Phosphor, method for preparing phosphor layer and vacuum fluorescent display
US6690119B2 · kind B2 · utility
1Cited by
5References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 28, 2002 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Aug 28, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7786
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A phosphor without using cadmium having excellent luminous characteristic which emits a light in the visible region. The phosphor is prepared by mixing 1% of B2O3 powder and 10% of In2O3 with CaS:Eu, Ce phosphor to prepare a mixture to which is added vehicle containing an organic binder to form paste. The vacuum fluorescent display using the phosphor exhibits lifetime performance and initial luminance superior to the fluorescent display in which a phosphor without using cadmium is applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.