JP6799804B2 - Lighting equipment and lighting systems equipped with it, mobile objects - Google Patents

Description

The present invention relates to a lighting device, a lighting system provided with the lighting system, and a moving body, and particularly includes a lighting device for detecting the amount of light of a light source with a sensor and controlling the lighting of the light source based on the detected detection result. Regarding lighting systems and moving objects.

Today, a lighting device has been developed in which the amount of light from a light source is detected by a sensor and the lighting of the light source is controlled based on the detected detection result.

As a configuration that can be used for this type of lighting device, for example, a configuration including a plurality of LED (Light Emitting Diode) chips, one light detection element as a sensor, a plurality of switching elements, and a control unit. Is known (see, for example, Patent Document 1).

The photodetector of Patent Document 1 detects light emitted from a plurality of LED chips having different emission colors. The switching element is inserted in the power supply path to each LED chip. The control unit adjusts the light output of each LED chip separately by performing PWM control of each switching element based on the output of the light detection element. The control unit generates a PWM signal in which the color mixing period in which all the LED chips are lit and the monitoring period in which only one LED chip to be monitored by the photodetector is lit are alternately displayed in time series. ..

In the configuration of Patent Document 1, by sequentially switching the LED chips that are lit as monitoring targets, the light of the LED chips of each emission color is accurately detected, and the light output of the LED chips is adjusted.

JP-A-2009-206186

By the way, the lighting device is required to have a configuration with less variation in light output, and it is not enough to use the configuration of Patent Document 1 described above, and further improvement is required.

An object of the present invention is to provide a lighting device having less variation in light output, a lighting system provided with the lighting device, and a moving body.

The lighting device of one aspect of the present invention includes a light source, a sensor, and a control unit. The sensor detects the amount of light from the light source. The control unit controls the lighting of the light source. The light source has a first light source and a second light source. The control unit repeats a plurality of cycles with the set of the first period and the second period as one cycle, and the light of the first light source and the combined light of the light of the second light source in the plurality of cycles are combined. The lighting of the light source is controlled so that the same light output is obtained. In the first period, the sensor radiates light only to the first light source or the second light source, which is the light source to be detected for detecting the amount of light. In the second period, light is emitted to the first light source and the second light source. The sensor outputs a detection value obtained by separately detecting the amount of light of the first light source in the first period and the amount of light of the second light source in the first period. Based on the detection result, the control unit further controls the lighting of the first light source and the second light source separately so that the amount of light of the light source falls within the target range. The detection result corresponds to a dimming signal in which the detection value is multiplied by a correction coefficient obtained from the value detected at a predetermined number of times.
The lighting device of one aspect of the present invention includes a light source, a sensor, and a control unit. The sensor detects the amount of light from the light source. The control unit controls the lighting of the light source. The light source has a first light source and a second light source. The control unit repeats a plurality of cycles with the set of the first period and the second period as one cycle, and the light of the first light source and the combined light of the light of the second light source in the plurality of cycles are combined. The lighting of the light source is controlled so that the same light output is obtained. In the first period, the sensor radiates light only to the first light source or the second light source, which is the light source to be detected for detecting the amount of light. In the second period, light is emitted to the first light source and the second light source. The sensor outputs a detection value obtained by separately detecting the amount of light of the first light source in the first period and the amount of light of the second light source in the first period. Based on the detection result, the control unit further raises the light amount of the light source so that it falls within the target range.
The lighting of the first light source and the second light source is controlled separately. The detection result corresponds to the value detected in a predetermined number of times. The control unit shifts the timing of starting the radiation of light only to the light source to be detected detected by the sensor and the timing of starting the radiation of light from the remaining light sources within the one cycle. Control the phase difference. The control unit gradually increases the phase difference over two or more of the plurality of cycles.

The lighting system of one aspect of the present invention includes one or more of the above-mentioned lighting devices and a control device. The control device is configured to be able to control the drive of the lighting device. The lighting device further includes a communication unit that communicates with the control device. The communication unit transmits the detected value to the control device in response to a request from the control device.

The moving body of one aspect of the present invention includes the above-mentioned lighting system and a main body. The main body is equipped with the lighting system.

The lighting device of the present invention can be configured with less variation in light output.

The lighting system and the moving body of the present invention can be configured to include a lighting device having less variation in light output.

FIG. 1 is a circuit configuration diagram showing a lighting system including the lighting device of the first embodiment. FIG. 2 is a graph illustrating the first period and the second period in the first embodiment. FIG. 3 is an explanatory diagram for explaining the detection result in the first embodiment. FIG. 4 is a graph illustrating another first period and a second period of the first embodiment. FIG. 5 is an exploded perspective view showing the same lighting device. FIG. 6 is a perspective view showing the same lighting device. FIG. 7 is a cross-sectional view showing a cross section of XX in FIG. FIG. 8 is a partially broken cross-sectional view showing the moving body according to the first embodiment. FIG. 9 is a graph illustrating the first period and the second period in the second embodiment. FIG. 10 is an explanatory diagram for explaining the detection result in the second embodiment. FIG. 11 is a circuit configuration diagram showing a lighting system including the lighting device of the third embodiment. FIG. 12 is a block diagram showing a lighting system according to the third embodiment. FIG. 13 is an exploded perspective view showing the same lighting device. FIG. 14 is a partially broken perspective view showing the moving body according to the third embodiment. FIG. 15 is a circuit configuration diagram showing the lighting system according to the fourth embodiment. FIG. 16 is a circuit configuration diagram showing the lighting system according to the fifth embodiment. FIG. 17 is a block diagram showing the same lighting system.

(Embodiment 1)
Hereinafter, the lighting device 10 of the present embodiment will be described with reference to FIGS. 1 to 7. The lighting system 20 according to the present embodiment will be described with reference to FIGS. 1 and 3, and the moving body 30 will be described with reference to FIG. In the drawings, the same members are designated by the same reference numerals and overlapping description will be omitted. The size and positional relationship of the members shown in each drawing may be exaggerated for the sake of clarity. In the following description, each element constituting the present embodiment may be a mode in which a plurality of elements are composed of one member and a plurality of elements are combined in one member, or a plurality of functions of one member may be used. It may be realized by sharing the members.

As shown in FIG. 1, the lighting device 10 of the present embodiment includes a light source 1a, a sensor 2, and a control unit 3. The sensor 2 detects the amount of light from the light source 1a. The control unit 3 controls the lighting of the light source 1a. The light source 1a has a first light source 1f and a second light source 1s. The light source 1a has two or more types having different emission colors. The light source 1a includes at least a first light source 1f and a second light source 1s. In FIG. 1, as two or more types of light sources 1a having different emission colors, a red LED1a1 that emits red light, a green LED1a2 that emits green light, a blue LED1a3 that emits blue light, and a white LED1a4 that emits white light. And is illustrated. In other words, the first light source 1f is the red LED 1a1, and the second light source 1s is the white LED 1a4.

The control unit 3 repeats a plurality of cycles with the set of the first period and the second period as one cycle, and the combined light of the light of the first light source 1f and the light of the second light source 1s in each of the plurality of cycles is generated. The lighting of the light source 1a is controlled so that the same light output is obtained. Here, the synthetic light refers to light in a substantially uniform state when viewed from the human eye by combining the light of the first light source 1f and the light of the second light source 1s.

In the first period, the sensor 2 radiates light only to the first light source 1f or the second light source 1s, which is the light source 1a to be detected to detect the amount of light. In other words, in the lighting device 10 of the present embodiment, as shown in FIG. 2, the first period is a monochromatic period in which light is radiated only to one type of light source 1a among two or more types of light sources 1a.

In the second period, light is emitted to the first light source 1f and the second light source 1s. In other words, in the lighting device 10 of the present embodiment, the second period is a color mixing period in which light is radiated to two or more types of light sources 1a. That is, the control unit 3 controls the lighting of the two or more types of light sources 1a so that the mixed colors of the two or more types of light in the plurality of cycles have the same light color.

In FIG. 2, a period from time t1 to time t4 is illustrated as one cycle, a monochromatic period in which light is radiated only to the red LED1a1 from time t1 to time t2 is shown, and a color mixing period from time t2 to time t4 is shown. Is shown. Hereinafter, the monochromatic period in which light is radiated only to the red LED 1a1 is also referred to as a first monochromatic period T1. In FIG. 2, for example, when detecting red light, one type of light source 1a is illustrated as a red LED1a1, and two or more types of light sources 1a are exemplified as a red LED1a1, a green LED1a2, a blue LED1a3, and a white LED1a4. Similarly, one cycle is shown from time t5 to time t8, a monochromatic period in which light is emitted only to the green LED1a2 from time t5 to time t6 is shown, and a color mixing period is shown from time t6 to time t8. Shown. Hereinafter, the monochromatic period in which light is radiated only to the green LED1a2 is also referred to as a second monochromatic period T2. From time t9 to time t12, one cycle is shown, from time t9 to time t10 shows a monochromatic period in which light is radiated only to the blue LED1a3, and from time t10 to time t12 shows a color mixing period. Hereinafter, the monochromatic period in which light is emitted only to the blue LED 1a3 is also referred to as a third monochromatic period T3. From time t13 to time t16, one cycle is shown, from time t13 to time t14 shows a monochromatic period in which light is radiated only to the white LED1a4, and from time t14 to time t16 shows a color mixing period. Hereinafter, the monochromatic period in which light is emitted only to the white LED 1a4 is also referred to as a fourth monochromatic period T4. In each cycle, the mixed color light of the red LED1a1, the green LED1a1, the blue LED1a3, and the white LED1a4 can be recognized by the human eye as the same light color. Here, the same light color includes not only the case where the colors of the mixed color light emitted from the lighting device 10 are completely matched, but also the case where a person cannot substantially distinguish the difference in light color.

The sensor 2 outputs detection values obtained by separately detecting the amount of light of the first light source 1f in the first period and the amount of light of the second light source 1s in the first period. That is, the sensor 2 outputs a detection value obtained by detecting the amount of light of one type of light source 1a during the monochromatic period. Further, as shown in FIG. 3, the control unit 3 separately controls the lighting of the first light source 1f and the second light source 1s so that the amount of light of the light source 1a falls within the target range based on the detection result. .. It can be said that the control unit 3 controls the lighting of two or more types of light sources 1a separately so that the amount of light of the light source 1a falls within the target range based on the detection result. The detection result depends on the value detected in a predetermined number of times.

In FIG. 3, the integrated value of the detected values obtained by the sensor 2 continuously detecting the amount of red light 10 times during the first monochromatic period T1 in which light is radiated only to the red LED 1a1 in one cycle is the integrated value of the red LED 1a1. It is the detection result. In FIG. 3, the color mixing period in one cycle is omitted. Similarly, in FIG. 3, the integrated value of the detected values obtained by the sensor 2 continuously detecting the amount of green light 10 times during the second monochromatic period T2 in which the light is emitted only to the green LED 1a2 in one cycle is calculated. It is the detection result of the green LED1a2. In FIG. 3, the integrated value of the detected values obtained by the sensor 2 continuously detecting the amount of blue light 10 times during the third monochromatic period T3 in which light is emitted only to the blue LED1a3 in one cycle is the integrated value of the blue LED1a3. It is the detection result. In FIG. 3, the integrated value of the detected values obtained by the sensor 2 continuously detecting the amount of white light 10 times during the fourth monochromatic period T4 in which the light is emitted only to the white LED 1a4 in one cycle is the value of the white LED 1a4. It is the detection result.

In the lighting device 10 of the present embodiment, the control unit 3 has a configuration in which the lighting of the light source 1a is separately controlled based on the detection result corresponding to the value detected in a predetermined number of times, and the color variation is further reduced. it can.

Hereinafter, the configuration of the lighting system 20 including the lighting device 10 of the present embodiment will be described with reference to FIG. The lighting system 20 includes one or more lighting devices 10 and a control device 21. FIG. 1 illustrates one lighting device 10. The control device 21 is configured to be able to control the drive of the lighting device 10. The lighting device 10 further includes a communication unit 3c that communicates with the control device 21. It is preferable that the communication unit 3c is configured so that the detected value can be transmitted to the control device 21 in response to a request from the control device 21.

In the lighting system 20 according to the present embodiment, it is preferable that the communication unit 3c is configured to transmit the detected value after the light source 1a is turned on for a predetermined time. In the lighting system 20, the communication unit 3c transmits the detection value after the light source 1a is lit for a predetermined time, so that the sensor 2 can be detected at an appropriate time when the lighting of the light source 1a is stable. It can be carried out. The lighting device 10 is electrically connected to the external power source 22 so that the light source 1a can be supplied with electric power. The control device 21 has a calculation function for integrating the detected values transmitted from the lighting device 10. The control device 21 is configured to be able to transmit a detection result corresponding to a value obtained by integrating a plurality of detection values detected by the sensor 2 to the lighting device 10. The control device 21 is composed of a personal computer driven by an appropriate program.

The lighting device 10 includes a housing 4 and an optical member 5 as shown in FIGS. 5 to 7, in addition to the light source 1a, the sensor 2 and the control unit 3 shown in FIG. The light source 1a, the sensor 2, and the control unit 3 are integrally formed with the mounting substrate 1b to form a part of the light source unit 10a. In FIGS. 5 to 7, the control unit 3 is omitted.

In the lighting device 10, as shown in FIG. 5, a plurality of LED groups 1g are mounted on a long mounting substrate 1b. In each of the plurality of LED groups 1g, four types of light sources 1a having different emission colors are grouped together. The LED group 1g includes four types of light sources 1a having different emission colors as LEDs, one type each of a red LED 1a1, a green LED 1a2, a blue LED 1a3, and a white LED 1a4. The four types of LEDs are linearly arranged in the central portion of the mounting board 1b in the lateral direction along the longitudinal direction of the mounting board 1b. In one LED group 1g, four types of LEDs are arranged at substantially equal intervals from each other. The plurality of LED groups 1g are arranged at predetermined intervals. The plurality of LEDs are not limited to the configuration in which they are arranged linearly. In each LED group 1g, the plurality of LEDs may be arranged in a configuration other than the linear shape, for example, the four LEDs are arranged so as to be arranged in a 2 × 2 matrix.

The two or more types of light sources 1a having different emission colors are not limited to the four types of red LED1a1, green LED1a2, blue LED1a3, and white LED1a4. The two or more types of light sources 1a having different emission colors may be, for example, only three types of a cyan LED that emits cyan light, a magenta LED that emits magenta light, and a yellow LED that emits yellow light.

The LED may have, for example, a configuration including an LED chip, a package provided with a recess for accommodating the LED chip, and a translucent sealing material for sealing the recess. The LED may be, for example, a surface mount type light emitting diode including an LED chip, a package, and a sealing material, or may be a single LED chip alone. In the lighting device 10, LEDs of the same type having the same emission color are pre-classified LEDs having the same color rank so that light of substantially the same color can be emitted with the same current. The lighting device 10 uses LEDs of the same rank for each emission color, and is configured so that the colors for each emission color of the LEDs are aligned in one lighting device 10. The light source 1a is not limited to a configuration using an LED. The light source 1a may be configured to use a discharge lamp such as an organic EL element or a fluorescent lamp instead of the LED.

The mounting substrate 1b has an outer shape of a rectangular flat plate. A glass epoxy resin substrate is used as the mounting substrate 1b. The mounting substrate 1b is not limited to the glass epoxy resin substrate. The mounting substrate 1b may be, for example, a metal substrate provided with wiring having a predetermined shape via an insulating layer. The mounting board 1b is electrically connected in series for each LED of the same type of emission color by using wiring having a predetermined shape so that each LED emitting the same light emission color can be turned on. The mounting board 1b is provided with a connector 1c so that power can be supplied to each LED of the same type of emission color. The number of LEDs having the same emission color may be one or a plurality.

The sensor 2 is configured to be able to detect the amount of light for each LED having a different emission color. The sensor 2 is provided on the mounting board 1b. As shown in FIGS. 5 and 7, the sensor 2 includes a sensor element 2a, a first cover 2d, a light guide member 2c, and a second cover 2b.

The sensor element 2a is mounted on the mounting board 1b. The sensor element 2a has a photodiode with an optical filter. The sensor element 2a has at least three photodiodes. The three photodiodes have different optical filters from each other. Optical filters transmit light of different colors. Different optical filters selectively transmit, for example, either red light, green light, or blue light.

The sensor element 2a can detect the amount of light of each of the light sources 1a having different emission colors by each of the three photodiodes corresponding to the optical filters of each color. The sensor element 2a converts the light radiated from the light source 1a into an electric signal, and outputs the converted electric signal. The sensor element 2a has sensitivity to red light, green light, and blue light, and is configured to output a detected value as a 16-bit digital value for each color. The sensor element 2a can output the detected values of the amount of red light, the amount of green light, and the amount of blue light as serial data. Sensor element 2a can be a color sensor corresponding to the ^{I 2 C (Inter-Integrated Circuit} ) interface.

The first cover 2d is attached to the mounting board 1b. The first cover 2d is configured to hold the light guide member 2c. The first cover 2d is arranged close to the light source 1a and the sensor element 2a. The first cover 2d is made of a resin material such as an epoxy resin. The first cover 2d is preferably made of black resin. When the first cover 2d is made of black resin, it suppresses that the light from the light source 1a that guides the light guide member 2c is affected by external light, reflected light reflected by the mounting substrate 1b, and the like. it can.

The light guide member 2c is configured to be housed in a recess of the first cover 2d. The light guide member 2c is configured so that light from each of the light sources 1a having different emission colors mounted on the mounting substrate 1b can be guided to the sensor element 2a.

As shown in FIG. 5, the light guide member 2c includes a first light receiving unit 2c1, a second light receiving unit 2c2, a third light receiving unit 2c3, and a fourth light receiving unit 2c4. The first light receiving unit 2c1 is provided so as to face the red LED 1a1. The second light receiving unit 2c2 is provided so as to face the green LED 1a2. The third light receiving unit 2c3 is provided so as to face the blue LED 1a3. The fourth light receiving unit 2c4 is provided so as to face the white LED 1a4. The light guide member 2c is configured to be able to irradiate the light receiving surface of the sensor element 2a with the red light incident from the first light receiving unit 2c1. The light guide member 2c is configured to be able to irradiate the light receiving surface of the sensor element 2a with green light incident from the second light receiving unit 2c2. The light guide member 2c is configured to be able to irradiate the light receiving surface of the sensor element 2a with blue light incident from the third light receiving unit 2c3. The light guide member 2c is configured to be able to irradiate the light receiving surface of the sensor element 2a with white light incident from the fourth light receiving unit 2c4. The light guide member 2c is made of acrylic resin. The light guide member 2c is not limited to the structure formed of acrylic resin. The light guide member 2c may be made of a translucent resin such as a polycarbonate resin. The light guide member 2c is not limited to the translucent resin, and may be formed by using glass. The light guide member 2c is formed in an appropriate shape. The second cover 2b is provided so as to cover the light guide member 2c. The second cover 2b can be formed of a constituent material such as an epoxy resin. The second cover 2b is preferably made of black resin. When the second cover 2b is made of black resin, it is possible to suppress the light from the light source 1a that guides the light guide member 2c from being affected by the external light.

As shown in FIG. 1, the control unit 3 includes a drive control unit 3a, a lighting circuit 3b, a communication unit 3c, and a drive power supply unit 3d. The drive control unit 3a is configured to be able to output a control signal for controlling the lighting circuit 3b. Examples of the control signal include a PWM (Pulse Width Modulation) signal corresponding to the on-duty ratio. The drive control unit 3a can flow a predetermined current to the light source 1a by controlling the on and off of the switching element constituting the lighting circuit 3b by the PWM signal. The drive control unit 3a is configured to be able to individually control the outputs of two or more types of light sources 1a having different emission colors. In other words, the drive control unit 3a is configured so that each of the red LED 1a1, the green LED 1a2, the blue LED 1a3, and the white LED 1a4 can be individually dimmed and controlled. The drive control unit 3a can separately acquire the amount of red light, the amount of green light, and the amount of blue light based on the detected value output from the sensor 2.

The drive control unit 3a is composed of, for example, a microcomputer provided with a CPU (Central Processing Unit). The microcomputer can perform a predetermined control operation by executing an appropriate program stored in the built-in storage unit 3a1. The storage unit 3a1 is composed of an electrically rewritable non-volatile semiconductor memory. Examples of the non-volatile semiconductor memory include a flash memory and an EEPROM (Electrically Erasable and Programmable Read Only Memory). The storage unit 3a1 may store a correction coefficient for correcting the light output of the light source 1a. The correction coefficient includes, for example, a correction value that modulates the pulse width of the PWM signal so that the light amount of the light source 1a detected by the sensor 2 becomes a predetermined light amount.

The lighting circuit 3b is configured so that the light output of the light source 1a can be adjusted. The lighting circuit 3b includes a first lighting circuit 3b1, a second lighting circuit 3b2, a third lighting circuit 3b3, and a fourth lighting circuit 3b4. The first lighting circuit 3b1 is configured to be able to control the lighting of the red LED 1a1. The second lighting circuit 3b2 is configured to be able to control the lighting of the green LED 1a2. The third lighting circuit 3b3 is configured to be able to control the lighting of the blue LED 1a3. The fourth lighting circuit 3b4 is configured to be able to control the lighting of the white LED 1a4. The first lighting circuit 3b1, the second lighting circuit 3b2, the third lighting circuit 3b3, and the fourth lighting circuit 3b4 have basically the same configuration. The lighting device 10 is configured so that each of the red LED 1a1, the green LED 1a2, the blue LED 1a3, and the white LED 1a4 can emit mixed-color light of an arbitrary light color by supplying power from the lighting circuit 3b. The lighting device 10 adjusts the ratio of the light outputs of the red LED 1a1, the green LED 1a2, and the blue LED 1a3, so that the emitted light becomes white light. Hereinafter, the configuration of the first lighting circuit 3b1 will be mainly described.

The first lighting circuit 3b1 includes a step-down chopper circuit and a drive circuit. The step-down chopper circuit includes a switching element. The drive circuit controls the on and off drive of the switching element. The first lighting circuit 3b1 is composed of a step-down chopper circuit and a drive circuit to form a switching power supply circuit. The first lighting circuit 3b1 steps down the DC voltage from the external power supply 22 to a drive voltage suitable for the series circuit of the plurality of red LEDs 1a1 constituting the light source 1a. The first lighting circuit 3b1 can increase or decrease the light output of the red LED 1a1 according to the duty ratio of the switching element. The first lighting circuit 3b1 can collectively control a plurality of red LEDs 1a1 connected in series.

The communication unit 3c is configured to be able to communicate with each other with the control device 21 provided outside the lighting device 10. The communication unit 3c is configured to be able to transmit information on the light color of the light radiated from the lighting device 10 and the correction coefficient for reducing the color variation among the plurality of lighting devices 10 to the control unit 3. The communication unit 3c is composed of, for example, an RS-485 transceiver. The RS-485 transceiver can transmit and receive RS-485 signals in accordance with the communication standards of the Electronic Industries Alliance.

The drive power supply unit 3d is configured to be able to supply electric power for driving to the drive control unit 3a, the lighting circuit 3b, and the communication unit 3c. The drive power supply unit 3d is configured so that, for example, the power from the external power supply 22 can be divided by a series circuit of two resistors to supply a predetermined drive power.

As shown in FIGS. 5 to 7, the housing 4 includes a body 4a, an end face plate 4b, and a fixing screw 4c. The housing 4 has a long outer shape. The housing 4 is configured to hold the light source unit 10a and the optical member 5.

The body 4a includes a bottom plate 4a1 and a side plate 4a2. The bottom plate 4a1 has a rectangular outer shape in a plan view. The bottom plate 4a1 is provided with a notch portion 4k. The bottom plate 4a1 is configured so that both ends in the longitudinal direction are notched by the notch portion 4k. The side plates 4a2 are provided so as to project along the longitudinal direction of the bottom plate 4a1 from both ends of the bottom plate 4a1 in the lateral direction in the thickness direction of the bottom plate 4a1. The pair of side plates 4a2 are arranged so as to face each other. The side plate 4a2 is provided with a pair of ribs 4d at the tip opposite to the bottom plate 4a1. The rib 4d is provided so as to extend from the tip end portion of the side plate 4a2 toward the inside of the housing 4 along the thickness direction of the side plate 4a2. The rib 4d is provided along the longitudinal direction of the housing 4. The flange portion 5b of the optical member 5 is inserted into the groove portion 4da formed by the pair of ribs 4d so that the optical member 5 can be held. As shown in FIGS. 5 and 7, the body 4a has a C-shaped outer shape with the bottom plate 4a1 and the pair of side plates 4a2 in a cross-sectional view along a direction orthogonal to the longitudinal direction. Both ends of the body 4a are open in the longitudinal direction, and a flat plate-shaped end face plate 4b is provided so as to close the openings.

The housing 4 includes an opening 4aa. The opening 4aa is provided so as to be surrounded by the bottom plate 4a1, the pair of side plates 4a2, and the pair of end face plates 4b. The housing 4 is configured so that the opening 4aa is closed by the optical member 5. The housing 4 is formed so that the light source unit 10a can be housed inside. The housing 4 is configured so that the light source unit 10a can be screwed and fixed to the bottom plate 4a1 by screws, for example.

As shown in FIG. 7, the body 4a includes a screw holding portion 4e. The screw holding portion 4e has a C-shaped outer shape in cross section. The screw holding portions 4e are provided at both ends of the bottom plate 4a1 on the back surface side opposite to the front surface side on which the side plates 4a2 protrude. The screw holding portion 4e is configured so that the fixing screw 4c through which the end face plate 4b is inserted is screwed. The body 4a includes a pair of legs 4f. The legs 4f are provided along the longitudinal direction of the body 4a. The leg portion 4f has an L-shaped outer shape in a cross-sectional view orthogonal to the longitudinal direction. The leg portion 4f projects in the direction away from the bottom plate 4a1 along the thickness direction of the bottom plate 4a1 of the body 4a. The pair of legs 4f are configured so that their tips are separated from each other. A plurality of through holes may be formed in the leg portion 4f so that the lighting device 10 can be screwed and held by the held body to be held.

The optical member 5 is configured to allow light from the light source 1a to pass through. The optical member 5 is made of a translucent material. Examples of the translucent material include acrylic resin, epoxy resin and glass. The optical member 5 has a lens 5a on a surface facing the light source 1a. The lens 5a is configured so that the light from the light source 1a can be emitted to the outside of the housing 4 with a predetermined light distribution characteristic. The lens 5a can be composed of, for example, a Fresnel lens. The optical member 5 is formed in a long outer shape of a flat plate. The optical member 5 has a pair of collar portions 5b along the longitudinal direction at both ends in the lateral direction. The pair of flange portions 5b are provided so as to extend outward from each of both ends of the optical member 5 in the lateral direction. The optical member 5 is configured such that the flange portion 5b is slidably inserted into the groove portion 4da formed of a pair of ribs 4d provided along the longitudinal direction of the body 4a. The optical member 5 is configured so that it can be attached to and detached from the body 4a.

When assembling the lighting device 10, the light source unit 10a and the optical member 5 are inserted into the body 4a from the opened end of the body 4a. The opening of the lighting device 10 is closed by the end face plate 4b after the light source unit 10a and the optical member 5 are housed in the body 4a. The end face plate 4b is screwed to the screw holding portion 4e of the body 4a by the fixing screw 4c.

Hereinafter, the aircraft 30a shown in FIG. 8 will be described as the moving body 30 provided with the lighting device 10 of the present embodiment. In the aircraft 30a, the lighting device 10 is provided in the passenger compartment 30aa. The aircraft 30a is provided with a control device 21 in the cockpit, for example. The control device 21 is configured to be able to control the lighting device 10 provided in the guest room 30aa. The aircraft 30a includes a plurality of lighting devices 10. In the aircraft 30a, a plurality of lighting devices 10 are arranged linearly in the longitudinal direction along the front-rear direction. The aircraft 30a constitutes a main body on which the lighting system 20 is mounted. That is, it is preferable that the moving body 30 according to the present embodiment includes a lighting system 20 and a main body on which the lighting system 20 is mounted. The moving body 30 is not limited to the aircraft 30a, and may be, for example, a vehicle that is movable by a linear motor.

In the moving body 30 according to the present embodiment, as shown in FIG. 8, for example, the lighting device 10 is provided above the passenger compartment 30aa in the aircraft 30a provided with the two rows of passages 30b. In the aircraft 30a, a seat 31 on the window 30e side is provided between the aisle 30b and the window 30e, and a seat 31 on the aisle 30b side is provided between the two aisles 30b.

Each of the seats 31 is provided with three sets of two rows of seats 31 arranged along the left-right direction of the aircraft 30a. In the aircraft 30a, a storage shelf 32 is provided on the upper side in the vertical direction corresponding to the seat 31 on the window side. The storage shelf 32 constitutes a long luggage compartment arranged along the front-rear direction of the aircraft 30a. The storage shelf 32 is arranged so as to be in contact with the ceiling material 30c above the seat 31.

The lighting device 10 is arranged so that the ceiling material 30c in the cabin 30a can be illuminated along the passage 30b extending along the front-rear direction of the aircraft 30a. The lighting device 10 is attached to the ceiling material 30c of the aircraft 30a, which is the held body, with the legs 4f fixed by screws or the like. The lighting device 10 is arranged so as not to be seen by passengers sitting in the seat 31.

Next, the operation of the lighting device 10 of the present embodiment will be described in more detail.

In recent years, lighting devices have become easy to reduce in size and weight by using a light source made of a solid-state light emitting element such as an LED or an organic EL element. A lighting device using a light source made of a solid-state light emitting element is also used for a moving body such as an aircraft as the size and weight of the lighting device are reduced. The aircraft is equipped with multiple lighting devices. When a plurality of LEDs are used as a light source in the lighting device, the light output varies among the plurality of lighting devices due to individual variation of each LED, aging deterioration of the LED, and difference in temperature characteristics of different types of LEDs. In some cases. In the lighting device, color variation occurs due to the variation in the light output of the light source. In the lighting device, the amount of light from the light source is detected by a sensor, and feedback control is performed so that the amount of light from the light source is kept within the target range, so that color variation among a plurality of lighting devices can be reduced.

However, in the lighting device, in order to reduce the color variation, if each light source having a different emission color is turned on and the amount of light is detected by the sensor, every time the correction for reducing the color variation is performed, the passengers of the aircraft feel uncomfortable. May occur.

Further, in the lighting device, even if the light from the light source is controlled and turned on so as to reduce the color variation between the plurality of lighting devices in advance, it is caused by the change in the ambient temperature and the temperature rise due to the lighting of the light source. Therefore, it may be necessary to correct the color variation again. In the lighting device, particularly when an LED is used as a light source, the green LED, the blue LED, and the white LED can be made to emit light with high brightness by having a structure in which a semiconductor material such as InGaN is used for the light emitting layer. The red LED can be made to emit light with high brightness by having a structure in which a semiconductor material such as AlInGaP or GaP is used for the light emitting layer. In lighting devices, the light output characteristics of red LEDs made of different semiconductor materials tend to be significantly different from those of green LEDs, blue LEDs, and white LEDs with respect to temperature changes.

Further, in a lighting device, as the number of light sources having different emission colors increases, the detection time for the sensor to detect the light amount of the light source becomes shorter, and it tends to be difficult to accurately detect the light amount of the light source.

Therefore, in the lighting device 10 of the present embodiment, for example, at the time of factory shipment of the lighting device 10, the drive control unit 3a controls the lighting circuit 3b in advance so that color variation does not occur among the plurality of lighting devices 10. It is configured so that the control signal to be corrected can be corrected. The illuminating device 10 can be corrected so that the color variation among the plurality of illuminating devices 10 is reduced by using a spectroscope that measures the emitted light. The correction is performed by comparing, for example, the chromaticity of the lighting device 10 based on the amount of light of the light source 1a detected by the sensor 2 with the chromaticity measured by the spectroscope. In the lighting device 10, a correction coefficient such that the chromaticity based on the amount of light detected by the sensor 2 and the chromaticity by the spectroscope match is stored in the storage unit 3a1 of the drive control unit 3a. The correction coefficient can be calculated by, for example, a computer connected to the spectroscope and the sensor 2 of the lighting device 10. The computer calculates a correction coefficient so that the amount of light detected by the sensor 2 becomes a predetermined value.

In the lighting device 10, the control unit 3 corrects the lighting of each of two or more types of light sources 1a having different emission colors by a correction coefficient so that the light of the light color based on the dimming signal from the control device 21 can be emitted. It is controlled by a PWM signal. In the lighting device 10 of the present embodiment, the initial color variation among the plurality of lighting devices 10 is reduced in advance by correction using a spectroscope.

The lighting device 10 corrects the dimming signal by using a correction coefficient so that light of the light color corresponding to the dimming signal from the control device 21 can be emitted, and a predetermined duty ratio for each light source 1a having a different emission color. The lighting of the light source 1a is controlled by passing the current of.

Next, in the lighting device 10 of the present embodiment, the control for further reducing the color variation will be described. The lighting device 10 is configured so that the color variation that occurs between the plurality of lighting devices 10 can be corrected at regular intervals to reduce the color variation that occurs between the plurality of lighting devices 10. doing. By correcting the amount of light of the light source 1a at regular intervals, the lighting device 10 can reduce variations in the light output of the emitted light even after being attached to the moving body 30, for example.

In the lighting device 10, the sensor 2 detects the amount of light from the light source 1a for each of two or more types of light sources 1a having different emission colors, and outputs the detected detection value to the drive control unit 3a. In the lighting device 10 of the present embodiment, for example, 13.7% of one cycle of the PWM signal is a monochromatic period, and the remaining 86.3% of one cycle is a mixing period.

In the lighting device 10, in order to light the light source 1a of the emission color to be detected detected by the sensor 2, the micro that constitutes the drive control unit 3a while keeping the set value of the duty ratio corresponding to the dimming signal from the control device 21 as it is. Store in a computer register. In the illuminating device 10, the sensor 2 does not detect the amount of light of the light source 1a to be detected when the duty is set to 13.7% or less in one cycle in the PWM signal.

In other words, in the lighting device 10 of the present embodiment, when the lighting period of the light source 1a to be detected in the first period is shorter than the preset detection time for detecting the detection value, the sensor 2 of the light source 1a to be detected It is preferable not to detect the amount of light.

When the lighting period of the light source 1a to be detected in the first period is shorter than the preset detection time for detecting the detection value, the lighting device 10 does not detect the light amount of the light source 1a to be detected by the sensor 2 for detecting the light amount. Therefore, it is possible to easily increase the detection sensitivity.

Since the lighting device 10 lights the light source 1a having a light emitting color other than the detection target detected by the sensor 2, the duty setting value corresponding to the dimming signal from the control device 21 is changed. In the lighting device 10, the changed duty setting value is stored in the register of the microcomputer constituting the drive control unit 3a. In the lighting device 10, the detection time detected by the sensor 2 is set in the register by adding the time corresponding to 13.7% of one cycle to the set value of the duty corresponding to the dimming signal in the light source 1a. Controls the lighting of.

In the lighting device 10, the control unit 3 shown in FIG. 4 starts emitting light only to the light source 1a to be detected by the sensor 2 for detecting the amount of light in one cycle, and the light from the remaining light source 1a. It is preferable to control the phase difference that shifts the timing of starting the radiation of the light source.

The lighting device 10 of the present embodiment has a relatively simple configuration for controlling the phase difference, and can maintain the total amount of light within one cycle.

The control unit 3 shifts the timing of starting lighting of the light sources 1a other than the detection target among the plurality of light sources 1a having different emission colors after the monochromatic period in which the detection of the light amount of the light source 1a to be detected is completed. In the lighting device 10, neither the light source 1a to be detected nor the on-duty ratio of the light source 1a other than the detection target is changed within one cycle. The sensor 2 detects the amount of light of only one type of light source 1a during the monochromatic period.

When the lighting device 10 of the present embodiment detects the amount of light of a predetermined light source 1a, even when all the light sources 1a having different emission colors are turned on, the timing of turning on the light source 1a to be detected and other than the detection target. The timing of turning on the light source 1a of the above is different.

The illuminating device 10 first turns on only the light source 1a to be detected to detect the amount of light, finishes the detection by the sensor 2, and then maintains the lighting of the light source 1a to be detected to be a light source other than the detection target. Start lighting 1a. In the lighting device 10, if the lighting time of the light source 1a to be detected and the light source 1a other than the detection target are the same, the light source 1a to be detected is lit first, so that the light source 1a to be detected is lit earlier than the light source 1a other than the detection target. Turn off first.

The lighting device 10 controls so that the on-duty ratios of all the LEDs do not change before and after the correction during the monochromatic period and the color mixing period for detecting the amount of light of the light source 1a. Even when a person visually recognizes the light from the lighting device 10, the lighting device 10 can make it impossible to recognize that only the light source 1a having a different emission color is lit. In the lighting device 10, even when a person visually recognizes the radiated light, it is possible to suppress the appearance of the radiated light changing in color. In the lighting device 10, the detection of the amount of light of one light source 1a among the plurality of light sources 1a has been described, but the amount of light of the other light sources 1a is also individually detected by the same procedure.

When the light amount of the light source 1a is detected by the sensor 2, the lighting device 10 has two types of different emission colors as long as the ratio of the on-duty ratio of each light source 1a is kept constant even if a single color period is provided. The light color of the mixed color light by the light of the light source 1a described above does not change from the case of the control without the monochromatic period.

In the lighting device 10 of the present embodiment, as shown in FIG. 3, the detection result is a value obtained by integrating the detection values of one cycle at a predetermined number of times. In FIG. 3, the detection values detected by the sensor 2 are integrated 10 times as a predetermined number of times. The predetermined number of times can be appropriately set depending on the optical detection accuracy of the sensor 2, the computing power for integrating the detected data, the accuracy for suppressing the variation in optical output, and the like. The lighting device 10 detects the red light from the red LED 1a1 10 times by the sensor 2 during the first monochromatic period T1 for detecting the amount of light of the red LED 1a1, and detects the added value obtained by adding the detected values of the 10 times. As a result, the lighting of the red LED 1a1 can be controlled. The lighting device 10 detects the green light from the green LED 1a2 10 times by the sensor 2 during the second monochromatic period T2 for detecting the amount of light of the green LED 1a2, and detects the added value obtained by adding the detected values of the 10 times. As a result, it is configured so that the lighting of the green LED 1a2 can be controlled. The lighting device 10 detects the blue light from the blue LED 1a3 10 times by the sensor 2 during the third monochromatic period T3 for detecting the amount of light of the blue LED 1a3, and detects the added value obtained by adding the detected values of the 10 times. As a result, the lighting of the blue LED 1a3 can be controlled. The lighting device 10 detects the white light from the white LED 1a4 10 times by the sensor 2 during the fourth monochromatic period T4 for detecting the amount of light of the white LED 1a4, and detects the added value obtained by adding the detected values of the 10 times. As a result, it is configured so that the lighting of the white LED 1a4 can be controlled.

The lighting device 10 of the present embodiment transmits a predetermined number of detection values detected by the sensor 2 to the control device 21 via the communication unit 3c. The control device 21 calculates a value obtained by integrating the detected values of a predetermined number of times as the correction coefficient. The control device 21 transmits the detection result using the calculated correction coefficient to the lighting device 10. The lighting device 10 controls the lighting of the light source 1a based on the detection result. The lighting system 20 is not limited to the configuration in which the control device 21 calculates the correction coefficient, and the drive control unit 3a of the lighting device 10 may calculate the correction coefficient. In the lighting device 10, the corrected duty ratio can be calculated and corrected by multiplying the value of the dimming signal by the correction coefficient. In the lighting device 10, the detected value is not limited to the value integrated in the predetermined number of times, but may be the average value of the detected values of the predetermined number of times, or the detected value of the predetermined number of times. It may be the maximum value.

When the control unit 3 detects the amount of light from the light source 1a, it is preferable that the control unit 3 controls the current to the light source 1a. For example, when the maximum on-duty ratio of the light source 1a is 86.3%, the lighting device 10 is emitted from the entire light source 1a when the amount of light is detected, if the maximum on-duty ratio at the time of lighting is 100%. The brightness of the mixed light is reduced by approximately 14%. In the lighting device 10, for example, the control unit 3 can be controlled to increase the current flowing through the LED 1a when detecting the amount of light, as compared with the current flowing through the LED 1a when not detected by the sensor 2. By increasing the current flowing through the LED 1a, the lighting device 10 can keep the brightness of the mixed color light emitted from the light source 1a constant before and after the detection of the amount of light.

(Embodiment 2)
The lighting device 10 of the present embodiment is mainly different in that the control of the first embodiment shown in FIGS. 2 and 4 is configured to perform the control shown in FIG. By appropriately changing the program stored in the storage unit 3a1 of the drive control unit 3a, the lighting device 10 can appropriately change the control of lighting the light source 1a and detecting the amount of light of the sensor 2. The lighting system 20 according to the present embodiment can be configured by changing the program with the configuration of the lighting system 20 shown in FIG. The same components as those in the first embodiment will be appropriately described by using the same reference numerals.

In the lighting device 10 of the present embodiment, the control unit 3 starts emitting light only to the light source 1a to be detected by the sensor 2 for detecting the amount of light in one cycle, and the light from the remaining light source 1a. The phase difference is controlled to shift the timing of starting radiation. In the lighting device 10, it is preferable that the control unit 3 gradually increases the phase difference over two or more cycles out of the plurality of cycles.

In the lighting device 10 of the present embodiment, the control unit 3 gradually increases the phase difference as compared with the configuration in which the timing of shifting the phase is controlled to be the same, thereby causing the light emitted from the lighting device 10 to flicker. , Can be suppressed.

Hereinafter, the control of the lighting device 10 of the present embodiment will be described in more detail.

In the lighting device 10, the control unit 3 separately controls the lighting of each of two or more types of light sources 1a having different emission colors based on the on-duty ratio of the PWM signal. The control unit 3 radiates light only to one type of light source 1a while maintaining a predetermined on-duty ratio within one cycle of the PWM signal during the monochromatic period. The control unit 3 emits the light source 1a of one type at the timing of starting the radiation of the light source 1a of the remaining type different from the light source 1a of one type while maintaining the on-duty ratio within one cycle of the PWM signal. Is controlled to shift from the timing to start. FIG. 9 shows an example in which the timing of shifting the phase is gradually increased over a plurality of periods. In FIG. 9, one cycle is shown from time t51 to time t53, time t54 to time t58, time t59 to time t63, and time t64 to time t67. In FIG. 9, the monochromatic period is shown from time t51 to time t52, time t54 to time t56, time t59 to time t61, and time t64 to time t65.

In the lighting device 10, as shown in FIG. 9, from time t51 to time t53, the timings at which the red LED1a1, the green LED1a2, the blue LED1a3, and the white LED1a4 start emitting light are the same and the phases are the same. There is no control to shift. The lighting device 10 starts the emission of the light of the red LED1a1 at the time t55 from the time t54 to the time t58, which is the next cycle from the time t51 to the time t53, and emits the light of the green LED1a2, the blue LED1a3, and the white LED1a4. Start at time t56. The lighting device 10 controls the phase difference of the green LED1a2, the blue LED1a3, and the white LED1a4 by accelerating the timing of starting the light emission of the red LED1a1. In the lighting device 10, the light emission of the red LED1a1 is started at the time t60 from the time t59 to the time t63, which is the next cycle from the time t54 to the time t58, and the light emission of the green LED1a2, the blue LED1a3, and the white LED1a4 is emitted. Start from time t61. The lighting device 10 further accelerates the timing of starting the emission of the light of the red LED1a1 with respect to the green LED1a2, the blue LED1a3, and the white LED1a4, and further increases the phase difference. In the lighting device 10, the light emission of the red LED1a1 is started at the time t64 from the time t64 to the time t67, which is the next cycle from the time t59 to the time t63, and the light emission of the green LED1a2, the blue LED1a3, and the white LED1a4 is emitted. Start from time t65. The lighting device 10 accelerates the timing at which the red LED1a1 starts emitting light with respect to the green LED1a2, the blue LED1a3, and the white LED1a4 to maximize the phase difference.

In the lighting device 10 of the present embodiment, it is preferable that the sensor 2 detects the amount of light of the light source 1a to be detected in the first period in one cycle having the largest phase difference.

In the lighting device 10, the sensor 2 can easily increase the detection sensitivity by detecting the amount of light of the light source 1a in the first period in one cycle having the largest phase difference.

In the lighting device 10 of the present embodiment, the sensor 2 detects the amount of light of the light source 1a to be detected when the lighting period of the light source 1a to be detected in the first period is shorter than the preset detection time for detecting the detection value. It is preferable not to do so.

When the lighting period of the light source 1a to be detected in the first period is shorter than the preset detection time for detecting the detection value, the lighting device 10 does not detect the light amount of the light source 1a to be detected by the sensor 2 for detecting the light amount. Therefore, it is possible to easily increase the detection sensitivity.

In the lighting device 10, when the lighting time of the light source 1a in the first period is shorter than the detection time of the sensor 2 determined in advance, the light output variation varies even if the light source 1a is not controlled by the detection value detected by the sensor 2. It is small and can simplify the arithmetic processing for integrating the detected values.

In the lighting device 10 of the present embodiment, unlike the first embodiment shown in FIG. 3, as shown in FIG. 10, the detection result is a value obtained by integrating the detection values of one cycle at a predetermined number of times. In FIG. 10, 10 times is illustrated as a predetermined number of times.

The lighting device 10 detects the amount of light of the red LED1a1 once in a single color period of one cycle for detecting the amount of light of the red LED1a1, and detects an integrated value obtained by integrating the detected values detected from each of the single color periods of each of a plurality of consecutive cycles. As a result, it is configured to control the lighting of the light source 1a. The lighting device 10 detects the amount of light of the green LED1a2 once in a single color period of one cycle for detecting the amount of light of the green LED1a2, and detects an integrated value obtained by integrating the detected values detected from each of the single color periods of each of a plurality of consecutive cycles. As a result, it is configured to control the lighting of the light source 1a. The lighting device 10 detects the amount of light of the blue LED1a3 once in a single color period of one cycle for detecting the amount of light of the blue LED1a3, and detects an integrated value obtained by integrating the detected values detected from each of the single color periods of each of a plurality of consecutive cycles. As a result, it is configured to control the lighting of the light source 1a. The lighting device 10 detects the amount of light of the white LED1a4 once in a single color period of one cycle for detecting the amount of light of the white LED1a4, and detects an integrated value obtained by integrating the detected values detected from each of the single color periods of each of a plurality of consecutive cycles. As a result, it is configured to control the lighting of the light source 1a.

In the lighting device 10, the sensor 2 detects the amount of light of the light source 1a in the order of red light, green light, blue light, and white light, and repeats the integration of the detected detection values a predetermined number of times to reduce color shift. It can be configured.

The lighting device 10 of the present embodiment may be configured by appropriately using the configuration of the lighting device 10 of the first embodiment. The lighting device 10 of the present embodiment can also be applied to the lighting system 20 and the moving body 30 as in the first embodiment.

(Embodiment 3)
In the lighting device 10 of the present embodiment shown in FIGS. 11 to 14, the sensor 2 of the first embodiment shown in FIG. 1 mainly detects the amount of light of the light source 1a in the lighting device 10 provided with the sensor 2. The main difference is that the amount of light of the lighting device 10 is also detected. In the following, the lighting system 20 according to the present embodiment will be described with reference to FIGS. 11, 12, and 14, and the moving body 30 will be described with reference to FIG. The same components as those of the first embodiment and the second embodiment will be described by using the same reference numerals.

In the lighting system 20 provided with the lighting device 10 of the present embodiment, a plurality of lighting devices 10 are arranged so as to be continuous. In FIGS. 11, 12 and 14, four examples of the plurality of lighting devices 10 are illustrated. Hereinafter, the four lighting devices 10 may be referred to as a first lighting device 10A, a second lighting device 10B, a third lighting device 10C, and a fourth lighting device 10D. The first illuminating device 10A is arranged adjacent to the second illuminating device 10B. The second lighting device 10B is arranged adjacent to the third lighting device 10C. The second lighting device 10B is arranged between the first lighting device 10A and the third lighting device 10C. The third illuminating device 10C is arranged adjacent to the fourth illuminating device 10D. The third illuminating device 10C is arranged between the second illuminating device 10B and the fourth illuminating device 10D. The first lighting device 10A, the second lighting device 10B, the third lighting device 10C, and the fourth lighting device 10D are formed in the same structure. Hereinafter, the lighting device 10 of the present embodiment will be described by taking the structure of the first lighting device 10A shown in FIG. 11 as an example.

In the lighting device 10 of the present embodiment, the sensor 2 is configured to be able to detect the amount of light of another lighting device 10. In FIGS. 11, 12 and 14, the sensor 2 of the first lighting device 10A is configured to be able to detect the amount of light of the second lighting device 10B by using the second lighting device 10B as another lighting device 10.

In the lighting device 10 of the present embodiment shown in FIG. 13, the sensor 2 of the first embodiment shown in FIG. 1 is provided in the central portion in the longitudinal direction of the long housing 4, whereas the sensor 2 is the housing. It is provided at one end in the longitudinal direction of 4. The housing 4 further includes a light receiving path portion 2c5. The light receiving path portion 2c5 is configured to guide light from another adjacent lighting device 10 to the sensor element 2a. The light receiving path portion 2c5 receives light from another incident lighting device 10 via the end face plate 4b and irradiates the light receiving surface of the sensor element 2a.

The housing 4 is provided with a window hole 4ba that penetrates in the thickness direction of the end face plate 4b so that light from another adjacent lighting device 10 can enter the inside. In the end face plate 4b, the window hole 4ba is sealed with a translucent window material 4g. The window material 4g is made of a translucent material. Examples of the translucent material of the window material 4 g include polycarbonate resin and acrylic resin. The end face plate 4b is not limited to the configuration provided with the window material 4g. The end face plate 4b may be configured such that the tip end portion of the light receiving path portion 2c5 is inserted into the window hole 4ba. The entire end face plate 4b may be made of a translucent material so that light from another adjacent lighting device 10 can enter the end face plate 4b.

In the lighting device 10, the light guided by the light receiving path portion 2c5 depends on the light emitted by the light source 1a in another adjacent lighting device 10, and therefore becomes any of red light, green light, blue light, and white light. .. The light receiving path portion 2c5 is formed of, for example, an acrylic resin. The light receiving path portion 2c5 is formed in an appropriate shape. A part of the light receiving path portion 2c5 is covered with the second cover 2b and is integrally formed with the sensor 2. The light source 1a is not limited to two or more types having different emission colors. The light source 1a may be a plurality of LEDs having the same emission color. The light source 1a may be configured such that light sources having the same emission color are grouped into a plurality of groups and can be driven in each of the plurality of groups.

In other words, the lighting device 10 of the present embodiment includes a long housing 4. The housing 4 houses the light source 1a, the sensor 2, and the control unit 3 inside. The housing 4 is configured so that light from the outside is incident inside at the end portion in the longitudinal direction. The sensor 2 is configured to detect the amount of light from the outside incident from the end portion. The control unit 3 uses a light source based on a detection result corresponding to a detection value in which the sensor 2 detects the amount of light of the light source 1a and a detection value in which the sensor 2 detects the amount of light from the outside incident from the end portion. It is preferable to control the lighting of the light source 1a so that the amount of light of 1a falls within the target range.

In the lighting device 10 of the present embodiment, the sensor 2 has a relatively simple configuration for detecting the amount of light incident from the outside from the end portion, and the variation in the amount of light of the lighting device 10 can be further reduced. In particular, in the lighting device 10 of the present embodiment, when the amount of light from the outside incident from the end is the amount of light from another lighting device 10, the variation in the amount of light between adjacent lighting devices 10 is made smaller. can do. That is, the control unit 3 of the first lighting device 10A is based on the detection result corresponding to the detection value of detecting the light amount of the light source 1a of the first lighting device 10A and the detection value of detecting the light amount of the second lighting device 10B. Therefore, the lighting of the light source 1a of the first lighting device 10A is controlled. The illuminating device 10 of the present embodiment can reduce the variation in the amount of light with the other illuminating device 10 by detecting the amount of light of the other illuminating device 10.

In the illuminating device 10, when a reference light source whose amount of light from the outside incident from the end is different from that of the other illuminating device 10 is used, the variation in the amount of light of the illuminating device 10 can be reduced more accurately.

In the lighting device 10 of the present embodiment, it is preferable that the housing 4 has a light receiving path portion 2c5 that guides light from the outside incident from the end portion to the sensor 2.

In the lighting device 10 of the present embodiment, the sensor 2 can accurately detect the light from the outside incident from the end portion due to the configuration having the light receiving path portion 2c5. In the illuminating device 10, when the light from the other illuminating device 10 is incident from the end portion, the light from the other illuminating device 10 can be detected with high accuracy.

Hereinafter, the configuration of the lighting system 20 of the present embodiment will be briefly described.

The lighting system 20 according to the present embodiment is provided in the aircraft 30a shown in FIG. In the aircraft 30a, a plurality of lighting devices 10 are arranged linearly in the longitudinal direction along the front-rear direction. The plurality of lighting devices 10 are arranged adjacent to each other so that the light of the other lighting devices 10 can enter from the end portion.

As shown in FIG. 11, the lighting system 20 is configured such that one control device 21 controls four lighting devices 10. The control device 21 is configured to be able to separately control the drive of the four lighting devices 10. Each of the four lighting devices 10 is electrically connected to the external power supply 22. Each of the lighting devices 10 is configured so that feed wiring can be performed. The external power supply 22 is configured to be able to output a voltage of, for example, DC 28V.

Next, the operation of the lighting system 20 according to the present embodiment will be described in comparison with the lighting system of the comparative example.

The lighting system of the comparative example is a sensor provided in each of a plurality of lighting devices, detects only the light output of the light source of each lighting device, and feedback-controls the amount of light of the light source based on the detection result detected by the sensor. doing. In the lighting system of the comparative example, each of the plurality of lighting devices feedback-controls the amount of light from the light source to cause variations in the light output of the light source due to variations in the characteristics of the initial light source, deterioration over time of the light source, and temperature characteristics of the light source. Can be reduced.

By the way, in the lighting system of the comparative example, even if the light amount of the light source of each lighting device is feedback-controlled, a plurality of lights are lit due to variations in the sensor characteristics of the sensor that detects the light output of the light source, deterioration of the sensor over time, and the like. There is a risk that the optical output will vary between devices.

On the other hand, in the lighting system 20 according to the present embodiment, for example, the sensor 2 of the first lighting device 10A detects the light amount of the light source 1a of the first lighting device 10A, and determines the light amount of the light source 1a of the first lighting device 10A. Feedback control. In the lighting system 20, the variation in the light output of the light source 1a in the first lighting device 10A is reduced. The lighting system 20 further detects, for example, the amount of light of the second lighting device 10B adjacent to the first lighting device 10A by the sensor 2 of the first lighting device 10A among the plurality of lighting devices 10. In the lighting system 20, the sensor 2 of the first lighting device 10A detects the amount of light of the light source 1a of the first lighting device 10A by a command from the control device 21. 2 The amount of light of the lighting device 10B is detected.

The lighting system 20 feedback-controls the light amount of the light source 1a of the first lighting device 10A so that the difference between the light amount of the second lighting device 10B and the light amount of the first lighting device 10A becomes small. In the lighting system 20, the variation in light output between the first lighting device 10A and the second lighting device 10B can be further reduced.

Hereinafter, the lighting system 20 according to the present embodiment will be described more specifically with reference to FIG.

In the lighting system of the comparative example, when the light amount of the light source is feedback-controlled for each individual lighting device, for example, when the light output of the fourth lighting device is used as a reference, the light output of the fourth lighting device is 100%, whereas the light output of the fourth lighting device is 100%. 3 The light output of the lighting device may be 98%. In the lighting system of the comparative example, for example, based on the light output of the fourth lighting device, the light output of the fourth lighting device may be 100% and the light output of the second lighting device may be 105%. In the lighting system of the comparative example, for example, based on the light output of the fourth lighting device, the light output of the fourth lighting device may be 100% and the light output of the first lighting device may be 97%.

In the lighting system 20 according to the present embodiment, the control device 21 issues a command to output the same light output to, for example, the third lighting device 10C and the fourth lighting device 10D. In the lighting system 20, the third lighting device 10C is set on the basis of the light output of the fourth lighting device 10D so that the light amount of the third lighting device 10C and the light amount of the fourth lighting device 10D match at the same timing. Controls the lighting of the light source 1a.

More specifically, in the third lighting device 10C, the sensor 2 detects the amount of light for each of two or more types of light sources 1a having different emission colors, based on a command from the control device 21. In the third lighting device 10C, further, based on a command from the control device 21, the sensor 2 of the third lighting device 10C emits light for each of two or more types of light sources 1a having different emission colors in the adjacent fourth lighting device 10D. Is detected. The third illuminating device 10C detects the amount of light of the light source 1a of the fourth illuminating device 10D in the same manner as detecting the amount of light of the light source 1a of the third illuminating device 10C. In FIG. 12, it is illustrated by a broken line arrow that the lighting device 10 detects the amount of light of another lighting device 10 adjacent to the lighting device 10.

In the lighting system 20, since the sensor 2 of the third lighting device 10C detects the amount of light of the fourth lighting device 10D based on the command from the control device 21, the control device 21 is the sensor of the third lighting device 10C. The emission color of the light source 1a of the fourth lighting device 10C detected by 2 can be specified. The third lighting device 10C transmits the detected value of the light amount of the light source 1a2 in the third lighting device 10C detected by the sensor 2 of the third lighting device 10C from the communication unit 3c to the control device 21. The third lighting device 10C transmits the detected value of the amount of light of the light source 1a2 in the fourth lighting device 10D detected by the sensor 2 of the third lighting device 10C from the communication unit 3c to the control device 21.

The control device 21 corrects the lighting of the light source 1a of the third lighting device 10C so that the difference between the light amount of the light source 1a of the third lighting device 10C and the light amount of the light source 1a of the fourth lighting device 10C becomes small. Calculate the coefficient. The control device 21 transmits the detection result using the calculated correction coefficient to the third lighting device 10C. The third lighting device 10C controls the lighting of the light source 1a based on the detection result. In the lighting system 20 according to the present embodiment, the light amount of the light source 1a of the third lighting device 10C is corrected so as to match the light amount of the light source 1a of the fourth lighting device 10D, whereby the third lighting device 10C and the fourth The variation in light output with the lighting device 10D can be further reduced.

In the lighting system 20, for example, when the light output of the third lighting device 10C before correction is 98% with respect to the fourth lighting device 10D, the light output of the third lighting device 10C after correction is 100%. Make corrections to improve the light output. That is, the third illuminating device 10C detects the light output of the fourth illuminating device 10D irradiating the light of the same light output by the command from the control device 21 with the sensor 2 of the third illuminating device 10C, and the third This is reflected in the light output emitted by the light source 1a of the lighting device 10C.

Next, the lighting system 20 corrects the light output of the third lighting device 10C so as to match the light output of the fourth lighting device 10D, and makes the light output of the second lighting device 10B the third lighting. The correction is made so as to match the optical output of the device 10C. In the lighting system 20, for example, when the light output of the second lighting device 10C before correction is 105% of the light output of the third lighting device 10C, the light output of the second lighting device 10C after correction is 100%. Make corrections to reduce the light output so that The lighting system 20 corrects the light output of the second lighting device 10B so as to match the light output of the third lighting device 10C, and then matches the light output of the first lighting device 10A with the light output of the second lighting device 10B. Correct to do. In the lighting system 20, for example, when the light output of the first lighting device 10A before correction is 97% of the light output of the second lighting device 10B, the light output of the first lighting device 10A after correction is 100%. Make corrections to improve the light output so that The lighting system 20 is adjacent to the brightness of the fourth lighting device 10D by correcting the third lighting device 10C to the first lighting device 10A sequentially from the end so as to match the light output of the adjacent lighting device 10. Match the light outputs of all the lighting devices 10. The lighting system 20 can reduce the variation in light output between the lighting devices 10 by correcting the light outputs of all the adjacent lighting devices 10 so as to match each other.

That is, in the lighting system 20 according to the present embodiment, it is preferable that two or more lighting devices 10 are provided, and the light from the outside incident from the end portion is the light from another adjacent lighting device 10. ..

In the lighting system 20 of the present embodiment, the variation in light output between the lighting devices 10 can be reduced by the light from other adjacent lighting devices 10.

The lighting device 10 of the present embodiment is not limited to the above-described configuration, and may be configured by appropriately using the configurations of the first and second embodiments.

(Embodiment 4)
The lighting device 10 of the present embodiment shown in FIG. 15 is provided with a light source 1a having the same emission color instead of using the light sources 1a having different emission colors of the first embodiment and the third embodiment shown in FIG. Is mainly different. The same components as those in the first to third embodiments will be described by using the same reference numerals.

As shown in FIG. 15, the lighting device 10 of the present embodiment includes a light source 1a, a sensor 2, and a control unit 3. The sensor 2 detects the amount of light from the light source 1a. The control unit 3 controls the lighting of the light source 1a. The light source 1a has a first light source 1f and a second light source 1s. As the first light source 1f, a light emitting diode provided with a phosphor capable of emitting neutral white color with one chip is used. As the second light source 1s, a light emitting diode having a phosphor capable of emitting neutral white color with one chip is used. The first light source 1f and the second light source 1s emit the same neutral white light. The first light source 1f and the second light source 1s are configured so that lighting can be controlled separately.

The control unit 3 repeats a plurality of cycles with the set of the first period and the second period as one cycle, and the combined light of the light of the first light source 1f and the light of the second light source 1s in each cycle is the same. The lighting of the light source 1a is controlled so as to be an optical output. The combined light of the light of the first light source 1f and the light of the second light source 1s has a neutral white light color. In the first period, the sensor 2 radiates light only to the first light source 1f or only the second light source 1s to be detected for detecting the amount of light. In the second period, light is emitted to the first light source 1f and the second light source 1s. The sensor 2 outputs detection values obtained by separately detecting the amount of light of the first light source 1f in the first period and the amount of light of the second light source 1s in the first period. Based on the detection result, the control unit 3 further controls the lighting of the first light source 1f and the second light source 1s so that the amount of light of the light source 1a falls within the target range. The detection result corresponds to the value detected in a predetermined number of times.

In the lighting device 10 of the present embodiment, the control unit 3 has a configuration in which the lighting of the light source 1a is separately controlled based on the detection result corresponding to the value detected in a predetermined number of times, so that the light output variation is further increased. Can be reduced.

Hereinafter, the control of the lighting device 10 of the present embodiment will be described in more detail.

In the lighting device 10, the control unit 3 separately controls the lighting of the first light source 1f and the second light source 1s having the same emission color based on the on-duty ratio of the PWM signal. The fifth lighting circuit 3b5 of the control unit 3 radiates light only to the first light source 1f while maintaining a predetermined on-duty ratio within one cycle of the PWM signal in the first period. The sixth lighting circuit 3b6 of the control unit 3 starts the radiation of the second light source 1s while maintaining the on-duty ratio within one cycle of the PWM signal, and the timing of starting the radiation of light to the first light source 1f. The shift control is performed.

The lighting device 10 of the present embodiment detects the amount of light of the first light source 1f once in the first period of one cycle for detecting the amount of light of the first light source 1f, and detects it from each of the first periods of each of a plurality of consecutive cycles. The lighting of the light source 1a is controlled by using the integrated value obtained by integrating the detected detection values as the detection result. The lighting device 10 detects the amount of light of the second light source 1s once in the first period of one cycle for detecting the amount of light of the second light source 1s, and detects the detected values from each of the first periods of each of a plurality of consecutive cycles. The lighting of the light source 1a is controlled by using the integrated value as the detection result.

In the lighting device 10 of the present embodiment, the sensor 2 detects the amount of light of the light source 1a in the order of the first light source 1f and the second light source 1s, and repeats the integration of the detected detection values a predetermined number of times to further output light. The configuration can be configured with little variation.

By the way, in the lighting device of the comparative example in which the feedback control of the light amount of the light source is not performed, the light output may vary depending on the drive circuit for driving the first light source and the second light source due to deterioration with time. In the lighting device of the comparative example, if the light output varies depending on the drive circuit that drives the first light source and the second light source, uneven brightness may occur between the first light source and the second light source. is there.

In the lighting device 10 of the present embodiment, the brightness unevenness can be reduced by performing feedback control of the amount of light of the light source 1a for each drive circuit that drives the first light source 1f and the second light source 1s.

The light source 1a is not limited to a light emitting diode capable of emitting neutral white light. The light source 1a may be a light emitting diode capable of emitting daylight color, a light emitting diode capable of emitting white, a light emitting diode capable of emitting warm white, or a light emitting diode capable of emitting light bulb color, which is standardized by JIS Z 9112. .. The light source 1a is not limited to the light emitting diode standardized by JIS Z 9112. The light source 1a may be, for example, a light emitting diode capable of emitting a light color standardized by ANSI C78.377.

The lighting device 10 of the present embodiment may be configured by appropriately using the configuration of the lighting device 10 of the first to third embodiments. The lighting device 10 of the present embodiment can also be applied to the lighting system 20 and the moving body 30 as in the first embodiment.

(Embodiment 5)
As in the third embodiment shown in FIG. 12, the lighting system 20 of the present embodiment uses a plurality of lighting devices 10 by using the light detection device 23 instead of using the light detection by the sensor 2 in another adjacent lighting device 10. The main difference is that the variation in light output between them is reduced. The lighting system 20 of the present embodiment is configured by using the same lighting device 10 as that of the first embodiment. The same components as those in the first and third embodiments will be described by using the same reference numerals.

In the lighting system 20 of the present embodiment, as shown in FIGS. 16, 17A, 17B and 17C, two or more lighting devices 10 are provided. The lighting system 20 includes a photodetector 23. The photodetector 23 is provided separately from the two or more lighting devices 10. The light detection device 23 is configured to be able to detect the amount of light of two or more lighting devices 10. The light detection device 23 is configured to be able to transmit a detection value based on the detected light amount to the control device 21 in response to a request from the control device 21.

In the lighting system 20 of the present embodiment, the light detection device 23 transmits a detection value based on the detected light amount to the control device 21 in response to a request from the control device 21, so that the light amount of the lighting device 10 to be detected is detected. Can be detected. By detecting the amount of light of the illuminating device 10 to be detected, the illuminating system 20 identifies the illuminating device 10 that cannot output a predetermined amount of light, and can be used for replacement of the specified illuminating device 10. The lighting system 20 can be used to reduce variations in light output between the plurality of lighting devices 10 by detecting the amount of light of the plurality of lighting devices 10 and using the lighting system 20 for correction to make the light amounts of the lighting devices 10 the same. ..

In the lighting system 20 of the present embodiment, the control device 21 is electrically connected to each of the plurality of lighting devices 10. The photodetector 23 is configured to be electrically connected to the control device 21. The light detection device 23 is configured to be able to detect the light output of the lighting device 10 based on a command from the control device 21. The control device 21 is configured to be able to acquire a detected value obtained by detecting the amount of light of the light source 1a in the lighting device 10 to be detected detected by the photodetector 23.

As shown in FIG. 17A, for example, the control device 21 is configured to be able to acquire a detected value obtained by detecting the amount of light of the light source 1a in the second lighting device 10B detected by the photodetector 23. In FIG. 17A, the data of the detected value transmitted from the photodetector 23 to the control device 21 is illustrated by a white dashed arrow.

As shown in FIG. 17B, for example, the control device 21 is configured to be able to acquire a detected value obtained by detecting the amount of light of the light source 1a of the second lighting device 10B detected by the sensor 2 of the second lighting device 10B. In FIG. 17B, the data of the detected value transmitted from the second lighting device 10B to the control device 21 is illustrated by a white arrow.

For example, as shown in FIG. 17C, the control device 21 is a light source of the second lighting device 10B based on the detection value detected by the light detection device 23 and the detection value detected by the sensor 2 of the second lighting device 10B. It is configured to transmit correction data for controlling the lighting of 1a. In FIG. 17C, the correction data transmitted from the control device 21 to the second lighting device 10B is illustrated by a black arrow. The second lighting device 10B controls the lighting of the light source 1a of the second lighting device 10B based on the correction data.

In the lighting system 20 of the present embodiment, similarly to the second lighting device 10B, the first lighting device 10A, the third lighting device C, and the fourth lighting device D are also the lighting devices 10 to be detected by the photodetector 23. Detect the amount of light. In the lighting system 20, the light detection device 23 detects the amount of light of the lighting device 10 to be detected, and the lighting device 10 is controlled so that the variation in light output in the lighting device 10 to be detected is reduced.

That is, in the lighting system 20 of the present embodiment, the control device 21 is electrically connected to each of the plurality of lighting devices 10. The control device 21 so that the amount of light from the illuminating device 10 to be detected falls within a predetermined range based on the amount of light of the illuminating device 10 detected by the light detecting device 23 and the amount of light detected by the sensor 2 in the illuminating device 10. In addition, it is preferable to control the lighting device 10 to be detected.

In the illuminating system 20 of the present embodiment, the illuminating device 10 to be detected is based on the amount of light detected by the illuminating device 10 by the control device 21 and the amount of light detected by the sensor 2 in the illuminating device 10. The variation in light output between the lighting devices 10 can be reduced by the configuration of controlling the above.

In the lighting system 20 of the present embodiment, the photodetector 23 is configured to be appropriately arranged so that the amount of light from the target lighting device 10 can be detected. The photodetector 23 is configured to be able to detect the amount of light from the light source 1a in synchronization with the lighting of the light source 1a from the target lighting device 10 based on a command from the control device 21. In the lighting system 20, when the photodetector 23 is not used, it does not have to be electrically connected to the control device 21.

The photodetector 23 can be configured by using, for example, a color sensor, an illuminance sensor, a spectroscope, or the like. The color sensor is configured by combining a photodiode with a color filter, and can detect an optical output of a predetermined color tone. The illuminance sensor is configured to include a phototransistor or a photodiode, and can detect an optical output. As the spectroscope, for example, a prism spectroscope, a lattice spectroscope using a diffraction grating, and an interference spectroscope using interference fringes can be used.

The control device 21 is configured to transmit correction data including a correction coefficient for correction so that a predetermined amount of light can be output from the light source 1a to the lighting device 10. In the lighting system 20, the control device 21 transmits correction data to the lighting device 10, so that the light detection device 23 can be used to reduce variations in light output between adjacent lighting devices 10.

Next, the operation of the lighting system 20 of the present embodiment will be described.

The lighting system 20 of the present embodiment is configured so that the drive control unit 3a can correct the control signal for controlling the lighting circuit 3b so that the light output does not vary among the plurality of lighting devices 10. Has been done. The lighting device 10 uses the photodetector 23 to correct the lighting of the light source 1a so that the variation in light output among the plurality of lighting devices 10 is reduced. The correction is performed by comparing, for example, the amount of light of the lighting device 10 based on the amount of light of the light source 1a detected by the sensor 2 and the amount of light measured by the photodetector 23. The control device 21 calculates a correction coefficient such that the light amount of the light source 1a detected by the sensor 2 and the light amount of the light detection device 23 match. In the lighting device 10, the correction coefficient calculated by the control device 21 is stored in the storage unit 3a1 of the drive control unit 3a. The correction coefficient can be calculated by, for example, the computer of the control device 21 connected to the photodetector 23 and the sensor 2 of the lighting device 10. The correction coefficient is not limited to the configuration calculated by the control device 21, and the correction coefficient may be calculated by the photodetector 23.

By the way, in a lighting system, when a predetermined light output cannot be output in a specific lighting device due to a failure of the lighting device, deterioration of a light source in the lighting device with time, and deterioration of a sensor in the lighting device with time, among a plurality of lighting devices , Only certain luminaires may be replaced.

In the lighting system of the comparative example, among the plurality of lighting devices, one or more replaced lighting devices are compared with one or more non-replaced lighting devices even if the same dimming signal is transmitted from the control device. Therefore, the light output may be significantly different. In a lighting system, a plurality of lighting devices having a uniform deterioration environment tend to have significantly different light outputs as compared with a lighting device having a poor deterioration environment.

In the luminaires of the comparative example, of a plurality of luminaires, two or more lighting groups are classified between one or more new luminaires that have been replaced and one or more old luminaires that have not been replaced. Is formed.

In the lighting system 20 of the present embodiment, for example, as shown in FIG. 17A, only the first lighting device 10A and the second lighting device 10B may be exchanged. In the lighting system 20, the non-replaced third lighting device 10C and the fourth lighting device 10D constitute the first lighting group 10f, and the replaced first lighting device 10A and the second lighting device 10B form the second lighting group 10s. To configure.

In the lighting system 20 of the present embodiment, the control device 21 classifies the first lighting group 10f and the second lighting group 10s so as to be discriminated from each other. Even if the lighting system 20 does not detect the amount of light for the plurality of lighting devices 10, for example, only the amount of light of the second lighting device 10B in the first lighting group 10f and the third lighting device in the second lighting group 10s. Only the amount of light of 10C is detected. The control device 21 corrects the light output variation between the lighting devices 10 based on the light amount of the second lighting device 10B of the first lighting group 10f and the light amount of the third lighting device 10C of the second lighting group 10s. Compute the data. The control device 21 transmits the correction data to the first lighting group 10f to which the second lighting device 10B to be corrected belongs. In the lighting system 20, the lighting of the first lighting device 10A and the second lighting device 10B belonging to the first lighting group 10f is controlled based on the correction data.

In other words, in the lighting system 20 of the present embodiment, the control device 21 classifies the two or more lighting devices 10 into two or more lighting groups. The control device 21 transmits correction data based on the amount of light detected from the lighting device 10 measured by the light detection device 23 and the amount of light detected by the sensor 2 of the lighting device 10 for each lighting group to which the lighting device 10 belongs. Is preferable.

In the lighting system 20 of the present embodiment, the control device 21 transmits the correction data for each lighting group, so that the variation in light output between the plurality of lighting devices 10 can be reduced relatively easily.

In the lighting system 20, the control device 21 can classify the lighting group based on the history of the history detection unit 3a2 provided in the drive control unit 3a of each of the lighting devices 10, for example. The history detection unit 3a2 can be configured by a timer counter. The lighting device 10 is configured so that the address of each lighting device 10 and the count value counted by the history detection unit 3a2 can be transmitted from the communication unit 3c to the control device 21. The control device 21 may be classified as forming the same lighting group if, for example, the counter value of the history detection unit 3a2 after the lighting device 10 is attached is within a predetermined value range. The control device 21 can manage the history of old and new replacement information of the new lighting device 10 in which the lighting device 10 has been replaced or the old lighting device 10 in which the lighting device 10 has not been replaced. In the lighting system 20, the control device 21 is a polling process that periodically communicates with a plurality of lighting devices 10, and the lighting device 10 that cannot communicate is regarded as a replaced lighting device 10 and is regarded as a lighting group. Can also be classified. In the lighting system 20, when polling is performed, the control device 21 is configured to include the history detection unit 3a2.

In other words, in the lighting system 20 of the present embodiment, the control device 21 classifies two or more lighting groups into the information of the history detection unit 3a2 that detects the exchanged lighting device 10 among the plurality of lighting devices 10. It is preferable to carry out based on.

The control device 21 relatively easily classifies two or more lighting groups based on the information of the history detection unit 3a2 that detects the replaced lighting device 10 among the plurality of lighting devices 10. The variation in light output between 10 can be reduced.

In the lighting system 20, when the sensor 2 does not detect the light amount of the lighting device 10, the light amount ratio of the target value corresponding to the current flowing through the light source 1a of the lighting device 10 is based on the detection value of the light detection device 23. , The correction coefficient can be obtained and reflected in the control of the light source 1a. The lighting system 20 uses the light detection device 23 to detect variations in light output between the plurality of lighting devices 10 even when the sensor 2 does not perform feedback control of the amount of light of the light source 1a, and a plurality of lights. The variation in light output between the devices 10 can be reduced. The lighting system 20 may be configured to display the replacement of the lighting device 10 by using the history detection unit 3a2. In the lighting device 10, the replacement of the lighting device 10 can be displayed by blinking the light source 1a or the like. In the lighting system 20, for example, even if each of the plurality of lighting devices 10 is provided with only one type of light source 1a, the control unit 3 detects so as to reduce the variation in the light output of the light sources 1a between the lighting devices 10. The light source 1a can also be controlled based on the result.

The lighting device 10 of the present embodiment is not limited to the above-described configuration, and may be configured by appropriately using the configurations of the first to fourth embodiments.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical idea of the present invention.

1a light source 1f 1st light source 1s 2nd light source 2 sensor 2c5 light receiving path part 3 control unit 3c communication unit 3a2 history detection unit 4 housing 10 lighting device 20 lighting system 21 control device 23 light detection device 30 moving object

Claims (18)

It includes a light source, a sensor that detects the amount of light of the light source, and a control unit that controls the lighting of the light source.
The light source has a first light source and a second light source.
The control unit emits light to only the first light source or only the second light source, which is the light source to be detected by the sensor, and the light to the first light source and the second light source. A set of two periods is set as one cycle, and a plurality of cycles are repeated so that the light of the first light source and the combined light of the light of the second light source in the plurality of cycles have the same light output. It controls the lighting of the light source.
The sensor outputs a detection value obtained by separately detecting the amount of light of the first light source in the first period and the amount of light of the second light source in the first period.
The control unit further controls the first light source and the first light source so that the amount of light of the light source falls within a target range based on a dimming signal obtained by multiplying the detected value by a correction coefficient obtained from the values detected at a predetermined number of times. A lighting device that controls the lighting of the second light source separately. It includes a light source, a sensor that detects the amount of light of the light source, and a control unit that controls the lighting of the light source.
The light source has a first light source and a second light source.
The control unit emits light to only the first light source or only the second light source, which is the light source to be detected by the sensor, and the light to the first light source and the second light source. A set of two periods is set as one cycle, and a plurality of cycles are repeated so that the light of the first light source and the combined light of the light of the second light source in the plurality of cycles have the same light output. It controls the lighting of the light source.
The sensor outputs a detection value obtained by separately detecting the amount of light of the first light source in the first period and the amount of light of the second light source in the first period.
Further, the control unit lights the first light source and the second light source so that the amount of light of the light source falls within the target range based on the detection result corresponding to the value detected in the predetermined number of times. Is controlled separately,
Within the one cycle, the control unit shifts the timing of starting the radiation of light only to the light source to be detected detected by the sensor and the timing of starting the radiation of light from the remaining light source. Control the phase difference and
The control unit is a lighting device that gradually increases the phase difference over two or more cycles out of the plurality of cycles. The light source has two or more types of light sources having different emission colors, and includes at least the first light source and the second light source.
The first period is a monochromatic period in which light is radiated to only one of the two or more types of light sources.
The second period is a color mixing period in which light is radiated to the two or more types of light sources.
The control unit controls the lighting of the two or more types of light sources so that the mixed colors of the lights of the two or more types of light sources in the plurality of cycles have the same light color.
The sensor outputs a detection value that detects the amount of light of the one type of light source during the monochromatic period.
The lighting device according to claim 1 , wherein the control unit separately controls the lighting of the two or more types of light sources so that the amount of light of the light source falls within the target range based on the dimming signal . The light source has two or more types of light sources having different emission colors, and includes at least the first light source and the second light source.
The first period is a monochromatic period in which light is radiated to only one of the two or more types of light sources.
The second period is a color mixing period in which light is radiated to the two or more types of light sources.
The control unit controls the lighting of the two or more types of light sources so that the mixed colors of the lights of the two or more types of light sources in the plurality of cycles have the same light color.
The sensor outputs a detection value that detects the amount of light of the one type of light source during the monochromatic period.
The lighting device according to claim 2, wherein the control unit separately controls the lighting of the two or more types of light sources so that the amount of light of the light source falls within the target range based on the detection result. Within the one cycle, the control unit shifts the timing of starting the radiation of light only to the light source to be detected detected by the sensor and the timing of starting the radiation of light from the remaining light source. The lighting device according to claim 1 , claim 3 or claim 4, which controls the phase difference. The lighting device according to claim 5 , wherein the control unit gradually increases the phase difference over two or more cycles out of the plurality of cycles. The lighting device according to claim 2 or 6 , wherein the sensor detects the amount of light of the light source to be detected in the first period in one cycle in which the phase difference is the largest. Said sensor, said case lighting period of the detection target of the light source in the first period is shorter than the preset detection time for detecting the detection value, claims 1 to claim does not detect the light amount of the detection target light source The lighting device according to any one of 7 . Equipped with a long housing,
The housing houses the light source, the sensor, and the control unit inside.
The housing is configured so that light from the outside is incident inside at the end portion in the longitudinal direction.
The sensor detects the amount of light from the outside incident from the end portion, and detects the amount of light from the outside.
The control unit is based on a detection result corresponding to a detection value in which the sensor detects the amount of light of the light source and a detection value in which the sensor detects the amount of light from the outside incident from the end portion. The lighting device according to any one of claims 1 to 8 , which controls lighting of the light source so that the amount of light of the light source falls within the target range. The lighting device according to claim 9 , wherein the housing has a light receiving path portion that guides light from the outside incident from the end portion to the sensor. It has one or more of the lighting devices according to any one of claims 1 to 10 and a control device for controlling the drive of the lighting devices.
The lighting device further includes a communication unit that communicates with the control device.
The communication unit is a lighting system that transmits the detected value to the control device in response to a request from the control device. The lighting system according to claim 11 , wherein the communication unit transmits the detected value after the light source is turned on for a predetermined time. Two or more of the lighting devices according to claim 9 or claim 10 are provided.
A lighting system in which light from the outside incident from the end is light from another adjacent lighting device. Two or more of the lighting devices are provided.
It is provided separately from the two or more lighting devices and is provided with a photodetector for detecting the amount of light of the two or more lighting devices.
The lighting system according to claim 11 or 12 , wherein the photodetector transmits a detected value based on the detected light amount to the control device in response to a request from the control device. The control device is electrically connected to each of the two or more lighting devices, and is based on the amount of light of the lighting device detected by the light detection device and the amount of light detected by the sensor in the lighting device. The lighting system according to claim 14 , wherein the lighting device to be detected is controlled so that the amount of light from the lighting device to be detected falls within a predetermined range. The control device classifies the two or more lighting devices into two or more lighting groups, and corrects based on the amount of light detected from the lighting device measured by the light detection device and the amount of light detected by the sensor of the lighting device. The lighting system according to claim 14 or 15 , wherein data is transmitted for each lighting group to which the lighting device belongs. The lighting system according to claim 16 , wherein the control device classifies the two or more lighting groups based on the information of the history detection unit that detects the replaced lighting device among the two or more lighting devices. .. A mobile body including the lighting system according to any one of claims 11 to 17 , and a main body on which the lighting system is mounted.

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