Touch sensing system and method for driving the same
AssigneeLG Display Co., Ltd.
InventorsDONGJO PARK, SOJUNG JUNG
Life of this patent
Estimating the term…
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.
Claims18
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.
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:
- 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.
A user interface comprising:
- 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.
Dependencies are inferred from the claim text.