ebay smart board.Mobile device manufacturers want to provide consumers with a natural and easy-to-use user interface that is as easy to use as paper and pen, while also providing the flexibility of a computer that can help manufacturers differentiate their products. The small pointed passive stylus with palm malfunction detection allows manufacturers to offer low-cost solutions that support new application functions such as handwriting, editing, signature capture, and precision navigation. However, the implementation of these features also faces some challenges, and developers of passive stylus must meet a range of performance requirements for capacitive sensing technology on larger touch screens. Specifically, advanced algorithms and sensing methods are needed to detect small signals from the stylus, while eliminating the large unwanted signals caused by the user's palm. In addition, the device must be able to dynamically switch back and forth between the stylus and multi-touch input while maintaining a certain speed, accuracy and responsiveness to ensure an ideal user experience.