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Dynamic setting method and circuit of touch screen control integrated circuit driving signal

A technology for driving signals and integrated circuits, which is applied in electrical digital data processing, data processing input/output process, instruments, etc., can solve problems such as poor touch effect and insensitive response, and achieve the effect of expanding the selection range.

Inactive Publication Date: 2014-10-15
山东芯艺电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of various parasitic parameters, the dispersion of parameters during touch screen manufacturing, the non-uniformity of screen aging, and the randomness of electromagnetic interference in applications, the Vc(t) generated by the same drive signal is not the same, and then different touch screens are produced. Effect, many times the driving signal applied is not suitable for the cell, resulting in poor touch effect and insensitive response

Method used

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  • Dynamic setting method and circuit of touch screen control integrated circuit driving signal
  • Dynamic setting method and circuit of touch screen control integrated circuit driving signal
  • Dynamic setting method and circuit of touch screen control integrated circuit driving signal

Examples

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Embodiment Construction

[0025] A touch screen control integrated circuit drive signal dynamic setting circuit, such as image 3 As shown, the circuit is a mutual-capacitance touch screen control integrated circuit, including a driving signal generator P with built-in driving signals of different sizes, shapes and forms. The self-capacitance Cs and the mutual capacitance Cm of the cell are connected in series, and a control switch k1 and a parasitic resistance R are also connected in the series circuit, and another control switch k2 is connected in parallel to both ends of the self-capacitance Cs and the mutual capacitance Cm. When the control switch k1 is opened and the control switch k2 is closed, the two capacitors are discharged to release the charges in them; then, the control switch k1 is closed, the control switch k2 is opened, and the driving signal generator can be connected to the two capacitors to apply driving signals to them. The dynamic setting circuit further includes a test capacitor C...

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Abstract

The invention belongs to the technical field of a capacitive touch screen integrated circuit, and particularly relates to a dynamic setting method of a touch screen control integrated circuit driving signal and a dynamic setting circuit adopted by the method. The method comprises the following steps: utilizing a driving signal generator which pre-stores a plurality of driving signals to successively apply each driving signal to a cell to be tested; connecting a test capacitor from two ends of the capacitor in a cell to be tested of an original control integrated circuit in parallel; simulating a touch state and a touch-free state; measuring response signals corresponding to the two states, wherein the driving signal corresponding to a response signal value with maximum difference is an optimal driving signal of the cell to be tested; and successively linking all cells to select optimal driving signals for all cells. The optimal driving signals are dynamically selected for touch screen cells, and a touch screen is fully guaranteed to exhibit optimal touch effect all the time.

Description

technical field [0001] The invention belongs to the technical field of capacitive touch screen integrated circuits, and in particular relates to a dynamic setting method of a touch screen control integrated circuit driving signal and a dynamic setting circuit used in the method. Background technique [0002] The application of touch screens is becoming more and more popular, and a large number of touch screens are used in mobile phones, tablet computers (PADs), laptop computers, desktop computer displays, and vehicle display screens. Among them, the projected capacitive touch screen is more and more widely used because of its good light transmission, strong anti-interference ability, and support for multi-point touch. Projected capacitive touch screens are divided into two types: self-capacitive and mutual-capacitive. In the application of mutual-capacitive touch screens, the identification of the position and number of touch points is by first dividing the screen into sever...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
Inventor 董传友周艳
Owner 山东芯艺电子科技有限公司
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