Nichia Chemical Industries, Limited

Nuchia Kagaku Kogyo K.k.

Miyuki Sumitomo

Katsunori Uchimura

Shoichi Bando

Ichiro Takeoka

Masaki Mori

Kouji Morimoto

Toshifumi Somatomo

Kouichi Kunikata

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

Cathode-ray tube containing an indium borate phosphor

A red-emitting phosphor represented by a general formula (Y.sub.1-x-y Cr.sub.x Gd.sub.y).sub.3 (Al.sub.1-z Ga.sub.z).sub.5 O.sub.12 with the provide that 0.0005.ltoreq.x.ltoreq.0.05, O.ltoreq.y.ltoreq.1, O.ltoreq.z.ltoreq.1, providing red- and infrared emitting luminescence, using alone or in a mixture with other phosphors in a cathode ray tube, having a constant main emission peak even if excited by a high current density, having a satisfactory luminescence efficiency, and causing less brightness saturation in proportion as a current density increases.

Phosphor for use in a cathode-ray tube and display device using one

A cathode-ray tube phosphor is manufactured by coating, on the surfaces of phosphor particles, a mixture of a metal alginate containing at least one type of a metal selected from the group consisting of Zn, Al, and an alkali earth metal and at least one type of a water-soluble binder selected from the group consisting of gum arabic, gelatin, polymethacrylamide, and polyvinyl alcohol.

Cathode-ray tube phosphor

Phosphors capable of emitting substantially white luminescent were represented by the following general formulae, (I), (II) and (III).

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Anan, Japan

Miyuki Sumitomo