Abstract: Provided is a plasma display apparatus capable of reducing power consumption by effectively using charges charged in a plasma display panel and achieving a high luminance by a reduction in reactive power. This plasma display apparatus includes: a plasma display panel in which X electrodes, Y electrodes, and Z electrodes are disposed on a front substrate and address electrodes are disposed on a rear substrate; and an X drive circuit, a Y drive circuit, a Z drive circuit and an address drive circuit for performing discharge light emission by applying a Z pulse between the Z electrode and the X electrode or between the Z electrode and the Y electrode and applying an X (Y) pulse between the X electrode and the Y electrode. The Z drive circuit includes a coil and switches using an LC resonance operation with the capacitance of the plasma display panel, and the Z pulse having a narrow pulse width can be generated by generating a Z pulse in the Z drive circuit.

Abstract: A method and an apparatus for driving a plasma display in which supply of a driving waveform to the non-lighting display line of a plasma display screen is stopped while preventing level difference in luminance or instability of operational margin incident to stoppage of driving waveform supply. In the inventive plasma display, a sustain waveform is created and supplied to each display line of the plasma display, and supply of the sustain waveform is stopped for such a display line as no cell is lighted at all in a unit of sub-field thus quickening the clamp period of sustain waveform by using an inductance having an increased L value and shortening the sustain cycle.

Abstract: In this PDP apparatus, in a sustain driving circuit device for supplying sustain discharge pulses, an energy recovery circuit has a coil, switches, and diodes, and a Vs clamp circuit has switches. In the energy recovery circuit, the switches are connected to a panel capacitor, and the coil is connected to a power source line with an intermediate potential of Vs, and a clamp diode and a power source connected thereto are connected to a node between the coil and the switch. As a control timing, at a timing of less than ?/2 of an LC resonance current cycle, the switch of the energy recovery circuit is turned OFF and then the switch of the Vs clamp circuit is turned ON, thereby performing the Vs clamp.

Abstract: A method for driving a plasma display panel is provided in which wasteful power consumption is reduced and light emission efficiency is improved when the number of cells to be lighted is relatively small. The method includes classifying a display ratio into plural group ranges, selecting a suitable display pulse waveform for each group range, detecting the display ratio of an object to be displayed in a real display, and plural types of display pulses having different waveforms are used differently in accordance with the result of the detection. The display ratio means a ratio of the number of cells to be lighted to the number of cells of the screen.

Abstract: An optical component bowing device is configured to include a bending moment generating structure that generates a bending moment in a supported portion of an optical component that reflects or shapes a light beam.

Abstract: A first and a second signal line respectively supplying a first potential and a second potential to one end of a capacitive load, a waveform output circuit whose input terminal is connected to a supply line supplying a third potential, whose output terminal is connected to the first or the second signal line, and whose control terminal is connected to a waveform generating circuit, and a reactive current preventing switch connected between the control terminal and the output terminal or the input terminal of the waveform output circuit are provided. During a period when a reactive current is prevented from flowing, the reactive current preventing switch is bought into conduction to make a potential difference between the control terminal and the output terminal of the waveform output circuit smaller so that the waveform output circuit cannot be operated, which prevents the reactive current from flowing, leading to an improvement in the reliability of a driving circuit.

Abstract: In a PDP apparatus provided with a PDP having (X, Y, A) and various drivers, two adjacent Ys in a plurality of Ys are commonly connected by a wiring so as to form one set unit, in the vicinity of a connection portion of the PDP and the drivers. A two-stage reset and address operation control using a reset operation including an address disable operation is used for a control unit including a plurality of display lines (L) of the set units. In a plurality of Ls as objects of drive display, the reset and address operation of first Ls (Lo) corresponding to Ys on one side of set units and that of second Ls (Le) corresponding to Ys on the other side thereof are performed separately in former and latter periods, and then, sustain operations of the first and second Ls on both sides are performed simultaneously.

Abstract: A first signal line for supplying a potential to one terminal of a capacitive load, a first switch element for supplying a first potential to the first signal line, a first drive circuit for driving the first switch element, and a second signal line for supplying a second potential different from the aforesaid first potential to the one terminal of the capacitive load are included. A first capacitor is capable of supplying a lower potential than the first and the third potentials to the first signal line. A coil circuit is connected between the first signal line or the second signal line and a supply line for supplying the third potential. A floating power supply circuit supplies power supply voltage with a potential of the first signal line as a reference to the first drive circuit.

Abstract: A ramp waveform generation circuit for generating a ramp waveform to be applied to a capacitive load serving as a display element is connected between the ground and a signal line for supplying a high-level voltage generated by a power supply circuit for generating a voltage to be applied to the capacitive load, thereby operating the ramp waveform generation circuit with reference to the ground potential. Hence, without using a plurality of power supply circuits or a signal transmission circuit for converting the reference potential of a control signal for the ramp waveform generation circuit, a stable ramp waveform can be output with a simple circuit arrangement.

Abstract: There is provided a plasma display device capable of high luminous efficacy and stable driving for displaying images at various image display load factors. The plasma display device performs the sustain discharge for a light-emission display, and is configured to apply a sustain pulse voltage between a sustain electrode pair in a respective one of the plural discharge cells to generate a sustain discharge in a respective one of the following operating modes selected based upon use of the plasma display device: (a) generating a pre-discharge and then a main discharge; (b) generating a main discharge without a pre-discharge preceding the main discharge; and (c) switching between the mode (a) and the mode (b). The sustain voltage waveforms are used which compensate for an increase in voltage drop due to an increase in discharge current when the image display load factor is excessively increased.

Abstract: There is provided a plasma display device capable of high luminous efficacy and stable driving for displaying images at various image display load factors. The plasma display device performs the sustain discharge for a light-emission display, and is configured to apply a sustain pulse voltage between a sustain electrode pair in a respective one of the plural discharge cells to generate a sustain discharge in a respective one of the following operating modes selected based upon use of the plasma display device: (a) generating a pre-discharge and then a main discharge; (b) generating a main discharge without a pre-discharge preceding the main discharge; and (c) switching between the mode (a) and the mode (b). The sustain voltage waveforms are used which compensate for an increase in voltage drop due to an increase in discharge current when the image display load factor is excessively increased.

Abstract: There is provided a drive circuit including: a first signal line connectable to a capacitive load; a second signal line connectable to the capacitive load; a first switch connected between the first signal line and a first potential; a second switch connected between the first signal line and a second potential; a capacitor connected between the first and second signal lines; a third switch connected between the second signal line and the second potential; and a coil circuit connected between at least one of the first and second signal lines and the second potential. At least one of the second switch and the third switch has a configuration in which plural n-channel field-effect transistors are connected in series.

Abstract: A predrive circuit, a drive circuit and a display device which are capable of driving output elements so as to transmit control signals stably even when reference potentials generated on the output elements side turn to high voltage. A first level shift circuit outputs a flow signal which is an input signal according to a first level shift potential. A second level shift circuit outputs a flow signal which is the flow signal output from the first level shift circuit, according to a second reference potential. A level shift power supply circuit supplies the level shift potential based on a prescribed power supply voltage and the second reference potential to the first level shift circuit and the second level shift circuit.

Abstract: In a conventional method of driving a plasma display panel, for example, an auxiliary discharge is executed between an A electrode and a Y electrode to improve light-emission efficiency of a display discharge. However, since a phosphor layer is present between the A electrode and the Y electrode, the phosphor layer is exposed to a discharge, whereby there is a problem that its characteristic deteriorates. A method of driving a plasma display panel having a structure, in which at least three display electrodes X, Y, and Z used for a display discharge are provided to a display cell and no phosphor layer is formed between said display electrodes and a discharge space, the method comprising the steps of: varying a potential of at least one display electrode Z of said display electrodes during said display discharge; and making a potential of said at least one display electrode Z at a time of starting said display discharge different from that at a time of ending said display discharge.

Abstract: There is provided a drive circuit of a display device using a capacitive load which includes a clamp circuit connected to a power source potential and clamping a potential of the capacitive load to the power source potential such that an electric power is supplied to the capacitive load in a temporally dispersed manner. For example, the clamp circuit includes a plurality of switches parallelly connected between the capacitive load and the power source potential, the plurality of switches being turned on at different times.

Abstract: An air purifier includes a main body defining an air passage therein to allow sucked air to pass therethrough prior to being discharged, and a first filter installed in the main body to be switched between a closed state and an open state. The first filter removes contaminants from the sucked air in the closed state, and allows the sucked air to pass through the air passage in the open state. The air purifier may include a main body to suck and discharge air, with a bypass passage formed in the main body so that the bypass passage is opened or closed by a door, and a first filter installed in the main body. The sucked air passes through the first filter prior to being discharged when the door is closed, and passes through the bypass passage prior to being discharged when the door is opened.

Abstract: A capacitive load drive circuit that has reduced power consumption due to residual carriers, and a PDP apparatus using the same, have been disclosed. In the drive circuit, the power consumption due to the residual carriers, which are formed when a diode provided in parallel to a switch circuit of the capacitive load drive circuit is brought into conduction, is reduced and the switch circuit connected in parallel to the diode is brought into conduction during a period of time from when the diode is brought into conduction until when the potential of a terminal to which the diode is connected changes. By bringing the switch circuit connected in parallel into conduction, a closed circuit is formed by the diode and the switch circuit and the residual carriers formed in the diode are reduced. The voltage of the closed circuit is substantially zero V and, therefore, power consumption is very small even if a current due to the residual carriers flows through the closed circuit.

Abstract: A first signal line (OUTA) supplies a first electric potential to a terminal of an X-side of a load (20) through a switch (SW4). A second signal line (OUTB) supplies a second electric potential to the terminal of the X-side of the load (20) through a switch (SW5). Coil circuits (A and B) are connected between the first signal line (OUTA) and the second signal line (OUTB) and a ground. Furthermore, each of the coil circuits (A and B) is a circuit configured with, for example, a coil and a diode, and the coil is connected so as to carry out L-C resonance with the load (20) through the switches (SW4 and SW5).

Abstract: A first and a second signal line respectively supplying a first potential and a second potential to one end of a capacitive load, a waveform output circuit whose input terminal is connected to a supply line supplying a third potential, whose output terminal is connected to the first or the second signal line, and whose control terminal is connected to a waveform generating circuit, and a reactive current preventing switch connected between the control terminal and the output terminal or the input terminal of the waveform output circuit are provided. During a period when a reactive current is prevented from flowing, the reactive current preventing switch is bought into conduction to make a potential difference between the control terminal and the output terminal of the waveform output circuit smaller so that the waveform output circuit cannot be operated, which prevents the reactive current from flowing, leading to an improvement in the reliability of a driving circuit.

Abstract: A first signal line for supplying a potential to one terminal of a capacitive load, a first switch element for supplying a first potential to the first signal line, a first drive circuit for driving the first switch element, and a second signal line for supplying a second potential different from the aforesaid first potential to the one terminal of the capacitive load are included. A first capacitor is capable of supplying a lower potential than the first and the third potentials to the first signal line. A coil circuit is connected between the first signal line or the second signal line and a supply line for supplying the third potential. A floating power supply circuit supplies power supply voltage with a potential of the first signal line as a reference to the first drive circuit.