Touch input device with shielding sheet and conductive layer that recognize precise stylus touch
AssigneeHiDeep Inc.
InventorsSeyeob Kim, Ho Jun Moon, Bonkee Kim
Life of this patent
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Abstract
A touch input device according to an embodiment of the present invention drives a stylus pen including a resonance circuit unit and senses a pen signal from the stylus pen, and comprises: a cover layer; a sensor unit which is arranged below the cover layer, and which includes at least one pattern for driving the stylus pen and sensing the pen signal; a display unit arranged below the sensor unit; and a shielding unit arranged below the display unit, wherein the shielding unit has a permeability and a thickness that allows the change rate of an inductance value of the resonance circuit unit to be −10% to +10% of a reference inductance value.
Claims8
A touch input device that drives a stylus pen comprising a resonance circuit unit and senses a pen signal from the stylus pen, the touch input device comprising:
- a cover layer;
- a display unit disposed below the cover layer;
- a single sensor unit disposed between the cover layer and the display unit, and comprising a pattern for sensing touch and at least one pattern for driving the stylus pen and sensing the pen signal;
- a shielding unit disposed below the display unit,
- wherein the shielding unit comprises a magnetic field shielding sheet disposed below the display unit and a conductive layer disposed below the magnetic field shielding sheet, and
- wherein the shielding unit has a permeability and a thickness, which allow a change rate of an inductance value of the resonant circuit unit to be −10% to +10% of a reference inductance value, and
- wherein an amount of increase in inductance value of the resonant circuit unit caused by the magnetic shielding sheet and an amount of decrease in inductance value of the resonant circuit unit caused by the conductive layer are equal to each other, or a sum of the amount of increase and the amount of decrease is −10% to +10% of the reference inductance value.
Dependencies are inferred from the claim text.