JP5742015B2 - Lighting device - Google Patents

Description

  The present invention relates to an illuminating device that is used by being attached to a timetable or the like of a bus stop and that emits a light source by power supplied from a secondary battery charged with a solar cell.

  Conventionally, bus stops on local bus routes are sometimes provided in places where there is no power supply and there are no external lights around them. At such bus stops, it is difficult to see the timetable and route map at night. There was a problem. Furthermore, since it is difficult to see from a place where the bus stop itself is far away, it has become very inconvenient for passengers who are unfamiliar with bus use.

  On the other hand, there is an illuminating device provided at a bus stop to improve the visibility of a night timetable and route map (Patent Document 1). According to the illuminating device disclosed in Patent Document 1, a secondary battery is charged by feeding with a solar battery in the daytime, and the light source is turned on by feeding the light source from the secondary battery at night to illuminate the timetable. . This improves the visibility of the night timetable by illuminating the timetable and route map even at a bus stop without a power source.

JP 2005-93137 A

  However, according to the illuminating device of Patent Document 1, it is difficult to secure electric power for turning on the illuminating device for a long time at night only by the amount of charge generated by solar cell power generation during the daytime. When the battery runs out at night, the lighting device is turned off, so that the user cannot see the timetable and route map, and there is a possibility that the location of the bus stop may not be known.

  In view of the above circumstances, an object of the present invention is to provide an illumination device that can be used for a long time without using an external power source while illuminating a timetable and route map in an easy-to-see manner at night.

The lighting device of the present invention includes a “solar cell, a storage battery housed in a housing and charged with power of the solar cell, a light source that is provided in the housing and emits light using power of the storage battery, A human sensor that is provided in a housing and detects presence of a person in the vicinity; charge control means that controls power supply from the solar battery to the storage battery; and power supply from the storage battery to the light source, A dimming unit capable of causing the light source to emit light at a plurality of brightness levels, wherein the dimming unit emits a first light when the human sensor does not detect a person while discharging from the storage battery. The light source is caused to emit light in a state, and the light source is caused to emit light in a second light emission state that is brighter than the first light emission state based on detection of the presence of a person in the human sensor, and the light source emits the second light emission When emitting light in a state, the dimming means Characterized by wherein "altering the light emission state of the light source after a constant time has elapsed from the second emission state to the first light emission state.

According to the lighting device of the present invention, at night, when the human sensor does not detect the presence of a person, the light control means causes the light source to emit light in the first light emission state, and when the human sensor detects the presence of a person, The light source is caused to emit light by switching to a second light emission state that is brighter than the light emission state. In other words, when the human sensor does not detect the presence of a person, the brightness of the light source is lowered, and if the presence of a person is detected, control is performed to increase the brightness. Suppresses the consumption of the storage battery. In addition, even when there is no user, the lighting device emits light in the first light emission state, thereby making it easy to visually recognize the presence of the bus stop from a remote location. Further, when the voltage of the storage battery decreases and does not reach the predetermined power supply voltage, the dimming means dimmes the first power-saving light-emitting state and the second power-saving light-emitting state which are darker than the normal light-emitting state. This suppresses power consumption and prevents battery exhaustion.

  The dimming circuit is not particularly limited in configuration, and may be one that changes the luminance in stages, or one that gradually changes or increases the luminance.

Further, the present invention, when "the light source emits light with the second light emission state, the control unit or the light control circuit, the second light emission state to the light emitting state of the light source after a predetermined time has elapsed it may alternatively be changed "to the first emission state from.

  According to this configuration, the light emission state of the light source can be changed from the second light emission state to the first light emission state having a lower luminous intensity based on the passage of time by the control of the light control means. Thereby, when reducing the brightness | luminance of a light source, the switch by a human operation is not required, but it suppresses power consumption reliably.

  Further, the present invention provides a “solar cell, a storage battery housed in a casing and charged by the power of the solar battery, a light source provided in the casing and emitting light by the power of the storage battery, and the casing. A human sensor for detecting the presence of a person in the surroundings, charge control means for controlling power feeding from the solar battery to the storage battery, controlling power feeding from the storage battery to the light source, A dimming unit capable of emitting light at a plurality of brightness levels and a control unit including a flashing control timer for measuring time, and when the control unit turns on the light source, the flashing control timer When the measurement time of the blinking control timer reaches a first predetermined time, the light source is turned off, and the measurement time of the blinking control timer is longer than the first predetermined time. 2 Reached the predetermined time Until the measurement time of the blinking control timer reaches the second predetermined time, the measurement time of the blinking control timer is initialized and the light source can be turned on. When the light source can be turned on and the voltage of the solar cell is equal to or lower than a predetermined value and the human sensor does not detect a person, the control unit causes the light source to emit light in a first light emission state, and the person The light source may be caused to emit light in a second light emission state that is brighter than the first light emission state based on detection of the presence of a person in the sensor.

  According to this configuration, in addition to the output control based on the detection of the human sensor, the light source is turned on and off according to the voltage of the solar cell and the measurement time of the blinking control timer. According to this, when the measurement time of the blinking control timer exceeds the first predetermined time, the light source is turned off and discharge of the storage battery is suppressed. In addition, after the measurement time exceeds the first predetermined time and the light source is turned off, the light source cannot be turned on until the second predetermined time is exceeded. Accordingly, after the light source is turned on until the first predetermined time, the light source is turned off to suppress the discharge of the storage battery, and the risk that the light source starts to turn on from an early time due to the influence of the weather or the like and consumes the battery early is prevented. .

  As described above, according to the lighting device of the present invention, the dimming means changes the luminance of the light source based on the detection of the presence of the person by the human sensor, so that when there is a user, the timetable and the route map are displayed. It is possible to provide an illuminating device that can be used for a long time without using an external power source by illuminating in an easy-to-view manner and suppressing power consumption when there is no user.

The perspective view of the illuminating device which is 1st embodiment of this invention. The top view of an illuminating device. The bottom view of an illuminating device. Explanatory drawing which shows the cross section between the A-A 'lines of FIG. The block diagram which shows the outline of the circuit structure of an illuminating device. The flowchart which shows the flow of control of an illuminating device. The timing chart explaining the flow of control of an illuminating device. The perspective view which showed the illuminating device which is 2nd embodiment of this invention from the upper right diagonally forward. The perspective view which showed the illuminating device of 2nd embodiment from the lower right diagonally back. The flowchart which shows the flow of control of the illuminating device of 2nd embodiment. The 6th page figure of the illuminating device of 2nd embodiment. The reference drawing explaining the structure of the illuminating device of 2nd embodiment. The reference perspective view explaining the structure of the illuminating device of 2nd embodiment. The schematic diagram explaining LED lighting time of the illuminating device of 3rd embodiment. The block diagram which shows the outline of the circuit structure of the illuminating device of 3rd embodiment. The flowchart which shows the flow of the main control of the illuminating device of 3rd embodiment. The flowchart which shows the flow of the lighting mode control of the illuminating device of 3rd embodiment. The flowchart which shows the flow of the power saving mode control of the illuminating device of 3rd embodiment. The flowchart which shows the flow of charge mode control of the illuminating device of 3rd embodiment.

(First embodiment)
Hereinafter, the illuminating device 1 which is 1st embodiment of this invention is demonstrated based on FIGS. FIG. 1 is a perspective view showing the lighting device obliquely from the upper left, FIG. 2 is a plan view of the lighting device, FIG. 3 is a bottom view of the lighting device, and FIG. It is sectional drawing between -A 'lines. FIG. 5 is a block diagram illustrating an outline of a circuit configuration of the lighting device, FIG. 6 is a flowchart illustrating a flow of control of the lighting device, and FIG. 7 is a time chart illustrating control of the lighting device.

  As shown in FIGS. 1 to 3, the lighting device 1 is configured by providing a housing 5 with a solar cell 2, an LED 4 as a light source, and a human sensor 6. The casing 5 is formed as a long member having a substantially C-shaped cross section made of aluminum as a raw material by extrusion molding. As shown in FIG. 4, the housing 5 is hollow and an accommodation space 18 is formed. The storage space 18 houses the storage battery 3, the LED board 22, the human sensor board 26, and the control board 12 (see FIG. 5). On the bottom surface side of the housing 5, a light source pit 17 is formed which has a recessed shape inside the housing and has an opening 19 in the back. A reflective plate 15 is attached to the opening 19, and the light source pit 17 is a recess that opens downward. Small holes 23 are formed in the reflecting plate 15 at positions corresponding to the four LEDs 4 mounted on the LED substrate 22. The LED 4 protrudes into the light source pit 17 through the small hole 23 and can emit light toward the lower side of the housing 5. A curved plate-like light source cover 14 made of transparent plastic is attached to the light source pit 17 to protect the LED 4 from being directly exposed to the outside while transmitting the light of the LED 4. Here, the LED 4 corresponds to the light source of the present invention.

  Side plates 13 are attached and closed on both sides of the housing 5. The side plate 13 is fixed with screws (not shown) and is detachable. At the time of assembly or maintenance of the lighting device 1, the side plate 13 can be removed to open the side of the housing 5, and the storage battery 3, LED board 22, and control board 12 in the accommodation space 18 can be attached and detached. On the back side of the housing 5, there is provided an attachment portion 29 for attaching the lighting device 1 to a pillar or wall using a joint such as a bolt or a metal fitting. In addition, in order to prevent theft and mischief, all coupling tools such as screws for fixing the side plate 13 and other screws exposed to the outside of the lighting device 1 have shapes that are difficult to attach and detach with a general tool. Is used.

  As shown in FIG. 4, the housing 5 has a substantially C-shaped cross section that opens downward. The upper surface 10 has a depressed central portion on which the solar cell 2 is mounted, and the front surface 20 has a smooth curved surface. Yes. The lower surface 11 of the lighting device 1 with the light source cover 14 mounted on the housing 5 presents a visually continuous curved surface from the front surface 20 to the light source cover 14 and the rear lower surface 24. The front surface 20 is provided with a plurality of lateral grooves 21 at substantially equal intervals.

  The solar cell 2 is configured such that a silicon solar cell module is accommodated in a transparent plastic cover member having a box shape with a curved upper surface, and a screw 25 is provided on the upper surface 10 of the housing 5. Fixed. The maximum output voltage of the solar cell 2 of this example is 1.3W. The solar cell module of the solar cell 2 is sealed in a cover member and has excellent weather resistance.

  The storage battery 3 is a nickel metal hydride battery, and is connected to the solar battery 2 via the charge control circuit 7 (see FIG. 5) of the control board 12. The capacity of the storage battery 3 in this example is 1600 mA and the voltage is 4.8V. The LED substrate 22 is attached to the lower part of the housing space 18, and the LED 4 protrudes into the light source pit 17 through the small hole 23 as described above. A human sensor substrate 26 including the human sensor 6 is also attached to the lower part of the housing space 18. The human sensor 6 extends downward through the through holes 16 and 27, and the front end of the human sensor 6 is exposed to the outside. It arrange | positions so that it may expose.

  As shown in FIG. 5, the control board 12 includes a CPU 9, a charge control circuit 7, a dimming circuit 8, a ROM 27, a timer 28, and the like. The CPU 9 controls the charge control circuit 7 and the light control circuit 8 based on the voltage of the solar battery 2, the voltage of the storage battery 3, and the human body detection signal of the human sensor 6. The CPU 9 obtains time information to be referred to for control such as dimming from the ROM 27 and the timer 28. The charge control circuit 7 is connected to the solar battery 2 and the storage battery 3, and controls power feeding from the solar battery 2 to the storage battery 3 based on a charge control signal sent from the CPU 9. The dimming circuit 8 can change the luminance of the LED 4 gradually and gradually. The CPU 9 sends a dimming control signal to the dimming circuit 8 based on the information selected from the information regarding the light emission state of the LED 4 stored in the ROM 27 to control the power supply from the storage battery 3 to the LED substrate 22. Here, the combination of the charge control circuit 7 and the CPU 9 corresponds to the charge control means of the present invention, and the combination of the dimming circuit 8, the CPU 9, the ROM 27 and the timer 28 corresponds to the dimming means of the present invention. To do.

  Hereinafter, based on FIGS. 5-7, operation | movement of the illuminating device 1 is demonstrated in detail. As shown in FIG. 6, the illuminating device 1 detects the voltage of the solar cell 2, and determines whether it is more than the predetermined value which is a threshold value which performs charge (S1). When the voltage of the solar cell 2 exceeds a predetermined value, the CPU 9 sends a charge control signal to the charge control circuit 7 so as to charge the battery, and feeds the storage battery 3 from the solar cell 2 to charge the storage battery 3. (S2). Since the CPU 9 keeps the operation of the dimming circuit stopped, the LED 4 continues to be turned off. On the other hand, when the voltage of the solar cell 2 is less than the predetermined value, the CPU 9 sends a charge control signal to the charge control circuit 7 so as to stop the charge, and sends a dimming control signal to the dimming circuit 8. Send. Based on the dimming control signal, the dimming circuit 8 supplies power to the LED board 22 and causes the LED 4 to emit light in the standby mode (S3). In this standby mode S3, 2.5% of the rated current flows through the LED 4. In other words, after charging the storage battery 3 during the day, when the power generation amount of the solar battery 2 falls below a predetermined value at sunset or the like, the lighting device 1 lights the LED 4 continuously with a weak output as the standby mode S3. Let The amount of light of the LED 4 in the standby mode S3 is insufficient for easily illuminating the timetable and the like, but the presence of the bus stop is visible even from a remote location.

  When the lighting device 1 lights up the LED 4 in the standby mode S3, if a person such as a bus passenger approaches the lighting device 1 and the presence of the human body is detected by the human sensor 6, the human sensor 6 A human body detection signal is sent to the CPU 9 (S4). Upon receiving the human body detection signal, the CPU 9 sends a dimming control signal to the dimming circuit 8 to cause the LED 4 to emit light in the illumination mode (S5). In the illumination mode S5, 100% of the rated current flows through the LED 4. That is, as the person approaches, the lighting device 1 enters the lighting mode S5, turns on the LED 4 with high brightness, and illuminates the route map, timetable, and the like below the lighting device 1. If the presence or movement of a human body remains undetected for a predetermined time (for example, 10 seconds) during the illumination mode S5, the dimming circuit 8 gradually decreases the luminance of the LED 4 and changes the light emission state of the LED 4 to the standby mode S3 equivalent. Transition (S6, S7). When the human sensor 6 detects the presence or movement of the human body and sends a human body detection signal to the CPU 9 before changing to the standby mode S3, illumination with 100% output is resumed as the illumination mode (S5, S6). As shown in FIG. 7, by increasing the brightness of the LED 4 only for a predetermined time immediately after the human body detection signal is generated by the human sensor 6, the time for the LED 4 to emit light at a high output is greatly reduced. As a result, power is saved and the duration of the storage battery is lengthened compared to the case of always lighting at a constant output.

  In the morning, when sunlight is obtained and the voltage of the solar cell rises above a predetermined value, the LED 4 is turned off and charging of the storage battery 3 is started (S1, S2). If the voltage of the storage battery 3 falls below the required voltage of the LED 4 before the voltage of the solar battery rises above a predetermined value, the LED 4 is turned off due to insufficient voltage. And if the voltage of a solar cell rises more than predetermined value, the charge to the storage battery 3 will be started with LED4 light-extinguishing (S1, S2).

  As described above, according to the lighting device 1 according to the embodiment of the present invention, when the human sensor 6 does not detect the presence of a person at night, the LED 4 emits light in the standby mode S3, and the human sensor 6 Is detected, the light source is made to emit light by switching to the illumination mode S5 brighter than the standby mode S3. This prevents wasteful consumption of storage battery power when there are no passengers near the bus stop.

  By the way, in order to suppress power consumption, a method of simply suppressing the luminance of the light source or periodically blinking it can be considered. However, if the brightness of the light source is suppressed or the LED is blinked, the visibility of the route map and the timetable is significantly impaired. On the other hand, according to the lighting device 1, the brightness of the LED 4 is increased when the user approaches the bus stop and the presence of the person is detected by the human sensor 6. Can provide.

  Moreover, according to the lighting device 1, even when the user is not near the bus stop, the LED 4 is caused to emit light in the standby mode, so that the presence of the bus stop can be easily seen from a place away from the bus stop even at night. .

  Further, according to the lighting device 1, the control of the light control circuit 8 refers to the ROM 27 and the timer 28, and starts from the human body detection of the human sensor 6 to change from the lighting mode to the standby mode based on the passage of time. The light emission state can be gradually changed. Thereby, unlike the case where the switch is switched manually, the switching is not forgotten, so that the standby mode can be maintained while the person is unattended, and the power consumption can be reliably suppressed. Further, by gradually changing the luminous intensity of the LED 4, it is possible to prevent the user from being surprised or inconvenienced by suddenly turning off the light.

  Moreover, according to the illuminating device 1, since the rainwater which flows down the front surface 20 is stopped by the horizontal groove 21, rainwater becomes difficult to drip from the front surface 20 side at the time of a slight rain. This prevents the user from feeling uncomfortable due to rainwater dripping in front of the lighting device 1.

(Second embodiment)
Next, based on FIGS. 8-13, 2nd embodiment of this invention provided with the light control function which adjusts the light emission state of LED4 according to the remaining capacity of the storage battery 3 is described. FIG. 8 is a perspective view showing the lighting device 101 according to the second embodiment of the present invention from the diagonally upper right side, and FIG. 9 is a perspective view showing the lighting device 101 from the diagonally lower right side. 10 is a flowchart showing a flow of control of the lighting apparatus 101. In addition, in FIGS. 8-10, about the structure substantially common with the illuminating device 1 which is 1st embodiment, it shows using the same code | symbol as 1st embodiment. Detailed description of the internal structure is omitted.

  FIG. 11 is a six-sided view of the illumination device 101. FIG. 12 is a reference diagram for explaining the configuration of the lighting device 101, and is a reference bottom view showing the transparent portion, a reference bottom view showing the inside through the transparent portion, and between DD and EE. Includes reference enlarged sectional view and reference sectional view showing names of respective parts. FIG. 13 is a reference perspective view for explaining the configuration of the illumination device 101.

  As shown in FIGS. 8 and 9, the lighting device 101 has a simpler configuration than the lighting device 1, a solar cell 102 is mounted on the upper surface of the housing 105, and has a substantially C-shaped cross section. A storage battery, an LED board, a control board, and a human sensor board (all of which are not shown) are housed in a housing 105 having a housing space (not shown) therein. The solar cell 102 has a flat appearance. The upper surface 110 of the housing 105 is also formed flat, and the lighting device 101 has an appearance without a large undulation on the upper surface. A protective cover 114 that protects the LED while transmitting the light of the LED is provided on the bottom surface side of the lighting device 101. Moreover, the front-end | tip part of the human sensitive sensor 6 is exposed. The lighting device 101 has a back surface 131 formed flat so that it can be directly attached to a wall or a plate, and two attachment portions 129 for receiving fasteners such as bolts are provided.

  As shown in FIG. 11 to FIG. 13, the lighting device 101 is an outdoor lighting device in which a photovoltaic power generation unit is provided on the upper surface side of the main body and an LED of a light source is provided on the bottom surface side. The solar power generation unit generates power and charges a built-in secondary battery. After sunset, power is supplied from the secondary battery to turn on the LED to perform illumination. A transparent cover that covers the LEDs is provided on the bottom side of the article. Further, the presence sensor of the present article detects the presence of a person and controls the lighting and dimming of the LED.

  Next, the control flow of the illumination device 101 will be described with reference to FIG. Unlike the lighting device 1, the lighting device 101 determines whether or not the voltage of the storage battery is equal to or higher than a predetermined value when the LED is turned on at night (Yes in S1), and according to the determination result. Control to determine the operation. When the voltage of the storage battery is equal to or higher than a predetermined value, that is, in a sufficiently charged state, similarly to the description of the control flow of the lighting device 1 described above, the operation is performed by switching between the standby mode and the lighting mode. .

  When the amount of charge during the day is insufficient, or when the remaining capacity of the storage battery decreases due to lighting of the LED, if the storage battery voltage decreases below a predetermined value (No in S11), the process proceeds to the power saving standby mode S13. In the power saving standby mode, the LED is lit at a rated 1.25% output corresponding to 50% of the normal standby mode S3 by duty ratio control. When the presence of a person is detected in the power saving standby mode S13 (S14), the process shifts to the power saving lighting mode S15, and the LED is turned on with an output of 50% of the rated value corresponding to 50% of the normal lighting mode S5. The If the state where the presence of a person is not detected continues from the power saving lighting mode S15 (No in S16), the light is dimmed (S17) to return to the initial state. However, since the voltage of the storage battery is lowered, the power saving standby mode is resumed. The operation at S13 is continued.

  According to the illuminating device 101, when the voltage of the storage battery decreases and does not reach a predetermined power supply voltage, dimming is performed darker than the normal light emission state, thereby suppressing power consumption and preventing the battery from running out. When the voltage of the storage battery is equal to or higher than the predetermined voltage, the dimming circuit turns on the LED with an output of 2.5% in the standby mode and 100% in the illumination mode, and the voltage of the storage battery 3 is lower than the predetermined voltage The LED is turned on at an output of 1.25% in the power saving standby mode and 50% in the power saving lighting mode with a duty ratio of 50%. As a result, the power consumption in the standby mode and the illumination mode is about 50% of the rating with respect to the normal light emission state, and the duration of the remaining battery is extended about twice. Thus, in addition to the dimming control based on the human body detection signal of the human sensor 6, by controlling the output of the LED, that is, the luminance according to the remaining capacity of the storage battery, it is possible to further suppress the power consumption more finely. For example, even when the capacity of the storage battery is quickly reduced, such as when the sunshine during the day is insufficient, the battery life at night can be extended and the convenience of the bus stop can be improved.

(Third embodiment)
Next, based on FIGS. 14-19, 3rd embodiment of this invention is described in detail. FIG. 14 is a schematic diagram for explaining the LED lighting time of the lighting device of the third embodiment, FIG. 15 is a block diagram showing an outline of the circuit configuration, and FIG. 16 is a flowchart showing the flow of main control. FIG. 17 is a flowchart showing a flow of lighting mode control, FIG. 18 is a flowchart showing a flow of power saving mode control, and FIG. 19 is a flowchart showing a flow of charge mode control.

  In the first and second embodiments of the present invention, when the voltage of the solar cell is detected and the detected voltage is less than a predetermined voltage as a threshold for performing charging (determined as sunset), The LED 4 is turned on, and the LED 4 is turned off when the detected voltage is equal to or higher than a predetermined voltage (determined to be sunny). In this case, there is a problem that the power loss is large because the light continues to be lit until the next morning even after midnight after the bus operation ends, and continues to operate for other than the necessary time (see FIG. 14A).

  Therefore, in the present embodiment, as shown in FIG. 15, in addition to the configuration of the first embodiment or the second embodiment, an LED that detects the time for starting off and lighting in the standby mode or the illumination mode. Is provided on the control board 12. That is, the voltage of the solar cell is detected, and when the detected voltage does not reach the predetermined voltage (determined as sunset), the LED 4 is turned on and time measurement is started by the ON-OFF timer. For example, when 8 hours (= T1) is measured, the LED is turned off (see S101 to S103 and S150 in FIG. 16). In this way, the LED can be turned off at midnight exceeding the bus operating time (for example, after 24:00), and wasteful power consumption can be prevented (see FIG. 14B). The timer 30 for ON-OFF may be configured such that the timer 28 in the first embodiment also functions as the timer 30 for ON-OFF. Here, the ON-OFF timer 30 corresponds to the blinking control timer of the present invention, and T1 corresponds to the first predetermined time of the present invention.

  Further, when the measurement time of the ON-OFF timer exceeds, for example, 12 hours (= T2), the voltage of the solar cell is detected, and the LED 4 is turned on when the detected voltage is less than the predetermined voltage. (Refer to S101 to S104 in FIG. 16). Conventionally, for example, even in the early morning of winter, there is a problem in that the sky is dim and it is difficult to see the operation table posted at the bus stop even at the time when the bus operation started. However, in this way, even if the sky is dim and it is difficult to see the bus stop schedule, as in the early morning of winter, the LED lights up, providing enough light to read the bus schedule can do. Thereafter, when the voltage of the solar cell detects a predetermined voltage or more, the LED is turned off. Alternatively, the time may be further measured with an ON-OFF timer, and the LED may be turned off, for example, 3 hours (= T3) after the LED is turned on (see FIG. 14C). Here, T2 corresponds to the second predetermined time of the present invention.

  When the measurement time of the ON-OFF timer exceeds 12 hours, for example, the voltage of the solar cell is detected, and if the detected voltage is equal to or higher than the predetermined voltage, it is necessary to turn on the LED. Absent. This is because there is enough ambient illumination to read the bus schedule.

  Next, in 3rd embodiment, control of LED and a storage battery performed based on the output voltage of a solar cell and the output voltage of a storage battery is demonstrated. The ROM 27 stores three predetermined voltages, a normal voltage, an operating voltage, and a lower limit voltage, as predetermined reference values regarding the output voltage of the storage battery, and these are in a relationship of normal voltage> operating voltage> lower limit voltage. As will be described in detail later, when the output voltage of the storage battery 3 is equal to or higher than the normal voltage, the LED 4 is caused to emit light by the output of the lighting mode control. The LED 4 is caused to emit light by mode control. While the storage battery 3 is being charged, charging is continued if the output voltage of the storage battery 3 is lower than the operating voltage even if the output voltage is equal to or higher than the lower limit voltage.

  Hereinafter, the flow of control will be described for main control, lighting mode control, power saving mode control, and charging mode control. In the state where the output voltage of the storage battery 3 is charged to be higher than the normal voltage in the main control (FIG. 16), when the sunlight received by the solar battery is weakened and the voltage of the solar battery 2 falls below a predetermined value (Yes in S101) ) The measurement time of the ON-OFF timer 30 is T2 or more because 12 hours or more have elapsed since the measurement time was last reset (No in S102 and Yes in S103), and the ON-OFF The measurement time of the timer 30 is reset (S104). Since the measurement time is reset and becomes less than T1 (No in S102), the lighting mode control is performed (S105 to S106).

  As shown in FIG. 17, in the lighting mode control, standby mode lighting is started in which the LED 4 is lit at an output of 2.5% of the rating (S201). When the human sensor 6 detects the presence of a human body (Yes in S202), lighting mode lighting for turning on the LED 4 at 100% of the rated value is started (S203). While the human sensor 6 is continuously detecting the human body (Yes in S204), the lighting mode lighting is continued. When human detection is no longer performed by the human sensor 6 (No in S204), the control board 12 gradually reduces the output of the LED 4 to reduce the light (S205). When the human sensor 6 detects a human body after starting dimming (Yes in S206), the illumination mode is turned on. When the output of the LED 4 decreases to 2.5% (Yes in S207), the process returns to the main control.

  When the LED 4 is turned on and the discharge of the storage battery 3 proceeds and the voltage of the storage battery 3 becomes less than the normal voltage (No in S105 and Yes in S107), the lighting device 100 performs power saving mode control S108. As shown in FIG. 18, in the power saving mode control, power saving standby mode lighting is started in which the output of the LED 4 is lit at an output of 1.25% of the rating (S301). When the human sensor 6 detects the presence of a human body (Yes in S302), lighting mode lighting for turning on the LED 4 at 50% of the rating is started (S303). While the human sensor 6 continuously detects the human body (Yes in S304), the lighting mode lighting is continued. As in the case of the lighting mode control, when human detection is no longer performed by the human sensor 6 (No in S304), the control board 12 gradually reduces the LED output to reduce the light (S305). When the human sensor 6 detects a human body after starting dimming (Yes in S306), the illumination mode is turned on. When the output of the LED 4 decreases to 1.25% (Yes in S307), the process returns to the main control.

  When the voltage of the storage battery further decreases and becomes lower than the lower limit voltage (No in S107), the process proceeds to charge mode control S109, and as shown in FIG. 19, the LED 4 is turned off and charging of the storage battery 3 is started (S150 to S151). ). While the storage battery 3 is being charged, the LED 4 is not turned on until the voltage of the storage battery 3 is charged to be equal to or higher than the operating voltage, and the storage battery 3 is continuously charged (S152 to S153). Even after being charged above the operating voltage, charging is continued when the output voltage of the solar cell 2 is equal to or higher than the predetermined value (No in S101), that is, while there is sunshine. When the output voltage of the solar cell 2 is less than a predetermined value, that is, when the sunshine is scarce and charging does not proceed, the LED 4 remains off and the standby is continued until the output voltage of the solar cell 2 increases (S152 to S153). .

  As described above, when the voltage of the storage battery 3 is equal to or higher than the normal voltage, the standby mode lighting with the LED output of 2.5% is continued, and when the human sensor 6 detects the human body, the LED output is turned on with the LED output of 100%. . When the voltage of the storage battery 3 is lower than the normal voltage and higher than the lower limit voltage, the power saving standby mode lighting with the LED output of 1.25% is continued, and when the human sensor 6 detects the human body, the LED output is turned on with 50%. To do. When the voltage of the storage battery 3 is less than the lower limit voltage, the LED 4 is turned off and charging is started.

  According to the above embodiment, the storage battery can be operated by switching between the mode of charging the storage battery 3 and the mode of lighting the LED 4 according to the voltage of the solar battery 2 and the measurement time of the ON-OFF timer 30. When the measurement time of the ON-OFF timer 30 exceeds T1, the LED 4 is turned off and the discharge of the storage battery 3 is suppressed. Further, after the LED 4 is turned off due to the measurement time exceeding T1, the LED 4 is not turned on until the measurement time exceeds T2, so the LED 4 starts from an early time when the sunshine is lowered due to the influence of the season or the weather. Suppresses starting of lighting. Thereby, the possibility that the discharge of the storage battery 3 proceeds at an early stage and turns off earlier than expected at night is prevented.

  In the above embodiment, T1 = 8 hours, T2 = 12 hours, and T3 = 15 hours. However, the present invention is not limited to this, and the relationship with the area, season, bus operating time, etc. is considered. Just decide.

  Moreover, in the said embodiment, although the timer for ON-OFF was provided and T1, T2, and T3 were made into the predetermined value, it replaced with the timer for ON-OFF, for example, equipped with IC with a calendar function, and needed for a passenger It may be executed by determining the date and time of turning on / off so that it does not turn on at midnight. Even if it does in this way, an effect can be acquired similarly to 3rd embodiment.

  Further, it is also possible to control the lighting / extinguishing of the LEDs by receiving signals originating from the first bus and the last bus. In this case, it is necessary to provide a signal receiving means for receiving a signal transmitted from the bus instead of the ON-OFF timer. Even if it does in this way, an effect can be acquired similarly to 3rd embodiment.

(Application examples)
The embodiment of the present invention is not limited to the two configurations described above, and can be variously modified as shown below.

  That is, in the above embodiment, the CPU 9 controls the LED 4 to select the light emission state and outputs a command to the light control circuit. However, the present invention is not limited to this. The circuit may be provided with a PWM module, and dimming may be performed by PWM control. A simple configuration can be achieved by performing dimming by duty ratio control by PWM.

  Further, the ROM 27 and the timer 28 are not necessarily provided on the substrate separately from the CPU 9, and the ROM 27 and the timer 28 may be built in the CPU 9. Thereby, the print pattern of a control board can be simplified.

  Furthermore, in the above embodiment, the charging control circuit 7 and the dimming circuit 8 are separately provided on the control board 12, but the present invention is not limited to this, and the charging control circuit 7 and the dimming circuit 8 are not limited thereto. It may be an integrated circuit configured to include. Further, the charging control circuit 7 and the dimming circuit 8 may be configured integrally with the CPU 9.

  The control board 12, the LED board 22, and the human sensor board 26 are not limited to those provided as separate boards, but are configured by providing a circuit on a common board. For example, each circuit of the control board 12, the LED board 22, and the human sensor board 26 may be provided on one board. Thereby, the structure can be simplified.

  In the above-described embodiment, the dimming is performed by switching between the standby mode S3 and the illumination mode S5 based on the detection of the presence of the person by the human sensor 6, but the present invention is not limited to this. Alternatively, dimming at three or more levels may be performed. For example, in addition to the standby mode S3 and the illumination mode S5, in a slightly dark situation such as evening or dawn, a mode in which the LED 4 emits light with a brightness of about 50% of the rating may be provided. By determining the ambient brightness based on the voltage of the solar cell, it is possible to control the operation of the lighting apparatus 1 by providing such an intermediate stage. Moreover, you may perform the light control which a brightness | luminance changes continuously without a step without providing a step.

  In the above embodiment, the solar cell 2 is shown as an example of the solar cell in which the solar cell module is housed in a transparent plastic cover having a shape in which the upper surface is curved and raised. However, the present invention is not limited thereto. For example, the solar cell may be a simpler flat plate or may be a sheet having flexibility, and various forms may be used.

  Although not particularly shown in the above embodiment, the charge control circuit 7 may have a protection function for preventing the storage battery 3 from being overcharged.

  The structure and control of the embodiment are not an inseparable combination, and the control of the second embodiment shown in FIG. 10 may be combined with the structure of the lighting device 1 of the first embodiment. You may combine control of 1st embodiment shown in FIG. 6 with respect to the structure of the illuminating device 101 of a form. In addition, various configurations can be employed without departing from the scope of the invention.

  Further, in the above embodiment, the power saving mode control has been shown to reduce the output of the LED 4 by about half compared to the lighting mode control, but is not limited to this, for example, the power saving mode control. Then, control may be performed so that a part of the LEDs 4 are extinguished while the output of each LED 4 is maintained to reduce the number of lighting. Thereby, the structure of the light control circuit 8 can be simplified.

  Moreover, in said embodiment, although the thing using a nickel hydride battery was shown as the storage battery 3, it cannot be overemphasized that it will not be limited to a nickel hydride battery if it is a secondary battery which can be charged / discharged repeatedly. Examples of other usable secondary batteries include lithium ion batteries and nickel cadmium batteries.

  By the way, in the above embodiment, the ON / OFF timer 30 has been shown to start measurement when the LED 4 is turned on, but is not limited to this, and the ON / OFF timer 30 is predetermined. The measurement time may be reset at the set time. For example, it may be reset every day at 2 o'clock every day, and T1 to T3 may be set based on that time. According to this, regardless of the time when the LED 4 starts to turn on, the LED 4 is turned off when a predetermined T1 elapses at a fixed time (for example, 10:00 at night). Similarly, when a predetermined T2 elapses and becomes on time (for example, 6:00 am), the LED 4 that has been turned off can be turned on. Thereby, it is possible to control the blinking of the lighting device in accordance with the bus operating hours regardless of changes in sunshine due to the season or weather. According to the above configuration, when the LED 4 is turned on in the dark in the morning, or when the output voltage of the solar cell 2 decreases due to the shade of the solar cell 2 during the daytime, it is turned on at an early time. The measurement time of the OFF timer 30 is reset, and the possibility that T1 elapses during the bus operation time and shifts to charge mode control is prevented.

  In the above embodiment, the lighting device installed at the bus stop is shown as an example. However, the installation location and the installation form are not limited to this, and various other application forms can be adopted. For example, on the platform of a railway station, the lighting device of the present invention may be attached to a platform edge or a waiting area. Thereby, the alternating current power supply which supplies electric power to the installation location can be omitted, and electrical facilities such as wiring can be simplified. Even in emergency facilities such as fire hydrants, buildings and structures such as farm equipment huts and bicycle storage areas, night illumination can be performed without providing an AC power supply. In this case, separate the light emitting part with the LED and the solar cell, install the light emitting part indoors or under the eaves, install the solar battery in a place where it is easy to get sunlight, such as the roof, and connect both with wiring It may be.

1 lighting device 2 solar cell 3 storage battery 4 LED
5 Housing 6 Human sensor 7 Charging control circuit (charging control means)
8 Light control circuit (Light control means)
9 CPU (Charge control means, dimming means, control unit)
12 Control board (Control unit)
27 ROM (light control means)
28 Timer (Dimming means)
30 ON-OFF timer (blinking control timer)
S3 Standby mode (first light emission state)
S5 Illumination mode (second light emission state)
S13 Power saving standby mode (first power saving light emission state)
S15 Power saving lighting mode (second power saving lighting state)
T1 first predetermined time T2 second predetermined time

Claims (3)

Solar cells,
A storage battery housed in a housing and charged by the power of the solar cell;
A light source that is provided in the housing and emits light by the power of the storage battery;
A human sensor provided in the housing for detecting the presence of a person in the vicinity;
Charging control means for controlling power feeding from the solar battery to the storage battery;
A dimming unit capable of controlling power supply from the storage battery to the light source, and capable of causing the light source to emit light at a plurality of brightness levels;
The light control means is configured to cause the light source to emit light in a first light emitting state when the human sensor does not detect a person during discharge from the storage battery, and based on detection of the presence of a person in the human sensor, Causing the light source to emit light in a second light emitting state that is brighter than the first light emitting state ;
When discharging from the storage battery and the voltage of the storage battery is less than a predetermined power supply voltage,
When the human sensor does not detect a person, the light control means causes the light source to emit light in a first power-saving light-emitting state that is darker than the first light-emitting state, and the presence of the person in the human sensor And the light source is caused to emit light in a second power-saving light-emitting state that is brighter than the first power-saving light-emitting state and darker than the second light-emitting state . When the light source emits light in the second light emission state, the light control means changes the light emission state of the light source from the second light emission state to the first light emission state after a predetermined time has elapsed. The lighting device according to claim 1, wherein: Solar cells,
  A storage battery housed in a housing and charged by the power of the solar cell;
  A light source that is provided in the housing and emits light by the power of the storage battery;
  A human sensor provided in the housing for detecting the presence of a person in the vicinity;
  Charge control means for controlling power feeding from the solar battery to the storage battery;
Dimming means capable of controlling power feeding from the storage battery to the light source and emitting the light source at a plurality of brightness levels
And a control unit having a blinking control timer for measuring time;
Comprising
  When the controller turns on the light source, it starts time measurement with the blinking control timer,
  When the measurement time of the blinking control timer reaches a first predetermined time, the light source is turned off and until the measurement time of the blinking control timer reaches a second predetermined time longer than the first predetermined time. Continue turning off the light source,
  When the measurement time of the blinking control timer reaches the second predetermined time, the measurement time of the blinking control timer is initialized and the light source can be turned on,
  When the light source can be turned on and the voltage of the solar cell is equal to or lower than a predetermined value and the human sensor does not detect a person, the control unit causes the light source to emit light in a first light emission state, and the person Based on detection of the presence of a person in the sensation sensor, the light source is caused to emit light in a second light emission state that is brighter than the first light emission state.
A lighting device characterized by that.

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