| CPC G06F 3/04162 (2019.05) [G06F 3/03545 (2013.01); G06F 3/04166 (2019.05); G06F 3/04186 (2019.05); G06F 3/0421 (2013.01); G06F 3/0441 (2019.05); G06F 3/0442 (2019.05); G06F 3/0446 (2019.05)] | 9 Claims |
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1. A sensor controller connected to a sensor pattern, the sensor controller comprising:
a processor; and
a memory storing at least one program that, when executed, causes the sensor controller to:
i) detect a pen signal transmitted via a pen electrode provided at a distal end of an active pen;
ii) detect a position of the active pen based on a level of the pen signal detected;
iii) determine a distance between a current position of the active pen detected by currently performing i) and ii), and a previous position of the active pen detected by previously performing i) and ii);
iv) when the distance exceeds a threshold value, output pen-up information indicative of the active pen separated from a touch surface and thereafter output the current position of the active pen; and
v) when the distance does not exceed the threshold value, without outputting the pen-up information, output the current position of the active pen.
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