Abstract: An electronic device includes: at least one connection interface, to receive an external signal. A first signal switching multiplexer is connected to the connection interface. A laptop system is connected to the first signal switching multiplexer, to operate in a laptop mode. A drawing board system is connected to the first signal switching multiplexer, to operate in a drawing board mode and an independent screen mode. A switching switch generates a switching signal and transmits it to the first signal switching multiplexer, the laptop system, and the drawing board system, to select the laptop mode, the drawing board mode, or the independent screen mode.

Abstract: A writing gesture notification method is provided. The writing gesture notification method, applied to an electronic device of an electronic system, the electronic system includes the electronic device and an input device, the writing gesture notification method comprising: obtaining input information from the input device; obtaining first contact information and orientation information of the input device from the input device; sensing second contact information via the electronic device; comparing the input information, the first contact information, the orientation information and the second contact information with preset information to generate a comparison result; and providing a notification via the electronic device according to the comparison result.

Abstract: An electronic system comprising an electronic device and an indicating device is provided. The indicating device includes a wireless communication circuit configured to be communicated with the electronic device, a switch circuit, a motion sensor for detecting a movement of the indicating device, and a control unit coupled to the wireless communication circuit, the motion sensor and the switch circuit. In a period that the switch circuit is triggered, the motion sensor detects a plurality of three-dimensional rotation matrices of the indicating device in the space. A movement trace of the indicating device is computed by the electronic device according to the three-dimensional rotation matrices, and a corresponding operating function is enabled according to the movement trace. An operating method and an indicating device is further provided.

Abstract: A stylus is provided. The stylus comprises a main body and a functional part. The main body includes a first processor, a trigger coupled to the first processor, and a connection interface coupled to the first processor. The functional part includes a functional module. The functional module is detachably coupled to the connection interface. When the functional part is coupled to the connection interface, the first processor determines a function of the functional module via the connection interface. The first processor enables the functional module when the trigger is triggered. An operating method for a stylus is also provided.

Abstract: A writing gesture notification method is provided. The writing gesture notification method, applied to an electronic device of an electronic system, the electronic system includes the electronic device and an input device, the writing gesture notification method comprising: obtaining input information from the input device; obtaining first contact information and orientation information of the input device from the input device; sensing second contact information via the electronic device; comparing the input information, the first contact information, the orientation information and the second contact information with preset information to generate a comparison result; and providing a notification via the electronic device according to the comparison result.

Abstract: A stylus is provided. The stylus comprises a main body and a functional part. The main body includes a first processor, a trigger coupled to the first processor, and a connection interface coupled to the first processor. The functional part includes a functional module. The functional module is detachably coupled to the connection interface. When the functional part is coupled to the connection interface, the first processor determines a function of the functional module via the connection interface. The first processor enables the functional module when the trigger is triggered. An operating method for a stylus is also provided.

Abstract: An electronic system comprising an electronic device and an indicating device is provided. The indicating device includes a wireless communication circuit configured to be communicated with the electronic device, a switch circuit, a motion sensor for detecting a movement of the indicating device, and a control unit coupled to the wireless communication circuit, the motion sensor and the switch circuit. In a period that the switch circuit is triggered, the motion sensor detects a plurality of three-dimensional rotation matrices of the indicating device in the space. A movement trace of the indicating device is computed by the electronic device according to the three-dimensional rotation matrices, and a corresponding operating function is enabled according to the movement trace. An operating method and an indicating device is further provided.