| CPC H04W 56/0035 (2013.01) [G06F 3/03545 (2013.01); G06F 3/0383 (2013.01); G06F 3/04162 (2019.05); H04W 56/003 (2013.01); G06F 3/04182 (2019.05); G06F 3/04184 (2019.05); G06F 3/0442 (2019.05); G06F 2203/0384 (2013.01)] | 20 Claims |
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1. A method for determining a tolerance specification of a clock synchronization between a touch display device and a stylus, the method comprising:
determining, by processing circuitry of an apparatus, an accumulated timing error between the touch display device and the stylus based on crystal inaccuracies of the touch display device and the stylus, connection interval of Bluetooth communication between the touch display device and the stylus, and a number of consecutive failed transmissions of the Bluetooth communication;
determining, by the processing circuitry, a total processing delay based on a first processing delay and a second processing delay, the first processing delay being a time difference between a sending time of sending a synchronization signal from touch driving circuitry of the touch display device and a receiving time of receiving the synchronization signal by Bluetooth circuitry of the touch display device, the second processing delay being a time difference between a sending time of sending a Bluetooth packet from the touch display device and a receiving time of receiving the Bluetooth packet by the stylus; and
determining, by the processing circuitry, the tolerance specification of the clock synchronization based on the accumulated timing error and the total processing delay,
wherein the clock synchronization is performed based on the tolerance specification.
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