Patent 10955964 was granted and assigned to LG on March, 2021 by the United States Patent and Trademark Office.
A touchscreen display device includes a display panel, a touch sensor, and a touch circuit. The touch sensor is disposed in an area corresponding to the display panel to output an uplink signal including signal intensity information regarding an intensity of a downlink signal output from an active pen. The touch circuit controls the touch sensor to output the uplink signal.