Method of detecting a touch event for a touch panel and related device
AssigneeNovatek Microelectronics Corp.
InventorsHe-Wei Huang, Hui-Hung Chang, Chih-Yuan Chang
Life of this patent
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Abstract
A method of detecting a touch event for a touch panel which comprises a plurality of intersecting traces. The method includes outputting a charge control signal to a trace of the plurality of traces, and keeping other traces except for the trace floating and determining whether the touch event happens according to a voltage signal on the trace.
Claims25
A method of detecting a touch event for a touch panel comprising a plurality of intersecting traces, the method comprising:
- only outputting a charge control signal to a single trace of the plurality of traces and keeping other traces except for the trace floating;
- and
- determining whether the touch event happens according to a voltage signal on the trace.
A touch control device comprising:
- an analog-to-digital (A/D) converter coupled to the plurality of traces of a touch panel for outputting a charge control signal to a trace of the plurality of traces, and converting a first voltage signal into a first value;
- a microprocessor coupled to the A/D converter;
- and
- a wakeup circuit coupled to the A/D converter and the microprocessor, for comparing the first value with a threshold for generating a comparison result, and for controlling on and off states of the microprocessor according to the comparison result, wherein the threshold is utilized for determining whether a touch event happens.
A method of controlling a touch panel comprising a plurality of intersecting traces for a touch control device, the method comprising:
- determining whether a touch event does not happen for a predetermined time;
- and
- performing a sleep mode and a pre-wakeup mode in turns on determining that the touch event does not happen for the predetermined time, wherein in the pre-wakeup mode, the touch control device only outputs a charge control signal to a single trace of the plurality of traces and keeps other traces except for the trace floating.
A method of detecting a touch event for a touch panel comprising N intersecting traces, the method comprising:
- only outputting a charge control signal to a single traces of the N traces and keeping other traces except for the single trace of the N traces floating;
- and
- determining whether the touch event happens according to a voltage signal on the single traces.
A method of detecting a touch event for a touch panel comprising N intersecting traces, the method comprising:
- only outputting a charge control signal to a single trace of the N traces;
- determining whether the touch event happens by scanning the single traces of the N traces and keeping other traces except for the single traces of the N traces floating;
- and
- determining a location of the touch event after determining that the touch event happens.
Dependencies are inferred from the claim text.