Fujitsu Hitachi Plasma Display Limited

Fujitsu Corporation

Nikon Corporation

Hitachi Maxell, Limited

Nippon Kogaku K.k.

Hitachi, Ltd.

Asaka Company Limited

Kabushiki Kaisha Asaka

Akihiro Takagi

Tomokatsu Kishi

Takashi Sasaki

Tetsuya Sakamoto

Akira Otsuka

Yuji Sano

Toyoshi Kawada

Hirokazu Inoue

Noriaki Setoguchi

Shigetoshi Tomio

Takashi Shiizaki

Hitoshi Hirakawa

Tadatsugu Hirose

Takayuki Shimizu

Takahiro Takamori

Shigeki Kameyama

Keishin Nagaoka

Kiyoshi Kimoto

Takayuki Kobayashi

Yoshikazu Kanazawa

Yasunobu Hashimoto

Makoto Onozawa

Keiichi Kaneko

Satoru Nishimura

Shozo Nakagawa

Tomoya Matsui

Jun Machida

Shunichi Ohnishi

Shunichi Onishi

Shozo Makagawa

A plasma display apparatus including a capacitive load and a driving circuit is provided. The plasma display apparatus includes a driving power source supplying a drive voltage to the capacitive load and a reference potential terminal supplying a reference potential to the capacitive load. A drive IC is coupled to the driving power source.

Capacitive-load driving circuit and plasma display apparatus using the same

In a PDP device, a technique capable of more efficiently performing address energy control according to contents of a display image (display data) to reduce the address energy. In the PDP device, as an address energy recovery circuit, a plurality of address energy control circuits (Bto Bn) are provided corresponding to a plurality (n) of regions (Hto Hn) into which a screen area (R) and a group of address electrodes are divided in a horizontal direction. For each of the regions (H) of which the address energy recovery circuits (B) are respectively in charge and for each of subfields, an address pulse switching load (Q) corresponding to that region (H) is determined, and then, according to the magnitude of the load (Q), the operation of the address energy recovery circuit (B) is ON/OFF-controlled.

Method of driving plasma display panel and plasma display device

A plasma display device includes a first electrode from which sustain discharge occurs; a second electrode from which sustain discharge occur to the first electrode, a distance from the second electrode to the first electrode continuously varying in one discharge space; and a driving circuit which generates a sustain discharge pulse that rises in two stages, with an application time of a second-stage voltage being longer than an application time of a first-stage voltage, to apply the sustain discharge pulse between the first and second electrodes, thereby causing the sustain discharge.

Plasma display device and method of driving the same

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.

Plasma display apparatus

A plasma display driving method and apparatus that can reduce the occurrences of dropout, on a displayed image, caused by misaddress when the environment temperature becomes low. In the inventive plasma display, the environment temperature is determined, and during a charge adjustment interval, the ultimate voltage, which the drive waveform of a scan electrode voltage reaches at the end after continuously varying in the negative direction, is changed in accordance with the determined environment temperature in such a manner that if the environment temperature becomes lower, the ultimate voltage is directed in the positive direction.

Plasma display driving method and apparatus

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.

Drive circuit

An optical filter is provided on the output side of light from plural kinds of cells that output light with colors different from one another. In the optical filter, the penetrable rate of at least a portion of the wavelength band of light output from the cell with the color having highest luminescent intensity is set lower than that of the wavelength band of other kinds of cells. Consequently, the reflectance rate of outer light incident to a display can be reduced. Particularly, in a room environment using artificial lighting, the reflectance rate of outer light can be reduced in the wavelength band of light with relatively high luminescent intensity. Resultingly, bright room contrast can be improved by suppressing the reflection of outer light. Since the penetrable rate of the color with the highest luminescent intensity is reduced, reduction in brightness of the display can be kept to a minimum.

Display device

A capacitive-load driving circuit has a configuration in which a driving power supply source is connected to an output terminal via a driving device. The capacitive-load driving circuit has a power distributing circuit inserted between the driving power supply source and the driving device. Therefore, temperature rise (power consumption) in the capacitive-load driving circuit can be distributed.

Capacitive-load driving circuit capable of properly handling temperature rise and plasma display apparatus using the same

A problem is to be solved in that there is to be provided a display device and a display method allowing two or more sorts of sustaining pulses to be employed by switching over the pulses depending on the state of display in such a manner as to achieve characteristics including high light emission efficiency/decrease in streaking and high luminance and the like. The display device is provided wherein one frame image contains a plurality of sub-frames, including: a detection section detecting a state of display: a sustaining pulse output section to select and output one out of two or more sorts of sustaining pulses for a display for each sub-frame depending on the state of display.

Display device and display method

A driving circuit of a plasma display panel is provided in which a display cell including a first electrode and a second electrode is selected to light up, for applying a first voltage Vsto the first electrode and a second voltage Vsto the second electrode adjacent to the first electrode to cause a sustain discharge between the first and second electrodes. The driving circuit generates a sustain discharge voltage such that, during the sustain discharge between the first and second electrodes, an applied voltage Vc to a third electrode adjacent to the first electrode opposite to the second electrode falls within a range Vs&#x2266;Vc&#x3c;Vs, and, in this case, when a display cell including the third electrode is selected to light up, the polarity of a wall charge formed on the third electrode becomes positive.

Driving circuit of plasma display panel and plasma display panel

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.

Drive circuit of plasma display device

The present invention provides a plasma display device including: a plurality of scan electrodes sequentially scanned to be impressed with a scan pulse; an address electrode that is impressed with an address pulse corresponding to the scan pulse, for selection of a display pixel; a scan driving circuit generating the scan pulse; and an address driving circuit generating the address pulse. The address pulse rises in n stages (n is an integer equal to or larger than 2), and a period in a period during which the address pulse rises from a lowest voltage to a highest voltage overlaps a scan pulse immediately prior to the scan pulse corresponding to the address pulse.

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.

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Kawasaki, Japan

Akihiro Takagi