Mixed green light-emitting phosphor, and a cathode ray tube using this phosphor
US5196763A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | May 10, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/187
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A mixed green light-emitting phosphor for a fluorescent screen of a projection cathode ray tube is prepared by mixing LaOCl phosphor activated with Tb with at least a mixture of phosphors selected from the group of a Y.sub.3 (Al,Ga).sub.5 O.sub.12 phosphor activated with Tb and a Zn.sub.2 SiO.sub.4 phosphor activated with Mn, a Y.sub.3 (Al,Ga).sub.5 O.sub.12 phosphor activated with Tb and a InBo.sub.3 phosphor activated with Tb, or a InBO.sub.3 phosphor activated with Tb and a Zn.sub.2 SiO.sub.4 phosphor activated with Mn. The fluorescent screen of the cathode ray tube is tested under standard drive conditions. From the test results, it is noted that the characteristics of the brightness and the C.I.E. coordinates of the fluorescent screen using the mixed green light-emitting phosphors is remarkably improved compared with that of the conventional Y.sub.3 Al.sub.5 O.sub.12 phosphor activated with Tb.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.