摘要:
In a plasma display device having a reduced discharge-current-induced voltage fluctuation and an expanded drive margin and being successful in preventing the display characteristics from being degraded, a Y-electrode drive circuit and an X-electrode drive circuit for supplying a drive voltage to the capacitance which represents a display cell are configured using parallel circuits in which first switching elements having a high-speed-switching performance and second switching elements having a low-saturation-voltage performance are connected in parallel, so that the second switching elements having the low-saturation-voltage performance are turned on at least during a period that discharge current flows therebetween.
摘要:
An ALIS system PDP apparatus in which a reduction in the variation in luminance due to ringing has been reduced is disclosed. In an ALIS system PDP apparatus, X (first) electrodes and Y (second) electrodes are arranged in such a way that the X electrodes and the Y electrodes, whose path length, which is the length of each of the signal paths of a sustain discharge pulse from the X and Y electrode to sustain drive circuits, is longer or shorter than that of the peripheral X and Y electrodes, do not exist densely. Specifically, the order of arrangement of the odd and even X sustain drive circuits is reversed to that of odd and even Y sustain drive circuits.
摘要:
A drive circuit, for a display apparatus, capable of preventing the occurrence of malfunctions, when the power is turned on, and the destruction of an output device. The drive circuit comprises an edge pulse generation circuit for generating a front edge pulse and a back edge pulse of an input signal, a first level shift circuit for converting the front edge pulse, a second level shift circuit for converting the back edge pulse, a logic circuit, a flip-flop circuit, a setup resistor connected to a signal line in the flip-flop circuit or in the post stage of the flip-flop circuit, an output amplifier circuit connected to the post stage of the setup resistor, and an output device connected to the output amplifier circuit, wherein a capacitive load of the display apparatus is driven by the output device and the setup resistor is connected between the power supply signal line of the output amplifier circuit and the signal line.
摘要:
A capacitive load circuit and a plasma display apparatus using such a circuit, being able to use a sustain transistor having a voltage rating in accordance with a sustain voltage even when a voltage larger than the sustain voltage is applied to a sustain electrode, have been disclosed, wherein a switch whose one end is connected to a capacitive load is comprised and when a third voltage, whose voltage difference from a second voltage is larger than the voltage difference between a first voltage and the second voltage, is applied to the capacitive load, a fourth voltage is selectively applied to the other end of the switch.
摘要:
The color reproduction correction circuit which corrects the color distortion caused when color signals using the first combination of the three primary colors are reproduced in a color display of the second combination of the different primary color sources has been disclosed, wherein: a provided color correction circuit generates the mixed color signal by multiplying the color signal in question by the specified coefficients and adding the mixed color signal to other color signals; the mixed colors in the second combination are used as primary color light sources in the second combination; the specified coefficients are determined so that these mixed color light sources are made close to the coordinates of the primary color light sources of the first combination; and the luminescent chromaticity values of the three primary colors are corrected so that the chromaticity values of the device match those specified by the signal system.
摘要:
The plasma display device includes connecting means for connecting the X/Y electrodes of the plasma display panel and the X/Y electrode drive circuits. In the X electrode pattern and the Y electrode pattern on the printed board in the connecting means, a current path connecting the center electrodes of the plasma display panel and the X electrode drive circuit or Y electrode drive circuit is longer than a current path connecting the peripheral electrodes and the X electrode drive circuit or Y electrode drive circuit. The current paths at the plasma display panel side are in the U-shape folded in the upper part and the lower part in the periphery of the plasma display panel, respectively. Also, the current paths are first connected to the upper or lower electrodes, and then sequentially connected to the center electrodes via the upper part and the lower part.
摘要:
A flat panel display device includes switching elements QA3 and QA4, respectively connected to a voltage Vs and ground to be applied to a panel capacitance Cp when performing light emission relating to image display, for clamping the voltage of the panel capacitance; coils LA1 and LA2 each having one end connected to the panel capacitance; a path separation circuit DLA1 and DLA2, connected to the other ends of the coils, for separating paths through which charge/discharge currents flow; a switching element QA1 connected between the voltage Vs and the path separation circuit; a switching element QA2 connected between the ground and the path separation circuit; and diodes connected in parallel to the switching elements, in which the resonance reference voltage relating to a power recovery operation is set to a maximum voltage and a minimum voltage to be applied to the panel capacitance, and the paths through which the charge/discharge currents flow are separated to thereby improve the recovery efficiency in a power recovery circuit and enable realization of stable image display operation.
摘要:
A display device that can prevent the thermal destruction and screen burn-in caused by display patterns has been disclosed. In this device, the display luminance is determined by the number of light emissions, and there are provided a sustain frequency control section that controls the sustain frequency, a load ratio calculation section that calculates the load ratio for each frame of display data, plural counters, a load ratio counter control section that controls so as to increase the counts of the counters corresponding to the load ratio level calculated by the load ratio calculation section, and a first judgment section that outputs a first control signal when any of the counts exceeds a first reference value, wherein the sustain frequency control section decreases the sustain frequency according to the first control signal.
摘要:
A driving method and a PDP apparatus of a dot-matrix type PDP, in which a display of high-luminance and high-quality can be obtained when driven by the interlacing method, have been disclosed. In the driving method to drive, using the interlacing method, a dot matrix type AC plasma display panel comprising display electrodes that are arranged adjacently, extend in the same direction, and execute a light-emitting action in each display cell, and a rib that separates individual display cells, wherein a display line is formed between every pair of the display electrodes, the data in a line of the interlaced signal is displayed simultaneously in two neighboring lines and the centers of display are shifted in the odd field and the even field.
摘要:
The color reproduction correction circuit which corrects the color distortion caused when color signals using the first combination of the three primary colors are reproduced in a color display of the second combination of the different primary color sources has been disclosed, wherein: a provided color correction circuit generates the mixed color signal by multiplying the color signal in question by the specified coefficients and adding the mixed color signal to other color signals; the mixed colors in the second combination are used as primary color light sources in the second combination; the specified coefficients are determined so that these mixed color light sources are made close to the coordinates of the primary color light sources of the first combination; and the luminescent chromaticity values of the three primary colors are corrected so that the chromaticity values of the device match those specified by the signal system.