RU2067U1 - LIGHTED ELECTRIC SWITCH - Google Patents

Abstract

ILLUMINATED ELECTRIC SWITCH, including a device for closing and opening an electrical circuit, a source of visible radiation and contacts for connection to an external electrical circuit, characterized in that it additionally contains a photodetector with a spectral sensitivity characteristic corresponding to the spectral characteristic of the eye, and an electronic photo signal processing device, including a circuit for comparing a photo signal with a reference signal and a control circuit for a source of visible radiation, while the input of the electronic device is connected to the photodetector, the output of the electronic device is connected to the source of visible radiation, and the power supply circuits of the electronic device are connected to contacts for connecting to an external electrical circuit.

Description

Illuminated electrical switch

The utility model relates to electric switches with backlight and can be used to turn on lighting devices in low light workplace.

Various electric switches with a backlight are known, which serves to determine the location of the switch in the dark, for example, using a nozzle made of luminous material (see UK application N 2250636 class N01N9 / 18), using a ring light guide, creating a ring light due to internal reflection (see UK application N 2251918 class H01N9 / 18), using an electric light-emitting device (see US patent N 5036441 class 362-95.

For the prototype adopted switch with backlight, described in US patent N 5036441 CL.362-95.

The switch comprises a housing, an electric light-emitting device, an electromechanical contact including an external electrical circuit, two electrical contacts detachably connected to the corresponding conductors of the external electrical circuit.

The disadvantage is that the light-emitting device is not disconnected from the electric circuit, which leads to an unjustified waste of electricity.

The purpose of the utility model is to turn off the backlight in the daytime and, thereby, save energy.

To achieve this goal, a known electric switch containing a device for closing and opening an electric circuit, a source of visible radiation and contacts for connecting to an external electric circuit, further comprises a photodetector with a spectral response characteristic corresponding to the spectral characteristic of the human eye, and an electronic device for processing a photo signal, including a circuit for comparing a photo signal with a reference signal and a control circuit for a source of visible radiation In this case, the input of the electronic device through the comparison circuit is connected to the photodetector, the output of the electronic device through the control circuit of the visible radiation source is connected to the visible radiation source, and the power circuit of the electronic device is connected to the contacts for connection to an external electric circuit.

M.C. 5 F 21 V 23/04 H 01 H 9/18

This embodiment of the electric switch ensures that the source of visible radiation (backlight) is turned off only in low light.

Unexpected effects are that the proposed illuminated electrical switch is an indicator of the non-compliance of the lighting conditions with sanitary standards and provides simple and accessible monitoring of compliance with these standards.

The utility model is illustrated by the drawing, in which Fig. 1 shows a diagram of an electric switch, and in Fig. 2 and Fig. 3 are examples of a specific embodiment.

The electric switch contains (Fig. 1-) a device 1 for closing and opening an electric circuit, a source of visible radiation 2 (for example, an LED), contacts 3.4 for connecting to an external electric circuit, a photodetector 5 connected to an electronic device 6 for processing the photo signal through a comparison circuit 7, and through a control circuit 8 - with a source of visible radiation 2. An electric switch can be made powered by a battery (Fig.2) and powered by a network (Fig.Z).

In the first case (Fig. 2), the comparison circuit 7 contains a resistor 9 and a transistor 10, and the control circuit includes a transistor 11 and a resistor 12. In the second case (Fig. 3), the electronic signal processing device 6 further comprises a resistor 13, a capacitor 14, a rectifier 15, a capacitor 16, a resistor 17 and a zener diode 18, designed to power an electronic device, and the comparison circuit 7 and the control circuit 8 of the visible radiation source are resistors 19, 21, 22, 23, 24, 25, 26, 29, and transistors 20, 20, 27 and 28.

A device with a battery (figure 2) works as follows.

The photodetector 5 generates an electrical signal, the value of which is determined by the level of illumination of the workplace. This signal is evaluated by the comparison circuit 7 and, if insufficient, is transmitted to the visible radiation source control circuit, which includes the latter. If the signal from the photodetector 5 corresponds to or above the recommended level, the source of visible radiation 2 does not turn on.

If the illumination is below a certain level, the corresponding current of the photodetector 5 provides a voltage on the basis of the transistor 10, which opens the transistors 10, 11 and a sufficient current flows through the LED 2 for light indication. If the illumination level corresponds to a predetermined norm or above it, then the corresponding current of the photodetector 5 closes the transistors 10, 11 and with a decrease in the current below the threshold value, the radiation of the LED 2 stops. Setting the threshold value corresponding to the sanitary norm of illumination is performed by changing the values of the resistances of the resistors 9, 10.

When powered from the network 2EO B, 50 TC (Fig. 3) on the resistor 13, when the device 1 for closing and opening the electric circuit is open, there is a voltage close to the voltage of the network. A significant part of this voltage drops across the capacitor 14. The remaining part after the rectifier 15 is supplied with power to the electronic device 6. From the reference voltage source at the resistor 17 and the zener diode 18, the voltage is supplied to the transistor 20 through a divider on resistors 25, 24. The reference level corresponding to the threshold is set using resistor 24. If the illumination is low, the voltage at the base of transistor 20 is lower than the voltage at the base of transistor 20. In this case, transistor 20 is closed and 20 is open and flows through LED 2 current required for light indication. With increasing illumination, the voltage at the base of transistor 20 increases, and when this voltage exceeds the voltage at the base of transistor 20, the state of these transistors changes to the opposite, the current through LED 2 decreases sharply, radiation ceases, indicating that the illumination exceeds the established norm. It is possible to modify the device by introducing instead of resistor 29 an LED of a different glow color, which would give a light signal in the case of normal illumination.

Laboratory samples were manufactured and tested. A silicon photo diode was used as the photodetector, the spectral sensitivity characteristic of which was adjusted using an optical filter with the spectral characteristic of the human eye, an AL307BM LED, and KT315 transistors.

The device has been tested at the Moscow Research Institute of Hygiene. F.F. Erisman, there is a positive review of the State Committee for Sanitary and Epidemiological Surveillance of the Russian Federation and recommendations for the use of devices in schools, in production, in offices and everyday life.

The switch can be made in a separate case (including can be made in the form of a toy, souvenir, etc.) or built into a clock, desk, desk lamp, floor lamp, night light, sconce, TV, car panel, computer, and etc.

The switch, as indicated, can be configured to one level. For example, an indicator installed in the passenger compartment with the ignition on indicates that the ambient light is low and the sidelights or dipped beam must be turned on. This provides objectivity in assessing lighting and contributes to traffic safety.

The switch can be set to two levels: for example, when it is installed in a television or computer display to signal an insufficient or excessive level of illumination.

Adjustment or adjustment elements (replaceable filters, a switch or a button for changing ranges, a rheostat, etc.) can be introduced into the switch to provide an indication with the help of a single instrument of the illumination necessary for different works.

Thus, the use of the proposed utility model allows precise, continuous and simplified monitoring of compliance with lighting standards at every workplace and at home, ensuring vision and energy saving, including when the electric lighting is not turned on with sufficient natural light or adjust to it level.

f- - Zamepekuedo general

DIRY / YRA GENERAL WARION fsfv

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V.P. Ponomarenko

Claims (1)

ELECTRIC BACKLIGHT SWITCH including a device for closing and opening an electric circuit, a source of visible radiation and contacts for connecting to an external electric circuit, characterized in that it further comprises a photodetector with a spectral response characteristic corresponding to the spectral characteristic of the eye, and an electronic device for processing the photo signal including a circuit for comparing the photo signal with the reference signal and a control circuit for the source of visible radiation, while the input e ics device connected to the photodetector, the electronic device is connected to the output of visible radiation source, and an electronic device connected to the power supply circuit to the contacts for connecting an external electric circuit.