Abstract: A location context managing method applied to an electronic device having at least one sensor, including: receiving positioning information from a plurality of positioning sources; receiving a value from the sensor; choosing a scenario from a scenario table based on the value received from the sensor and the positioning information received from the plurality of positioning sources, and calculating a location of the electronic device according to the scenario, wherein the scenario table lists a plurality of scenarios, each decides which positioning information from the plurality positioning sources to be adopted for the location calculation.

Abstract: A location context managing method applied to an electronic device having at least one sensor, including: receiving positioning information from a plurality of positioning sources; receiving a value from the sensor; choosing a scenario from a scenario table based on the value received from the sensor and the positioning information received from the plurality of positioning sources, and calculating a location of the electronic device according to the scenario, wherein the scenario table lists a plurality of scenarios, each decides which positioning information from the plurality positioning sources to be adopted for the location calculation.

Abstract: An RFID tag including a transmitting/receiving unit, a memory and a control unit. A first identification code, a second identification code, a password, and a set of data are stored in the memory. If the set of data is under protection, the set of data is accessible only when a verification procedure corresponding to the password is successfully performed. If the transmitting/receiving unit receives a request for accessing the second identification code, the control unit shall check whether the request includes the first identification code. As long as the checking result of the control unit is yes, even if the set of data is under protection and the verification procedure fails or the verification procedure is not successfully performed, the control unit shall still transmit the second identification code via the transmitting/receiving unit.

Abstract: An identification tag navigation system and a method thereof are provided according to the invention. The system comprises at least an identification tag and a mobile apparatus. The method comprises steps of receiving a destination reading command, accessing a destination information of the identification tag, receiving a plurality of reference signals and computing a current position data according to the plurality of reference signals, computing and generating a navigation route data according to the destination position data and the current position data, and generating an instruction data according to the navigation route data and the current position data.

Abstract: A near-field communication apparatus comprises an antenna, a signal processing circuit, a storage unit and a signal transmission interface. The antenna receives and transmits a wireless signal transmitted from and to a reader. The signal processing circuit, comprising a first port, a second port and a third port, generate a mapping data, wherein the first port is coupled to the antenna. The storage unit, coupled to the second port, comprises a predetermined memory area for storing the mapping data by the signal processing circuit. And the signal transmission interface, coupled or directly connected to the third port, for receiving an external signal and mapping the external signal to the mapping data by the signal processing circuit.

Abstract: An automatic lock and automatic unlock method for a computer system and the associated computer system are provided. The method includes steps of detecting whether a user is in a predetermined range when a computer system is in an unlock status and recording a duration during which the user is not in the predetermined range, controlling the computer system to enter a lock status when the duration is greater than a predetermined time, determining whether the user has an effective authority when the computer system is in the lock status and the user is detected in the predetermined range, and controlling the computer system to enter the unlock status when the user has the effective authority.

Abstract: A radio frequency (RF) charging system is capable of charging an RF device on a display panel to increase charging efficiency. The RF device generates a response signal upon receiving an RF signal. The RF charging system includes an antenna set having a plurality of antennas, a switch unit, an RF module and a microcontroller unit (MCU). The MCU controls the switch unit to select one antenna from the antenna set. The antenna is able to receive the response signal and is used for transmitting the RF signal, thereby charging the RF device.

Abstract: An identification system and method is disclosed to identify an identity and a position of a radio frequency (RF) device. The RF device generates a response signal when receiving an RF signal. The identification system includes a plurality of antenna units, a switching unit, an RF module and a microcontroller. Each antenna unit has a corresponding identifying area. The switching unit is coupled to the antenna units. The microcontroller controls the switching unit to select at least one antenna unit for transmitting the RF signal generated by the RF module, and determines whether the RF device positions in the corresponding identifying area of the select antenna unit according to whether the selected antenna unit receives the response signal. The microcontroller also identifies the identity of the RF device when the select antenna unit receives the response signal.

Abstract: A positioning navigation system using identification tags and a method thereof is provided. The system and method are applied to an area having a plurality of identification tags to position and navigate a mobile apparatus. The system includes a plurality of identification tags and a mobile apparatus. The method includes steps of accessing unique position data stored in at least one identification tag and generating position information of the mobile apparatus according to the unique position data stored in the at least one identification tag and a geographic data of the area. The unique position data of each identification tag corresponds to a coordinate position of the geographic data of each identification tag within the area.

Abstract: A radio frequency (RF) positioning system for positioning an RF device on a surface is provided. The RF positioning system utilizes the property of the RF device generating a response signal upon receiving an RF signal to perform positioning. The RF positioning system includes an antenna set, a switch unit, an RF module and micro-controller unit (MCU). The antenna set has a plurality of antennas in different sizes. The RF module is coupled to the switch unit. The MCU, coupled to the switch unit and the RF module, controls the switch unit to select one antenna from the antenna set and controls the RF module to generate the RF signal. The MCU further estimates a distance between the RF device and the RF positioning system according to whether the RF positioning system receives the response signal through the selected antenna.

Abstract: An identification tag information reminder system and a method thereof are provided. The system comprises an identification tag, for storing a tag identification code, an identification condition data and a reminder message corresponding to the identification condition data; and a portable device, comprising a memory, for storing a plurality of predetermined reminder conditions; an identification tag access module, for accessing the tag identification code, the identification condition data and the reminder message corresponding to the identification condition data of the identification tag; a processing module, for comparing the predetermined reminder condition with the tag identification code and the identification condition data to generate a comparison result; and an indicating module, for outputting the reminder message according to the comparison result.

Abstract: A near-field communication apparatus comprises an antenna, a signal processing circuit, a storage unit and a signal transmission interface. The antenna receives and transmits a wireless signal transmitted from and to a reader. The signal processing circuit, comprising a first port, a second port and a third port, generate a mapping data, wherein the first port is coupled to the antenna. The storage unit, coupled to the second port, comprises a predetermined memory area for storing the mapping data by the signal processing circuit. And the signal transmission interface, coupled or directly connected to the third port, for receiving an external signal and mapping the external signal to the mapping data by the signal processing circuit.

Abstract: A radio frequency (RF) charging system is capable of charging an RF device on a display panel to increase charging efficiency. The RF device generates a response signal upon receiving an RF signal. The RF charging system includes an antenna set having a plurality of antennas, a switch unit, an RF module and a microcontroller unit (MCU). The MCU controls the switch unit to select one antenna from the antenna set. The antenna is able to receive the response signal and is used for transmitting the RF signal, thereby charging the RF device.

Abstract: An automatic lock and automatic unlock method for a computer system and the associated computer system are provided. The method includes steps of detecting whether a user is in a predetermined range when a computer system is in an unlock status and recording a duration during which the user is not in the predetermined range, controlling the computer system to enter a lock status when the duration is greater than a predetermined time, determining whether the user has an effective authority when the computer system is in the lock status and the user is detected in the predetermined range, and controlling the computer system to enter the unlock status when the user has the effective authority.

Abstract: A positioning navigation system using identification tags and a method thereof is provided. The system and method are applied to an area having a plurality of identification tags to position and navigate a mobile apparatus. The system includes a plurality of identification tags and a mobile apparatus. The method includes steps of accessing unique position data stored in at least one identification tag and generating position information of the mobile apparatus according to the unique position data stored in the at least one identification tag and a geographic data of the area. The unique position data of each identification tag corresponds to a coordinate position of the geographic data of each identification tag within the area.

Abstract: An identification tag information reminder system and a method thereof are provided. The system comprises an identification tag, for storing a tag identification code, an identification condition data and a reminder message corresponding to the identification condition data; and a portable device, comprising a memory, for storing a plurality of predetermined reminder conditions; an identification tag access module, for accessing the tag identification code, the identification condition data and the reminder message corresponding to the identification condition data of the identification tag; a processing module, for comparing the predetermined reminder condition with the tag identification code and the identification condition data to generate a comparison result; and an indicating module, for outputting the reminder message according to the comparison result.

Abstract: An identification system and method is disclosed to identify an identity and a position of a radio frequency (RF) device. The RF device generates a response signal when receiving an RF signal. The identification system includes a plurality of antenna units, a switching unit, an RF module and a microcontroller. Each antenna unit has a corresponding identifying area. The switching unit is coupled to the antenna units. The microcontroller controls the switching unit to select at least one antenna unit for transmitting the RF signal generated by the RF module, and determines whether the RF device positions in the corresponding identifying area of the select antenna unit according to whether the selected antenna unit receives the response signal. The microcontroller also identifies the identity of the RF device when the select antenna unit receives the response signal.

Abstract: A radio frequency (RF) positioning system for positioning an RF device on a surface is provided. The RF positioning system utilizes the property of the RF device generating a response signal upon receiving an RF signal to perform positioning. The RF positioning system includes an antenna set, a switch unit, an RF module and micro-controller unit (MCU). The antenna set has a plurality of antennas in different sizes. The RF module is coupled to the switch unit. The MCU, coupled to the switch unit and the RF module, controls the switch unit to select one antenna from the antenna set and controls the RF module to generate the RF signal. The MCU further estimates a distance between the RF device and the RF positioning system according to whether the RF positioning system receives the response signal through the selected antenna.

Abstract: An identification tag navigation system and a method thereof are provided according to the invention. The system comprises at least an identification tag and a mobile apparatus. The method comprises steps of receiving a destination reading command, accessing a destination information of the identification tag, receiving a plurality of reference signals and computing a current position data according to the plurality of reference signals, computing and generating a navigation route data according to the destination position data and the current position data, and generating an instruction data according to the navigation route data and the current position data.

Abstract: An RFID tag including a transmitting/receiving unit, a memory and a control unit. A first identification code, a second identification code, a password, and a set of data are stored in the memory. If the set of data is under protection, the set of data is accessible only when a verification procedure corresponding to the password is successfully performed. If the transmitting/receiving unit receives a request for accessing the second identification code, the control unit shall check whether the request includes the first identification code. As long as the checking result of the control unit is yes, even if the set of data is under protection and the verification procedure fails or the verification procedure is not successfully performed, the control unit shall still transmit the second identification code via the transmitting/receiving unit.