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A kind of drive circuit of touch panel and touch panel

A touch panel and driving circuit technology, applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., can solve the problems of increased power consumption and insufficient driving capability of integrated circuits, etc., and achieve reduced power consumption, reduced Effect of small voltage drop, reduced coupling capacitance and IC loading

Active Publication Date: 2018-02-16
XIAMEN TIANMA MICRO ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coupling capacitance generated between other conductive elements (such as pixel electrodes, other common electrodes, etc.) or other traces and the touch signal line 12 is relatively small, that is, the touch signal line 12 and other conductive traces 13 Or the coupling capacitance generated by the coupling of conductive elements is mainly with the display signal line. A large amount of coupling capacitance will make the driving capability of the integrated circuit (IC) insufficient and the power consumption will increase.

Method used

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  • A kind of drive circuit of touch panel and touch panel
  • A kind of drive circuit of touch panel and touch panel
  • A kind of drive circuit of touch panel and touch panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 of the present invention provides a driving circuit for a touch panel. image 3 It is a structural block diagram of the driving circuit of the touch panel provided by the first embodiment of the present invention.

[0031] Such as image 3 As shown, the driving circuit of the touch panel includes a signal selection circuit and a demultiplexing circuit;

[0032] The first input end of the signal selection circuit is connected to the touch signal input line transmitting the touch signal, the second input end of the signal selection circuit is connected to the display signal input line transmitting the display signal, and the signal selection circuit The output terminal is connected to the input terminal of the demultiplexing circuit;

[0033] The output terminals of the demultiplexing circuit are respectively connected to the electrodes of each sub-pixel through data lines;

[0034] In the display stage, the signal selection circuit sends the display signa...

Embodiment 2

[0043] Embodiment 2 of the present invention provides a driving circuit for a touch panel. The driving circuit of the touch panel uses switches to control the type of signals entering the data lines. Figure 5 It is a structural block diagram of the driving circuit of the touch panel provided by the second embodiment of the present invention.

[0044] Such as Figure 5 As shown, on the basis of the first embodiment, the driving circuit in this embodiment includes a signal selection circuit and a demultiplexing circuit, the signal selection circuit in this embodiment includes a first switch 41 and a second switch 42, and the first A switch 41 is used to control the cutoff or conduction between the first input terminal of the signal selection circuit and the display signal input line, and the second switch 42 is used to control the second input terminal of the signal selection circuit cut off or conduct with the touch signal input line. Specifically, in the display stage, the...

Embodiment 3

[0052] Embodiment 3 of the present invention provides a driving circuit for a touch panel. The driving circuit of the touch panel uses thin film transistors to control the type of signals entering the data lines 60 .

[0053] Figure 7 It is a circuit structure diagram of the demultiplexing circuit provided by Embodiment 3 of the present invention. Such as Figure 7 As shown, on the basis of Embodiment 1, the demultiplexing circuit described in this embodiment includes a third switch 43, a fourth switch 44 and a fifth switch 45, the control terminal G3 of the third switch 43, the input terminal S3 and the output terminal D3 are respectively connected to the first clock signal CKA, the data line 60 and the first sub-pixel electrode 51, and the control terminal G4, the input terminal S4 and the output terminal D4 of the fourth switch 44 are respectively connected to the second clock signal CKB, the data line 60 and the second sub-pixel electrode 52, the control terminal G5, t...

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PUM

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Abstract

A drive circuit of a touch panel includes a signal selection circuit and a de-multiplexing circuit, where in a display phase, the signal selection circuit is configured to forward a display signal to the de-multiplexing circuit, which is configured to de-multiplex the display signal and transmit signals resulting from the de-multiplexing of the display signal to the data lines; and in a touch phase, the signal selection circuit is configured to forward a touch driving signal to the de-multiplexing circuit, which is configured to de-multiplex the touch driving signal and transmit signals resulting from the de-multiplexing of the touch driving signal to the data lines, so that the pulse signals on the data lines are identical to the pulse signals on the touch driving signal lines and touch electrodes in the touch phase due to the signal selection circuit.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a driving circuit of a touch panel and the touch panel. Background technique [0002] The touch panel (Touch Panel, TP) includes an add-on touch panel (Add On Touch Panel) and a touch panel (InCell Touch Panel). The external touch screen is manufactured separately from the display panel and then assembled together. Such a production process will inevitably increase the thickness of the display screen, and due to the addition of several layers of transparent glass or film, the display light transmittance and contrast will also be obvious. Decrease, production cost will rise again. For the touch screen, TP is directly integrated into the display panel, which reduces the processing flow and saves some materials such as glass or film, so that the production cost is low, the light transmittance is good, and the thickness of the module is thin. Therefore, integrating the tou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
CPCG06F3/0412G06F3/04184G06F3/0443G06F3/0446G09G3/20G09G2300/0426G09G2310/0297G06F3/04164G06F3/044
Inventor 杨毅志
Owner XIAMEN TIANMA MICRO ELECTRONICS