摘要:
A charging/discharging apparatus (602) for charging a capacitance to be charged/discharged (Cp) includes: a recovery capacitor (Cr1) for recovering electric energy which has one terminal connected to a first power supply (GND) through first switch means (SW11) and another terminal connected to a second power supply (Vs+Vo) through second switch means (SW12); first path forming means (D11) which has one terminal connected to a connection point between the second power supply and the other terminal of the recovery capacitor and another terminal connected to the capacitance to be charged/discharged, and charges the capacitance to be charged/discharged through a resonant inductor (L1) when the first switch means is turned on; second path forming means (D12) which has one terminal connected to a connection point between the first power supply and the one terminal of the recovery capacitor and another terminal connected to the capacitance to be charged/discharged, and discharges the capacitance to be charged/discharged through the resonant inductor (L1) when the second switch means is turned on to recover electric energy to the recovery capacitor.
摘要:
A plasma display panel includes a pair of substrates forming a discharge space between the substrates, and lateral barrier ribs extending in a row direction and longitudinal barrier ribs extending in a column direction that divide the discharge space into cells. Each lateral barrier rib is divided into two portions in the column direction such that a vent passage is formed in the divided portion. In the plasma display panel, raised portions, which are lower than the lateral barrier ribs and connect the lateral barrier ribs divided into the two portions with each other, are formed in the vent passage.
摘要:
A method for driving an AC type plasma display panel includes the steps of performing initialization at least once for each frame so as to clear binary setting of wall charge quantity in a screen by discharge except for micro discharge in which electrodes covered with a plurality of fluorescent materials become cathodes, and performing special initialization at frequency of once for M frames, where M=two or more, so as to erase unnecessary wall charge in the screen by discharge in which electrodes become cathodes and that is stronger than the discharge in the initialization.
摘要:
A charging/discharging apparatus (602) for charging a capacitance to be charged/discharged (Cp) includes: a recovery capacitor (Cr1) for recovering electric energy which has one terminal connected to a first power supply (GND) through first switch means (SW11) and another terminal connected to a second power supply (Vs+Vo) through second switch means (SW12); first path forming means (D11) which has one terminal connected to a connection point between the second power supply and the other terminal of the recovery capacitor and another terminal connected to the capacitance to be charged/discharged, and charges the capacitance to be charged/discharged through a resonant inductor (L1) when the first switch means is turned on; second path forming means (D12) which has one terminal connected to a connection point between the first power supply and the one terminal of the recovery capacitor and another terminal connected to the capacitance to be charged/discharged, and discharges the capacitance to be charged/discharged through the resonant inductor (L1) when the second switch means is turned on to recover electric energy to the recovery capacitor.
摘要:
On a front substrate, a dielectric layer for accumulating the wall charge is formed, and inside the dielectric layer, a first electrode and a second electrode intersecting each other are formed with a predetermined pitch. The dielectric layer is not flat but is convex at the intersection of the first electrode and the second electrode, and the thickness in the direction of the discharge space from the second electrode at the intersection is larger than the thickness in the remaining area. Consequently, since the electric field distribution at the intersection is coarser than that at places apart from the intersection when discharge is sustained by causing an electric field distribution in the discharge space through the dielectric layer, discharge occurs not at the intersection but in four positions at places apart from the intersection, so that the luminous efficiency per discharge cell is improved.
摘要:
A sustain voltage applying circuit includes a circuit having a sustain pulse generating circuit for generating a sustain pulse of a predetermined waveform and an offset pulse generating circuit for generating an offset pulse higher in peak value than the sustain pulse, the sustain pulse generating circuit and the offset pulse generating circuit being connected in parallel, the offset pulse generating circuit including a first voltage source, a first switching circuit, an inductance component for generating a resonance voltage for the offset pulse generation, and a forward diode for permitting a current supplied to the display electrodes to flow forward so that the resonance voltage is maintained at a higher voltage level than a voltage level of a sustain voltage for a predetermined period of time, the sustain pulse generating circuit including a second voltage and a second switching circuit.
摘要:
Disclosed is an optical unit for an image display device, the unit including: one or a plurality of light sources; one or a plurality of optical elements that control a spread of light; a combining element that combines the beams of light emitted from the light sources; and a scanning element, wherein the light from each of the light sources generates an elliptical beam spot on a screen and the spot has a major axis substantially perpendicular to a scanning direction, the result is that the unit is simple in structure, inexpensive, compact, lightweight, and capable of providing high-resolution image quality, thus providing the display device reduced dimensionally and in weight. Such an image display device using the optical unit is also disclosed.
摘要:
A laser projector for scanning a laser beam output by a multimode laser light source and displaying an image includes a laser driving unit to drive the multimode laser light source so that two-dimensional output patterns of a shape of the laser beam are different in each display frame. The laser driving unit applies to the multimode laser light source a driving waveform pattern which has the same product of an output intensity and output time of a laser light source during a display time of one dot and which includes an output intensity and output time different in each display frame.
摘要:
A plasma display device performing display control by utilizing plasma discharge includes a panel having a plurality of address electrodes and a plurality of display electrodes disposed to intersect with the address electrodes, and a drive circuit performing address discharge drive for selectively producing a discharge in cells between the address electrodes and the display electrodes, and display discharge drive for applying to the display electrode a display drive pulse having a voltage increasing with such a gradient as to continuously produce a discharge current in the selected cell. In the display discharge drive performed after the address discharge drive, a display drive pulse with an increasing voltage of gentle gradient is applied to the display electrode, thereby producing faint discharges continuously in the selected cell during the increase of the voltage applied to the display electrode. Display luminance is controlled by the above ramp-wave discharge. In such the ramp-wave discharge, differently from the conventional strong discharge, faint discharges are produced a plurality of times while the display drive pulse is being applied, enabling improvement on the discharge efficiency, and reduction of power consumption.
摘要:
A display device (1) including a surface discharge type plasma display panel (2) performs an addressing operation, a sustain operation and a reset operation. In the addressing operation, address discharge of an opposed discharge form with the second electrode (Y) used as a cathode is generated between the second electrode (Y) and a third electrode (A) in a cell to be energized or in a cell not to be energized. In the reset operation, an obtuse wave pulse (Pr1) having a negative polarity is applied to the second electrode (Y) so as to generate charge adjustment discharge starting from discharge of the opposed discharge form with the second electrode (Y) used as a cathode between the second electrode (Y) and the third electrode (A).