Abstract: A portable electronic device uses a miniaturization rechargeable capacitive stylus including a pen-shaped casing structure, a support structure, a circuit substrate, a sensor module, a pen head structure, an electrical connector structure, and a power supply component. The pen-shaped casing structure has a retaining convex portion. The electrical connector structure includes a carrier substrate positioned on the support structure and an electrical connector disposed on the carrier substrate, and the electrical connector has an electrical connection portion exposed from the pen-shaped casing structure. When the pen-shaped casing structure is inserted into a receiving space of the portable electronic device, the pen-shaped casing structure is positioned inside the receiving space of the portable electronic device by matching the retaining convex portion of the pen-shaped casing structure and a retaining concave portion that is disposed inside the receiving space of the portable electronic device.

Abstract: A rechargeable capacitive stylus includes a pen-shaped casing structure, a sensor module, a pen head structure, and an electrical connector structure. The pen-shaped casing structure has a pen casing, a rotatable ring rotatably disposed around the pen casing, and a pen holder adjacent to the rotatable ring. The sensor module is disposed inside the pen-shaped casing structure. The pen head structure is movably disposed inside the pen-shaped casing structure to selectively contact the sensor module. The electrical connector structure is disposed inside the pen-shaped casing structure. The electrical connector structure includes a first electrical connector electrically connected to a power supply, and the first electrical connector has a first electrical connection portion. The pen casing has a first fixed opening for exposing the first electrical connection portion, and the rotatable ring has a movable opening that is moved relative to the pen casing or the pen holder.

Abstract: An analog color video signal is inputted to a chip, which converts the analog signal into digital video signal. The digital color difference signals are then converted into three primary color format. Then a format detector detects the resolution and the scanning format. If the video signal is of interlaced scanning format, the detector unit removes the interlacing and converts the interlace into progressive format. The video signal is enhanced by a enhancing unit and adjusted to fit into the frame of the display screen.