公开(公告)号：US3753711A

公开(公告)日：1973-08-21

申请号：US3753711D

申请日：1971-12-13

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： KOBAYASHI Y ,  YAKENO K

IPC: H01J9/227 ,  G03C5/00

CPC classification number: H01J9/2271

Abstract: A phosphor screen for color picture tube is usually produced by the first step which comprises suspending a blue emission phosphor in an aqueous solution of photo-setting photosensitive material comprising polyvinyl alcohol and ammonium dichromate, applying thus obtained suspension to inner surface of face panel to form a photosensitive film, exposing said film through apertures of shadow mask and developing the exposed film to form dotty phosphor film and the second and the third steps of forming the dotty phosphor films of green and red emissions in this order by substantially the same procedure as that of the first step. According to the present invention, the dotty phosphor films formed at said first and second steps are treated with chromic acid solution to harden said films, whereby color mixing, namely, so-called color fogging caused by a phosphor of other color emission used at the subsequent step is reduced and color purity of emission from phosphor screen face is improved.

Abstract translation: 彩色显像管荧光屏通常是通过第一步产生的，其中包括将蓝色荧光体悬浮在包含聚乙烯醇和重铬酸铵的光固化感光材料的水溶液中，将得到的悬浮液涂在面板的内表面上以形成 感光膜，通过荫罩的孔露出所述膜，并显影曝光的膜以形成点状荧光膜，第二和第三步骤按照与该步骤基本相同的程序按顺序形成绿色和红色发射的点状荧光膜 的第一步。 根据本发明，在所述第一和第二步骤中形成的点状荧光体膜用铬酸溶液处理以使所述膜硬化，由此颜色混合，即由在其中使用的其它颜色发射的荧光体引起的所谓的着色 随后的步骤减少，荧光屏面的发射色纯度提高。