Touch sensor controlled switch with intelligent user interface
A module for controlling power supply to a load in a product which includes a microchip, and an electromechanical switch and a proximity/touch sensor connected to the microchip, preferably to the same input. The switch is primarily used to activate or deactivate the load and the proximity/touch sensor to vary the effect of operating the switch, or to control additional functions such as the activation of a signal, typically a light signal, which helps to locate the product, particularly in the dark, and to vary the duration of an automatic time-out period at the end of which the load is deactivated.
1. An electronic switch module for use in a product with an energy consuming load, said module comprising:
a microchip;
at least one capacitive sensing proximity/touch sensor interface element functioning as a switch, at least partially implemented in said microchip;
said module configured to receive an input signal from the proximity/touch user interface;
wherein said microchip is further configured to function such that upon activation of the product or the load, the proximity/touch sensor interface establishes a touch condition reference level which is used to determine when a no-touch condition occurs to deactivate the load and wherein adjustment of the touch condition reference level is frozen while the no-touch condition is maintained.
2. The electronic switch module of claim 1 , An wherein an operating mode of the product is automatically changed when a no-touch condition is detected.
3. An electronic switch module according to claim 2 wherein the product comprises an electric motor.
4. An integrated circuit according to claim 1 , wherein only a low power level indication signal is provided, upon receipt of the proximity or touch event indication signal from the proximity/touch user interface switch, during a predetermined period after deactivation of the load.
5. An electronic switch module according to claim 1 wherein at least one electromechanical switch and the at least one proximity/touch sensor form a user interface and are connected to the microchip.
6. An electronic switch module according to claim 1 , wherein a capacitive sensing reference level set for a no-touch condition is used to detect a proximity event and a capacitive sensing reference level set for a touch condition is used to detect a no-touch condition.
7. An electronic switch module according to claim 6 wherein the product comprises a DC power source and RF circuitry.
8. An electronic switch module according to claim 6 wherein the product comprises a DC power source and RF circuitry or an electric motor.
9. An electronic switch module according to claim 1 wherein the product comprises a DC power source and RF circuitry.
10. An electronic switch module according to claim 1 wherein the product comprises RF circuitry and an electric motor.
11. An electronic switch module according to claim 10 , including electromechanical switches which are used for selecting a command/function of the microchip.
12. A method of operating a capacitive sensing module to be used in a product with an energy consuming load, said module including a microchip and at least one capacitive sensing proximity/touch sensor interface element functioning as a switch, at least partially implemented in said microchip, said module configured to receive an input signal from the proximity/touch user interface and wherein said microchip is further configured to function such that upon activation of the product or the load, the proximity/touch sensor interface establishes a touch condition reference level which is used to determine when a no-touch condition occurs to deactivate the load and wherein adjustment of the touch condition reference level is frozen while the no-touch condition is maintained.
13. The method according to claim 12 further including the step of re-activating the load when a touch condition is detected.
14. The method according to claim 12 further including the step of re-activating the load when a proximity condition is detected.
15. The method according to claim 14 wherein the proximity condition is determined using a reference level established during a no-touch condition.
16. The method according to claim 12 wherein a proximity condition is determined using a capacitive sensing reference level established during a no-touch condition and wherein a power source level or product status indication is given upon detecting a proximity condition.