US 2011/0298734 A1Published application

Threshold compensation method on touch device

AssigneeAu Optronics Corporation

InventorsCheng-Hsiang HO, Yu-Min HSU

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Abstract

The disclosure provides a threshold compensation method applied to a touch device including a plurality of touch points. The threshold compensation method includes steps of: selecting at least one of the plurality of touch points as a selected object; obtaining a sensing data of each the touch point of the selected object in each of multiple initializing frequency periods; obtaining a sensing data difference value between the sensing data of each the touch point of the selected object in each adjacent two of the initializing frequency periods; obtaining a maximum sensing data difference value in the multiple sensing data difference values of the selected object in the multiple initializing frequency periods; and setting a default threshold of the selected object according to the maximum sensing data difference value.

Claims13

Dependent claims

A threshold compensation method applied to a touch device comprising a plurality of touch points, the threshold compensation method comprising steps of:

selecting at least one of the plurality of touch points as a selected object;
obtaining a sensing data of each the touch point of the selected object in each of multiple initializing frequency periods;
obtaining a sensing data difference value between the sensing data of each the touch point of the selected object in each adjacent two of the initializing frequency periods;
obtaining a particular sensing data difference value according to the multiple sensing data difference values of the selected object in the multiple initializing frequency periods, wherein the particular sensing data difference value is selected from a maximum sensing data difference value in the multiple sensing data difference values, an average of the maximum sensing data difference value and a minimum sensing data difference value in the multiple sensing data difference values, and a median sensing data difference value in the multiple sensing data difference values;
and
setting a default threshold of the selected object according to the particular sensing data difference value.

3 more elements

A threshold compensation method, applied to a touch device comprising a plurality of touch points, the threshold compensation method comprising steps of:

obtaining a sensing data of each the touch point of a selected object selected from the plurality of touch points;
obtaining a baseline difference value between a sensing data of each the touch point of the selected object in a frequency period and a baseline of the selected object, and thereby obtaining at least one baseline difference value;
obtaining a maximum baseline difference value in the at least one baseline difference value;
and
determining whether updating a current dynamic threshold of the selected object according to a comparison result of the maximum baseline difference value to the current dynamic threshold of the selected object;
and
updating the current dynamic threshold of the selected object according to the maximum baseline difference value if the maximum baseline difference value is not greater than the current dynamic threshold of the selected object.

4 more elements

Dependencies are inferred from the claim text.