CATHODE-RAY TUBE,申请号JP19990166764-传众专利搜索

CATHODE-RAY TUBE

申请公布号：JP2000357464(A)

申请号：JP19990166764

申请日期：1999.06.14

申请公布日期：2000.12.26

申请人：

HITACHI LTD

发明人：KOIZUMI YUKIO;KOMIYA HISAFUMI;IWAMURA NORIO

分类号：H01J29/04;H01J1/142;H01J29/20;(IPC1-7):H01J29/04

主分类号：H01J29/04

摘要：PROBLEM TO BE SOLVED: To provide a cathode-ray tube suitable for high ampere operation from a cathode capable of establishing a high brightness of cathode-ray tube, enhancing the focusing performance, and shortening the image output time. SOLUTION: An electron emitting substance layer 42 of a cathode 40 constituting an electron gun is composed of a first layer 421 including an alkaline earth metal oxide formed on the surface of the substrate metal 41 of cathode 40 and a second layer 422 made of alkaline earth metal oxide containing 0.1-10 wt.% rare earth metal oxides formed on the surface of the first layer 421 and having a mean particle size of 0.2-1.0μm, wherein the substrate metal 41 contains nickel as the main component and one or more reducing metals such as magnesium and silicon, and the plate thickness of the portion contacting with the electron emitting substance layer 42 is made between 0.10-0.15 mm.