Shenzhen Goodix Technology Co., Ltd.

Huawei Technologies Co., Limited

Guanjun Zhang

Hong Jiang

Hideo Kato

Lin Feng

Yaming Jiang

Lei Bai

Lingyu Tang

Shibo Li

Feipeng Jiang

The present application provides a method of signal transmission, which can improve transmission performance of an uplink signal between a touch screen and a stylus. The method is performed by a touch control chip in an electronic device, a touch screen of the electronic device includes a transmission channel for sending an uplink signal to a stylus, and the method includes: detecting whether a user's hand and/or the stylus approaches or touches the touch screen; determining a sending mode of the uplink signal according to a detection result, where the transmission channel for sending the uplink signal in the touch screen is different in different sending modes.

Method of signal transmission, touch control chip and electronic device

Some embodiments of the present disclosure provide a signal processing system, a chip and an active stylus. The signal processing system includes: a pre-amplifier circuit, configured to pre-amplify a received DSSS signal and output a pre-amplified DSSS signal; a low-pass filter circuit, configured to filter the pre-amplified DSSS signal and output a filtered DSSS signal; an analog-to-digital converter circuit, configured to sample the filtered DSSS signal and output a sampled DSSS signal; a noise detecting and filtering-out circuit, configured to filter out a noise in the sampled DSSS signal and output a noise-filtered DSSS signal; and a digital demodulation circuit, configured to demodulate the noise-filtered DSSS signal to output a demodulated signal. The signal processing system can have strong anti-interference ability and high sensitivity through the noise detecting and filtering-out circuit and automatically controlling a gain of the pre-amplifier circuit.

Signal processing system, chip and active stylus

A device includes a first body, a second body, and a rotating shaft connection mechanism configured to connect the first body and the second body. The rotating shaft connection mechanism includes N rotating shaft components, a connection component, and N movable linear components corresponding to the N rotating shaft components. An ilinear component is wound around a rotating shaft of a corresponding irotating shaft component. A segment of extending linear component and a segment of extending linear component separately pass through the connection component. When the second body rotates relative to the first body, the segment of linear component and the segment of linear component have different rotation radii.

Device with opening and closing performance

Some embodiments of the present disclosure provide a method and a system for transmitting a signal, an active stylus, a touch screen and a readable storage medium. The method for transmitting a signal comprises: receiving a DSSS signal sent by the touch screen through a coupling capacitor formed between the active stylus and the touch screen, where the DSSS signal is a spread-spectrum coded signal to be transmitted; and parsing the received DSSS signal to obtain the signal to be transmitted. The method requires just a small amount of additional hardware resources and low power consumption, and can be well applied to an active stylus touch system.

Method and system for transmitting signal, active stylus, touch screen and readable storage medium

The present disclosure provides a detection circuit and an electronic device. The detection circuit includes a driving circuit, a cancelling circuit, and a switching circuit. Each driving module of the driving circuit is coupled to a detection capacitor for charging it; each cancelling module of the cancelling circuit is coupled to the detection capacitor to perform capacitance cancellation through two directions; each cancelling module of the cancelling circuit is coupled to the switching module to perform conversion of a capacitive signal and then output. The present disclosure can improve a detection accuracy of the capacitor.

Detection circuit and electronic device

Provided are a capacitance detection circuit (). The capacitance detection circuit () is used for detecting capacitances of N capacitors to be detected, and includes: a reference capacitor, at least N&#x2212;1 first front end circuits () for converting capacitance signals of the capacitors to be detected into first voltage signals and performing differencing on the first voltage signals, at least one second front end circuit () for converting capacitance signals of a capacitor to be detected and a reference capacitor into second voltage signals and performing differencing on the second voltage signals, and a processing circuit (); and the processing circuit () determines a capacitance value of each of the N capacitors to be detected according to a first differential signal output by each of the first front end circuits () and a second differential signal output by each of the second front end circuits ().

Capacitance detection circuit, capacitance detection method, touch detection apparatus, and terminal device

The present application provides a method and apparatus for signal transmission, and a method and apparatus for signal reception, where the method for signal transmission is applied to an active stylus, including: phase encoding information to be transmitted using a preset phase signal, to obtain an encoded signal; and transmitting a stylus tip signal, where the stylus tip signal comprises the encoded signal. The present application can increase amount of information transmitted between the active stylus and a touch control screen in a limited duration.

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Shenzhen, China

Guanjun Zhang