Abstract: The present invention relates to a circuit and method for optimizing an input voltage range of an IC chip.

Abstract: The present disclosure discloses an LED boost converter and an LED backlight driver using the same. The LED boost converter comprises an inductive boost circuit used in different display modes for boosting an input voltage to a working voltage necessary for the operation of LED in a current display mode; a detecting circuit used in different display modes for selecting different detecting resistors for the different display modes so as to provide different detecting currents in the inductive boost circuit; and a controller used for providing a pulse width modulation signal so as to drive the inductive boost circuit, and for detecting whether a detecting voltage corresponding to the detecting current exceeds a reference voltage.

Abstract: The present disclosure discloses a flyback quick start driving circuit, comprising: a voltage input unit, a transformer including a primary winding, a secondary winding, and an auxiliary winding, a driving unit for controlling the primary winding of the transformer, a voltage pull-up unit, and a feedback control unit. The voltage pull-up unit performs a charging process according to the direct-current from the voltage input unit, so as to enable the output voltage rise up to a starting voltage which is input the driving unit. The driving unit output a control signal to drive the primary winding. Thus, a voltage is created across the auxiliary winding. The feedback control unit gets the voltage of the auxiliary winding, and determines whether to stop the charging of the voltage pull-up unit or not according to the voltage of the auxiliary winding. The circuit can be started quickly and have lower loss of the power.

Abstract: The present invention provides a flyback switching power supply circuit and a backlight driving device using the same, the circuit includes: a transformer, including a primary winding, a secondary winding and an auxiliary winding arranged on one side of the primary winding; an output rectifier, connected to the output end of the flyback switching power supply circuit from the secondary winding of the transformer; a switching transistor, configured to control the voltage on the primary winding; a controller, configured to provide a pulse width modulation signal for driving the gate of the switching transistor; and a clamping delay circuit, configured to clamp the potential of the gate of the switching transistor to a low potential, so that the switching transistor is turned on at the wave trough of drain potential damped vibration.

Abstract: An over-current protection circuit includes a boost circuit, a voltage control module and an over-current protection module. The boost circuit boosts an input direct current (DC) voltage to a boosted DC voltage and for providing the boosted DC voltage to a load. The voltage control module controls the boost circuit to provide the boosted DC voltage to the load such that the load is driven by a constant current. The over-current protection module generates first control signals or second control signals according to an over-current protection voltage detected by the boost circuit. The first control signals are for controlling the voltage control module to operate normally, and the second control signals are for stopping operations of the voltage control module. In addition, the LED backlight driving circuit and the liquid crystal device incorporating the above over-current protection circuit are also disclosed.

Abstract: An OVP circuit includes a voltage boost circuit, for boosting an input voltage into an output voltage in need and providing the output voltage to a load, a voltage control module for controlling the voltage boost circuit to boost an input voltage into an output voltage in need and for providing the output voltage to the load, an overvoltage protection module for monitoring a voltage of a positive terminal of the load to enable or disable the voltage control module, and an overvoltage adjusting module for monitoring an operation voltage of the load to adjust the overvoltage. It effectively prevents from the abnormal operation attributed by over practical operation voltage or prevents components from damage attributed by tardy protection. The present invention also proposes an LED backlight driving circuit using the OVP circuit and an LCD having the LED backlight driving circuit.

Abstract: The present invention provides a DC boost topology circuit for backlight driving, which includes a coupling inductor including a primary coil having an end connected to a DC voltage input terminal and an opposite end connected to a secondary coil and a field-effect transistor that has an end grounded. An energy storage module includes a first capacitor and a first diode. The secondary coil has an end connected to the first capacitor and an opposite end connected to an opposite end of the primary coil and the first diode of which an opposite end connected to an opposite end of the first capacitor. A circuit protection unit has an end connected to a common terminal of the first diode and the first capacitor and an opposite end connected to a DC voltage output terminal. The topology circuit has an output voltage that is multiple times of that of known circuits.

Abstract: An updated contents notification method includes determining and storing a plurality of favorite websites. The method obtains contents of webpages corresponding to the stored favorite websites from a web server via a first communication unit, and determines whether the contents of webpages corresponding to the stored favorite websites have been updated. The method further obtains the updated contents of the webpages when the contents have been updated, converts the obtained updated contents of the webpages to short message service (SMS) messages, and transmits the converted SMS messages to a mobile phone via a second communication unit, to notify each relevant webpage.

Abstract: A LED backlight source and a liquid crystal device are disclosed. The LED backlight source includes: a boost circuit for boosting an input DC voltage and for outputting the boosted DC voltage; a plurality of LED strings connected in parallel, wherein each of the LED strings comprises a plurality of serially connected LEDs and a first resistor, and each of the LED strings receives the boosted DC voltage from the boost circuit; an over-current protection circuit for controlling an output power of the boost circuit according to a detected resistance; and a short-connection protection circuit for adjusting the resistance detected by the over-current protection circuit according to a voltage at two ends of the first resistor.

Abstract: A network connecting device communicates with a network providing device and a terminal device. The network providing device can send authorization information for providing a network. The terminal device can send a request for sharing the network. The network connecting device obtains the authorization information sent by the network providing device and the request sent by the terminal device. The network connecting device connects the terminal device to the network provided by the network providing device according to the authorization information. A network connecting system and method are also provided.

Abstract: A LED backlight driving circuit is disclosed. The driving circuit includes a boost circuit for converting an input voltage to a needed output voltage and for providing the output voltage to at least one LED strings, a follower circuit connecting to a negative end of the LED string, and a reference voltage module connecting to a reference voltage and the follower circuit. The follower circuit is for detecting a negative end voltage of the LED string and for generating a follower voltage according to the negative end voltage. The follower voltage couples with a reference voltage module. The reference voltage module adjusts the output voltage according to the follower voltage generated by the follower circuit. The output voltage is adjusted in accordance with the voltage drop of the LED string. In addition, a liquid crystal device including the LED backlight driving circuit is also disclosed.

Abstract: An authentication system and method thereof capture an image of a user and extract biometric features of the user from the image to determine whether a stored biometric feature matches with the extracted biometric features. If there is a match, an interactive information is generated to invite the user to perform actions shown or specified or described by the interactive information. The user will be authenticated if an action of the user matches the required action in a timely fashion. An electronic device using the same is also provided.

Abstract: The present invention discloses an LED backlight system and a display device. The LED backlight system includes an LED display module and an LED backlight control circuit. The LED display module includes LED string. The LED backlight control circuit includes a current module, a comparison unit, a control switch unit, and an impedance unit wherein, an input terminal of the comparison unit obtains a voltage at a negative terminal of the LED string, and when the voltage at the negative terminal is greater than a preset threshold voltage, the comparison unit controls the control switch unit to turn on such that the impedance unit connects in parallel with the current module so as to decrease the voltage at the negative terminal. Through above way, the present invention can prevent the unstability of the circuit loop in order to prevent the flicker phenomenon of the backlight system.

Abstract: An electronic device is connected to a network, and includes a storage unit, the storage unit stores a speed of data transmission required by the electronic device when the electronic device is displaying a video from the network. A method for managing network bandwidth distribution of an electronic device includes the following steps. Detecting a speed of data transmission the network provided to the video displayed by the electronic device. Comparing the detected speed with the stored speed. If the detected speed is greater than the stored speed, decreasing a network bandwidth provided to the video. If the detected speed is less than the stored speed, controlling the running application of the electronic device which occupies the network bandwidth to stop running.

Abstract: An electronic device communicates with a plurality of household appliances to execute a method to control the household appliances. A reference orientation of each household appliance relative to the electronic device is obtained and stored in a storage. When an acceleration of the electronic device exceeds a predetermined value, a movement orientation of the electronic device is detected and one or more household appliances having the reference orientation matching the movement orientation of the electronic device are displayed in a selectable image via a display. One or more household appliances selected from the selectable image can be controlled to perform corresponding functions using the electronic device according to user operations.

Abstract: An information filtering method is applied in a core network connected to a number of access networks. Each access network includes at least one access point for connecting user equipment to the core network. The method includes the following steps. Obtaining connecting configuration of one access point when the core network sends information to user equipment connected to the core network via the access point. Determining the access point belongs to which access network according to a first relationship between connecting configurations of each access point and the access network each access point belongs to. Determining which type the determined access network is. Determining the information needed to be filtered according to a second relationship between different types of the access networks and information needed to be filtered. Filtering the determined information to prevent the determined information from being accessed by the user equipment.

Abstract: A server communicates with a number of terminal devices. Each terminal device stores a file having a same file name. The server generates a trace log. The trace log records modification of the file in each of the terminal devices. The server further determines whether or not one of the terminal devices opens the file, searches in the trace log according to the file name of the file to find all the modifications corresponding to the file, determines the latest modification among all the modifications in the terminal devices according to the modification time corresponding to each of the found modifications, and displays at least a part of content of the found latest modification in the terminal device which currently runs the file.

Abstract: The invention provides LED backlight source, including: a boost converter, for boosting input voltage and outputting boosted voltage; N parallel LED strings, wherein each LED string including a plurality of series LEDs and receiving boosted voltage; a backlight driving IC, for controlling connection/disconnection of boost converter and determining whether to shut down LED strings other than specific LED string based on voltage at negative terminal of specific LED string; and N control circuits, wherein each control circuit controlling voltage at negative terminal of corresponding LED string not to become zero so that backlight driving IC unable to shut down LED strings other than corresponding LED string. When an LED string becomes open, backlight driving IC cannot shut down LEDs strings other than the open LED string to avoid turning off all LED strings. The invention also provides liquid crystal display with LED backlight source.

Abstract: A household appliance control method sets a number of orientations of a number of household appliances in a particular area. Each orientation corresponds to one of the household appliances. A sliding operation applied to a touch screen of an electronic device is obtained. When a direction of the sliding operation matches the orientation of one of the household appliances, a control signal is sent to a corresponding household appliance to control the household appliance to perform a corresponding function.

Abstract: A vehicle detecting system, a vehicle detecting method adapted for a vehicle, and a computer-readable storage medium encoded with a computer program are disclosed. The system controls two cameras to capture images in the front of the vehicle and at the back of the vehicle respectively, according to a speed and a direction of the vehicle. The system further determines whether or not two images from each camera are the same, if the two images from each camera are different, the vehicle is in a dangerous driving condition, and when times of the dangerous driving condition within a preset time period reaches a preset value, the system outputs a warning to prompt a driver.