embodiment, the light path length can be increased by reflecting light from the LED light source unit 50 a plurality of times by the shade 31 (in the light guide plate 32). Can be spread. Therefore, smooth light with less unevenness such as light and dark can be irradiated. In particular, the effect is exhibited in a lighting fixture including a light source that emits light having high directivity, such as an LED.

  Moreover, according to this embodiment, since the 2nd reflection part 34 and the attachment member 39 are arrange | positioned in the position facing the front side of the power supply device 71, the power supply device 71 is visually observed from the front side of a lighting fixture. I can't. Therefore, the LED light source unit 50 and the power supply device 71 can be arranged side by side in the vertical direction or the width direction, and the thickness of the entire lighting fixture can be reduced.

  Moreover, according to this embodiment, since the LED light source part 50 is not visible from the front side of the shade 31 (direct light from the LED light source part 50 does not come out from the front side of the shade 31), light irradiation with less unevenness such as brightness and darkness is applied. Is possible. Therefore, it has straightness like an LED light source and looks smooth even when the luminance is high.

  In addition, in the relationship between the 1st reflection part 33, the 2nd reflection part 34, and the translucent part 20, the area ratio, the shape, the number, and a positional relationship can be set arbitrarily.

The lighting fixture 11 is applicable not only to a bracket light but also to a pendant light, a direct-mounted ceiling light, etc. as in the present embodiment.
In the present embodiment, as shown in FIG. 6, both ends in the longitudinal direction of the side plate portion 37 slightly protrude from the end portions of the light guide plate 32, but both ends in the longitudinal direction of the side plate portion 37 and the ends of the light guide plate 32. The parts may be arranged on the same plane. In that case, it is realizable by setting it as the structure which provides a hollow in the position facing the side plate part 37 in the light-guide plate 32, and embeds the side plate part 37 in the hollow, for example.

  Moreover, according to this embodiment, the light emission amount of the light emitted from the shade 31 (light guide plate 32) can be changed by changing the shape of the pattern layer portion according to the site of the light emitting surface of the shade 31 (light guide plate 32). Can be controlled. Specifically, the amount of light emitted can be controlled by appropriately changing the size of each horizontal stripe in the pattern layered portion 41 and the size of the dots in the pattern layered portion 42.

  According to the luminaire 11 according to the present embodiment described above, the direct light of the light source is not emitted to the front side of the shade, and only the reflected light of the light source can be emitted over a wide range. In addition, it is possible to provide light that spreads over a wide area.

DESCRIPTION OF SYMBOLS 11 Illuminating device 23 Accommodating part 32 Light guide plate 33 1st reflection part 34 2nd reflection part 36 Front plate part 37 Side plate part 38 Light guide plate holding part 41 Pattern layer part 42 Pattern layer part 50 LED light source part 51 Light source cover 71 Power supply device 81 Prism body

Claims (4)

In a luminaire comprising a light source and a shade covering the front of the light source,
The light source is disposed at a position facing the rear surface of the shade;
Said shade is
A light guide plate having translucency;
A first reflecting portion provided at a position overlapping the light source on the front surface of the light guide plate;
A lighting fixture comprising: a second reflecting portion provided at least at a part of the rear surface of the light guide plate other than the position overlapping the first reflecting portion. In a luminaire comprising a light source and a shade covering the front of the light source,
Said shade is
A light guide plate having translucency;
Provided at a position facing the light source on the front side of the light guide plate, the incident light incident from the light source through the light guide plate is shielded so as not to be emitted to the front side of the light guide plate, and the incident light is A first reflecting part for reflecting the rear surface side of the light guide plate;
Provided around the position where the light source opposes on the rear surface side of the light guide plate, and shields a part of the emitted light emitted from the light source so as not to enter the light guide plate. A lighting fixture, comprising: a second reflecting portion that reflects the reflected light reflected to the front surface side of the light guide plate.   3. The lighting apparatus according to claim 1, wherein at least a part of the first reflecting portion overlaps the second reflecting portion when viewed from the front side of the shade. The lighting apparatus according to claim 1, wherein the light source is an LED.

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