摘要:
An electrode drive circuit performs interlaced scanning, ensuring that the phases of the sustaining pulse in odd-numbered lines and even-numbered lines among L1 to L8 between surface discharge electrodes are the reverse of each other. With this, when either odd-numbered lines or even-numbered lines are displayed, the voltages applied between the electrodes of the undisplayed lines are at 0, eliminating the necessity for partitioning walls on the surface discharge electrodes. In surface discharge electrodes, X electrodes are provided on the two sides of a Y electrode and the area between the Y electrode and the X electrode on one side is assigned a display line at an odd-numbered frame, and the area between the Y electrode and the X electrode on the other side is assigned a display line in an even-numbered frame. Alternate areas between the surface discharge electrodes are assigned as blind lines and a discharge light emission in the blind lines is blocked or incident light to the blind lines from the outside is absorbed. Address electrodes are provided for each monochromatic pixel column and selectively connected with the pads above them, performing simultaneous selection of lines.
摘要:
A plasma display panel and driving method thereof perform addressing at a high speed and a low voltage without deteriorating contrast. Priming electrodes forming priming cells are located outside but adjacent a display area. Glow occurring in the priming cells is intercepted. When priming discharge is induced at a reset step, voltages lower than a discharge start voltage are applied to first (X) and second (Y) electrodes and third (address) electrodes respectively. Despite the voltages being lower than the discharge start voltage, once discharge is induced in the priming cells, discharge starts in adjoining cells. The discharge then spreads successively over all the cells, thus inducing discharge in all the cells. Consequently, wall charge is produced in all the cells.
摘要:
A semiconductor delay circuit device comprises a pair of transistors of the same conduction type having source regions that are arranged adjacent to each other and facing each other, and a substrate contact diffusion region whose conduction type is opposite to that of the source regions. The substrate contact diffusion region extends between the source regions. Therefore, the source regions of the transistors do not influence each other.
摘要:
Noise pulses having both polarities which are superposed on an input signal having a binary state of H/L levels forming a rectangular waveform, are suppressed or eliminated before transferring the input signal to an output stage. A noise pulse suppressing circuit is provided which comprises a latch circuit, a counter circuit, and a logic circuit including NAND gates and INVERTERs. For the latch circuit and the counter circuit, D-type flip-flops are also utilized. The input signal is inputted to a data input terminal of a flip-flop of the latch circuit and outputted from the data output terminal thereof. The latch circuits are triggered by a pulse signal applied to a clock terminal thereof. The above triggering pulse signal is generated by the counter circuit and the logic circuit, and it has a short pulse waveform responding to the input signal but delayed. No pulse in the output is produced which corresponds to the noise pulses in the input signal.
摘要:
As is obvious from the description in the specification and the attached drawings, the present invention provides a display apparatus for displaying an image on a display panel by turning on pixels of said display panel, said display apparatus comprising: a display panel provided with: address electrodes driven by address pulses based on a video input signal; and sustain electrodes crossing said address electrodes and sandwiching electrical discharging units of pixels with said address electrodes and driven by sustain pulses; a sustain-electrode drive circuit for generating said sustain pulses and scan pulses, provided with a common circuit for generating said sustain pulses or said scan pulses in response to an operating state thereof and for supplying said scan pulses and said sustain pulses to said sustain electrodes.
摘要:
A phase comparison circuit includes phase comparison device for generating an output signal corresponding to the difference in phase between a first input signal and a second input signal. The phase comparison device has an active mode, and a standby mode in which power consumption is reduced. A phase-difference detecting device is connected to the phase comparison device for outputting a control signal when the phase difference between the first and second input signals is smaller than a predetermined value. The phase comparison device is switched from the standby mode to the active mode in response to the control signal.
摘要:
A synchronous separation circuit used in a television video circuit for generating a horizontal synchronizing signal and a vertical synchronizing signal from a composite synchronizing signal has: a unit for generating a clock signal used as a reference signal and having a frequency higher than the frequency of the horizontal synchronizing signal; a unit for counting the clock signal from a front edge of a pulse contained in the composite synchronizing signal; a unit for obtaining a horizontal synchronous separation and for determining a counting term and outputting the horizontal synchronizing signal after the counting unit counts from the front edge of the horizontal synchronizing signal to a predetermined number; and a unit for obtaining a vertical synchronous separation and for latching the composite synchronizing signal based on an output of the counting unit, separate the vertical synchronizing signal from the composite synchronizing signal.
摘要:
A phase comparator circuit for comparing a phase of a first input signal with a second input signal and outputting a first output signal and a second output signal in accordance with a result of the comparison, and comprising two flip-flop circuits and a latch circuit, whereby, when the first and second input signals are in-phase, both first and second output signals are output.
摘要:
A phase-locked loop circuit comprising a reference oscillator (1), a reference frequency divider (2) for dividing the output signal of the reference oscillator, a programmable frequency divider (3), a phase comparator (4) for monitoring the difference in phase between the output signal of the two frequency dividers, a lock detector (11) for generating a first signal which is pulse-shaped or rectangular when the above-mentioned difference in phase is generated, and a digital signal maintaining circuit (100) for converting the first signal into a second directed current signal.
摘要:
A display apparatus includes a display panel including address electrodes and sustain electrodes crossing the address electrodes, with pixels being sandwiched between the address electrodes and the sustain electrodes. A sustain-electrode drive circuit selectively generates both sustain pulses and scan pulses and supplies them to the sustain electrodes. An address-electrode drive circuit generates address pulses based on a video signal and supplies the address pulses to the address electrodes. A control-signal generation circuit generates a control signal for controlling the sustain-electrode drive circuit to generate a selected one of the sustain pulses and the scan pulses and supplies the control signal to the sustain-electrode drive circuit. In order to display an image on the display panel, the sustain-electrode drive circuit both specifies addresses of pixels to be turned on and turns on the pixels at the specified addresses.