There are a lot of rumors about the Galaxy Z Fold 3, and one of the most important rumors about this phone is the stylus support. Today, Letsgodigital published images of a patent filed by Samsung with the World Intellectual Property Organization a few months ago. In these pictures, the Galaxy Z Fold 3 with a stylus can be seen on the lower-right edge; Something like the S Pen on the Galaxy Note 20.
Most likely, Samsung wants to use AES technology for this, which requires only one sensor for the pen and where it touches; This feature will be suitable for Z Fold 3 folding screen. The HP stylus uses the EMR feature, so it does not require an external power source.