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1. 发明专利

JPH05311109A 失效
公开(公告)号：JPH05311109A
公开(公告)日：1993-11-22
申请号：JP11350892
申请日：1992-05-06
申请人： HITACHI POWDERED METALS
发明人： SAKAI KOICHI , CHIYODA HIROYOSHI
IPC分类号： H01J9/227 , C09D5/00 , C09D5/02 , C09D133/04 , C09D133/06
摘要： PURPOSE:To obtain an aqueous carbon coating capable of providing a coating film sharply outlined in forming a black matrix by selectively removing a carbon coating film. CONSTITUTION:The carbon coating for black matrix is characterized in that a binder is an emulsion of silica-modified acrylic resin and carbon particles are graphite and/or crystallized carbon black in a coating suspending carbon particles in a colloidal state in water containing a dispersing agent and the binder.

2. 发明专利

JPS61179044A CATHODE-RAY TUBE 失效
公开(公告)号：JPS61179044A
公开(公告)日：1986-08-11
申请号：JP1764285
申请日：1985-01-31
申请人： HITACHI POWDERED METALS , HITACHI LTD
发明人： DEYAMA SADAO , HIRASAWA SHIGEMI , KUBO TADAO , TOMITA YOSHIFUMI , YAMAMOTO TOSHIYA , SAKAI KOICHI
IPC分类号： H01J29/88
摘要： PURPOSE:To reduce the value of a spark current by forming a conductive inner film which is formed in the inner surface of a tube for connecting the portion between a high tension conductor and the contact of an electron gun in which the resistivity and the surface roughness of the film are limited over the characteristic value. CONSTITUTION:A high tension voltage is applied to an electron gun 7 mounted within the neck portion 1 of a cathode-ray tube from a high tension conductor 4 through a conductive film 5 which is provided in the inner surface of a cone portion 2. At this time, the resistivity of the film 5 is formed to be over 0.2OMEGA.cm, and the surface roughness of the film 5 is formed to be over 6mu, and the resistance value between the high tension conductor 4 and the electron gun 7 is formed to be 2-100KOMEGA. And by limiting the surface roughness, the evaporating film of metal barium such as barium getter and the like is made to have discontinuity property and thus to prevent the resistance of the film 5 from lowering, and further by limiting the resistivity, a spark current is restrained under about 200A. Accordingly, it is possible to prevent obstacles accompanied by the spark without making the film 5 high resistance.

3. 发明专利

JPS61176673A PAINT FOR COATING INNER SURFACE OF CATHODE RAY TUBE 失效
公开(公告)号：JPS61176673A
公开(公告)日：1986-08-08
申请号：JP1764185
申请日：1985-01-31
申请人： HITACHI POWDERED METALS , HITACHI LTD
发明人： DEYAMA SADAO , HIRASAWA SHIGEMI , KUBO TADAO , TOMITA YOSHIFUMI , YAMAMOTO TOSHIYA , SAKAI KOICHI
IPC分类号： C09D5/24 , B32B7/02 , H01B1/24 , H01J29/88
摘要： PURPOSE:To provide the titled paint composed of graphite, a metallic oxide, a surface-treating agent and water glass at specific ratios, containing a specific amount of graphite component having a specific particle diameter, giving low spark current value, and effective to prevent the troubles with spark. CONSTITUTION:(A) Graphite powder is mixed with (B) a metallic oxide, preferably titanium dioxide powder and (C) a surface-treatment agent, preferably colloidal silicon dioxide in water, and the mixture is granulated e.g. by spray- drying to obtain composite granules. The granules are compounded with (D) elemental graphite powder containing >=18% powder having particle diameter of 1mu and (E) water glass at a solid weight ratios (A+D):B:C:D of (10-22):(30-50):(2-9):(25-42), and the mixture is dispersed in water to obtain the objective paint. The paint forms a coating film having a specific resistance of >=0.2OMEGA.cm and a surface roughness of >=6mu, and suppresses the generation of spark current of >=200A.

4. 发明专利

JPH05314929A IMAGE DISPLAY DEVICE AND ITS MANUFACTURE 失效
公开(公告)号：JPH05314929A
公开(公告)日：1993-11-26
申请号：JP11350792
申请日：1992-05-06
申请人： HITACHI POWDERED METALS
发明人： SAKAI KOICHI , CHIYODA HIROYOSHI
IPC分类号： H01J29/32 , H01J9/20 , H01J9/227 , H01J29/89
摘要： PURPOSE:To provide a clear display image for an image display which is formed with absorbance matrixes in a complex configulation such as a black matrix for a color cathode ray tube, a crystal and an optical filter for a plasma display. CONSTITUTION:An image display has picture element areas arranged at spaces and a transparent plate 1 to which adjacent absorbance matrixes are adhered on one face, graphite particle layers 2a and crystallized carbon black particle layers 2b being formed on the adhesion face sides of the absorbance matrixes to the transparent plate and on the opposite sides, respectively. The absorbance matrix comprises steps of forming a stencil on the surface of the transparent plate into an absorbance matrix negatively patterned shape, of applying thereon slurry of absorbance material substancially composed of graphite particles and solidifying it into a coating, of applying slurry of absorbance material composed of crystallized carbon black particles on the coating and solidifying it into a coating and of removing the coating excluding the coating directly adhered to the surface of the transparent plate.

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