Abstract: The present disclosure provides a method for wireless communication, which is applicable to wireless communication between the active pen and the plurality of touch screens, the plurality of touch screens respectively correspond to a plurality of wireless channels, a respective wireless channel is used for wireless communication between a touch screen and the active pen, and the method includes: the active pen sends a coding signal to the first touch screen; the active pen receives a wireless signal sent by the first touch screen, the wireless signal carries identification information of the first touch screen; the active pen identifies the first touch screen that is currently close to or in contact with the active pen according to the identification information of the first touch screen; and the active pen sends a wireless message to the first touch screen through the wireless channel corresponding to the first touch screen.

Abstract: The disclosure discloses a dual-spring all-plastic vacuum pump which includes a base and a pressing head. A feeding hole is formed in a bottom of the base, an accommodating cavity is defined by assembly of the pressing head and the base, the feeding hole is in communication with the accommodating cavity, and a limiting cover, a plastic one-way spring, a discharging member and a plastic reset spring are disposed in the accommodating cavity. The limiting cover surrounds the feeding hole, a guide hole in a top of the limiting cover is in communication with an interior of the limiting cover, the plastic one-way spring is clamped between the base and the limiting cover, a fixed end of the plastic one-way spring is in connection and communication with the feeding hole, a stressed end of the plastic one-way spring is in communication with the guide hole, and the fixed end and the stress are opposite.

Abstract: The disclosure discloses a dual-spring all-plastic vacuum pump which includes a base and a pressing head. A feeding hole is formed in a bottom of the base, an accommodating cavity is defined by assembly of the pressing head and the base, the feeding hole is in communication with the accommodating cavity, and a limiting cover, a plastic one-way spring, a discharging member and a plastic reset spring are disposed in the accommodating cavity. The limiting cover surrounds the feeding hole, a guide hole in a top of the limiting cover is in communication with an interior of the limiting cover, the plastic one-way spring is clamped between the base and the limiting cover, a fixed end of the plastic one-way spring is in connection and communication with the feeding hole, a stressed end of the plastic one-way spring is in communication with the guide hole, and the fixed end and the stress are opposite.

Abstract: The present disclosure provides a method for wireless communication, which is applicable to wireless communication between the active pen and the plurality of touch screens, the plurality of touch screens respectively correspond to a plurality of wireless channels, a respective wireless channel is used for wireless communication between a touch screen and the active pen, and the method includes: the active pen sends a coding signal to the first touch screen; the active pen receives a wireless signal sent by the first touch screen, the wireless signal carries identification information of the first touch screen; the active pen identifies the first touch screen that is currently close to or in contact with the active pen according to the identification information of the first touch screen; and the active pen sends a wireless message to the first touch screen through the wireless channel corresponding to the first touch screen.

Abstract: Some embodiments of the present disclosure provide a method for transmitting and receiving a signal, a processor chip, an active stylus, and a touch screen. The method for transmitting a signal includes: acquiring, based on detected pressure information, codes representing pressure information and used to detect tip positions, where the code includes n code bits, n being an integer greater than 1; generating n coded signals respectively corresponding to the n code bits; and transmitting each coded signal in the coded signals at the preset first or second frequency or prohibiting transmission of each coded signal in the coded signals, where the first frequency, the second frequency and prohibited transmission of the n coded signals relate to the pressure information.

Abstract: A method for pressure calculation and an apparatus thereof, an electronic device and a touch system are provided. The method for pressure calculation includes: sampling, within a preset sampling period, a phase-encoded driving signal that is continuously provided to obtain a sampled driving signal; and calculating pressure data within the sampling period according to a phase difference between adjacent frames of the sampled driving signal within the sampling period. By using the method for pressure calculation, a report rate is increased, handwriting follow ability is further improved, and handwriting experience is improved.

Abstract: A signal driving method is provided, configured for a stylus to send a driving signal to a touch screen, where the driving signal is configured for the touch screen to determine location information and/or pressure information of the stylus on the touch screen. The method includes: the stylus detecting an uplink signal sent by the touch screen according to a first signal driving mode; and the stylus switching from a first signal driving mode to a second signal driving mode according to a detection result of the above uplink signal.

Abstract: A method for pressure detection is provided, which can avoid a delayed display of a writing pressure generated by the active pen on the screen. The active pen includes a first electrode, a second electrode and a pressure sensor, where the first electrode is configured to output a first driving signal, the second electrode is configured to output a second driving signal when the pressure sensor detects a first pressure generated by the active pen. The method includes: when information of the first pressure is not received, determining whether the active pen is pressing the screen according to the second detecting signal; if it is determined that the active pen is pressing the screen, displaying handwriting of the active pen on the screen according to a second pressure, where the second pressure is a preset pressure.

Abstract: A method for pressure detection is provided, which can avoid a delayed display of a writing pressure generated by the active pen on the screen. The active pen includes a first electrode, a second electrode and a pressure sensor, where the first electrode is configured to output a first driving signal, the second electrode is configured to output a second driving signal when the pressure sensor detects a first pressure generated by the active pen. The method includes: when information of the first pressure is not received, determining whether the active pen is pressing the screen according to the second detecting signal; if it is determined that the active pen is pressing the screen, displaying handwriting of the active pen on the screen according to a second pressure, where the second pressure is a preset pressure.

Abstract: Some embodiments of the present disclosure provide a method for transmitting and receiving a signal, a processor chip, an active stylus, and a touch screen. The method for transmitting a signal includes: acquiring, based on detected pressure information, codes representing pressure information and used to detect tip positions, where the code includes n code bits, n being an integer greater than 1; generating n coded signals respectively corresponding to the n code bits; and transmitting each coded signal in the coded signals at the preset first or second frequency or prohibiting transmission of each coded signal in the coded signals, where the first frequency, the second frequency and prohibited transmission of the n coded signals relate to the pressure information.

Abstract: A method for pressure calculation and an apparatus thereof, an electronic device and a touch system are provided. The method for pressure calculation includes: sampling, within a preset sampling period, a phase-encoded driving signal that is continuously provided to obtain a sampled driving signal; and calculating pressure data within the sampling period according to a phase difference between adjacent frames of the sampled driving signal within the sampling period. By using the method for pressure calculation, a report rate is increased, handwriting follow ability is further improved, and handwriting experience is improved.