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 |
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代理人 |
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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 |