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Common voltage generation circuit, common voltage generation method and touch display panel

A touch display panel, common voltage technology, used in electrical digital data processing, instruments, calculations, etc.

Active Publication Date: 2019-09-03
NANJING CEC PANDA FPD TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a common voltage generating circuit, a common voltage generating method and a touch display panel, so as to solve the problem of horizontal stripes near the junction of touch electrodes, and at the same time suppress voltage fluctuations caused by factors such as other signal interference

Method used

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  • Common voltage generation circuit, common voltage generation method and touch display panel
  • Common voltage generation circuit, common voltage generation method and touch display panel
  • Common voltage generation circuit, common voltage generation method and touch display panel

Examples

Experimental program
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Effect test

Embodiment 1

[0076] The common voltage signal adjustment module 20 of this embodiment includes an analog delay submodule, a delay calculation submodule, an amplitude calculation submodule, and a signal generation submodule;

[0077] The analog delay sub-module receives the measured common voltage signal, simulates the capacitance and resistance of the touch display panel to perform delay calculation on the measured common voltage signal, and then outputs the simulated common voltage signal;

[0078] The delay calculation sub-module calculates the delay time according to the measured common voltage signal and the simulated common voltage signal;

[0079] The amplitude calculation sub-module sets the amplitude ratio according to the measured public voltage signal and the simulated public voltage signal;

[0080]The signal generation sub-module calculates the adjusted common voltage signal according to the delay time, the amplitude ratio, the measured common voltage signal and the preset comm...

Embodiment 2

[0097] The common voltage signal adjustment module 20 of this embodiment includes a frequency domain conversion submodule, an analog delay submodule, a transfer function calculation submodule, a frequency domain signal generation submodule, and a time domain conversion submodule;

[0098] The frequency domain conversion sub-module converts the preset common voltage signal into a preset frequency domain common voltage function, and converts the measured common voltage signal into a measured frequency domain common voltage function;

[0099] The transfer function calculation sub-module calculates the transfer function according to the design value of the touch display panel or the data obtained by detecting the panel, and the transfer function is used to simulate the signal delay on the signal transmission line 41;

[0100] The frequency domain signal generation sub-module calculates the adjusted frequency domain common voltage function according to the preset frequency domain co...

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Abstract

The invention discloses a common voltage generation circuit and a common voltage generation method applying the common voltage generation circuit. The method comprises the following steps of presetting a common voltage; detecting and recording a real-time change waveform of an actual voltage on a touch electrode in a preset common voltage environment; combining the factors, such as a preset waveform, the delay of a panel signal transmission system, etc., to calculate the optimized common voltage waveform, so that the actual voltage waveforms of the touch electrodes subjected to each line of Gate Cuple are consistent, the cross grain problem near the touch electrode boundary is improved, and the voltage fluctuation caused by other signal interference and other factors can be suppressed. Theinvention also discloses a touch display panel comprising the common voltage generation circuit.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a common voltage generation circuit, a common voltage generation method and a touch display panel. Background technique [0002] Embedded touch screen technology can not only increase the integration of panels to reduce costs, but also better meet users' needs for thinner and lighter electronic devices. Such as figure 1 As shown, the existing embedded touch screen technology usually divides the common electrode into small pieces as touch electrodes (Sensor) 11, each touch electrode corresponds to a plurality of pixel units, and the driving chip 13 (IC) passes the touch signal transmission line 12 Send touch signals to the touch electrodes. [0003] figure 2 It is a schematic structural diagram of two adjacent touch electrodes 12, image 3 is a common voltage signal waveform corresponding to one touch electrode 12 in the touch display panel, image 3 From left to ri...

Claims

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Application Information

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IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/044G06F3/0412
Inventor 张芹黄洪涛齐灿夏迪
Owner NANJING CEC PANDA FPD TECH CO LTD