JP2008098088A - Wide region lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a wide region lighting device having no illumination level difference at boundary connection part of illumination light by enabling a highly efficient light distribution control with few energy loss, and enabling uniform illumination while keeping uniform illuminance in a region from a distant place to the near side. <P>SOLUTION: The wide region lighting device is provided with a substrate 23 on which a plurality of LED light sources are mounted, a first concave reflecting mirror 25 for remote illumination which is arranged with a first LED light source 21 on the substrate 23 as a bottom position and reflects the light from the first LED light source toward an illumination range and a second concave reflecting mirror 27 for near illumination which is arranged with a second LED light source 21 adjoining the first LED light source 21 as a bottom position and reflects the light from the second LED light source 21 toward the illumination range. The second concave reflecting mirror 27 has a slanted cut shape so that the height of the reflecting mirror from the substrate 23 face on the first concave reflecting mirror 25 side may be high and the height of the reflecting mirror on the opposite side to the first concave reflecting mirror 25 may be low. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wide area illumination device that performs illumination from a near area to a far area, and relates to an illumination technique suitable for use in, for example, a wall washer.

  For example, in stores such as stores that display merchandise, in order to indirectly illuminate display / exhibits in museums, etc., the side wall surface is uniformly illuminated from the upper side (ceiling side) to the lower side (floor side) with almost the same illuminance. Various lighting fixtures have been proposed. In order to illuminate uniformly, many methods are adopted to enhance the light diffusion action to remove light unevenness and increase the uniformity of wall illumination.

  In the wall lighting fixture disclosed in Patent Document 1, a plurality of louvers are provided at intervals on the front surface portion of a fixture frame in which a light source is provided. This louver includes a reflective diffusion panel that has a relatively low light transmittance and regulates the light irradiation direction, and a diffusion attenuation panel that has a relatively high light transmittance and diffuses and attenuates light behind the reflective diffusion panel. Consists of.

  According to this configuration, the highly reflective reflection diffusion panel with a relatively low light transmittance plays a role in regulating the light irradiation direction, and the diffusion attenuation panel with a high light transmittance is in front of the reflection diffusion panel. It plays the role of diffusing and attenuating light in the direction crossing the louver. The synergistic effect of the action of the two types of panels enhances the light diffusion action and the light attenuation action in the direction intersecting the louver as a whole.

  Thus, for example, when the side wall surface is illuminated from the ceiling surface, light is diffused and attenuated by the louver to the upper part of the side wall surface, thereby eliminating the band-like shadow and preventing the occurrence of light unevenness. be able to. On the other hand, straight light is guided to the lower part of the side wall surface by the reflection diffusion panel. Since each louver has a pseudo light source by the light diffusing action in the diffusion attenuation panel, the amount of light applied to the lower portion of the side wall surface is substantially increased. Due to these two points, the illuminance increases at the lower portion of the side wall surface compared to the case of using a louver without a diffusion attenuation panel, and the uniformity of the illuminance at the upper and lower side surfaces of the side wall surface is enhanced.

  Moreover, as shown in FIG. 20, the wall surface lighting device 1 disclosed in Patent Document 2 is arranged at a predetermined distance behind the point light source 3 and the point light source 3, and reflects the reflected light beam with respect to the wall surface. A concave reflecting mirror 5 that reflects at a predetermined angle, and is opposed to the concave reflecting mirror 5 at a predetermined distance in front of the point light source 3, and partially crosses the reflected light bundle and into the reflected light bundle. The diverging lens 7 is located.

  According to this configuration, the light from the point light source 3 strikes the concave reflecting mirror 5 and is reflected to become a reflected light beam R1 having a predetermined angle with respect to the wall surface. A predetermined portion of the reflected light bundle R1 does not hit the diverging lens 7, but is illuminated on the wall surface, and an illuminated portion is formed on the wall surface. A portion other than the predetermined portion of the reflected light beam R1 that irradiates the diverging lens 7 is scattered by the diverging lens 7, and is illuminated as a diffused light beam R2 on a surface other than the illuminated portion on the wall surface. Another illuminated portion is formed. As a result, light having a high degree of uniformity in a predetermined direction can be illuminated in a strip shape on the wall surface with a simple structure.

JP-A-9-27206 JP-A-6-68701

However, all of the conventional wall illumination devices described above distribute the direct light from the light source or the reflected light from the reflecting mirror through the louver and the reflective diffusing panel or the diverging lens. However, the illumination efficiency is poor, and it is difficult to perform fine light distribution control that gently connects the boundary portion of the illumination light, and there is a problem that a step occurs in the boundary connection portion of the illumination light. Further, in the configuration including the diverging lens, the diffused light is irradiated in addition to the wall surface, the useless irradiation light increases and the illumination energy is lost, and when other illumination light is present, Other lighting could be adversely affected. For example, the illuminance of an illumination area by another illumination device is excessively increased, or if the other illumination device is colored illumination, color mixing is generated.
The present invention has been made in view of the above situation, and by providing highly efficient light distribution control with less energy loss, a wide-area illumination device that does not cause a step in the illumination light boundary connection portion is provided, and thus far away An object of the present invention is to enable illumination in a state where the illuminance in the region from to the vicinity is kept uniform.

The above object of the present invention is achieved by the following configuration.
(1) A wide-area lighting device having an irradiation range from a far field to a nearby area,
A substrate on which a plurality of LED light sources are mounted;
A first concave light reflector for distant illumination that is disposed with the first LED light source on the substrate as a bottom position and reflects light from the first LED light source toward the illumination range;
A second concave light reflecting mirror for proximity illumination that is arranged with the second LED light source adjacent to the first LED light source as a bottom position and reflects light from the second LED light source toward the illumination range; With
The second concave reflecting mirror is inclined so that the reflecting mirror height from the substrate surface on the first concave reflecting mirror side is high and the reflecting mirror height on the side opposite to the first concave reflecting mirror is low. A wide area lighting device characterized by having a cut shape.

  According to this wide area illumination device, the first concave reflecting mirror that is not cut by the reflecting mirror has a reflecting surface that is symmetrical with respect to the optical axis, and direct light from the LED light source and reflected light reflected by the reflecting surface are generated. It becomes a substantially parallel light and is irradiated to a distant area. On the other hand, the second concave reflecting mirror whose cut surface has been cut sandwiches the optical axis, and the reflecting surface on the first concave reflecting mirror side is irradiated with substantially parallel light in the same manner as the first concave reflecting mirror. On the side (outside), the reflective surface is cut off with an inclination, so that the ratio of direct light from the LED light source is gradually increased while the reflected light traveling toward the front is gradually reduced, and the diffuse illumination effect on the neighboring area Will increase.

(2) A plurality of first concave reflecting mirror rows and second concave reflecting mirror rows each having a plurality of the first concave reflecting mirrors and the second concave reflecting mirrors arranged in a straight line are provided in parallel with each other. (1) The wide area illumination device according to (1).

  According to this wide area illuminating device, by providing a plurality of rows of first concave reflecting mirrors and rows of second concave reflecting mirrors in parallel with each other, the irradiable range is increased and a wide area illumination is possible. . In addition, when compared in the same irradiation region, the illuminance can be increased when irradiation is performed with a large number of rows compared to when irradiation is performed with a small number of rows. Furthermore, since the individual cutting inclination gradients of the second concave reflecting mirror rows become gentler when irradiation is performed in multiple rows, the illumination light boundary connection portions by the respective reflecting mirror rows can be made less noticeable.

(3) The wide area illumination device according to (2), wherein the first concave reflecting mirror and the second concave reflecting mirror are arranged in a staggered manner.

  According to this wide area illumination device, the reflecting mirrors of the second concave reflecting mirror row are arranged close to each other between the reflecting mirrors of the first concave reflecting mirror row, and the separation distance between the reflecting mirror rows is short. Thus, the apparatus can be made compact.

(4) The first concave reflecting mirrors arranged in the first concave reflecting mirror row are set such that the arrangement pitch in the row direction is set shorter than the maximum diameter distance of the first concave reflecting mirror in a plan view circle. The wide-area lighting device according to (2) or (3), which is characterized.

  According to this wide area illuminating device, since the separation distance between the adjacent mirrors in the column direction in the first concave reflecting mirror row is shortened, the shadow of the light from the adjacent LED light source is reduced, and the reflecting mirror in the far illumination area is reduced. The illuminance in the column direction becomes more uniform.

(5) The first concave reflecting mirror and the second concave reflecting mirror are held by a frame panel, and the light irradiation side surface of the frame panel is formed in a satin shape. The wide-area lighting device according to any one of (4).

  According to this wide area illuminating device, even if the light irradiated on the near wall surface is returned to the wide area illuminating device by reflection, the surface on the light irradiation side of the frame panel is made into a satin finish. The reflected light that has been returned is diffused, and it is possible to prevent the occurrence of illuminance unevenness (striped pattern) on the wall surface due to secondary reflection that is likely to occur when the reflector frame panel is a mirror surface.

(6) The wide area illumination device according to any one of (1) to (5), wherein the first concave reflecting mirror has a reflecting surface formed in a satin shape.

  According to this wide area illuminating device, the reflection surface of the first concave reflecting mirror that illuminates far away has a satin-like shape, so that light from the LED light source is prevented from being diffused by the satin-like reflective surface and causing color unevenness. Is done.

(7) The wide area illumination device according to any one of (1) to (6), wherein the second concave reflecting mirror has a reflecting surface formed in a satin shape.

  According to this wide area illuminating device, in particular, the reflecting surface of the second concave reflecting mirror that illuminates the near field has a satin-like shape, so that in addition to the diffuse irradiation action by the inclined cut shape of the second concave reflecting mirror, The reflected light is further diffused by the satin-like reflecting surface, enabling near-field more uniform illumination. That is, the diffusion effect is improved, and illumination with more uniform illuminance is possible.

(8) The reflecting surfaces of the first concave reflecting mirror and the second concave reflecting mirror are formed as paraboloids, and the LED light source is disposed at a focal position of the paraboloid (1). The wide-area lighting device according to any one of to (7).

  According to this wide area illumination device, the light from the LED light source can be collimated by reflecting it with a parabolic mirror, and in particular, it is possible to irradiate far away with the first concave reflecting mirror with high efficiency. Accordingly, a light band extending in the light irradiation direction (direction from the near irradiation region to the far irradiation region) can be formed long.

(9) The LED light sources corresponding to the first concave reflecting mirror row and the second concave reflecting mirror row are connected to a light quantity control means capable of independently controlling the light quantity for each row (2 The wide-area illumination device according to any one of (8) to (8).

  According to this wide area illumination device, by appropriately increasing or decreasing the amount of light of the LED light source array in each mirror array, the joint (border) of illumination from the near irradiation area to the far irradiation area It is possible to prevent illuminance unevenness due to illuminance steps. Thereby, it can prevent reliably that the line resulting from an illuminance difference generate | occur | produces in the said joint part. Further, gradation illumination in which the illuminance of the illumination light gradually changes from the near irradiation region to the far irradiation region is possible. For example, in the case of wall illumination, aesthetically excellent illumination light can be obtained by forming a gradation in which the vicinity of the ceiling is bright and the illuminance gradually decreases toward the floor.

(10) Any one of (2) to (9), wherein each LED light source corresponding to the first concave reflecting mirror row and the second concave reflecting mirror row includes a different color for each row. The wide-area lighting device according to 1.

  According to this wide area illumination device, multicolor illumination in which the color of illumination light changes from the near illumination area to the far illumination area is possible, and an aesthetically superior multicolor display or the like is possible.

(11) The plurality of LED light sources are arranged in one reflecting mirror with respect to at least one of the first concave reflecting mirror and the second concave reflecting mirror. The wide area illumination device according to any one of (10).

  According to this wide area illuminating device, a plurality of LED light sources are provided for one reflecting mirror, and each LED light source is controlled to emit light independently, so that gradation and multiple colors can be set finely. In addition to gradation and multicolor change in the direction from the near illumination area to the far illumination area, the direction along the column direction in which the individual reflectors are arranged (the band-like illumination area extending in the width direction of the apparatus, that is, the perspective direction) Gradation and multicolor change in the width direction) is also possible.

(12) The wide area illumination device according to any one of (1) to (11), wherein the first concave reflecting mirror and the second concave reflecting mirror are integrally formed of a resin material.

  According to this wide area illumination device, molding is simplified and cost reduction is achieved. Further, the relative optical axis positions of the reflecting mirrors in the first concave reflecting mirror row and the second concave reflecting mirror row or the reflecting mirrors between the rows can be maintained with high accuracy. As a result, a high-quality device that does not vary in illuminance can be stably manufactured.

(13) The optical axis of the front second concave reflecting mirror is inclined with respect to the optical axis of the first concave reflecting mirror, according to any one of (1) to (12), Wide area lighting device.

  According to this wide area illuminating device, for example, if the optical axis of the second concave reflecting mirror is tilted in the vicinity irradiation region, the near field can be illuminated with higher illuminance. Further, if the optical axis of the second concave reflecting mirror is tilted to the far irradiation region, the far field can be illuminated with higher illuminance and the near field illuminance can be reduced. Even in this case, there is no illuminance step at the boundary. That is, a gentle and large illuminance difference can be obtained from the far irradiation area to the near irradiation area by illumination without a step.

(14) At least one of the reflecting surface tip portion of the first concave reflecting mirror opposite to the second concave reflecting mirror and the reflecting surface tip portion of the second concave reflecting mirror on the first concave reflecting mirror side. On the other hand, the side reflection function part which reflects the light from the said LED light source along the direction which went to said 2nd concave reflective mirror from said 1st concave reflective mirror was provided. The wide-area lighting device according to any one of the above.

  According to this wide area illuminating device, the side reflected light component is increased by providing the side reflection function section.

(15) The wide-area illumination device according to (14), wherein the side reflection function unit has a shape that warps from the reflecting surface of the concave reflecting mirror to the inside of the concave reflecting mirror.

  According to this wide area illuminating device, the light from the LED light source can be actively reflected to the side by the shape that warps inward.

(16) The wide-area illumination device as set forth in (14), wherein the side reflection function unit is formed with a satin finish on the reflecting surface of the concave reflecting mirror.

  According to this wide area illuminating device, the reflection surface becomes a diffused light and goes to the side by making the reflection surface into a satin finish.

(17) With respect to the reflecting surface of the first concave reflecting mirror opposite to the second concave reflecting mirror, and the reflecting surface of the second concave reflecting mirror opposite to the first concave reflecting mirror, The wide-area illumination device according to any one of (1) to (16), wherein a flat mirror that reflects light from the LED light source toward the light irradiation side is extended at a front end portion of the reflection surface.

  According to this wide area illuminating device, the reflected light from the concave reflecting mirror and the direct light can be made more parallel and can reach farther. That is, the plane mirror receives light from the LED light source that has not been irradiated to the first concave reflecting mirror, and reflects the light by making it substantially parallel toward the light emitting side. Since the first concave reflecting mirror has a predetermined reflecting surface area, and the plane mirror has a predetermined reflecting surface area continuous with the reflecting surface area, the first concave reflecting mirror and the plane mirror are used. The reflected light becomes a large amount of parallel light and irradiates the far irradiation region.

  According to the wide area illumination device of the present invention, the first concave reflecting mirror that is disposed on the substrate on which the LED light source is mounted and reflects and emits the light from the LED light source, and the first concave reflecting mirror are disposed adjacent to the first concave reflecting mirror. The second concave reflector is inclined so that the height of the reflector on the first concave reflector side is high and the height of the reflector on the opposite side of the first concave reflector is low. Since the reflected light from the first concave reflecting mirror and the direct light irradiate far away, the reflected light from the second concave reflecting mirror also radiates far away, while from the second concave reflecting mirror. Direct light is diffused and irradiated in a direction orthogonal to the oblique cutting direction in the neighboring region. Thereby, highly efficient light distribution control with little energy loss can be performed, and illumination in a state in which the illuminance is kept uniform can be performed in a region from a distance to the vicinity.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a wide area illumination device according to the invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view of a wide area illumination device according to the present invention as viewed from the light emitting side, FIG. 2 is a view taken along the line AA in FIG. 1, and FIG. 3 is a perspective view of the wide area illumination device shown in FIG.
As shown in FIGS. 1 to 3, the wide area illumination device 100 according to the present embodiment has a single substrate 23 on which a plurality of LED light sources 21 are mounted, and a first LED light source on the substrate 23 at a bottom position. The first concave light reflecting mirror 25 for distant illumination that reflects the light from the first LED light source toward the illumination range, and the second LED light source adjacent to the first LED light source are disposed as the bottom position. And a second concave reflecting mirror 27 for near illumination that reflects light from the second LED light source toward the illumination range, and the second concave reflecting mirror 27 is on the first concave reflecting mirror 25 side. The reflector has a shape cut obliquely so that the height of the reflecting mirror from the surface of the substrate 23 is high and the height of the reflecting mirror on the side opposite to the first concave reflecting mirror 25 is low. With this configuration, it is possible to evenly irradiate a region from a distance to the vicinity.
A drive unit (not shown) is connected to each LED light source 21, and the drive unit supplies light emission drive power to the LED light source 21. As this driving unit, for example, a full range transformer or the like can be used. The drive unit is connected to a commercial power source, converts the power from the commercial power source into a direct current, alternating current, or pulsed drive voltage and supplies it to the LED light source 21. The brightness of the LED light source 21 is set by constant current driving.

  The multiple LED light sources 21 are linearly arranged along the first LED light source row and the second LED light source row on the substrate 23 which is a base. This substrate 23 is integrated with a reflector frame panel 29 formed by integrally forming a first concave reflecting mirror 25 for distant illumination and a second concave reflecting mirror 27 for near illumination by engaging means such as an engaging claw 31. Being attached to. As in this configuration, the multi-row LED light sources 21 are mounted on a single substrate, so that the optical positional accuracy of the LED light sources 21 is more accurate than in the case of mounting and combining on a plurality of substrates. Can be. In FIG. 2, 32 represents a transparent cover.

  The LED light source 21 includes a blue light emitting diode and a phosphor that converts blue light from the blue light emitting diode into yellow light. Thus, in the LED light source 21, when the blue light emitted from the blue light emitting diode is absorbed by the phosphor, the phosphor emits yellow light having a shorter wavelength, and the yellow light and the blue light that has not been absorbed. Are mixed, and the emitted light becomes white light. In addition to the above configuration, the configuration may include a phosphor that emits red light by receiving blue light from a blue light emitting diode and a phosphor that emits green light. Moreover, the structure which has the fluorescent substance which receives the ultraviolet light from an ultraviolet light emitting diode and light-emits red, green, and blue may be sufficient. The ultraviolet light emitting diode has a luminous efficiency approximately twice that of the blue light emitting diode, is economically superior, and can construct a lighting device with higher brightness.

  The first concave reflecting mirror 25 is formed with a plurality of reflecting surfaces (parabolic mirrors) 25a (a total of 17 in this embodiment) that are parabolic surfaces whose light emitting side is the releasing side. On the other hand, the second concave reflecting mirror 27 is formed with the same number of parabolic mirrors 27a obtained by excising a parabolic mirror 25a similar to the first concave reflecting mirror 25 at a predetermined inclination angle. As shown in FIG. 2, the second concave reflecting mirror 27 has a high reflecting mirror height h1 on the first concave reflecting mirror 25 side and a low reflecting mirror height h2 on the opposite side to the first concave reflecting mirror 25. It has the shape cut | disconnected diagonally. The cut surface may be linear or curved. Further, the second concave reflecting mirror may be formed of, for example, a transparent material without being “cut”, and a portion other than the reflecting mirror surface may be a transparent body.

FIG. 4 is an explanatory diagram showing the correlation between the cut shape of the concave reflecting mirror and the illuminance.
When the light emitting / opening surface A is perpendicular to the optical axis Ax, the concave reflecting mirror reflects light from the LED light source 21 to the parabolic mirror, and as shown in FIG. And is irradiated as substantially parallel light along the optical axis Ax. On the other hand, as the inclination angles of the oblique cut surfaces increase to θ1 and θ2, the side opening areas by the light emission opening surface B and the light emission opening surface C gradually increase. As a result, as shown in FIGS. 4B and 4C, the diffused light emitted from the LED light source 21 directly from the side open surface is increased without entering the parabolic mirror. It has become.

  In the first concave reflecting mirror 25 and the second concave reflecting mirror 27, the LED light source 21 is disposed at the focal position of the parabolic mirror 25a and the parabolic mirror 27a. By collimating the light from the LED light source 21 with the parabolic mirror 25a and the parabolic mirror 27a, the light can be collimated. In particular, the first concave reflecting mirror 25 can irradiate far away. This makes it possible to form a long band of light extending in the light irradiation direction (the direction from the near irradiation region to the far irradiation region).

FIG. 5 is an enlarged perspective view of the reflector frame panel.
The surface 29a of the reflector frame panel 29 that opens the concave portions of the first concave reflector 25 and the second concave reflector 27 is formed in a satin shape. The light reflected by the satin-like surface 29a is specularly reflected when viewed macroscopically, but diffused and reflected when viewed microscopically.

  By treating the surface of the reflector frame panel 29 with a satin finish, even if the light irradiated to the near wall surface or the like is returned to the wide area illumination device 100 by reflection, the reflector frame panel 29 Illumination unevenness (striped pattern) on the wall surface due to secondary reflection that is diffusely reflected by the matte surface 29a and easily occurs when the surface 29a is a mirror surface can be prevented.

  Examples of the coating surface to be applied to the reflecting surface of the parabolic mirror 25a include finishing by sputtering plating. The sputtering plating process consists of applying a base coat with a dedicated primer, vapor-depositing aluminum in a vacuum, and urethane clear coating on the aluminum vapor-deposited surface. Therefore, the coated surface of the reflector frame panel surface 29a can be formed into a satin finish after sputtering plating by making it a so-called rough finish.

  Further, it is desirable that the parabolic mirror 27a of the second concave reflecting mirror 27 is also formed in a satin shape. In particular, the parabolic mirror 27a of the second concave reflecting mirror 27 that illuminates the near field has a satin shape, so that the reflected light from the LED light source 21 is added in addition to the diffuse irradiation action by the inclined cut shape of the second concave reflecting mirror 27. Is further diffused by the satin-like parabolic mirror 27a, enabling more uniform illumination in the near field. That is, the diffusion effect is improved, and illumination with more uniform illuminance is possible.

  The wide area illumination device 100 includes a first concave reflecting mirror row 33 and a second concave reflecting mirror row 35 that are formed by arranging a plurality of first concave reflecting mirrors 25 or second concave reflecting mirrors 27 in a straight line. It is provided with any number of parallel columns. In the present embodiment, the first concave reflecting mirror row 33 and the second concave reflecting mirror row 35 are constituted by a total of two rows. By adopting such a multi-row configuration, the irradiable range is increased, and illumination over a wide area is possible. Further, when compared in the same irradiation region, it is possible to increase the illuminance when irradiation is performed with a large number of rows compared to when irradiation is performed with a small number of rows. Further, when the multiple rows are irradiated, the individual inclined slopes of the second concave reflecting mirror row 35 become gentler, so that the illumination light boundary connecting portion by each reflecting mirror row can be made less noticeable.

  Further, in the wide area illumination device 100, the first concave reflecting mirrors 25 arranged in the column direction are set so that the arrangement pitch P in the column direction is shorter than the maximum diameter distance D of the first concave reflecting mirror 25 in a plan view. Has been. With such a configuration, in the first concave reflecting mirror row 33, the separation distance between the parabolic mirrors 25a adjacent in the row direction is shortened, so that the shadow of light from the adjacent LED light sources 21 is reduced. The illuminance in the direction of the reflecting mirror in the far illumination area becomes more uniform. Furthermore, the lighting device itself can be reduced in size.

  Further, each reflection is performed on the reflecting surface of the first concave reflecting mirror 25 on the side opposite to the second concave reflecting mirror 27 and the reflecting surface on the opposite side of the second concave reflecting mirror 27 from the first concave reflecting mirror 25 side. A flat mirror 37 that reflects light from the LED light source 21 toward the light irradiation side is provided at the front end of the surface. By extending the plane mirror 37, the reflected light from the parabolic mirror 25a and the direct light from the LED light source 21 can be made more parallel and can reach farther. That is, the plane mirror 37 receives light from the LED light source 21 that has not been irradiated to the first concave reflecting mirror 25 and the second concave reflecting mirror 27, and reflects the light while condensing it toward the light emitting side. The first concave reflecting mirror 25 has a predetermined reflecting surface region, and the plane mirror 37 has a predetermined reflecting surface region continuous with the reflecting surface region. For this reason, the light reflected by the first concave reflecting mirror 25 and the plane mirror 37 is irradiated to the far irradiation region as parallel light with an increased amount of light. The same applies to the second concave reflecting mirror 27.

  The reflector frame panel 29 having the first concave reflector 25, the second concave reflector 27, and the plane mirror 37 is integrally formed of a resin material. This simplifies manufacturing and reduces costs. Further, the relative optical axis positions of the reflecting mirrors in the first concave reflecting mirror row 33 and the second concave reflecting mirror row 35 or the reflecting mirrors between the rows can be maintained with high accuracy. As a result, it is possible to stably manufacture a high-quality wide-area lighting device 100 that does not vary in illuminance.

FIG. 6 is an explanatory diagram showing light distribution patterns of the first concave reflecting mirror and the second concave reflecting mirror.
In the wide area illumination device 100 having the above-described configuration, the first concave reflecting mirror 25 whose reflecting surface is not cut is provided with a parabolic mirror 25a symmetrical to the optical axis Ax, as shown in FIG. Thus, the direct light from the LED light source 21 and the reflected light reflected by the reflecting surface become substantially parallel light and irradiate the far region. On the other hand, as shown in FIG. 6B, the second concave reflecting mirror 27 whose reflecting surface is cut is similar to the first concave reflecting mirror 25 on the reflecting surface on the first concave reflecting mirror 25 side with the optical axis Ax interposed therebetween. Is irradiated with substantially parallel light, and on the opposite side across the optical axis Ax, the reflective surface is inclined and cut away, so that the ratio of direct light from the LED light source 21 is gradually reduced while the reflected light is gradually reduced. Will be increased. In addition to this, diffuse reflected light from the satin is also irradiated from the excision part. As a result, according to the second concave reflecting mirror 27, the diffuse light quantity to the near side is ensured while maintaining the light quantity to the far side while fixing the global emission direction. Therefore, unlike the configuration in which diffused light is radiated evenly around, the energy loss of illumination can be suppressed.

FIG. 7 is a side view showing an illumination area of the wide area illumination device when used as wall illumination, and FIG. 8 is a front view of the illumination area formed on the wall surface of FIG.
The wide area illumination device 100 is used as wall illumination, for example, so that the distant region E1 is irradiated with the irradiation light that has become substantially parallel light by the first concave reflecting mirror 25, and the ratio of direct light by the second concave reflecting mirror 27 is increased. The neighboring region E2 is irradiated with the gradually increased diffuse reflection light. The boundary region E3 between the far region E1 and the nearby region E2 is connected without a step difference in illuminance. As a result, as shown in FIG. 8, illumination in a state in which the illuminance is kept uniform can be performed for the region E from the distant to the vicinity.

FIG. 9 is a side view of a dome-shaped ceiling in which the wide area illumination device shown in FIG. 1 is used.
The wide area illumination device 100 can also be suitably used when illuminating the dome-shaped ceiling surface 39 with uniform illuminance. In the case of the dome-shaped ceiling surface 39, as shown in the drawing, a plurality of wide area lighting devices 100 are installed at the peripheral edge of the dome. Each wide-area illumination device 100 includes a first concave reflecting mirror 25 that irradiates the vicinity of the ceiling (distant area E1), and a second concave reflection that is disposed on the outer side (center side of the dome) and irradiates the side wall surface (near area E2). And a mirror 27. Thereby, without adding a lighting device to the middle part of the curved ceiling surface or adding a lighting device that irradiates illumination light from the middle part of the curved ceiling surface, the wide-area lighting device 100 arranged only at both ends in the diameter direction, It becomes possible to illuminate the dome-shaped ceiling surface 39 with uniform illuminance.

  As described above, according to the wide area illumination device 100 configured as described above, the first concave reflecting mirror 25 that is disposed on the substrate 23 on which the LED light source 21 is mounted and reflects and emits the light from the LED light source 21, and the first And a second concave reflecting mirror 27 disposed adjacent to the concave reflecting mirror 25. The second concave reflecting mirror 27 has a high reflecting mirror height h1 on the first concave reflecting mirror 25 side, and the first concave reflecting mirror. Since the reflecting mirror height h2 on the side opposite to that of the mirror 25 is obliquely cut so that the reflected light and the direct light from the first concave reflecting mirror 25 irradiate the far region E1, the second concave reflecting Reflected light from the mirror 27 also irradiates the far region E1, while direct light from the second concave reflecting mirror 27 is diffused and irradiated in a direction perpendicular to the oblique cutting direction in the near region E2. As a result, highly efficient light distribution control with little energy loss that does not pass through the louver or lens can be performed, and illumination in a state in which the illuminance is kept uniform can be performed for the region E from the distant to the vicinity. .

FIG. 10 is a plan view of Modification 1 in which a first concave reflecting mirror and a second concave reflecting mirror array are arranged in a staggered manner.
The first concave reflecting mirror 25 and the second concave reflecting mirror 27 may be staggered. According to the configuration of the staggered arrangement, the parabolic mirror 27a of the second concave reflecting mirror row 35 is disposed close to between the parabolic mirrors 25a of the first concave reflecting mirror row 33, The separation distance L between the mirror rows is shortened, the light source density of the wide area illumination device 100 can be improved, and the size can be reduced.

Next, a second embodiment of the wide area illumination device according to the present invention will be described.
FIG. 11 is a cross-sectional view of a wide area illumination device according to the second embodiment in which a plurality of mirror rows are provided, and FIG. 12 is an electric system block including a light amount control unit connected to the wide area illumination device shown in FIG. FIG. 13 and FIG. 13 are circuit diagrams as an example of a drive unit controlled by the light amount control means.
In the wide area illumination device 200 according to this embodiment, each row of LED light sources corresponding to one row of first concave reflecting mirrors 25 and the other two rows of second concave reflecting mirrors 27A and 27B is independent of each other. It is connected to a controllable light amount control means (control unit) 41.

  The control unit 41 is connected to the DC power supply unit 43, and reads control data from the illumination pattern storage unit 45, thereby driving units 47a corresponding to the first concave reflecting mirror 25 and the second concave reflecting mirrors 27A and 27B, respectively. , 47b, 47c, drive control signals are sent.

  The drive units 47a, 47b, 47c are configured as a constant current pulse width control drive circuit of the LED light source 21. As shown in FIG. 13, for example, in the drive unit 47a, 51 and 53 are resistors, 55 and 57 are transistors, 59 is a Zener diode, and 61 is a pulse generation circuit. In FIG. 13, the drive section 47c and the subsequent sections are the same as the drive sections 47a and 47b, and thus description thereof is omitted.

In the drive unit 47 a, constant current circuits 63 and 63 including resistors 51 and 53, a transistor 55, and a Zener diode 59 are connected to the DC light source unit 43 in series with the LED light source 21 to cause the LED light source 21 to emit light. The base voltage of the transistor 55 is clamped to the Zener voltage of the Zener diode 59. When the Zener voltage is V _z and the base-emitter voltage of the transistor 59 is V _be , the voltage of the resistor 51 is V _z −V _be , and the resistor 51 Is given by (V _z −V _be ) / R 4, where R 4 is the resistance value of the resistor 51. If the zener voltage V _z and the base-emitter voltage V _be are constant, the current of the resistor 51 becomes (V _z −V _be ) / R4 and becomes constant. That is, even if the DC voltage V ₀ or the voltage drop of the LED light source 21 changes, the collector-emitter voltage of the transistor 55 changes so that the current of the LED light source 21 becomes constant.

  A transistor 57 is connected in parallel with the Zener diode 59, and a pulse generator 61 is connected to the base of the transistor 57. When the transistor 57 is turned on by the pulse voltage from the pulse generator 61, the Zener diode 59 is short-circuited, so that the base current of the transistor 55 is 0 and the transistor 55 is turned off. That is, since the current of the LED light source 21 is cut off, it is turned off. When the pulse voltage from the pulse generator 61 disappears, the transistor 57 is turned off, so that a current flows through the base of the transistor 55, and the constant current circuit 63 supplies a constant current to the LED light source 21 to turn on the LED light source 21. Here, the luminance of the LED light source 21 is adjusted without changing the drive current by controlling the ratio of the time with and without the pulse voltage from the pulse generator 61, that is, by controlling the pulse width. be able to.

  Since the voltage drop of the LED light source 21 cannot be expected when the transistor 55 is turned off, the power supply voltage is applied to the transistor 55. When the power supply voltage is 140V, the withstand voltage of the transistor 55 needs to be 200V or more.

  In the wide area illumination device 200, the control unit 41 appropriately controls increase / decrease of the light amount of the LED light source 21 in each mirror array, so that the joint (border) of illumination from the near irradiation region to the far irradiation region can be set as continuous illuminance. It is possible to prevent illuminance unevenness due to illuminance steps. Thereby, it can prevent reliably that the line resulting from an illuminance difference arises in a boundary. The above-described light amount control of the LED light source 21 can be similarly applied to the wide area illumination device 100 of the first embodiment having the above-described two-row configuration.

FIG. 14 is a schematic diagram showing a gradation illumination area illuminated by the wide area illumination device shown in FIG.
By setting the LED light source 21 columns corresponding to the first concave reflecting mirror 25 and the second concave reflecting mirrors 27A and 27B at different illuminances for each column, as shown in FIG. Gradation illumination 65 in which the illuminance of the illumination light gradually changes is possible. For example, in the case of wall illumination, aesthetically excellent illumination light can be obtained by forming a gradation in which the vicinity of the ceiling is bright and the illuminance gradually decreases toward the floor.

  Further, each LED light source 21 row corresponding to the first concave reflecting mirror 25 and the second concave reflecting mirror 27A, 27B has different illuminance (bright / dark / bright, dark / bright / dark, etc.) for each row. It may be changed in series. In this case, depending on the position of the object to be illuminated, the illuminance can be arbitrarily set to be darker or darker, and by changing the illuminance, it is possible to contribute to mood creation in the illumination space. . Furthermore, when there is a change such as an object to be illuminated automatically switched, illumination with illuminance corresponding to the type of the object to be illuminated can be easily performed.

FIG. 15 is a schematic diagram showing different color illumination areas illuminated by the wide area illumination device shown in FIG.
Further, the wide-area illumination device 200 may control the LED light sources 21 corresponding to the first concave reflecting mirror 25 and the second concave reflecting mirrors 27A and 27B by the control unit 41 so that the colors are different for each column. . As a result, it is possible to form the multicolor illumination areas C1, C2, and C3 in which the color of the illumination light changes from the near area E2 to the far area E1, and an aesthetically excellent multicolor display or the like becomes possible. In this case, the boundary between the color illumination areas C1, C2, and C3 is mixed and the color continuously changes.
In either case, when an object to be illuminated exists from the vicinity to the distance, the single wide area illumination device 200 can illuminate both the distance and the near area at the same time and with a visual effect.

FIG. 16 is an explanatory diagram of Modification 2 in which a concave reflecting mirror is provided with a plurality of LED light sources.
In the wide area illumination device according to this modification, a plurality of LED light sources 21 are arranged in blocks at the paraboloid focal positions of the first concave reflecting mirror 25 and the second concave reflecting mirror 27, respectively. For example, a total of nine LED light sources 21, for example, three vertically and three horizontally, are mounted on the substrate 23 in the block. That is, it is set as the structure which provided the some LED light source 21 with respect to one reflective mirror. In this example, the first concave reflecting mirror 25 and the second concave reflecting mirror 27 have a single configuration, but the present invention is not limited to this, and a plurality of reflecting mirrors may be arranged. Further, in this configuration, basically, the control is performed so that all the LED light sources 21 are turned on simultaneously, but it is also possible to perform control for changing the illuminance in each block. Alternatively, each LED light source 21 may be controlled to emit light independently. In that case, gradation can be set finely, and if a light source of a plurality of emission colors is used for each LED light source 21, multicolor illumination light can be set finely. Furthermore, by arranging a plurality of the wide area illumination devices, each having a single reflecting surface configuration of the first concave reflecting mirror 25 and the second concave reflecting mirror 27, in the direction from the near irradiation region to the far irradiation region. In addition to gradation and multi-color change, gradation and multi-color change are also possible in the direction along the row direction of the individual reflectors (the width direction of the device, that is, the width direction of the belt-like irradiation area extending in the perspective direction). Become.

FIG. 17 is a cross-sectional view of Modification 3 in which the optical axis of the second concave reflecting mirror is inclined with respect to the first concave reflecting mirror.
The optical axis Ax1 of the second concave reflecting mirror 27 in this modification is inclined by a predetermined angle θ with respect to the optical axis Ax2 of the first concave reflecting mirror 25. For example, if the optical axis Ax2 of the second concave reflecting mirror 27 is inclined to the vicinity irradiation area, the vicinity irradiation area can be illuminated with higher illuminance. Further, if the optical axis Ax2 of the second concave reflecting mirror 27 is inclined to the far irradiation area, the far area can be illuminated with higher illuminance, and the near irradiation area can be illuminated with low illuminance. Even in this case, there is no illuminance step at the boundary between the distant and the neighboring areas. That is, a gentle and large illuminance difference can be obtained from the far irradiation area to the near irradiation area by illumination without a step.

FIG. 18 is a cross-sectional view of Modification 4 in which warped portions that reflect toward the nearest region are provided at the ends of the first concave reflecting mirror and the second concave reflecting mirror.
In the first concave reflecting mirror 25, the outer height h3 on the opposite side to the second concave reflecting mirror 27 side is the maximum height, and the inner height h4 on the second concave reflecting mirror 27 side is lower than the outer height h3. Is formed. The second concave reflecting mirror 27 is formed such that the inner height h4 on the first concave reflecting mirror 25 side is higher than the outer height h5 on the opposite side, and has a relationship of h3>h4> h5.

  Further, the outer front end portion of the first concave reflecting mirror 25 and the inner front end portion of the second concave reflecting mirror 27 are warped portions as side reflecting function portions having heights Ha and Hb that are reflected toward the nearest region. 25b and 27b are formed. The curved portions 25ba and 27b are overhang-shaped curved surfaces (or may be flat surfaces) deviating from the parabolic curves of the concave reflecting mirrors, and warp inside the concave reflecting mirrors. The reflection surfaces of the warped portions 25b and 27b are made into a satin finish. The warped portions 25b and 27b are formed in the range of the widths Ha and Hb from the tip of the reflecting mirror, and the range is arbitrarily set according to the amount of light reflected to the nearest region.

When light emitted from the LED light source 21 is incident on the warp portion 25b, the reflected light L _A from the warp portion 25b is recently grazing second concave reflecting mirror 27 which is formed lower height irradiating near region. Similarly, the reflected light L _B from the warp portion 27b, is recently brushed reflector height h5 irradiating near region.

Thereby, it is possible to illuminate the nearest region E4 located nearer than the neighborhood region E2 shown in FIG. 7 with illumination light, and the illumination range can be set to a wider range. Moreover, since illumination light can be reliably applied toward the nearest region, it is not necessary to install the wide area illumination device near the wall surface, and it is possible to install the wide area illumination device at a position separated from the wall surface. For this reason, the degree of freedom of installation is improved, and a distant place can be illuminated with sufficient illuminance.
And the illumination intensity of the nearest field E4 can be adjusted by changing suitably the shape and surface treatment of the curvature parts 25b and 27b, and also the illumination intensity of the boundary E3 between the far field E1 and the neighborhood field E2 is also adjusted. be able to.

It should be noted that the warped portions 25b and 27b may be provided only in one of them, or the regions of heights H _A and H _B may be simply formed in a satin shape with a paraboloid. In either case, the diffused light hits the nearest region, and the same effect as described above can be obtained.

  The wide-area illumination device described above is not limited to being arranged in a single row as described above, and as shown in FIG. Good. In this case, each of the back-to-back wide area illumination devices is configured as one unit and disposed at a desired installation location, so that illumination can be performed with a uniform illuminance over a wide range from a distance to the vicinity. The illustrated example is merely an example, and the number and orientation of the lighting devices to be combined can be arbitrarily set according to the environmental conditions of lighting.

Furthermore, in the wide area illumination device according to the present invention, it is desirable to change the surface properties of the first concave reflecting mirror 25 and the second concave reflecting mirror 27 in accordance with the type of the LED light source.
When the LED light source is a combination of a blue light emitting diode and a yellow light emitting phosphor, and a combination of a blue light emitting diode and a red / green light emitting phosphor, the first concave reflecting mirror 25 and the second concave reflecting mirror 27 are provided. It is preferable to make the surface a satin finish, and thereby, it is possible to secure an illuminance of 4 times or more as compared with the illuminance of the LED light source alone (no reflector).
On the other hand, when the LED light source is a combination of an ultraviolet light emitting diode and a red / green / blue light emitting phosphor, the surface of the first concave reflecting mirror 25 is mirror-finished and the surface of the second concave reflecting mirror 27 is matte. It is preferable. Thereby, the illuminance is increased by about 20 times by the first concave reflecting mirror 25 in particular, and color unevenness does not occur in the emitted illumination light.

FIG. 1 is a plan view of a wide area illumination device according to the present invention as seen from the light exit side. It is an AA arrow line view of FIG. It is a perspective view of the wide area illuminating device shown in FIG. It is explanatory drawing showing the correlation with the cut shape of a concave reflective mirror, and illumination intensity. It is an expansion perspective view of a reflector frame panel. It is explanatory drawing showing the light distribution pattern of the 1st concave reflecting mirror and the 2nd concave reflecting mirror. It is a side view showing the illumination area of the wide-area illumination device when used as wall illumination. It is a front view of the illumination area | region formed in the wall surface of FIG. It is a side view of the dome shaped ceiling in which the wide area illuminating device shown in FIG. 1 was used. It is a top view of the modification 1 with which the 1st concave reflecting mirror and the 2nd concave reflecting mirror row | line | column are arrange | positioned in zigzag. It is sectional drawing of the wide area illuminating device by 2nd Embodiment in which the reflective mirror row | line | column was provided with two or more rows. It is a block diagram of an electric system including the light quantity control means connected to the wide area illumination device shown in FIG. It is a circuit diagram of the drive part controlled by a light quantity control means. It is a schematic diagram showing the gradation illumination area | region illuminated with the wide area illuminating device shown in FIG. It is a schematic diagram showing the different color illumination area illuminated with the wide area illuminating device shown in FIG. It is explanatory drawing of the modification 2 provided with the several LED light source in the concave reflecting mirror. It is sectional drawing of the modification 3 which inclined the optical axis of the 2nd concave reflective mirror with respect to the 1st concave reflective mirror. It is sectional drawing of the modification 4 which provided the curvature part which reflects toward the nearest region in the edge part of a 1st concave reflective mirror and a 2nd concave reflective mirror. It is a schematic diagram which shows the structural example arrange | positioned combining in parallel by making the 1st concave reflective mirror side back-to-back. It is a schematic diagram of the conventional illuminating device.

Explanation of symbols

21 LED light source 23 substrate 25 first concave reflecting mirror 25a, 27a parabolic mirror 27 second concave reflecting mirror 29 reflecting mirror frame panel 33 first concave reflecting mirror array 35 second concave reflecting mirror array 37 plane mirror 41 control unit (light quantity) Control means)
100,200 Wide-area illumination device Ax1 Optical axis of the first concave reflecting mirror Ax2 Optical axis of the second concave reflecting mirror D Diameter distance h1 Reflector height on the first concave reflecting mirror side h2 Reflection on the opposite side of the first concave reflecting mirror Mirror height P Arrangement pitch in the row direction

The above object of the present invention is achieved by the following configuration.
(1) A wide-area lighting device having an irradiation range from a far field to a nearby area,
A substrate on which a plurality of LED light sources are mounted;
A first concave light reflector for distant illumination that is disposed with the first LED light source on the substrate as a bottom position and reflects light from the first LED light source toward the illumination range;
A second concave light reflecting mirror for proximity illumination that is arranged with the second LED light source adjacent to the first LED light source as a bottom position and reflects light from the second LED light source toward the illumination range; With
A first concave reflecting mirror array in which a plurality of first concave reflecting mirrors are arranged in a straight line and a second concave reflecting mirror array in which a plurality of second concave reflecting mirrors are arranged in a straight line are provided in parallel to each other. And
Each first concave reflecting mirror arranged in the first concave reflecting mirror row has an arrangement pitch in the row direction set shorter than the maximum diameter distance of the circular shape in plan view of the first concave reflecting mirror. The part where the concave surfaces of the concave mirrors overlap is the end edge,
The second concave reflecting mirror is inclined so that the reflecting mirror height from the substrate surface on the first concave reflecting mirror side is high and the reflecting mirror height on the side opposite to the first concave reflecting mirror is low. A wide area lighting device characterized by having a cut shape.

According to this wide area illumination device, the first concave reflecting mirror that is not cut by the reflecting mirror has a reflecting surface that is symmetrical with respect to the optical axis, and direct light from the LED light source and reflected light reflected by the reflecting surface are generated. It becomes a substantially parallel light and is irradiated to a distant area. On the other hand, the second concave reflecting mirror whose cut surface has been cut sandwiches the optical axis, and the reflecting surface on the first concave reflecting mirror side is irradiated with substantially parallel light in the same manner as the first concave reflecting mirror. On the side (outside), the reflective surface is cut off with an inclination, so that the ratio of direct light from the LED light source is gradually increased while the reflected light traveling toward the front is gradually reduced, and the diffuse illumination effect on the neighboring area Will increase.
Further, by providing a plurality of rows of the first concave reflecting mirror and the second concave reflecting mirror in parallel with each other, the irradiable range is increased, and a wide area illumination is possible. In addition, when compared in the same irradiation region, the illuminance can be increased when irradiation is performed with a large number of rows compared to when irradiation is performed with a small number of rows. Furthermore, since the individual cutting inclination gradients of the second concave reflecting mirror rows become gentler when irradiation is performed in multiple rows, the illumination light boundary connection portions by the respective reflecting mirror rows can be made less noticeable.
In addition, since the separation distance between the reflecting mirrors adjacent in the row direction in the first concave reflecting mirror row is shortened, the shadow of the light from the adjacent LED light source is reduced, and the illuminance in the reflecting mirror row direction in the far illumination area is further increased. It becomes uniform.

( 2 ) The wide-area illumination device according to ( 1 ), wherein the first concave reflecting mirror and the second concave reflecting mirror are arranged in a staggered manner.

( 3 ) The first concave reflecting mirror and the second concave reflecting mirror are held by a frame panel, and the light irradiation side surface of the frame panel is formed in a satin finish (1) or (2) The wide area illumination device according to the description.

( 4 ) The wide area illumination device according to any one of (1) to ( 3 ), wherein the first concave reflecting mirror has a reflecting surface formed in a satin shape.

( 5 ) The wide area illumination device according to any one of (1) to ( 4 ), wherein the second concave reflecting mirror has a reflecting surface formed in a satin shape.

( 6 ) The reflecting surfaces of the first concave reflecting mirror and the second concave reflecting mirror are formed as paraboloids, and the LED light source is disposed at a focal position of the paraboloid (1). The wide-area lighting device according to any one of to ( 5 ).

(7) Each LED light source corresponding to the first concave reflecting mirror columns and the second concave reflecting mirror columns, characterized in that connected to the light intensity controllable light quantity control means independently for each column (1 )-( 6 ) Any one of the wide area illuminating device.

( 8 ) Each of the LED light sources corresponding to the first concave reflecting mirror row and the second concave reflecting mirror row includes one having a different color for each row, ( 1 ) to ( 7 ) The wide-area lighting device according to 1.

( 9 ) A plurality of the LED light sources are disposed in one reflecting mirror with respect to at least one of the first concave reflecting mirror and the second concave reflecting mirror. ( 8 ) The wide-area illumination device according to any one of ( 8 ).

( 10 ) The wide area illumination device according to any one of (1) to ( 9 ), wherein the first concave reflecting mirror and the second concave reflecting mirror are integrally formed of a resin material.

( 11 ) The optical axis of the second concave reflecting mirror in front is inclined with respect to the optical axis of the first concave reflecting mirror, according to any one of (1) to ( 10 ). Wide area lighting device.

( 12 ) At least one of the reflecting surface tip of the first concave reflecting mirror opposite to the second concave reflecting mirror and the reflecting surface tip of the second concave reflecting mirror on the first concave reflecting mirror side. On the other hand, (1) to ( 11 ) are characterized in that a side reflection function part for reflecting light from the LED light source is provided along a direction from the first concave reflecting mirror toward the second concave reflecting mirror. The wide-area illumination device according to any one of the above.

( 13 ) The wide-area illuminating device according to ( 12 ) , wherein the side reflecting functional unit has a warped portion that warps from the reflecting surfaces of the first and second concave reflecting mirrors to the inside of each concave reflecting mirror. .

( 14 ) The wide-area illumination device according to ( 13 ), wherein the reflective surface of the warped portion is formed in a satin finish .

( 15 ) With respect to the reflecting surface on the opposite side of the first concave reflecting mirror from the second concave reflecting mirror, and the reflecting surface on the opposite side of the second concave reflecting mirror from the first concave reflecting mirror side, The wide-area illumination device according to any one of (1) to ( 14 ), wherein a flat mirror that reflects light from the LED light source toward the light irradiation side is extended at a front end portion of the reflection surface.

According to the wide area illumination device of the present invention, the first concave reflecting mirror that is disposed on the substrate on which the LED light source is mounted and reflects and emits the light from the LED light source, and the first concave reflecting mirror are disposed adjacent to the first concave reflecting mirror. The second concave reflector is inclined so that the height of the reflector on the first concave reflector side is high and the height of the reflector on the opposite side of the first concave reflector is low. Since the reflected light from the first concave reflecting mirror and the direct light irradiate far away, the reflected light from the second concave reflecting mirror also radiates far away, while from the second concave reflecting mirror. Direct light is diffused and irradiated in a direction orthogonal to the oblique cutting direction in the neighboring region. And since the separation distance between the adjacent mirrors in the column direction in the first concave reflecting mirror row becomes shorter, the shadow of the light from the adjacent LED light source becomes smaller, and the illuminance in the direction of the reflecting mirror in the far illumination region becomes more It becomes uniform. Thereby, highly efficient light distribution control with little energy loss can be performed, and illumination in a state in which the illuminance is kept uniform can be performed in a region from a distance to the vicinity.

The above object of the present invention is achieved by the following configuration.
(1) A wide-area lighting device for wall lighting in which an area from far to near is an irradiation range,
A substrate on which a plurality of LED light sources are mounted;
A first concave light reflector for distant illumination that is disposed with the first LED light source on the substrate as a bottom position and reflects light from the first LED light source toward the far illumination range;
A second concave light reflector for near illumination that is arranged with the second LED light source adjacent to the first LED light source as a bottom position and reflects light from the second LED light source toward the illumination range in the vicinity. And comprising
A first concave reflecting mirror array in which a plurality of first concave reflecting mirrors are arranged in a straight line and a second concave reflecting mirror array in which a plurality of second concave reflecting mirrors are arranged in a straight line are provided in parallel to each other. And
Each first concave reflecting mirror arranged in the first concave reflecting mirror row has an arrangement pitch in the row direction set shorter than the maximum diameter distance of the circular shape in plan view of the first concave reflecting mirror. The part where the concave surfaces of the concave mirrors overlap is the end edge,
The second concave reflecting mirror is inclined so that the reflecting mirror height from the substrate surface on the first concave reflecting mirror side is high and the reflecting mirror height on the side opposite to the first concave reflecting mirror is low. Having a cut shape ,
The wide area illumination device, wherein the second concave reflecting mirror array and the first concave reflecting mirror array are arranged on the wall surface in this order from the wall surface side .
(2) A wide-area illumination device for dome-shaped ceiling surface illumination with an irradiation range from a distance to the vicinity,
A substrate on which a plurality of LED light sources are mounted;
A first concave light reflector for distant illumination that is disposed with the first LED light source on the substrate as a bottom position and reflects light from the first LED light source toward the far illumination range;
A second concave light reflector for near illumination that is arranged with the second LED light source adjacent to the first LED light source as a bottom position and reflects light from the second LED light source toward the illumination range in the vicinity. And comprising
A first concave reflecting mirror array in which a plurality of first concave reflecting mirrors are arranged in a straight line and a second concave reflecting mirror array in which a plurality of second concave reflecting mirrors are arranged in a straight line are provided in parallel to each other. And
Each first concave reflecting mirror arranged in the first concave reflecting mirror row has an arrangement pitch in the row direction set shorter than the maximum diameter distance of the circular shape in plan view of the first concave reflecting mirror. The part where the concave surfaces of the concave mirrors overlap is the end edge,
The second concave reflecting mirror is inclined so that the reflecting mirror height from the substrate surface on the first concave reflecting mirror side is high and the reflecting mirror height on the side opposite to the first concave reflecting mirror is low. Having a cut shape ,
The wide area illumination device, wherein the second concave reflecting mirror array and the first concave reflecting mirror array are arranged in this order from the peripheral end side to the peripheral end of the dome .

According to this wide area illumination device, the first concave reflecting mirror that is not cut by the reflecting mirror has a reflecting surface that is symmetrical with respect to the optical axis, and direct light from the LED light source and reflected light reflected by the reflecting surface are generated. It becomes a substantially parallel light and is irradiated to a distant area. On the other hand, the second concave reflecting mirror whose cut surface has been cut sandwiches the optical axis, and the reflecting surface on the first concave reflecting mirror side is irradiated with substantially parallel light in the same manner as the first concave reflecting mirror. On the side (outside), the reflective surface is cut off with an inclination, so that the ratio of direct light from the LED light source is gradually increased while the reflected light traveling toward the front is gradually reduced, and the diffuse illumination effect on the neighboring area Will increase.
Further, by providing a plurality of rows of the first concave reflecting mirror and the second concave reflecting mirror in parallel with each other, the irradiable range is increased, and a wide area illumination is possible. In addition, when compared in the same irradiation region, the illuminance can be increased when irradiation is performed with a large number of rows compared to when irradiation is performed with a small number of rows. Furthermore, since the individual cutting inclination gradients of the second concave reflecting mirror rows become gentler when irradiation is performed in multiple rows, the illumination light boundary connection portions by the respective reflecting mirror rows can be made less noticeable.
In addition, since the separation distance between the reflecting mirrors adjacent in the row direction in the first concave reflecting mirror row is shortened, the shadow of the light from the adjacent LED light source is reduced, and the illuminance in the reflecting mirror row direction in the far illumination area is further increased. It becomes uniform.

( 3 ) The wide area illumination device according to (1) or (2 ), wherein the first concave reflecting mirror and the second concave reflecting mirror are arranged in a staggered manner.

(4) the first concave reflecting mirror and the second concave reflecting mirror is held in the frame panel, the surface of the light irradiation side of the frame panel is characterized in that it is formed in a textured (1) - The wide-area lighting device according to any one of (3) .

( 5 ) The wide-area illumination device according to any one of (1) to ( 4 ), wherein the first concave reflecting mirror has a reflecting surface formed in a satin shape.

( 6 ) The wide area illumination device according to any one of (1) to ( 5 ), wherein the second concave reflecting mirror has a reflecting surface formed in a satin shape.

( 7 ) The reflecting surfaces of the first concave reflecting mirror and the second concave reflecting mirror are formed as paraboloids, and the LED light source is disposed at a focal position of the paraboloid (1). The wide-area lighting device according to any one of to ( 6 ).

( 8 ) The LED light sources corresponding to the first concave reflecting mirror row and the second concave reflecting mirror row are connected to a light amount control means capable of independently controlling the light amount for each row (1) )-( 7 ) The wide area illuminating device of any one of ( 7 ).

( 9 ) Any one of (1) to ( 8 ), wherein each LED light source corresponding to the first concave reflecting mirror row and the second concave reflecting mirror row includes a different color for each row. The wide-area lighting device according to 1.

( 10 ) The plurality of LED light sources are arranged in one reflecting mirror with respect to at least one of the first concave reflecting mirror and the second concave reflecting mirror. ( 9 ) The wide-area illumination device according to any one of ( 9 ).

( 11 ) The wide area illumination device according to any one of (1) to ( 10 ), wherein the first concave reflecting mirror and the second concave reflecting mirror are integrally formed of a resin material.

( 12 ) The optical axis of the second concave reflecting mirror in front is inclined with respect to the optical axis of the first concave reflecting mirror, according to any one of (1) to ( 11 ). Wide area lighting device.

( 13 ) At least one of the tip of the reflecting surface on the side opposite to the second concave reflecting mirror of the first concave reflecting mirror and the tip of the reflecting surface on the first concave reflecting mirror side of the second concave reflecting mirror. On the other hand, (1)-( 12 ) provided with the side reflection function part which reflects the light from the said LED light source along the direction which went to said 2nd concave reflecting mirror from said 1st concave reflecting mirror. The wide-area illumination device according to any one of the above.

( 14 ) The wide-area illuminating device according to ( 13 ), wherein the side reflecting functional unit has a warped portion that warps from the reflecting surfaces of the first and second concave reflecting mirrors to the inside of each concave reflecting mirror. .

( 15 ) The wide-area illumination device according to ( 14 ), wherein the reflective surface of the warped portion is formed in a satin finish.

( 16 ) For the reflecting surface of the first concave reflecting mirror opposite to the second concave reflecting mirror and the reflecting surface of the second concave reflecting mirror opposite to the first concave reflecting mirror, The wide-area illumination device according to any one of (1) to ( 15 ), wherein a flat mirror that reflects light from the LED light source toward the light irradiation side is extended at a front end portion of the reflection surface.

According to the wide area illumination device of the present invention, the first concave reflecting mirror that is disposed on the substrate on which the LED light source is mounted and reflects and emits the light from the LED light source, and the first concave reflecting mirror are disposed adjacent to the first concave reflecting mirror. The second concave reflector is inclined so that the height of the reflector on the first concave reflector side is high and the height of the reflector on the opposite side of the first concave reflector is low. Since the reflected light from the first concave reflecting mirror and the direct light irradiate far away, the reflected light from the second concave reflecting mirror also radiates far away, while from the second concave reflecting mirror. Direct light is diffused and irradiated in a direction orthogonal to the oblique cutting direction in the neighboring region. And since the separation distance between the adjacent mirrors in the column direction in the first concave reflecting mirror row becomes shorter, the shadow of the light from the adjacent LED light source becomes smaller, and the illuminance in the direction of the reflecting mirror in the far illumination region becomes more It becomes uniform. Thereby, highly efficient light distribution control with little energy loss can be performed, and illumination in a state in which the illuminance is kept uniform can be performed on the region of the wall surface and the dome-shaped ceiling surface from the distant to the vicinity.

Claims (17)

It is a wide area illumination device having an irradiation range from a distant area to a nearby area,
A substrate on which a plurality of LED light sources are mounted;
A first concave light reflector for distant illumination that is disposed with the first LED light source on the substrate as a bottom position and reflects light from the first LED light source toward the illumination range;
A second concave light reflecting mirror for proximity illumination that is arranged with the second LED light source adjacent to the first LED light source as a bottom position and reflects light from the second LED light source toward the illumination range; With
The second concave reflecting mirror is inclined so that the reflecting mirror height from the substrate surface on the first concave reflecting mirror side is high and the reflecting mirror height on the side opposite to the first concave reflecting mirror is low. A wide area lighting device characterized by having a cut shape.   A plurality of first concave reflecting mirror rows and second concave reflecting mirror rows each having a plurality of first concave reflecting mirrors and second concave reflecting mirrors arranged in a straight line are provided in parallel to each other. The wide area illumination device according to claim 1.   3. The wide area illumination device according to claim 2, wherein the first concave reflecting mirror and the second concave reflecting mirror are arranged in a staggered manner.   Each of the first concave reflecting mirrors arranged in the first concave reflecting mirror row has an arrangement pitch in the row direction set to be shorter than a maximum diameter distance in a circular shape in plan view of the first concave reflecting mirror. The wide area illumination device according to claim 2 or claim 3.   5. The first concave reflecting mirror and the second concave reflecting mirror are held by a frame panel, and the light irradiation side surface of the frame panel is formed in a satin shape. The wide-area illumination device according to any one of the above.   The wide-area illumination device according to claim 1, wherein the first concave reflecting mirror has a reflecting surface formed in a satin shape.   The wide-area illumination device according to claim 1, wherein the second concave reflecting mirror has a reflecting surface formed in a satin shape.   The reflecting surfaces of the first concave reflecting mirror and the second concave reflecting mirror are formed as paraboloids, and the LED light source is disposed at a focal position of the paraboloid. The wide-area lighting device according to any one of 7.   The LED light sources corresponding to the first concave reflecting mirror row and the second concave reflecting mirror row are connected to a light amount control means capable of independently controlling the light amount for each row. Item 9. The wide area illumination device according to any one of Items 8 to 9.   10. The LED light source corresponding to the first concave reflecting mirror row and the second concave reflecting mirror row includes one having a different color for each row. 10. Wide area lighting device.   11. The plurality of LED light sources are disposed in one reflecting mirror with respect to at least one of the first concave reflecting mirror and the second concave reflecting mirror. The wide-area illumination device according to any one of the above.   The wide area illumination device according to any one of claims 1 to 11, wherein the first concave reflecting mirror and the second concave reflecting mirror are integrally formed of a resin material.   The wide-area illumination device according to any one of claims 1 to 12, wherein an optical axis of the second concave reflecting mirror is inclined with respect to an optical axis of the first concave reflecting mirror.   With respect to at least one of the reflecting surface tip of the first concave reflecting mirror on the side opposite to the second concave reflecting mirror and the reflecting surface tip of the second concave reflecting mirror on the first concave reflecting mirror side, The side reflection function part which reflects the light from the said LED light source along the direction which went to the said 2nd concave reflective mirror from the 1st concave reflective mirror was provided, The any of Claims 1-13 characterized by the above-mentioned. The wide-area lighting device according to claim 1.   15. The wide-area illumination device according to claim 14, wherein the side reflection function unit has a shape that warps from the reflecting surface of the concave reflecting mirror to the inside of the concave reflecting mirror.   The wide-area illumination device according to claim 14, wherein the side reflection function unit is formed by forming a reflective surface of the concave reflecting mirror in a satin finish.   The tip of each reflecting surface with respect to the reflecting surface of the first concave reflecting mirror opposite to the second concave reflecting mirror and the reflecting surface of the second concave reflecting mirror opposite to the first concave reflecting mirror side The wide area illuminating device according to any one of claims 1 to 16, wherein a flat mirror that reflects light from the LED light source toward a light irradiation side is extended in a part.

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