JP2014017188A - Crime prevention light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve visibility in a rainy weather or fog in addition to a crime prevention effect in an LED crime prevention light including a blue LED.
A light source having a plurality of yellow LEDs 1 that emit yellow light and a plurality of blue LEDs 2 that emit blue light, and lighting devices 3 and 4 that can individually light the yellow LED 1 and the blue LED 2 of the light source, and And a timer 5 that outputs an operation signal to the lighting devices 3 and 4 at a predetermined time set in advance, and the lighting devices 3 and 4 simultaneously light up the yellow LED 1 and the blue LED 2 of the light source before the timer 5 operates. When the timer operation signal is input, the yellow LED 1 is turned off and only the blue LED 2 is turned on.
[Selection] Figure 7

Description

  The present invention relates to a security light using a combination of a yellow LED and a blue LED as a light source.

  There is a technique in which a human sensor that detects a person and outputs a detection result is provided, and when this human sensor reacts, a blue LED is turned on to obtain a crime prevention effect. (For example, refer to Patent Document 1.)

JP 2008-305768 A

  However, blue light with a short wavelength is extremely less visible in rainy weather or fog than white light generally used for street lamps. If a white fluorescent lamp often used for street lamps is replaced with a blue fluorescent lamp with the same wattage, the total luminous flux is reduced to 1/2 to 1/5. For this reason, there is a high possibility that the effect of the security camera is impaired, there is a risk of promoting the occurrence of a traffic accident, and there is a problem that it is necessary to be careful for easy installation.

  An object of the present invention is to improve visibility even in rainy weather or fog in a security light including a blue LED as a light source.

The security light of the present invention includes a light source having a plurality of yellow LEDs that emit yellow light and a plurality of blue LEDs that emit blue light,
A lighting device capable of individually lighting the yellow LED and the blue LED of the light source;
A timer that outputs an operation signal to the lighting circuit at a predetermined time set in advance;
With
The lighting device is characterized in that the yellow LED and the blue LED of the light source are turned on simultaneously before the timer is operated, and the yellow LED is turned off and only the blue LED is turned on when a timer operation signal is input.

  ADVANTAGE OF THE INVENTION According to this invention, in LED crime prevention light containing blue LED, in addition to a crime prevention effect, visibility can be improved also in rainy weather or fog.

It is a bottom view which shows the crime prevention light of Embodiment 1. FIG. 3 is a wiring diagram of the security light according to the first embodiment. FIG. 3 is a top view showing a security light according to the first embodiment. It is an electrode pattern figure of the rainfall sensor of Embodiment 1. It is a sectional side view of FIG. FIG. 3 is a block diagram illustrating a configuration of a security light according to the first embodiment. 3 is a time chart illustrating an operation state of the security light according to the first embodiment. It is a figure which shows the relationship between the rainfall after the timer operation | movement of Embodiment 1, and a light control rate. It is a figure which shows the relationship between the rainfall and the light control rate before the timer operation | movement of Embodiment 1. FIG.

Embodiment 1 FIG.
FIG. 1 is a bottom view of a security light showing the present embodiment.

  The security light has an oval upper surface shape, a main body 100 having an attachment portion 11 for a column or the like at one end, a plurality of yellow LEDs 1 provided on the lower surface of the main body, and a plurality of yellow LEDs 1 that emit blue light. An LED module 7 as a light source having a blue LED 2, a control unit 8 including the lighting devices 3 and 4 of the LED module 7 provided in the main body, a timer 5, a rain sensor 6 provided on the upper surface of the main body, Similarly, an illuminance sensor 17 is provided.

  The heat radiating plate 9 is provided integrally with the LED module 7 so that the heat of the yellow LED and the blue LED 2 can be radiated to the outside, and is formed of, for example, aluminum having good thermal conductivity.

  The yellow LED 1 and the blue LED 2 include lighting devices 3 and 4 each having a circuit for lighting at different dimming rates.

  The illuminance sensor 17 detects the brightness of the surroundings where the main body is installed, and transmits an electrical signal to the lighting device 3 and the lighting device 4 to turn on and off the light source.

  The rain sensor 6 is provided with opposed raindrop detection electrodes exposed in the air, and determines the amount of rainfall by utilizing a short circuit between the electrodes when raindrops adhere between the electrodes. To electrically transmit signals.

  The timer 5 transmits an electrical operation signal to the lighting devices 3 and 4 at a time when traffic is reduced at night, for example, after the last train or at 22:00, which is a time zone for late night work defined by the Labor Standards Law. .

  FIG. 2 is a wiring diagram of the LED module 7 of the present embodiment.

  For example, eight yellow LEDs 1 are connected in series with the negative terminal side 16 with the anode direction facing the positive terminal 15.

  For example, eight blue LEDs 2 are connected in series with the minus terminal 16 with the anode direction facing the plus terminal 15.

  A plurality of LEDs of different colors are arranged adjacent to each other so that the light from the security light is not biased.

  As shown in FIGS. 3 to 5, the rain sensor 6 is disposed inside the upper surface of the main body so as to be inclined, and in order to prevent dust such as dust and dead leaves from adhering to the surface of the rain sensor 6. Is provided. The net 18 is installed with an inclination so that the object does not adhere to the net 18 itself.

  FIG. 4 is an electrode pattern diagram of the rain sensor.

  The rain sensor 6 is composed of a combination of, for example, a comb-like positive pole 19 and a negative pole 20, and each has a certain resistance value. When a water droplet is formed on the surface due to rain, the positive electrode 19 and the negative electrode 20 are short-circuited, and a very small amount of current flows.

  When the amount of short circuit between the electrodes is large, the resistance value decreases and a large amount of current flows. Therefore, when a large amount of current flows, it can be determined that there is a lot of rain.

  An electrical signal from the rain sensor 6 is sent to the security lamp lighting devices 3 and 4 via the wiring 13. The wiring 13 is connected to the back surface so as not to cover the sensor part of the rain sensor, is connected to the lighting devices 3 and 4 via the passage 12, and includes a cap 14 so that water droplets do not enter the entrance of the passage 12.

  Since the rain sensor 6 responds to the water droplets and transmits a signal to the lighting circuits 3 and 4, the rain sensor 6 malfunctions if the water droplets remain even in fine weather. Therefore, the electrode surface is provided with an inclination so as not to collect water droplets, and a drainage hole 10 for discharging the water droplets to the outside of the main body is provided facing the lowermost end portion.

  FIG. 6 is a block diagram illustrating a configuration of the security light according to the first embodiment.

  The yellow 1 is controlled by the lighting device 3, and the blue 2 is controlled by the lighting device 4 to be turned on, dimmed, and turned off.

  The signal detected by the rain sensor 6, the operation signal from the timer 5, and the signal from the illuminance sensor 17 are transmitted to the respective lighting devices 3 and 4.

  FIG. 7 is a time chart showing the operation of the security light according to the first embodiment. The operation will be described below with reference to FIG.

  When the time is 18:00 and the illuminance sensor 17 outputs a predetermined signal corresponding to the ambient brightness to the lighting devices 3 and 4, the lighting device turns on the light source. Since the illuminance is required in the busy time zone immediately after the lighting, the yellow LED 1 and the blue LED 2 are turned on at the same time to emit white, which is a mixed color of yellow and blue.

  Thereafter, when the time reaches 22:00, the timer 5 outputs an operation signal and is input to the lighting devices 3 and 4. That is, after this time, the lighting device 3 turns off the yellow LED 1 and the lighting device 4 continues to be turned on only by the blue LED 2 in a time zone in which traffic at night is low. It is known that the blue color has a sedative effect that acts on the parasympathetic nerves of the person to calm the feeling and an effect that calms the person psychologically. A crime prevention effect can be expected by setting the emission color to blue. Thereafter, when time passes and the surroundings become bright, the illuminance sensor 17 operates and the lighting device 4 turns off the blue LED 2.

  On the other hand, if there is rainfall during nighttime when there is a lot of traffic, that is, when the yellow LED 1 and the blue LED 2 are lit simultaneously, the rain sensor 6 outputs a detection signal corresponding to the amount of rainfall to the lighting devices 3 and 4. Then, the lighting devices 2 and 3 turn on the yellow LED 1 as it is, and adjust the blue LED 2 to light up to ensure visibility during rainfall.

  During the rain, the blue light emitted by the blue LED 2 is irregularly reflected against the rain, so that the field of view deteriorates and the rainfall gradually increases and becomes worse, for example, when the rainfall becomes so wet that an umbrella is worn. Therefore, as shown in FIG. 8, the dimming rate of the blue LED 2 is set to 100% before the rain is detected, and the rainfall for one hour, which is generally referred to as the wet rain even with an umbrella, is 20 mm. Sometimes it is set to 0%. That is, the blue LED 2 is continuously dimmed so that the brightness is gradually decreased as the rainfall is detected and the amount of rainfall increases.

  In addition, when rain is detected in a time zone in which there is little traffic at night, that is, a time zone in which the timer 5 operates to turn off the yellow LED 1 and only the blue LED 2 is lit, the lighting device 3 detects the rain sensor. In response to the output from 6, the yellow LED 1 that has already been turned off is lit again and dimmed, and at the same time, the blue LED 2 that is being lit is dimmed and lit. That is, as shown in FIG. 8, the dimming rate with respect to the rainfall amount of the yellow LED 1 and the blue LED 2 is such that the yellow LED 1 gradually increases in brightness until the rainfall amount reaches 20 mm after the rain is detected. On the other hand, the blue LED 2 is continuously dimmed so that the brightness gradually decreases. Thereby, the visibility at the time of raining at night can be secured, and at the same time, the brightness as a security light can be secured by turning on the yellow LED 1.

  DESCRIPTION OF SYMBOLS 1 Yellow LED, 2 Blue LED, 3 Yellow LED lighting device, 4 Blue LED lighting device, 5 Timer, 6 Rain sensor, 7 LED module, 8 Control part, 9 Heat sink, 10 Drain hole, 11 Mounting part, 12 Passage, 13 wiring, 14 cap, 15 plus terminal, 16 minus terminal, 17 illuminance sensor, 18 mesh, 19 pattern plus pole, 20 pattern minus pole, 100 body.

Claims (6)

A light source having a plurality of yellow LEDs that emit yellow light and a plurality of blue LEDs that emit blue light;
A lighting device capable of individually lighting the yellow LED and the blue LED of the light source;
A timer that outputs an operation signal to the lighting circuit at a predetermined time set in advance;
With
The lighting device is characterized in that the yellow LED and the blue LED of the light source are simultaneously turned on before the timer is operated, and the yellow LED is turned off and only the blue LED is turned on when a timer operation signal is input. A light source having a plurality of yellow LEDs that emit yellow light and a plurality of blue LEDs that emit blue light;
A lighting device capable of individually lighting the yellow LED and the blue LED of the light source;
A timer that outputs an operation signal to the lighting circuit at a predetermined time set in advance;
A rain sensor that detects the amount of rainfall and outputs a detection signal when it rains,
With
The lighting device simultaneously turns on the yellow LED and the blue LED of the light source before the operation of the timer, turns off the yellow LED and turns on only the blue LED when the timer operation signal is input, and turns on the yellow LED and the blue LED. A security light characterized in that when a detection signal from a rainfall sensor is input, the light emitted from the blue LED is dimmed according to the amount of rainfall. A light source having a plurality of yellow LEDs that emit yellow light and a plurality of blue LEDs that emit blue light;
A lighting device capable of individually lighting the yellow LED and the blue LED of the light source;
A timer that outputs an operation signal to the lighting circuit at a predetermined time set in advance;
A rain sensor that detects the amount of rainfall and outputs a detection signal when it rains,
With
The lighting device simultaneously turns on the yellow LED and the blue LED of the light source before the operation of the timer, turns off the yellow LED when the timer operation signal is input, turns on only the blue LED, and from the rain sensor when the blue LED is turned on. When the detection signal is input, the yellow LED is turned on again, and the light emitted from the blue LED and the yellow LED is dimmed according to the amount of rainfall.   The crime prevention light according to any one of claims 1 to 3, wherein the timer is set in advance so as to output an operation signal at a time when traffic is reduced at night.   The security light according to any one of claims 1 to 4, wherein the light source has the yellow LED and the blue LED alternately arranged adjacent to each other.   The crime prevention light according to any one of claims 1 to 5, further comprising an illuminance sensor, wherein the lighting device lights the light source based on a detection signal from the illuminance sensor.

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