touch support with 10 touch points stylus

When delivering NULL data, the device simply needs to set values that are outside the specified logical range for X and Y. The report descriptor below shows how NULL values can be supported for X and Y. Since most devices that are able to detect the pen at a higher vertical distance won’t be able to accurately detect the coordinates of the pen, NULL coordinates should be reported by the device. This will allow the host to handle touch input differently when it’s aware that the pen is in range. It is highly recommended that this distance be 50 mm (or as close to this as possible), as this produces a better user experience. To facilitate palm rejection, the pen device should report data at a vertical distance higher than it normally would. If your digitizer might be installed on a slate, tablet PC or other computer that has no mouse, you should also report a mouse collection. If your device includes a digitizer that provides both touch and pen functionality, you must report touch and pen collections separately.

Touch support with 10 touch points stylus