Photoswitch
AssigneeQicheng Electrical Equipment Co., Ltd.
InventorXuanfeng Ye
Life of this patent
Estimating the term…
Abstract
A photoswitch includes a DC power supply, a luminance controlling circuit and a lightening apparatus. The luminance controlling circuit includes a relay RL1, a trigger circuit module, a delay discharge circuit module, a photosensitive element and an adjusting circuit module. The trigger circuit module includes a NPN triode Q1, a NPN triode Q2, NPN triode Q3, a resistor R3 and a resistor R6; the adjusting circuit module includes a resistor R4 and a resistor R5 and a resistor R7, one end of which is in connection with the current output end of the resistor R4 and the other of is in connection with the current input end of the relay RL1; a current value of a subcircuit with the resistor R7 and the relay RL1 is smaller than a pull-in current value or a release current value of the relay RL1.
Claims20
A photoswitch, comprising
- a DC power supply, comprising a positive electrode and a negative electrode;
- a luminance controlling circuit, in electrical connection with said DC power supply;
- a lightening apparatus, controlled by said luminance controlling circuit;
- wherein said luminance controlling circuit comprises a relay (RL1), comprising a current input end, a current output end and a contact;
- a trigger circuit module, comprising a current output end, a NPN triode (Q1), a NPN triode (Q2), and a PNP triode (Q3), adapted for switching on or switching off said relay (RL1);
- a delay discharge circuit module, comprising a positive electrode and a negative electrode, adapted for supplying power for said trigger circuit module and activating said trigger circuit module;
- a photosensitive element (1), in series connection with said delay discharge circuit module;
- and
- an adjusting circuit module, comprising a resistor (R4), a resistor (R5) and a resistor (R7), adapted for setting a value of luminance for turning on or off a light;
- said contact of said relay (RL1), in series connection with said lightening apparatus, is adapted for switching on or switching off said lightening apparatus;
- said current output end of said trigger circuit module is in connection with said relay (RL1);
- a collector and a base of said triode (Q1) are in connection with said positive electrode and said negative electrode of said delay discharge circuit module respectively, and the collector of said triode (Q1) is further in connection with said positive electrode of said DC power supply, and a emitter of said triode (Q1) is in connection with said negative electrode of said DC power supply through a resistor (R3), and the emitter of said triode (Q1) is further in connection with the emitter of said triode (Q2);
- a base of said triode (Q2) is in connection with a current output end of a resistor (R4), and said resistor (R4) and a resistor (R5) are in series connection with each other and arranged between said positive electrode and said negative electrode of said DC power supply, and a collector of said triode (Q2) is in connection with said positive electrode of said DC power supply through a series resistor (R6);
- a base of said triode (Q3) is in connection with a collector of said triode (Q2), and an emitter of said triode (Q3) is in connection with said positive electrode of said DC power supply, and a collector of said triode (Q3) is in connection with said current input end of said relay (RL1);
- a current output end of said delay discharge circuit module is in connection with said trigger circuit module;
- one end of said resistor (R7) is in connection with a current output end of said resistor (R4) and the other end is in connection with said current input end of said relay (RL1);
- a current value of a subcircuit with said resistor (R7) and said relay (RL1) is smaller than a pull-in current value or a release current value of said relay (RL1).
Dependencies are inferred from the claim text.