Abstract: An operational amplifier includes a differential amplifier, an output stage, and a control unit. The differential amplifier generates a first current through a first output node and a second current through a second output node in response to a voltage difference between a first input signal input through a first input terminal and a second input signal input through a second input terminal. The output stage generates an output signal through an output node. The control unit receives a voltage of the first output node and a voltage of the second output node, as bias voltages, and controls an output current of the output stage to determine the output signal of the output stage in response to the received voltages of the first and second output nodes.

Abstract: An apparatus for generating a VCOM voltage in a display device includes first and second buffer amplifiers and a charge pump. The first buffer amplifier is biased with high and low rail voltages for generating the VCOM voltage. The second buffer amplifier generates the high rail voltage at an output node not connected to an external capacitor. The charge pump generates the low rail voltage by charge pumping directly from an external power supply voltage. Alternatively, a charge pump and a comparator are used for generating the VCOM voltage at an output of the charge pump. The comparator generates a charge pump control signal from comparing the VCOM voltage with a reference voltage.

Abstract: The present invention relates to a 5-(1,3-diaryl-1H-pyrazol-4-ylmethylene)-thiazolidine-2,4-dione derivative or its pharmaceutically acceptable salts thereof, a method for preparing the same and an anticancer agent composition comprising the same as an active ingredient.

Abstract: An adaptive biasing input stage includes pairs of differentially coupled amplifying and sensing field effect transistors having gates with differential inputs applied thereon. In addition, a static current source is coupled to sources of the amplifying and sensing field effect transistors at a predetermined node. Also, current mirrors are coupled to the sensing field effect transistors for forming loop mechanisms for increasing the current through the predetermined node when the differential inputs have a non-zero difference.

Abstract: A fully differential amplifier includes a first single-ended current mirror type fully differential amplifier outputting a first output signal by two stage amplifying a difference between a first input signal and a second input signal and a second single-ended current mirror type fully differential amplifier outputting a second output signal by two stage amplifying a difference between the first input signal and the second input signal. A first tail of the first single-ended current mirror type fully differential amplifier and a second tail of the second single-ended current mirror type fully differential amplifier are connected to each other and the first output signal and the second output signal are differential signals.

Abstract: A super twisted nematic (STN) liquid crystal display (LCD) driver and a driving method thereof includes a sub frame counter that counts the number of sub frames in response to a clock signal and generates a sub frame flag signal when each sub frame is counted. An N clock counter receives an N-line signal and generates an N-line flag signal when the number of N-line counted is N in response to the clock signal. A frame counter receives a frame rate control (FRC) selection signal, counts the number of the sub frame flag signal, and generates a frame flag signal when the number of the sub frame flag signal counted is n. A liquid crystal polarity inversion signal generator receives one of the sub frame flag signal, the N-line flag signal, and the frame flag signal in response to a selection signal, and generates a liquid crystal polarity inversion signal.

Abstract: A method of controlling backlighting of a Liquid Crystal Display (LCD) can include generating an on-time signal to activate a backlight for an LCD in synchronization with providing a frame of data to the LCD.

Abstract: A display driving apparatus and method adjusts output gray voltage levels applied to a display driving apparatus that converts input data into a corresponding output voltage and displays an image. The driving method includes generating a plurality of gray voltages N times more than the number of output gray voltages representing voltages between a maximum value and a minimum value of the output voltage required to represent the input data as the image; selecting a plurality of output gray voltages required to represent the image, from among the gray voltages N times more than the output gray levels, in response to a selection signal; and decoding the input data using the selected output gray voltages and generating the output voltage. The display driving apparatus and method reduce distortion of an output image without increasing the size of the entire circuit.

Abstract: A highly efficient LCD driving voltage generating circuit and method consumes a relatively small amount of power, as compared to conventional means. The LCD driving voltage generating circuit comprises a DC-DC converter for boosting an input voltage in response to a clock signal and for outputting the boosted voltage as a first driving voltage; a voltage controlled oscillator for generating the clock signal at a frequency that changes in response to the level of a control voltage; and a control voltage generator for generating the control voltage in response to the difference between a reference voltage and a feedback voltage derived from the first driving voltage. In this manner, as the feedback voltage becomes lower than a reference voltage, the frequency of the clock signal input into a DC-DC converter increases.

Abstract: Provided are a power consumption controlled boosting apparatus, a power-boosting system that determines boosting according to an amount of power consumption using a small number of capacitors, and a power-boosting method. The power-boosting system generates a boosting voltage without using a voltage regulating circuit and determines boosting according to the amount of power consumption.

Abstract: A highly efficient LCD driving voltage generating circuit and method consumes a relatively small amount of power, as compared to conventional means. The LCD driving voltage generating circuit comprises a DC-DC converter for boosting an input voltage in response to a clock signal and for outputting the boosted voltage as a first driving voltage; a voltage controlled oscillator for generating the clock signal at a frequency that changes in response to the level of a control voltage; and a control voltage generator for generating the control voltage in response to the difference between a reference voltage and a feedback voltage derived from the first driving voltage. In this manner, as the feedback voltage becomes lower than a reference voltage, the frequency of the clock signal input into a DC-DC converter increases.

Abstract: A voltage boosting circuit, boosting power supply unit and methods thereof are provided. A boosting power supply unit includes a boosting circuit having a small number of externally-mounted capacitors, which generates stepped-up and stepped-down boosted voltages through charging and pumping under two-phase control, so that the simultaneous output of the stepped-up voltage and the stepped-down voltage, the output of only the stepped-up voltage, the output of only the stepped-down voltage, and the cut-off of the output of the stepped-up voltage and the stepped-down voltage can be controlled on the basis of the phase control signal generated from the enable signals of which the logic states are changed in accordance with an amount of load.

Abstract: A gamma correction device and method thereof is described herein, in which gray-scale voltages may be generated that correspond with a plurality of gamma values. The gray-scale voltages may be generated by adjusting output ranges of the gray-scale voltages while fixing a gamma correction voltage on a constant level. The gamma correction device may include a gamma correction voltage generator generating a plurality of gamma correction voltages corresponding to a reference gamma value; a gray-scale voltage generation circuit dividing the gamma correction voltages to generate a plurality of sub gray-scale voltage sets each of which includes a sub gray-scale voltage corresponding to each gamma value; and a gray-scale voltage selection circuit outputting one of the sub gray-scale voltages of each sub gray-scale voltage set as a gray-scale voltage.

Abstract: A voltage boosting circuit, boosting power supply unit and methods thereof are provided. A boosting power supply unit includes a boosting circuit having a small number of externally-mounted capacitors, which generates stepped-up and stepped-down boosted voltages through charging and pumping under two-phase control, so that the simultaneous output of the stepped-up voltage and the stepped-down voltage, the output of only the stepped-up voltage, the output of only the stepped-down voltage, and the cut-off of the output of the stepped-up voltage and the stepped-down voltage can be controlled on the basis of the phase control signal generated from the enable signals of which the logic states are changed in accordance with an amount of load.

Abstract: A highly efficient LCD driving voltage generating circuit and method consumes a relatively small amount of power, as compared to conventional means. The LCD driving voltage generating circuit comprises a DC-DC converter for boosting an input voltage in response to a clock signal and for outputting the boosted voltage as a first driving voltage; a voltage controlled oscillator for generating the clock signal at a frequency that changes in response to the level of a control voltage; and a control voltage generator for generating the control voltage in response to the difference between a reference voltage and a feedback voltage derived from the first driving voltage. In this manner, as the feedback voltage becomes lower than a reference voltage, the frequency of the clock signal input into a DC-DC converter increases.

Abstract: Provided is a display device of a mobile phone with a sub memory. The display device includes a display panel for displaying application data and state display data corresponding to a main image data signal used to display various application data and a sub image data signal including state display data and picture control signals, a sub memory for storing state display data and picture control signals for outputting state display data and picture control signals to the display panel, and a display driver which drives images or data to be displayed on the display panel.

Abstract: A voltage boosting circuit, boosting power supply unit and methods thereof are provided. A boosting power supply unit includes a boosting circuit having a small number of externally-mounted capacitors, which generates stepped-up and stepped-down boosted voltages through charging and pumping under two-phase control, so that the simultaneous output of the stepped-up voltage and the stepped-down voltage, the output of only the stepped-up voltage, the output of only the stepped-down voltage, and the cut-off of the output of the stepped-up voltage and the stepped-down voltage can be controlled on the basis of the phase control signal generated from the enable signals of which the logic states are changed in accordance with an amount of load.

Abstract: Provided are a power consumption controlled boosting apparatus, a power-boosting system that determines boosting according to an amount of power consumption using a small number of capacitors, and a power-boosting method. The power-boosting system generates a boosting voltage without using a voltage regulating circuit and determines boosting according to the amount of power consumption.

Abstract: A voltage boosting circuit, boosting power supply unit and methods thereof are provided. A boosting power supply unit includes a boosting circuit having a small number of externally-mounted capacitors, which generates stepped-up and stepped-down boosted voltages through charging and pumping under two-phase control, so that the simultaneous output of the stepped-up voltage and the stepped-down voltage, the output of only the stepped-up voltage, the output of only the stepped-down voltage, and the cut-off of the output of the stepped-up voltage and the stepped-down voltage can be controlled on the basis of the phase control signal generated from the enable signals of which the logic states are changed in accordance with an amount of load.

Abstract: The present invention provided with novel 5-benzyloxymethyl-1,2-isoxazoline derivatives of the formula (1), their preparation method and their use as herbicides. The 5-benzyloxymethyl-1,2-isoxazoline derivatives according to the present invention have sufficiently high herbicidal activity against the weeds in the paddy field rice even at low dose rates and excellent selectivity to transferred rice in particular. As thus, the compounds of the present invention are typically useful as herbicides for control of paddy weeds in rice.