发明名称 Voltage difference-based capacitive touch detection device, capacitive touch detection method and capacitive touch screen panel, and display device with built-in capacitive touch screen panel
摘要 Provided is a new capacitive touch detection device, detection method, and touch screen panel for detecting a touch signal by detecting a voltage difference of a sensor pattern from a driving voltage applied by an auxiliary capacitor, and to a display device having a built-in capacitive touch screen. A capacitive touch detection device includes: a sensor pattern (10) forming a touch capacitance (Ct) in between a touch input device and the sensor pattern; an auxiliary capacitor (Caux) connected on one side to the sensor pattern (10) and having a driving voltage for touch detection applied to the other side thereof; a charging unit (12) for providing pre-charge signals to the touch capacitance (Ct) and the auxiliary capacitor (Caux); and a touch detection sensor (14) which is connected to the sensor pattern (10) and which detects a touch signal by detecting a voltage difference in the sensor pattern (10) when the touch capacitance (Ct) is added to the auxiliary capacitor (Caux) according to a touch of a touch input instrument. Effects of parasitic capacitance generated due to noise, coupling phenomena and other factors are minimized, to thus stably acquire touch signals.
申请公布号 US9507467(B2) 申请公布日期 2016.11.29
申请号 US201214003443 申请日期 2012.03.02
申请人 G2TOUCH CO., LTD. 发明人 Lee Sung Ho
分类号 G06F3/044;G06F3/041;G06F3/045;G06F3/01;G09G3/36 主分类号 G06F3/044
代理机构 代理人
主权项 1. A capacitive touch screen panel for detecting occurrence of a touch capacitance, the capacitive touch screen panel comprising: a substrate; at least one sensor pattern that is formed on top of the substrate, and forms the touch capacitance only by an approach of a finger or a touch input instrument to the sensor pattern; an auxiliary capacitor having one side that is connected to the sensor pattern and another side to which a driving voltage for detection of a touch input is applied; a charging unit that supplies a pre-charge signal to the sensor pattern and the auxiliary capacitor, to thus accumulate charges in the touch capacitance and the auxiliary capacitor; a touch detection sensor that is connected to the sensor pattern, and that detects a voltage difference that is a difference in a magnitude of a voltage generated in the sensor pattern by a driving voltage applied to the auxiliary capacitor when the touch capacitance is added at the time of occurrence of a touch input, in comparison with a magnitude of a voltage generated by a driving voltage applied to the auxiliary capacitor in the sensor pattern at the time of non-occurrence of a touch input, to thereby detect a touch signal; and a drive integrated circuit that controls the charging unit to supply a pre-charge signal to the touch capacitance and computes touch coordinates from an output of the touch detection sensor, wherein the touch detection sensor detects a voltage difference in the sensor pattern at a rising time and/or a falling time of the driving voltage that is applied to the auxiliary capacitor, and wherein the touch detection sensor detects a touch area of the finger or the touch input instrument with respect to the sensor pattern in response to the magnitude of the voltage difference.
地址 Seongnam KR