Capacitive touch sensor
First Claim
1. A capacitive touch sensor which includes a flat panel display for displaying an image and a touch sensor panel positioned on the flat panel display or embedded in the flat panel display, the capacitive touch sensor comprising:
- a driving clock generator configured to generate a plurality of time-periodic output signals, and apply the time-periodic output signals of the driving clock generator to the touch sensor panel and a receiver circuit unit;
a driver configured to generate a driving signal of the touch sensor panel using a part of the time-periodic output signals of the driving clock generator; and
the receiver circuit unit configured to process noise contained in a signal received from the touch sensor panel, using the time-periodic output signals,wherein one or more of the time-periodic output signals of the driving clock generator have a period corresponding to an even multiple of a period of self-generated noise of the flat panel display.
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Accused Products
Abstract
Provided is a capacitive touch sensor which includes a flat panel display for displaying an image and a touch sensor panel positioned on the flat panel display or embedded in the flat panel display. The capacitive touch sensor may include: a driving clock generator configured to generate a plurality of time-periodic output signals by using a gate driver signal of the flat panel display, and apply the generated time-periodic output signals to the touch sensor panel and a receiver circuit unit; a driver configured to generate a driving signal of the touch sensor panel using a part of the output signals of the driving clock generator; and the receiver circuit unit configured to process noise contained in a signal received from the touch sensor panel, using the output signals.
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Citations
30 Claims
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1. A capacitive touch sensor which includes a flat panel display for displaying an image and a touch sensor panel positioned on the flat panel display or embedded in the flat panel display, the capacitive touch sensor comprising:
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a driving clock generator configured to generate a plurality of time-periodic output signals, and apply the time-periodic output signals of the driving clock generator to the touch sensor panel and a receiver circuit unit; a driver configured to generate a driving signal of the touch sensor panel using a part of the time-periodic output signals of the driving clock generator; and the receiver circuit unit configured to process noise contained in a signal received from the touch sensor panel, using the time-periodic output signals, wherein one or more of the time-periodic output signals of the driving clock generator have a period corresponding to an even multiple of a period of self-generated noise of the flat panel display. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19, 21, 22, 25, 26, 27, 28, 29, 30)
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2. A capacitive touch sensor comprising:
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a flat panel display; a touch sensor panel coupled to the flat panel display; a driving clock generator configured to generate a plurality of time-periodic output signals, using a clock signal for driving a gate of the flat panel display; a driver configured to drive the touch sensor panel using a part of the time-periodic output signals of the driving clock generator; and a receiver circuit unit configured to receive a signal from the touch sensor panel and reduce noise, wherein one or more of the time-periodic output signals of the driving clock generator have a period corresponding to an even multiple of a period of self-generated noise of the flat panel display. - View Dependent Claims (13, 14)
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15. A capacitive touch sensor comprising:
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a flat panel display; a touch sensor panel coupled to the flat panel display; a driving clock generator configured to generate a plurality of time-periodic output signals using a clock signal for driving a gate of the flat panel display; a driver configured to drive the touch sensor panel using a part of the time-periodic output signals of the driving clock generator; a receiver circuit unit configured to receive a signal from the touch sensor panel and reduce an influence of common electrode noise of the flat panel display; and an AC coupling circuit configured to transmit the waveform of the common electrode noise to the receiver circuit unit, wherein one or more of the time-periodic output signals of the driving clock generator have a period corresponding to an even multiple of a period of self-generated noise of the flat panel display. - View Dependent Claims (17, 18, 20)
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16. A capacitive touch sensor which includes a flat panel display for displaying an image and a touch sensor panel provided on or in the flat panel display, the capacitive touch sensor comprising:
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a driving clock generator configured to generate a plurality of time-periodic output signals using a clock signal for driving a gate of the flat panel display; a driver having multiple output terminals of which each is electrically coupled one-to-one to one of Y electrodes of the touch sensor panel; and a receiver circuit unit having multiple input terminals of which each is electrically coupled one-to-one to one of X electrodes of the touch sensor panel, wherein each of the multiple input terminals of the receiver circuit unit is electrically coupled one-to-one to an inverting input terminal of a charge amplifier existing in the receiver circuit unit, wherein mutual capacitance is formed between an i-th Y electrode and a j-th X electrode of the touch sensor panel, and wherein one or more of the time-periodic output signals of the driving clock generator have a period corresponding to an even multiple of a period of self-generated noise of the flat panel display.
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23. A capacitive touch sensor which drives a touch sensor panel coupled to a flat panel display, the capacitive touch sensor comprising:
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a driving clock generator configured to generate a plurality of time-periodic output signals using a clock signal for driving a gate of the flat panel display; a driver configured to drive the touch sensor panel using a part of the time-periodic output signals of the driving clock generator; a receiver circuit unit configured to receive a signal from the touch sensor panel and reduce an influence of common electrode noise of the flat panel display; and an analog-to-digital converter (ADC) configured to receive an output signal of the receiver circuit unit, wherein the driving clock generator, the driver, the receiver circuit unit, and the ADC are included in one integrated circuit chip, and wherein one or more of the time-periodic output signals of the driving clock generator have a period corresponding to an even multiple of a period of self-generated noise of the flat panel display. - View Dependent Claims (24)
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Specification