Mitsubishi Denki Kabushiki Kaisha

Minoru Kobayashi

Susumu Hoshinouchi

Ryo Suzuki

Keiji Watanabe

Masato Saito

Keiji Fukuyama

Takuya Ohira

Yoshinori Hatanaka

Akio Yoshida

Shigeo Sasaki

Yoshihiko Kusakabe

Takuji Oda

Hiroaki Tobuse

Tomoyuki Kanda

Noriko Morita

Masaru Shinkai

Masaaki Kinoshita

Seiichi Tanahashi

Yasusi Hisaoka

Ryuji Ueda

Akihiko Yamasaki

Toshiaki Fukunishi

Tadayoshi Owaki

Toshifumi Sato

A control electrode portion for passing electrons through a given electron-passing hole selected from a plurality of electron-passing holes provided on an insulating substrate is formed by coating the insulating substrate with a conductive film and dividing the into a plurality of conductive films as control electrodes. This structure obviates the mesh structure of electrons which are necessary in the case of arranging control electrodes on the insulating substrate, thereby realizing high-definition display devices with improved luminance. In addition, planar display devices provided with a surface insulated substrate produced by forming an insulating film on a conductive substrate having electron-passing holes and a plurality of separate control electrodes arranged on the surface insulated substrate, it is possible to prevent the charge-up effect which obstructs the passage of electron beams and, hence, to enhance the luminance at least by (1) providing a voltage applying circuit for applying a predetermined voltage to the conductive substrate, (2) providing a portion at which the conductive substrate is exposed between the adjacent control electrodes.

Planar display apparatus having exposed insulated substrate portion

Planar display devices which have a small thickness and used as a display unit of a television set, a monitor or the like. A control electrode portion for passing electrons through a given electron-passing hole selected from a plurality of electron-passing holes provided on an insulating substrate is formed by coating the insulating substrate with a conductive film and dividing them into a plurality of conductive films as control electrodes. This structure obviates the mesh structure of electrons which are necessary in the case of arranging control electrodes on the insulating substrate, thereby realizing high-definition display devices with improved luminance. In addition, planar display devices provided with a surface insulated substrate produced by forming an insulating film on a conductive substrate having electron-passing holes and a plurality of separate control electrodes arranged on the surface insulated substrate, it is possible to prevent the charge-up effect which obstructs the passage of electron beams and, hence, to enhance the luminance by (1) providing a voltage applying means for applying a predetermined voltage to the conductive substrate, (2) providing a portion at which the conductive substrate is exposed between the adjacent control electrodes, and so on.

Planar display apparatus

In a color cathode-ray tube, only a foreign matter adhering to a shadow mask is removed effectively without thermal deformation of the shadow mask or thermal denaturation of phosphors. An electron beam produced by an electron gun incorporated in a cathode-ray tube itself is scanned or irradiated to all over a shadow mask of the color cathode-ray tube. The radiant state of a fluorescent screen at this stage is checked to detect a foreign matter adhering to the shadow mask. The electron beam is deflected to align with the position at which the foreign matter is detected, and then irradiated to the foreign matter in the form of pulses. Thus, the foreign matter is heated and removed.

Method and apparatus for removing foreign matters from a cathode-ray tube

A thin high temperature heater includes an adhesive layer of Ti disposed an insulating substrate and a resistor layer of a Ti compound disposed the adhesive layer.

Thin high temperature heater

A wire electrical discharge machining apparatus which cuts to a desired shape a workpiece placed on a workpiece table, using a discharge phenomenon occurring between the workpiece and a wire electrode opposite to the workpiece with a machining fluid in a space therebetween, characterized in that the workpiece table is made of cast iron having a coefficient of thermal expansion of less than 6.times.10.sup.-6 /.degree.C. and that a surface layer is provided on the workpiece table on which a workpiece is placed, the surface layer having corrosion resistance to the machining fluid and having a hardness higher than that of the material constituting the workpiece table.

Wire electrical discharge machining apparatus

An electrolytic apparatus for applying a voltage to a workpiece (1) and a counter electrode (5) both immersed in an electrolyte (3) contained in a vessel (4) thereby processing the workpiece (1) comprises a voltage source (15, 15') for applying voltage between the workpiece (1) and the counter electrode (5) in the form of pulses whose polarity is periodically changed, a beam generator (16) for irradiating a subsidiary energy beam (17) on a selected region of the workpiece (17) by generating the beam (17) in the form of periodic pulses and a timing control device (21) for synchronizing the periods of the voltage pulses and the beam pulses.

Electrolytic method and apparatus

Growing community of inventors

Amagasaki, Japan

Minoru Kobayashi