Hitachi, Ltd.

Fujitsu Corporation

Takeo Masuda

Takashi Sasaki

Masaji Ishigaki

Takahisa Mizuta

Keizo Suzuki

Michitaka Ohsawa

Masatoshi Shiiki

Kunio Ando

Seiichi Yasumoto

Hiroshi Ohtaka

Hiroyuki Mase

A plasma display panel driving method for a display panel having a plurality of electrodes forming cells, including a first electrode group arranged on a permeable substrate and being capable of being driven in common, a second electrode group arranged in parallel with the first electrode group on the permeable substrate and being capable of being driven independently, a third electrode group arranged perpendicular to the first and second electrode groups on another substrate and being capable of being driven independently. The driving method supplying a voltage with a fast rising leading edge so as to immediately produce a maximum electric discharge one time per a sub-field in a cell in which an electric discharge was performed beforehand and supplying another voltage without causing any electric discharge under a first condition.

Plasma display, driving apparatus for a plasma display panel and driving method thereof

In an operation of an address period for addressing cells of a display device, such as a plasma display panel, comprising a plurality of cells of three kinds, red (R), green (G), blue (B), which are arranged on a plane for forming a display surface thereof, in which each of said cells comprising: a pair of transparent electrodes provided in parallel to each other; an address electrode being positioned opposing the pair of transparent electrodes; luminescence medium provided on the address electrode; and a discharge space being defined between the pair of transparent electrodes and said fluorescence medium on the address electrode, wherein the address discharge is conducted by applying an address voltage to the address electrode, and the address voltage applied is determined depending upon the each kind of the cells, R, G and B.

Display device and driving method thereof

The present specification and drawings disclose a technique to display image on the display panel using subfield. Particularly, it is disclosed that the technique for conducting the reset operation by impressing, to the electrode of cells, a plurality of reset pulses per one subfield in the subfield period for the reset operation and then conducting the address operation for selecting cells for display discharge. Further, it is disclosed that the display technique for causing the cells of display panel to conduct display discharge for image display through the reset operation and address operation. Namely, it is the technique for impressing the auxiliary pulse to the electrode of cells after impression of reset pulse for reset operation to form charges in inverse voltage to the scan pulse during the address operation and then conducting the address operation for selecting the cells for display discharge.

Display panel driving method and discharge type display apparatus

A plasma display panel driving system having common X electrodes arranged on a front glass substrate driven in common, independent Y electrodes arranged parallel to the common X electrodes on the front glass substrate driven independently, address A electrodes arranged perpendicular to the common X electrodes and the independent Y electrodes on the back glass substrate driven independently, and means for performing at least one electric discharge for equalizing electrically charged particles in a cell in which another electrically charged particle is produced beforehand, thereby improving contrast. Erasing and polarization of electrically charged particles are performed by a fine line erasing pulse after a sustaining period, and an equalizing pulse having a high voltage level is supplied to the independent Y electrode to which the last fine line erasing pulse is supplied, and a regulating pulse is supplied to the common X electrode after supplying the equalizing pulse. Further, a field block having plurality of sub-fields are provided, and a full writing electric discharge and a fine line erasing electric discharge are performed in the first sub-field of each field block for reducing the number of electric discharges.

Plasma display, driving apparatus of plasma display panel and driving system thereof

A track access control system for a magnetic disc system including a magnetic disc having a plurality of servo tracks in a plurality of track zones divided in a radial direction, a logical to physical track address translation unit, a track offset update unit, and a control unit, to access a magnetic head at a physical track with offset correction. The track offset update may be carried out in an initial condition, or when a seek command is received. Also, the track offset update may be compulsorily effected when the update is not effected in a predetermined time. In this case, the system may output a virtual error data. In addition, the track offset update may be effected in response to a temperature change of the system.

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Yokohama, Japan

Takeo Masuda