JP2012094396A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a life of a light source from being reduced while keeping lights emitted from a lighting system almost constant.SOLUTION: A light source circuit 140 has a light source for emitting lights by a current. An illuminance detection circuit 150 has an illuminance sensor for receiving the lights and measuring an amount of the received lights. A power source circuit 160 supplies the current to the light source circuit 140. A control circuit 300 (control part) controls the current supplied to the light source circuit 140 by the power source circuit 160, so that the amount of the lights measured by the illuminance sensor approaches a predetermined light quantity within a range such that the current supplied to the light source circuit 140 by the power source circuit 160 does not exceed a maximum rating value of the light source circuit 140.

Description

  The present invention relates to an illumination device having a light source such as an LED.

Light sources such as LEDs have variations in brightness when the same current is passed. Also, the brightness of light sources such as LEDs gradually decreases due to aging.
There is a technique for detecting the brightness of a light source and adjusting the brightness of the light source using an illuminance sensor.

JP 2003-163090 A

When the brightness of the light source is adjusted using the illuminance sensor, the current flowing through the light source increases, for example, in order to maintain the brightness of the light source as the brightness of the light source decreases due to deterioration over time. When an overcurrent flows through the light source, the light source may further deteriorate.
The present invention has been made to solve the above-described problems, for example, and an object of the present invention is to prevent the life of the light source from being shortened while keeping the light emitted from the lighting device substantially constant.

  An illumination device according to the present invention includes a light source that emits light by current, an illuminance sensor that receives light and measures the amount of received light, a power supply circuit that supplies current to the light source, and the power supply circuit The power supply circuit is connected to the light source so that the amount of light measured by the illuminance sensor approaches a predetermined target light amount within a range where the amount of current supplied to the light source does not exceed the maximum rated value of the light source. And a controller for adjusting the amount of current supplied.

  According to the illumination device according to the present invention, the light emitted from the illumination device can be kept substantially constant for a long period of time.

FIG. 3 is a perspective view showing an appearance of lighting apparatus 100 according to Embodiment 1. FIG. 3 is a partially enlarged cross-sectional view in side view showing the structure of lighting apparatus 100 in the first embodiment. FIG. 3 is a block configuration diagram illustrating an example of a configuration of the lighting device 100 according to Embodiment 1. FIG. 3 is a block configuration diagram illustrating a configuration of a control circuit 300 in the first embodiment. FIG. 6 is a flowchart showing a flow of lighting processing S600 in the first embodiment. FIG. 10 is a perspective view illustrating an appearance of lighting apparatus 100 according to Embodiment 2. FIG. 6 is an enlarged cross-sectional view in side view showing the structure of lighting apparatus 100 according to Embodiment 2. FIG. 6 is an enlarged cross-sectional view in side view showing the structure of lighting apparatus 100 according to Embodiment 2. FIG. 6 is a block configuration diagram illustrating a configuration of lighting apparatus 100 according to Embodiment 2. FIG. 3 is a block configuration diagram illustrating a configuration of a control circuit 300 in a second embodiment. The flowchart figure which shows the flow of lighting process S600 in Embodiment 2. FIG. FIG. 9 is a block configuration diagram showing a configuration of a control circuit 300 in a third embodiment. FIG. 11 is a flowchart showing a flow of lighting processing S600 in the third embodiment. FIG. 10 is a perspective view illustrating an appearance of a remote control according to Embodiment 4. FIG. 10 is a perspective view illustrating an appearance of lighting apparatus 100 according to Embodiment 5. FIG. 10 is a plan view illustrating a structure of lighting device 100 according to Embodiment 5. FIG. 7 is an enlarged cross-sectional view in side view showing the structure of lighting apparatus 100 according to Embodiment 5. FIG. 7 is a block configuration diagram showing a configuration of a control circuit 300 in a fifth embodiment. FIG. 7 is a block configuration diagram showing a configuration of a control circuit 300 in a fifth embodiment. The flowchart figure which shows the flow of lighting process S600 in Embodiment 5. FIG.

Embodiment 1 FIG.
The first embodiment will be described with reference to FIGS.

FIG. 1 is a perspective view showing an appearance of the illumination device 100 according to this embodiment.
The illumination device 100 is, for example, an LED illumination device. The lighting device 100 includes a housing 110, a reflection unit 120, a substrate 130, a light source 141, a light shielding unit 210, and the like.
The light source 141 is mounted on the substrate 130 (LED module substrate) and emits light by current. The light source 141 is, for example, an LED. The reflector 120 diffuses or specularly reflects light emitted from the light source 141. The housing 110 incorporates a power supply circuit that supplies current to the light source 141.

FIG. 2 is a partially enlarged cross-sectional view in side view showing the structure of the illumination device 100 in this embodiment.
An illuminance sensor 151 is included in the light shielding unit 210. The illuminance sensor 151 is mounted on the same surface as the surface on which the light source 141 of the substrate 130 is mounted. The illuminance sensor 151 receives light and measures the amount of received light. The illuminance sensor 151 is, for example, a photodiode or a phototransistor. The light shielding unit 210 blocks light other than light emitted from the light source 141 so that the illuminance sensor 151 does not receive light, and causes the illuminance sensor 151 to receive only light emitted from the light source 141.
The light shielding part 210 has, for example, a substantially frustoconical shape with a double structure. The light shielding portion 210 includes a top surface portion 211, an outer cone portion 212, an inner cone portion 214, and the like. The top surface portion 211 is the top surface of the truncated cone outside the light shielding portion 210 and has a substantially disk shape. The outer surface of the top surface portion 211 diffuses or reflects light. The inner surface of the top surface portion 211 is, for example, white and diffusely reflects light. The outer cone portion 212 is a side surface of the truncated cone outside the light shielding portion 210. The outer surface of the outer cone portion 212 diffuses or reflects light. The inner surface of the outer cone portion 212 is, for example, black and absorbs light. The outer conical portion 212 is provided with an external lighting hole 213. The external lighting hole 213 is provided at a position where the light emitted from the light source 141 strikes just near the center of the top surface portion 211. The inner cone portion 214 is a side surface of the truncated cone inside the light shielding portion 210. The outer surface of the inner cone portion 214 is, for example, black and absorbs light. The inner cone portion 214 blocks light that has entered the outer cone portion 212 from the direction other than the light source 141 through the outer daylighting hole 213. The top surface of the truncated cone inside the light shielding unit 210 is open, and an internal lighting hole 215 is provided. Thereby, the illuminance sensor 151 receives only the diffusely reflected light that hits the vicinity of the center inside the top surface portion 211.
In addition, the structure of the light-shielding part 210 is an example, and if the illumination intensity sensor 151 is a structure which receives only the light which the light source 141 emitted, and does not receive the light other than that, it is another structure. Also good.

FIG. 3 is a block configuration diagram showing an example of the configuration of the illumination device 100 according to this embodiment.
The lighting device 100 is supplied with power from an AC power source AC such as a commercial power source, and turns on the light source 141. The lighting device 100 includes a light source circuit 140, an illuminance detection circuit 150, a power supply circuit 160, a current detection circuit 170, a control circuit 300, and the like.
The light source circuit 140 (LED light source unit) is a circuit having a light source 141 mounted on the substrate 130. The light source circuit 140 is supplied with current from the power supply circuit 160 and turns on the light source 141. The illuminance detection circuit 150 is a circuit having an illuminance sensor 151 mounted on the substrate 130. The illuminance detection circuit 150 outputs a signal representing the result of measuring the amount of light received by the illuminance sensor 151. When there are a plurality of illuminance sensors 151, the illuminance detection circuit 150 calculates the total amount of light received by the plurality of illuminance sensors 151. The power supply circuit 160 (LED lighting device) is supplied with power from the AC power supply AC and supplies current to the light source circuit 140. The power supply circuit 160 includes, for example, a diode bridge and an AC / DC conversion circuit. The current detection circuit 170 detects a current supplied from the power supply circuit 160 to the light source circuit 140.
The control circuit 300 adjusts the current that the power supply circuit 160 supplies to the light source circuit 140 based on the light amount detected by the illuminance detection circuit 150 and the current measured by the current detection circuit 170. The control circuit 300 generates a control signal that controls the power supply circuit 160. The control circuit 300 controls the power supply circuit 160 so that the light amount detected by the illuminance detection circuit 150 matches the target light amount. That is, if the light quantity detected by the illuminance detection circuit 150 is smaller than the target light quantity, the power supply circuit 160 is controlled so that the current supplied from the power supply circuit 160 to the light source circuit 140 is increased. On the contrary, if the light quantity detected by the illuminance detection circuit 150 is larger than the target light quantity, the power supply circuit 160 is controlled to reduce the current supplied from the power supply circuit 160 to the light source circuit 140. When the current detected by the current detection circuit 170 reaches the maximum rated value of the light source circuit 140, the control circuit 300 causes the power supply circuit 160 to operate the light source circuit even if the light amount detected by the illuminance detection circuit 150 is smaller than the target light amount. The power supply circuit 160 is controlled so as not to further increase the current supplied to 140. If the power supply circuit 160 supplies a current exceeding the maximum rated value of the light source circuit 140 to the light source circuit 140, the life of the light source 141 becomes extremely short, or the light source 141 breaks down (open failure, short circuit failure, etc.). is there.

FIG. 4 is a block configuration diagram showing an example of the configuration of the control circuit 300 in this embodiment.
The control circuit 300 includes an initial energization detection unit 310, a target light amount storage unit 380, a control signal generation unit 390, and an optimum signal input unit 320. The control circuit 300 (control unit) is, for example, a microcomputer. The microcomputer includes a processing device that executes a program, a nonvolatile and volatile storage device that stores programs and data, and an input device and an output device that input and output signals to and from other circuits. A microcomputer implement | achieves functional blocks, such as a first time electricity supply detection part 310, the target light quantity memory | storage part 380, and the control signal production | generation part 390, when a processing apparatus runs a program.
The first energization detection unit 310 detects whether or not the lighting device 100 is energized for the first time after factory shipment. For example, the initial energization detection unit 310 determines that the energization is the first energization after factory shipment when the target light amount storage unit 380 does not store the target light amount.
The target light amount storage unit 380 stores the target light amount. The target light quantity storage unit 380 does not store the target light quantity when shipped from the factory. The target light amount storage unit 380 stores the light amount detected by the illuminance detection circuit 150 as the target light amount when the initial energization detection unit 310 determines that the first energization is performed after factory shipment.

The control signal generation unit 390 is based on the detection result of the initial energization detection unit 310, the target light amount stored by the target light amount storage unit 380, the light amount detected by the illuminance detection circuit 150, and the current detected by the current detection circuit 170. Thus, a control signal for controlling the power supply circuit 160 is generated.
The optimum signal input unit 320 inputs an optimum signal. The optimum signal indicates whether or not the current light amount of the lighting device 100 is a desired light amount. The optimum signal indicates whether the current light amount of the lighting device 100 is too bright or too dark when the desired light amount is not reached.
For example, an operator who performs the mounting operation of the lighting device 100 turns on the test after the mounting of the lighting device 100 is completed, and measures whether the brightness of the lighting device 100 is as designed using an illuminometer or the like. . For example, in a general office space illuminance design, the desk top surface illuminance may be designed to be 750 lx. The operator inputs an optimum signal to the lighting device 100 based on the measurement result.
For example, the optimum signal input unit 320 has a dedicated connector for inputting an optimum signal, and an operator connects the optimum signal input device to the connector and inputs the optimum signal. Alternatively, the optimum signal input unit 320 may be configured to input an optimum signal via an infrared light receiving unit for a remote controller.

When the initial energization detection unit 310 determines that the first energization after factory shipment (initial setting mode), the control signal generation unit 390 refers to the current detected by the current detection circuit 170 while the power supply circuit 160 is the light source circuit. The power supply circuit 160 is controlled so that the current supplied to 140 is, for example, 70% of the maximum rated value of the light source circuit 140. Based on the optimum signal input by the optimum signal input unit 320, the control signal generation unit 390 reduces the current supplied from the power supply circuit 160 to the light source circuit 140 when the lighting device 100 has too much current light. The power supply circuit 160 is controlled. On the other hand, when the current light amount of the lighting device 100 is too small, the control signal generation unit 390 controls the power supply circuit 160 so that the current supplied from the power supply circuit 160 to the light source circuit 140 is increased. However, when the current supplied from the power supply circuit 160 to the light source circuit 140 reaches the maximum rated value of the light source circuit 140, the control signal generation unit 390 does not increase the current supplied from the power supply circuit 160 to the light source circuit 140 any more. When the current supplied from the power supply circuit 160 to the light source circuit 140 reaches the maximum rated value of the light source circuit 140 while the light source 141 is new, the current supplied from the power supply circuit 160 to the light source circuit 140 is further increased. Therefore, if the amount of light from the light source 141 decreases due to deterioration over time, the light emission amount of the lighting device 100 cannot be kept constant. For this reason, the current supplied from the power supply circuit 160 to the light source circuit 140 when the light source 141 is new may be, for example, 80% of the maximum rated value. That is, when the current supplied from the power supply circuit 160 to the light source circuit 140 reaches 80% of the maximum rated value of the light source circuit 140, the control signal generation unit 390 further increases the current supplied from the power supply circuit 160 to the light source circuit 140. Do not increase. Thereby, at least until the light quantity of the light source 141 falls to about 80%, the emitted light quantity of the illuminating device 100 can be kept constant.
In addition, when the optimum signal input unit 320 inputs an optimum signal indicating that the current light amount of the lighting device 100 is too small even though the current supplied from the power supply circuit 160 to the light source circuit 140 has reached the upper limit, The illuminating device 100 may be configured to notify the operator of this by blinking the light source 141 or a warning sound.

  The target light quantity storage unit 380 determines that the first energization detection unit 310 determines that the first energization is performed after shipment from the factory, and the current light quantity of the illumination device 100 is desired based on the optimum signal input by the optimum signal input unit 320. If it is a light amount, the light amount detected by the illuminance detection circuit 150 is stored as a target light amount.

  When the first energization detection unit 310 determines that the energization is performed for the second time or later after factory shipment (normal mode), the control signal generation unit 390 refers to the light amount detected by the illuminance detection circuit 150 while the current detection circuit 170 The power supply circuit 160 is controlled so that the light amount detected by the illuminance detection circuit 150 approaches the target light amount stored in the target light amount storage unit 380 within a range where the detected current does not exceed the maximum rated value of the light source circuit 140.

FIG. 5 is a flowchart showing the flow of the lighting process S600 in this embodiment.
In the lighting process S600, the lighting apparatus 100 turns on the light source 141. The lighting process S600 includes an initial energization detection step S611, a set value lighting step S612, a target light amount storage step S614, and an adjustment lighting step S620. When power supply from the AC power supply AC to the lighting apparatus 100 starts, the control circuit 300 starts operation and starts processing from the initial energization detection step S611.
In the initial energization detection step S611, the initial energization detection unit 310 detects whether or not this is the first energization after factory shipment. In the case of the first energization, the control circuit 300 advances the process to the set value lighting step S612. In the case of energization for the second time and thereafter, the control circuit 300 advances the process to the adjustment lighting step S620.
In the set value lighting step S612, the control signal generation unit 390 controls the power supply circuit 160 so that the current supplied from the power supply circuit 160 to the light source circuit 140 matches the current set value. The initial value of the current setting value is, for example, 70% of the maximum rated value of the light source circuit 140. The control circuit 300 advances the process to the optimum signal input step S613.
In the optimum signal input step S613, the optimum signal input unit 320 inputs an optimum signal.
If the light amount of the illumination device 100 is an appropriate light amount based on the optimal signal input by the optimal signal input unit 320, the control circuit 300 advances the processing to the target light amount storage step S614.
When the light amount of the illumination device 100 is not an appropriate light amount, the control signal generation unit 390 changes the current set value and returns the process to the set value lighting step S612. When the light amount of the lighting device 100 is larger than the appropriate light amount, the control signal generation unit 390 decreases the current setting value. When the light amount of the illumination device 100 is less than the appropriate light amount and the current set value is smaller than the predetermined maximum current set value, the control signal generation unit 390 increases the current set value.
In the set value lighting step S612, the control signal generation unit 390 controls the power supply circuit 160 so that the power supplied from the power supply circuit 160 to the light source circuit 140 is 70% of the maximum rated value of the light source circuit 140. Thereby, the light source 141 is turned on, and the illuminance sensor 151 receives the light emitted from the light source 141.
In the target light quantity storage step S614, the target light quantity storage unit 380 stores the light quantity detected by the illuminance detection circuit 150 as the target light quantity. The control circuit 300 advances the process to the adjustment lighting step S620.
In the adjustment lighting step S620, the control signal generation unit 390 determines that the amount of light detected by the illuminance detection circuit 150 is within the range in which the current supplied from the power supply circuit 160 to the light source circuit 140 does not exceed the maximum rated value of the light source circuit 140. The power supply circuit 160 is controlled to match the target light amount stored in the light amount storage unit 380. The control circuit 300 repeats the adjustment lighting step S620 until the power supply from the AC power source AC to the lighting device 100 is stopped.

  When the power supply from the AC power source AC to the lighting device 100 is stopped before the optimum signal input unit 320 inputs the optimum signal indicating that the light amount of the lighting device 100 is a desired light amount, the target light amount storage unit The lighting process S600 ends without 380 storing the target light amount. When power supply from the AC power supply AC to the lighting device 100 is started next time, the target light amount storage unit 380 does not store the target light amount, and therefore the initial energization detection unit 310 determines that the first energization after factory shipment. Thereby, the control circuit 300 performs an initial adjustment process (set value lighting step S612 to target light amount storage step S614).

  In this way, even when the initial illuminance of the light source 141 varies, the target light amount of the illumination device 100 can be made constant, and the light emission of the illumination device 100 can be compensated for by compensating for the decrease in light amount due to aging of the light source 141. The amount can be kept constant.

  The light amount of the light source 141 gradually decreases due to aging. The target light amount storage unit 380 stores the light amount detected by the illuminance detection circuit 150 according to the light emission amount when the light source 141 is new. The control signal generation unit 390 adjusts the light emission amount of the light source 141 with this as a target. That is, when the light emission amount of the light source 141 decreases, the current supplied from the power supply circuit 160 to the light source circuit 140 is increased correspondingly, and the light emission amount of the lighting device 100 is kept constant. Since the target light amount is set based on the light amount that emits light with a current of, for example, 70% of the maximum rated value when the light source 141 is new, the current that the power supply circuit 160 supplies to the light source circuit 140 is the maximum of the light source circuit 140. With the rated value, even when the light emission amount of the light source 141 drops to about 70%, the light emission amount can be made almost the same as when it is new. That is, the lighting device 100 can maintain a substantially constant brightness until the light source 141 reaches the end of its life.

Even when the light source 141 reaches the end of its life, since the lighting device 100 maintains a substantially constant brightness, the user may continue to use the lighting device 100 without replacing it. When the light emission amount of the light source 141 is less than about 70%, the light emission amount of the lighting device 100 is kept constant even when the power supply circuit 160 supplies the light source circuit 140 with a current corresponding to the maximum rated value of the light source circuit 140. Can not. Therefore, as the light emission amount of the light source 141 decreases, the brightness of the lighting device 100 decreases. As a result, the user can be prompted to replace the lighting device 100. Further, since the power supply circuit 160 does not supply power exceeding the maximum rated value of the light source circuit 140 to the light source circuit 140, the deterioration of the light source 141 is not accelerated.
Further, since the light shielding unit 210 blocks outside light, the illuminance detection circuit 150 can detect only light emitted from the light source 141. It is possible to suppress a decrease in illuminance due to aged deterioration of the light source 141 and realize long-term light emission at a preset illuminance. The shortening of the service life due to the overcurrent flowing through the light source 141 can be prevented.
When the light source 141 is new, the current supplied to the light source circuit 140 is set to, for example, 70% of the maximum rated value of the light source circuit 140, and the target light amount storage unit 380 determines the light amount detected by the illuminance detection circuit 150. As a light source 141 is new, the current supplied to the light source circuit 140 is made equal to the maximum rated value of the light source circuit 140, and the amount of light detected by the illuminance detection circuit 150 is set to a predetermined initial value such as 70%. The target light quantity storage unit 380 may store the value obtained by multiplying the correction value as the target light quantity.

Embodiment 2. FIG.
The second embodiment will be described with reference to FIGS.
In addition, about the part which is common in Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.
The lighting device 100 in this embodiment reduces the labor of adjustment work when the lighting device 100 is attached by storing the relationship measured in advance.

FIG. 6 is a perspective view showing the external appearance of the illumination device 100 according to this embodiment.
The lighting device 100 includes a housing 110, a reflection unit 120, a light source 141, an illuminance sensor 151, and a light shielding unit 220.
The light shielding part 220 (reflective light shielding plate) has a planar plate shape and is formed of an opaque material that does not transmit light. The light shielding unit 220 includes an operation unit 221, a light source opening 222, and a sensor opening 223. The light shielding unit 220 is arranged to be slidable in the horizontal direction. The operation unit 221 is a part for sliding the light shielding unit 220 by applying a finger of the user. The light source opening 222 is provided at a position corresponding to the light source 141. The light source opening 222 is a through hole for emitting light emitted from the light source 141 to the outside. The light source opening 222 has a long shape in the direction in which the light shielding unit 220 slides so that the light emitted from the light source 141 can be emitted to the outside even if the light shielding unit 220 slides to any position. The sensor opening 223 is provided at a position corresponding to the illuminance sensor 151. The sensor opening 223 is a through hole for allowing the illuminance sensor 151 to receive light from the outside. When the light shielding unit 220 is slid, the sensor opening 223 is displaced from the position corresponding to the illuminance sensor 151, and the illuminance sensor 151 can prevent light from the outside from being received.

FIG. 7 is an enlarged sectional view in side view showing the structure of the illumination device 100 in this embodiment.
The light source 141 and the illuminance sensor 151 are mounted on the same surface of the substrate 130. The light shielding unit 220 includes a partition wall 224. The partition wall 224 is disposed between the light source opening 222 and the sensor opening 223. The partition wall 224 is on the back side of the light shielding unit 220 and closes the space between the substrate 130.
When the light shielding unit 220 is slid so that the illuminance sensor 151 receives external light through the sensor opening 223, the partition wall 224 blocks the gap between the light source 141 and the illuminance sensor 151, and the light source 141. Is blocked so that the illuminance sensor 151 does not receive the light.

FIG. 8 is an enlarged sectional view in side view showing the structure of the illumination device 100 in this embodiment.
A partition wall opening 225 is provided in the partition wall 224. When the light shielding unit 220 is slid so that the illuminance sensor 151 does not receive light from the outside, a partition wall opening 225 comes between the light source 141 and the illuminance sensor 151. Thereby, the illuminance sensor 151 receives light emitted from the light source 141 through the partition opening 225. The light emitted from the light source 141 is reflected on the back side of the light shielding unit 220 and reaches the illuminance sensor 151.

  That is, depending on the position of the light shielding unit 220, the illuminance sensor 151 receives light emitted from the light source 141 (hereinafter referred to as “constant light emission mode”) and the illuminance sensor 151 receives light from the outside (hereinafter referred to as “constant light emission mode”). It is possible to switch between two modes, called “constant illuminance mode”.

FIG. 9 is a block configuration diagram showing the configuration of the illumination device 100 according to this embodiment.
In addition to the configuration described in Embodiment 1, lighting device 100 further includes mode detection unit 180.
The mode detection unit 180 detects the position of the light shielding unit 220 to detect whether it is the constant light emission mode or the constant illuminance mode, and outputs a signal indicating the detection result. For example, the mode detection unit 180 is a switch that contacts the light shielding unit 220 and is turned on / off.

FIG. 10 is a block configuration diagram showing the configuration of the control circuit 300 in this embodiment.
The control circuit 300 includes a dimming degree input unit 330, a light emission relationship storage unit 340, an illuminance relationship storage unit 350, a target light amount calculation unit 385, and a control signal generation unit 390.
The dimming degree input unit 330 inputs the dimming degree. The dimming degree represents the brightness at which the lighting device 100 is turned on. For example, the dimming degree input unit 330 inputs a dimming degree by inputting a pulse width modulated dimming signal. Alternatively, the dimming degree input unit 330 inputs the dimming degree by receiving an infrared signal transmitted by a remote controller operated by the user.

The light emission relationship storage unit 340 stores in advance a relationship between the dimming degree of the lighting device 100 and the amount of light detected by the illuminance detection circuit 150 when the lighting device 100 is turned on with the dimming degree. For example, the light emission relationship storage unit 340 stores the relationship between the dimming degree and the light amount in a tabular format. Or the light emission relationship memory | storage part 340 memorize | stores the coefficient of the approximation formula (for example, linear equation) which approximates the relationship between a light control degree and a light quantity.
The relationship between the dimming degree and the light amount is calculated based on, for example, a lighting test performed on each lighting device 100 and the measurement result, and the light emission relationship storage unit 340 stores the calculated relationship. Alternatively, a lighting test is performed for one lighting device 100, and the same relationship is stored in the light emission relationship storage unit 340 for the same type of lighting device 100.
The illuminance relationship storage unit 350 includes the dimming degree of the illumination device 100, the amount of light detected by the illuminance detection circuit 150 when the illuminance sensor 151 receives the light reflected by the object illuminated by the light emitted by the illumination device 100, and The relationship between is stored in advance.
The target light amount calculation unit 385 calculates the target light amount based on the dimming degree input by the dimming degree input unit 330. When the mode detected by the mode detection unit 180 is the constant light emission mode, the target light amount calculation unit 385 calculates the target light amount based on the relationship between the dimming degree and the light amount stored in the light emission relationship storage unit 340. When the mode detected by the mode detection unit 180 is the constant illuminance mode, the target light amount calculation unit 385 calculates the target light amount based on the relationship between the dimming degree and the light amount stored in the light emission relationship storage unit 340.
The control signal generation unit 390 calculates the light amount detected by the illuminance detection circuit 150 and the target light amount calculation unit 385 within a range where the current supplied from the power supply circuit 160 to the light source circuit 140 does not exceed the maximum rated value of the light source circuit 140. The power supply circuit 160 is controlled so that the target light amount matches.

FIG. 11 is a flowchart showing the flow of the lighting process S600 in this embodiment.
The lighting process S600 includes a dimming degree input step S631, a mode detection step S633, a target light amount calculation step S634, and an adjustment lighting step S620. When power supply from the AC power supply AC to the lighting apparatus 100 starts, the control circuit 300 starts operation and starts processing from the dimming degree input step S631.
In the dimming degree input step S631, the dimming degree input unit 330 inputs the dimming degree.
In the mode detection step S633, the mode detection unit 180 detects a mode.
In the target light amount calculation step S634, the target light amount calculation unit 385 adjusts the light emission relationship storage unit 340 stored when the mode detected by the mode detection unit 180 in the mode detection step S633 is the constant light emission mode (external light blocking mode). Based on the relationship between the light intensity and the light amount, the light amount corresponding to the light intensity input by the light intensity input unit 330 in the light intensity input step S631 is calculated. When the mode detected by the mode detection unit 180 in the mode detection step S633 is the constant illuminance mode (external light detection mode), the target light amount calculation unit 385 determines the relationship between the dimming degree and the light amount stored by the light emission relationship storage unit 340. Based on this, the light amount corresponding to the dimming degree input by the dimming degree input unit 330 in the dimming degree input step S631 is calculated.

  In the constant light emission mode, in the adjustment lighting step S620, the control signal generation unit 390 causes the illuminance detection circuit 150 to fall within a range where the power supplied from the power supply circuit 160 to the light source circuit 140 does not exceed the maximum rated value of the light source circuit 140. The power supply circuit 160 is controlled so that the amount of light detected by coincides with the amount of light calculated by the target light amount calculation unit 385 in the target light amount calculation step S634. The control circuit 300 returns the process to the dimming degree input step S631. The control circuit 300 repeats this until the power supply from the AC power supply AC to the lighting apparatus 100 is stopped.

  As described above, the relationship between the dimming degree of the lighting device 100 and the amount of light detected by the illuminance detection circuit 150 is measured in advance and stored in the light emission relationship storage unit 340, so that the lighting device 100 can be installed at the installation site. It is possible to reduce the labor of adjustment work.

  In the constant illuminance mode, the illuminance sensor 151 does not directly receive the light emitted from the light source 141, but receives the light reflected by the object illuminated by the light emitted from the light source 141. Since the object to be illuminated is illuminated not only by the light emitted from the light source 141 but also by other light such as external light, the amount of light detected by the illuminance detection circuit 150 is not the amount of light emitted by the light source 141 but the illuminated light. It is proportional to the illuminance of the object. The control signal generation unit 390 controls the power supply circuit 160 so that the light amount detected by the illuminance detection circuit 150 matches the target light amount. In other words, the lighting device 100 is lit with such brightness that the illuminance of the illuminated object is constant. For example, when there is sunlight from the outside of the window, the lighting device 100 is lit dark. Thereby, energy saving can be aimed at.

As described above, the constant light emission mode and the constant illuminance mode can be easily switched, and the illuminance sensor 151 is shared by both modes. Therefore, it is possible to save energy while suppressing the manufacturing cost of the lighting device 100. Since the external light is blocked in the constant light emission mode, the illuminance sensor 151 can detect the light emitted by the light source 141. In the constant illuminance mode, all the light emitted from the light source 141 is radiated to the outside, so that the light emission efficiency of the lighting device 100 can be increased. Can be detected.
Note that the shape of the light shielding unit 220 is an example, and the light shielding unit 220 may be configured to move in the vertical direction instead of sliding in the horizontal direction, or may be configured to move by rotating. Good.

Embodiment 3 FIG.
The third embodiment will be described with reference to FIGS.
In addition, about the part which is common in Embodiment 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  Illumination device 100 in this embodiment is between the dimming degree and the amount of light detected by illuminance sensor 151 and detected by illuminance detection circuit 150 in the environment where illumination device 100 is installed. , And the illuminance relationship storage unit 350 stores the relationship.

FIG. 12 is a block configuration diagram showing the configuration of the control circuit 300 in this embodiment.
The control circuit 300 further includes an optimum signal input unit 320 in addition to the configuration described in the fourth embodiment. The optimum signal input unit 320 inputs an optimum signal. The optimum signal indicates whether the illuminance of the object to be illuminated is a desired illuminance. The optimum signal indicates whether the illuminance of the illuminated object is too bright or too dark when the illuminance of the illuminated object is not a desired illuminance.
The illuminance relationship storage unit 350 stores in advance a relationship between the dimming degree of the lighting device 100 and the amount of light detected by the illuminance sensor 151 when the illuminance sensor 151 receives the light reflected by the illuminated object. . However, the relationship between the dimming degree and the light amount stored in the illuminance relationship storage unit 350 is generally only appropriate to some extent, and is not necessarily optimal for the environment where the lighting device 100 is installed. It is not a thing. The illuminance relationship storage unit 350 adjusts the stored relationship based on the optimum signal input by the optimum signal input unit 320 to optimize the relationship.

  When the optimum signal input by the optimum signal input unit 320 indicates that the illuminance of the object to be illuminated is too bright, the illuminance relationship storage unit 350 stores the light intensity corresponding to the dimming degree input by the dimming degree input unit 330. Reduce the amount of light. On the contrary, when the optimum signal input by the optimum signal input unit 320 indicates that the illuminance of the object to be illuminated is too dark, the illuminance relationship storage unit 350 stores the light intensity corresponding to the dimming degree input by the dimming degree input unit 330. Increase the amount of light that is being used. The target light amount calculation unit 385 calculates the light amount changed by the illuminance relationship storage unit 350 as the target light amount. The control signal generation unit 390 calculates the light amount detected by the illuminance detection circuit 150 and the target light amount calculation unit 385 within a range where the current supplied from the power supply circuit 160 to the light source circuit 140 does not exceed the maximum rated value of the light source circuit 140. The power supply circuit 160 is controlled so that the target light amount matches. Thereby, when the illuminance of the object to be illuminated is too bright, the light emitted from the lighting device 100 becomes weak, and when the illuminance of the object to be illuminated is too dark, the light emitted from the lighting device 100 becomes strong.

FIG. 13 is a flowchart showing the flow of the lighting process S600 in this embodiment.
The lighting process S600 further includes an optimum signal input determination process S615 and an illuminance relation adjustment process S616 in addition to the processes described in the fourth embodiment.
In the adjustment lighting step S620, the control signal generation unit 390 determines the amount of light detected by the illuminance detection circuit 150 within a range in which the current supplied from the power supply circuit 160 to the light source circuit 140 does not exceed the maximum rated value of the light source circuit 140. Then, the power supply circuit 160 is controlled to match the target light amount calculated by the target light amount calculation unit 385 in the target light amount calculation step S634. When the mode detected by the mode detection unit 180 in the mode detection step S633 is the constant light emission mode, the control circuit 300 returns the process to the dimming degree input step S631. When the mode detected by the mode detection unit 180 in the mode detection step S633 is the constant illuminance mode, the control circuit 300 advances the process to the optimum signal input determination step S615.
In the optimum signal input determination step S615, the optimum signal input unit 320 inputs the optimum signal if the optimum signal is transmitted to the lighting device 100. When the optimum signal input by the optimum signal input unit 320 indicates that the illuminance of the object to be illuminated is not the desired illuminance, the control circuit 300 advances the process to the illuminance relation adjustment step S616. When the optimum signal input by the optimum signal input unit 320 indicates that the illuminance of the object to be illuminated is a desired illuminance, or when the optimum signal input unit 320 does not input the optimum signal, the control circuit 300 The process returns to the dimming degree input step S631.
In the illuminance relationship adjustment step S616, the illuminance relationship storage unit 350 adjusts the relationship between the stored dimming degree and the light amount based on the optimum signal input by the optimum signal input unit 320 in the optimum signal input determination step S615. The control circuit 300 returns the process to the dimming degree input step S631.
The control circuit 300 repeats this until the power supply from the AC power supply AC to the lighting apparatus 100 is stopped.

Thereby, the illumination intensity suitable for the environment where the illuminating device 100 was installed can be adjusted.
The illuminance relationship storage unit 350 is configured not only to increase / decrease the amount of light corresponding to the current dimming level, but also to increase / decrease the amount of light corresponding to other dimming levels while maintaining a proportional relationship based on the optimum signal. There may be. By doing so, it is not necessary to make adjustments for each dimming degree, so that the labor of adjustment work can be reduced.
In addition, unlike the second embodiment, the lighting device 100 according to this embodiment performs an initial adjustment process not only at the first energization after shipment from the factory but also when an optimum signal is input. This is because readjustment may be necessary due to room redesign.

Embodiment 4 FIG.
Embodiment 4 will be described with reference to FIG.
In addition, about the part which is common in Embodiment 3, the same code | symbol is attached | subjected and description is abbreviate | omitted.
Illumination device 100 in this embodiment switches illuminance and mode in accordance with a user operation input by the remote controller.

FIG. 14 is a perspective view showing the external appearance of the remote controller in this embodiment.
The remote control includes, for example, an illuminance setting unit, an external light mode switching unit, a light emission mode switching unit, and a setting mode switching unit.
The illuminance setting unit has, for example, an operation button operated by the user. The illuminance setting unit sets the illuminance in the living room according to the user's operation. Since the illuminance required in the living room varies depending on the usage, the illuminance setting unit is used from a plurality of different illuminances, for example, whether the illuminance setting value is left at the default value of 750 lx or changed to 1000 lx. Set the illuminance selected by the person. The illuminance setting unit generates an illuminance setting value signal representing the set illuminance setting value, and transmits the illuminance setting value signal to the illumination device 100.
The external light mode switching unit has, for example, an operation button operated by the user. The external light mode switching unit switches between the external light mode and the light shielding mode in accordance with a user operation. The external light mode switching unit generates an external light mode switching signal indicating switching between the external light mode and the light shielding mode, and transmits the external light mode switching signal to the illumination device 100.
The light emission mode switching unit has, for example, an operation button operated by the user. The light emission mode switching unit switches between the constant light emission mode and the constant illuminance mode in accordance with a user operation. The light emission mode switching unit is for the user to manually switch to the constant light emission mode when the brightness is temporarily required in the constant illuminance mode. The light emission mode switching unit generates a light emission mode switching signal indicating switching between the constant light emission mode and the constant illuminance mode, and transmits the light emission mode switching signal to the illumination device 100.
The setting mode switching unit has, for example, an operation button operated by the user. The setting mode switching unit switches between the illuminance setting mode and the normal mode. The setting mode switching unit is for the user to manually switch to the setting mode when the illuminance setting becomes necessary again due to, for example, changing the partition. The setting mode switching unit generates a setting mode switching signal indicating switching between the illuminance setting mode and the normal mode, and transmits the setting mode switching signal to the illumination device 100.

In the illuminating device 100, the light shielding unit 220 is not manually moved by the user, but is moved by the power of a motor or the like based on the external light mode switching signal transmitted by the remote controller. In the external light mode, the light blocking unit 220 moves to a position where the illuminance sensor 151 receives light from the outside. In the light blocking mode, the light blocking unit 220 moves to a position where the illuminance sensor 151 does not receive light from the outside and the illuminance sensor 151 receives light emitted from the light source 141.
Based on the external light mode switching signal transmitted by the remote controller, the mode detection unit 180 determines in principle that it is the constant illuminance mode in the external light mode and the constant light emission mode in the light shielding mode. However, when the light emission mode switching signal transmitted from the remote controller indicates the constant light emission mode, the mode detection unit 180 determines that the light emission mode is the constant light emission mode even in the external light mode.
The optimum signal input unit 320 inputs an optimum signal when the first energization is performed after shipment from the factory or when the setting mode switching signal transmitted from the remote controller represents the illuminance setting mode. Thereby, the illuminating device 100 performs an initial adjustment process. In other cases, the optimum signal input unit 320 does not input an optimum signal. This prevents the lighting device 100 from executing the initial adjustment process due to the input of an optimal signal that is not intended by the user.

Embodiment 5 FIG.
The fifth embodiment will be described with reference to FIGS.
In addition, about the part which is common in Embodiment 1- Embodiment 4, the same code | symbol is attached | subjected and description is abbreviate | omitted.

FIG. 15 is a perspective view showing an external appearance of the illumination device 100 according to this embodiment.
The illumination device 100 is a long line illumination. The lighting device 100 includes a housing 110, substrates 131 and 132, two types of light sources 141 and 142, an illuminance sensor 151, and the like. The housing 110 (light source arrangement portion) has a groove 111. The groove portion 111 has a long groove shape, and the light sources 141 and 142 and the illuminance sensor 151 are arranged inside. The light source 141 and the light source 142 have different emission colors. By adjusting the amount of light emitted from the light source 141 and the amount of light emitted from the light source 142, the lighting device 100 can generate light of various colors between the two emission colors. For example, the light source 141 is day white, the light source 142 is light bulb color, and the lighting device 100 generates light having various correlated color temperatures between day white and light bulb color. The light sources 141 and 142 are mounted on the substrate 131. The substrate 131 is disposed on the inner side surface of the groove 111. The illuminance sensor 151 is mounted on the substrate 132. The substrate 132 is disposed on the inner bottom surface of the groove 111.
Although not shown, the lighting device 100 may have a translucent diffuser plate at a position that covers the groove 111.

FIG. 16 is a plan view showing the structure of the illumination device 100 according to this embodiment.
On the substrate 131, two types of light sources 141 and light sources 142 are alternately arranged in a straight line. The lighting device 100 includes two substrates 131 arranged to face each other. The position where the light source 141 is arranged on one substrate 131 and the position where the light source 142 is arranged on the other substrate 131 are opposed to each other. That is, the light source 141 and the light source 142 are arranged to face each other, and the color mixture of the light emitted from the two light sources 141 and 142 proceeds.
A plurality of illuminance sensors 151 are arranged on the substrate 132 in a substantially straight line on the longitudinal center axis of the substrate 132. The position of the illuminance sensor 151 is preferably a position where the light emitted from the light source 141 and the light emitted from the light source 142 are received almost evenly.

FIG. 17 is an enlarged cross-sectional view in side view showing the structure of lighting apparatus 100 in this embodiment.
The two substrates 131 facing each other are arranged substantially perpendicular to the substrate 132. The illuminance sensor 151 is disposed substantially on the center line of the substrate 132 and receives light emitted from the light source 141 and light emitted from the light source 142 substantially evenly. Note that the illuminance sensor 151 faces the opening direction of the groove 111 and does not have a light shielding portion, and therefore receives not only light emitted from the light sources 141 and 142 but also other light.

FIG. 18 is a block configuration diagram showing the configuration of the control circuit 300 in this embodiment.
The control circuit 300 includes two light source circuits 140a and 140b, an illuminance detection circuit 150, two power supply circuits 160a and 160b, two current detection circuits 170a and 170b, and two switching circuits 190a and 190b.
The light source circuit 140 a is a circuit having the light source 141 among the two types of light sources 141 and 142 mounted on the two substrates 131. The light source circuit 140a turns on the light source 141 in response to the supply of the current output from the power supply circuit 160a. The power supply circuit 160a converts electric power supplied from the AC power supply AC into current supplied to the light source circuit 140a. The current detection circuit 170a detects a current supplied from the power supply circuit 160a to the light source circuit 140a. The switching circuit 190a cuts off power supply from the power supply circuit 160a to the light source circuit 140a in accordance with an instruction from the control circuit 300.
The light source circuit 140b, the power supply circuit 160b, the current detection circuit 170b, and the switching circuit 190b have the same operations as the light source circuit 140a, the power supply circuit 160a, the current detection circuit 170a, and the switching circuit 190a. Note that a portion that can be shared by the power supply circuit 160a and the power supply circuit 160b (for example, a diode bridge) may be shared.
The illuminance detection circuit 150 is a circuit having an illuminance sensor 151 mounted on the substrate 132, and outputs a signal indicating the total amount of light received by the illuminance sensor 151.
The control circuit 300 controls the switching circuits 190a and 190b to turn on and off the two types of light sources 141 and 142, and based on the light amount detected by the illuminance detection circuit 150 at each timing, The amount of light emitted by 142 is calculated. In the control circuit 300, the current supplied from the power circuit 160a to the light source circuit 140a does not exceed the maximum rated value of the light source circuit 140a, and the current supplied from the power circuit 160b to the light source circuit 140b does not exceed the maximum rated value of the light source circuit 140b. The power supply circuits 160a and 160b are controlled so that the calculated light quantity matches the target light quantity within the range.

FIG. 19 is a block configuration diagram showing the configuration of the control circuit 300 in this embodiment.
The control circuit 300 includes a dimming degree input unit 330, a color temperature input unit 335, a color temperature relation storage unit 360, a target light amount calculation unit 385, a timer unit 371, a switch drive unit 372, a light amount calculation unit 373, and two control signal generation units. 390a and 390b. The dimming degree input unit 330 inputs the dimming degree. The color temperature input unit 335 inputs a correlated color temperature desired by the user. The color temperature relationship storage unit 360 stores in advance a relationship between a set of the dimming degree and the correlated color temperature and a set of the light quantity of the light source 141 and the light quantity of the light source 142. Based on the relationship stored in the color temperature relationship storage unit 360, the target light amount calculation unit 385 has a light source 141 corresponding to the dimming degree input by the dimming degree input unit 330 and the correlated color temperature input by the color temperature input unit 335. And the target light quantity of the light source 142 is calculated.
The time measuring unit 371 measures the elapsed time and notifies the switch driving unit 372 that the predetermined time has passed every time a predetermined interval (for example, 100 milliseconds) elapses.
The switch driving unit 372 generates drive signals for driving the two switching circuits 190a and 190b, respectively. Normally, the switch drive unit 372 generates a drive signal that turns on both the two switching circuits 190a and 190b. Upon receiving a notification from the timer 371, the switch driver 372 generates a drive signal for turning off one or both of the two switching circuits 190a and 190b for a predetermined time (for example, 1 millisecond). To do.
The light amount calculation unit 373 calculates the light amount of light emitted from the light source 141 and the light amount of light emitted from the light source 142 based on the light amount detected by the illuminance detection circuit 150. The light amount calculation unit 373 inputs the light amount detected by the illuminance detection circuit 150 at the timing when the light source 141 and the light source 142 are turned on / off based on the drive signal generated by the switch drive unit 372, and the input light amount Based on the above, the amount of light emitted from each of the light source 141 and the light source 142 is calculated. For example, the light amount calculation unit 373 calculates the switching circuit 190a from the light amount detected by the illuminance detection circuit 150 when the two switching circuits 190a and 190b are turned on (that is, when the two types of light sources 141 and 142 are both turned on). Is turned off, and when the switching circuit 190b is turned on (that is, when the light source 141 is turned off and the light source 142 is turned on), the light amount of the light source 141 is calculated by subtracting the light amount detected by the illuminance detection circuit 150. Is calculated. Alternatively, the light amount calculation unit 373 calculates 2 from the light amount detected by the illuminance detection circuit 150 when the switching circuit 190a is on and the switching circuit 190b is off (that is, when the light source 141 is in the on state and the light source 142 is in the off state). The light amount of the light source 141 is calculated by calculating a difference obtained by subtracting the light amount detected by the illuminance detection circuit 150 when the two switching circuits 190a and 190b are off (that is, when the two types of light sources 141 and 142 are both turned off). Is calculated. Similarly, for the light source 142, the light amount calculation unit 373 calculates the illuminance when the switching circuit 190a is on and the switching circuit 190b is off from the light amount detected by the illuminance detection circuit 150 when the two switching circuits 190a and 190b are on. When the two switching circuits 190a and 190b are off from the difference obtained by subtracting the light quantity detected by the detection circuit 150 or the light quantity detected by the illuminance detection circuit 150 when the switching circuit 190a is off and the switching circuit 190b is on. The light amount of the light source 142 is calculated by calculating a difference obtained by subtracting the light amount detected by the illuminance detection circuit 150.

The control signal generation unit 390a generates a control signal that controls the power supply circuit 160a. The control signal generation unit 390a determines that the light amount of the light source 141 calculated by the light amount calculation unit 373 is within the range in which the current supplied from the power supply circuit 160a to the light source circuit 140a does not exceed the maximum rated value of the light source circuit 140a. The power supply circuit 160a is controlled so as to approach the target light amount of the light source 141 calculated by the calculation unit 385.
The control signal generation unit 390b also performs the same operation as the control signal generation unit 390a.

FIG. 20 is a flowchart showing the flow of the lighting process S600 in this embodiment.
The lighting process S600 includes a dimming degree input step S631, a color temperature input step S632, a target light amount calculation step S634, an adjustment lighting step S620, a timing step S641, a turn-off step S642, a first lighting step S643, a second lighting step S644, and a light amount measurement. It has process S645, both lighting process S646, light quantity measurement process S647, and light quantity calculation process S648.
In the dimming degree input step S631, the dimming degree input unit 330 inputs the dimming degree.
In the color temperature input step S632, the color temperature input unit 335 inputs the correlated color temperature.
In the target light amount calculation step S634, the target light amount calculation unit 385 determines the dimming degree input unit 330 in the dimming degree input step S631 based on the dimming degree stored in the color temperature relationship storage unit 360 and the relationship between the correlated color temperature and the light quantity. The light amounts of the light source 141 and the light source 142 corresponding to the set of the input dimming degree and the correlated color temperature input by the color temperature input unit 335 in the color temperature input step S632 are calculated.
In the adjustment lighting step S620, the control signal generation unit 390a calculates the light amount calculation unit 373 for the light source 141 within a range in which the power supplied from the power supply circuit 160a to the light source circuit 140a does not exceed the maximum rated value of the light source circuit 140a. The power supply circuit 160a is controlled so that the target light amount calculation unit 385 matches the light amount calculated for the light source 141 in the target light amount calculation step S634. The control signal generation unit 390b has a target light amount calculation step in which the light amount calculated by the light amount calculation unit 373 for the light source 142 is within a range in which the current supplied from the power circuit 160b to the light source circuit 140b does not exceed the maximum rated value of the light source circuit 140b In step S634, the power supply circuit 160b is controlled so that the target light amount calculation unit 385 matches the light amount calculated for the light source 142.
In the time measuring step S641, the time measuring unit 371 measures the elapsed time. If the predetermined interval has not yet elapsed, the control circuit 300 returns the process to the dimming degree input step S631. When the predetermined interval has elapsed, the time measuring unit 371 notifies the switch driving unit 372 of that fact. When the predetermined interval has passed for the first time, the switch driving unit 372 advances the processing to the extinguishing step S642. When the predetermined interval has passed for the second time, the switch drive unit 372 advances the process to the first lighting step S643. When the predetermined interval has passed for the third time, the switch driving unit 372 advances the processing to the second lighting step S644. When the predetermined interval has passed for the fourth time or later, the switch driving unit 372, based on the remainder obtained by dividing the number of times that the predetermined interval has elapsed by 3, if the remainder is 1, the remainder goes to the extinguishing step S642. If it is 2, the process proceeds to the first lighting process S643, and if the remainder is 0, the process proceeds to the second lighting process S644.
In the extinguishing step S642, the switch driving unit 372 turns off the two switching circuits 190a and 190b. The control circuit 300 advances the process to the light quantity measurement step S645.
In the first lighting step S643, the switch driving unit 372 turns on the switching circuit 190a and turns off the switching circuit 190b. The control circuit 300 advances the process to the light quantity measurement step S645.
In the second lighting step S644, the switch driver 372 turns off the switching circuit 190a and turns on the switching circuit 190b. The control circuit 300 advances the process to the light quantity measurement step S645.
In the light amount measurement step S645, the light amount calculation unit 373 acquires the light amount detected by the illuminance detection circuit 150.
In both lighting steps S646, the switch driving unit 372 turns on both the two switching circuits 190a and 190b.
In the light amount measurement step S647, the light amount calculation unit 373 acquires the light amount detected by the illuminance detection circuit 150.
In the light amount calculation step S648, the light amount calculation unit 373 calculates the light amounts of the light emitted from the light source 141 and the light source 142 based on the light amount acquired in the light amount measurement step S645 and the light amount acquired in the light amount measurement step S647, respectively. .

Thus, the light source is determined based on the difference between the light amount detected by the illuminance detection circuit 150 when the light sources 141 and 142 are turned on and the light amount detected by the illuminance detection circuit 150 when the light sources 141 and 142 are turned off. Since the amount of light emitted from 141 and 142 is calculated, it is not necessary to provide a light shielding portion. Since the time during which the light sources 141 and 142 are turned off for the light quantity measurement is, for example, only 1 millisecond out of 100 milliseconds, it cannot be detected by human eyes, and is continuously turned on. appear.
Since the amount of light emitted from the plurality of types of light sources 141 and 142 is individually detected and controlled so as to match each of the target light amounts, the lighting device 100 can emit light having desired chromaticity coordinates. In addition, since the current exceeding the maximum rated value is not supplied to the light sources 141 and 142, it is possible to prevent the life of the light sources 141 and 142 from being shortened.

  DESCRIPTION OF SYMBOLS 100 Illumination device, 110 housing | casing, 111 groove part, 120 reflection part, 130-132 board | substrate, 140 light source circuit, 141, 142 light source, 150 illumination intensity detection circuit, 151 illumination intensity sensor, 160 power supply circuit, 170 current detection circuit, 180 mode detection , 190 switching circuit, 210, 220 light-shielding part, 211 top surface part, 212 outer cone part, 213 outer daylight hole, 214 inner cone part, 215 inner daylight hole, 221 operation part, 222 light source opening part, 223 sensor opening part Part, 224 partition, 225 partition opening, 300 control circuit, 310 initial energization detection part, 320 optimum signal input part, 330 dimming degree input part, 335 color temperature input part, 340 light emission relation storage part, 350 illuminance relation storage part, 360 color temperature storage unit, 371 timing unit, 372 switch drive unit, 3 3 light amount calculating section, 380 a target light amount storing unit, 385 target light amount calculating section, 390 a control signal generator, AC AC power supply.

Claims (7)

A light source;
An illuminance sensor that receives light and measures the amount of light received;
A power supply circuit for supplying current to the light source;
The power supply circuit is connected to the light source so that the amount of light measured by the illuminance sensor approaches a predetermined target light amount within a range where the current supplied to the light source by the power supply circuit does not exceed the maximum rated value of the light source. And a controller for adjusting a current supplied to the lighting device. The lighting device includes a flat plate-like substrate and a light shielding unit,
The light source is mounted on one side of the substrate,
The illuminance sensor is mounted on the same surface of the substrate on which the light source is mounted,
The light-shielding portion is located substantially in front of the illuminance sensor, blocks light other than the light emitted from the light source, prevents the illuminance sensor from receiving light, reflects the light emitted from the light source, and reflects the illuminance. The illumination device according to claim 1, wherein the sensor receives light. The light shielding unit is movable to a position where the illuminance sensor can receive light other than light emitted from the light source,
The lighting device has a plurality of operation modes including a constant light emission mode and a constant illuminance mode,
The light shielding unit moves to a position where the light intensity sensor blocks light other than the light emitted from the light source so that the illuminance sensor does not receive light in the constant light emission mode, and the light emitted from the light source in the constant light intensity mode. Move to a position where the illuminance sensor can receive light other than
The control unit adjusts a current supplied to the light source by the power supply circuit so that an amount of light emitted from the light source approaches a predetermined target light amount in the constant light emission mode. The lighting device according to claim 2, wherein the power supply circuit adjusts the current supplied to the light source so that the illuminance of an object illuminated by light emitted from the light source approaches a predetermined target illuminance. The lighting device is
A light source arrangement portion having a long groove-like groove portion;
Two or more light sources,
The two or more light sources are arranged opposite to each other on the inner side surface of the groove,
The illumination device according to claim 1, wherein the illuminance sensor is disposed on an inner bottom surface of the groove. The lighting device is
A light emission relationship storage unit that stores the relationship between the amount of light emitted from the light source, the illuminance of an object illuminated by the light emitted from the light source, and the amount of light measured by the illuminance sensor;
Based on the amount of light measured by the illuminance sensor and the relationship stored by the light emission relationship storage unit, the control unit controls the power supply circuit so that the amount of light emitted by the light source approaches a predetermined target light amount. The lighting device according to claim 1, wherein an amount of current supplied to the light source is adjusted. The lighting device has a plurality of the light sources,
The control unit adjusts a current that the power supply circuit supplies to the first light source based on an amount of light measured by the illuminance sensor when the first light source among the plurality of light sources emits light. The power supply circuit is configured based on the amount of light measured by the illuminance sensor when a second light source that emits light of the same or different color as the light emitted from the first light source among the plurality of light sources emits light. 6. The lighting device according to claim 1, wherein a current supplied to the second light source is adjusted. The lighting device has a plurality of operation modes including an illuminance setting mode and a normal mode,
The lighting device is
In the illuminance setting mode, a target light amount storage unit that stores the amount of light measured by the illuminance sensor,
The control unit adjusts the amount of current supplied to the light source by the power supply circuit so that the amount of light emitted from the light source approaches the light amount stored in the target light amount storage unit in the normal mode. The illumination device according to any one of claims 1 to 6, wherein

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