Abstract: A mobile power source with keyboard includes a power source body configured to charge an electronic device and a keyboard mounted to the power source body. A cover is rotatably mounted to the power source body. The cover is exposed out of the keyboard when rotating open, thus the keyboard can input instruction to the electronic device. The cover covers the keyboard to protect the keyboard when rotating to be closed.

Abstract: The embodiments herein describe a power converter including a controller that estimates input current of the power converter. The controller estimates the input current without explicitly sensing the input current. The estimated input current can be used in various applications such as regulating power factor and total harmonic distortion as well as estimating current required to maintain proper operation of a dimmer switch in light emitting diode lamp systems.

Abstract: A keyboard for supporting an electronic device includes a keyboard body and an adjusting device. The keyboard body defines a receiving portion for receiving an electronic device, a first adjusting hole, and a second adjusting hole. The adjusting device includes a stopping plate received in the receiving portion, a first adjusting pole, and a second adjusting pole. The first adjusting pole extends out of the first adjusting hole to abut against the stopping plate. The second adjusting pole extends out of the second adjusting hole to abut against the stopping plate. An angle is defined between the first adjusting pole and the electronic device and the angle is adjustable based on the first adjusting pole and the second adjusting pole being mounted to a plurality of positions.

Abstract: The embodiments disclosed herein describe a method of a controller to maintain a substantially constant average output current at the output of a switching power converter. In one embodiment, the controller uses a regulation voltage that corresponds to the primary peak current regulation level to regulate the average output current.

Abstract: A testing system for testing a layout of a power pin of a chipset on a circuit board includes a layout information obtaining module, a power pin sorting module, a transmission line sorting module, a transmission line length calculating module, and a report generating module. The layout information obtaining module obtains layout information of the printed circuit board. The power pin sorting module sorts the power pin from a number of pins of the chipset. The transmission line sorting module sorts transmission lines that are connected to the power pin and are located on outer layers of the printed circuit board. The transmission line length calculating module calculates a total length of the transmission lines sorted by the transmission line sorting module and compares the total length with a threshold length. The report generating module generates a testing report indicating whether or not the power pin is qualified.

Abstract: A system for modeling current transmission on a printed circuit board (PCB), the system includes a layout information obtaining module, a power setting module, a calculating module and an analyzing module. The layout information obtaining module obtains layout information of the PCB. The power setting module sets output voltages of multiple voltage regulating modules and a variation range of the output voltages. The calculating module builds a current transmission model script of the PCB according to the settings, executes the current transmission model script, and calculates working voltages of the multiple receiving terminals. The analyzing module compares the working voltages of the multiple receiving terminals with voltages of the variation range of the output voltages, and determines whether the layout information of the PCB complies with the design specification.

Abstract: A detecting device includes an input device, a display, and a computer system. The computer system includes a setting module, a storing module, a detecting module, and a control module. The storing module stores a PCB layout file. The setting module receives detecting parameters inputted by the input device. The detecting module detects the PCB layout file according to the detecting parameters to obtain detecting data corresponding to the detecting parameters. The control module displays a “fail” message on the display if the detecting data does not match standard data.

Abstract: A testing system includes a layout information obtaining module, a first power pin sorting module, a transmission line sorting module, a power pin filtering module, a distance calculating module, a comparing module, and a report generating module. The layout information obtaining module obtains layout information. The first power pin sorting module sorts a power pin from a plurality of pins of a IC. The transmission line sorting module sorts transmission lines. The power pin filtering module filters power pins from a plurality of pins of capacities in same transmission line. The distance calculating module calculates distances between the power pin of the IC and each of the power pins of the capacities. The comparing module compares each of the distances with a threshold distance. The report generating module generates a testing report to depict whether or not the sorted power pins of the IC are qualified.

Abstract: A wireless signal controlling circuit includes a control module, a wireless signal circuit, and a frequency-to-voltage converter connected to the wireless signal circuit. The control module includes a switch and a power supply. The power supply is connected to the frequency-to-voltage converter. The switch is used to control the power supply to supply a first voltage for the frequency-to-voltage converter. The frequency-to-voltage converter is used to change the first voltage to a second voltage for the wireless signal circuit.

Abstract: A display device includes a top frame, a display, a printed circuit board, and a bottom frame. The top frame includes an anti-EMI cover panel and a securing portion extending from the anti-EMI cover panel. A receiving space is surrounded by the securing portion. The display is mounted in the top frame. The bottom frame includes a bottom panel and a mounting flange extending from the bottom panel. The printed circuit board is mounted on the bottom panel. The mounting flange is received in the receiving spaced and abuts an inner side of the securing portion. The anti-EMI cover panel, the securing portion, and the bottom frame cooperatively define an enclosed space for anti-EMI.

Abstract: A testing system for testing a layout of a power pin of a chipset on a circuit board includes a layout information obtaining module, a power pin sorting module, a transmission line sorting module, a transmission line length calculating module, and a report generating module. The layout information obtaining module obtains layout information of the printed circuit board. The power pin sorting module sorts the power pin from a number of pins of the chipset. The transmission line sorting module sorts transmission lines that are connected to the power pin and are located on outer layers of the printed circuit board. The transmission line length calculating module calculates a total length of the transmission lines sorted by the transmission line sorting module and compares the total length with a threshold length. The report generating module generates a testing report indicating whether or not the power pin is qualified.

Abstract: A printed circuit board assembly comprises a PCB and a shielding structure. The PCB comprises a top surface, a bottom surface, a first side surface, a second side surface, a third side surface, and a fourth side surface. A signal transmission line is laid in the top surface. The shielding structure is attached to the PCB and securely contacts the first side surface, the second side surface, the third side surface, and the fourth side surface. Edges of the top surface and the bottom surface are configured to shield EMI in the signal transmission line when transmitting high-speed differential signals.

Abstract: A printed circuit board includes a board body, a signal transmission line laid in the board body, and a metal bracket attached to the board body. The metal bracket tightly abuts side surfaces of the board body and shields electromagnetic interference of the signal transmission line when the signal transmission line transmits high-speed differential signals.

Abstract: An system for testing direct current (DC) layout of a printed circuit board, the system includes a layout information obtaining module, a rule loading module, a test script building module, a script executing module, and a report generating module. The layout information obtaining module obtains layout information of the printed circuit board. The rule loading module load DC transmission rules. The test script building module builds a DC transmission test scrip of the printed circuit board according to one of the DC transmission rules. The script executing module executes the DC transmission test script to determine whether the layout information of the printed circuit board complies with the one of the DC transmission rules. The report generating module generates a DC transmission testing report depicting whether the layout information of the printed circuit board complies with the one of the DC transmission rules and displays the testing report.

Abstract: The embodiments herein describe a power converter including a controller that estimates input current of the power converter. The controller estimates the input current without explicitly sensing the input current. The estimated input current can be used in various applications such as regulating power factor and total harmonic distortion as well as estimating current required to maintain proper operation of a dimmer switch in light emitting diode lamp systems.

Abstract: Communication and a communications apparatus are controlled with a communication intermediating apparatus. Multiple methods of processing communication requests are provided. Decided rules comprising of pairs of identification information of communication requests and methods of processing are recorded beforehand. When a communication request is received, the identification of the communication request is distinguished, an applying rule is picked from the recorded rules, and the communication request is processed. A virtual account to be set maximum payment amount beforehand is used, and electronic transactions communication is done.

Abstract: A TRIAC dimmer controller for an LED lamp dynamically adjusts the amount of additional current supplied to the TRIAC dimmer based on the TRIAC dimmer operating mode. A TRIAC dimmer current controller continually senses the TRIAC dimmer current loading and determines a TRIAC dimmer operating mode based on the detected current. The TRIAC dimmer controller compares the detected current with a threshold current value called a TRIAC holding current, and adjusts the amount of bleeder current based on the difference between the detected current and the threshold current value. By continually sensing the TRIAC dimmer current loading, the LED controller regulates the amount of bleeder current supplied to the TRIAC dimmer using a single sink current path to satisfy the TRIAC dimmer current demands of multiple TRIAC dimmer operating modes.

Abstract: The embodiments disclosed herein describe a method of a controller to maintain a substantially constant average output current at the output of a switching power converter. In one embodiment, the controller uses a regulation voltage that corresponds to the primary peak current regulation level to regulate the average output current.

Abstract: The embodiments disclosed herein describe the adjusting of filter bandwidths in a multi-loop LED dimmer control circuit based on received dimmer input signals. The bandwidth of a filter in an active loop (a loop driving an LED power circuit) is decreased to prevent signal noise and associated LED flickering. Likewise, the bandwidth of a filter in an inactive loop (a loop not driving the LED power circuit) is increased to a pre-determined maximum in order to improve response time and decrease potential overshoot or undershoot during dimmer adjustment.

Abstract: Communication and a communications apparatus are controlled with a communication intermediating apparatus. Multiple methods of processing communication requests are provided. Decided rules comprising of pairs of identification information of communication requests and methods of processing are recorded beforehand. When a communication request is received, the identification of the communication request is distinguished, an applying rule is picked from the recorded rules, and the communication request is processed. A virtual account to be set maximum payment amount beforehand is used, and electronic transactions communication is done.