TOUCH SENSING SYSTEM AND METHOD FOR DRIVING THE SAME
First Claim
1. A touch sensing system comprising:
- a pen including at least one resonant circuit embedded therein;
XY electrodes including X electrodes and Y electrodes perpendicular to the X electrodes;
an antenna that surrounds the XY electrodes; and
a first touch driving circuit configured to supply a resonant inductive signal to the XY electrodes, decide a location of the pen based on a resonance magnitude of a resonance signal received through the antenna, and decide a pen pressure of the pen based on a resonant frequency of the resonant circuit and an adjacent frequency of the resonant frequency measured while varying a frequency of the resonant inductive signal.
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Accused Products
Abstract
A touch sensing system includes a pen including at least one resonant circuit embedded therein, XY electrodes including X electrodes and Y electrodes perpendicular to the X electrodes, an antenna surrounding the XY electrodes, and a first touch driving circuit which supplies a resonant inductive signal to the XY electrodes, decides a location of the pen based on a resonance magnitude of a resonance signal received through the antenna, and decides a pen pressure of the pen based on a resonant frequency of the resonant circuit and an adjacent frequency of the resonant frequency measured while varying a frequency of the resonant inductive signal.
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Citations
18 Claims
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1. A touch sensing system comprising:
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a pen including at least one resonant circuit embedded therein; XY electrodes including X electrodes and Y electrodes perpendicular to the X electrodes; an antenna that surrounds the XY electrodes; and a first touch driving circuit configured to supply a resonant inductive signal to the XY electrodes, decide a location of the pen based on a resonance magnitude of a resonance signal received through the antenna, and decide a pen pressure of the pen based on a resonant frequency of the resonant circuit and an adjacent frequency of the resonant frequency measured while varying a frequency of the resonant inductive signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for driving a touch sensing system including a pen including at least one resonant circuit embedded therein, XY electrodes including X electrodes and Y electrodes perpendicular to the X electrodes, and an antenna surrounding the XY electrodes, the method comprising:
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deciding a location of the pen based on a resonance magnitude of a resonance signal received through the antenna; and deciding a pen pressure of the pen based on a resonant frequency of the resonant circuit and an adjacent frequency of the resonant frequency measured while varying a frequency of a resonant inductive signal. - View Dependent Claims (16, 17)
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18. A user interface comprising:
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a display; a touch sensing system comprising; a pen including a resonant circuit embedded therein; XY electrodes including X electrodes and Y electrodes perpendicular to the X electrodes; an antenna that surrounds the XY electrodes; and a first touch driving circuit configured to supply a resonant inductive signal to the XY electrodes, decide a location of the pen based on a resonance magnitude of a resonance signal received through the antenna, and decide a pen pressure of the pen based on a resonant frequency of the resonant circuit and an adjacent frequency of the resonant frequency measured while varying a frequency of the resonant inductive signal; a processor and memory configured to analyze a received signal of the antenna to estimate a location and a pen pressure of the pen on the display.
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Specification