Touch sensing method capable of dynamically adjusting tough threshold value
AssigneeNovatek Microelectronics Corp.
InventorsShun-Li Wang, Jyun-Sian Li, Chih-Chang Lai
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Abstract
A touch sensing method for a touch panel is provided. The touch sensing method includes following steps. First, a plurality of sensing values of a plurality of sensing points are received so as to calculate a plurality of sensing difference values according to the sensing values. Next, a touch threshold value is determined according to at least one (e.g., a maximum one) of the sensing difference values. Then, the sensing difference values are compared with the touch threshold value to determine the coordinates of the touched ones of the sensing points according to the comparison result.
Claims10
A touch sensing method, adapted to a touch panel, and the touch sensing method comprising:
- receiving a plurality of sensing values of a plurality of sensing points to calculate a plurality of sensing difference values according to the sensing values;
- determining a touch threshold value from at least two different touch threshold values after receiving a first sensing difference value each time, which are time-independent parameters, according to a comparison result, wherein the comparison result is generated by comparing the first sensing difference value with a predetermined value, and the first sensing difference value is determined from the sensing difference values;
- and
- comparing the sensing difference values with the touch threshold value, and determining which one in the sensing points is touched according to a second comparison result, and
- increasing the touch threshold value when a maximum sensing difference value of the sensing difference values is greater than the predetermined value,
- and decreasing the touch threshold value when a maximum sensing difference value of the sensing difference values is smaller than the predetermined value.
Dependencies are inferred from the claim text.