发明授权
- 专利标题: Projection cathode-ray tube with interference film
- 专利标题(中): 投影阴极射线管与干涉膜
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申请号: US704960申请日: 1991-05-23
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公开(公告)号: US5166577A公开(公告)日: 1992-11-24
- 发明人: Chie Nagao , Noritsuna Hashimoto , Hiroshi Okuda , Yasuo Iwasaki
- 申请人: Chie Nagao , Noritsuna Hashimoto , Hiroshi Okuda , Yasuo Iwasaki
- 申请人地址: JPX Tokyo
- 专利权人: Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人: Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX2-138767 19900529
- 主分类号: H01J29/18
- IPC分类号: H01J29/18 ; H01J29/26 ; H01J31/10
摘要:
A projection cathode-ray tube includes a multilayered interference film interposed between a face plate and a cathode-ray tube. In order to improve brightness in a direction of the normal, then on a face plate, a phosphor layer is composed of a first layer substantially consisting of large size phosphor particles and a second layer substantially consisting of small size phosphor particles. In addition, a phosphor density of the phosphor layer is set from 20 to 50% larger than that necessary to produce a maximum brightness on a cathode-ray tube without the multilayered interference film. The phosphor particles of the phosphor layer are preferably material having a high reflectance.