Sensing device

A sensor device and technology of sensor device, applied in the direction of instrument, electrical digital data processing, input/output process of data processing, etc., can solve the problem of small signal-to-noise ratio, etc. consumption reduction effect

Inactive Publication Date: 2014-08-13
POSTECH ACAD IND FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the capacitive touch method of measuring mutual capacitance, the signal-to-noise ratio (SNR) of the common electrode (VCOM) noise generated by the flat panel display such as LCD or OLED itself is very small

Method used

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Embodiment Construction

[0053] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. Each component or feature is optional unless explicitly described. Each constituent component and feature may not be performed in combination with other constituent components or features. Further, some components and / or features may be combined to form embodiments of the present invention. The order of operations described in the embodiments of the present invention may be changed. Some components or features in one embodiment may be included in other embodiments or replaced by corresponding components or features in other embodiments.

[0054] In the description of the drawings, procedures or steps that obscure the technical spirit of the present invention are not described, and procedures or steps that are easily understood by those skilled in the art are also not described. Further, the same reference numerals are used for the same c...

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Abstract

The present invention is applicable to a sensing device such as a capacitive sensor or an inductive sensor and the like, which recognizes a user motion or an object motion and uses a high-frequency time periodic signal, compared to the user motion or object motion variation rate, as an input signal. The present invention relates to a sensing device for securing a sufficient signal-to-noise ratio (SNR) even though an input signal with relatively small amplitude is used by reducing an influence of the occurrence of noise, which is induced at a sensor element, on a final output signal of a sensor circuit receiving unit. According to the present invention, power consumption of a touch sensor chip is reduced by improving the SNR of a touch sensor circuit without increasing the amplitude of a touch sensor panel driving signal and touch sensor chip manufacturing costs are decreased by removing a high voltage driving circuit.

Description

technical field [0001] The present invention relates to a sensor circuit method that ensures a sufficient signal-to-noise ratio (SNR) by reducing the effect of noise introduced by the sensor device that appears in the final output signal of the receiving unit, although in a sensing device such as a capacitive sensor or an inductive sensor The amplitude of the input signal used is relatively small, and the frequency of the time period signal used as the input signal is relatively high compared with the change speed of the sensed user behavior or the motion of the object. More particularly, to illustrate embodiments of the present invention, the content of the present invention is applied to touch sensors used in flat panel displays such as liquid crystal displays (hereinafter referred to as "LCD") and organic light emitting diodes (hereinafter referred to as "LCD"). OLED"). The present invention sheds light on the use of input signals with relatively small amplitudes, but by r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044G09G3/20
CPCG09G3/20G06F3/0418G06F3/044G06F3/04182G06F3/0446G06F3/0412G09G3/3648
Inventor 朴鸿浚李祥铢吕东熹李宰承
Owner POSTECH ACAD IND FOUND
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