JP2021064480A - Lighting apparatus - Google Patents

Abstract

To efficiently illuminate a wide irradiation range by suppressing loss.SOLUTION: A lighting apparatus (100) includes a housing (110) and a light source part (120). The light source part (120) is disposed within the housing (110). The housing (110) has a translucent part (110t) which allows transmission of light emitted from the light source part (120). The light source part (120) is arranged obliquely relative to the translucent part (110t).SELECTED DRAWING: Figure 1

Description

The present invention relates to a luminaire.

The lighting device is used not only for irradiating a person with light, but also for irradiating light with a wall or the like as an irradiation target such as so-called indirect lighting. A lighting device that irradiates a wall surface as an irradiation target is also called a wall washer. In the wall washer type lighting device, the light emitted from the light source may be diffused through the reflecting member to irradiate the wall surface (see Patent Document 1). In the lighting device of Patent Document 1, the wall surface is irradiated over a wide range by reflecting the light emitted from the light source at different angles by the reflecting member.

JP-A-2018-129199

However, although the lighting device of Patent Document 1 can irradiate a wide range of light, in order to irradiate the wall surface with desired light, it is necessary to design a complicated reflecting surface shape of the reflector while considering the positions of the LED and the reflector. Was necessary, and it was difficult to manufacture. Further, in the lighting device of Patent Document 1, light loss occurs when the light from the light source is reflected by the reflector, and the light cannot be efficiently irradiated to a specific irradiation range.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a luminaire capable of suppressing light loss and efficiently irradiating light over a wide irradiation range.

The luminaire according to the present invention includes a housing and a light source unit arranged inside the housing. The housing has a translucent portion that transmits light emitted from the light source portion. The light source unit is arranged so as to face obliquely with respect to the translucent unit.

In certain embodiments, the housing has a shielding portion that shields light emitted from the light source portion. The translucent portion has a translucent surface that transmits light emitted from the light source portion. The light source portion is arranged at a position overlapping the shielding portion of the housing in the normal direction of the translucent surface.

In certain embodiments, the light source unit is arranged adjacent to a projection region on which the translucent unit is projected along the normal direction.

In certain embodiments, the light source unit is arranged adjacent to a portion of a projection region on which the translucent unit is projected along the normal direction.

In certain embodiments, the translucent portion has a rectangular shape defined by four outer edges, and the light source portion includes a first light source, a second light source, and a third light source, and the first light source, the first light source. The second light source and the third light source are arranged along a projected portion in which three outer edges of the four outer edges of the translucent portion are projected along the normal direction.

In certain embodiments, the luminaire further comprises a reflective member disposed within the housing.

In certain embodiments, the reflective member is arranged in a projection region on which the translucent portion is projected along the normal direction.

In certain embodiments, the light source unit includes a light source substrate provided with a light emitting element and a cover member that covers the light source substrate. The light source substrate extends in the longitudinal direction, and the cover member includes a groove portion provided with a plurality of grooves extending in the longitudinal direction.

In certain embodiments, the groove of the cover member is provided at a position facing the projected region on which the translucent surface is projected along the normal direction.

According to the luminaire of the present invention, it is possible to suppress the loss of light and efficiently irradiate a wide irradiation range with light.

(A) is a schematic perspective view of the luminaire of the present embodiment, and (b) is a schematic perspective view showing a usage mode of the luminaire of (a). It is a schematic exploded perspective view of the luminaire of this embodiment. (A) is a schematic front view of the luminaire of the present embodiment, (b) is a sectional view taken along the line IIIB-IIIB of (a), and (c) is a sectional view of (a). It is sectional drawing along the line IIIC-IIIC. (A) is a schematic diagram showing the light emitted from the first light source and the second light source of the luminaire of the present embodiment, and (b) is the same light source as the first light source and the second light source for comparison. It is a schematic diagram which shows the emitted light when it is arranged facing a light-transmitting part, and (c) is a schematic diagram which shows the emitted light from the 3rd light source of the luminaire of this embodiment. It is a schematic exploded perspective view of the luminaire of this embodiment. (A) is a schematic perspective view of a light source portion in the luminaire of the present embodiment, and (b) is a schematic back view of a cover member of the light source portion of (a). 6 is a schematic cross-sectional view taken along the line VII-VII of FIG. 6A. (A) is a schematic diagram showing the light emitted from the light emitting element in the light source portion of the luminaire of the present embodiment, and (b) is a schematic diagram showing the light emitted from the light source portion of the luminaire of the present embodiment. Is. It is a schematic exploded perspective view of the luminaire of this embodiment. (A) is a schematic cross-sectional view of the luminaire of the present embodiment along the X direction, and (b) is a schematic cross-sectional view of the luminaire of the present embodiment along the Z direction.

Hereinafter, embodiments of the luminaire according to the present invention will be described with reference to the drawings. In the figure, the same or corresponding parts are designated by the same reference numerals and the description is not repeated. In the specification of the present application, in order to facilitate understanding of the invention, X-axis, Y-axis and Z-axis which are orthogonal to each other may be described. Typically, the X and Y axes are horizontally parallel and the Z axis is vertically parallel. Further, in the specification of the present application, in order to facilitate understanding of the invention, x-axis, y-axis and z-axis which are orthogonal to each other may be described. Typically, the x-axis extends parallel to the longitudinal direction of the light source, and the y-axis and z-axis extend perpendicular to the longitudinal direction of the light source.

The lighting fixture 100 of the present embodiment will be described with reference to FIG. FIG. 1A is a schematic perspective view of the luminaire 100 of the present embodiment. The luminaire 100 includes a housing 110 and a light source unit 120. The housing 110 has a space inside. The light source unit 120 emits light. The light source unit 120 is arranged inside the housing 110.

The housing 110 has a shielding portion 110s and a light transmitting portion 110t. The shielding portion 110s blocks the light, while the translucent portion 110t transmits the light. The light transmitting portion 110t is surrounded by the shielding portion 110s. The light emitted from the light source unit 120 is blocked by the shielding unit 110s, while being selectively emitted from the housing 110 via the light transmitting unit 110t.

Here, the outer surface of the housing 110 has a substantially rectangular parallelepiped shape. The housing 110 has a front surface 110a, a back surface 110b, an upper surface 110c, a bottom surface 110d, a right side surface 110e, and a left side surface 110f. The light transmitting portion 110t is provided on a part of the front surface 110a of the housing 110. For example, the translucent portion 110t is arranged vertically upward on the front surface 110a of the housing 110.

The translucent portion 110t has a translucent surface extending in the XZ plane. The normal direction of the translucent surface is parallel to the Y direction.

In one example, the translucent portion 110t has a substantially rectangular shape. The outer edge of the translucent portion 110t has an upper portion, a lower portion, and two side portions. The upper part and the lower part of the light transmitting portion 110t extend parallel to the X direction, respectively, and the two side portions extend parallel to the Z direction.

The light transmitting portion 110t may be formed of a light transmitting material. For example, the translucent material includes a transparent resin or glass. Alternatively, the translucent portion 110t may be opened.

As described above, the light source unit 120 emits light. The light emitted from the light source unit 120 is emitted from the inside of the housing 110 to the outside of the housing 110 via the light transmitting unit 110t.

The light source unit 120 emits light along the optical axis. The light emitted from the light source unit 120 travels away from the light source unit 120 within the range of the emission angle. Typically, the optical axis of the light source unit 120 is located at the center of the emission angle. Therefore, when the distance from the light source unit 120 is constant, the light intensity of the light source unit 120 on the optical axis is larger than the light intensity around the optical axis. For example, the light source unit 120 includes a plurality of light emitting elements. The light emitting element includes a light emitting diode.

In the lighting fixture 100 of the present embodiment, the light source unit 120 is arranged so as to face obliquely with respect to the light transmitting unit 110t. As a result, the luminaire 100 can efficiently irradiate the irradiation target facing the luminaire 100 over a wide range while suppressing light loss.

Further, when the light-transmitting surface is viewed from the normal direction (y direction) of the light-transmitting surface of the light-transmitting unit 110t, the light source unit 120 is arranged at a position overlapping the shielding unit 110s in the Y-axis direction. Therefore, the light source unit 120 cannot be seen when viewed from the outside of the housing 110 along the normal direction of the translucent surface. As a result, since the light source unit 120 cannot be seen directly from the normal direction of the translucent surface, glare (glare) of the irradiation light from the light source unit 120 can be suppressed.

The light source unit 120 is preferably arranged adjacent to the projection region in which the light transmissive unit 110t is projected along the normal direction (y direction) of the translucent surface of the translucent unit 110t. As a result, the light from the light source unit 120 is emitted from the housing 110 with little loss.

Here, the light source unit 120 includes a first light source 120A, a second light source 120B, and a third light source 120C. The first light source 120A, the second light source 120B, and the third light source 120C are arranged adjacent to the projection region on which the translucent portion 110t is projected.

For example, the first light source 120A extends in the Z direction and is located on the + X direction side with respect to the light transmitting portion 110t. The second light source 120B extends in the Z direction and is located on the −X direction side with respect to the translucent portion 110t. Further, the third light source 120C extends in the X direction and is located on the −Z direction side with respect to the light transmitting portion 110t.

The first light source 120A, the second light source 120B, and the third light source 120C each face obliquely with respect to the translucent portion 110t. Therefore, the light emitted from the first light source 120A and passing through the translucent portion 110t irradiates the region located on the −X direction side with respect to the translucent portion 110t. Further, the light emitted from the second light source 120B and passing through the translucent portion 110t irradiates the region located on the + X direction side with respect to the translucent portion 110t. Further, the light emitted from the third light source 120C and passing through the translucent portion 110t irradiates the region located on the + Z direction side with respect to the translucent portion 110t.

As described above, the translucent portion 110t may be opened. However, it is preferable that the opened translucent portion 110t is covered with a translucent material. In this case, the translucent material may be arranged inside the housing 110 or may be arranged outside the housing 110. Further, the translucent material may be a diffusing member that diffuses light. As a result, the luminaire 100 can efficiently widen the irradiation range of the light emitted from the light source unit 120.

The luminaire 100 preferably further includes a reflective member 130. The reflective member 130 reflects light. The reflective member 130 is arranged in the housing 110.

Typically, the reflective member 130 is white. For example, the reflective member 130 is formed by applying a metal plate with a white paint.

For example, the reflective member 130 is a flat plate. Alternatively, the reflective member 130 may be a plate member bent in the −Y direction along the Z direction.

The reflective member 130 is arranged so as to correspond to the light transmitting portion 110t. At least a part of the reflecting member 130 is arranged so as to overlap the light transmitting portion 110t when the light transmitting portion 110t is viewed from the front. In this case, the reflecting member 130 is located in the projection region projected along the normal direction of the translucent surface in the translucent portion 110t.

It is preferable that the entire reflective member 130 is arranged so as to overlap the light transmitting portion 110t. Even if the light emitted from the light source unit 120 temporarily returns to the inside of the housing 110 due to reflection or the like before passing through the light transmitting unit 110t, when the reflecting member 130 reflects this light, the light is transmitted. Light can be emitted to the outside of the housing 110 via the unit 110t. Therefore, the light emitted from the light source unit 120 can be more effectively used by the reflecting member 130.

At least one of the first light source 120A, the second light source 120B, the third light source 120C, and the reflecting member 130 is fixed inside the housing 110. For example, at least one of the first light source 120A, the second light source 120B, the third light source 120C, and the reflecting member 130 may be supported by the same member and fixed inside the housing 110.

The lighting fixture 100 of the present embodiment is suitably used for irradiating a wall or the like. FIG. 1B is a schematic perspective view showing a usage mode of the lighting equipment 100 of the present embodiment. Here, the luminaire 100 illuminates the wall W.

The luminaire 100 irradiates light in the + Y direction as a whole. The luminaire 100 is arranged on the −Y direction side with respect to the wall W. As can be seen from FIGS. 1A and 1B, the luminaire 100 can illuminate the wall W over a wider range than the translucent portion 110t.

Here, a part of the luminaire 100 is embedded in the ground. However, the translucent portion 110t of the housing 110 is arranged on the ground. The luminaire 100 may be arranged so that the entire luminaire 100 is exposed without being partially embedded. For example, the luminaire 100 may be installed in the air via a support member.

The luminaire 100 may be used as a wall washer that illuminates the wall surface. Alternatively, the luminaire 100 may be used as a ground washer that illuminates the ground.

Next, the luminaire 100 of the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 2 is a schematic exploded perspective view of the luminaire 100 of the present embodiment. Here, in order to avoid the drawing from becoming excessively complicated, a part of the right side surface 110e is omitted.

As shown in FIG. 2, the housing 110 has a cover 112 and a container 114. By attaching the cover 112 to the container 114, the housing 110 is formed.

Here, the cover 112 has a plate shape provided with an opening as the translucent portion 110t. The cover 112 constitutes the front surface 110a of the housing 110. Further, the container 114 constitutes the back surface 110b, the upper surface 110c, the bottom surface 110d, the right side surface 110e, and the left side surface 110f of the housing 110.

The container 114 has a box shape with one side open. The outer edge shape of the opening surface of the container 114 matches the outer edge shape of the cover 112. The container 114 houses the first light source 120A, the second light source 120B, and the third light source 120C. Further, the container 114 may contain the reflective member 130. The outer peripheral surface of the container 114 is formed as a shielding portion 110s. On the other hand, the cover 112 is provided with a shielding portion 110s and a translucent portion 110t.

By attaching the cover 112 to the container 114, a housing 110 containing the first light source 120A, the second light source 120B, the third light source 120C, and the reflecting member 130 can be formed.

The luminaire 100 preferably further includes a support member 140. The support member 140 is housed in the housing 110. The support member 140 supports at least one of the first light source 120A, the second light source 120B, the third light source 120C, and the reflection member 130. For example, the support member 140 supports and fixes the first light source 120A, the second light source 120B, the third light source 120C, and the reflection member 130 inside the housing 110. The first light source 120A, the second light source 120B, the third light source 120C, and the reflecting member 130 are attached to the + Y direction side of the support member 140.

In FIG. 2, the support member 140 is attached to the upper surface 110c of the housing 110. However, the support member 140 may be attached to the back surface 110b of the housing 110.

Next, the luminaire 100 of the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 3A is a schematic front view of the luminaire 100 of the present embodiment, FIG. 3B is a cross-sectional view taken along the line IIIB-IIIB of FIG. 3A, and FIG. (C) is a cross-sectional view taken along the line IIIC-IIIC of FIG. 3 (a). In FIG. 3A, the first light source 120A, the second light source 120B, the third light source 120C, and the reflecting member 130 housed inside the housing 110 are shown by broken lines.

The translucent portion 110t has a translucent surface extending in the XY plane. The normal direction of the translucent surface is parallel to the Y direction. The first light source 120A, the second light source 120B, and the third light source 120C each face obliquely with respect to the translucent portion 110t.

The first light source 120A emits light along the optical axis La. The light emitted from the first light source 120A travels away from the first light source 120A within the range of the emission angle. The optical axis La of the first light source 120A is located at the center of the emission angle. For example, the first light source 120A includes a plurality of light emitting elements. The light emitting element includes a light emitting diode.

The second light source 120B emits light along the optical axis Lb. Further, the third light source 120C emits light along the optical axis Lc. Here, the second light source 120B and the third light source 120C have the same configuration as the first light source 120A.

The first light source 120A is arranged on the + X direction side and the −Y direction side with respect to the light transmitting portion 110t. The first light source 120A is arranged so as to face the translucent portion 110t. Therefore, the first light source 120A is arranged so as to be inclined toward the −X direction with respect to the + Y direction. The optical axis La of the first light source 120A passes through the center of the translucent portion 110t in the X direction.

The second light source 120B is arranged on the −X direction side and the −Y direction side with respect to the translucent portion 110t. The second light source 120B is arranged so as to face the translucent portion 110t. Therefore, the second light source 120B is arranged so as to be inclined toward the + X direction with respect to the + Y direction. The optical axis Lb of the second light source 120B passes through the center of the translucent portion 110t in the X direction.

The third light source 120C is arranged on the −Z direction side and the −Y direction side with respect to the translucent portion 110t. The third light source 120C is arranged so as to face the translucent portion 110t. Therefore, the third light source 120C is arranged so as to be inclined toward the + Z direction with respect to the + Y direction. The optical axis Lc of the third light source 120C passes through the center of the translucent portion 110t in the Z direction.

As described above, the optical axes La, Lb, and Lc of the first light source 120A, the second light source 120B, and the third light source 120C pass diagonally through the translucent portion 110t. Further, the optical axes La, Lb, and Lc of the first light source 120A, the second light source 120B, and the third light source 120C pass through the centers of the translucent portion 110t in the X and Z directions. As a result, even if the emission angles of the first light source 120A, the second light source 120B, and the third light source 120C are relatively large, most of the emitted light of the first light source 120A, the second light source 120B, and the third light source 120C is used. The irradiation target can be irradiated.

As shown in FIG. 3A, the first light source 120A is arranged on the −X direction side with respect to the projection region on which the translucent portion 110t is projected. The optical axis La of the first light source 120A passes through the center of the translucent portion 110t in the X direction. Therefore, the light emitted from the first light source 120A passes through the translucent portion 110t and is emitted to the outside of the housing 110.

The angle formed by the optical axis La of the first light source 120A and the translucent surface of the translucent portion 110t is preferably 45 ° or less. This angle may be 10 ° or more and 45 ° or less, or 15 ° or more and 40 ° or less. However, the angle formed by the optical axis La of the first light source 120A and the translucent surface of the translucent portion 110t may exceed 45 °.

Similarly, the second light source 120B is arranged on the + X direction side with respect to the projection region on which the translucent portion 110t is projected. The optical axis Lb of the second light source 120B passes through the center of the translucent portion 110t in the X direction. Therefore, the light emitted from the second light source 120B passes through the translucent portion 110t and is emitted to the outside of the housing 110.

The angle formed by the optical axis Lb of the second light source 120B and the translucent surface of the translucent portion 110t is preferably 45 ° or less. This angle may be 10 ° or more and 45 ° or less, or 15 ° or more and 40 ° or less. However, the angle formed by the optical axis Lb of the second light source 120B and the translucent surface of the translucent portion 110t may exceed 45 °.

Further, the third light source 120C is arranged on the −Z direction side with respect to the projection region on which the translucent portion 110t is projected. The optical axis Lc of the third light source 120C passes through the center of the translucent portion 110t in the Z direction. Therefore, the light emitted from the third light source 120C passes through the translucent portion 110t and is emitted to the outside of the housing 110.

The angle formed by the optical axis La of the third light source 120C and the translucent surface of the translucent portion 110t is preferably 45 ° or less. This angle may be 10 ° or more and 45 ° or less, or 15 ° or more and 40 ° or less. However, the angle formed by the optical axis Lc of the third light source 120C and the translucent surface of the translucent portion 110t may exceed 45 °.

Next, the irradiation light of the luminaire 100 of the present embodiment will be described with reference to FIG. FIG. 4A is a schematic view showing the light emitted from the first light source 120A and the second light source 120B of the luminaire 100 of the present embodiment. Here, the luminaire 100 is arranged so as to face the wall W to be irradiated.

As shown in FIG. 4A, the light emitted from the first light source 120A passes through the translucent portion 110t and is emitted to the outside of the housing 110. The light emitted from the optical axis La of the first light source 120A at an emission angle in a specific range is irradiated to the wall W in the irradiation range LA. In the luminaire 100 of the present embodiment, the first light source 120A faces obliquely with respect to the light transmitting portion 110t. Therefore, the wall W can be irradiated with high efficiency and a wide irradiation range LA by suppressing loss due to light reflection.

Similarly, the light emitted from the second light source 120B passes through the translucent portion 110t and is emitted to the outside of the housing 110. The light emitted from the optical axis Lb of the second light source 120B at an emission angle in a specific range is irradiated to the wall W in the irradiation range LB. In the lighting fixture 100 of the present embodiment, since the second light source 120B faces obliquely with respect to the light transmitting portion 110t, it is possible to irradiate the wall W with high efficiency and a wide irradiation range LB by suppressing loss due to light reflection.

However, the luminaire 100 of the present embodiment may emit the reflected light to the outside. For example, a part of the light emitted from the first light source 120A or the second light source 120B may be reflected by the shielding portion 110s of the front surface 110a of the housing 110. However, by arranging the reflecting member 130 between the first light source 120A and the second light source 120B, the light reflected by the shielding portion 110s of the housing 110 can also be emitted to the outside of the housing 110. The luminaire 100 can emit light from the first light source 120A and the second light source 120B to a region between the irradiation range LA and the irradiation range LB by the reflecting member 130.

As described above with reference to FIG. 4A, in the luminaire 100 of the present embodiment, the first light source 120A and the second light source 120B are oriented obliquely with respect to the light transmitting portion 110t, respectively. Therefore, the light emitted from the first light source 120A and the second light source 120B is irradiated to the wall W in a wide irradiation range LA and LB.

Here, for comparison, the emitted light of the luminaire 800 will be described. FIG. 4B is a schematic view showing the emitted light of the luminaire 800 including the housing 810 and the light source 820. The housing 810 has a shielding portion 810s and a translucent portion 810t, similarly to the housing 110. The light source 820 has the same optical characteristics as the first light source 120A and the second light source 120B. However, the light source 820 is arranged so as to face the translucent portion 810t. Here, the distance between the luminaire 800 and the wall W is equal to the distance between the luminaire 100 and the wall W.

As shown in FIG. 4B, the light source 820 is arranged so as to face the light transmitting portion 810t. In this case, the light emitted from the light source 820 travels toward the translucent portion 810t. After that, the light from the light source 820 passes through the translucent portion 810t and is emitted to the outside of the housing 810. The light emitted from the optical axis Lx of the light source 820 at an emission angle in a specific range is irradiated to the wall W in the irradiation range LX.

In the luminaire 800, the light source 820 faces the translucent portion 810t, and the loss due to light reflection is suppressed. Further, since the light source 820 faces the translucent portion 810t, the light emitted at an emission angle in a specific range with respect to the optical axis Lx of the light source 820 irradiates the wall W in the irradiation range LX.

As can be understood from the comparison between FIGS. 4A and 4B, in the luminaire 800, the light source 820 faces the translucent portion 810t, and the irradiation range LX by the luminaire 800 is compared. Narrow. On the other hand, in the luminaire 100 of the present embodiment, the first light source 120A and the second light source 120B are oriented obliquely with respect to the translucent portion 110t. Therefore, not only the loss due to light reflection can be suppressed, but also the wall W can be irradiated with a wide irradiation range LA and LB.

FIG. 4C is a schematic view showing the light emitted from the third light source 120C of the luminaire 100 of the present embodiment. As shown in FIG. 4C, the light from the third light source 120C passes through the translucent portion 110t and is emitted to the outside of the housing 110. The light emitted from the optical axis Lc of the third light source 120C at an emission angle in a specific range is irradiated to the wall W in the irradiation range LC. In the lighting fixture 100 of the present embodiment, since the third light source 120C faces obliquely with respect to the light transmitting portion 110t, it is possible to irradiate the wall W with high efficiency and a wide irradiation range LC by suppressing loss due to light reflection.

In the above description with reference to FIGS. 3 and 4, the optical axes La, Lb, and Lc of the first light source 120A, the second light source 120B, and the third light source 120C are in the X direction and the Z direction of the translucent portion 110t. Although it has passed through the center, the present embodiment is not limited to this. The optical axes La, Lb, and Lc of the first light source 120A, the second light source 120B, and the third light source 120C do not have to pass through the centers of the translucent portion 110t in the X and Z directions. However, it is preferable that the optical axes La, Lb, and Lc of the first light source 120A, the second light source 120B, and the third light source 120C pass relatively close to the center of the translucent portion 110t in the X and Z directions.

For example, when the optical axis La of the first light source 120A is shifted so as to pass the −X direction side of the center of the translucent portion 110t in the X direction, a part of the light from the first light source 120A shields the housing 110. It may be reflected by the unit 110s and not sufficiently emitted to the outside of the housing 110. Therefore, it is preferable that the optical axis La of the first light source 120A is not too shifted toward the −X direction side with respect to the center of the translucent portion 110t in the X direction.

Alternatively, if the optical axis La of the first light source 120A is shifted so as to pass through the + X direction side of the center of the translucent portion 110t in the X direction, the area of the irradiation range LA becomes smaller. Therefore, it is preferable that the optical axis La of the first light source 120A is not too shifted toward the + X direction with respect to the center of the light transmitting portion 110t in the X direction.

In the above description with reference to FIG. 2, the housing 110 is composed of the container 114 and the cover 112, but the present embodiment is not limited thereto. The housing 110 may be composed of three or more members.

Next, the luminaire 100 of the present embodiment will be described with reference to FIGS. 1 and 5. FIG. 5 is a schematic exploded perspective view of the luminaire 100 of the present embodiment.

As shown in FIG. 5, the housing 110 includes a cover 112a, a main body 114a, and a frame 114b. The container 114 is formed by the combination of the main body 114a and the frame 114b. Typically, after combining the frame body 114b and the cover 112a, the main body portion 114a is fitted. However, the cover 112a may be combined after the main body portion 114a is first fitted to the frame body 114b. As a result, the housing 110 can be formed.

Here, the cover 112a constitutes a front surface 110a of the housing 110, a part of the right side surface 110e, and a part of the left side surface 110f. The front surface 110a, a part of the right side surface 110e, and a part of the left side surface 110f are connected to each other. A light transmitting portion 110t is provided on the front surface 110a of the housing 110.

The main body 114a constitutes the upper surface 110c of the housing 110. A reflective member 130 is connected to the upper surface 110c. Here, the first light source 120A, the second light source 120B, and the third light source 120C are attached to the + Y direction side of the reflection member 130, and the reflection member 130 has the first light source 120A, the second light source 120B, and the third light source 120C. Support. The reflective member 130 functions as a support member.

Further, a back surface facing portion 111b is connected to the end portion of the upper surface 110c in the −Y direction so as to face the reflective member 130. A left side facing portion 111f is connected to the + X direction end portion of the upper surface 110c.

The frame body 114b constitutes a back surface 110b, a bottom surface 110d, a part of the right side surface 110e, and a part of the left side surface 110f of the housing 110. The back surface 110b of the frame body 114b is connected to the bottom surface 110d, a part of the right side surface 110e, and a part of the left side surface 110f, respectively.

The back surface 110b of the frame 114b, a part of the right side surface 110e, and a part of the left side surface 110f are configured so that the upper surface 110c of the main body 114a fits into the frame body 114b. By fitting the main body 114a into the frame 114b, the back surface 110b of the frame 114b faces the back surface facing portion 111b of the main body 114a, and a part of the left side surface 110f of the frame 114b is formed by the main body 114a. It faces the left side facing portion 111f.

As described above, the lighting fixture 100 may be manufactured by combining the main body 114a, the frame 114b, and the cover 112a.

If the exit angle of the emitted light emitted from the light source unit 120 arranged inside the housing 110 is too large, a part of the emitted light does not pass through the light transmitting unit 110t and is housed by the shielding unit 110s. It may be reflected inside the 110 and not emitted from the inside of the housing 110 to the outside. Therefore, it is preferable that the range of the emission angle of the emitted light from the light source unit 120 is relatively narrow. On the other hand, from the viewpoint of cost and the like, it may not be possible to use a light emitting element having a relatively narrow emission angle in the light source unit 120. In this case, it is preferable to control the emitted light of the light emitting element having a relatively wide emission angle.

Next, the light source unit 120 in the luminaire 100 of the present embodiment will be described with reference to FIGS. 6 to 8. FIG. 6A is a schematic exploded perspective view of the light source unit 120 preferably used in the luminaire 100 of the present embodiment.

As shown in FIG. 6A, the light source unit 120 includes a light source substrate 122 and a cover member 124. The light source substrate 122 extends in the longitudinal direction (x direction).

The light source substrate 122 includes a substrate 122a and a light emitting element 122b. The substrate 122a defines an outer edge of the light source substrate 122 along the x-direction and the y-direction. The light emitting element 122b is arranged on the main surface of the substrate 122a. Here, the plurality of light emitting elements 122b are arranged at predetermined intervals along the x direction on the main surface of the substrate 122a.

The cover member 124 is a hollow container. The cover member 124 is transparent or translucent.

The opening of the cover member 124 corresponds to the outer edge of the substrate 122a. The cover member 124 covers the substrate 122a together with the light emitting element 122b.

FIG. 6B is a schematic bottom view of the cover member 124. A flat portion 124a and a groove portion 124b are provided on the bottom surface of the opening of the cover member 124. The flat portion 124a has a flat surface. The flat portion 124a is provided on substantially half of the bottom surface of the opening of the cover member 124 on the −y direction side. A plurality of grooves are provided in the groove portion 124b. The groove portion 124b is provided on substantially half of the bottom surface of the opening of the cover member 124 on the + y direction side. The groove portion 124b extends in the x direction like the substrate 122a. The groove portion 124b largely deflects the incident light and emits it. The groove portion 124b functions as a diffraction grating.

FIG. 7 is a schematic cross-sectional view taken along the IVC-IVC line of FIG. 6 (a). The light emitting element 122b is arranged at the center of the substrate 122a in the y direction.

The cover member 124 has a box shape with one side open. The cover member 124 has an outer peripheral surface 124p and an inner peripheral surface 124q. As shown in FIG. 7, the inner peripheral surface 124q includes a side surface 124q1, a main surface 124q2, and a side surface 124q3. The main surface 124q2 is the open bottom surface of the cover member 124. The side surface 124q1 is located on the −y direction side with respect to the main surface 124q2, and the side surface 124q3 is located on the + y direction side with respect to the main surface 124q2.

A flat portion 124a is provided on the −y direction side of the main surface 124q2 of the cover member 124. The flat portion 124a is flat.

A groove portion 124b is provided on the + y direction side of the main surface 124q2 of the cover member 124. A plurality of rows of grooves 124v are alternately provided in the groove portions 124b along the y direction. The groove 124v extends in the x direction. Here, nine rows of grooves 124v are alternately provided in the groove portions 124b of the cover member 124 along the x direction.

The groove 124v includes an outer surface d1 and an inner surface d2. In the groove portion 124b, the plurality of outer surfaces d1 and the plurality of inner surface surfaces d2 are alternately arranged in the y direction to form a plurality of grooves 124v.

Virtual first reference planes ds1 and second reference planes ds2 can be defined from the lower and upper parts of the outer side surface d1 and the inner side surface d2 in the z direction, respectively. The first reference plane ds1 is located on the −z direction side with respect to the second reference plane ds2.

As shown in FIG. 7, the groove 124v is recessed from the center of the cover member 124 toward the outside. In this case, the angle of the outer surface d1 with respect to the second reference surface ds2 is larger than the angle of the inner surface d2 with respect to the second reference surface ds2.

Further, the depth (length in the z direction) H that defines the groove 124v is smaller than the width (length in the y direction) W that defines the groove 124v. For example, the width W is 1.1 times or more and 5.0 times or less than the depth H.

The light emitted from the light emitting element 122b and reaching the outer surface d1 is reflected by the outer surface d1 and then passes through the inner surface d2 and travels in the + z direction and the −y direction. Further, the light emitted from the light emitting element 122b and reaching the inner surface d2 is reflected by the inner surface d2 toward the outer surface d1, then reflected by the outer surface d1, and then passes through the inner surface d2 and + z. Proceed in the direction and the −y direction. In this way, the groove portion 124b located on the + y direction side of the center of the cover member 124 in the y direction deflects the incident light toward the −y direction.

Next, the emitted light of the light source unit 120 will be described with reference to FIGS. 6 to 8. FIG. 8A is a schematic view of the light source substrate 122 in the luminaire 100 of the present embodiment.

As described above, the light source substrate 122 includes the substrate 122a and the light emitting element 122b. The light emitting element 122b is provided on the substrate 122a.

The substrate 122a has a thin plate shape. The normal of one of the two main surfaces of the substrate 122a is oriented in the + z direction, and the normal of the other main surface is oriented in the −z direction. The light emitting element 122b is arranged at the center in the y direction on the main surface of the substrate 122a facing the + z direction. The light emitting element 122b emits light in the + z direction.

In FIG. 8A, the broken line pointing in the + z direction from the light emitting element 122b indicates the optical axis L0 of the light emitting element 122b. Further, in FIG. 8A, the broken lines extending from the light emitting element 122b in the −y direction and the + y direction with respect to the + z direction indicate the spread of the emission angle of the light emitting element 122b. As shown in FIG. 8A, the light emitting element 122b emits light that spreads in an isometric shape.

As described above, the light emitting element 122b is covered with the cover member 124. When the cover member 124 is provided with the groove portion 124b, the groove portion 124b deflects the light from the light emitting element 122b in a specific direction.

Next, the emitted light of the light source unit 120 will be described with reference to FIG. 8 (b). FIG. 8B is a schematic view showing the light source unit 120. The light source unit 120 includes a light source substrate 122 and a cover member 124. The cover member 124 covers the light source substrate 122. Specifically, the cover member 124 covers the light emitting element 122b together with the substrate 122a.

In the cover member 124, a flat portion 124a is provided on the −y direction side, and a groove portion 124b is provided on the + y direction side.

As shown in FIG. 8B, the light traveling from the light emitting element 122b tilting toward the −y direction with respect to the + z direction passes through the flat portion 124a and is emitted to the outside. Strictly speaking, light is refracted when it enters the flat portion 124a and when it is emitted from the flat portion 124a, but in FIG. 8B, a part of this light travels linearly as transmitted light. It is shown as L1.

On the other hand, the light traveling from the light emitting element 122b tilting toward the + y direction with respect to the + z direction is largely deflected in the groove portion 124b and emitted to the outside. In FIG. 8B, a part of this light is shown as polarized light L2 that travels by being deflected. The angle formed by the optical axis L0 of the light emitting element 122b and the transmitted light L1 is larger than the angle formed by the optical axis L0 of the light emitting element 122b and the deflected light L2. Therefore, as the deflected light L2 advances, the deflected light L2 intersects with the transmitted light L1.

When the emission angle of the light emitting element 122b is large, the component of the light emitted from the light emitting element 122b that travels at an angle away from the optical axis L0 cannot pass through the light transmitting portion 110t of the housing 110 and is prevented by the shielding portion 110s. May be reflected. However, the cover member 124 provided with the groove portion 124b can deflect the component of the light emitted from the light emitting element 122b that travels at an angle away from the optical axis L0 so as to pass through the light transmitting portion 110t of the housing 110. Therefore, the emitted light of the light emitting element 122b can be effectively used. It should be noted that the light source unit 120 provided with the cover member 124 provided with the groove portion 124b described above with reference to FIGS. 6B to 8B is used as the first light source 120A, the second light source 120B, and the second light source 120B of the lighting fixture 100. When used as the three light sources 120C, the groove portion 124b is preferably arranged at a position facing the projection region on which the light transmitting portion 110t is projected. The groove portion 124b of the cover member 124 is arranged inside and the flat portion 124a is arranged outside with respect to the projection region on which the light transmitting portion 110t is projected.

Hereinafter, the lighting fixture 100 of the present embodiment will be described with reference to FIGS. 6 to 10. FIG. 9 is a schematic exploded perspective view of the luminaire 100 of the present embodiment. FIG. 10A is a schematic cross-sectional view of the luminaire 100 of the present embodiment along the X direction, and FIG. 10B is a schematic view of the luminaire 100 of the present embodiment along the Z direction. It is a cross-sectional view. The luminaire 100 of FIGS. 9 and 10 is shown in FIGS. 2, 3 (b) and 3 (c), except that the cover member 124 of the light source unit 120 is provided with a groove portion 124b together with a flat portion 124a. It has the same configuration as the luminaire 100 shown, and duplicated descriptions are omitted in order to avoid redundancy. It should be noted that, unlike FIG. 6A, FIGS. 9 and 10 show the groove portion 124b so as to be visible from the cover member 124 of the light source portion 120.

As shown in FIGS. 9 and 10A, in the first light source 120A, the groove portion 124b of the cover member 124 is arranged on the −X direction side, and the flat portion 124a is arranged on the + X direction side. By arranging the groove portion 124b of the first light source 120A inside the housing 110 in this way, the light emitted from the light emitting element 122b and traveling away from the light transmitting portion 110t is used as the deflecting light La2 in the translucent portion 110t. Since it can be deflected, the light emitted from the light emitting element 122b can be effectively used.

Further, as shown in FIG. 10A, in the second light source 120B, the groove portion 124b of the cover member 124 is arranged on the + X direction side, and the flat portion 124a is arranged on the −X direction side. By arranging the groove portion 124b of the second light source 120B inside the housing 110 in this way, the light emitted from the light emitting element 122b and traveling away from the light transmitting portion 110t is used as the deflecting light Lb2 in the translucent portion 110t. Since it can be deflected, the light emitted from the light emitting element 122b can be effectively used.

Further, as shown in FIG. 10B, in the third light source 120C, the groove portion 124b of the cover member 124 is arranged on the + Z direction side, and the flat portion 124a is arranged on the −Z direction side. By arranging the groove portion 124b of the third light source 120C inside the housing 110 in this way, the light emitted from the light emitting element 122b and traveling away from the light transmitting portion 110t is used as the deflecting light Lc2 in the translucent portion 110t. Since it can be deflected, the light emitted from the light emitting element 122b can be effectively used.

When the groove portion 124b is provided inside the cover member 124 in the first light source 120A, the optical axis La0 of the light emitting element 122b in the first light source 120A is located on the −X direction side of the center of the light transmitting portion 110t in the X direction. It is preferable to pass through the portion to be used. Since the groove portion 124b can deflect the light emitted from the light emitting element 122b and traveling away from the light transmitting portion 110t to the light transmitting portion 110t, the light emitted from the light emitting element 122b can be used more effectively. Further, most of the light traveling in the direction inclined in the + y direction with respect to the optical axis La0 of the light emitting element 122b can pass through the translucent portion 110t as transmitted light La1. Therefore, the light emitted from the light emitting element 122b can be used more effectively.

Similarly, when the groove portion 124b is provided inside the cover member 124 in the second light source 120B, the optical axis Lb0 of the light emitting element 122b in the second light source 120B is located on the + X direction side of the center of the light transmitting portion 110t in the X direction. It is preferable to pass through the portion to be used. Further, most of the light traveling in the direction inclined in the + y direction with respect to the optical axis Lb0 of the light emitting element 122b can pass through the light transmitting portion 110t as transmitted light Lb1. Therefore, the light emitted from the light emitting element 122b can be used more effectively.

Further, when the groove portion 124b is provided inside the cover member 124 in the third light source 120C, the optical axis Lc0 of the light emitting element 122b in the third light source 120C is located on the + Z direction side of the center of the light transmitting portion 110t in the Z direction. It is preferable to pass through the portion. Further, most of the light traveling in the direction inclined to the + y direction with respect to the optical axis Lc0 of the light emitting element 122b can pass through the light transmitting portion 110t as transmitted light Lc1. Therefore, the light emitted from the light emitting element 122b can be used more effectively.

In the above description with reference to FIGS. 1 to 10, the first light source 120A, the second light source 120B, and the third light source 120C are arranged so as to correspond to the two side portions and the lower portion on the outer edge of the translucent portion 110t. However, this embodiment is not limited to this. Any one of the first light source 120A, the second light source 120B, and the third light source 120C may be arranged corresponding to the upper portion of the outer edge of the translucent portion 110t.

Further, in the above description with reference to FIGS. 1 to 10, the light source unit 120 includes three light sources, but the present embodiment is not limited to this. The light source unit 120 may include one or two light sources. Alternatively, the light source unit 120 may include four or more light sources. When the light source unit 120 includes four light sources, the light sources may be arranged adjacent to all of the upper portion, the lower portion, and the two side portions which are the rectangular outer edges of the translucent portion 110t.

The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiment, and can be implemented as an embodiment in various embodiments without departing from the gist thereof. In addition, various inventions can be formed by appropriately combining the plurality of components disclosed in the above embodiments. For example, some components may be removed from all the components shown in the embodiments. In order to make the drawings easier to understand, each component is schematically shown, and the number of each component shown may differ from the actual one due to the convenience of drawing. Further, each component shown in the above embodiment is an example, and is not particularly limited, and various modifications can be made without substantially deviating from the effect of the present invention.

The present invention is useful for luminaires.

100 Lighting equipment 110 Housing 110t Translucent part 120 Light source part 120A 1st light source 120B 2nd light source 120C 3rd light source

Claims (9)

With the housing
A lighting fixture including a light source unit arranged inside the housing.
The housing has a translucent portion that transmits light emitted from the light source portion.
The light source unit is a lighting fixture that is arranged so as to be obliquely oriented with respect to the translucent unit. The housing has a shielding portion that shields the light emitted from the light source portion.
The translucent portion has a translucent surface that transmits light emitted from the light source portion.
The luminaire according to claim 1, wherein the light source portion is arranged at a position overlapping the shielding portion of the housing in the normal direction of the translucent surface. The luminaire according to claim 2, wherein the light source unit is arranged adjacent to a projection region on which the translucent unit is projected along the normal direction. The luminaire according to claim 3, wherein the light source unit is arranged adjacent to a part of a projection region on which the translucent unit is projected along the normal direction. The translucent portion has a rectangular shape defined by four outer edges, and has a rectangular shape.
The light source unit includes a first light source, a second light source, and a third light source.
The first light source, the second light source, and the third light source are arranged along a projection portion in which three outer edges of the four outer edges of the translucent portion are projected along the normal direction. Item 4. Lighting equipment according to item 4. The luminaire according to any one of claims 2 to 5, further comprising a reflective member arranged inside the housing. The luminaire according to claim 6, wherein the reflective member is arranged in a projection region on which the translucent portion is projected along the normal direction. The light source unit includes a light source substrate provided with a light emitting element and a cover member covering the light source substrate.
The light source substrate extends in the longitudinal direction and
The luminaire according to any one of claims 2 to 7, wherein the cover member includes a groove portion provided with a plurality of grooves extending in the longitudinal direction. The luminaire according to claim 8, wherein the groove portion of the cover member is provided at a position facing the projection region on which the translucent surface is projected along the normal direction.

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