Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Jumpei Hashiguchi

Kinzo Nonomura

Satoshi Kitao

Ryuichi Murai

Kiyoshi Hamada

Hidehiko Shoji

Masayuki Takahashi

Shigeo Kigo

Toshikazu Wakabayashi

Kenji Ogawa

Hiroyuki Tachibana

Tomohiro Murakoso

Manabu Inoue

Nobuyuki Matsui

Hideki Nakata

Mitsuhiro Kasahara

Fumito Kusama

Satoshi Ikeda

Yasuhiro Arai

Shizuo Inohara

Toshikazu Nagaki

Takeru Yamashita

Etsuo Tsujimoto

Mitsuhiro Mori

Masanori Nakatsuji

Katsuhisa Kitada

Kazuo Oohira

A PDP (plasma display panel) is attached to an electrically conductive board with a heat dissipation sheet sandwiched therebetween. A first driving circuit board is fixed on the electrically conductive board by a plurality of electrically conductive supports. On one surface, which faces the electrically conductive board, of the first driving circuit board, one or a plurality of electronic components are mounted, while a second driving circuit board is fixed. A plurality of support terminals of the second driving circuit board are connected to the first driving circuit board, and the first driving circuit board is attached to the electrically conductive board by the electrically conductive supports. Thus, one surface of the second driving circuit board is in contact with the electrically conductive board. One or a plurality of surface mount components are mounted on the other surface of the second driving circuit board that faces the first driving circuit board.

Plasma display device

In a method of driving a panel, in initializing periods of a plurality of sub-fields constituting one field, one of all-cell initializing operation or selective initializing operation is performed. In the all-cell initializing operation, initializing discharge is performed in all the discharge cells for displaying an image. In the selective initializing operation, initializing discharge is selectively performed only in the discharge cells subjected to sustaining discharge in the sub-field immediately before the sub-filed. According to the average picture level (APL) of the signal of an image to be displayed or the light-emitting rate of a predetermined sub-field, the initializing operation in the initializing period of each sub-field is determined to be one of the all-cell initializing operation and the selective initializing operation.

Method of driving plasma display panel

A reset pulse generating section applies the total of voltages of a positive voltage source and two constant-voltage sources from a high side ramp wave generating section to a high side scan switching device as the upper limit of a reset voltage pulse, and applies the ground potential from a low side ramp wave generating section to a low side scan switching device as the lower limit of the reset voltage pulse. A sustaining pulse generating section applies the upper and lower limits of a sustaining voltage pulse through a common sustaining pulse transmission path to the low side scan switching device.

Plasma display panel driver and plasma display

In a circuit driving a capacitive load Cp, current passed through a transistor Q, a diode Dand a recovering coil L is passed through lines L, L, and the inductance components of the lines Land L, and the drain-source capacitances of the transistors Qand Qgenerate LC resonance. Capacitors Cand Care connected in parallel to the drain-source regions of the transistors Qand Qto increase the total drain-source capacitance and reduce the resonance frequency, so that unwanted electromagnetic wave radiation in a frequency band affecting other electronic devices is suppressed.

Driving circuit and display device

Barrier ribs are disposed on a back substrate so as to separate main discharge cells and priming discharge cells, and the top parts of the barrier ribs are formed so as to abut on a front substrate. In a driving method, in an odd-numbered line writing time period, scan pulse Va is sequentially applied to odd-numbered scan electrode SCand voltage Vq is applied to even-numbered sustain electrode SUto cause priming discharge between even-numbered sustain electrode SUand odd-numbered scan electrode SC. In an even-numbered line writing time period, scan pulse Va is sequentially applied to even-numbered scan electrode SCand voltage Vq is applied to odd-numbered sustain electrode SUto cause priming discharge between odd-numbered sustain electrode SUand even-numbered scan electrode SC.

Plasma display panel drive method

Barrier ribs are disposed on a back substrate so as to separate main discharge cells formed of a display electrode pair and a data electrode which face each other and priming discharge cells formed of a clearance between two adjacent scan electrodes. The top parts of the barrier ribs are formed so as to abut on a front substrate. In a driving method, in an odd-numbered line writing time period, scan pulse Va is sequentially applied to odd-numbered scan electrode SCand voltage Vq is applied to even-numbered scan electrode SCto cause priming discharge between scan electrode SCand odd-numbered scan electrode SC. In an even-numbered line writing time period, scan pulse Va is sequentially applied to even-numbered scan electrode SCand voltage Vq is applied to odd-numbered scan electrode SCto cause priming discharge between scan electrode SCand even-numbered scan electrode SC.

In each of sub-fields on each of lines in a plasma display device, it is judged whether or not all of a plurality of discharge cells on the line or the display cells whose number is not less than a predetermined number do not emit light, and at least one of a voltage applied to a scan electrode and a voltage applied to a sustain electrode on the line are kept at predetermined levels when all of the discharge cells or the discharge cells whose number is not less than the predetermined number do not emit light, or a pulse having the same phase as that of a sustain pulse applied to the sustain electrodeis periodically applied in place of a sustain pulse applied to the scan electrodecorresponding to the line, to decrease a charge or discharge current as well as to reduce the generation of electromagnetic waves.

Display and it's driving method

In a circuit driving a capacitive load Cp, current passed through a transistor Q , a diode D and a recovering coil L is passed through lines L , L , and the inductance components of the lines L and L , and the drain-source capacitances of the transistors Q and Q generate LC resonance. Capacitors C and C are connected in parallel to the drain-source regions of the transistors Q and Q to increase the total drain-source capacitance and reduce the resonance frequency, so that unwanted electromagnetic wave radiation in a frequency band affecting other electronic devices is suppressed.

Driving circuit and display

Luminous gradations are displayed to display luminous half tones. This is accomplished by superposing in time wise fashion a plurality of binary images, in which the binary images are individually assigned with a weight according to respective luminous level so that an absolute value of difference (&ldquo;primary difference&rdquo;) of the weights that are assigned to each of the adjoining binary images becomes equal to or less than 6% of a total number of luminous gradations that are displayed by superposing the binary images, when the binary images are arranged in an ascending order.

Image display method

Both side walls in a periodic magnetic lens device which are arranged in parallel with a planar fluorescent display surface and which define therebetween electron beam paths for guiding electron beams are formed in a shape which is concave-curved, and accordingly, the guide paths have a cross-sectional shape which is substantially rotationally symmetric in order to increase the possible travel distance of an electron beam.

Flat tube display apparatus

An electron source includes: linear thermionic cathodes for emitting electron beams; an electron beam lead-out electrode which is disposed substantially in a parallel relationship with the linear thermionic cathodes and is formed with apertures for passing the electron beams therethrough; and a plurality of support members for supporting the linear thermionic cathodes each of which has a contact portion held in contact with at least a portion of the linear thermionic cathodes; wherein each of the apertures of the elctron beam lead-out electrodes is disposed so as to confront the contact portion of the support member.

Electron source for a display device

In a planar type display device, deterioration of the picture quality caused by distortion of laminated electrodes due to temperature rise in use is prevented by laminating the electrodes having such a structure that each electrode plate is free from expansion and contract by thermal expansion. Securing means spacers 23 thicker slightly than electrode plates are inserted in holes of the electrode plates 21a to 21e, securing means pin 24 is passed therethrough holding electrode plate spacers 22 therebetween, forming laminated electrode group 5. Since the respective electrode plates have slight gaps in a thickness direction and the electrode plates are free from expansion and contraction and do not distorted at the time of thermal expansion.

Planar type display device and its driving method

A flat tube display apparatus wherein a row of many electron beam generators is arranged transversely in a thin flat vacuum tube body to generate a number of beams in parallel with each other which travel in parallel with an image screen and to deflect the beams toward the image screen at a predetermined position. The beams are guided without being widely diverged due to the provision of a number of side walls arranged in parallel with each other to confine beams and due to the provision of alternately strong and weak magnetic fields along the side walls. Image brightness can be further increased by a frit-glass-laminated structure of a multiplier or microchannel.

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Kyoto, Japan

Jumpei Hashiguchi