Touch control sensing device

A technology of touch sensing and sensing lines, which is applied in the field of mutual-inductance capacitive touch sensing devices, can solve problems such as misjudgment of touch points, reduction of signal-to-noise ratio, and influence on the operation of touch control chips, so as to reduce The probability of misjudgment and the effect of expanding the application range

Active Publication Date: 2013-01-02
RAYDIUM SEMICON
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  • Abstract
  • Description
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Problems solved by technology

This will reduce the signal-to-noise ratio and seriously affect the operation of the touch control chip, and even lead to misjudgment of touch points

Method used

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Embodiment Construction

[0051] A specific embodiment according to the present invention is a touch sensing device. In this embodiment, the touch sensing device may be a mutual capacitive touch sensing device, but not limited thereto. Please refer to image 3 , image 3 is a functional block diagram illustrating the touch sensing device of the present invention. Such as image 3 As shown, the touch sensing device 1 at least includes a logic control module 10 , pins 20 , a driving / sensing control module 30 , a noise suppression module 40 and an analog / digital conversion module 60 . Wherein, the logic control module 10 is respectively coupled to the driving / sensing control module 30, the noise suppression module 40 and the analog / digital conversion module 60; the driving / sensing control module 30 is coupled to the pin 20 and the noise suppression module 40; the noise suppression module 40 is coupled to an analog / digital conversion module 60 .

[0052] Please refer to Figure 4 , Figure 4 draw ...

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Abstract

The invention provides a touch control sensing device including a plurality of pins, a logic control module, a drivesensing control module, a noise suppressing module and an analogdigital converting module. The drivesensing control module defines a drive pin and a sensing pin of the pins according to signals of the drivesensing control module. The drive pin and the sensing pin are coupled to a drive line and a sensing line of a conducting film sensor respectively. The noise suppressing module is composed of an exchange capacitance amplifier and is used for detecting the coupling capacitance among different nodes between the drive line and the sensing line according to noise suppressing control signals, and excluding the capacitance between the drive line and a grounding terminal as well as the sensing line and the grounding terminal. The analogdigital converting module converts analog data processed by the noise suppressing module into digital data and outputs the digital data to the logic control module.

Description

technical field [0001] The present invention is related to liquid crystal displays; specifically, the present invention relates to a mutual-inductance capacitive touch sensing device, which can detect the nodes of the driving line and the sensing line by using the noise suppression module composed of the switching capacitor amplifier technology The coupling capacitance between them, and the capacitance between the driving line and the ground terminal and the capacitance between the sensing line and the ground terminal are eliminated, so as to effectively reduce the interference of noise on the touch sensing. Background technique [0002] With the rapid development of technology, thin film transistor liquid crystal displays (TFT LCDs) have gradually replaced traditional displays, and have been widely used in various electronic products such as TVs, flat panel displays, mobile phones, tablet computers, and projectors. For a TFT-LCD with touch function, the touch sensor is one ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044G02F1/133
Inventor 董人宏王建国詹前煜左克扬
Owner RAYDIUM SEMICON
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