JP2020057632A - Lighting device - Google Patents

Abstract

To provide a lighting device capable of properly controlling a sub light source when color matching control of a main light source is performed.SOLUTION: A lighting device includes: a main light source; a sub light source; and a control part. In the main light source, a content ratio of a predetermined color component light to outgoing light changes by color matching control. The sub light source irradiates light containing the predetermined color component of the main light source. In the control part, when the color matching control of the main light source is performed, increase/decrease in light having the predetermined color component of the sub light source is based on increase/decrease of light having the predetermined color component of the main light source when a content ratio of light having the predetermined color component of the main light source is smaller than a predetermined value. The control part decreases the predetermined color component of the sub light source when the content ratio of light having the predetermined color component of the main light source is larger than the predetermined value.SELECTED DRAWING: Figure 1

Description

  Embodiments of the present invention relate to a lighting device including a main light source and a sub light source.

  Conventionally, there is a lighting device in which a main light source that emits white light and a sub-light source that emits light of an arbitrary color different from white light are provided in an appliance body, and these light sources are covered with a diffusion cover. In this lighting device, control is performed so that the entire diffusion cover has uniform color and brightness.

  Some of the main light sources are capable of outputting light of color components such as daylight color and light bulb color, and are capable of toning the main light source. When toning the main light source, it is necessary to appropriately control the sub light source so that the light from the sub light source does not cause a sense of incongruity.

JP 2012-186118 A

  The problem to be solved by the present invention is to provide an illuminating device that can appropriately control a sub light source when performing toning control of a main light source.

  The lighting device according to the embodiment includes a fixture main body having a top plate and a side plate; a plurality of colors for emitted light provided by a toning control disposed on a side surface of the fixture main body so as to be inclined toward the center of the fixture main body. A light source that changes the proportion of the component light contained therein; a control unit that controls the color of the light source; and a diffusion cover that is provided on the lower surface side of the instrument body and diffuses light emitted from the light source. Have.

  According to the present invention, it can be expected that the toning control of the light source is appropriately controlled.

FIG. 3 is an explanatory diagram illustrating a relationship between a correlated color temperature and light intensity in the lighting device according to the first embodiment. It is sectional drawing of a lighting device same as the above. It is a perspective view of a lighting device same as the above. FIG. 3 is a perspective view of a diffusion cover of the lighting device. FIG. 2 is a perspective view of the lighting device in a lighting state. It is a block diagram of the control part of a lighting device same as the above. FIG. 2 is a block diagram of a lighting control system using the lighting device. FIG. 11 is an explanatory diagram illustrating a relationship between a correlated color temperature and light intensity in the lighting device according to the second embodiment. FIG. 11 is an explanatory diagram illustrating a relationship between a correlated color temperature and light intensity in the lighting device according to the third embodiment. FIG. 14 is an explanatory diagram illustrating a relationship between a correlated color temperature and light intensity in the lighting device according to the fourth embodiment. It is explanatory drawing which shows the relationship between the correlated color temperature and the light intensity in the illumination device which shows 5th Embodiment. It is explanatory drawing which shows the relationship between the correlated color temperature and the light intensity in the illumination device which shows 6th Embodiment. FIG. 2 is a block diagram of a lighting control system using the lighting device.

  Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 7.

  As shown in FIG. 5, the lighting device 10 is a ceiling-mounted lighting device that is embedded and installed in an embedded hole formed in a ceiling surface 11.

  2 and 3 show the configuration of the lighting device 10. FIG. The lighting device 10 includes a fixture main body 12, a diffusion cover 13, a decorative frame 14, a main light source 15, and a sub light source 16.

  The appliance main body 12 is formed in a rectangular box shape, and has a top plate 20, side plates 21 facing each other in a first direction a along the top plate 20, and a second plate orthogonal to the first direction a. In the direction b. A rectangular irradiation opening 23 is formed in the lower surface of the instrument body 12. A body frame 24 is used for assembling the top plate 20 and the side plates 21 and 22.

  The inner surfaces of the top plate 20 and the side plates 21 and 22 are formed on a reflective surface 25 having a high reflectance, such as a white surface.

  As shown in FIGS. 2 to 4, the diffusion cover 13 is made of, for example, a milky white resin material having a light-transmitting property and a light-diffusing property, and is integrally formed by, for example, a pressure molding method. The diffusion cover 13 is curved in a bending direction (first direction a) connecting one opposed side and is formed linearly in a width direction (second direction b) connecting the other opposed side. The cover portion 13A, side portions 13B provided on both side surfaces in the width direction (second direction b) orthogonal to the bending direction (first direction a) of the cover portion 13A, the cover portion 13A and the side portion The edge 13B has an edge 13C protruding outward from the periphery of the lower end. The diffusion cover 13 has a peripheral edge 13C fitted into the decorative frame 14 and attached thereto.

  The cover portion 13A of the diffusion cover 13 is a light emitting surface 13D that emits light by being irradiated with light from the main light source 15 and the sub light source 16.

  The diffusion cover 13 attached to the decorative frame 14 is disposed on the device main body 12 so as to cover the irradiation opening 23, and is curved so as to be depressed toward the inside of the device main body 12.

  The diffusion cover 13 (light emitting surface 13D) has a central region 13a in the bending direction (first direction a) and end regions 13b at both ends of the central region 13a. Is configured to match.

  Further, the decorative frame 14 is formed in a square frame shape having a square opening 28 in the center, and is attached to lower ends of the side plates 21 and 22 of the instrument body 12. That is, the decorative frame 14 is provided around the irradiation opening 23 of the instrument body 12.

  The decorative frame 14 includes a decorative plate portion 29 provided in a rectangular frame shape, and a mounting portion 30 which is raised from the upper surface of the decorative plate portion 29 and is mounted on the side plates 21 and 22.

  On the outer peripheral side of the decorative plate portion 29, an edge portion 31 that covers the embedding hole of the ceiling surface 11 and faces the ceiling surface 11 is provided.

  On the inner edge of the decorative plate portion 29 in the first direction a, opposed portions 32 projecting toward the center of the decorative frame 14 are provided. The facing portion 32 faces the lower surface of the end region 13b of the diffusion cover 13 with a gap provided between the facing portion 32 and the lower surface of the end region 13b of the diffusion cover 13. The upper surface of the facing portion 32 is formed on a reflective surface having a high reflectance, such as a white surface.

  In the present embodiment, the decorative frame 14 is provided such that the width of the decorative plate portions 29 located on both sides in the first direction a is wider than the width of the decorative plate portions 29 located on both sides in the second direction b. I have. The facing portion 32 may also be provided on the inner edge of the decorative plate portion 29 in the second direction b, and the width of the entire periphery of the decorative plate portion 29 may be the same.

  Further, the main light sources 15 are provided along the second direction b at positions on both end sides in the first direction a in the instrument body 12.

  The main light source 15 is capable of toning control, includes light of a predetermined color component, and emits white light such as daylight, neutral white, and bulb color used for general illumination light. Note that the main light source 15 may be configured to emit light other than white light. In the present embodiment, for example, a first main light source 15a that emits daylight light having a correlated color temperature of 5000K and a second main light source 15b that emits light of a bulb color having a correlated color temperature of 2700K are provided. . Further, the first main light source 15a having a higher correlated color temperature than the second main light source 15b has a higher ratio of including blue as a predetermined color component.

  As the main light source 15, a light emitting module 35 is used. The light emitting module 35 includes a substrate 36 and a plurality of light emitting elements 37 mounted on the substrate 36. The substrate 36 is formed in a rectangular shape elongated in the second direction b of the instrument body 12, and has a wiring pattern formed on the surface. The plurality of light emitting elements 37 are mounted on the wiring pattern of the substrate 36 in one or a plurality of rows at the center in the width direction of the substrate 36 at predetermined intervals along the longitudinal direction of the substrate 36. As the light emitting element 37, for example, a surface mount type LED is used.

  The light emitting elements 37 of the first main light source 15a and the light emitting elements 37 of the second main light source 15b are arranged in two rows along the longitudinal direction of the substrate 36, or the light emitting elements 37 of the first main light source 15a The light emitting elements 37 of the second main light source 15b are alternately arranged in a line along the longitudinal direction of the substrate 36, and the light emitting elements 37 of the first main light source 15a and the light emitting elements 37 of the second main light source 15b are arranged. Are electrically connected so that the lighting can be controlled independently.

  The main light source 15 using the light emitting element 37 is, for example, in a direction perpendicular to the center of the light emitting surface of the light emitting element 37 and at a range of 120 ° around the optical axis 38 at which the light distribution peaks (the range indicated by the broken line in FIG. Is irradiated with light.

  The main light source 15 is attached to the inner surface of the side plate 21 in the first direction a of the instrument body 12 by an attachment member 39. By the attachment member 39, the main light source 15 is attached so that the optical axis 38 of the light emitting element 37 is inclined at a predetermined angle θ toward the central region 13a of the diffusion cover 13 with respect to the lower surface of the appliance body 12. ing. The predetermined angle θ is set to, for example, 45 ° so that light from the light emitting element 37 is irradiated from the end region 13b of the diffusion cover 13 to the central region 13a.

  Therefore, the main light sources 15 are provided at both end sides in the first direction a in the appliance body 12, and are opposed from the end region 13 b to the central region 13 a of the diffusion cover 13. Light is irradiated from the region 13b to the central region 13a. The light flux of one main light source 15 is, for example, about 3000 lm, and the total light flux of the two main light sources 15 included in the lighting device 10 is about 6000 lm.

  The main light source 15 may be covered with a light-diffusing light source cover in order to uniformly irradiate the end region 13b of the diffusion cover 13 with light.

  The sub light source 16 is provided along the second direction b at a central position in the instrument body 12.

  The sub light source 16 emits light of a predetermined color light component included in the light emitted by the main light source 15. The light of the color component emitted by the sub light source 16 includes, for example, one of blue or red or two of them, or a plurality of colors such as red, green and blue. In the first embodiment, the sub light source 16 emits blue light.

As the sub light source 16, a light emitting module 42 is used. The light emitting module 42 includes a substrate 43 and a plurality of light emitting elements 44 mounted on the substrate 43. The board 43 is formed in a rectangular shape elongated in the second direction b of the instrument body 12, and has a wiring pattern formed on the surface. The plurality of light emitting elements 44 are mounted on the wiring pattern of the board 43 in one or more rows at the center in the width direction of the board 43 at predetermined intervals along the longitudinal direction of the board 43. For the light emitting element 44, for example, a surface mount type LED is used.

  The sub-light source 16 using the light emitting element 44 is, for example, in a direction perpendicular to the center of the light emitting surface of the light emitting element 44 and about 120 ° around the optical axis 45 where the light distribution peaks (the range indicated by the broken line in FIG. 1). Is irradiated with light.

  The auxiliary light source 16 is arranged such that the optical axis 45 of the light emitting element 44 is vertically opposed to the top of the central area 13a of the diffusion cover 13, that is, the optical axis 45 of the light emitting element 44 is perpendicular to the lower surface of the instrument body 12. In this way, it is attached to the center of the lower surface of the top plate 20 of the instrument body 12.

  Accordingly, the auxiliary light source 16 is provided at the center of the instrument body 12, faces the central area 13 a of the diffusion cover 13, and irradiates the central area 13 a of the diffusion cover 13 with light. The light flux of the sub light source 16 is, for example, about 270 lm when the light of the sub light source 16 is blue light. In order for the lighting device 10 to maintain the function of the main illumination by the light from the main light source 15 and to prevent the space from being discolored by the light from the sub light source 16, the light flux of the sub light source 16 It is preferably smaller than the light flux of the light source 15, for example, 1/5 or less, more preferably 1/7 or less.

  The auxiliary light source 16 may be covered with a light-diffusing light source cover in order to uniformly irradiate the central region 13a of the diffusion cover 13 with light.

  As shown in FIG. 6, the lighting device 10 includes a dimming device 50 that outputs a dimming signal for turning on and off the main light source 15 and the sub light source 16, respectively. The dimmer 50 includes main power supply units 51 and 51b for individually supplying power to the first main light source 15a and the second main light source 15b of the main light source 15, and a sub power supply unit for supplying power to the sub light source 16. A dimming signal is input to 52 to turn on / off and dimming the first main light source 15a, the second main light source 15b, and the sub light source 16 of the main light source 15, respectively. The light control device 50 includes a control unit 53. The control unit 53 controls the light control of each of the first main light source 15a and the second main light source 15b individually, and thereby controls the color control of the main light source 15. The control unit 53 controls the increase or decrease of the light of the sub light source 16 according to the input dimming signal. Note that the main power supply units 51a and 51b and the sub power supply unit 52 that supplies power to the sub light source 16 may be provided integrally with the dimmer 50.

  FIG. 7 shows a lighting control system 60 using a plurality of lighting devices 10. The lighting control system 60 includes a control device 61, a plurality of lighting devices 10, and two signal lines 62 for communicably connecting the control device 61 and each lighting device 10, each of which has two lines. Is composed of light rays. Then, the control device 61 sends a dimming signal to each lighting device 10 to turn on / off, dimming and toning each lighting device 10. The dimming signal includes a signal of the dimming rate of each of the first main light source 15a and the second main light source 15b. That is, one of the two signal lines 62 transmits information on the dimming rate of the first main light source 15a, and the other transmits information on the dimming rate of the second main light source 15b.

  Next, the operation of the lighting device 10 will be described.

  By supplying power to the main light source 15 and the sub light source 16 from the main power supply units 51a and 51b and the sub power supply unit 52, respectively, the main light source 15 and the sub light source 16 are turned on.

  The light from the main light source 15 is irradiated from the end region 13b of the diffusion cover 13 to the central region 13a, the light from the sub light source 16 is irradiated to the central region 13a of the diffusion cover 13, and the light emitting surface 13D of the diffusion cover 13 shines .

  In this case, as shown in FIG. 5, the end region 13b of the diffusion cover 13 is illuminated in daylight (or light bulb color) by light from the main light source 15, and the central region 13a of the diffusion cover 13 is illuminated by light from the sub light source 16. Glows blue.

  Light from the main light source 15 transmitted through the diffusion cover 13 is applied to the illumination space. In this case, the main light source 15 is provided on the end side of the fixture body 12, and the optical axis 38 of the main light source 15 is inclined toward the center of the lighting device 10, so that the embedded lighting device 10 Even so, light from the main light source 15 can be applied to a region having a wide light distribution angle.

  The light from the sub light source 16 illuminated on the central area 13a of the diffusion cover 13 is a light flux such that the central area 13a of the diffusion cover 13 is dyed blue, so that the light is transmitted through the central area 13a of the diffusion cover 13 and illuminated. The amount of blue light applied to the space is smaller than the light from the main light source 15.

  For this reason, the illumination space is mainly irradiated with light from the main light source 15, which provides an illumination environment suitable for, for example, reading and working.

  The central region 13a of the diffusion cover 13 is irradiated with both the light from the main light source 15 and the light from the sub light source 16, but the amount of light from the main light source 15 is reduced to the end region of the diffusion cover 13. The amount of light from the sub light source 16 gradually increases from the periphery of the central region 13a of the diffusion cover 13 toward the center while gradually decreasing from the center 13a toward the central region 13a. Therefore, between the end region 13b and the central region 13a of the diffusion cover 13, a gradation region whose color gradually changes between white and blue is formed. Therefore, when looking up at the lighting device 10, the color of the diffusion cover 13 appears to change naturally via the gradation area, and the light effect can be enhanced.

  Even if the light color of the sub light source 16 is blue, the central region 13a of the diffusion cover 13 becomes a blue color close to sky blue by mixing the blue color with the white light emitted from the main light source 15. In this case, a person who looks up at the lighting device 10 is easily associated with the sky, and a sense of openness and a sense of relaxation are easily obtained.

  Therefore, according to the lighting device 10, it is possible to obtain a light effect while maintaining the function of the main lighting by the light from the main light source 15.

  Further, since the central area 13a of the diffusion cover 13 is curved so as to be depressed inside the instrument main body 12, a sense of depth and a sense of opening as if the central area 13a of the diffusion cover 13 illuminated by light from the auxiliary light source 16 are far away. And the light effect can be improved.

  Next, control of the main light source 15 and the sub light source 16 by the control unit 53 in the case where the main light source 15 is toned will be described with reference to FIG. 1, the horizontal axis indicates the correlated color temperature of the main light source 15, and the vertical axis indicates the light intensity of the main light source 15 and the sub light source 16.

  When the correlated color temperature of the main light source 15 is 2700K, which is the lowest, the ratio of the light of the first main light source 15a is approximately 0%, and the ratio of the light of the second main light source 15b is 100%. In the case where the correlated color temperature of the main light source 15 is 5000 K, which is the highest, the light ratio of the first main light source 15a is 100%, and the light ratio of the second main light source 15b is a small value close to 0%. is there. FIG. 1 shows, for convenience, the light intensity of the first main light source 15a and the second main light source 15b and the sub light source 16 when the correlated color temperature changes from 2700K to 5000K so that the output of the main light source 15 becomes constant. Shows the light intensity of Therefore, in the present embodiment, it is also possible to change the light output of the main light source 15 while keeping the correlated color temperature constant.

  In the case where the brightness of the main light source 15 is constant (the illuminance is constant) and the correlated color temperature of the main light source 15 is toned, the light of the first main light source 15a is increased by increasing the correlated color temperature from 2700K. Increases, and the light of the second main light source 15b decreases. At this time, a color component whose proportion included in the emitted light increases with an increase in the correlated color temperature is defined as a predetermined color component included in the main light source 15. In the present embodiment, the predetermined color component is described as a blue component. Similarly, when the correlated color temperature is lowered from 5000 K, the light of the first main light source 15a decreases and the light of the second main light source 15b increases. At this time, as described above, as the correlated color temperature decreases, the ratio of the predetermined color component included in the emitted light decreases. Therefore, since the increase and decrease of the light of the first main light source 15a and the increase and decrease of the light of the second main light source 15b are reversed, the brightness of the main light source 15 is constant (the illuminance is constant), and Is adjusted.

  Further, when the correlated color temperature when the light of the first main light source 15a and the light of the second main light source 15b are mixed is smaller than a predetermined value, that is, the ratio of the light containing the predetermined color component is larger than the predetermined value. Is smaller, the light of the sub light source 16 is increased or decreased according to the increase of the light of the first main light source 15a. That is, when the light of the first main light source 15a increases and the correlated color temperature increases, in other words, when the ratio of the predetermined color component included in the main light source 15 increases, the light of the sub light source 16 also increases, When the light of the first main light source 15a decreases and the correlated color temperature decreases, in other words, when the ratio of the light containing the predetermined color component is smaller than a predetermined value, the light of the sub light source 16 also decreases.

  Thereby, as the end region 13b of the light emitting surface 13D becomes daylighting, the blue feeling of the central region 13a of the light emitting surface 13D is strengthened, and a rendering effect such as a blue sky is obtained. As the end region 13b becomes light-bulb color, the blue feeling of the central region 13a of the light emitting surface 13D is weakened, and an effect like a sunset sky can be obtained.

  Further, when the correlated color temperature when the light of the first main light source 15a and the light of the second main light source 15b are mixed is larger than a predetermined value, that is, the ratio of the light of the predetermined color component is larger than the predetermined value. Is larger, the increase / decrease of the light of the sub light source 16 is reversed with respect to the increase / decrease of the light of the first main light source 15a. That is, when the light of the first main light source 15a increases and the correlated color temperature increases, in other words, when the ratio of the predetermined color component included in the main light source 15 increases, the light of the sub light source 16 decreases, The light of the sub light source 16 increases when the light of the first main light source 15a decreases and the correlated color temperature decreases, in other words, when the ratio of the light of the predetermined color component included decreases. It should be noted that various modes can be selected for reducing the light output of the sub light source 16 when the ratio of the predetermined color component included in the main light source 15 exceeds a predetermined value. For example, it may be reduced at a fixed rate as the predetermined color component included in the light emitted from the main light source 15 increases, or may be turned off at an arbitrary correlated color temperature.

  Thereby, as the end region 13b of the light emitting surface 13D is irradiated with white light having a high correlated color temperature of, for example, 4500K or more, the central region 13a of the light emitting surface 13D becomes too blue, giving a sense of incongruity. The effect can be prevented from being lost.

  When the correlated color temperature is changed from 2700 K to 5000 K so that the output of the main light source 15 is constant, the predetermined value A is the first main light source when the ratio of the predetermined color component becomes the predetermined value. 15a light intensity. The light intensity of the sub light source 16 at the predetermined value A is appropriately set to such a value that the effect of rendering the sky formed on the light emitting surface 13D can be obtained and the user does not feel uncomfortable. In addition, the light intensity of the sub light source 16 at a predetermined correlated color temperature decreases as the output of the main light source 15 decreases, and a specific numerical value can be appropriately set. Can also.

  Therefore, according to the illuminating device 10, the sub light source 16 can be appropriately controlled when the main light source 15 is toned, and therefore, the effect of producing an unnatural feeling can be obtained on the light emitting surface 13D of the illuminating device 10.

Next, FIG. 8 shows a second embodiment. Note that the same components as those of the first embodiment are denoted by the same reference numerals, and the description of the configuration, operation, and effect is omitted.

  8, the horizontal axis indicates the correlated color temperature of the main light source 15, and the vertical axis indicates the light intensity of the main light source 15 and the sub light source 16.

  As described above, the controller 53 controls the main light source 15 so that the brightness is constant (illuminance is constant), the correlated color temperature is toned, and the sub light source 16 is also controlled according to the toning.

  In the present embodiment, the predetermined color component included in the main light source 15 is described as red. When the light of the second main light source 15b is smaller than the predetermined value B, when the ratio of the predetermined color component included in the main light source 15 is smaller than the predetermined value, the light of the second main light source 15b is increased. , The light of the sub light source 16 is increased or decreased. In other words, when the light of the second main light source 15b increases and the correlated color temperature decreases, the light of the auxiliary light source 16 also increases. When the light of the second main light source 15b decreases and the correlated color temperature increases, the auxiliary light temperature increases. The light of the light source 16 also decreases.

  Thereby, as the end region 13b of the light emitting surface 13D becomes a light bulb color, in the central region 13a of the light emitting surface 13D, an effect like a sky from daytime to evening can be obtained, and As the end region 13b of the surface 13D becomes daylight-colored, the red color of the central region 13a of the light-emitting surface 13D becomes weaker, and it is possible to prevent the user from feeling uncomfortable.

  When the light of the second main light source 15b is larger than the predetermined value B, that is, when the ratio of the predetermined color component included in the main light source 15 is larger than the predetermined value, the increase or decrease of the light of the sub light source 16 is performed. The second light source 15b is reversed with respect to the increase or decrease of the light. That is, when the light of the second main light source 15b increases and the correlated color temperature decreases, the light of the sub light source 16 decreases. When the light of the second main light source 15b decreases and the correlated color temperature increases, the sub light source 16b decreases. The light of the light source 16 increases.

  Thereby, when the color of the light bulb in the end region 13b of the light emitting surface 13D becomes strong, the central region 13a of the light emitting surface 13D is prevented from becoming too red, and an effect such as a sunset sky without a sense of incongruity can be obtained. I can do it.

  The predetermined value B is appropriately set to such a value that the effect of producing the sky formed on the light emitting surface 13D is obtained and the user does not feel uncomfortable. For example, it is preferable that the correlated color temperature is 3000K.

  Therefore, according to the illuminating device 10, the sub light source 16 can be appropriately controlled when the main light source 15 is toned, and therefore, the effect of producing an unnatural feeling can be obtained on the light emitting surface 13D of the illuminating device 10.

  Next, FIG. 9 shows a third embodiment. Note that the same components as those of the first embodiment are denoted by the same reference numerals, and the description of the configuration, operation, and effect is omitted.

  The horizontal axis in FIG. 9 shows the correlated color temperature of the main light source 15, and the vertical axis shows the light intensity of the main light source 15 and the sub light source 16.

  As described above, the controller 53 controls the main light source 15 so that the brightness is constant (illuminance is constant), the correlated color temperature is toned, and the sub light source 16 is also controlled according to the toning.

  As the predetermined value, a first predetermined value C1 that sets the light intensity of the first main light source 15a as a threshold value and a second predetermined value C2 that sets the light intensity of the second main light source 15b as a threshold value are set. Is provided.

When the light of the first main light source 15a is smaller than the first predetermined value C1 and the light of the second main light source 15b is smaller than the second predetermined value C2, the light of the sub light source 16 is fixed or a correlated color. It shall rise or fall slightly as the temperature rises.

  When the light of the first main light source 15a is larger than the first predetermined value C1, the light of the sub light source 16 is increased / decreased by reversing the increase / decrease of the light of the first main light source 15a. That is, when the light of the first main light source 15a increases and the correlated color temperature increases, the light of the sub light source 16 decreases, the light of the first main light source 15a decreases, and the light of the second main light source 15b decreases. Increases and the correlated color temperature decreases, the light of the sub light source 16 increases.

  Accordingly, it is possible to prevent the central region 13a of the light emitting surface 13D from becoming too blue as the end region 13b of the light emitting surface 13D becomes daylighting.

  Further, when the light of the second main light source 15b is larger than the predetermined value C2, that is, when the ratio of the light emitted from the main light source 15 containing the predetermined color component is equal to or less than the predetermined value, the light of the sub light source 16 decreases.

  Thus, when the color sense of the bulb in the end region 13b of the light emitting surface 13D becomes strong, the blue color feeling in the central region 13a of the light emitting surface 13D is weakened, and an effect such as a sunset sky can be obtained. In other words, while the color of the bulb in the end region 13b of the light-emitting surface 13D becomes stronger, if it shines in blue in the central region 13a of the light-emitting surface 13D, it will not be possible to obtain the effect of a sunset sky. Can be prevented.

  Then, the predetermined values C1 and C2 are appropriately set to values that provide the effect of producing the sky formed on the light emitting surface 13D and do not cause a feeling of strangeness. Preferably, the first predetermined value C1 is, for example, where the correlated color temperature is 4500K, and the second predetermined value C2 is, for example, where the correlated color temperature is 3500K.

  Therefore, according to the illuminating device 10, the sub light source 16 can be appropriately controlled when the main light source 15 is toned, and therefore, the effect of producing an unnatural feeling can be obtained on the light emitting surface 13D of the illuminating device 10.

  Next, FIG. 10 shows a fourth embodiment. Note that the same components as those of the third embodiment are denoted by the same reference numerals, and the description of the configurations and the operation and effects is omitted.

  The horizontal axis in FIG. 10 shows the correlated color temperature of the main light source 15, and the vertical axis shows the light intensity of the main light source 15 and the sub light source 16.

  9, the light of the first main light source 15a is smaller than the first predetermined value C1, and the light of the second main light source 15b is smaller than the second predetermined value C2. If it is smaller, the light of the sub light source 16 is increased in accordance with the increase or decrease of the first main light source 15a or in reverse to the increase or decrease of the second main light source 15b.

  Thereby, when the end region 13b of the light emitting surface 13D changes from the bulb color to the daylight color, the blue feeling of the central region 13a of the light emitting surface 13D can be enhanced, and an effect like a blue sky can be obtained.

  Next, FIG. 11 shows a fifth embodiment. Note that the same components as those of the third embodiment are denoted by the same reference numerals, and the description of the configurations and the operation and effects is omitted.

  11, the horizontal axis indicates the correlated color temperature of the main light source 15, and the vertical axis indicates the light intensity of the main light source 15 and the sub light source 16.

9, the light of the first main light source 15a is smaller than the first predetermined value C1, and the light of the second main light source 15b is smaller than the second predetermined value C2. If it is smaller, the light of the sub light source 16 is increased in accordance with the increase or decrease of the second main light source 15b or reversed to the increase or decrease of the first main light source 15a.

  As a result, as the light of the first main light source 15a becomes stronger, the light causes the central region 13a of the light emitting surface 13D to appear more blue, and thus the light of the second main light source 16 is weakened. The central region 13a of 13D can keep the blue feeling constant.

  Next, FIG. 12 and FIG. 13 show a sixth embodiment. Note that the same reference numerals are used for the same configurations as those of the above-described embodiments, and the description of the configurations and operational effects is omitted.

  As shown in FIG. 13, the sub light source 16 includes a first sub light source 16a that emits blue light and a second sub light source 16b that emits red light. In addition, as a sub power supply unit, a first sub power supply unit 52a that supplies power to the first sub light source 16a and a second sub power supply unit 52b that supplies power to the second sub light source 16b are provided.

  12, the horizontal axis indicates the correlated color temperature of the main light source 15, and the vertical axis indicates the light intensity of the main light source 15 and the sub light source 16.

  As described above, the controller 53 controls the main light source 15 so that the brightness is constant (illuminance is constant), the correlated color temperature is toned, and the sub light source 16 is also controlled according to the toning.

  As the predetermined value, a first predetermined value C1 that sets the light intensity of the first main light source 15a as a threshold value and a second predetermined value C2 that sets the light intensity of the second main light source 15b as a threshold value are set. Is provided.

  When the light of the first main light source 15a is smaller than the first predetermined value C1, the light of the first sub light source 16a is increased or decreased according to the increase of the light of the first main light source 15a. That is, when the light of the first main light source 15a increases and the correlated color temperature increases, the light of the first sub light source 16a also increases, and the light of the first main light source 15a decreases and the correlated color temperature decreases. Sometimes, the light of the first sub light source 16a also decreases. Thereby, as the end region 13b of the light emitting surface 13D becomes daylight-colored, the blue feeling of the central region 13a of the light emitting surface 13D is strengthened, and an effect such as a blue sky is obtained, and the light emitting surface 13D As the end region 13b becomes light-bulb color, the blue feeling of the central region 13a of the light emitting surface 13D is weakened, and an effect like a sunset sky can be obtained.

  Further, when the light of the second main light source 15b is smaller than the second predetermined value C2, the light of the second sub light source 16b is increased or decreased according to the increase of the light of the second main light source 15b. That is, when the light of the second main light source 15b increases and the correlated color temperature decreases, the light of the second auxiliary light source 16b also increases, and the light of the second main light source 15b decreases and the correlated color temperature increases. When this happens, the light of the second sub light source 16b also decreases. This enhances the red color of the central region 13a of the light emitting surface 13D as the end region 13b of the light emitting surface 13D becomes light-bulb-colored, and provides a sky-like effect from daytime to evening. In addition, as the end region 13b of the light emitting surface 13D becomes daylight-colored, the redness of the central region 13a of the light emitting surface 13D can be weakened so that the user does not feel uncomfortable.

  When the light of the first main light source 15a is larger than the first predetermined value C1, the increase or decrease of the light of the first sub light source 16a is reversed with respect to the increase or decrease of the light of the first main light source 15a. That is, when the light of the first main light source 15a increases and the correlated color temperature increases, the light of the first sub light source 16a decreases, and the light of the first main light source 15a decreases and the correlated color temperature decreases. When this happens, the light of the first sub light source 16a increases. Accordingly, it is possible to prevent the central region 13a of the light emitting surface 13D from becoming too blue as the end region 13b of the light emitting surface 13D becomes daylighting, thereby preventing the effect from being lost.

  When the light of the second main light source 15b is larger than the second predetermined value C2, the increase or decrease of the light of the second sub light source 16b is reversed with respect to the increase or decrease of the light of the second main light source 15b. That is, when the light of the second main light source 15b increases and the correlated color temperature decreases, the light of the second sub light source 16b decreases, and the light of the second main light source 15b decreases and the correlated color temperature increases. When this happens, the light of the second sub light source 16b increases. Thereby, when the color of the bulb in the end region 13b of the light emitting surface 13D becomes strong, it is possible to prevent the central region 13a of the light emitting surface 13D from becoming too red, and it is possible to obtain an effect such as a sunset sky without a sense of discomfort. I can do it.

  Note that, in each embodiment, the diffusion cover 13 may be formed in a spherical shape that curves from the center to the top and toward the periphery. In this case, the periphery of the diffusion cover 13 may be either a square shape or a circular shape. Further, the main light source 15 may be provided in the entire peripheral area of the side surface of the instrument body 12 so as to irradiate the diffusion cover 13 with white light from the outer diameter side of the diffusion cover 13.

  Further, the diffusion cover 13 may have a flat plate shape, or may be curved such that the central region 13a protrudes from the instrument body 12.

  Further, a projector may be provided to face the central area 13a of the diffusion cover 13 of the appliance body 12, and an image such as a cloud may be projected on the central area 13a of the diffusion cover 13. In this case, the bright light source 16 may be provided on the end side of the appliance body 12 together with the main light source 15 so as to irradiate light between the central region 13a and the end region 13b of the diffusion cover 13.

  Although several embodiments of the present invention have been described, these embodiments are provided by way of example and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

10 Lighting equipment
15 Main light source
16 Secondary light source
53 Control unit
60 Lighting control system
61 Controller A, B Predetermined value
C1 First predetermined value
C2 Second predetermined value

Claims (2)

An instrument body having a top plate and side plates;
A light source that is disposed on the side surface of the instrument body so as to be inclined toward the center of the instrument body, and that changes a ratio of a plurality of color components included in the emitted light by toning control;
A control unit for controlling the color of the light source;
A diffusion cover disposed on the lower surface side of the instrument body and diffusing light emitted from the light source;
A lighting device comprising: The lighting device according to claim 1, wherein there are two or more kinds of the predetermined color components.