Cathode-ray tube containing an indium borate phosphor
US5386176A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1993 |
| Grant date | Jan 31, 1995 |
| Priority date | — |
| Expiry date | Sep 27, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7797
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An indium borate phosphor of this invention is represented by formula (In.sub.l-a-b-c-d Tb.sub.a Eu.sub.b Sm.sub.c M.sub.d)BO.sub.3 wherein PA1 [1] if b.noteq.0 and c.noteq.0, PA1 1.times.10.sup.-6 .ltoreq.a.ltoreq.1.times.10.sup.-2 PA1 0<b.ltoreq.1.times.10.sup.-1 PA1 0<c.ltoreq.1.times.10.sup.-3 PA1 1.times.10.sup.-7 .ltoreq.d.ltoreq.1.times.10.sup.-2 PA1 [2] if b=c=0, PA1 1.times.10.sup.-6 .ltoreq.a.ltoreq.1.times.10.sup.-1 PA1 1.times.10.sup.-7 .ltoreq.d.ltoreq.1.times.10.sup.-2 and M is at least element selected from the group consisting of Ti, P, Si, and Ge. This phosphor has a higher bonding force between BO.sub.3 ions and ions of In or any other contained metal than that of a conventional indium borate phosphor. As a result, the current-brightness and burning characteristics of the indium borate phosphor can be greatly improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.