发明名称 |
COLOUR CATHODE RAY TUBE |
摘要 |
In order to permit reliable light pen interaction with a black matrix shadow mask CRT, the conventional black carbon matrix is replaced by an IR phosphor. This provides a component of IR radiation irrespective of the particular color of the visible display at any given point, and such component can be detected by conventional silicon photodetector light pens. Preferably the particle size of the IR phosphor is substantially less than that of the primary color phosphors so as to largely retain both the packing density of the original black matrix and the edge definition at the IR phosphor/primary color phosphor boundaries. The IR phosphor particles are also pigmented with black graphite to retain the light-absorbing qualities of the original black matrix. |
申请公布号 |
DE3466451(D1) |
申请公布日期 |
1987.10.29 |
申请号 |
DE19843466451 |
申请日期 |
1984.02.20 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BARRETT, WILLIAM HENRY;MINN, ANDRE BYUNGYUP |
分类号 |
C09K11/58;G06F3/037;H01J29/32;(IPC1-7):H01J29/32 |
主分类号 |
C09K11/58 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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