JP2003187986A - Illumination apparatus having illuminance sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a bad effect in the illumination apparatus having an illuminance sensor that comprises a pilot lamp in the vicinity of an illuminance sensor. <P>SOLUTION: This is an illumination apparatus having an illuminance sensor 1 that detects the surrounding illumination intensity by means of a phototransistor and a cds element and controls lighting and turning off of the light of a light source 3 such as an incandescent lamp by a control section (microcomputer) 2 in comparison with the reference illumination intensity value. It comprises a pilot lamp 4 by, for example, a light-emitting diode in the vicinity of the illuminance sensor 1. And when this pilot lamp 4 is on, the added portion of the surrounding illumination intensity after the lighting of the pilot lamp 4 is deducted from the surrounding illumination intensity detected by the illuminance sensor 1, and comparison is made with the above reference illumination intensity. And it also has a human body sensor, and lights the light source 3 based on the condition of detecting the human body. The pilot lamp 4 is normally turned on when other apparatuses such as a ventilation fan connected to the illumination apparatus is operated, but it may be turned on as a monitor lamp at night without any connection with other apparatuses. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a lighting fixture with an illuminance sensor.

[0002]

2. Description of the Related Art In a luminaire with an illuminance sensor, the illuminance sensor detects ambient illuminance, and a control unit controls turning on / off of a light source by comparing with a reference illuminance value. That is,
For example, in the evening, when the ambient illuminance becomes lower than the reference illuminance value, the light source is turned on. When a human body sensor is also provided, the ambient illuminance is lower than the reference illuminance value and the light source is turned on when the human body is detected. For example, a toilet lamp has such an illuminator equipped with an illuminance sensor and a human body sensor, and recently, in this kind of luminaire, a control circuit function for operating a ventilation fan is also provided. The pilot lamp provided in the toilet light is lit when continuously operating regardless of detection or ambient brightness.

[0003]

However, it is often difficult to secure a space for installing the pilot lamp in a toilet lamp, and for example, the pilot lamp is often unavoidable in the vicinity of the illuminance sensor. Then,
When the pilot lamp is turned on, the light also enters the illuminance sensor, which causes a problem that the toilet lamp does not turn on although the surroundings are considerably dark. Further, even if the light is turned on, the light is incident on the illuminance sensor, so that it is determined that the surroundings have become bright, and the light is turned off again. Therefore, in view of such problems to be solved, the present invention has an object to prevent an adverse effect in an illumination fixture with an illuminance sensor including a pilot lamp near the illuminance sensor.

[0004]

SUMMARY OF THE INVENTION The present invention is a lighting fixture with an illuminance sensor, which detects ambient illuminance by an illuminance sensor and controls turning on / off of a light source by comparing with a reference illuminance value by a control unit. A pilot lamp is provided in the vicinity of the sensor, and when this pilot lamp is lit, the increase in ambient illuminance after lighting of the pilot lamp is subtracted from the ambient illuminance detected by the illuminance sensor, and the value is compared with the reference illuminance value. Is a lighting fixture with an illuminance sensor. Further, when the human body sensor is provided, the light source is further turned on on condition that the human body is detected. In addition, as the pilot lamp, there is a pilot lamp that lights up when another device connected to the lighting device operates.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described, but it is merely an exemplary embodiment adopted based on the present invention, and the present invention is based on matters peculiar to the embodiment. However, the technical scope of the present invention should be determined based on the matters shown in the claims and the matters substantially equivalent to the matters.

In the illustrated embodiment, an illuminance sensor 1 such as a phototransistor or a cds element detects ambient illuminance, and a control unit (microcomputer) 2 compares it with a reference illuminance value to turn on / off a light source 3 such as an incandescent lamp. It is a luminaire with an illuminance sensor for controlling. Further, a pilot lamp 4 including, for example, a light emitting diode is provided near the illuminance sensor 1. When the pilot lamp 4 is turned on, the increase in ambient illuminance after the pilot lamp 4 is turned on is subtracted from the ambient illuminance detected by the illuminance sensor 1 and is compared with the reference illuminance value. Further, the human body sensor 5 is also provided, and the light source 3 is turned on under the condition that the human body is detected. The pilot lamp 4 is lit when other equipment such as a ventilation fan connected to the lighting equipment is in operation, but may be lit as a monitor light at night regardless of other equipment. Good.

More specifically, the present lighting device is used as a toilet light, a light source 3 is provided in the center of the lower surface of a base 7 mounted on a ceiling 6 via a socket 8, and a semicircular outer periphery of the lower surface of the base 7. A transparent shade 9 is provided so as to cover the light source 3. In addition, an elongated opaque case 10 is provided on one side of the base 7, and the circuit boards 11 and 12 are housed in the case 10. Circuit board 11
The illuminance sensor 1, the human body sensor 5, the pilot lamp 4, the variable resistors 14, 15 and the like are mounted on the circuit board 11.
It is covered with a dome-shaped cover 16 made of polyethylene attached to, and the lower portions of the variable resistors 14 and 15 and the cover 16 are exposed on the lower surface of the case 10.

The circuit board 12 is provided with a control unit 2 connected from the illuminance sensor 1, the human body sensor 5, the pilot lamp 4 and the like, a driver circuit element in the subsequent stage, and other devices such as a light source 3 and a ventilation fan. To control. The transistor 17 of FIG. 3 current-amplifies the output control signal of the control unit 2, and controls the light source 3 to be turned on / off via a power control element such as a triac (not shown).

The output of the illuminance sensor 1 installed facing downward is input to the AD2 port of the control unit 2, and the input value is now AD2.
If it is a, this value is stored in the control unit 2. Next, the user performs a quick on / off / on operation within 1 second, for example, on the wall switch outside the toilet in the power supply path connected to the lighting equipment, and sets the ventilation fan to the presence / absence of the human body and the ambient brightness. It is assumed that continuous operation is performed regardless of the above. It is assumed that the lighting equipment is programmed so that the ventilation fan is continuously operated by determining the power-off time due to such a quick operation. Then, the ventilation fan is continuously operated and the pilot lamp 4 of the lighting device is turned on. Then, assuming that the input value of the AD2 port immediately after lighting is AD2b, this value is stored in the control unit 2. The control unit 2
Is sampling and storing the input value of the AD2 port at a predetermined time interval, and at least the current input value and the immediately preceding input value may be stored. Next, in order to subtract the AD2 value immediately before lighting from the AD2 value immediately after lighting the pilot lamp 4, a difference calculation of AD2b-AD2a is performed.

Next, the AD2 port input value from the illuminance sensor 1 is compared with the AD1 port input value which is the reference illuminance value set at the rotational position of the variable resistor 14. The pilot lamp 4 is turned on. Previously, the value input to the AD2 port was sampled at a predetermined time interval and compared with the AD1 port input value, but after the pilot lamp 4 lights,
If the value entering the AD2 port is AD2, change this to AD2- (AD2
b-AD2a) is converted into a sampling value change process of subtracting an increase in ambient illuminance after the pilot lamp 4 is turned on. Then, the control unit 2 compares the changed sampling value with the reference illuminance value of the AD1 port, makes a clear decision that AD2 sampling value> AD1 reference illuminance value, controls the light source 3 to turn off, and outputs AD2 sampling value < = AD1 is the reference illuminance value, dark determination is made, and further, when the human body sensor 5 detects a human body, the light source 3 is turned on. In addition, when the human body sensor 5 is not provided, the lighting control of the light source 3 is performed immediately after the dark determination.

In this way, the influence of the light after the pilot lamp 4 is turned on can be canceled and the true ambient illuminance can be calculated at all times. Therefore, the light source 3 does not turn on even if the surroundings become dark, or even if it turns on again, The harmful effect of turning off the light can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2A is a bottom view of the sensor circuit board (cover 16
(The inside is shown in a see-through state.) (B) The same side view (the inside of the cover 16 is shown in the see-through state)

FIG. 3 is a circuit block diagram of the main part of the same.

FIG. 4 is a flowchart showing the same operation.

[Explanation of symbols]

1 Illuminance sensor 2 Control unit (microcomputer) 3 light sources 4 pilot lamp 5 human body sensor

Claims (3)

[Claims] 1. A luminaire with an illuminance sensor, wherein an illuminance sensor detects ambient illuminance and a control unit controls turning on / off of a light source by comparing with a reference illuminance value, and a pilot lamp is provided in the vicinity of the illuminance sensor. An illumination fixture with an illuminance sensor that, when the pilot lamp is turned on, subtracts an increase in the ambient illuminance after the pilot lamp is turned on from the ambient illuminance detected by the illuminance sensor and compares it with the reference illuminance value. 2. The human body sensor according to claim 1, further comprising:
Furthermore, a lighting fixture with an illuminance sensor that lights a light source on condition that a human body is detected. 3. The luminaire with an illuminance sensor according to claim 1, wherein the pilot lamp is turned on when another luminaire connected to the luminaire is in operation.