Panasonic Corporation

Panasonic Avc Networks Kuala Lumpur Malaysia Sdn. Bhd.

Naoki Noguchi

Naoyuki Tomioka

Masahiro Yamamoto

Naoki Matsumura

Osamu Nakazawa

Kazuhiro Tada

Toshiharu Tsutsui

An image display device includes: a display unit that displays an image; a right side support and a left side support that support the display unit in an upright state, and are at least partially light-transmissive; a right side first light source and a left side first light source that are disposed in the display unit, and emit light to at least a part of the right side support and the left side support.

Image display device

Sustain discharge is stably caused while power consumption is reduced, and image display quality is improved. A plasma display device has a plasma display panel, an electric power recovering circuit for raising or falling a sustain pulse by resonating an inductor and the inter-electrode capacity of a display electrode pair, and a sustain pulse generating circuit for alternately applying, to the display electrode pair, as many sustain pulses as the number corresponding to the luminance weight in the sustain period of a plurality of subfields that are disposed in one field and have initializing, address, and sustain periods. The sustain pulse generating circuit switches and generates at least three kinds of sustain pulses including a first sustain pulse serving as a reference, a second sustain pulse that rises more gently than the first sustain pulse, and a third sustain pulse that rises more steeply than the first sustain pulse.

Plasma display device and plasma display panel drive method

In a plasma display panel, abnormal discharge in address periods is suppressed to enhance image display quality. The scan electrode driving circuit generates a first falling down-ramp voltage i.e. down-ramp voltage Lor down-ramp voltage L, in initializing periods, generates sustain pulses in sustain periods, generates a rising up-ramp voltage, i.e. erasing up-ramp voltage L, at the ends of the sustain periods, and applies the voltages to the scan electrodes. After generating the sustain pulses in the sustain periods, the scan electrode driving circuit generates a second down-ramp voltage, i.e. erasing down-ramp voltage L, which has a portion falling with a gradient gentler than that of down-ramp voltage Land down-ramp voltage L. After generating erasing down-ramp voltage L, the scan electrode driving circuit generates erasing up-ramp voltage Land applies the voltage to the scan electrodes.

Plasma display device, and method for driving plasma display panel

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Osaka, Japan

Naoki Noguchi