Claims
- 1. A phosphor-coating composition which is to be coated on an inner surface of a fluorescent lamp, said composition comprising:
- a non-silicate three component phosphor particle mixture containing blue luminous phosphor particles, green luminous phosphor particles, and red luminous phosphor particles;
- a water-soluble organic binder comprising polyethylene oxide;
- a water-soluble adhesive material for increasing the adhesive strength between said phosphor particles and the inner surface of the lamp, said adhesive material comprising at least one water-soluble lanthanum compound or a derivative thereof in an amount of from 0.001 to 5% by weight in terms of a corresponding lanthanum oxide, based on the total weight of said phosphor particles; and
- an aqueous medium dissolving said organic binder and said lanthanum compound or derivative thereof, and dispersing said phosphor particles therein.
- 2. The composition according to claim 1, wherein said lanthanum compound or a derivative thereof is present in an amount of 0.2 to 1.5% by weight in terms of the corresponding lanthanum oxide.
- 3. The composition according to claim 1, wherein said binder is present in an amount sufficient to provide a viscosity of about 20 to 60 centipoises to the composition.
- 4. The composition according to claim 1, wherein said lanthanum compound is selected from the group consisting of lanthanum nitrate, lanthanum chloride, and lanthanum acetate.
- 5. The composition according to claim 1, wherein said phosphor particles have an average diameter of 3 to 8 .mu.m.
- 6. The composition according to claim 1, wherein said blue luminous phosphor comprises europium-activated strontium calcium barium chlorphosphate phosphor.
- 7. The composition according to claim 1, wherein said green luminous phosphor comprises cerium and terbium-activated lanthanum orthophosphate phosphor.
- 8. The composition according to claim 1, wherein said red luminous phosphor comprises europium-activated yttrium oxide phosphor.
Priority Claims (5)
Number |
Date |
Country |
Kind |
2-266077 |
Oct 1990 |
JPX |
|
3-25323 |
Jan 1991 |
JPX |
|
3-25324 |
Jan 1991 |
JPX |
|
3-25325 |
Jan 1991 |
JPX |
|
3-25326 |
Jan 1991 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 08/123,710, filed Sep. 20, 1993, now U.S. Pat. No. 5,433,888 which is a File Wrapper Continuation of Ser. No. 07/767,805 filed Sep. 30, 1991, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (5)
Number |
Date |
Country |
56-047479 |
Apr 1981 |
JPX |
57-205339 |
Dec 1982 |
JPX |
58-2237 |
Jan 1983 |
JPX |
63-199787 |
Aug 1988 |
JPX |
2082618 |
Mar 1982 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Proceeding of 1986 Annual Conference of the Illuminating Engineering Institute of Japan p. 7; K. Shinkai et al. no month. |
Divisions (1)
|
Number |
Date |
Country |
Parent |
123710 |
Sep 1993 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
767805 |
Sep 1991 |
|