Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Denki Kabushiki

Ko Sano

Takeo Saikatsu

Toyohiro Uchiumi

Kanzou Yoshikawa

Takao Yasue

Shigeki Harada

Keiji Fukuyama

Kazutoshi Morikawa

Keiji Watanabe

Takayoshi Nagai

Shinsuke Yura

Shinichiro Nagano

Takao Sawada

Toshiro Kajiwara

Goroku Kobayashi

Noritsuna Hashimoto

Manabu Akiba

Yojiro Yano

A plasma display apparatus includes a plurality of display element electrodes each constituted of a pair of electrode segments having linear edges opposing each other, with a predetermined distance provided therebetween, the width of each of the electrode segments becoming narrower in the direction away from the associated one of the linear edges. The plasma display apparatus also includes a barrier structure, the inner surfaces of which being disposed along the outer ends of the plurality of display element electrodes and thereby defining a plurality of cells each of which is to be activated by the associated one of the plurality of display element electrodes so as to emit light. In the plasma display apparatus, ultraviolet rays caused by a discharge are efficiently transmitted to phosphor members on the surfaces of cells to emit light with a reduced loss of energy.

Plasma display apparatus to improve efficiency of emission light

Plasma display apparatus

A display device includes a PDP having sub-pixels (C) arranged in a delta configuration and driven by a sub-field gradation method. In an odd-numbered field, three sub-pixels (C , C , C ) constitute one pixel (P) (in a first display mode). In an even-numbered field, three sub-pixels (C , C , C ) constitute one pixel (P) (in a second display mode). The pixel (P) including the sub-pixel (C ) for emitting red (R) and the sub-pixel (C ) for emitting blue (B) selects the sub-pixels (C , C ) alternately as the sub-pixel (C) for emitting green (G) on a field-by-field basis. This displaces the position of the pixel (P) field by field.

Display device

A PDP with improved luminous efficiency is provided which prevents erroneous discharge and emission in adjacent cell spaces ( ) and which effectively takes out light produced in the cell spaces ( ), and a plasma display device having the PDP is also provided. The space between a front substrate (not shown) and a back substrate ( ) is sectioned into a plurality of independent cell spaces ( ) by grid-like barrier ribs ( ). The cell spaces ( ) include discharge cells ( ) and non-discharge cells ( ). The discharge cells ( ) and the non-discharge cells ( ) are alternately arranged in horizontal and vertical directions (in alternate checkers). A phosphor ( ) is applied in the discharge cells ( ) and the phosphor ( ) is not applied in the non-discharge cells ( ).

Plasma display panel and plasma display device

Barrier ribs of the second type ( ) of the same height and material as barrier ribs of the first type ( ) are formed on a second substrate in parallel with each other along a first direction (D ) to which display electrodes XE and YE extend. Further, phosphors ( ) adhere to both side surface portions ( W and W ) of the barrier ribs of the second type ( ). This achieves a surface discharge type PDP capable of reducing a loss of ultraviolet rays due to repetition of the self absorption and emission of ultraviolet rays, and preventing the leakage of luminescence and discharge to adjacent display lines.

Surface discharge type plasma display panel with intersecting barrier ribs

The object of the present invention is to provide a gas discharge display device having improved luminous efficiency by effectively using ultraviolet ray, which is absorbed in a partition wall or a protective film and the like without contributing to excitation of a fluorescent material. By adding gadolinium to the materials excluding the fluorescent material among structures surrounding the discharge cell, ultraviolet ray having a wavelength of 315 nm is generated, which can excite the fluorescent material. The ultraviolet ray excites the fluorescent material to generate visible light, and then, electric-light conversion efficiency is improved.

Material for converting ultraviolet ray and display device using the same

Of three primary color phosphors ( ) formed in unit luminescent areas (EU) constituting a pixel (EG), the width of a blue phosphor ( B) is about twice the width of red and green phosphors ( R, G). This allows a white color temperature of 9300 K without causing deterioration of the phosphors ( ) and degrading red and green gradations.

Surface discharge type plasma display panel with blue luminescent area substantially wider than red and green luminescent areas

Barrier ribs of the second type (,) of the same height and material as barrier ribs of the first type (,) are formed on a second substrate in parallel with each other along a first direction (D,) to which display electrodes XE and YE extend. Further, phosphors (,) adhere to both side surface portions (,W,and,W,) of the barrier ribs of the second type (,). This achieves a surface discharge type PDP capable of reducing a loss of ultraviolet rays due to repetition of the self absorption and emission of ultraviolet rays, and preventing the leakage of luminescence and discharge to adjacent display lines.

An electrode for discharge light source which is suitable for discharge display on account of its high reliability and outstanding discharge characteristics attributable to the metal conductor which is formed 1-5 .mu.m thick in the discharge container and also to the film of the material for secondary emission which is formed on the metal conductor from a compound composed of LaB.sub.6 and Ba in an amount of 0.01-20 mol % of LaB.sub.6 or a compound composed of LaB.sub.6, Ba in an amount of 0.01-20 mol % of LaB.sub.6, and Ca in an amount of 0.01-5 mol % of Ba, and is 0.5-2 .mu.m thick so that it is free of pin-holes.

Growing community of inventors

Tokyo, Japan

Ko Sano