JP6210412B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device, and more particularly to a lighting device including main lighting and auxiliary lighting.

  In general, an indoor lighting device is supplied with electric power from an external power source such as a commercial AC power source, and is usually switched on and off by turning on and off the switch. However, if a power failure occurs while the lighting device is lit, the lighting device is suddenly turned off against the user's will, and the user needs to take measures such as searching for a flashlight in a dark environment with the light turned off. is there. Further, even after a power failure, immediately after the light is turned off, the user who has turned off needs to perform an operation such as moving in a dark environment. Therefore, an illumination device that automatically turns on auxiliary illumination at the time of power failure and immediately after extinguishing is being studied (for example, Patent Document 1).

JP 2013-97899 A

  In the illuminating device described in Patent Document 1, the auxiliary lighting is lit in the event of a power failure using the power charged in the capacitor during lighting. However, in the lighting device described in Patent Document 1, when the switch is frequently turned on and off, and when power outages frequently occur, the capacitor is charged for a short period. There is a problem that it is not.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an illumination device that can charge a storage element for auxiliary illumination at high speed.

  In order to achieve the above object, one embodiment of a lighting device according to the present invention is a lighting device to which power is supplied from an external power source, the main light source that is lit by power supplied from the external power source, and a storage element And an auxiliary illumination unit including an auxiliary light source that is lit by being supplied with electric power from the power storage element when supply of electric power from the external power source to the main light source is stopped, and the main light source is supplied with electric power. A first charging circuit and a second charging circuit that are supplied with electric power from the external power source and charge the storage element.

  Further, in one embodiment of the lighting device according to the present invention, the second charging circuit may be configured to charge the power storage element faster than the first charging circuit.

  Further, in one aspect of the lighting device according to the present invention, a time constant of a circuit configured by the second charging circuit and the power storage element is a circuit configured by the first charging circuit and the power storage element. It is good also as a structure smaller than these time constants.

  Moreover, the aspect of the lighting device according to the present invention may be configured such that a voltage higher than that of the first charging circuit is applied to the second charging circuit.

  Further, in one embodiment of the lighting device according to the present invention, a time constant of a circuit including the first charging circuit and the power storage element may be 1 minute or more.

  Further, in one aspect of the lighting device according to the present invention, the second charging circuit includes a switch for switching on / off of charging, and the switch is turned on after starting power supply from the external power source to the main light source. It may be configured to be turned off after a predetermined time has elapsed.

  ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which can charge the electrical storage element for auxiliary illumination at high speed can be provided.

FIG. 1 is a schematic view of a lighting apparatus according to an embodiment. FIG. 2 is a circuit diagram of the illumination device according to the embodiment. FIG. 3 is a flowchart showing an operation at the start of power supply of the lighting apparatus according to the embodiment. FIG. 4 is a graph showing a change with time of a current value flowing through the charging circuit of the lighting apparatus according to the embodiment. FIG. 5 is a flowchart showing an operation when the power supply of the lighting apparatus according to the embodiment is stopped.

  Hereinafter, an illumination device according to an embodiment of the present invention will be described with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, numerical values, shapes, components, arrangement positions and connection forms of components, steps (steps), process orders, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. . Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment)
First, the structure of the lighting device according to the embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overview diagram illustrating an example of a usage mode of the lighting apparatus according to the present embodiment. FIG. 1 shows a ceiling light as an example of a lighting device according to the present embodiment. As shown in FIG. 1, the lighting device 1 is turned on and off when the user turns on and off the switch 100. FIG. 2 is a circuit diagram of lighting apparatus 1 according to the present embodiment. As shown in FIG. 2, the lighting device 1 is a device that is supplied with electric power from an external power source 200 that is a commercial AC power source via a switch 100, and includes a main lighting unit 2, an auxiliary lighting unit 3, and a control unit 4. The first charging circuit 5a and the second charging circuit 5b are provided.

  The main illumination unit 2 shown in FIG. 2 is an illumination unit including a main light source 23 that is turned on when power is supplied from an external power source 200. In addition to the main light source 23, a rectifier circuit 21 and a boost chopper circuit 22 are provided. Prepare. The rectifier circuit 21 is a circuit that converts AC power supplied from the external power source 200 into DC power, and applies a DC voltage to the boost chopper circuit 22. The step-up chopper circuit 22 is a DC-DC converter that includes a switching element, an inductor, a diode, and the like, and boosts a direct-current voltage applied from the rectifier circuit 21 and applies it to the main light source 23. The main light source 23 is a light source that is turned on when a DC voltage output from the step-up chopper circuit 22 is applied, and includes, for example, an LED.

  The auxiliary illumination unit 3 shown in FIG. 2 is an illumination unit including an auxiliary light source 31 that is turned on when the supply of power from the external power source 200 is stopped. An element 33 and a Zener diode 34 are provided. The auxiliary light source switch 32 is a switching element that can be switched on and off by a signal output from the control unit 4, and includes, for example, a switching transistor. The storage element 33 is an element that stores electric power supplied from the external power source 200 via the first charging circuit 5a and the second charging circuit 5b, and includes, for example, an electrolytic capacitor. The storage element 33 supplies power to the auxiliary light source 31 when the supply of power from the external power source 200 is stopped. The zener diode 34 is an element for limiting the voltage applied to the power storage element 33. The auxiliary light source 31 is a light source that is lit by being supplied with electric power from the power storage element 33 when the supply of electric power from the external power source 200 is stopped, and includes, for example, an LED.

  The first charging circuit 5a shown in FIG. 2 is a circuit that supplies the output of the rectifier circuit 21 to the auxiliary illumination unit 3 to charge the storage element 33, and includes a diode 51a and a resistor 52a.

  The second charging circuit 5b shown in FIG. 2 is a circuit that supplies the output of the step-up chopper circuit 22 to the auxiliary lighting unit 3 to charge the storage element 33, and includes a diode 51b, a resistor 52b, and a charge switch 53b. . The charge switch 53b is a switching element for switching the on / off of charging by the second charging circuit 5b, and includes, for example, a switching transistor. The charging switch 53b can be turned on / off by the control unit 4.

  The resistance value of the resistance of each charging circuit is such that the time constant of the circuit constituted by the second charging circuit 5b and the electric storage element 33 is the time constant of the circuit constituted by the first charging circuit 5a and the electric storage element 33. It is set to be smaller. That is, the resistance value of the resistor 52b is set to a value smaller than the resistance value of the resistor 52a. For example, the time constant of the circuit composed of the first charging circuit 5a and the storage element 33 is 1 minute or more, and the time constant of the circuit composed of the second charging circuit 5b and the storage element 33 is less than 1 minute. Set to In the present embodiment, the RC time constant can be used as the time constant.

  The control unit 4 shown in FIG. 2 detects whether or not power is supplied to the lighting device 1 and controls turning on / off of the auxiliary light source 31 and turning on / off the charging switch 53b of the second charging circuit 5b. It is a processing part which also performs control which switches. The control unit 4 is composed of, for example, a microcomputer and is supplied with driving power from the rectifier circuit 21 (the driving power supply circuit is not shown). The control unit 4 has a function of detecting whether power is supplied from the rectifier circuit 21. The control unit 4 outputs signals to the auxiliary light source switch 32 of the auxiliary illumination unit 3 and the charging switch 53b of the second charging circuit 5b to control on / off.

  Next, the operation | movement at the time of the electric power supply start of the illuminating device 1 which concerns on this Embodiment shown by FIG.1 and FIG.2 is demonstrated using FIG.3 and FIG.4. FIG. 3 is a flowchart showing the operation of the control unit 4 at the start of power supply. FIG. 4 is a graph showing changes with time of current values flowing in the first charging circuit 5a and the second charging circuit 5b at the start of power supply.

  As shown in FIG. 3, the control unit 4 of the lighting device 1 first detects the start of power supply using the power supply detection function (S11). At this time, supply of electric power from the first charging circuit 5a to the auxiliary illumination unit 3 is started. When detecting the start of power supply (S11: Yes), the controller 4 outputs a signal to the charging switch 53b to turn on the charging switch 53b (S12). When the charging switch 53b is turned on, supply of power to the auxiliary lighting unit 3 is also started from the second charging circuit 5b.

  When the charging switch 53b is turned on, the control unit 4 is kept in a standby state until a predetermined time elapses in the control unit 4 (S13). Here, the predetermined time is set to, for example, a time required for 80% charging of the storage element 33 to be completed. Then, when the predetermined time has elapsed (S13: Yes), the control unit 4 outputs a signal to the charging switch 53b of the second charging circuit 5b to turn off the charging switch 53b (S14). Thereby, the supply of electric power from the second charging circuit 5b to the electric storage element 33 is stopped.

  The time change of the current value flowing from the first charging circuit 5a and the second charging circuit 5b to the storage element 33 will be described with reference to FIG. FIG. 4 is a graph showing temporal changes in the value of the current flowing from the first charging circuit 5a and the second charging circuit 5b to the storage element 33. As shown in FIG. 4, when the supply of power from the external power source 200 to the lighting device 1 is started, the charging switch 53b is turned on by the control unit 4, and the first charging circuit 5a and the second charging are turned on. A current starts to flow from the circuit 5 b to the storage element 33. Therefore, in lighting device 1 according to the present embodiment, power storage element 33 is charged by two charging circuits, so that charging can be performed at a higher speed than when only one charging circuit is charged. Furthermore, since the output voltage of the boost chopper circuit 22 is applied to the second charging circuit 5b, the applied voltage is higher than that of the first charging circuit 5a. Further, the resistor 52b of the second charging circuit 5b has a smaller resistance value than the resistor 52a of the first charging circuit 5a. Thereby, as shown in FIG. 4, the current value flowing from the second charging circuit 5b to the storage element 33 is larger than the current value flowing from the first charging circuit 5a. That is, the second charging circuit 5b can be charged faster than the first charging circuit 5a. In addition, since the charging switch 53b of the second charging circuit 5b is turned off after a predetermined time has elapsed since being turned on, power consumption by the second charging circuit 5b is reduced by the second charging circuit 5b. Suppressed compared to when not turned off.

  Next, the operation | movement at the time of the electric power supply stop of the illuminating device 1 which concerns on this Embodiment is demonstrated using FIG. FIG. 5 is a flowchart showing the operation of the control unit 4 when power supply is stopped.

  The control part 4 of the illuminating device 1 detects the electric power supply stop from the external power supply 200 using an electric power supply detection function (S21). When detecting the power supply stop (S21: Yes), the control unit 4 outputs a signal to the auxiliary light source switch 32 of the auxiliary illumination unit 3 to turn on the auxiliary light source switch 32. Thereby, electric power is supplied from the electrical storage element 33 to the auxiliary light source 31, and the auxiliary light source 31 is turned on (S22). Therefore, when the supply of power from the external power source 200 to the lighting device 1 is stopped, the main light source 23 is turned off and the auxiliary light source 31 is turned on. The drive power after the power supply of the control unit 4 is stopped may be supplied from a capacitive element provided in the control unit 4, or supplied from an external battery, the storage element 33 of the auxiliary illumination unit 3, or the like. May be.

  As described above, lighting device 1 according to the present embodiment is lighting device 1 that is supplied with electric power from external power supply 200, and has a main light source 23 that is turned on by being supplied with electric power from external power supply 200, and an electric storage device. When the supply of power from the element 33 and the external power supply 200 to the main light source 23 is stopped, the auxiliary illumination unit 3 including the auxiliary light source 31 that is supplied with power from the power storage element 33 and is turned on, and the main light source 23 is powered. , The first charging circuit 5a and the second charging circuit 5b, which are supplied with electric power from the external power source 200 and charge the storage element 33, are provided. Thereby, the electrical storage element 33 can be charged faster than the case where there is one charging circuit.

  Moreover, in the illuminating device 1 which concerns on this Embodiment, the 2nd charging circuit 5b is equipped with the structure which charges the electrical storage element 33 faster than the 1st charging circuit 5a. In order to speed up charging of the storage element 33 by the second charging circuit 5b, in the lighting device 1 according to the present embodiment, the time constant of the circuit configured by the second charging circuit 5b and the storage element 33 However, it has a configuration smaller than the time constant of the circuit configured by the first charging circuit 5 a and the storage element 33. Further, in order to further speed up charging of the storage element 33 by the second charging circuit 5b, in the lighting device 1 according to the present embodiment, the second charging circuit 5b includes the first charging circuit 5a. A configuration in which a high voltage is applied is provided. With these configurations, in lighting device 1 according to the present embodiment, power storage element 33 can be charged at higher speed.

  Moreover, in the illuminating device 1 which concerns on this Embodiment, the 2nd charging circuit 5b is provided with the charge switch 53b which switches the on / off of charge, and the charge switch 53b starts the electric power supply from the external power supply 200 to the main light source 23 Later, it is turned on, and after a predetermined time has passed, it is turned off. Thereby, the power consumption in the second charging circuit 5b can be suppressed.

(Variations, etc.)
As mentioned above, although the illuminating device which concerns on this invention was demonstrated based on embodiment, this invention is not limited to the said embodiment.

  For example, in the above embodiment, the resistance value of the resistor 52b of the second charging circuit 5b is configured to be smaller than the resistance value of the resistor 52a of the first charging circuit 5a, but both resistance values are set to the same value. May be.

  In the above embodiment, the voltage value applied to the second charging circuit 5b is larger than the voltage value applied to the first charging circuit 5a. However, both voltage values are set to the same value. May be. For example, the output voltage from the rectifier circuit 21 may be applied to both charging circuits.

  Moreover, in the said embodiment, although charging from the 2nd charging circuit 5b was restrict | limited to predetermined time, it is good also as a structure which does not restrict | limit.

  Moreover, in the said embodiment, although the presence or absence of the supply of electric power was detected by the electric power supply detection function of the control part 4, you may use another electric power supply detection means. For example, a circuit that detects the output voltage of the rectifier circuit 21 may be provided to detect whether power is supplied.

  In addition, the auxiliary light source 31 is turned on when the supply of power to the lighting device 1 is stopped. However, the auxiliary light source 31 is used only when the external power source 200 stops supplying power (in the case of a power failure). It is good also as a structure which lights. Any known means can be adopted as the power failure detection means. For example, a configuration in which a power failure is detected by providing a voltage detection circuit between the external power source 200 and the switch 100 to detect a voltage drop can be employed.

  Moreover, in the said embodiment, although it was set as the structure which uses a commercial alternating current power supply as the external power supply 200 which supplies electric power to the illuminating device 1, the structure which uses another system | strain power supply, an electrical storage, a generator etc. as the external power supply 200. It is good.

  In each of the above embodiments, each light source is an LED, but may be an organic EL (Electro-Luminescence) element.

  Moreover, in the said embodiment, although it was set as the structure which uses an electrolytic capacitor as the electrical storage element 33 which supplies electric power to the auxiliary light source 31, it is good also as a structure which uses another capacitor, a rechargeable battery, etc. as the electrical storage element 33.

  Moreover, in the said embodiment, although it was set as the structure which provides two charging circuits, it is good also as a structure which provides three or more charging circuits.

  In addition, the present invention can be realized by various combinations conceived by those skilled in the art for each embodiment, or by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present invention. This form is also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Main illumination part 3 Auxiliary illumination part 4 Control part 5a 1st charging circuit 5b 2nd charging circuit 21 Rectifier circuit 22 Boost chopper circuit 23 Main light source 31 Auxiliary light source 32 Auxiliary light source switch 33 Power storage element 34 Zener diode 51a , 51b Diode 52a, 52b Resistor 53b Charge switch 100 Switch 200 External power supply

Claims (5)

A lighting device to which power is supplied from an external power source,
A main light source that is supplied with power from the external power source and lights up;
An auxiliary lighting unit including an electric storage element, and an auxiliary light source that is supplied with electric power from the electric storage element when the supply of electric power from the external power source to the main light source is stopped; and
A first charging circuit and a second charging circuit that are supplied with power from the external power source and charge the power storage element when the main light source is supplied with power ; and
A lighting device in which a voltage higher than that of the first charging circuit is applied to the second charging circuit . The lighting device according to claim 1, wherein the second charging circuit charges the power storage element at a higher speed than the first charging circuit. The time constant of the circuit comprised from said 2nd charging circuit and said electrical storage element is smaller than the time constant of the circuit comprised from said 1st charging circuit and said electrical storage element. Lighting device. Lighting device according to any one of claims 1 to 3 the time constant of the circuit formed is more than 1 minute from said first charging circuit and the storage element. The second charging circuit includes a switch for switching charging intermittently,
Said switch, said is from the external power supply and turned on after the start power supply to the main light source, an illumination device according to any one of claims 1 to 4 to be turned off after a predetermined time has elapsed.

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