APPARATUS FOR SENSING CHARGE OF MULTI TOUCH PANEL

PURPOSE: A device for sensing charge amount of a multi-touch panel is provided to accumulate the charge amount without amplification corresponding to a multi-touch state of the multi-touch panel and to reduce noise by a noise standardization role, thereby minimizing the noise. CONSTITUTION: A signal...

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Bibliographische Detailangaben
Hauptverfasser:	KIM, BUM SOO, YOU, JAE WOO, KIM, KYUNG HWAN, WOO, MIN SEOK
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CALCULATING CODE CONVERSION IN GENERAL CODING COMPUTING COUNTING DECODING ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY PHYSICS
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Beschreibung
Zusammenfassung:	PURPOSE: A device for sensing charge amount of a multi-touch panel is provided to accumulate the charge amount without amplification corresponding to a multi-touch state of the multi-touch panel and to reduce noise by a noise standardization role, thereby minimizing the noise. CONSTITUTION: A signal transmitting unit(110) outputs a sensing signal in response to an input selection signal. A capacitance sensor(120) outputs charge amount corresponding to a touch state of a multi-touch panel in response to the sensing signal. A signal receiving unit(130) accumulates the charge amount and removes noise by controlling gains. A multiplexer(145) successively selects and outputs voltages which are outputted from the signal receiving unit in response to a voltage selection signal. An ADC(Analog to Digital Converter)(140) converts the voltages into a digital signal. [Reference numerals] (110) Signal transmitting unit; (131_1,131_k) Sampling unit; (133_1,133_k) Charge accumulation unit; (135) Gain control unit