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touch 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 the problems of misjudgment of touch points, increase of power consumption, and reduction of signal-to-noise ratio, and achieve the goal of reducing misjudgment Probability, the effect of accurate sensing

Inactive Publication Date: 2015-10-07
RAYDIUM SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will lead to a decrease in the signal-to-noise ratio and seriously affect the work of the touch control chip, and even lead to misjudgment of the touch point
[0005] Although some systems are equipped with filters for anti-noise, it also leads to a decrease in the data transmission return rate of these systems and an increase in power consumption

Method used

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Embodiment Construction

[0044] 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.

[0045] Such as image 3 As shown, the touch sensing device 1 at least includes a logic control module 10 , a pin 20 , a driving / sensing control module 30 , a processing module 40 , a contact pad 50 and an analog / digital conversion module 60 . Wherein, the logic control module 10 is respectively coupled to the driving / sensing control module 30, the processing module 40 and the analog / digital conversion module 60; the driving / sensing control module 30 is coupled to the pin 20 and the processing module 40; the pin 20 is coupled to The contact pad 50 ; the processing module 40 is coupled to the analog / digital conversion module 60 .

[0046]...

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PUM

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Abstract

A touch sensing apparatus carries out touch point sensing to a touch panel by a conductive film inductor, including a plurality of sensing lines and drive lines. The touch sensing apparatus comprises a plurality of sensing pads, a plurality of pins, a logical control module, a drive / sensing control module, a processing module and an analog / digital conversion module, wherein the sensing pads are respectively opposite to and coupled with the sensing lines. Extra capacitance load is arranged between every sensing pad and a grounding terminal. The pins ar respectively coupled with the sensing lines by the sensing pads to sensing a plurality of coupled capacitance values. The drive / sensing control module defines the pins as drive pins or sensing pins. The processing module converts the coupled capacitance values to a plurality voltage values. The analog / digital conversion module converts the voltage values to a plurality of digital data.

Description

technical field [0001] The present invention is related to liquid crystal displays; in particular, the present invention relates to a mutual-inductive capacitive touch sensing device by having an additional capacitive load between a sensing pad and a ground terminal The signal-noise ratio (Signal-Noise Ratio, SNR) of the whole system is improved, and the phenomenon that the data transmission reporting rate (reporting rate) of the whole system is reduced and the power consumption (power consumption) is increased can be effectively avoided. 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 of the important modules, and its performance directly affects the over...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
Inventor 董人宏詹前煜王建国左克扬
Owner RAYDIUM SEMICON