Mitsubishi Denki Kabushiki Kaisha

Atsushi Hattori

Akira Yamada

Junko Itoh

Hideya Ito

Hiroyuki Sakaiya

Shoji Morimoto

Hiroshi Ito

Kenji Kawaguchi

Masaharu Moriyasu

Hitoshi Yamazaki

Jun Imai

Takao Takeda

Akira Ichikawa

Toshikazu Iwamoto

Seiichiro Yamamoto

Mabito Hanajima

Kazuhiko Matsumoto

A color selecting electrode assembly for color cathode ray tubes which includes an apertured grill composed of fine-strand grids, a frame over which the aperture grill is stretched and which provides a tensioning force to the apertured grill, and a supporting structure body which is mounted at one end to said frame and engages the other end with the panel side wall of a color cathode ray tube so as to support said frame, wherein the wall thickness of said apertured grill is not greater than 0.032 mm. To assure the characteristic frequency of the aperture grill, it becomes unnecessary to manufacture individually frames having rigidities corresponding to respective slit pitches of the apertured grill. The frame can be a general purpose one (i.e., one used in common with others), thereby allowing the manufacture to be simplified. Further, the suppoting member can be also used in common with others, thereby allowing the design to be simplified.

Structure of color selecting electrode assembly for color cathode ray

A color selecting electrode assembly for color cathode ray tubes includes: an aperture grill having thin slits; a frame over which the aperture grill is stretched; and supporting members in which a fixing portion at one end is attached to the frame and an engaging portion at the other end is engaged with a panel pin provided on a panel side wall so as to support the frame. An elastic portion of the supporting members is arranged in such a manner that boundary portions of the elastic portion with the fixing portion and the engaging portion become parallel to a longitudinal-direction of the slits. An engaging hole bored in the engaging portion is provided at such a position that the engaging hole intersects with an imaginary extension plane in which a joining portion of the frame and the aperture grill is extended in a direction parallel to a tube axis of a color cathode ray tube.

Supporting members for a color selecting electrode assembly

A laminated shadow mask assembly for use in a color picture tube including an evacuated envelope having a longitudinal axis and also having a phosphor deposited screen lying generally perpendicular to the longitudinal axis, which assembly comprises a finely perforated, laminated shadow mask having a plurality of apertures defined therein in a predetermined pattern; a support frame for the support of the laminated shadow mask; and expansion compensating couplings disposed around the support frame for connecting the support frame in position within the evacuated envelope with the laminated shadow mask held generally parallel to the phosphor deposited screen. The finely perforated, laminated shadow mask comprises at least two perforated metal sheets each having a perforated area having minute holes defined therein and also having a non-perforated area, which minute holes in both of the perforated metal sheets form the apertures in the finely perforated, laminated shadow mask when the perforated metal sheets are connected together by means of a plurality of weld deposits formed within the perforated areas thereof to connect the perforated metal sheets firmly together.

Shadow mask assembly for color cathode ray tube

A discharge lamp having a discharge path-defining member which so defines the discharge path in the bulb that it runs in a convoluted manner with interlinked passages running between the top and the bottom of the bulb, wherein the top portion of the discharge path-defining member is provided with a top plate which permits one of the curved passage-interlinking portions at the bulb top to pass along the upper surface thereof, such that the shadow of the discharge path-defining member is eliminated from the bulb top and that the shape of the bulb can be freely selected, also enabling the lamp to be designed such that it is not easily broken, the discharge path-defining member can be easily and intimately fitted, and that the output of light is not reduced in the bulb top region.

Discharge lamp having convoluted discharge path

Growing community of inventors

Nagaokakyo, Japan

Atsushi Hattori