Active touch pen

An active touch pen, used for manipulating a touch display device, the active touch pen comprising:

• a pen barrel;
• a pen head, connected to the pen barrel;
• a pen shaft, disposed in the pen barrel and connected to the pen head;
• a sleeve, disposed in the pen barrel, and the pen shaft penetrating through the sleeve, wherein the sleeve has an inner surface surrounding the pen shaft and a bottom surface facing the pen head, and the inner surface of the sleeve has a first pattern and a second pattern adjacent to the first pattern;
• a processor, connected to the pen shaft;
• a sensor, connected to the pen shaft and aligned with the first pattern, and electrically connected to the processor, the sensor being configured to detect variation of the first pattern during the sleeve rotating relative to the pen barrel so as to obtain a first sensing data, and transmits the first sensing data to the processor;
• a wireless transmission assembly, connected to the pen shaft, and electrically connected to the processor, the processor calculating rotation amount of the sleeve according to the first sensing data and transmitting the rotation amount to the touch display device through the wireless transmission assembly to perform toning;
• and
• a switch, electrically connected to the processor, wherein the switch is connected to the pen shaft and is located between a top portion of the sleeve and the pen shaft, after the sleeve moves toward the pen head relative to the pen barrel, and the switch is thus triggered by the top portion of the sleeve, the sensor is aligned with the second pattern, and the processor controls the sensor to detect the variation of the second pattern during the pen shaft moving along with the pen head relative to the pen barrel so as to obtain the second sensing data, the processor calculates a pressure value when the pen head is pressed according to the second sensing data, and transmits the pressure value to the touch display device through the wireless transmission assembly to adjust thickness of lines.
• lay device through the wireless transmission assembly to adjust thickness of lines.