JPS63124301A - Automatic dimmer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic light control device that controls the amount of light introduced into a room and the amount of light from an indoor lighting lamp.

[Conventional technology]

In order to maintain appropriate brightness indoors, conventional methods have been used to close window blinds when there is sufficient outside light, and when there is little or no outside light, such as from evening to night. When this was not possible, lighting was controlled using a dimmer.

[Problem that the invention seeks to solve]

By the way, adjusting the brightness in the room by operating the blinds (2) has the disadvantage that not only is it troublesome to operate the blinds, but it is also difficult to adjust the brightness to a predetermined level. Furthermore, when the blinds are operated, the lighting may turn on and its dimming is performed even though there is sufficient outside light, and in this case, there is also the disadvantage that energy is wasted. Ta.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to provide an automatic dimming system that can properly provide external light without operating the blinds, and that can also prevent wasteful energy consumption in lighting lamps. We are in the process of providing equipment.

[Means for solving problems]

In order to achieve the above object, the present invention includes a lighting lamp provided indoors and a light control device for controlling the light, which includes: a liquid crystal panel that introduces outside light into the room;
A transmission adjustment device that adjusts the external light transmittance of the liquid crystal panel, a sensor that detects the amount of external light, and the dimming control based on the output of the sensor only when the amount of light detected by the sensor is equal to or higher than a predetermined level. A first control means for operating the device and a second control means for operating the transmission adjustment device based on the sensor output only when the amount of light detected by the sensor is less than the predetermined level. This is achieved by doing this.

[Effect]

When the sensor detects a sufficient amount of external light, the lighting lamps are not turned on, and the light transmittance of the LCD panel is controlled by the transmission adjustment device according to the sensor's detection value, maintaining the room at an appropriate brightness. Ru.

Further, if the sensor does not detect a sufficient amount of external light, the illumination lamp is turned on and the light amount of the illumination lamp is controlled by the dimmer according to the detection value of the sensor, thereby maintaining the room at an appropriate brightness.

〔Example〕

Hereinafter, the present invention will be explained based on illustrated embodiments.

In FIG. 1, reference numeral 1 denotes a light amount sensor which is attached to the outside and generates a voltage proportional to the amount of external light when it receives the amount of external light;
2 is a liquid crystal panel window composed of a liquid crystal panel that changes light transmittance according to the input voltage, 3 is a lighting lamp that changes the amount of light according to the input voltage, and 4 is a clamp circuit that controls the voltage for a preset amount of light. If the input voltage is less than the set voltage value, a voltage proportional to the input voltage will be output, and if the input voltage is greater than or equal to the set voltage, the set voltage will be output. 5 is the reverse voltage of the input voltage. 6 is a lighting control circuit that converts the input voltage into a voltage that can appropriately change the light intensity of the illumination lamp 3 and outputs the inverting circuit; 7 is a level shift circuit; like the clamp circuit, the light intensity is set in advance; In this circuit, when the input voltage is less than the set voltage value, the output voltage is 0 volts, and when the input voltage is higher than the set voltage, the voltage is the input voltage minus the set voltage value. 8 is an inverting circuit that outputs a reversed voltage of the input voltage, similar to the inverting circuit 5, and 9 is a liquid crystal that converts the input voltage into a voltage that can appropriately change the light transmittance of the liquid crystal panel 2 and outputs it. Control circuit, a is a signal line connecting the light amount sensor 1 and the clamp circuit 4° level shift circuit 7, b is a signal line connecting the clamp circuit 4 and the inverting circuit 5, C
is a signal line connecting the inverting circuit 5 and the lighting control circuit 6, d is a signal line connecting the lighting control circuit 6 and the lighting lamp 3, e is a signal line connecting the level shift circuit 7 and the inverting circuit 8, f is a signal line connecting the inverting circuit 8 and It consists of a signal line connecting the liquid crystal control circuit 9 and a signal line connecting the liquid crystal control circuit 9 and the liquid crystal panel window 2.

10 is a desk, 11 is a chair, and 12 is a room having the desk 10 and the chair 11.

Next, the operation will be explained. The light amount sensor 1 converts the amount of external light into a voltage and outputs a waveform as shown in FIG. 2(a). This waveform is input to the clamp circuit 4 and the level shift circuit.

The output waveform of the light amount sensor 1 in FIG. 2(a) is input to the clamp circuit 4, and is converted by the clamp circuit 4 into the output waveform in FIG. 2(b). The output waveform of FIG. 2(b) is input to the inversion circuit 5, and is converted by the inversion circuit 5 into the output waveform of FIG. 2(c). The output waveform shown in FIG. 2(c) is input to the lighting control circuit 6, and is converted into the output waveform shown in FIG. The amount of light from the illumination lamp 3 is determined by FIG. 2(d). The amount of light from the illumination lamp 3 at this time is shown in FIG. 2(e). Here, the second output of the clamp circuit 4 is
The voltage setting value in Figure (b) is the voltage value of the light amount sensor 1 when the light transmittance of the liquid crystal panel window 2 is maximum and the amount of indoor light is sufficient even if the light amount of the lighting lamp 3 is the minimum. .

The output waveform of the light amount sensor 1 shown in FIG. 2(a) is input to the level shift circuit 7, and is converted by the level shift circuit 7 into the output waveform shown in FIG. 2(f). This figure 2 (f)
The output waveform of FIG. ,
Figure 2 shows how to appropriately change the light transmittance of the liquid crystal panel window 2 (
The light transmittance of the liquid crystal panel window 2 is determined by the output waveform of the liquid crystal control circuit 9 shown in FIG. It is shown in FIG. 2(i). Here, the voltage setting value at the output of the level shift circuit 7 in FIG.
The voltage setting value is the same as that in .

Here, the amount of indoor light is determined by the sum of the amount of illumination light relative to the amount of outside light shown in Figure 2 (e) and the amount of incident light relative to the amount of outside light shown in Figure 2 (i), and is always constant due to the above operation of this device. . This makes the living environment more comfortable, and also saves energy because there is no need to add extra light.

Further, as an example of this operation, when the amount of external light is at its maximum value, the amount of light from the illumination lamp 3 is such that the output voltage of the light amount sensor 1 is at its maximum,
The output voltage of the clamp circuit 4 is a set voltage value, the output voltage of the inverting circuit 5 is 0 volts, the output voltage of the lighting control circuit 6 is also 0 volts, and the amount of light from the illumination lamp 3 is minimized. The light transmittance of the liquid crystal panel window 2 is determined by the output voltage of the light sensor 1 being the maximum value, the output voltage of the level shift circuit 7 being the maximum value, and the inverting circuit 8 being the maximum value.
The voltage output is O volts, and the output voltage of the liquid crystal control circuit 9 is also 0.
volts, and the light transmittance of the liquid crystal panel window 2 becomes the minimum.

〔Effect of the invention〕

As described above, the present invention uses a sensor that detects the amount of outside light to adjust the light transmittance of the liquid crystal panel to an appropriate brightness when there is enough outside light to maintain indoor brightness. In addition, when the amount of outside light is insufficient, the lighting is turned on and the dimmer is controlled to obtain the appropriate brightness, so you can properly illuminate the outside without having to operate the blinds. Lights can be sold at bargain prices, and wasteful energy consumption in lighting lamps can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system diagram of an automatic light control device according to an embodiment of the present invention, and FIGS. 2(a), (b), (c), and (d). (e), (f), (g), (h), and (i) are the output waveforms shown in FIG. DESCRIPTION OF SYMBOLS 1... Light amount sensor, 2... Liquid crystal panel, 3... Lighting lamp, 4... Clamp circuit, 5... Inverting circuit, 6...
...Lighting control circuit, 7...Level shift circuit, 8...
・Inversion circuit, 9...Liquid crystal control circuit.

Claims (1)

[Scope of Claims] 1. A device comprising a lighting lamp installed indoors and a light control device for controlling the light, which includes a liquid crystal panel for introducing outside light into the room, and a liquid crystal panel outside the liquid crystal panel. a transmission adjustment device that adjusts light transmittance; a sensor that detects the amount of external light; and only when the amount of light detected by the sensor is equal to or higher than a predetermined level, the light control device is activated based on the output of the sensor. Automatic adjustment characterized by comprising a first control means and a second control means for operating the transmission adjustment device based on the sensor output only when the amount of light detected by the sensor is less than the predetermined level. light device. 2. In claim 1, the first control means includes a clamp circuit that clamps the output signal of the sensor when the amount of external light is equal to or higher than the predetermined level, and inverts the output signal of the clamp circuit. An automatic light control device comprising: an inverting circuit for controlling the light intensity; 3. In claim 1, the first control means includes a shift circuit that shifts the output signal of the sensor when the amount of external light is less than the predetermined level, and inverts the output signal of the shift circuit. An automatic light control device comprising: an inverting circuit for controlling the light intensity;