TOUCH SCREEN INTEGRATED DIGITIZER USING THREE DIMENSIONAL MAGNETISM SENSOR AND MAGNETIC PEN

摘要

Provided is a touch screen integrated digitizer including a three-axis magnetic force sensor and a magnetic pen, which measures a distribution and a change amount of a magnetic force vector, generated by moving the magnetic pen generating a magnetic force, to accurately sense a position of the magnetic pen which is moved on a touch screen. Since the digitizer for detecting position information of an external input unit is implemented with a magnetic force sensor installed at an internal edge of a display device, a separate digitizer panel is not provided, and thus, the display device is lightened and slimmed.

主权项

1. A touch screen integrated digitizer including a three-axis magnetic force sensor and a magnetic pen, the touch screen integrated digitizer comprising:
a display device; and a magnetic pen, wherein the display device comprises: a cover window configured to protect the display device from an external contact damage caused by a touch or writing; a touch panel disposed on a rear surface of the cover window to sense a touch contact signal; a liquid crystal panel disposed on a rear surface of the touch panel to output signal information; a circuit board configured to control an input or an output of a signal to or from the touch panel, the liquid crystal panel, and a magnetic force sensor; an internal case configured to surround a side surface and a rear surface of the circuit board and accommodate the cover window, the touch panel, and the liquid crystal panel which are sequentially stacked; and a magnetic force sensor provided as one or more on one of the rear surface of the cover window, a front surface and the rear surface of the liquid crystal panel, a front surface and the rear surface of the touch panel, a front surface and the rear surface of the circuit board, and an inner surface of the internal case, and the magnetic pen freely moves on the front surface of the cover window to generate a three-dimensional (3D) distribution of a magnetic force, the magnetic force sensor detects the 3D distribution of the magnetic force, and the display device visually displays a movement trajectory.