Abstract: A comparator is disclosed. The comparator has a power input terminal used to input electricity, a first and a second to-be-compared voltage input terminal used to receive the first and second to-be-compared voltage, an offset voltage adjusting circuit used to adjust an offset voltage, a comparative circuit used to compare the first to-be-compared voltage and a third to-be-compared voltage which is a sum of the second to-be-compared voltage and the offset voltage and to generate a comparative result, and a comparative result output terminal used to output the comparative result.

Abstract: In an appointment-making method for a user's mobile device, a request for an appointment with a doctor is transmitted by the mobile device. Information as to doctors and services available for patient registration therewith is obtained and transmitted to the mobile device. A confirmation response from user's mobile device is received, and an appointment with a doctor is fixed. A registration number is assigned to the user in response to the received confirmation response. According to the assigned registration number, a patient queue for the doctor or the department is established, based on a predefined queue algorithm. Data as to queue length associated with the registration number is transmitted to the mobile device and payment of medical fees can also be made through the mobile device.

Abstract: An information processing method includes steps of obtaining one or more kinds of information in any kind of computer data, extracting a feature from the obtained information and determining at least one feature word which corresponds to the extracted feature, according to a relationship table. In response to user operation, at least one determined feature word can be changed. The target content can be searched according to at least one changed feature word.

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

Abstract: Compositions and methods for modulating transcription by RNA polymerases are described.

Abstract: A start control circuit is provided, which comprises a first switch unit, a start control unit and a second switch unit; the first switch unit is configured to determine a charging path of the start control unit according to the input signals of different start modes; the start control unit is configured to carry out the corresponding start modes, and start energy of the corresponding start modes is stored during a period of charging time corresponding to the charging path, thereby control the current of the second switch unit at the starting moment; and the second switch unit is configured to control an external circuit by receiving gating signals outputted from the start control unit. The present invention also provides a display panel driving circuit and a display device using the start control circuit.

Abstract: A flyback boost circuit is disclosed. The flyback boost circuit includes a converter, a switch module, a driving module and an output diode. The converter includes n number of primary coils and one secondary col. The switch module includes n number of switch components. Homonymous ends of the n number of primary coils respectively connect to the n number of switch components. The other end of the n number of primary coils respectively connects to an input voltage. The homonymous ends of the secondary coil connect to a positive end of the output diode, and the other end of the secondary coil is grounded. An output capacitor is connected between a negative end of the output diode and the ground. The driving module respectively provides control signals to n number of switch components such that only one of n number of switch components is sequentially turned on within a time period for which the duty cycle ratio equals to D. A sum of the duty cycle ratio of the n number of switch components is D.

Abstract: A negative voltage signal generation circuit is described. The first thin film transistor (TFT) connects the first ground terminal to the control signal generation unit. The second TFT switch connects to the first TFT switch, the control signal generation unit and the negative voltage signal output terminal. The first capacitor connects to the first TFT switch, the second TFT switch and the control signal generation unit. The present invention is capable of improving the stability of the negative voltage signal generation circuit.

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: A LED backlight driving circuit includes a voltage boosting circuit for converting an input voltage into an output voltage for a LED string; a current control module connected to a negative terminal of the LED string and for regulating a working current of the LED string; a driver chip for supplying the voltage boost circuit and current control module respectively with first and second square wave signals; a current detection module for detecting the working current of the LED string to generate detection signal; a control signal module for receiving the detection signal to generate a control signal; and a frequency regulation module for receiving the control signal to thereby generate a resistance. The frequency regulation module connects the driver chip, and the driver chip regulates a driving frequency of the driving circuit according to the resistance. A LCD device using the driving circuit also is provided.

Abstract: A communication device includes an instant messaging software (IMS) and a sensor. When an object nearby the sensor is detected, a trigger signal is generated by the sensor. When the IMS is activated to communicate with a target contact and the trigger signal is generated, communication content between a user of the communication device and the target contact within a predetermined time interval is analyzed to determine whether or not the communication content includes a phone number. If the communication content includes a phone number, a phone call between the communication device and the phone number is made.

Abstract: A LED backlight for a liquid crystal display (LCD), having a boost circuit for boosting in different display modes, an input voltage for operating each LED in a current display mode. The display modes include 2D and 3D display modes. A plurality of LED strings which are connected in parallel, wherein each LED string having a predetermined number of LEDs connected in series and receives the working voltage required for operating from the boost circuit. A current regulation circuit for regulating in the different display modes, with current flowing through each LED string, such that a ratio of the current flowing through each LED string in the 3D display mode and in the 2D display mode is changed. A controller provides a driving signal to drive the boost circuit, and provides different voltages to the current regulation circuit in the different display modes.

Abstract: An communications method for intercommunication by multiple electronic devices includes determining an on or off status of a first communication device, the first communication device being given master status if turned on and being used, and other devices being given slave status. If one other device is then used in preference to the first communication device, the other device is appointed as master and all other devices which are turned on are appointed as slaves. According to current state of the first communication device, the first communication device is turned off if not being used.

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: 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 flyback boost circuit is disclosed. The flyback boost circuit includes a converter, a switch module, a driving module and an output diode. The converter includes n number of primary coils and one secondary col. The switch module includes n number of switch components. Homonymous ends of the n number of primary coils respectively connect to the n number of switch components. The other end of the n number of primary coils respectively connects to an input voltage. The homonymous ends of the secondary coil connect to a positive end of the output diode, and the other end of the secondary coil is grounded. An output capacitor is connected between a negative end of the output diode and the ground. The driving module respectively provides control signals to n number of switch components such that only one of n number of switch components is sequentially turned on within a time period for which the duty cycle ratio equals to D. A sum of the duty cycle ratio of the n number of switch components is D.

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: 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.

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 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.