JP2012048860A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire that improve human's visibility after lighting a light source by emitting light matching the human's visibility over the entire irradiation range of the light source.SOLUTION: The luminaire includes an illumination part 1 equipped with a plurality of light source parts 11 which emit light by a plurality of divided areas 71 of the irradiation range, and change wavelength constitution of the light, a movement detection part 6 which detects a lighting state of another luminaire, a storage part 4 which stores internal data representing lightness of each area 71 only with the light that the light source parts 11 emit, and external data representing lightness of each area 71 only with light that the another luminaire emits by lighting states of the another luminaire, an operation part 3 which computes the ratio of a long-wavelength component and a short-wavelength component of the light that the light source parts 11 emit based upon the sum of the internal data and external data corresponding to a detection result of the movement detection part 6, and a control part 5 which controls the wavelength constitution of the light that the light source parts 11 emit based upon operation results of the respective areas 71 by the operation part 3.

Description

  The present invention relates to a lighting device.

  Conventionally, as a device that realizes energy saving and improved visibility, there has been proposed a lighting device that includes a sensor that detects the brightness of the irradiation range of the light source and feedback-controls the output level of the light source using the detection result of the sensor. (For example, refer to Patent Document 1).

  In Patent Document 1, the brightness of the floor surface is constantly monitored by a luminance detector that can be installed at an arbitrary location. Then, an area where the necessary brightness is obtained by natural lighting and an area where the necessary brightness is not obtained are discriminated, and lighting on / off is automatically controlled.

  Further, it is known that human visibility changes depending on the brightness of the surroundings. There are two types of optical sensors in the human retina: cones and rods. In a bright environment (hereinafter referred to as photopic vision), a cone works, and in a dark environment (hereinafter referred to as dark vision), a rod works so that brightness can be perceived. Furthermore, it is known that both cones and rods work in a dim environment (hereinafter referred to as twilight).

  In photopic, scotopic, and dimmed vision, the luminous sensitivity characteristics (spectral luminous efficiency) differ depending on the wavelength of light due to the difference in optical sensors (cone and rod) that work on the human retina. FIG. 15 shows spectral luminous efficiency in photopic and scotopic visions. As shown in FIG. 15, the peak wavelength of the spectral luminous efficiency R1 in photopic vision is 555 nm, and the peak wavelength of the spectral luminous efficiency R2 in dark vision is 507 nm.

  For example, the color of light that feels bright (the color that is easy to see) differs between daytime (light vision) and nighttime (dark vision). As it changes from daytime to evening and nighttime, it changes from photopic vision to twilight vision and scotopic vision, so the light that feels bright also changes to the short wavelength side.

  Therefore, a headlamp device has been proposed that changes the color of light emitted by a vehicle headlamp based on human visibility characteristics (see, for example, Patent Document 2). The headlamp device of Patent Document 2 detects the brightness around the vehicle, and increases the blue component (short wavelength component) in the case of a predetermined low illuminance state. Thereby, the visibility of the light from the headlamp is improved from other vehicles.

JP 7-21814 A JP 2007-10634 A

  In the headlamp device of Patent Document 2, the visibility of the headlamp from another vehicle is improved, but the visibility of the irradiation range by the headlamp is not considered. That is, since the brightness of the irradiation range changes before and after the headlamp is turned on, the visibility characteristics (adaptation state) of the eye change.

  In addition, the brightness varies within the irradiation range of the headlamp depending on the distance from the headlamp or ambient light, and the brightness of the range irradiated with one light source is not uniform. Therefore, the adaptation state of the eyes is different even within the irradiation range, and it is not sufficient to realize a good visual environment simply by detecting the brightness at one location and determining the light output level.

  In Patent Document 1, energy saving is achieved by detecting the brightness of natural light or the like for each area and adjusting the light output level, but the wavelength configuration of the light is not changed. That is, the illumination device of Patent Document 1 does not consider the visibility.

  This invention is made | formed in view of the said reason, The objective can irradiate the light suitable for human visual sensitivity over the whole irradiation range of a light source, and can improve the visibility after light source lighting. The object is to provide a lighting device.

  The illumination device according to the present invention irradiates light to each area obtained by dividing a predetermined range into a plurality of areas, and includes an illumination unit including a plurality of light source units that make the wavelength configuration of the light variable, and irradiates the area with light An operation detection unit that detects a lighting state of the lighting device, first data indicating brightness for each area only by light emitted from the light source unit, and each lighting state of the other lighting device The second data corresponding to the detection result of the storage unit storing the second data indicating the brightness for each area only by the light irradiated by the lighting device, the first data, and the operation detection unit. Based on the sum of the data, based on the calculation result for each area of the calculation unit, the calculation unit for calculating the ratio of the long wavelength component and the short wavelength component of the light emitted by the light source unit for each area, The wavelength configuration of light that the light source unit irradiates the area. Characterized in that it comprises a control unit for controlling.

  In this illumination device, the light source unit includes a high color temperature light source having a high color temperature and a low color temperature light source having a color temperature lower than that of the high color temperature light source, and the control unit is configured to perform the calculation. It is preferable to control the wavelength configuration of the light emitted by the light source unit by performing dimming control on the high color temperature light source and the low color temperature light source based on the calculation result of the unit.

  In this illumination device, the light source unit includes a high color temperature light source having a high color temperature and a low color temperature light source having a color temperature lower than that of the high color temperature light source, and the control unit is configured to perform the calculation. It is preferable to control the wavelength configuration of the light emitted from the light source unit by turning on only one of the high color temperature light source and the low color temperature light source based on the calculation result of the unit.

  In this lighting device, the light source unit includes a plurality of the high color temperature light sources and a plurality of the low color temperature light sources, and the high color temperature light sources and the low color temperature light sources are alternately mounted. It is preferable.

In this illumination device, the illumination unit has a mounting surface on which the light source unit is mounted,
The mounting surface is preferably formed in a curved surface.

  As described above, the present invention has an effect of improving the visibility after the light source is turned on by irradiating light suitable for human visibility over the entire irradiation range of the light source.

It is a figure which shows the block block diagram of the illuminating device of Embodiment 1 of this invention. It is a graph which shows the spectral intensity of the light which LED of the light source part same as the above irradiates. (A) It is the schematic which shows the irradiation range of the illumination part same as the above. (B) It is a graph which shows the detection result of the detection part in each area. It is a graph which shows the adaptation brightness | luminance of each area. It is a graph which shows the spectral intensity of the light which the light source part same as the above irradiates. It is a flowchart which shows control same as the above. (A) It is a graph which shows the spectral intensity of the light which high color temperature LED and low color temperature LED irradiate. (B) It is a table | surface which shows the characteristic of the light which a high color temperature LED and low color temperature LED irradiate. It is the schematic which shows the external appearance of high color temperature LED and low color temperature LED. (A) It is the schematic which shows the external appearance of the instrument main body by which the mounting surface was formed in the spherical surface. (B) It is the schematic which shows the external appearance of the instrument main body by which the mounting surface was formed in the plane. (A) It is the schematic which shows mounting arrangement | positioning of high color temperature LED and low color temperature LED. (B) It is the schematic which shows distribution of the light irradiated to each area. (A) It is the schematic which shows mounting arrangement | positioning of high color temperature LED and low color temperature LED. (B) It is the schematic which shows distribution of the light irradiated to each area. It is a schematic block diagram of the street light provided with the input terminal. (A) It is a schematic block diagram of an instrument main body. (B) It is the schematic which shows arrangement | positioning of LED. It is a figure which shows schematic structure of the street light provided with the camera. It is a graph which shows a visibility characteristic.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
The illuminating device of this embodiment is an illuminating device used at night or indoors where natural light is not irradiated. Further, another illumination device different from the illumination device of the present embodiment is provided in the vicinity of the illumination device of the present embodiment, and light emitted by the other illumination devices is irradiated by the illumination device of the present embodiment. The following description will be made on the assumption that the area is irradiated.

  The illuminating device of this embodiment includes an illuminating unit 1, an input unit 2, a calculation unit 3, a storage unit 4, a control unit 5, and an operation detection unit 6.

  The illumination unit 1 includes a plurality of light source units 11. The light source unit 11 of this embodiment includes a blue LED 12a, a green LED 12b, and a red LED 12c. FIG. 2 shows the relative spectral intensities of the LEDs 12a to 12c. 2, G1 indicates the spectral intensity of the blue LED 12a, G2 indicates the spectral intensity of the green LED 12b, and G3 indicates the spectral intensity of the red LED 12c. In addition, the light source unit 11 includes a lighting circuit 13. The lighting circuit 13 is configured such that the output levels of the LEDs 12a to 12c are variable by controlling the lighting power supplied to the LEDs 12a to 12c from a power source (not shown). And the wavelength structure (spectral intensity) of the color mixing light of each LED12a-12c can be changed for every light source part 11 by changing the output level of each LED12a-12c. In addition, although the light source part 11 of this embodiment is comprised by LED, it is not limited to LED, A discharge lamp or organic EL etc., such as a fluorescent lamp, may be sufficient.

  FIG. 3A shows a schematic diagram of the irradiation range of the illumination unit 1. The illumination unit 1 irradiates light toward the road surface 7. Specifically, the irradiation range of the illumination unit 1 is divided into a plurality of areas 71, and each light source unit 11 irradiates light to the area 71 corresponding to each. In the present embodiment, the area immediately below the illumination unit 1 is 71a, the area away from the illumination unit 1 on one side is 71b, and the area away from the illumination unit 1 on the other side is 71c. The area 71c is irradiated with light 8 (hereinafter referred to as ambient light 8) emitted from a light source provided in another illumination device. Hereinafter, the light source unit that irradiates light to the area 71a will be described as 11a, the light source unit that irradiates light to the area 71b as 11b, and the light source unit that irradiates light to the area 71c as 11c.

  FIG. 4 shows a distribution diagram of brightness (adaptation luminance) in the irradiation range of the illumination unit 1. L1 shown in FIG. 4 is the adaptation luminance due to only the light irradiated by the illumination unit 1, L2 is the adaptation luminance due to only the ambient light 8, and L3 is the sum of the adaptation luminance due to the light irradiated by the illumination unit 1 and the ambient light 8. Yes.

  The input unit 2 includes an input terminal for the user to input the brightness of each area 71, and includes a monitor, a switch, and the like. The user measures the adaptation brightness of each area 71 by only the ambient light 8 (hereinafter referred to as “external adaptation brightness”), and operates the input unit 2 to input the correspondence between the measurement result and the lighting state of another illumination device. (Refer to L2 in FIG. 4). In this measurement, the user measures the external adaptation brightness using an illuminometer or the like in a nighttime state where each area 71 is not irradiated with natural light and in a state where the illumination unit 1 is turned off. At this time, when another lighting device can perform dimming control of the light source, the external adaptation luminance in the dimming state and the dimming level can be input to the input unit 2 in association with each other. In the present embodiment, the other lighting devices do not have a dimming function, and control is performed only for full lighting and extinguishing. Therefore, the user performs input by associating the measured external adaptation brightness with full lighting.

  And if the external adaptation brightness | luminance and total lighting which were measured above are input using the input part 2, the calculating part 3 will match | store the external adaptation brightness | luminance and full lighting of each area 71 which were input, and will be memorize | stored. 4 is stored.

  The calculation unit 3 is composed of a microcomputer or the like and has a function as a signal processing unit. And the calculating part 3 matches the external adaptation brightness | luminance input with the input part 2, and all lighting, and stores it in the memory | storage part 4 as external data (2nd data).

  Further, in the storage unit 4, the adaptation luminance of each area 71 (hereinafter referred to as “internal adaptation luminance”) only by the light irradiated by the illumination unit 1 provided in the illumination device of the present embodiment is stored in the internal data (first data). ) In advance (see L1 in FIG. 4).

  The operation detection unit 6 detects the lighting state of another lighting device. The operation detection unit 6 of the present embodiment is composed of a radio signal receiver. In addition, other lighting devices include a transmitter (not shown) that transmits a state signal indicating the lighting state of the lighting device by a wireless signal. And the operation detection part 6 is detecting the lighting state of another illuminating device by receiving the lighting state signal transmitted from another illuminating device.

  Further, the calculation unit 3 determines the adaptation state of human eyes existing in each area 71 (hereinafter referred to as the adaptation state of the area 71).

  First, the calculation unit 3 refers to the storage unit 4 and acquires external data (see L2 in FIG. 4) corresponding to the detection result of the operation detection unit 6. That is, for example, when other lighting devices are fully lit, external data associated with all lighting is obtained, and when other lighting devices are in a dimming state, external data associated with the dimming level is acquired. .

Further, the calculation unit 3 refers to the storage unit 4 and acquires internal data (see L1 in FIG. 4). And the calculating part 3 derives | leads-out the adaptation brightness | luminance (henceforth a comprehensive adaptation brightness | luminance) of each area 71 by adding the acquired internal data and external data (refer L3 of FIG. 4). FIG. 3B shows a derivation result of the calculation unit 3 in each area 71. The area 71a is directly under the illumination unit 1, has the highest overall adaptation brightness, and is 20 cd / m ² . Since the area 71b is away from the illuminating unit 1, the total adaptation luminance is low and is 0.5 cd / m ² . The area 71c is separated from the illumination unit 1, but the ambient adaptation brightness is high because the ambient light 8 is irradiated, and is 13 cd / m ² .

The calculation unit 3 of the present embodiment uses an adaptation threshold value to determine the adaptation state (photopic vision, faint vision) of each area 71. The adaptation threshold is set to 10 cd / m ² , and the calculation unit 3 determines that 10 cd / m ² or more is photopic vision and less than 10 cd / m ^{2 is} dim vision.

  Then, the calculation unit 3 calculates the wavelength configuration of the light according to the visibility of each area 71 from the determined adaptation state of each area 71. The calculation unit 3 keeps the intensity of the light emitted from the light source unit 11 (the sum of the output levels of the LEDs 12a to 12c) and varies the output ratio of the LEDs 12a to 12c, thereby changing the light emitted from the light source unit 11. Change the wavelength configuration. Therefore, the calculation unit 3 derives the output ratio of the LEDs 12 a to 12 c for each light source unit 11 corresponding to each area 71 from the adaptation state of each area 71. Then, the calculation unit 3 outputs the derived output ratio (wavelength configuration) of the LEDs 12 a to 12 c of each light source unit 11 to the control unit 5. In this embodiment, when the calculating part 3 judges that it is photopic vision, the calculating part 3 sets the output ratio of each LED12a-12c as blue: green: red = 1.0: 1.0: 1.0. Hereinafter, when the output ratio of each of the LEDs 12a to 12c is blue: green: red = 1.0: 1.0: 1.0, it is referred to as a photopic mode. On the other hand, when the calculating part 3 judges that it is dimmed, the calculating part 3 sets the output ratio of each LED12a-12c as blue: green: red = 1.0: 1.4: 0.6. Hereinafter, when the output ratio of each of the LEDs 12a to 12c is blue: green: red = 1.0: 1.4: 0.6, it is referred to as the twilight mode.

  The control unit 5 includes a power supply unit that drives the lighting device and an output control unit that controls the output levels of the LEDs 12 a to 12 c of the light source units 11. And the control part 5 controls the wavelength structure of the light which the light source part 11 irradiates by controlling the output level of each LED12a-12c of the light source part 11 based on the wavelength structure which the calculating part 3 set.

  FIG. 5 shows the spectral intensity of light emitted from the light source unit 11 (mixed color light of the LEDs 12a to 12c). G4 in FIG. 5 indicates the spectral intensity when the light source unit 11 is turned on in the photopic vision mode, and G5 indicates the spectral intensity when the light source unit 11 is turned on in the low vision mode. As shown in FIG. 5, the light (G5) emitted from the light source unit 11 in the thin vision mode has fewer long wavelength components and the short wavelength component than the light (G4) emitted from the light source unit 11 in the photopic mode. There are many. Therefore, when the light source unit 11 irradiates light in the photopic mode to the area 71 in which the adaptation state is photopic vision, the light is adapted to the visual sensitivity of the human eye and the visibility is improved. On the other hand, when the light source unit 11 irradiates light to the area 71 in which the adaptation state is dim vision, the light becomes light suitable for the visibility of the human eye and visibility is improved.

  Next, the flow of processing performed by the lighting device of the present embodiment will be described using the flowchart shown in FIG.

  In the illumination device of the present embodiment, first, the control unit 5 turns on each light source unit 11 of the illumination unit 1 in the photopic mode and irradiates each area 71 (S1).

  Next, the operation detection part 6 detects the lighting state of another illuminating device (S2). In the present embodiment, the other lighting devices are fully lit, and the operation detection unit 6 detects the fully lit state and outputs the detection result to the calculation unit 3.

  The calculation unit 3 acquires internal data and external data corresponding to the detection result (full lighting) of the operation detection unit 6 from the storage unit 4, and adds the acquired internal data and external data to each area 71. A total adaptation luminance is derived (S3).

And the calculating part 3 judges the adaptation state of each area 71 from a derivation result (S4). As shown in FIG. 4B, the derivation result of the calculation unit 3 is that the total adaptation luminance of the area 71a is 20 cd / m ² , the total adaptation luminance of the area 71b is 0.5 cd / m ² , and the total adaptation luminance of the area 71c. Is 13 cd / m ² . The adaptation threshold is set to 10 cd / m ² . Accordingly, the calculation unit 3 determines that the areas 71a and 71c are photopic and the area 71b is dim.

  And the calculating part 3 calculates the wavelength structure of the light which the light source part 11 corresponding to the area 71 irradiates from the adaptation state of each area 71. The calculation unit 3 derives the wavelength configuration of the light source units 11a and 11c that irradiate light to the areas 71a and 71c determined to be photopic as the photopic mode (S5a). Further, the wavelength configuration of the light source unit 11b that irradiates light to the area 71b that has been determined to be twilight is derived as twilight mode (S5b).

  Next, the control unit 5 controls the wavelength configuration of light emitted from the light source unit 11 based on the wavelength configuration derived by the calculation unit 4 (S6a, S6b). The control unit 5 changes the wavelength configuration of the light source unit 11 based on the wavelength configuration derived by the calculation unit 3 corresponding to the area 71 irradiated by the light source unit 11. In the present embodiment, since the light source units 11a and 11c corresponding to the photopic areas 71a and 71c have already emitted light in the photopic mode, the control unit 4 performs photopic vision of the light sources 11a and 11c. Maintain mode. In addition, in the light source unit 11b corresponding to the area 71b for faint vision, the control unit 4 switches the wavelength configuration from the photopic vision mode to the faint vision mode.

  As described above, the lighting device of the present embodiment detects the lighting state of the other lighting devices, and considers the external adaptation luminance due to the ambient light 8, and the total adaptation luminance of each area 71 after the lighting unit 1 is turned on. Derived, and determines the wavelength configuration according to the visibility of each area 71 after the illumination unit 1 is turned on. And based on this judgment result, the control part 5 switches the wavelength structure of the light source part 11 irradiated to this area 71. FIG. Therefore, in each area 71, the light source 11 emits light that matches the visibility in the lighting state of the light source unit 11, and thus the visibility when the light source unit 11 is in the lighting state can be improved. Furthermore, since the internal data and the external data stored in the storage unit 4 correspond to each area 71, the visibility can be improved over the entire irradiation range of the illumination unit 1.

  When the other lighting devices are turned off, the operation detection unit 6 detects that the other lighting devices are turned off, and the calculation unit 3 is based on only internal data (see L1 in FIG. 4), and the adaptation state of each area 71 is detected. Judging. Accordingly, since the calculation unit 3 determines that the area 71c is also faintly visible, the control unit 5 switches the wavelength configuration of the light source unit 11c to the faintly visible mode.

  In addition, when another lighting device can perform dimming control and is lit in a dimming state, the operation detection unit 6 detects the dimming lighting state and the dimming level of the other lighting device. Then, the calculation unit 3 acquires the internal data and the external data associated with the dimming level from the storage unit 4, derives the total adaptation brightness of each area 71, and determines the adaptation state of each area 71. To do. And based on the determined adaptation state, the wavelength structure of the light which the light source part 11 irradiates is switched.

  In the present embodiment, the areas 71a to 71c are selected from the plurality of areas 71, but the same control as described above is performed for the other areas 71.

  In the present embodiment, the lighting state of the other lighting devices is detected in the state where the light source unit 11 is turned on in the photopic mode, and the total adaptation luminance of each area 71 is derived. In the state where the light source unit 11 is turned on, the total adaptation luminance of each area 71 may be derived. Further, the output ratio of each of the LEDs 12a to 12c is not limited as long as the wavelength configuration matches the visibility based on the total adaptive luminance of each area 71.

In this embodiment, the adaptation state of each area 71 is determined using one adaptation threshold. However, a plurality of adaptation thresholds may be set to switch the wavelength configuration of light step by step. For example, when the total adaptation luminance is smaller than the total adaptation luminance 0.5 cd / m ^{2 of the} mesopic vision area 71b, light corresponding to the visual sensitivity is obtained by increasing the short wavelength component further than in the mesopic vision mode. Further, the wavelength configuration of the light may be continuously changed based on the total adaptive luminance of each area 71.

  Moreover, although the input part 2 of this embodiment is comprised by the input terminal, it is not limited to this structure. For example, the input unit 2 may be configured with a detection sensor that detects the external adaptation luminance, the external adaptation luminance of each area 71 is measured, and external data is automatically stored in the storage unit 4. Good. In this case, the detection sensor is composed of, for example, a photodiode or a camera.

  When the detection sensor is configured by a photodiode, the photodiode detects the external adaptation luminance of each area 71, and the adaptation luminance based on the detection current of the photodiode is stored in the storage unit 4 as external data.

  When the detection sensor is configured by a camera, the camera images each area 71, and performs image processing on the captured data, thereby deriving the external adaptation luminance of each area 71. The derived adaptation brightness of each area 71 is stored in the storage unit 4 as external data.

  In addition, the operation detection unit 6 of the present embodiment is configured by a receiver and detects the lighting state of the other lighting device by receiving a state signal transmitted from the other lighting device. It is not limited to. For example, the operation detection unit 6 may be configured with an illuminance sensor or the like, and may be configured to detect the lighting state of the other illumination device by detecting the illuminance of light emitted by the other illumination device.

(Embodiment 2)
The light source unit 11 of the present embodiment is composed of two types of LEDs. The light source unit 11 according to the first embodiment includes three types of LEDs, a blue LED 12a, a green LED 12b, and a red LED 12c, and irradiates the mixed color light for each area 71. However, the light source unit 11 of the present embodiment is composed of two types of LEDs, a high color temperature LED 12d and a low color temperature LED 12e, and only one of the high color temperature LED 12d and the low color temperature LED 12e is lit. Irradiation is performed for each area 71. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  FIG. 7A shows the relative spectral intensities of the high color temperature LED 12d and the low color temperature LED 12e. G6 shown in FIG. 7A indicates the spectral intensity of the high color temperature LED 12d, and G7 indicates the spectral intensity of the low color temperature LED 12e. Further, as shown in FIG. 7B, the light emitted from the high color temperature LED 12d has chromaticity coordinates of x = 0.2912, y = 0.2921, a correlated color temperature of 8740K, and a deviation of DUV = -4. .48. On the other hand, the light emitted from the low color temperature LED 12e has a chromaticity coordinate of x = 0.3141, y = 0.3343, a correlated color temperature of 6394K, and a deviation of DUV = 5.20. As described above, the high color temperature LED 12d contains a lot of short wavelength components and has a high color temperature. On the other hand, the low color temperature LED 12e has a lower color temperature than the high color temperature LED 12d. That is, when the high color temperature LED 12d is lit, the viewing environment is suitable for light vision, and when the low color temperature LED 12e is lit, the viewing environment is suitable for photopic vision.

  In the present embodiment, only the high color temperature LED 12d is turned on as an initial state, so that it is in dim view. Then, the operation detection unit 6 detects the lighting state of another lighting device, and the calculation unit 3 acquires internal data and external data corresponding to the detection result of the operation detection unit 6 from the storage unit 4, The total adaptive luminance of each area 71 is derived by adding the data and the external data. In addition, it demonstrates below that the derivation | leading-out result of the calculating part 3 is the same as Embodiment 1 (refer FIG. 3 (a) (b)).

  Then, the calculation unit 3 determines the adaptation state of each area 71 from the derivation result of the total adaptation luminance of each area 71. The calculation unit 3 controls turning off of the high color temperature LED 12d and turning on of the low color temperature LED 12e in order to match the wavelength configuration of the light source units 11a and 11c that irradiate the areas 71a and 71c determined as photopic vision with photopic vision. Instruct part 5. Then, the control unit 5 turns off the high color temperature LEDs 12d of the light source units 11a and 11c that irradiate the areas 71a and 71c, and turns on the low color temperature LEDs 12e. Thereby, the color temperature of the light applied to the areas 71a and 71c is low, and the light is suitable for the visibility in photopic vision, and the visibility is improved.

  On the other hand, since the light suitable for the thin vision is irradiated in the initial state, the calculation unit 3 maintains the lighting state of the low color temperature LED 12e of the light source unit 11b that irradiates the area 71b determined to be the thin vision. Therefore, the color temperature of the light irradiated to the area 71b is high, and the light is suitable for the visibility in the dim vision, and the visibility is improved.

  In the present embodiment, a light environment with high visibility can be realized with the same amount of energy by turning on the LEDs 12d and 12e having higher visibility according to the adaptation state of the eyes in each area 71. Furthermore, in this embodiment, since the wavelength configuration of the light irradiated for each area 71 can be changed only by switching on / off the two LEDs 12d and 12e, the control becomes easy.

  In this embodiment, the lighting state of another lighting device is detected with the high color temperature LED 12d lit. However, the lighting state of the other lighting device is detected with the low color temperature LED 12e lit. May be. Moreover, you may detect the lighting state of another illuminating device in the state which lighted LED12d and 12e which are different for every light source part 11. FIG.

  Next, the structure of the illumination unit 1 will be described.

  FIG. 8 shows a schematic diagram of the LEDs 12d and 12e, and FIG. 9A shows a schematic diagram of the illumination unit 1 provided with the LEDs 12d and 12e.

  As shown in FIG. 8, the high color temperature LED 12d and the low color temperature LED 12e of the present embodiment are formed in a substantially hemispherical shape and irradiate light from the bottom surface side toward the spherical surface side. Moreover, the illumination part 1 is comprised by the instrument main body 14 and LED12d, 12e mounted in the instrument main body 14. FIG. As shown in FIG. 9A, the instrument body 14 is formed in a hemispherical shape, and its spherical surface (curved surface) forms a mounting surface, and the high color temperature LED 12d and the low color temperature LED 12e are mounted on the spherical surface. Is done.

  Since the LEDs 12d and 12e have high directivity of the light to irradiate, the irradiation range is limited if the fixture body 14a having a flat mounting surface for the LEDs 12d and 12e is used as shown in FIG. 9B. End up. However, in this embodiment, since the instrument body 14 having a mounting surface formed in a spherical surface is used, the irradiation range can be expanded even when the same number of LEDs 12d and 12e are mounted on the instrument body 14a.

  Next, a specific arrangement of the high color temperature LED 12d and the low color temperature LED 12e mounted on the illumination unit 1 will be described.

  FIG. 10A shows a layout of the high color temperature LED 12d and the low color temperature LED 12e when the illumination unit 1 is viewed from the road surface 7. FIG. In FIG. 10A, the mounting surface of the instrument body 14 is shown as a plane in order to make the arrangement of the LEDs 12d and 12e easier to understand.

  In the illuminating unit 1 of the present embodiment, LEDs 12d and 12e are mounted on the instrument body 14 in 10 rows × 8 columns. The same type of LEDs 12d and 12e are mounted side by side in the same row, and the high color temperature LED 12d and the low color temperature LED 12e are alternately mounted in the same column. In this embodiment, the low color temperature LED 12e is mounted on the first row, and the high color temperature LED 12d is mounted on the second row. The number of LEDs 12d, 12e mounted in 10 rows × 8 columns is an example, and is not limited to 10 rows × 8 columns, and may be configured with other numbers of rows and other columns. Good.

  In this embodiment, one light source unit 11 is configured by the LEDs 12d and 12e mounted in each row. In the present embodiment, the light source unit 11 is configured by the LEDs 12d and 12e mounted in one row. However, the light source unit 11 is not limited to one column, and a plurality of rows may be collectively used as the light source unit 11.

  FIG. 10B shows the light distribution when each area 71 is irradiated using the illumination unit 1 in which the LEDs 12d and 12e are mounted on the instrument body 14 as described above. Note that the overall adaptive luminance of each area 71 will be described below as being the same as in the first embodiment (see FIGS. 3A and 3B). Since the areas 71a and 71c are photopic, they are irradiated with only the light of the low color temperature LED 12e, and the area 71b is irradiated with light of only the high color temperature LED 12d.

  If the low color temperature LED 12e is mounted on the 3rd to 7th rows of the instrument body 13 and the high color temperature LED 12d is mounted on the 1st, 2nd and 8th to 10th rows as shown in FIG. The light distribution 71 is shown in FIG. As shown in FIG. 11B, the photopic areas 71a and 71c are not irradiated with light near both ends, and the light-vision areas 71b are not irradiated with light near the center. Unevenness occurs. However, in the present embodiment, the high color temperature LED 12d and the low color temperature LED 12e are alternately mounted for each row, so that light unevenness in the photopic areas 71a and 71c and the light vision areas 71b is eliminated. It can be suppressed and a good visual environment can be realized.

  Next, the configuration of the input unit 2 will be described.

  The illuminating device of this embodiment is a street light A as shown in FIG. 12, and the illuminating unit 1 is provided on an upper portion of a column 72 provided on the road surface 7. And the calculating part 3, the memory | storage part 4, the control part 5, and the operation detection part 6 are accommodated in the inside of the instrument main body 14. FIG. The input unit 2 includes the input terminal 21 and is provided on the support 72. The input terminal 21 includes a monitor, a switch, and the like, and is provided at a height that allows the user to easily operate while standing on the road surface 7. In addition, as shown in FIGS. 13A and 13B, the illumination unit 1 includes LEDs 12 d and 12 e mounted on the spherical surface of the instrument main body 14 to constitute a plurality of light source units 11.

  In addition, there is a building 8 in the vicinity of the lighting device (street light A), and light emitted from another lighting device 81 provided in the building 8 leaks from the building opening 82.

  The user measures the external adaptation brightness of each area 71 using an illuminometer while the illumination unit 1 is turned off at night and the other illumination devices 81 are turned on. Then, the user operates the input terminal 21 to input measurement results, and stores external data in the storage unit 4.

  Moreover, the other illuminating device 81 is provided with the transmitter 83 which transmits the state signal which shows an own lighting state. The operation detection unit 6 receives the state signal transmitted by the transmitter 83 and detects the lighting state of the other lighting device 81 based on the state signal. Then, the calculation unit 3 refers to the storage unit 4 and adds the internal data and the external data corresponding to the detection result of the operation detection unit 6 to derive the total adaptive luminance of each area 71. Then, the calculation unit 3 determines the adaptation state of each area 71 from the derivation result, and instructs the control unit 5 to turn on the high color temperature LED 12d or the low color temperature LED 12e. The control unit 5 turns on the high color temperature LED 12 d or the low color temperature LED 12 e for each light source unit 11 based on an instruction from the calculation unit 3.

  Further, the input unit 2 may be configured by a camera 22 provided on a support 72 as shown in FIG. The camera 22 images each area 71. Then, the calculation unit 3 performs image processing on the imaging data of the camera 22 to derive the external adaptation luminance of each area 71 and stores it in the storage unit 4 as external data. Subsequent control is the same as described above, and will be omitted.

DESCRIPTION OF SYMBOLS 1 Illumination part 2 Input part 3 Calculation part 4 Memory | storage part 5 Control part 6 Operation | movement detection part 11 Light source part 12a Blue LED
12b Green LED
12c Red LED
13 Lighting circuit

Claims (5)

Illuminating unit comprising a plurality of light source units that irradiate light for each area obtained by dividing a predetermined range into a plurality of parts and make the wavelength configuration of the light variable;
An operation detecting unit for detecting a lighting state of another illumination device that irradiates light to the area;
The first data indicating the brightness of each area by only the light emitted by the light source unit, and the brightness of each area by only the light emitted by the other illumination device for each lighting state of the other illumination device. A storage unit storing second data indicating
Based on the sum of the first data and the second data corresponding to the detection result of the operation detection unit, the ratio of the long wavelength component and the short wavelength component of the light emitted by the light source unit for each area A computing unit for computing
An illumination device comprising: a control unit that controls a wavelength configuration of light that the light source unit irradiates to the area based on a calculation result for each area of the calculation unit. The light source unit includes a high color temperature light source having a high color temperature and a low color temperature light source having a low color temperature with respect to the high color temperature light source.
The control unit controls the wavelength configuration of light emitted from the light source unit by performing dimming control on the high color temperature light source and the low color temperature light source based on a calculation result of the calculation unit. The lighting device according to claim 1. The light source unit includes a high color temperature light source having a high color temperature and a low color temperature light source having a low color temperature with respect to the high color temperature light source.
The control unit is configured to turn on only one of the high color temperature light source and the low color temperature light source based on a calculation result of the calculation unit, thereby configuring a wavelength configuration of light emitted by the light source unit. The lighting device according to claim 1, wherein the lighting device is controlled.   The light source unit includes a plurality of the high color temperature light sources and a plurality of the low color temperature light sources, and the high color temperature light sources and the low color temperature light sources are alternately mounted. The lighting device according to claim 2 or 3. The illumination unit has a mounting surface on which the light source unit is mounted,
The lighting device according to claim 1, wherein the mounting surface is formed in a curved surface.

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