Self-Capacitance Measurement
First Claim
1. A method comprising:
- modifying an amount of charge of a capacitance of a touch sensor, the modified amount of charge resulting in a voltage at the capacitance being a first pre-determined voltage level;
applying charge to an electrode associated with the capacitance resulting, after a pre-determined amount of time, in a first pre-determined amount of charge on the capacitance, the application of the first pre-determined amount of charge to on the capacitance modifying the voltage at the capacitance from the first pre-determined voltage level to a first charging voltage level;
determining a first difference between the first charging voltage level resulting from the first pre-determined amount of charge and a reference voltage level; and
determining whether a touch input to the touch sensor has occurred based on the first difference.
19 Assignments
0 Petitions
Accused Products
Abstract
In one embodiment, a method includes modifying an amount of charge of a capacitance of a touch sensor. The modified amount of charge resulting in a voltage at the capacitance being a first pre-determined voltage level. The method also includes applying a first pre-determined amount of charge to the capacitance. The application of the first pre-determined amount of charge to the capacitance modifying the voltage at the capacitance from the first pre-determined voltage level to a first charging voltage level. The method also includes determining a first difference between the first charging voltage level and a reference voltage level; and determining whether a touch input to the touch sensor has occurred based on the first difference.
-
Citations
21 Claims
-
1. A method comprising:
-
modifying an amount of charge of a capacitance of a touch sensor, the modified amount of charge resulting in a voltage at the capacitance being a first pre-determined voltage level; applying charge to an electrode associated with the capacitance resulting, after a pre-determined amount of time, in a first pre-determined amount of charge on the capacitance, the application of the first pre-determined amount of charge to on the capacitance modifying the voltage at the capacitance from the first pre-determined voltage level to a first charging voltage level; determining a first difference between the first charging voltage level resulting from the first pre-determined amount of charge and a reference voltage level; and determining whether a touch input to the touch sensor has occurred based on the first difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 21)
-
-
8. A computer-readable non-transitory storage medium embodying logic configured when executed to:
-
modify an amount of charge of a capacitance of a touch sensor, the modified amount of charge resulting in a voltage at the capacitance being a first pre-determined voltage level; apply charge to an electrode associated with the capacitance resulting, after a pre-determined amount of time, in a first pre-determined amount of charge to on the capacitance, the application of the first pre-determined amount of charge to on the capacitance modifying the voltage at the capacitance from the first pre-determined voltage level to a first charging voltage level; determine a first difference between the first charging voltage level resulting from the first pre-determined amount of charge and a reference voltage level; and determine whether a touch input to the touch sensor has occurred based on the first difference. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A device comprising:
-
a measurement circuit; and a computer-readable non-transitory storage medium coupled to the measurement circuit and embodying logic configured when executed to; modify an amount of charge of a capacitance of a touch sensor, the modified amount of charge resulting in a voltage at the capacitance being a first pre-determined voltage level; apply charge to an electrode associated with the capacitance resulting, after a pre-determined amount of time, in a first pre-determined amount of charge to on the capacitance, the application of the first pre-determined amount of charge to on the capacitance modifying the voltage at the capacitance from the first pre-determined voltage level to a first charging voltage level; determine a first difference between the first charging voltage level resulting from the first pre-determined amount of charge and a reference voltage level; and determine whether a touch input to the touch sensor has occurred based on the first difference. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification