Abstract:
A direct current voltage conversion device includes a buck converter receiving a direct current input voltage and outputting a direct current first voltage according to a first control signal, a series resonant converter outputting an alternating current second voltage according to a second control signal and a third control signal, a transformer that receives the alternating current second voltage, a rectifier, and an output capacitor electrically coupled with the rectifier. The rectifier generates a direct current output voltage according to a fourth control signal and a fifth control signal, which is outputted across the output capacitor.
Abstract:
An electronic apparatus includes a housing having first and second cover bodies covering opposite first and second ends thereof, and a switch device including a support member, and a switch assembly mounted on and slidable relative to the support member and having first and second contact points. When one of the first and second cover bodies covers one of the ends of the housing and pushes one of the first and second contact points with the other one of the first and second contact points being unblocked, the switch assembly is placed in an OFF state. When the first and second cover bodies cover the ends of the housing and push the first and second contact points toward each other, the switch assembly is switched from the OFF state to an ON state.
Abstract:
A bobbin structure includes a hollow cylindrical body, a first blocking member extending outward from one end of the cylindrical body, a second blocking member extending outward from another end of the cylindrical body that is opposite to the one end, and a ring sleeved onto the cylindrical body between the first and second blocking members and movable relative to the cylindrical body for repositioning.
Abstract:
A method for estimating a distance between a first target and a second target in an image is to be implemented using a distance estimation system that includes a processor module. In the method, the processor module is programmed to: generate an image depth map associated with the image; generate first position information associated with a first position which corresponds to the first target in the image, and second position information associated with a second position which corresponds to the second target in the image; and compute an estimate of a distance between the first target and the second target based on at least the image depth map, the first position information, and the second position information.
Abstract:
A wireless testing system includes a main computer that controls a wireless module, a rotary mechanism, a measurement device, and an antenna. The rotary mechanism includes a rotatable seat controlled by the main computer to rotate about a first rotation axis, a support arm disposed on the rotatable seat, and a module rotating arm disposed on the support arm and positioning the wireless module at or in the vicinity of the first rotation axis. The module rotating arm is controlled by the main computer to rotate the wireless module about a second rotation axis. The antenna is substantially directed toward the wireless module. The measurement device is controlled by the main computer to control the antenna to receive or transmit a wireless signal.
Abstract:
A driving circuit includes: a switching element having a first terminal to receive an input voltage, and a second terminal; an inductor coupled to the second terminal of the switching element; a switch and a current sensing element coupled in series to the second terminal of the switching element; and a control module compensating a voltage sensed by the current sensing element based on at least one of the input voltage and an output voltage across the switching element and the inductor to generate a compensated signal, and switching the switch from an ON state to an OFF state when the compensated signal exceeds a reference threshold for a delay time.
Abstract:
A white light emitting device includes an LED chip capable of emitting light with a peak wavelength of 390 to 430 nm, and a wavelength conversion layer including first, second and third fluorescent materials. The first fluorescent material is capable of being excited to emit light with a peak wavelength of 450 to 470 nm. The second fluorescent material is capable of being excited to emit light with a peak wavelength of 450 to 470 nm. The third fluorescent material is capable of being excited to emit light with a peak wavelength of 630 to 650 nm. Light emitted by the white light emitting device has a color temperature below 5000 K, and a general color rendering index value (Ra) and special color rendering index values (R9-R15) all greater than 90.
Abstract:
An audio transceiver capable of wirelessly receiving source audio data from a multimedia device, and to be coupled to an audio playback device via a USB interface includes a processing unit that makes the audio transceiver appear as a virtual USB storage device to the audio playback device, and that establishes a virtual audio file to be read by the audio playback device. Upon receipt of a file segment request from the audio playback device via the USB interface, the processing unit generates an audio file segment data associated with the source audio data to have a format supported by the audio playback device and transmits the same to the audio playback device as playable audio data via the USB interface.
Abstract:
A direct current voltage conversion device includes a direct current to alternating current converter, a transformer, a first converter switch, a second converter switch and a clamping circuit. The clamping circuit clamps a voltage across the second converter switch to a preset value, and stores energy of a voltage peak across the second converter switch.
Abstract:
An LED package structure includes: an insulating substrate that has a front bonding pad assembly; a dark-colored die-attach adhesive; blue and green LED chips mounted on the front bonding pad assembly via the dark-colored die-attach adhesive; and a dark-colored and light-transmissible encapsulant that is disposed on the insulating substrate and that encapsulates the blue and green LED chips. The encapsulant has a light transmittance that ranges from 7% to 28% for the blue light and has a light transmittance that ranges from 9% to 30% for the green light.