Abstract: A radio frequency identification integrated circuit for reducing pin counts and an RFID providing method thereof are provided in the present invention. The radio frequency identification integrated circuit includes a first IO pin, a second IO pin and a third IO pin. The method includes determining whether the coil is coupled to the first IO pin, the second IO pin and the third IO pin when the RFID IC is enabled; and determining the identification according to the voltage status of the non-coupled pin and the pins coupled to the coil.

Abstract: A decoder for a wireless charging transmitter and a wireless charging transmitter using the same are provided in the present invention. In order to adapt the wide range of the received signal from the wireless charging receiver, which usually results in the error of the decode, the feedback circuit of the wireless charging transmitter is changed, so that the signal in a certain swing is amplified by an original gain, and the signal out of the certain swing is amplified by a limited gain. Therefore, the amplified signal is able to show the characteristic of the original received signal. Thus, the accuracy of decoding is increased.

Abstract: A dual decoder for a wireless charging receiver and a wireless charging receiver using the same are provided. The wireless charging receiver includes a resonant circuit, a rectifier circuit and a dual decoder for the wireless charging receiver. The rectifier circuit coupled to the resonant circuit converts wireless energy received by the resonant circuit into a direct current. The dual decoder includes a frequency decoding circuit and a voltage amplitude decoding circuit. The frequency decoding circuit performs decoding according to a frequency of a voltage of the resonant circuit to obtain an instruction of a wireless transmitter. The voltage amplitude decoding circuit extracts a carrier on the voltage of the resonant circuit through a filter, and decodes the carrier into the instruction of the wireless transmitter. With the complementary of two-way decoding, the communication system becomes robuster.

Abstract: An interactive music tag system and an interactive method thereof are provided in the present invention. The interactive method is adapted for an interactive music tag and an interactive music tag reader. The method includes: when the interactive music tag is close to the interactive music tag reader, outputting an wireless energy to the interactive music tag and outputting an audio envelop signal to the coil of an LC resonant circuit such that the analog audio signal is transmitted to the interactive music tag; when the interactive music tag reader controls the interactive music tag, modulating a control signal into the wireless energy; when the interactive music tag receives the control signal through the LC resonant circuit, controlling the output status of the audio envelop signal according to the control signal.

Abstract: A receiver circuit with low power consumption and a method for reducing power consumption of a receiver system are provided. The method for reducing power consumption of the receiver system comprises steps of: providing a signal receiver module; intermittently enabling/disabling the signal receiver module when a microprocessor is in a sleep mode; detecting whether the signal receiver module receives a signal when the signal receiver module is enabled; and waking the microprocessor up to decode the received signal if the signal receiver module receives the signal.

Abstract: An integrated communication and capacitive sensing circuit and an interactive system using the same are provided in the present invention. The integrated communication and capacitive sensing circuit includes a microprocessor, a sensing electrode and a resonant circuit. The microprocessor includes a first input/output (I/O) pin and a second I/O pin. The sensing electrode is coupled to the first I/O pin of the microprocessor. The input terminal of the resonant circuit is coupled to the second I/O pin of the microprocessor, and the output terminal of the resonant circuit is coupled to the sensing electrode. When sensing the capacitance is performed, the first I/O pin of the microprocessor detects the charging/discharging state of the sensing electrode to determine the capacitive variation.

Abstract: A touch-control communication system and a touch control communication method are provided in the present invention. The system includes a mobile device and a data transmission device. The mobile device has a capacitive touch panel, and the capacitive touch panel emits a touch sensing signal when the capacitive touch panel senses touch. The data transmission device is configured with a transceiver antenna and a signal inverting circuit. According to the transmission data, the data transmission device determines whether or not the signal inverting circuit outputs an inversion signal to the transceiver antenna, so that the capacitive touch panel obtains a logic state of the transmission data by detecting whether or not a touch point exists. Thus, the transmission data can be transmitted to the mobile device.

Abstract: Distance detection method and device are provided. The distance detection method comprises: providing a directional signal emitting module; providing a directional signal receiving module having a constant bandwidth; providing a distance detection signal to the directional signal emitting module; changing a frequency of the distance detection signal provided to the directional signal emitting module, and judging whether the directional signal receiving module can decode a reflected directional signal into a received signal; and judging a distance between an external object and the directional signal receiving module according to whether the received signal corresponding to the frequency of the distance detection signal can be decoded.

Abstract: A low cost position sensor and a mobility device using the same are provided. The low cost position sensor comprises a rollable object, a container and a control circuit. The rollable object comprises a specific material. The container has a non-planar inner bottom portion. At least one sensor for detecting coordinates is disposed inside the container. The rollable object is disposed in the container. The sensor can detect the specific material. The control circuit is coupled to the sensor. The sensor detects the specific material to determine a coordinate position of the rollable object, and sends the coordinate position of the rollable object back to the control circuit. The control circuit determines a tilt angle of the container according to the coordinate position of the rollable object.

Abstract: An automatic page detection method for a print article and a print article using the same are provided in the present invention. The automatic page detection method for the print article includes the steps of: disposing N receiving units at N first preset position of a cover of the print article; disposing a transmitting unit at the second preset position of the cover of the print article; disposing N thin conductors respectively at N pages, wherein the a thin conductor is disposed between Kth first preset position of the Kth page and the second preset position of the Kth page; emitting a detection signal by the transmitter; and determining the present page according to the receiving unit(s) of the N receiving units which receive(s) the detection signal.

Abstract: A device with both functions of wireless power transmitter and wireless power receiver and a circuit thereof are provided in the present invention. The device with both functions of wireless power transmitter and wireless power receiver and the circuit thereof use the same winding for performing the energy output and the energy receiving function. In addition, in order to use the same winding for performing the energy output and the energy receiving function, the present invention adopts full bridge topology. However, two lower switches are controlled by the resonant circuit when the device is in the energy receiving mode. The upper switches are not only for receiving the power voltage, but also for rectifying the energy received from the winding to output to the device with both functions of wireless power transmitter and wireless power receiver.

Abstract: An interactive amusement system, interactive wearing system and a data transmission circuit for biological contact are provided in the present invention. The interactive wearing system includes a first wearing device and a second wearing device. The first and the second wearing devices are includes a contact conductor for respectively contacting with the users. When a first user wears the first wearing device and a second user wears the second wearing device, and the first user touches the second user, a secret message that has been set into the first wearing device by the first user is transmitted to the second wearing device.

Abstract: A light emitting device with a dimming visible light communication function and an interaction device applying for visible light are provided. The light emitting device with the dimming visible light communication function comprises a luminance adjusting unit, a control circuit and a light emitting device. The luminance adjusting unit outputs a luminance adjusting signal according to luminance adjusted by a user. The control circuit coupled to the luminance adjusting unit outputs a pulse width modulation (PWM) signal according to the luminance adjusting signal. The light emitting device outputs visible light, receives the PWM signal, and is turned on or off according to states of a logic high voltage and a logic low voltage of the PWM signal. In an idle mode, the PWM signal operates at a first frequency. In a light communication mode, an operating frequency of the PWM signal is changed according to transmitted data.

Abstract: An infrared circuit for a single battery and a remote controller using the same are provided. The single battery outputs a battery voltage. The infrared circuit comprises an IR LED circuit, an inductor and a microcontroller. The IR LED circuit is coupled between the battery voltage and a common voltage. The inductor is coupled between the battery voltage and the common voltage. The microcontroller has an I/O port coupled to the inductor and the IR LED circuit. When infrared rays are emitted, the microcontroller controls the battery voltage to charge the inductor through the I/O port, and a continuous current of the inductor forces the IR LED circuit to turn on.

Abstract: A system for identifying ID (identity) and an ID card using the same are provided in the present invention. The ID card includes a card case, a first conducting electrode and a plurality of second conducting electrodes. The first conducting electrode and the second conducting electrodes are disposed in the card case. At least a specific second conducting electrode is electrically connected to the first conducting electrode to represent a specific ID. A card reader for reading the ID card includes a transmitting unit, a plurality of receiving units and a control circuit. The transmitting unit is disposed at the position corresponding to the first conducting electrode, and the receiving units are disposed at the position corresponding to the second conducting electrodes when the ID card is disposed on the card reader. The control circuit is coupled to the transmitting unit and the receiving units. When the ID card is close to the card reader, the transmitting unit transmits a wireless signal.

Abstract: An interactive method for communication with a smart mobile device and an interactive communication system using the same are provided. The interactive communication system comprises an external device and a smart mobile device. The external device comprises a microprocessor circuit and an AC magnetic emitter. The microprocessor circuit is for encoding specific data into an encoded signal. The AC magnetic emitter is for converting the encoded signal into an AC magnetic signal. The smart mobile device comprises an E-compass sensor. In addition, the smart mobile device stores a specific application program for acquiring a magnetic variation of the E-compass sensor. When the magnetic variation of the E-compass sensor is greater than a threshold variation, the AC magnetic signal is decoded through the specific application program to obtain the specific data.

Abstract: A wireless charging circuit for power bank and a power bank thereof are provided in the present invention. The wireless charging circuit includes a boost DC to DC converter, a unidirectional conductive element and a wireless power converter. The input terminal of the boost DC to DC converter is coupled to the battery to receive the battery voltage. The output terminal of the boost DC to DC converter outputs a converted DC voltage. The first terminal of the unidirectional conductive element is coupled to the battery to receive the battery voltage. The input terminal of the wireless power converter is coupled to the second terminal of the unidirectional conductive element. When the wireless charging circuit performs the detection for the wireless power receiver, the wireless power converter disables the boost DC to DC converter.

Abstract: A method for unlocking a door, a method for renting asset and a system thereof are provided in the present invention. The door includes an audio receiver, and the method includes the steps of: storing a unlock sequence into a mobile device; performing a audio modulation to generates a audio modulation voiceprint signal, wherein the frequency range of the audio modulation voiceprint signal is in the audio frequency; playing the audio modulation voiceprint signal by using the speaker of the mobile device; when the audio receiver receives the audio modulation voiceprint signal, the method further includes: performing a audio demodulation to obtain the unlock sequence; and determining whether the door is unlock or not according to the unlock sequence.

Abstract: An apparatus with both touch sensing and electrical field sensing functions and an interactive apparatus using the same are provided. The apparatus with both touch sensing and electrical field sensing functions comprises a control circuit, a first capacitive sensing electrode and a second capacitive sensing electrode. The first capacitive sensing electrode is coupled to a first sensing control terminal of the control circuit. The second capacitive sensing electrode is coupled to a second sensing control terminal of the control circuit. In a first period, the first capacitive sensing electrode is charged to a first voltage through the first sensing control terminal, and the second sensing control terminal supplies an electrical field pulse to the second capacitive sensing electrode such that the second capacitive sensing electrode outputs an electrical field pulse signal.

Abstract: A circuit for signal decoding in RFID or wireless power charging is provided in the present invention. The implement of the present invention is to add a current sense resistor connected to an upper switch or a lower switch the up arm switch or low arm switch to decode the signal on the current sense resistor. Since the error would occur in the original voltage decoder of the wireless power or RFID when the load is heavy and voltage signal swing is large, such that the charge status and then the off-line status cyclically occur and then the charge status . . . occurs in cycle when the mobile device is charging under charge. Since the present invention uses the voltage and current for decoding at the same time, the decoding would be succeed whenever the load is light or heavy.