GB782095A - Improvements in or relating to electro-luminescent powders - Google Patents

Improvements in or relating to electro-luminescent powders

Info

Publication number
GB782095A
GB782095A GB2917/54A GB291754A GB782095A GB 782095 A GB782095 A GB 782095A GB 2917/54 A GB2917/54 A GB 2917/54A GB 291754 A GB291754 A GB 291754A GB 782095 A GB782095 A GB 782095A
Authority
GB
United Kingdom
Prior art keywords
copper
gold
powder
electroluminescence
electroluminescent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2917/54A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB782095A publication Critical patent/GB782095A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
    • H05B33/145—Arrangements of the electroluminescent material

Landscapes

  • Electroluminescent Light Sources (AREA)

Abstract

782,095. Electroluminescence. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 1, 1954 [Feb. 4, 1953], No. 2917/54. Class 39(1). Electroluminescent sulphide powders are prepared by subjecting the photo- or cathodelumniescent powdered material to treatment with copper or copper-containing compounds and/or gold or gold-containing compounds to form a layer on the outer side of each particle which is higher in copper or gold content than the interior of the particle. The starting material has a lattice built up from one or more of the elements of each of the groups (1) zinc and cadmium, (2) sulphur and selenium, (3) silver, copper, lead, manganese, scandium, gallium, indium, phosphorus, arsenic, gold, antimony, chlorine, bromine and aluminium, the atomic ratio of the elements of groups 3 and 1 being from 10<SP>-6</SP> to 5.10<SP>-2</SP>. The treatment may be by immersion of the powdered material in a solution of copper or gold compounds, e.g. a À001M solution of copper sulphate or auric chloride ; the particles being afterwards dried at 100‹-180‹C. In another method, the copper or gold is deposited by vaporisation in vacuo and the material may already be in layer form on a metallised support as for an electroluminescent plaque. In another alternative, a copper or gold plate is mounted just above the powder in an atmosphere of rare gas and a discharge is passed between the plate and an anode to volatilize the copper or gold, the powder being agitated. The electroluminescence may be enhanced by further heating of the powder at a temperature of between 400‹C. and 800‹C. for a period of between a few minutes and a few hours. The Specification contains seven examples of the various processes used. Specifications 782,096 and 782,097 are referred to.
GB2917/54A 1953-02-04 1954-02-01 Improvements in or relating to electro-luminescent powders Expired GB782095A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL782095X 1953-02-04

Publications (1)

Publication Number Publication Date
GB782095A true GB782095A (en) 1957-09-04

Family

ID=19832175

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2917/54A Expired GB782095A (en) 1953-02-04 1954-02-01 Improvements in or relating to electro-luminescent powders

Country Status (1)

Country Link
GB (1) GB782095A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031415A (en) * 1959-11-16 1962-04-24 Sylvania Electric Prod Electroluminescent phosphor and process for making same
US3052638A (en) * 1958-12-18 1962-09-04 Du Pont Preparation of recalcined zinc sulfide phosphors
US3082344A (en) * 1960-09-28 1963-03-19 Westinghouse Electric Corp Method for improving electroluminescent phosphor and electroluminescent lamp
US3113929A (en) * 1960-07-12 1963-12-10 Sylvania Electric Prod Method for increasing the brightness of electroluminescent phosphors
US3133027A (en) * 1962-01-15 1964-05-12 Westinghouse Electric Corp Method for processing zinc-cadmium sulfide electroluminescent phosphor
US3154502A (en) * 1961-07-12 1964-10-27 Ibm Luminescent germanium dioxide compositions
US3165476A (en) * 1962-01-15 1965-01-12 Westinghouse Electric Corp Method of processing electroluminescent phosphor
US3213515A (en) * 1961-02-06 1965-10-26 Sylvania Electric Prod Process for increasing light emission, stabilization and rejuvenation of electro-luminescent lamps and phosphors
US3418248A (en) * 1965-08-16 1968-12-24 Westinghouse Electric Corp Preparation of electroluminescent phosphors
US3507805A (en) * 1967-04-18 1970-04-21 Westinghouse Electric Corp Long-afterglow phosphor
JPS4826984B1 (en) * 1969-01-28 1973-08-17
US3775173A (en) * 1971-06-01 1973-11-27 Matsushita Electric Ind Co Ltd Method of making an electroluminescent material

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052638A (en) * 1958-12-18 1962-09-04 Du Pont Preparation of recalcined zinc sulfide phosphors
US3031415A (en) * 1959-11-16 1962-04-24 Sylvania Electric Prod Electroluminescent phosphor and process for making same
US3113929A (en) * 1960-07-12 1963-12-10 Sylvania Electric Prod Method for increasing the brightness of electroluminescent phosphors
US3082344A (en) * 1960-09-28 1963-03-19 Westinghouse Electric Corp Method for improving electroluminescent phosphor and electroluminescent lamp
US3213515A (en) * 1961-02-06 1965-10-26 Sylvania Electric Prod Process for increasing light emission, stabilization and rejuvenation of electro-luminescent lamps and phosphors
US3154502A (en) * 1961-07-12 1964-10-27 Ibm Luminescent germanium dioxide compositions
US3133027A (en) * 1962-01-15 1964-05-12 Westinghouse Electric Corp Method for processing zinc-cadmium sulfide electroluminescent phosphor
US3165476A (en) * 1962-01-15 1965-01-12 Westinghouse Electric Corp Method of processing electroluminescent phosphor
US3418248A (en) * 1965-08-16 1968-12-24 Westinghouse Electric Corp Preparation of electroluminescent phosphors
US3507805A (en) * 1967-04-18 1970-04-21 Westinghouse Electric Corp Long-afterglow phosphor
JPS4826984B1 (en) * 1969-01-28 1973-08-17
US3775173A (en) * 1971-06-01 1973-11-27 Matsushita Electric Ind Co Ltd Method of making an electroluminescent material

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