1529results about How to "Simple circuit structure" patented technology

The invention discloses a backlight source driving circuit and a driving circuit thereof as well as a liquid crystal television which are provided mainly aiming at the problems of multiple components, complicated structure and the like of the existing backlight source driving circuit. The backlight source driving circuit disclosed by the invention comprises a backlight source power supply circuitand a control circuit, wherein the backlight source power supply circuit supplies the voltage which is needed by the operation to a backlight source load according to the received driving pulse signals which are output by the control circuit; and the control circuit responses to control voltage signals, samples the operating current of the backlight source load in real time, and generates and outputs the corresponding driving pulse signals according to the sampled current signals. The backlight source driving circuit disclosed by the invention has the advantages of simple structure and stabledriving.

Cell power supply lines are arranged for memory cell columns, and adjust impedances or voltage levels of the cell power supply lines according to the voltage levels of bit lines in the corresponding columns, respectively. In the data write operation, the cell power supply line is forced into a floating state according to the bit line potential on a selected column and has the voltage level changed, and a latching capability of a selected memory cell is reduced to write data fast. Even with a low power supply voltage, a static semiconductor memory device that can stably perform write and read of data is implemented.

A level shift element adjusting a voltage level at the time of selection of a word line according to fluctuations in threshold voltage of a memory cell transistor is arranged for each word line. This level shift element lowers a driver power supply voltage, and transmits the level-shifted voltage onto a selected word line. The level shift element can be replaced with a pull-down element for pulling down the word line voltage according to the threshold voltage level of the memory cell transistor. In either case, the selected word line voltage level can be adjusted according to the fluctuations in threshold voltage of the memory cell transistor without using another power supply system. Thus, the power supply circuitry is not complicated, and it is possible to achieve a semiconductor memory device that can stably read and write data even with a low power supply voltage.

Cell power supply lines are arranged for memory cell columns, and adjust impedances or voltage levels of the cell power supply lines according to the voltage levels of bit lines in the corresponding columns, respectively. In the data write operation, the cell power supply line is forced into a floating state according to the bit line potential on a selected column and has the voltage level changed, and a latching capability of a selected memory cell is reduced to write data fast. Even with a low power supply voltage, a static semiconductor memory device that can stably perform write and read of data is implemented.

A high-speed vision sensor includes: an analog-to-digital converter array 13, in which one analog-to-digital converter 210 is provided in correspondence with all the photodetector elements 120 that are located on each row in a photodetector array 11; a parallel processing system 14 that includes processor elements 400 and shift registers 410, both of which form a one-to-one correspondence with the photodetector elements 120; and data buses 17, 18 and data buffers 19 and 20 for data transfer to processing elements 400. The processing elements 400 perform high-speed image processing between adjacent pixels by parallel processings. By using the data buses 17, 18, it is possible to attain, at a high rate of speed, such calculation processing that requires data supplied from outside.

A battery pack having a secondary battery is disclosed. The battery pack comprises at least one voltage converter; and switching means for switching an operation mode of the voltage converter to one of a charging mode and a discharging mode, in the charging mode, a charging voltage being output to the secondary battery, in the discharging mode, a voltage of the secondary battery being converted into a predetermined discharging voltage and the converted voltage being output.

In a power supply apparatus for a vehicle, an inverter circuit inputs a voltage from a first battery unit through switches. A smoothing condenser is provided between the first battery unit and the inverter circuit in parallel. A DC-DC converter is provided between the smoothing condenser and a second battery unit to voltage-convert electric energy stored in the first battery unit or the smoothing condenser to supply to the second battery unit, and to voltage-convert electric energy stored in the second battery unit to supply to the smoothing condenser. An electronic control unit controls the DC-DC converter before starting power supply to the inverter circuit, such that the switches are closed after the smoothing condenser is charged to a voltage within a predetermined permission voltage range from the voltage of the first battery unit.

The present invention provides a method to automatically regulate brightness of liquid crystal displays (LCDs), which resolves the overload and easy fatigue of human eyes and poor image contrast due to high brightness of the conventional LCD. The present invention includes use of four parts, including an image brightness regulating unit, an image brightness ratio computation and output controlling unit, an ambient light detection and brightness adaptation regulating unit and an image gray level expanding unit. The image signals of an LCD are processed in such a manner to enable automatic control of optical flux of LCD TV by regulating the gray level of output images. Also, optical flux of LCD TV can be automatically controlled with the change of images and ambient light, thus alleviating overburdening of human eyes and improving the contrast and comfort of images for a better visual effect.

A device housing a battery 50 includes a receiving coil 51, and a charging pad 10 includes a transmitting coil 11 that magnetically couples with, and supplies charging power to the receiving coil 51. The device further includes a modulator circuit 61 that changes the impedance of the receiving coil according to internal battery 52 data. The charging pad further includes a detection circuit 17 that detects receiving coil impedance changes to detect the battery data. The modulator circuit 61 has a load circuit 62 that is connected in parallel with the receiving coil 51 and has a series-connected switching device 64 and impedance modulating capacitor 63, and a control circuit 65 that switches the load circuit 62 switching device 64 ON and OFF according to the battery data. The modulator circuit 61 switches the switching device 64 ON and OFF to transmit battery data to the charging pad 10.

An electric power source for a motor vehicle is equipped with a welded state discriminator, and while a positive-side contactor and negative-side contactor are controlled to be switched off, the welded state discriminator detects a voltage of a positive-side contactor or negative-side contactor on its loading side with respect to a connecting point of a battery unit on a positive side and a battery unit on a negative side, so that when in a plus voltage where the detected voltage thus obtained is larger than a predetermined voltage, the positive-side contactor is judged to be in a welded state, and when in a minus voltage where the detected voltage is larger than the predetermined voltage, the negative-side contactor is judged to be in a welded state.

This present invention provides a bridge battery voltage equalizer to equalize the voltages of the serially connected battery strings, comprising at least one battery crossing over an energy-transferring circuit. A plurality of the energy-transferring circuits are interconnected in a bridge architecture. Each energy-transferring circuit having four nodes comprises a first semiconductor switch, a first diode, a second semiconductor switch, a second diode, and an inductor. One end of the first element switch is connected to a negative pole of the first diode thereto. A positive pole of the second diode is connected to one end of the second element switch thereto. The inductor is an energy storing element that crosses over between the negative pole of the first diode and the positive pole of the second diode.

The method of data transmission embedded in electric power transmission disposes a transmitting coil 11 and a receiving coil 31 in close proximity, transmits electric power in a non-contact fashion from the transmitting coil 11 to the receiving coil 31 by magnetic induction, and transmits data from the receiving coil 31 side to the transmitting coil 11 side. The method of data transmission changes the load on the receiving coil 31 and detects transmitting coil 11 current change corresponding to that load variation to send data from the receiving coil 31 side to the transmitting coil 11 side.

A television receiver according to the present invention successively transmits the same transmission command to external devices (1a)˜(3b) connected through IEEE (1394) lines and HDMI lines, and monitors the DC levels of HDMI terminals to which the respective HDMI lines are connected, thereby to discriminate the HDMI lines used for transmission of response commands that are outputted from the respective BD recorders (1b)˜(3b) in response to the transmission commands, and then automatically performs switching between the IEEE (1394) lines and the HDMI lines which are used by the respective BD recorders (1b)˜(3b), according to the operations of the BD recorders (1b)˜(3b). Therefore, with respect to the plural external devices which are connected to the television receiver through the HDMI lines and the IEEE (1394) lines, it is possible to automatically recognize as to which external devices are connected to which HDMI lines, whereby bothersome settings as those required in the conventional device are dispensed with, leading to enhanced user operability.

An over-current and over-voltage protection circuit for an electronic cigarette, comprising a battery and an interface, a control unit and a charging detection switch unit; the control unit is configured for calculating an actual charging current according to the first working voltage and determining whether the actual charging current exceeds a preset charging current threshold value, and sending a first charging controlling signal to the charging detection switch unit; the control unit is further configured for real-timely detecting an input voltage of the interface, determining whether the input voltage of the interface is in over-voltage status, and controlling a turned-on or turned-off operation of the charging detection switch unit. The over-current over-voltage protection circuit and method eliminate the security risk of the battery pole not having a charging management circuit in the non-normal charging status.

The present application relates to a cascaded H-Bridge medium voltage drive, a power cell, and a bypass module thereof, wherein the bypass module is configured for bypassing a major circuit module of the power cell, while the major circuit module comprises a fuse, a rectifier, a bus capacitor and an H-Bridge inverter, two points led from the H-Bridge inverter being configured as a first output end and a second output end; a bypass circuit comprises a first bridge arm and a second bridge arm; a point led from the first bridge arm is configured as a first input end of the bypass circuit, a point led from the second bridge arm is configured as a second input end of the bypass circuit, and the first input end is electrically connected with the first output end, the second input end is electrically connected with the second output end.

A radio frequency identification (RFID) reader is provided, having a transmitting circuit that generates a transmitted signal to operate an RFID tag, a receiving circuit that receives a received signal including a tag signal from the RFID tag and a transmission carrier leakage signal leaking from the transmitting circuit, and a leakage removing circuit that senses a phase and amplitude of the transmission carrier leakage signal inputted to the receiving circuit, converts the transmitted signal from the transmitting circuit into a signal having a phase opposite to that of the transmission carrier leakage signal and an amplitude equal to that of the transmission carrier leakage signal, and synthesizes the converted signal and the received signal inputted to the receiving circuit.

A temperature control device for a target substrate includes a mounting table having temperature control members respectively provided in temperature systems to control temperatures of regions of the target substrate to respective predetermined temperature levels; circulation channels through which fluids passing through the temperature control members flow; and heating channels each for flowing therein a heated fluid having a higher temperature compared to the fluids circulating in the circulation channels. The device further includes cooling channels each for flowing therein a cooled fluid having a lower temperature compared to the fluids circulating in the circulation channels; and joining units that join the circulation channels to build the respective temperature control systems, the joining units having flow rate control units that controls flow rate ratios of the fluids supplied from the respective channels to the temperature control members.

This invention discloses an electronic cigarette circuit, including an IC, an airflow sensor connected to the IC, a heating wire and a power supply VDD connected to the IC and the heat wire, the electronic cigarette circuit further including a switch device, the switch device being connected with the heating wire and the power supply VDD to form a circuit loop. The electronic cigarette circuit of the present invention adopts a switch device placed outside the IC, and the IC, the heating wire and the power supply form the circuit loop, so as to achieve high power output to the heating wire, and a large amount of smoke, with a simple circuit structure for ease mass production.

The invention discloses an electric-heating full-automatic soybean milk machine with fuzzy control, comprising a nose, a cup body, a motor, a motor transmission shaft, a rotary blade, a heating element, a temperature-measuring sensing head, an anti-overflow sensing head, an anti-dry-burning sensing head and a control circuit board, wherein because of the adoption of the control circuit board, a preparation method of soybean milk, is programmed and systemized, intelligent control on the processing process of the soybean milk is realized by a single chip microcomputer, especially the functions of automatically adjusting the heating power according to the temperature and controlling the temperature rising rate can be introduced during a plurality of time intervals in the processing process of the soybean milk.

A driver power supply circuit stepping down a power supply voltage is arranged at a power supply node of a word line driver. The driver power supply circuit includes a non-silicide resistance element of N+ doped polycrystalline silicon, and a pull-down circuit lowering a voltage level of the driver power supply node. The pull-down circuit includes a pull-down transistor having the same threshold voltage characteristics as a memory cell transistor pulling down a voltage level of the driver power supply node, and a gate control circuit adjusting at least a gate voltage of the pull-down transistor. The gate control circuit corrects the gate potential of the pull-down transistor in a manner linked to variations in threshold voltage of the memory cell transistor.

An uninterruptible power supply with sine wave AC output and energy recycle function is disclosed. The uninterruptible power supply makes use of a DC / DC converter to boost and convert the DC voltage of a battery set to a full-wave rectified shaped DC voltage. A microcontroller is provided to generate a full-wave rectified shaped DC reference signal to force the DC / DC converter to follow the reference signal for adjusting its output to a full-wave rectified shaped DC voltage. The full-wave rectified shaped DC voltage is converted by an inverter to a sine wave AC voltage for providing uninterruptible power. An energy recycle charger is further provided to recycle redundant energy to the battery set.

A system for improving a spatial effect of stereo sound or encoded sound when producing three dimensional image sound signals from signals of stereo channel includes a spatial effect enhancing portion where a signal for enhancing spatial effect and directivity of sound is produced, a band enhancing portion where a signal for enhancing a signal component of the stereo channel signal in a low frequency range and for maintaining the signal component in a middle frequency range is generated, and a matrix portion where the output signal of the spatial effect enhancing portion, the output signal of the band enhancing portion and the stereo channel signal are calculated in a matrix manner, so that the spatial effect of sound is improved using a differential component between left and right side channel signals. According to the invention, the spatial effect of sound can be improved without using a complicated circuit construction, the deterioration of S / N ratio is prevented, and the cost performance for realizing a spatial effect of sound is remarkably improved.

Provided is an uninterruptible power supply for providing a sinusoidal-wave output AC voltage. The uninterruptible power supply is advantageous in terms of a DC / DC converter unit consisted of a plurality of DC / DC converter, in which the input terminals of the DC / DC converters are connected in parallel with each other and the output terminals of the DC / DC converters are connected in series with each other. The output DC voltages of the DC / DC converters are configured to sum up to form a full-wave rectified DC voltage, which can be converted into a sinusoidal-wave output AC voltage by an inverter. Furthermore, the uninterruptible power supply provides an energy recycle converter configured for recycling the redundant energy of the uninterruptible power supply to charge a battery pack.

The contactless method of supplying power magnetically couples a portable device receiving coil with a power supply stand transmitting coil and transmits power by magnetic induction. The portable device sends power adjustment signals to the power supply stand, and the stand adjusts transmitting coil output based on the power adjustment signals. The portable device compares the power received from the stand to the required power, sends an increase-power-request signal if the received power is below the required power, and sends a decrease-power-request signal if the received power is above the required power. Power adjustment signals include increase-power-request weighting values that increase with the size of the request to increase power and / or rate-of-change weighting values that increase with the amount of change in the requested power. Weighting values output with a given period are added and a foreign object is judged to be present when the sum attains a set value.

The invention discloses an LED driving circuit and a controlling method thereof, comprising a power switch and a current sampling unit, as well as a voltage comparison unit for comparing the voltage obtained by the current sampling unit with a first reference voltage; an input voltage sampling unit for converting the sampled input voltage into a current signal; a timing unit for controlling the off-time of the power switch or presetting a fixed off-time; a logical unit for controlling the power switch by means of a power switch driving unit and for controlling the timing switch in the timing unit. The method for controlling the LED driving circuit comprises the step of modulating the off-time of the power switch with the input voltage or the step of presetting a fixed off-time. The invention can be used in LED light cluster driving with the power factor greater than 0.95.

A capacitance type sensor installed in a vehicle includes the first electrode, the second electrode, and the third electrode. The first electrode is arranged inside a seating portion of a seat or a backrest portion of the seat, or both. The second electrode is arranged adjacent to the first electrode inside at least one of the seating portion and the backrest portion of the seat, whatever the first electrode is arranged. The second electrode forms an electric field together with the first electrode between them in a wetness determination mode in which a wet condition of the seat is determined. The third electrode forms an electric field together with the first and the second electrode between them in an occupant determination mode in which an occupant in the seat is determined.