Signal transmitting method, active pen, signal receiving method, and touch screen

Abstract

The present application relates to the field of signal processing technologies, and provides a signal transmitting method, an active pen, a signal receiving method, and a touch screen. The image signal transmission method comprises: separately performing amplitude modulation on the n binary codes representing the information to be transmitted, to obtain n sequentially arranged coded amplitude modulation signals, where n is an integer greater than 1; and sequentially arranging the n coded amplitude modulation signals continuously And transmitting, wherein the coded amplitude modulation signal with the odd number is transmitted at a preset first frequency, and the coded amplitude modulation signal with the even number is arranged to be transmitted at the preset second frequency. In the present application, n coded amplitude modulation signals are continuously transmitted alternately at the first frequency and the second frequency, thereby eliminating the fault tolerance time between therespective coded amplitude modulation signals and reducing the transmission time of the same number of coded amplitude modulation signals, correspondingly The time required for the screen end to complete the detection of the amplitude modulation signal is reduced, thereby improving the reporting rate and improving the anti-interference ability of the touch screen.

Description

technical field [0001] The present application relates to the technical field of signal processing, in particular to a signal transmitting method, an active pen, a signal receiving method and a touch screen. Background technique [0002] With the popularity of capacitive touch screens, the application of capacitive active pens is becoming more and more extensive. When the user uses the capacitive active pen, the capacitive touch screen detects the coding signal of the screen body and the coding signal of the active pen in time-sharing; among them, the screen body detection time of the capacitive touch screen is a key factor affecting the reporting rate of the active pen. The higher the rate, the faster the screen responds to the writing of the active pen. With the improvement of users' requirements for the writing experience and touch experience of the active pen, the requirements for the reporting rate of the active pen are also getting higher and higher. [0003] The inv...

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Problems solved by technology

[0003] The inventor finds that the prior art has at least the following problems: In the existing encoding method, please refer to figure 1 , when the active pen is transmitting signals, due to the synchronization problem between the pen end and the screen end, in order to ensure that the signals of each bit (bit) detected by the screen end will not affect each other, it is necessary to leave a fault-tolerant time t between each bit, resulting in The detection time of the active pen occupying the touch screen is longer, which affects the reporting rate of the active pen, and the anti-interference ability of the screen is weak

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