Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Yoshiki Tsujita

Kenji Sasaki

Kenji Ogawa

Toshiyuki Maeda

Katsuaki Mitani

Shigeo Kigo

Toru Ando

Tomohiro Murakoso

Takeru Yamashita

Yohei Koshio

Naoyuki Tomioka

Noboru Yasumatsuya

Kei Kitatani

Tohru Sakane

A plurality of subfields of a field period includes a subfield for performing an every-cell initialization causing an initial discharge in every discharge cell in an initialization period, and includes a subfield for performing a selective initialization causing the initial discharge in a predetermined discharge cell in the initialization period. In a low-luminance subfield, the every-cell initialization is performed, and a low-luminance subfield is subsequently located (in the field period) to the subfield for the every-cell initialization. In a sustain period of the subfield for performing the every-cell initialization or a sustain period of the low-luminance subfield, a width of a first sustain pulse is set wider than a width of a second sustain pulse, and the width of the second sustain pulse is set wider than the width of a third sustain pulse and subsequent others.

Plasma display panel drive method of determining a subfield, having a low luminance, for performing an every-cell initialization operation and setting a width of a sustain pulse of the subfield for performing the every-cell initialization operation

A plasma display panel driving method and a plasma display device estimate the highest temperature and the lowest temperature the panel can have, according to the temperature detected by the thermal sensor, and appropriately drives the panel, to improve the image display quality. Provided are at least three driving modes having different sub-field structures: a low-temperature driving mode, an ordinary-temperature driving mode, and a high-temperature driving mode. To drive the panel, estimates of the highest temperature and the lowest temperature the panel can have are made from the temperature detected by the thermal sensor, the temperature condition of the panel is determined from the estimated highest temperature or lowest temperature, and the driving mode is switched appropriately for the panel temperature condition.

Plasma display panel driving method having a high temperature and low temperature driving mode and plasma display device thereof

A plasma display device includes an AD converter; a video signal processing circuit producing subfield data; a subfield processing circuit producing control signals of each of drive circuits; a plasma display panel having scan electrodes and sustain electrodes which are alternately arranged in n rows, and data electrodes in (k+m) columns arranged in a direction of intersecting with the scan and sustain electrodes; a scan-electrode drive circuit for driving scan electrodes; a sustain-electrode drive circuit for driving sustain electrodes; and a data-electrode drive circuit which has a first drive circuit for driving data electrodes and a second drive circuit for driving data electrodes, and applies writing pulse voltage in order from a data electrode group nearest to the scan-electrode drive circuit.

Plasma display device

A projection television has a rear projection screen including a Fresnel lens and a lenticular lens, and a smoke sheet. The screen is characterized in that a dye or a pigment is mixed into the lenticular lens sheet or the smoke sheet which thereby has a waveform selection transmittance having the following transmittance values:

Projection television with a wavelength-selection-type rear projection

Growing community of inventors

Osaka, Japan

Yoshiki Tsujita