JP5175170B2 - Lighting device and lighting method - Google Patents

Description

  The present invention provides a situation closer to a natural light environment by forming a plurality of illumination areas in order to reproduce a natural light environment within the viewing angle range of the user and controlling the size of at least one of the irradiation areas. It is related with the illuminating device and the illuminating method which can reproduce | regenerate and can improve a relaxation effect.

The conventional lighting device includes a lamp 51 that is a light color / light distribution variable light source and an illumination light source 52, and changes the conditions of light intensity, light distribution, and color temperature to give a “relaxation” to humans. An illumination device has been proposed (see Patent Document 1).
As shown in FIG. 11, the illumination device described in Patent Document 1 (hereinafter referred to as a conventional illumination device) has a floor surface that is substantially opposite to the lamp 51 whose main radiation direction is the ceiling direction (upward direction). The light emitted from the lamp 51 is reflected directly or directly by the reflecting plate 53 and passes through the condenser lens 54 and passes through the liquid crystal panel 55, so that the color of the passing light is provided. By controlling the temperature and amount, and by providing a mechanism that can change the projection direction by providing the reflecting plate 53 with a direction changing function, it can be projected onto a wall surface or the like.
JP-A-11-144510

  In the conventional illuminating device, it is possible to change the projection direction on the wall or the like by using not only the ceiling direction which is the main direction of the light from the lamp 51 but also the direction changing function of the reflecting plate 53. However, the size of the irradiation area by the light from the lamp 51 cannot be changed. For example, when reproducing an illumination condition such as “sunset”, the sun will sink to the horizon over time. In addition, there is a problem that the sizes of a plurality of irradiation areas having different colors cannot be individually varied, and a more effective natural light environment cannot be reproduced.

  The present invention is intended to solve the problems of the conventional configuration as described above, and forms a plurality of irradiation areas in which light emitted from a light source reproduces a natural light environment within a viewing angle range. And it aims at providing the illuminating device and the illuminating method which can reproduce a natural light environment more effectively by changing the magnitude | size of at least any one irradiation area | region, and improve a relaxation effect.

Lighting device according to the present invention is a lighting device having a light emitting diode or Ranaru plurality of light sources, the plurality of light sources, each of which emits light of a different color so as to form a plurality of irradiated areas And the plurality of irradiation areas have a mixed color in which the different colors of light are mixed, and include an intermediate area that partially overlaps, so that at least one size of the plurality of irradiation areas can be changed. and wherein the obtaining Bei variable means.

In the present invention, by changing the size of the plurality of irradiation areas individually by the variable means, it is possible to reproduce the situation closer to the natural light environment within the viewing angle range of the user and improve the relaxation effect. Let
Moreover, various colors can be irradiated to the variable irradiation region, and the situation closer to the natural light environment can be reproduced, so that the relaxation effect is improved .
In addition, for example, a changing natural light environment such as dusk to sunset can be reproduced, and a change in the time of the day can be felt, which can be used for maintaining and improving circadian rhythm. You can also taste the seasons .

Lighting device according to the present invention, the variable means moves at least one of said plurality of light sources characterized that you change the size of the irradiated region.

The illumination device according to the present invention includes a cylindrical casing in which the plurality of light sources are incorporated, and the variable unit moves the plurality of light sources linearly within the casing .

Lighting device according to the present invention includes: a storage unit for storing the conditions for reproducing the natural light environment, on the basis of the condition, and wherein Rukoto and a position control unit for controlling the variable means.

Lighting device according to the present invention, based on the condition, you comprising an optical quality control unit for controlling the color or illumination intensity of the light source.

An illumination device according to the present invention includes a sensor that measures ambient brightness, and the position control unit or the light quality control unit includes the variable unit according to the condition and ambient brightness measured by the sensor, The color or irradiation intensity of the light source is controlled.

  According to the present invention, since the configuration is as described above, the natural light environment can be more effectively reproduced within the viewing angle range of the user, so that the relaxation effect can be improved.

(Embodiment 1)
Hereinafter, Embodiment 1 of the illumination device of the present invention will be described with reference to FIGS.

  FIG. 1 is a schematic perspective view of a lighting device according to Embodiment 1 of the present invention, FIG. 2 is a schematic cross-sectional view of the lighting device according to Embodiment 1 of the present invention, and FIG. 2 is an enlarged view of a main part of the light source of FIG. 2, and FIG. 4 is a schematic block diagram of the illumination apparatus according to Embodiment 1 of the present invention. FIG. 5 is a control flow diagram of the lighting apparatus according to Embodiment 1 of the present invention. FIG. 6 is a correspondence diagram of the size of the irradiation area of the illumination device according to Embodiment 1 of the present invention and the movement position of the light source substrate, and FIG. 7 is a variable diagram of the illumination device according to Embodiment 1 of the present invention. FIG. 8 is a light distribution characteristic diagram in the light irradiation section of the illumination apparatus according to Embodiment 1 of the present invention, and FIGS. 9A and 9B are illuminations according to Embodiment 1 of the present invention. It is irradiation area explanatory drawing of an apparatus.

  First, the structure of the illuminating device 10 concerning this Embodiment 1 of this invention is demonstrated using FIGS. 1-4.

  The illumination device 10 according to the first embodiment incorporates light source substrates 2a and 2b on which light sources such as light emitting diodes (hereinafter referred to as LEDs) and organic ELs are mounted, and surrounds the periphery of the light source substrates 2a and 2b. The first light irradiating unit 1a and the second light irradiating unit 1b respectively provided with the reflection diffusion sheets 3a and 3b arranged in the above, and the light source in the first light irradiating unit 1a and the second light irradiating unit 1b. Actuators 5a and 5b that individually move the substrates 2a and 2b, a storage unit 7 that stores irradiation conditions corresponding to setting conditions selected by the user, and the light source and the actuator based on information in the storage unit 7 It is comprised from the control part 6 which controls 5a * 5b.

  The first (upper) light irradiation unit 1a and the second (lower) light irradiation unit 1b each have a light source such as an LED and an electronic component such as a light source control circuit inside a cylindrical housing. Reflective diffusion sheet 3a in which convex portions, concave portions, etc. for diffusing light are provided on the mounted light source substrates 2a and 2b and a reflective sheet formed using a highly reflective material formed into a plate shape by polycarbonate resin or the like 3b, and transmission plates 4a and 4b that transmit the light emitted from the light source at the ends of the housings (the housing end on the optical axis direction side of the light emitted from the light sources). Is provided. By covering with the transmission plates 4a and 4b, it is possible to prevent dust and the like from entering the lighting device 10 of the present invention.

  The first light irradiation unit 1a and the second light irradiation unit 1b are juxtaposed in a direction perpendicular to the floor surface on which the illumination device 10 is placed, and the first light irradiation unit 1a and the second light irradiation unit 1b are arranged side by side. The two light irradiating portions 1b incorporate rectangular light source substrates 2a and 2b having different sizes. In particular, as shown in FIG. 3, each of the light source substrates 2a and 2b has white LEDs of different colors arranged in a matrix. In the illumination device 10 of the present invention, a bluish white LED having a correlated color temperature of 12,000K is arranged on the upper light source substrate 2a, and a reddish white LED having a correlated color temperature of 2,400K is arranged on the lower light source substrate 2b. doing.

  In addition, although the structure of each said light source board | substrate 2a * 2b uses white LED by single color, it is not restricted to this, What used combining the single color LED of 2 or more colors so that white light can light-emit, An RGB-LED, that is, a one-package color LED having a three-color configuration of RGB may be used in combination, or a white LED and a color LED may be effectively combined. And besides LED, organic EL, a light bulb, a fluorescent tube, etc. may be used, and these may be used in combination.

The shape of each of the light source substrates 2a and 2b is not limited to a rectangle, but may be a polygon such as a triangle or a quadrangle, a circle, or a donut shape. The size of the light source substrates 2a and 2b is the same. You may use the said light source board | substrate 2a * 2b of a magnitude | size.
Further, the number of the light source substrates 2a and 2b used in the illumination device 10 of the present invention is not limited, and a configuration in which a plurality of light source substrates 2a and 2b are built in one light irradiation unit may be employed.

  Furthermore, the reflection diffusion sheets 3a and 3b may use a reflection sheet that reflects light from the light source. If the surface is coated white, the light emitted from the light source can be reflected more efficiently. I can do it.

  Furthermore, although the said 1st light irradiation part 1a and the 2nd light irradiation part 1b are juxtaposed in the orthogonal | vertical direction with respect to the floor surface which is a mounting surface of the illuminating device 10 of this invention, it is not restricted to this. Instead, they may be juxtaposed in the horizontal direction, arranged concentrically, or arranged obliquely.

  In addition, although the edge part of each housing | casing which comprises the said 1st light irradiation part 1a and the 2nd light irradiation part 1b is covered with the transmissive plates 4a and 4b, it is not restricted to this, A lens, a diffuser plate, etc. These optical members may be used. Moreover, it is good also as a structure which covers a some housing | casing edge part with one permeation | transmission board.

  The actuators 5a and 5b linearly move the light source substrates 2a and 2b on which the light sources and the like are mounted in a cylindrical casing constituting the first light irradiation unit 1a and the second light irradiation unit 1b. By connecting the light source substrates 2a and 2b and the control unit 6 described later, the light source substrates 2a and 2b can be individually controlled in accordance with a signal from the control unit 6, and the light emitted from the light source can be controlled. The size of the irradiation area can be varied.

  The actuators 5a and 5b may be any device that generates power, such as a motor, a hydraulic cylinder, an air cylinder, and a piezoelectric element.

The storage unit 7 corresponds to the setting condition which is the natural light environment that the user wants to reproduce, and the size (hereinafter referred to as distribution condition) of the irradiation area of the light emitted from the light source substrates 2a and 2b and the irradiation. A color and an irradiation intensity (hereinafter referred to as a light quality condition) for each region are stored. (Hereinafter, the distribution conditions and the light quality conditions are collectively referred to as irradiation conditions.)
The setting conditions can be set freely by the user via an operation unit (not shown), and the distribution conditions and the light quality conditions corresponding to the set setting conditions can be set. Since various natural light environments can be reproduced, the lighting device is suitable for usability.

  The control unit 6 corresponds to the irradiation condition determination unit 6A that reads out the irradiation condition stored corresponding to the setting condition selected by the user, and the irradiation condition read out by the irradiation condition determination unit 6A. The distribution control unit 6B that converts the irradiation range values (numerical values 0 to 100) of the first light irradiation unit 1a and the second light irradiation unit 1b, respectively, and each of the above values according to each value from the distribution control unit 6B Based on the light quality conditions stored in the storage unit 7 and the position control unit 6C that controls the actuators 5a and 5b to move the light source substrates 2a and 2b, the irradiation intensity of the light emitted from the light sources And the light quality control unit 6D for controlling the color (color temperature), and individually control the actuators 5a and 5b and the light source substrates 2a and 2b to reproduce the natural light environment close to the selected setting condition. Do

  Next, a more detailed description of each of the above configurations will be described with reference to FIG.

  When the user selects the setting condition to be reproduced via an operation unit (not shown) such as a remote controller, the irradiation condition determination unit 6A stores the irradiation condition stored corresponding to the setting condition selected from the storage unit 7. Is read. Of the read irradiation conditions, the distribution conditions are sent to the distribution control unit 6B, and the light quality conditions are sent to the light quality control unit 6D. The distribution control unit 6B sets the distribution conditions corresponding to the irradiation conditions to the irradiation. The light source substrates 2a and 2b can be moved by converting the range light source values into range values and controlling the actuators 5a and 5b by the position controller 6C according to the converted values. It is possible to vary the size of the irradiation area formed by the light. The light quality control unit 6D individually controls the color and emission intensity of the light sources mounted on the light source substrates 2a and 2b according to the light quality conditions.

  By individually controlling each of the light source substrates 2a and 2b, a different color can be irradiated for each irradiation region formed by each of the light source substrates 2a and 2b, and the size of the irradiation region can be individually varied. I can do it. In addition, the natural light environment can be more effectively reproduced within the viewing angle range of the user, and a relaxing effect can be given to the user who visually recognizes the reproduced irradiation area. The viewing angle range is a direction that a user who uses the lighting device 10 of the present invention is viewing, and indicates a range that the user's visual acuity reaches.

  Moreover, the continuous irradiation area | region can be formed by irradiating the light from each said light source board | substrate 2a * 2b in a substantially identical direction. Therefore, since irradiation regions of different colors or sizes can be formed continuously, various natural light environments can be reproduced, and the relaxation effect on the user is improved. In addition, the term “continuous” as used herein may be a state in which a plurality of irradiation areas are connected in a range that does not give the user a sense of incongruity.

  Next, operation | movement of the illuminating device 10 concerning Embodiment 1 of this invention is demonstrated using FIG.

  First, when the user selects a natural light environment (setting conditions) to be reproduced using an operation unit such as a remote controller, the flow starts (step S0). Not only the operation by the user, but it may be started at a predetermined time.

  When this flow is started by the user, the irradiation condition determination unit 6A calls the irradiation condition Pa stored corresponding to the setting condition selected by the user (step S1). The irradiation condition Pa is configured by the size of the irradiation area corresponding to the set condition, the color of the light source, and the irradiation intensity, and the size of the irradiation area is relative to the floor surface on which the illumination device 10 of the present invention is placed. It is determined by the irradiation angle of light irradiated in the vertical direction. And the said irradiation conditions Pa are required in order to control each actuator 5a * 5b each connected with each light source board | substrate 2a * 2b incorporated in the 1st light irradiation part 1a and the 2nd light irradiation part 1b, respectively. These values are stored in the storage unit 7 in correspondence with various conversion values (irradiation range values) (see FIG. 6).

  For example, if the natural light environment to be reproduced is “dusk”, the size of the irradiation region of the light emitted from the first light irradiation unit 1a (upper light source substrate 2a) is “30” in order to reproduce “dusk”. The color of the light emitted from the upper light source irradiates “slightly weak” with “bluish white” and the size of the irradiation area of the light emitted from the second light irradiation unit 1b (lower light source substrate 2b) The irradiation condition Pa is “70”, and the color of light emitted from the light source is “slightly red”.

  Then, the position of each of the light source substrates 2a and 2b is moved according to the value of the size of the irradiation area constituting the called irradiation condition Pa, and the irradiation area constituting the irradiation condition Pa is irradiated. The light source is controlled in accordance with the color of the light source and the intensity of irradiation (step S2).

  That is, the size “30” of the irradiation region of the first light irradiation unit 1a is converted into “retraction 2” which is the position information of the light source substrate 2a, and the light source substrate 2a is moved, and “bluish white” is changed to “ “Slightly weak”. At the same time, the irradiation area size “70” of the second light irradiation unit 1b is converted to “forward 2”, and “reddish white” is irradiated “slightly intensely” (see FIG. 6).

  Next, the irradiation condition setting unit 6A calls the second irradiation condition Pb from the storage unit 7 (step S3), and stores the size of the irradiation region, the color of the light source, and the irradiation stored corresponding to the irradiation condition Pb. The intensity value is compared with the size of the irradiation region, the color of the light source, and the irradiation intensity constituting the irradiation condition Pa set in step S2, and the unit change amount is obtained (step S4).

  The unit change amount calculation method is as follows. First, when “sunset” is to be reproduced after “dusk”, “sunset” is selected as the irradiation condition Pb, and each piece of information for reproducing the “sunset” The size of the irradiation region of the first light irradiation unit 1a is “60”, the color of the light source is “bluish white”, the irradiation intensity is “normal”, the size of the irradiation region of the second light irradiation unit 1b is “40”, The color “reddish white” and the irradiation intensity “slightly strong” are read out.

  Next, a unit change amount of each value is obtained. First, the difference (unit time) ΔT = Tb−T0 between the current time T0 and the time Tb at which “sunset” is to be reproduced is obtained, and the unit change amount ΔW1 = (30−60) / ΔT of the size of the irradiation region is obtained. Ask. Similarly, the unit change amount ΔW2 of the irradiation area size, the unit change amounts ΔC1 and ΔC2 of the color of the light source, and the unit change amounts ΔS1 and ΔS2 of the irradiation intensity are calculated for each of the light irradiation units 2a and 2b.

  Next, if each unit change amount can be calculated, measurement of the unit time ΔT is started (step S5). When the time ΔT is measured (step S6), the unit change amounts ΔW1, ΔW2, ΔC1, ΔC2, ΔS1, and ΔS2 are gradually changed within a range that does not give the user a sense of incongruity (step S7). When the time Tb at which the irradiation condition Pb is desired to be reproduced is reached (step S8), the irradiation is again performed under the irradiation condition Pb (step S9).

  Next, if the third setting condition Pc is selected, the process returns to step S3, and various conditions corresponding to the irradiation condition Pc are read out. Further, if the irradiation condition Pc is not set (step S10), the process proceeds to step S11, the irradiation is performed until the irradiation duration time Tz of the irradiation condition Pb elapses, and the control end signal by the user is confirmed or the irradiation is continued. When the time Tz is reached (steps S11 and S12), the irradiation is stopped, the automatic control is terminated (step S13), and this flow is terminated.

  In any step of the above flow, the user can operate the operation unit to interrupt the automatic control, and the lighting device can be used under the irradiation conditions that the user wants to reproduce.

  Next, variable means (variable part) for changing the size of the irradiation area will be described with reference to FIGS.

  The cylindrical housing in which the light source substrates 2a and 2b are built is provided with transmission plates 4a and 4b that transmit light emitted from the light source substrates 2a and 2b at one end. Although the illumination device 10 of the present invention includes a plurality of light irradiators 2a and 2b, the variable means of the first light irradiator 1a will be described below for convenience of explanation.

  The light source substrate 2a built in the first light irradiation unit 1a can be moved in the housing through the actuator 5a by a signal from the control unit 6. As shown in FIG. 7A, when the light source substrate 2a is closest to the transmission plate 4a (when the light source substrate 2a is advanced), the light emitted from the light source is transmitted through the transmission plate 4a (light emission). Surface) and irradiate the ceiling or wall. The light transmitted through the transmission plate 4a has a light distribution characteristic as shown in FIG. The light distribution characteristic is the magnitude of the light intensity with respect to the irradiation angle when the light intensity (light intensity) of the front (0 degree) is 100, for example, the light intensity of the light irradiated at an irradiation angle of 60 degrees. The size of is about 50% of the light irradiated at an irradiation angle of 0 degree (the portion formed by a bold circle).

  And the irradiation area | region A formed with the light irradiated to the ceiling, the wall, etc. is an area | region formed with the light radiate | emitted directly from the light source (it is not the irradiation area | region formed with the light refracted | refracted by reflection etc.). However, even if the light is directly irradiated, the light diffuses as the distance from the center of the irradiation region increases, so that the amount of light decreases as the distance from the center of the irradiation region A increases.

  On the other hand, as shown in FIG. 7B, when the light source substrate 2a is farthest from the transmission plate 4a (when the light source substrate 2a is moved backward), the light emitted from the light source is directly walled. The light that is reflected and diffused by the irradiation region B formed by irradiating, etc., and the reflection diffusion sheet 3a (not shown) provided in the housing, and diffused through the transmission plate 4a It is divided into an irradiation region C formed by

  In addition, the light distribution characteristic in the said irradiation area | region B becomes a magnitude | size as shown in FIG.8 (b) (part formed with the thick circle).

  Further, when comparing the irradiation area C and the irradiation areas A and B, the irradiation area C is formed by light that has been reflected and diffused at least once, so that the irradiation intensity of the irradiation area C is weak and thin. Become a color. Therefore, the irradiation regions B and C formed when the light source substrate 2a is farthest from the transmission plate 4a are formed around the irradiation region B formed by direct light from the light source substrate 2a. Therefore, the amount of light attenuates as the distance from the center of the irradiation area increases.

  Next, a description will be given of a case where the irradiation area of the illumination device 10 of the present invention changes from “daytime → dusk → sunset” with time using the variable means (variable part).

  In particular, as shown in FIG. 9A (a), when reproducing the natural light environment of “daytime”, the color of the light source is controlled to white of 12,000 K using only the upper (first) light source substrate 2a, and irradiation is performed. Region a is formed. At this time, by turning off the lower light source, it is possible to reproduce the “daytime” sky in a relatively high position such as a wall or ceiling.

  Therefore, when a user who spends a long time indoors looks up at the wall surface, ceiling, etc., he / she can visually recognize (recognize) the irradiation area a that reproduces the clear sky with no clouds, giving the user relaxation.

  Next, as shown in FIG. 9A (b), when a predetermined time elapses, the lower light source starts to light in white at 2,400K. An irradiation region c and an irradiation region d (intermediate region) having colors different from the irradiation region a formed by the upper light source are gradually formed by the light emitted from the lower light source. The irradiation region c is a region formed by light directly irradiated from the lower light source, and the irradiation region d is an irradiation region formed by light irradiated directly from the irradiation region a and the lower light source. Is a region formed by mixing.

  The irradiation area d is an area having a mixed color in which the color of light from the upper light source and the color of light from the lower light source are mixed, and is formed by light from the light sources provided in the upper and lower parts. A part of the irradiation region is overlapped. Therefore, the colors of the irradiation areas b to d reproduce the “dusk” sky with gradation. That is, the irradiation area c that is reddish gradually spreads from below the irradiation area a that looked like a clear sky, and can be mixed with the irradiation area a to reproduce the sky color of “dusk”. Natural light environment can be effectively reproduced.

  Next, as shown in FIG. 9B (c), when a predetermined time elapses, the lower light source substrate 2b is gradually retracted. By retreating, the size of the irradiation region c formed by the light directly irradiated from the lower light source substrate 2b is gradually reduced, and the irradiation region f whose amount of light is attenuated is formed by the reflected and diffused light. . Further, an irradiation region g in which the irradiation region f and the irradiation region e formed by direct light from the upper light source substrate 2a or r are mixed is formed. Since the irradiation region g is smaller than the irradiation region formed in FIG. 9A (b) due to the lower light source substrate 2b being retracted, the formation position and size of the irradiation region d, which was the intermediate region, are varied. The irradiation region g is formed. And since the intermediate area | region d becomes small gradually, the magnitude | size of the irradiation area | region b becomes large gradually and forms the irradiation area | region e.

  Therefore, the state of the sky immediately before the sun goes down (“sunset”) can be reproduced by gradually reducing the reddish irradiation area b that reproduced “dusk”. At the same time, the sky just before “sunset” can be reproduced by gradually reducing the irradiation intensity of the light emitted from the upper light source substrate 2a.

  Next, as shown in FIG. 9B (d), when a predetermined time further elapses, the output of the light source of the upper light source substrate 2a is gradually suppressed (decreased), and control is performed to turn off the light. Therefore, the size of the irradiation region e formed by the upper light source substrate 2a is gradually reduced, and the size of the irradiation region g which is the intermediate region is also gradually reduced. At the same time, the size of the irradiation region f formed by the light directly irradiated from the lower light source substrate 2b gradually increases to form the irradiation region h.

  Therefore, the blue sky disappears from the sky pattern just before “sunset”, and the state of the sky at “sunset” can be reproduced over time. Further, by gradually lowering the irradiation intensity of the light emitted from the lower light source substrate 2b, the sky after “sunset” can be reproduced.

  As mentioned above, since the time spent indoors, such as hospital rooms and nursing homes, can be felt even in an environment where it is difficult to be exposed to outside light, it is possible to feel changes in the time of the day, thus maintaining and improving the circadian rhythm (biological daily income rhythm) It can be used to prevent and improve depression and seasonal emotional disorder.

  Moreover, you may use optical members, such as a plate-shaped lens, for example, a Fresnel lens, instead of the permeation | transmission board 4a. When a condensing type lens such as a convex lens is used as the plate-like lens, the light emitted from the light source substrate 2a is collected at one point. Therefore, the size of the irradiation region is larger than when the transmission plate 4a is used. It can be controlled narrowly. Therefore, for example, it is possible to reproduce a natural light environment according to the user's purpose, such as reproducing a cloud in a blue sky, so that a relaxing effect can be given to the user.

  On the other hand, when a diffusion type lens such as a concave lens is used, the light emitted from the light source substrate 2a can be diffused through the lens. Therefore, the irradiation area is larger than when the transmission plate is used. Can be increased. Therefore, it is possible to form an irradiation area that reproduces a larger natural light environment within the viewing angle range of the user. For example, when the user looks up at the ceiling or wall to rest his eyes while working on a desk In addition, it is possible to visually recognize the sky that expands greatly, and as a result of the visual recognition, it is possible to give the user a relaxing effect.

  When the lens is used, the irradiation angle formed by the light from the light source substrate 2a is utilized by changing the incident angle of the light incident on the lens if the lens installation angle is controlled. Therefore, an irradiation region suitable for usability can be formed without increasing the amount of light entering the user's eyes more than necessary.

  In addition to controlling the installation angle of the lens, it is possible to control the irradiation direction of light emitted from the plurality of light irradiation units 1a and 1b for each of the light irradiation units 1a and 1b. The irradiation region can be formed in the direction desired by the user.

  Further, an optical member such as a diffusion plate may be used instead of the transmission plate 4a. When a diffuser plate is used, the light emitted from the light source substrate 2a is diffused by the diffuser plate, so that the variable width when the size of the formed irradiation region is varied is reduced, but more uniform. Irradiation light can be obtained.

  Furthermore, by controlling the light color of the light source, it is not limited to reproducing the sky color as one of the natural light environments, but it can also be controlled to reproduce various natural light environments such as forests, plateau atmospheres, and coastal atmospheres. May be.

In the first embodiment, it is assumed that the illumination device 10 of the present invention is placed on the floor and an irradiation area is formed on the wall, ceiling, or the like, and therefore, with an existing illumination device such as a ceiling light. It can be used together, and even when used together, the indoor light environment can be controlled without directly changing the color at hand.
In addition, the natural light environment can be reproduced by controlling the upper and lower light source substrates 2a and 2b individually without being limited to the light source substrates 2a and 2b.
(Embodiment 2)
Hereinafter, Embodiment 2 of the illuminating device 11 of this invention is demonstrated based on FIG.

  FIG. 10 is a schematic block diagram of a lighting apparatus according to Embodiment 2 of the present invention.

  The illuminating device 11 according to the second embodiment is different from the first embodiment in that it includes an illuminance sensor (illuminance measurement unit) 8 that measures ambient illuminance, and other configurations are the same as those of the first embodiment. Therefore, the same reference numerals are given and detailed description thereof is omitted.

  The illuminance sensor 8 in the second embodiment is a sensor that senses ambient brightness and measures ambient illuminance, and is a position where the illumination light of the illumination device 11 itself of the present invention is not directly sensed, for example, the illumination device. It is provided on the upper surface.

  As shown in FIG. 10, the control unit 6 according to the second embodiment uses the light source substrates 2a and 2b and the actuators 5a and 5b based on the irradiation conditions read from the storage unit 7 by the irradiation condition determination unit 6A. Is controlled in consideration of the condition of the illuminance L measured by the illuminance sensor 8.

  In the irradiation condition determination unit 6A, reference illuminances L0 and L0 ′ are set in advance. For example, the illuminance L0 is an average illuminance during the daytime and the illuminance L0 ′ is an average illuminance at night.

  If the illuminance L measured by the illuminance sensor 8 is L0 <L, the irradiation intensity of the light irradiated from the light irradiation units 1a and 1b is increased, and if L0> L, the irradiation intensity is decreased. By controlling the irradiation intensity in accordance with the illuminance of the light source, it is possible to clearly perceive the color of the lighting device 11 of the present invention in consideration of ambient brightness in the daytime, which is effective in maintaining and improving the biological rhythm. It becomes a lighting device. Moreover, since it becomes the illuminating device 11 which does not increase the light which enters into a user's eyes more than necessary, the irradiation area which reproduced natural light environment can be visually recognized without feeling glare, and the relaxation effect is improved.

  Further, at night, when the illuminance L measured by the illuminance sensor 8 is L0 ′ <L, the illumination is turned off, and if L0 ′> L, irradiation is performed according to the irradiation condition read from the storage unit 7, etc. By controlling the irradiation intensity in consideration of the illuminance of light, it is possible to control the irradiation intensity to be suppressed or to be turned off when the surroundings are bright. Therefore, it is possible to provide an illumination device aimed at maintaining and improving the biological rhythm without increasing the light entering the user's eyes more than necessary.

  Also, the illuminance L0 / L0 ′ taken into account by the illuminance condition determination unit 6A may be a single value, and a user-configurable configuration using the operation unit or the like improves usability with which an energy saving effect can be expected. It becomes a suitable lighting device.

  Although the second embodiment of the present invention has been described using the illuminance sensor 8, a configuration using various sensors such as a distance sensor may be used. When the distance sensor is provided, it is possible to measure the distance between the lighting device 11 and the wall or ceiling that is the irradiation target, and by controlling the irradiation intensity etc. according to the distance, The illuminating device 11 which can restrict | limit the quantity of the light which enters can be provided.

  As described above, in Embodiments 1 and 2, the use examples in which the lighting devices 10 and 11 of the present invention are placed on the floor surface have been described. It can also be used as a lighting device that illuminates. When used as indoor lighting, it is possible to illuminate with different colors and brightness (irradiation intensity) for each irradiation region formed by the plurality of light irradiation units 1a and 1b. It is possible to provide an illuminating device that emits a favorite color according to a user.

  In addition, since it can control separately for each said light irradiation part 1a * 1b, it can illuminate only a narrow area indoors by controlling the magnitude | size of the irradiation area | region from one light irradiation part 1a small. Therefore, it can be used as an illuminating device that illuminates only the user without disturbing sleep of the roommate at night or the like and without feeling dazzling.

  And if it is set as the structure provided with a human sensitive sensor, an irradiation area can be formed in the direction where the person detected by the human sensitive sensor is present, and a user can illuminate the place where he is present with a simpler operation. I can do it.

  Furthermore, by setting the colors emitted from the plurality of light irradiation units to the same color or similar colors, it can be used as a lighting device for the entire room without a sense of incongruity.

  Moreover, in the illuminating devices 10 and 11 of this invention, each said light source board | substrate 2a * 2b built in the said 1st light irradiation part 1a and the 2nd light irradiation part 1b is straightened via said actuator 5a, 5b. Although the variable means for changing the size of the irradiation area by moving it has been described, the present invention is not limited to this, and the optical members such as the transmission plates 4a and 4b and the lens may be variable. And it is good also as a structure which varies the angle of the said optical member. By changing the angle of the optical member, the irradiation direction can be changed, so that the irradiation region in which the natural light environment is reproduced in the user's desired direction (such as the viewing angle region) can be reproduced.

It is a schematic perspective view of the illuminating device concerning Embodiment 1 of this invention. It is a schematic sectional drawing of the illuminating device concerning Embodiment 1 of this invention. It is a principal part enlarged view of the light source concerning Embodiment 1 of this invention. It is a schematic block diagram of the illuminating device concerning Embodiment 1 of this invention. It is a control flow figure of the illuminating device concerning Embodiment 1 of this invention. It is a corresponding | compatible figure of the magnitude | size of the irradiation area | region of the illuminating device concerning Embodiment 1 of this invention, and the movement position of a light source board | substrate. It is variable means explanatory drawing of the illuminating device concerning Embodiment 1 of this invention. It is a light distribution characteristic view in the light irradiation part of the illuminating device concerning Embodiment 1 of this invention. It is irradiation area explanatory drawing of the illuminating device concerning Embodiment 1 of this invention. It is irradiation area explanatory drawing of the illuminating device concerning Embodiment 1 of this invention. It is a schematic block diagram of the illuminating device concerning Embodiment 2 of this invention. It is sectional drawing which shows the structure of the conventional illuminating device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a 1st light irradiation part 1b 2nd light irradiation part 2a, 2b Light source board 3a, 3b Reflection diffusion sheet 4a, 4b Transmission plate 5a, 5b Actuator 6 Control part 6A Irradiation condition determination part 6B Distribution control part 6C Position control part 6D Light quality control unit 7 Storage unit 8 Illuminance sensor

Claims (6)

A lighting device having a light emitting diode or Ranaru plurality of light sources,
The plurality of light sources are
Each of which emits light of different colors Yes so as to form a plurality of irradiated areas,
The plurality of irradiation areas are:
It has a mixed color in which the light of different colors is mixed, and includes an intermediate region partially overlapping,
Lighting device characterized by obtaining Bei variable means for enabling changing at least one of the magnitude of the plurality of illumination areas. The variable means is
The lighting device according to claim 1, characterized that you change the size of the irradiation region is moved at least one of said plurality of light sources. A cylindrical housing in which the plurality of light sources are incorporated,
The variable means is
The lighting device according to claim 2, characterized in Rukoto move linearly a plurality of light sources in the housing. A storage unit for storing conditions for reproducing the natural light environment;
A position controller for controlling the variable means based on the condition;
The illumination device according to any one of claims 1 to 3, characterized in Rukoto equipped with. Based on the condition, the lighting device according to claim 4, characterized in Rukoto with light quality control unit for controlling the color or illumination intensity of the light source. It has a sensor that measures ambient brightness,
The position controller or the light quality controller is
6. The illumination device according to claim 4, wherein the variable means, the color of the light source, or the irradiation intensity is controlled according to the condition and ambient brightness measured by the sensor. .

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