Inter-chip synchronous detection method for sensing signal, driving device and touch device

Abstract

The invention provides an inter-chip synchronous detection method for sensing signals, a driving device and a touch device. The invention discloses an inter-chip synchronous detection method for induction signals. The method comprises the steps that a main chip generates an excitation signal based on a first clock signal of the main chip; known excitation information and excitation signals are sent to each slave chip; the main chip outputs a first driving control signal group based on the excitation information so as to detect an induction signal of a touch area corresponding to the touch panel; the slave chip determines the cycle number of a second clock signal of the slave chip corresponding to the cycle of the excitation signal; based on the excitation information and the cycle number of the second clock signal, outputting a second driving control signal group to detect an induction signal of a touch area corresponding to the touch panel; therefore, the slave chips and the master chip synchronously detect induction signals. By adopting the method and the device, each slave chip and the master chip can synchronously detect the sensing signal, and effective touch sensing is carried out.

Description

technical field [0001] The present application relates to the field of display technology, in particular, the present application relates to an inter-chip synchronous detection method of sensing signals, a driving device and a touch device. Background technique [0002] As the size of display products increases, a display product requires multiple driver chips to drive it. Touch devices are produced based on technology with rich functions. At present, the most used touch technology is In-cell touch technology (that is, display and touch integration technology), which adopts TDDI (Touch and Display Driver Integration, touch and display driver integration). display driver integration) to drive it. Similarly, with the increase of display product size, the number of its driving chips is also increasing. Currently, it has become common to use multiple integrated touch and display chips to realize touch and display driving. [0003] Where multiple TDDI chips are used, each TDDI...

AI Technical Summary

Problems solved by technology

[0005] However, because the clocks between the chips are not synchronized or the frequencies do not match, the performance of touch sensing is degraded. For example, when the clock frequency of the master chip is lower than the clock frequency of the slave chip, time will be wasted. An error occurs when the clock frequency of the chip

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