JP2017157523A - Lighting device and lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device and a lighting system which can simplify a circuit configuration of a power supply circuit for a wireless reception unit and reduce the size of the lighting device.SOLUTION: A lighting device 2 includes: a light emitting module 11 including one or more light emitting elements; a constant voltage circuit 14 connected to the light emitting module 11 and generating a constant voltage with a voltage generated in the light emitting module 11 as an input voltage; a wireless reception unit 13 that operates using the constant voltage generated by the constant voltage circuit 14 as a power source and receives a wireless dimming signal; and a control device 12 that controls driving of the light emitting module 11 on the basis of the received dimming signal.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to a lighting device and a lighting system.

  Conventionally, there are illumination devices that can be operated by a wall switch or the like, and illumination devices that can be remotely operated by an infrared remote controller or the like. In recent years, illumination devices that can be remotely operated by wireless communication have been put into practical use. A lighting device capable of wireless communication requires a power supply circuit for supplying power to the wireless receiver.

  However, the power supply circuit is a circuit that is connected to a commercial power supply and generates a predetermined voltage. The power supply circuit is relatively large in size and is built in the lighting device as a circuit separate from the wireless receiver, the light emitting module, and the controller. Therefore, it becomes an obstacle to miniaturization of the lighting device.

JP 2014-16338 A

  Therefore, an object of the present embodiment is to provide a lighting device and a lighting system capable of simplifying the circuit configuration of the power supply circuit for the wireless receiver and reducing the size of the lighting device.

  The lighting device according to the embodiment includes a light emitting module including one or more light emitting elements, a constant voltage circuit connected to the light emitting module and generating a constant voltage using a voltage generated in the light emitting module as an input voltage, and the constant voltage. A wireless receiving unit that operates using the constant voltage generated by the circuit as a power source and receives a wireless signal; and a control device that controls driving of the light emitting module based on the received wireless signal.

  According to the present embodiment, it is possible to realize an illumination device and an illumination system that can simplify the circuit configuration of the power supply circuit for the wireless reception unit and reduce the size of the illumination device.

It is a block diagram which shows the structure of the illumination system concerning embodiment. It is a circuit diagram which shows the structure of the control apparatus 12 concerning embodiment. It is a graph which shows the relationship between the electric current which flows into LED, and a voltage concerning embodiment. It is a circuit diagram which shows the structure of the illuminating device 2 connected to the dimmer by the wire connection concerning embodiment.

The lighting device according to the embodiment includes a light emitting module including one or more light emitting elements, a constant voltage circuit connected to the light emitting module and generating a constant voltage using a voltage generated in the light emitting module as an input voltage, and the constant voltage. A wireless receiving unit that operates using the constant voltage generated by the circuit as a power source and receives a wireless signal; and a control device that controls driving of the light emitting module based on the received wireless signal.
Hereinafter, embodiments will be described with reference to the drawings.
(Constitution)
FIG. 1 is a configuration diagram showing a configuration of a lighting system according to the present embodiment.
The lighting system 1 includes a lighting device 2 and a center device 3 that transmits a control signal to the lighting device 2.
The illumination device 2 includes a light emitting module 11, a control device 12, a wireless reception unit 13, and a constant voltage circuit 14.

  The light emitting module 11 includes one or more light emitting elements, and emits light when a predetermined voltage is applied. Here, a light emitting diode (hereinafter referred to as LED) is used as the light emitting element. The light emitting module 11 is configured by connecting a plurality of LEDs in series. Each LED emits light when a voltage equal to or higher than the forward voltage Vf is applied.

Here, LEDs are used as light emitting elements, but light emitting elements other than LEDs, such as organic electroluminescence (OLED) elements, may be used. In addition, any light source that emits light when a predetermined voltage or higher is applied can be used as the light emitting module 11 in the same manner as an LED.
The control device 12 includes a circuit that supplies a predetermined voltage to the light emitting module 11 to the light emitting module 11 based on the dimming signal RS from the wireless receiver 13. The control device 12 is connected to a commercial power source 15 to obtain a power source. The configuration of the control device 12 will be described later.

The wireless reception unit 13 is a circuit unit that receives a wireless signal WS including a dimming signal.
Here, the wireless reception unit 13 is a wireless unit capable of receiving a wireless LAN signal such as WIFI. The wireless reception unit 13 outputs the dimming signal RS to the wiring 13a. A connector 16a is provided at the tip of the wiring 13a. A connector 16b is provided at the tip of the wiring 12a extending from the control device 12. The connectors 16a and 16b are detachable connecting portions 16. That is, the control device 12 and the wireless reception unit 13 are connected by the connection unit 16. The dimming signal RS from the wireless reception unit 13 is supplied to the control device 12 via the connection unit 16.

  The constant voltage circuit 14 is connected to the light emitting module 11, inputs a voltage generated in the light emitting module 11 as an input power source, generates a predetermined constant voltage Vc, and supplies the wireless receiver 13 with the constant voltage Vc. is there. For example, the constant voltage circuit 14 is a three-terminal regulator.

  As described above, the constant voltage circuit 14 is connected to the light emitting module 11, generates the constant voltage Vc using the voltage generated in the light emitting module 11 as an input voltage, and the wireless receiver 13 generates the constant voltage circuit 14. Operates using the constant voltage Vc as a power source and receives a wireless dimming signal.

  Here, the constant voltage circuit 14 is connected to both ends of the light emitting module 11, and generates a constant voltage Vc using the voltage generated at both ends of the light emitting module 11 as an input power source. Although the resistance of the light emitting module 11 changes due to temperature change, the constant voltage circuit 14 outputs a constant voltage Vc without being affected by such temperature change.

  In FIG. 1, the light emitting module 11 and the constant voltage circuit 14 are connected so that the voltage across the plurality of LEDs connected in series is supplied to the constant voltage circuit 14 as an input power source. If the circuit 14 operates and can output a predetermined constant voltage Vc, a part of the plurality of LEDs may be supplied to the constant voltage circuit 14.

The wireless reception unit 13 can receive a wireless signal WS including a dimming signal from the base station 17 installed in the vicinity of the lighting device 2. The base station 17 is communicably connected to a center device 19 that controls the lighting device 2 via the Internet or a predetermined network 18.
The wireless signal WS may be transmitted from a terminal 17 ′ having a wireless communication function. In this case, the terminal 17 ′ may be connected to the center device 3 via the network 18 or may be configured not to be connected.

The control device 12 controls the driving of the light emitting module 11 based on the received dimming signal.
As described above, the center device 19 or the terminal 17 ′ can remotely control the lighting device 2 by transmitting the dimming signal RS to the lighting device 2 by the wireless signal WS.

FIG. 2 is a circuit diagram showing a configuration of the control device 12.
The control device 12 includes a rectifier 21, a step-down circuit 22, a control unit 23, a dimming circuit 24, and a resistance circuit 25.

The rectifier 21 is connected to the commercial power supply 15 and supplies the rectified voltage signal to the step-down circuit 22.
The step-down circuit 22 includes a switching element 31, a rectifying element 32, an inductor 33, and a capacitor 34. The switching element 31 is, for example, an FET. The rectifying element 32 is a diode, for example. The terminals a and b connected to both ends of the capacitor 34 are connected to the light emitting module 11 as an illumination load and to the resistor circuit 25 in parallel. The resistance circuit 25 includes voltage-dividing resistors 35 and 36 directly connected for voltage detection. A connection point P between the voltage dividing resistors 35 and 36 is connected to the control unit 23, and the control unit 23 can monitor the state of the lighting load.

The dimming circuit 24 outputs a signal that can be processed by the control unit 23 to the control unit 23 based on the dimming signal RS input to the terminals c and d connected to the wiring 12a.
The control unit 23 includes a circuit such as a CPU, generates a PWM (pulse width modulation) signal corresponding to the dimming signal RS from the dimming circuit 24 while monitoring the voltage at the connection point P, and switches the switching element. By supplying to 31, the light emission amount of the light emitting module 11 is controlled.

When the light emitting module 11 is caused to emit light, the control unit 23 outputs a duty on / off signal corresponding to the dimming signal RS to the gate of the switching element 31 as a PWM signal. When the light emitting module 11 is caused to emit light, the control unit 23 drives the switching element 31 such that a voltage Va equal to or higher than the forward voltage Vf is applied to each LED. When the light emitting module 11 is not caused to emit light, the control unit 23 drives the switching element 31 so that the voltage Vb equal to or lower than the forward voltage Vf is applied to each LED. That is, the control unit 23 does not cause the light emitting module 11 to emit light. A voltage signal is applied to the gate of the switching element 31 such that a voltage Vb that is equal to or less than the forward voltage Vf of the LED and applied to each LED.

Further, the voltage applied to the light emitting module 11 when the lighting device 2 is turned off and when the light emitting module 11 is not caused to emit light in the PWM control, drives the constant voltage circuit 14 so that the constant voltage circuit 14 has a constant voltage Vc. Is a voltage that can be output. That is, when the light emitting module 11 is not caused to emit light, the control device 12 applies to the light emitting module 11 a voltage that allows the constant voltage circuit to operate and generate the constant voltage Vc.
The control unit 23 and the dimming circuit 24 are supplied with power from a smoothing circuit (not shown) connected to the rectifier 21.

FIG. 3 is a graph showing the relationship between the current flowing through the LED and the voltage.
When the applied voltage exceeds a predetermined forward voltage Vf, each LED emits light when a current flows through the LED. The amount of light emitted when the light emitting module 11 emits light is adjusted according to the voltage Va equal to or higher than the forward voltage Vf.

Therefore, when the light emitting module 11 emits light, the illumination device 2 outputs a voltage between the output terminals a and b such that a voltage Va equal to or higher than the forward voltage Vf, which is a light emission start voltage, is applied to each LED. . When the light emitting module 11 does not emit light, the lighting device 2 outputs a voltage at which the voltage Vb equal to or lower than the forward voltage Vf is applied to each LED between the output terminals a and b. Even when the light emitting module 11 does not emit light, a voltage capable of outputting the constant voltage Vc is applied to the constant voltage circuit 14.
(Function)
In the illumination device 2, the wireless reception unit 13 receives the wireless signal WS including the dimming signal, and the control device 12 drives the light emitting module 11 by PWM control based on the received dimming signal RS to emit light. The light emission amount of the module 11 is adjusted.

The constant voltage circuit 14 generates a constant voltage Vc using the voltage obtained from the light emitting module 11 as an input power supply, and supplies the constant voltage Vc to the wireless reception unit 13.
Therefore, since the power supply circuit connected to the commercial power supply like the conventional one is unnecessary, the lighting device 2 can be reduced in size.

  Moreover, since the control apparatus 12 and the radio | wireless receiving part 13 are connected by the connection part 16 which consists of a detachable connector, it can also be used so that the illuminating device 2 may be controlled with a wire communication.

FIG. 4 is a circuit diagram showing a configuration of the lighting device 2 connected to the dimmer by a wire.
The dimmer 41 is provided on a building wall or the like and can be operated by a user. A connector 16 c is provided at the tip of the wiring 41 a extending from the dimmer 41, and the connector 16 c can be connected to the connector 16 a of the lighting device 2.

  Therefore, when the user wants to use the lighting device 2 in a wired manner, the lighting device 2 receives the dimming signal RS from the dimmer 41 by removing the connector 16b from the connector 16a and connecting the connector 16c to the connector 16b. In response, the brightness of the light emitting module 11 can be controlled.

The lighting device 2 is installed in a place where a radio wave can be reliably received in a building or the like.
However, after the lighting device 2 is once installed, it may be difficult to reach the place where the radio wave has reached until then due to rearrangement of the room or the like.

In such a case, conventionally, the wireless type lighting device has to be replaced with a wired type lighting device, and there is a problem in that the replacement takes cost and time.
In addition, when wireless communication is used, there is a possibility that the control of the lighting device may be hacked, so that there is a demand for operating by wire rather than wireless depending on the facility or room.

  Therefore, when a wired dimming signal is to be supplied to the illuminating device 2, the connection unit 16 can be used to connect to the dimmer, so that the cost can be reduced and the wireless to wired illuminating device can be easily used. Can be changed.

  As described above, according to the above-described embodiment, it is possible to provide a lighting device and a lighting system that can simplify the circuit configuration of the power supply circuit for the wireless receiver and reduce the size of the lighting device. .

  Although several embodiments of the present invention have been described, these embodiments are illustrated by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Lighting system, 2 Lighting apparatus, 3 Center apparatus, 11 Light emitting module, 12 Control apparatus, 12a wiring, 13 Wireless receiving part, 13a wiring, 14 Constant voltage circuit, 15 Commercial power supply, 16 Connection part, 16a, 16b, 16c Connector , 17 base station, 18 network, 19 center device, 21 rectifier, 22 step-down circuit, 23 control unit, 24 dimming circuit, 25 resistance circuit, 31 switching element, 32 rectifier element, 33 inductor, 34 capacitor, 35, 36 minutes Piezoresistor, 41 dimmer, 41a wiring.

Claims (5)

A light emitting module including one or more light emitting elements;
A constant voltage circuit that is connected to the light emitting module and generates a constant voltage using a voltage generated in the light emitting module as an input voltage;
A radio receiving unit that operates using the constant voltage generated by the constant voltage circuit as a power source and receives a radio signal;
A control device for controlling the driving of the light emitting module based on the received wireless signal;
A lighting device.   2. The lighting device according to claim 1, wherein when the light emitting module is not caused to emit light, the control device applies a voltage capable of generating the constant voltage by operating the constant voltage circuit to the light emitting module.   The lighting device according to claim 1, wherein the control device and the wireless reception unit are connected by a detachable connector.   The lighting device according to claim 1, wherein the light emitting element is an element that emits light when a predetermined forward voltage is applied. The lighting device according to any one of claims 1 to 4,
A center device for transmitting the dimming signal to the lighting device;
Lighting system.

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