Abstract: The present invention relates to a communication method, device, and system. The communication method include using low-frequency alternating magnetic field signals to control a communication distance between a first radio frequency (RF) device and second RF device. The communication device receives and uses a first low-frequency alternating magnetic field signal transmitted from a second RF device to control the communication distance to the second RF device. The communication system includes a first RF device and a second RF device. The first RF device generates and transmits a first low-frequency alternating magnetic field signal and receives a second low-frequency alternating magnetic field signal, and the second RF device generates and transmits the second low-frequency alternating magnetic field signal and receives the first low-frequency alternating magnetic field signal.

Abstract: Provided are infrared interactive remote control devices and projection systems using same, which can distinguish an indication state and an interactive control state. A pattern disc rotatable around a rotating shaft is provided in the infrared interactive remote control device. In a normal state, a visible light source works independently, and indication pattern holes in the pattern disc are positioned on an optical path to allow visible light to pass through, so that indication light spots corresponding to the indication pattern holes are formed. When a control button is pressed down, the visible light source and an infrared light source work together, and the pattern disc is driven to rotate, so that the control pattern holes are positioned on the optical path to allow the visible light to pass through, and control light spots corresponding to the control pattern holes are formed to indicate an interactive control state.

Abstract: Embodiments of the present disclosure provide a headphone and an interaction system. The headphone includes: a controller electrically connected to the Type-C interface, a biological features detection module connected to the controller, a microphone electrically connected to the controller, and a loudspeaker electrically connected to the controller. The biological features detection module is configured to detect biological features of a user wearing the headphone; and the controller is configured to control paring between the Type-C interface and a terminal and communication between the terminal and the biological features detection module, the microphone and the loudspeaker when the headphone is in a digital mode, to control detection of biological features and processing of audio data.

Abstract: A power supply manageable wearable device includes: a power management module connected to the microphone interface, a control module and a function module that are connected to the power management module respectively; wherein the control module monitors whether a user instruction includes a voice communication instruction; if the user instruction includes the voice communication instruction, the power management module is enabled to supply power to a microphone and output a first voltage to supply power to the control module; or otherwise, the power management module is enabled to cut off power supply to the microphone and output a second voltage to supply power to the control module and the function module, or output a first voltage to supply power to the control module and output a second voltage to supply power to the function module. The wearable device has the advantages of convenient use and low cost.

Abstract: Embodiments of the present application provide a headphone with a biological feature detection function, an interaction system and a biological feature detection method. The headphone includes: a loudspeaker, a microphone, a biological feature detection module, a mode switching module, a first communication module, a control module and a power management module. The control module is configured to detect and determine whether an instruction is received from the smart terminal, and control, according to the instruction received from the smart terminal, the biological feature detection module, the mode switching module, the power management module and the first communication module to work, and further configured to parse the biological feature from the biological feature detection module under control of the instruction received from the smart terminal, and transmit the parsed biological feature to the smart terminal via the first communication module.

Abstract: The present invention relates to a communication method, device, and system. The communication method include using low-frequency alternating magnetic field signals to control a communication distance between a first radio frequency (RF) device and second RF device. The communication device receives and uses a first low-frequency alternating magnetic field signal transmitted from a second RF device to control the communication distance to the second RF device. The communication system includes a first RF device and a second RF device. The first RF device generates and transmits a first low-frequency alternating magnetic field signal and receives a second low-frequency alternating magnetic field signal, and the second RF device generates and transmits the second low-frequency alternating magnetic field signal and receives the first low-frequency alternating magnetic field signal.

Abstract: An auto-focusing projection system includes a projection module, an infrared monitoring module (300), an infrared source (400) provided on the projection module, and a focusing device for driving the first lens group (201) moving forward and backward. An IR light spot emitted from the infrared source falls within the monitoring scope of the infrared monitoring module, preferably inside the projected picture of the projection module or on the edge thereof, and after reflected back, it also can travel through the first lens group, and the splitting element in turn, and then be transmitted to the infrared monitoring module. Analyzing the IR light spot picture emitted from the infrared source which is collected by the infrared monitoring module, a control signal can be sent to a focusing motor to adjust the first lens group to an appropriate position, so as to realize auto-focusing.

Abstract: A projection system includes a projection module, an infrared monitoring module, and a focusing device. Lights of a projection light source (100) pass through a light splitting element (500) and a first lens group (201), and then emit out; infrared lights from outside pass through the first lens group (201) and the light splitting element (500) to an infrared monitoring module (300). Only the first lens group (201) can move back and forth and a focusing device is provided for driving the first lens group (201) to move back and forth. Optical characteristics of a projection objective (200) and a monitoring objective ensure that, during moving of the first lens group (201) driven by the focusing device, the projection objective (200) focuses clearly, and an infrared monitoring image received by an induction chip (301) meets monitoring requirements synchronously.

Abstract: The present invention relates to a communication method, device, and system. The communication method include using low-frequency alternating magnetic field signals to control a communication distance between a first radio frequency (RF) device and second RF device. The communication device receives and uses a first low-frequency alternating magnetic field signal transmitted from a second RF device to control the communication distance to the second RF device. The communication system includes a first RF device and a second RF device. The first RF device generates and transmits a first low-frequency alternating magnetic field signal and receives a second low-frequency alternating magnetic field signal, and the second RF device generates and transmits the second low-frequency alternating magnetic field signal and receives the first low-frequency alternating magnetic field signal.

Abstract: Provided are infrared interactive remote control devices and projection systems using same, which can distinguish an indication state and an interactive control state. A pattern disc rotatable around a rotating shaft is provided in the infrared interactive remote control device. In a normal state, a visible light source works independently, and indication pattern holes in the pattern disc are positioned on an optical path to allow visible light to pass through, so that indication light spots corresponding to the indication pattern holes are formed. When a control button is pressed down, the visible light source and an infrared light source work together, and the pattern disc is driven to rotate, so that the control pattern holes are positioned on the optical path to allow the visible light to pass through, and control light spots corresponding to the control pattern holes are formed to indicate an interactive control state.

Abstract: A projection system includes a projection module, an infrared monitoring module, and a focusing device. Lights of a projection light source (100) pass through a light splitting element (500) and a first lens group (201), and then emit out; infrared lights from outside pass through the first lens group (201) and the light splitting element (500) to an infrared monitoring module (300). Only the first lens group (201) can move back and forth and a focusing device is provided for driving the first lens group (201) to move back and forth. Optical characteristics of a projection objective (200) and a monitoring objective ensure that, during moving of the first lens group (201) driven by the focusing device, the projection objective (200) focuses clearly, and an infrared monitoring image received by an induction chip (301) meets monitoring requirements synchronously.

Abstract: An auto-focusing projection system includes a projection module, an infrared monitoring module (300), an infrared source (400) provided on the projection module, and a focusing device for driving the first lens group (201) moving forward and backward. An IR light spot emitted from the infrared source falls within the monitoring scope of the infrared monitoring module, preferably inside the projected picture of the projection module or on the edge thereof, and after reflected back, it also can travel through the first lens group, and the splitting element in turn, and then be transmitted to the infrared monitoring module. Analyzing the IR light spot picture emitted from the infrared source which is collected by the infrared monitoring module, a control signal can be sent to a focusing motor to adjust the first lens group to an appropriate position, so as to realize auto-focusing.

Abstract: The present invention relates to a communication method, device, and system. The communication method include using low-frequency alternating magnetic field signals to control a communication distance between a first radio frequency (RF) device and second RF device. The communication device receives and uses a first low-frequency alternating magnetic field signal transmitted from a second RF device to control the communication distance to the second RF device. The communication system includes a first RF device and a second RF device. The first RF device generates and transmits a first low-frequency alternating magnetic field signal and receives a second low-frequency alternating magnetic field signal, and the second RF device generates and transmits the second low-frequency alternating magnetic field signal and receives the first low-frequency alternating magnetic field signal.

Abstract: A method for padding, filtering, denoising, image enhancing and increased time-frequency acquisition is described for digitized data of a data set is described where unknown data is estimated using real data by adding unknown data points in a manner that the padding routine can estimate the interior data set including known and unknown data to a given accuracy on the known data points. The method also provides filtering using non-interpolating, well-tempered distributed approximating functional (NIDAF)-low-band-pass filters. The method also provides for symmetric and/or anti-symmetric extension of the data set so that the data set may be better refined and can be filtered by Fourier and other type of low frequency or harmonic filters.

Abstract: A method for padding, filtering, denoising, image enhancing and increased time-frequency acquisition is described for digitized data of a data set where unknown data is estimated using real data by adding unknown data points in a manner that the padding routine can estimate the interior data set including known and unknown data to a given accuracy on the known data points. The method also provides filtering using non-interpolating, well-tempered distributed approximating functional (NIDAF)-low-band-pass filters. The method also provides for symmetric and/or anti-symmetric extension of the data set so that the data set may be better refined and can be filtered by Fourier and other type of low frequency or harmonic filters.

Abstract: A method for padding, filtering, denoising, image enhancing and increased time-frequency acquisition is described for digitized data of a data set is described where unknown data is estimated using real data by adding unknown data points in a manner that the padding routine can estimate the interior data set including known and unknown data to a given accuracy on the known data points. The method also provides filtering using non-interpolating, well-tempered distributed approximating functional (NIDAF)-low-band-pass filters. The method also provides for symmetric and/or anti-symmetric extension of the data set so that the data set may be better refined and can be filtered by Fourier and other type of low frequency or harmonic filters.