Electronic devices, near-field wireless communications system and method for establishing a wireless communications link between two electronic devices

摘要

An electronic device with touch-link functionality includes a touch panel, a signal processing circuit and a controller. The touch panel includes a first transmitting electrode for transmitting a first signal. The signal processing circuit provides the first signal to the first transmitting electrode. The first signal has a first frequency that is adjustable. The controller is coupled to the touch panel and the signal processing circuit. The controller adjusts the first frequency to make the first frequency correspond to an effective communications range. Within the effective communications range, another electronic device with touch-link functionality is able to receive the first signal, whereas outside the effective communications range, the another electronic device with touch-link functionality is unable to receive the first signal.

主权项

1. An electronic device with touch-link functionality, comprising:
a touch panel, comprising a first transmitting electrode for transmitting a first signal; a signal processing circuit, providing the first signal to the first transmitting electrode, wherein the first signal has a first frequency that is adjustable; and a controller, coupled to the touch panel and the signal processing circuit, adjusting the first frequency to make the first signal correspond to an effective communications range, wherein within the effective communications range, another electronic device with touch-link functionality is able to receive the first signal, whereas outside the effective communications range, the another electronic device with touch-link functionality is unable to receive the first signal; wherein the touch panel is further configured for receiving a second signal transmitted by the another electronic device; wherein the signal processing circuit is further configured for demodulating the second signal according to another receiving frequency, wherein the another receiving frequency is adjustable, wherein the controller determines the frequency of the first signal according to the effective communications range by: determining a plurality of different test frequencies according to the effective communications range; transmitting the first signal at the plurality of different test frequencies in turn in a test phase; and selecting at least one from the one or more preferred frequencies as the frequency of the first signal, wherein the first signal is received by a touch panel of the another electronic device and demodulated according to the plurality of different test frequencies by the another electronic device; wherein one or more preferred frequencies is selected from the plurality of different test frequencies according to strength of the first signal or suffered interference of the first signal by the another electronic device; and wherein information regarding the one or more preferred frequencies is transmitted to the first electronic device via the second signal by the another electronic device.