摘要:
A liquid crystal display device significantly reduces power consumption and causes no signal delay when a liquid crystal panel performs an inversion-type drive. The liquid crystal display device comprises a digital controller, a level shift circuit, a digital-to-analog (D/A) converter, a liquid crystal panel, and a plurality of capacitors. In the D/A converter, a charging control circuit is provided corresponding to each capacitor. The charging control circuit comprises a switch, a diode and an inverter, the switch and the diode being coupled in parallel. The switch is turned on and off in response to a switching signal from the digital controller. The switch is changed to a turning- on state during a blanking period after one horizontal displaying. Upon turning-on of the switch, the capacitors are charged. Digital pixel data outputted from the digital controller undergoes a level changing depending on a voltage across the electrodes of the capacitors, according to a charge conservation.
摘要:
An ink-jet recording apparatus records an image onto a recording medium by flying an ink-droplet from an ink surface by a pressure of an ultrasonic beam. The apparatus including an ultrasonic generating element array having a plurality of ultrasonic elements arranged in an array for emitting ultrasonic beams, a driving device for applying a plurality of pulses having different phases from each other, and a converging device for converging the ultrasonic beams by interfering the ultrasonic beams with each other. The generating elements are simultaneously driven and sequentially shifted in an array direction, and the converging device converging the ultrasonic beams in a direction perpendicular to the array direction.
摘要:
An A/D converter apparatus comprising a negative feedback loop having a main signal line supplied with an input signal of a predetermined frequency and a feedback signal line passing through a feedback signal, a A/D converter connected to the main signal line for frequency-converting the input signal to a signal having a frequency different from that of the input signal to output a converted signal, a D/A converter connected to the feedback signal line for frequency-converting the feedback signal to a signal having a frequency substantially equal to that of the input signal, and a subtracter for subtracting the feedback signal from the D/A converter from the input signal to supply a subtraction result signal to the A/D converter.
摘要翻译:一种A / D转换器装置,包括:负反馈回路,其具有提供有预定频率的输入信号的主信号线和通过反馈信号的反馈信号线; A / D转换器,连接到主信号线, 将输入信号转换成具有与输入信号的频率不同的频率的信号以输出转换的信号; D / A转换器,连接到反馈信号线,用于将反馈信号频率转换成具有基本上等于 以及减法器,用于从输入信号中减去D / A转换器的反馈信号,以向A / D转换器提供减法结果信号。
摘要:
A source driver circuit device for decreasing a gap of output errors of a plurality of driver circuits which perform a serial/parallel conversion of a video signal, comprises a plurality of sample-and-hold circuits arranged in the order for sequentially sampling levels of an input video signal; a plurality of signal output circuits for respectively generating voltage outputs corresponding to holding levels of said plurality of sample-and-hold circuits; a plurality of reference level sample-and-hold circuits each of which is provided with each predetermined number of said sample-and-hold circuits, and for sampling a reference level; a plurality of sample value output circuits for respectively generating voltage outputs corresponding to holding levels of said plurality of reference level sample-and-hold circuits; and an output error correction circuit for performing an output level correction in each of said plurality of signal output circuits on the basis of a level difference between said reference level and an average value of a plurality of outputs issued from said plurality of sample value output circuits. Therefore, it is possible to decrease the level difference between output errors among the driver circuit device.
摘要:
A capacitative load driving circuit is provided in a liquid crystal display device and has an input selection circuit having a wide and effective voltage range of an input signal. The driving circuit changes over through source or emitter followers formed by two types of conductivity, for detecting as to whether or not a potential of the input signal is in an input voltage range of a differential amplifier circuit constituting a voltage follower after selecting at least one input signal through any of source or emitter followers.
摘要:
A sample-and-hold circuit device includes a plurality of sampling field effect transistors for sampling an input signal in response to sampling pulses sequentially supplied from a sampling pulse transferring section, a plurality of charge-holding capacitors for respectively holding signal charges sampled by the sampling field effect transistors, and a plurality of compensating field effect transistors each having source and drain electrodes connected to a corresponding one of the charge-holding capacitors to save excess charges accumulatively stored together with signal charges in the charge-holding capacitors, wherein there is provided a pulse applying circuit for applying a driving pulse, which is obtained by inverting a sampling pulse applied to the gate of the sampling field effect transistor of one of the succeeding-stage sample-and-hold circuits, to the gate of the compensating field effect transistor of each sample-and-hold circuit.
摘要:
An embodied ADC includes a sampling unit sampling differential input signal to output differential sampled signal which has first and second sampled signals. The ADC includes a reference signal generator generating first and second reference signals and a preamplifier amplifying the differential sampled signal to output a differential amplification signal having first and second amplified outputs. The preamplifier has a first differential amplifier amplifying the first sampled signal using the first reference signal and a second differential amplifier amplifying the second sampled signal using the second reference signal. The ADC includes a comparator comparing the first and second amplified outputs and a correction controller controlling common-mode voltage levels of the first and second reference signals or common-mode voltage levels of the first and second sampled signals in accordance with the operations of the first and second differential amplifiers.
摘要:
An assembled battery system includes an assembled battery including a plurality of electric cell blocks connected in series, the electric cell blocks each including at least one nonaqueous electrolyte secondary battery provided with a negative electrode current collector formed of aluminum or an aluminum alloy, a voltage measuring unit configured to measure a plurality of voltages of the electric cell blocks, a controller which controls charge/discharge of the assembled battery in accordance with the measured voltages, and bypass circuits connected in parallel to the electric cell blocks, the bypass circuits each bypassing a current that flows from a negative electrode of one of the electric cell blocks to a positive electrode of the one of electric cell blocks when the measured voltage of the one of electric cell blocks is a negative value not greater than a threshold value.
摘要:
First and second resistor series divide a predetermined voltage range to generate first reference voltages and second reference voltages, respectively. First and second switch controlling circuits select respective ones of the first reference voltages and the second reference voltages. A comparing unit generates a logical signal representing a logical value by comparing a combined transistor current based on the selected first and second reference voltages with a transistor current based on an input signal. The first switch controlling circuit specifies two adjacent first reference voltages where the logical value is inverted by sequentially selecting the first reference voltages, and determines to select one of the adjacent reference voltages. Te second switch controlling circuit specifies two adjacent second reference voltages where the logical value is inverted by sequentially selecting the second reference voltages, and determines to select one of the adjacent reference voltages.
摘要:
This A/D convertor includes: a first D/A conversion unit configured to sample an analog input signal, and to generate a first difference signal by performing successive comparison of the analog input signal based on a reference voltage; a precharge capacitor unit configured to hold the reference voltage; a first comparing unit configured to compare the first difference signal with a reference value to generate a first digital signal; and an amplifying unit configured to calculate by using the first difference signal and the reference voltage to generate a residual signal.