Abstract:
A drive circuit for light emitting diode (LED) is provided, which is used to drive a plurality of LEDs to emit light. The LEDs are connected in series into a plurality of LED strings. The drive circuit includes a power converter, a detection circuit, and a report circuit. The power converter provides a driving voltage to the LED strings, and the detection circuit detects a string voltage of each LED string, and compares the string voltage with a default reference voltage, so as to determine whether the string voltage is different from the reference voltage (which indicates that the LED string is operated under a non-default state), and sends a detection signal to the report circuit. The report circuit receives the detection signal and outputs the control signal to the power converter, such that the power converter adjusts the driving voltage according to the control signal.
Abstract:
An illuminating device and a luminance switching device thereof for controlling luminance of light emitting states of LED light source are provided. The luminance switching device includes a changeover switch which is electrically connected to the luminance switching device for switching the light-emitting states of the LED light source and has switching modes corresponding to the light-emitting states, a detecting circuit for detecting the switching mode corresponding to the changeover switch, a memory unit for storing luminance values of the LED light source corresponding to the switching modes detected by the detecting circuit, converting the luminance values of the LED light source into a luminance control signal, and transmitting the luminance control signal to the detecting circuit, and a power conversion circuit for receiving the luminance control signal transmitted from the detecting circuit, such that the LED light source produces luminance of the light-emitting states corresponding to the switching modes.
Abstract:
A memory card connector has an insulative frame receiving conductive terminals therein, a slide guiding mechanism assembled on the insulative frame, and a shell. The slide guiding mechanism includes a sliding bar, a guiding bar, and a resilient element. The sliding bar defines a guiding groove. A link portion is formed on an end of the sliding bar. A driving member is arranged at an end of the sliding bar and opposite the link portion, and has a pushing portion and a drawing portion. A driven member has a pushed portion and a drawn portion. The driven member cooperates with a stop member to control stopping of a member card. The slide guiding mechanism further includes a first conductor and a second conductor respectively communicating with ends of a detecting circuit of a circuit system for detecting ejection of the memory card at the earliest time.
Abstract:
An electrical connector (1) includes a terminal module (32), a metallic shield (31) surrounding the terminal module, an outer dielectric cover (10) surrounding a major portion of the shield and a pair of a latching mechanism (50) attached to the cover. The terminal module includes a mating portion having a number of conductive terminals exposed therein. The shield includes a resilient latching beam (20) having a driving portion (22) and an outwardly latching portion (21). The latching mechanism includes a button (40) for deflecting the driving portion inwardly to urge the latching portion inwardly toward the mating portion, and a spring (46) and a spring assembled to the button and abutting against the shield for providing enough release strength to push the button to a normal position.
Abstract:
An audio jack designed to be wedged between a printed circuit board and a fixed portion of an electronic device in which it is mounted, thereby obviating the need to solder contacts thereof to the printed circuit board. The audio jack includes a housing (1) and a plurality of contacts received in the housing. The housing defines a longitudinal plug-insertion hole (12) therethrough for receiving a mating plug. Each contact (3, 4, 5, 6) includes a base (30, 40, 50, 60) and a tail portion (32, 41, 51, 61). Each tail portion extends downwardly and inwardly from a bottom of the base. A contact tab (321, 411, 511, 611) is formed on a distal end of each tail portion for resiliently abutting against circuit traces of a printed circuit board.
Abstract:
An audio jack includes an insulating housing (1), a retention pad (4), at least one resilient contact (2) and at least one fixed contact (3). The housing defines a longitudinal hole (12) therethrough for receiving a mating plug (50). The retention pad has a base (40) and a protrusion (41) formed in substantially a middle of the base for pressing against the plug. The resilient contact includes a fixing section (21) for retaining in the housing and a cantilevered beam (24) diagonally extending opposite to the fixing section. The cantilevered beam extends into the hole from a top wall (13) of the housing and forms a contact section (25) at a distal end of the cantilevered beam for contacting the plug. The force provided by the protrusion against an inserted plug controls the force acting against the cantlevered beams, protecting the beams from failure.
Abstract:
Embodiments disclosed herein relate to a speech system for a vehicular device holder. The speech system can include a sensor base embedded with an inductive circuit chip and a surface for holding a device. The inductive circuit chip can comprise at least one identification code. The speech system may also include a mobile computing device coupled to the sensor base and configured with a local terminal application. The mobile computing device can be placed within the surface of the sensor base to transmit the at least one identification code. The speech system may also include a remote server that is configured to received the identification code from the mobile computing device, and authenticate the identification code, and transmit an acknowledge signal to the mobile computing device. The speech system may also include an input device coupled to the remote server and mobile computing device.
Abstract:
The invention discloses a clamping activation method, applicable to an electric clamping device with wireless charging, the electric clamping device comprising a body and a wireless charging module, a control unit, and an electric clamping assembly, all disposed inside the body. The clamping activation method comprises: the control unit receiving a signal generated by the wireless charging module; the control unit activating the electric clamping assembly to clamp the electronic device according to the signal; and the control unit activating the wireless charging module to charge the electronic device. As such, the electric clamping device can automatically clamp the electronic device without installing additional sensing elements or switches.
Abstract:
The disclosure provides a wireless charging alignment method and system, the system comprising an electronic device and a wireless charging device, the electronic device having a display screen capable of displaying at least an marking symbol, the wireless charging device having a placement surface, the wireless charging device being disposed with at least a wireless charging module inside the placement surface, and the wireless charging device further comprising at least a corresponding symbol; the alignment method of the present invention is, in the process of placing the electronic device on the placement surface, to align the marking symbol to the corresponding symbol is aligned with the corresponding symbol, thereby quickly and accurately completing the alignment of the wireless charging, and a better subsequent charging performance can be performed.
Abstract:
A collision avoidance method for transmitting data from multiple wireless tire condition sensors on a vehicle is executed by each wireless tire condition sensor having a unique ID and multiple different wake-up times. After the sensor is operated to sense data, the method has steps of reading the ID and computing a determination value with the ID and a variable, selecting one of the wake-up times according to the determination result, and after the selected wake-up time expires, transmitting the sensed data. As the selected wake-up times of the sensors differ from one another, data collision at the receiving end arising from data transmission from the sensors can be avoided. Additionally, besides the wake-up time, a time gap between data transmitted twice consecutively from each sensor can be employed to achieve data collision avoidance.