GB1300548A - Improvements in or relating to electroluminescent devices - Google Patents
Improvements in or relating to electroluminescent devicesInfo
- Publication number
- GB1300548A GB1300548A GB456669A GB456669A GB1300548A GB 1300548 A GB1300548 A GB 1300548A GB 456669 A GB456669 A GB 456669A GB 456669 A GB456669 A GB 456669A GB 1300548 A GB1300548 A GB 1300548A
- Authority
- GB
- United Kingdom
- Prior art keywords
- particles
- group
- electrodes
- phosphor
- localized
- 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
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
- H05B33/20—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
-
- 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
Landscapes
- Electroluminescent Light Sources (AREA)
- Luminescent Compositions (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
1300548 Electroluminescence TECHNOLOGY MINISTER OF 27 Feb 1970 [28 Jan 1969] 4566/69 Heading C4S A process for making an electroluminescent device comprises producing phosphor particles 4 of a compound or compounds of an element of Group IIb (e.g. Zn) with an element of Group VIb (e.g. S or Se) with an admixture of an activator, coating the particles with an element of Group Ib (e.g. Cu, Ag or Au) so as to introduce atoms of the element into the external surface of the particles, embedding the coated particles in a translucent matrix 5 (e.g. 50Á thick) and arranging in contact with two electrodes 2a, 2b and passing a forming direct electrical current (e.g. 0À5 to 5 watts cm.<SP>2</SP>) between the electrodes until the electrical resistance is increased (e.g. x 10) in a localized and predetermined region 7 of the phosphor layer, whereby the electroluminescence, A.C. or D.C. of either polarity, of the localized region in subsequent use is at least 100 times what it would have been if uncoated particles had been used. The translucent matrix may be polymethylmethacrylate or nitrocellulose. The localized region may be letter or figure shapes, a groove 6 being cut or scribed in the surface, to locally constrict the cross-sectional area of the phosphor layer through which forming current is to pass, a conductor etched, or heat applied to or generated within by applied visible or near infra-red radiation through masks to subject regions to distinct physical conditions which give rise to local heating Alternatively, the electrodes themselves may determine the localized region, this forming near the positive electrode. Doubly illuminated letters may be formed by using a double gap with a narrow intermediate conducting strip. The compound is preferably ZnS or ZnSe or mixtures or solid solutions of same and the activator preferably Mn or Cu and Mn. The particle to binder weight proportions may be 10 to 25%. The device is preferably encapsulated in a translucent vessel (18) containing inert gas, e.g. N 2 , with a drying agent (20) to increase its life (Fig. 3, not shown). High resistance regions form corresponding to gaps 26a, 26b to outline the letter "A" (Fig. 4, not shown). A sand wich device (Fig. 5, not shown) includes tin or indium oxide electrode (31) and Al graphite or Cu strip electrode (32). With orthogonally arrayed strips (31A) (32A) the Group Ib element is usually present as part of a complex surface phase in which atoms of the host lattice may in part have been replaced by the Group Ib element. The Group Ib element can be coated on to the phosphor particles by the use of organometallic compounds or by reacting the particles with a salt of the Group Ib metal in solution. Cu may be present in the coating in amount 0À2% by wt. of the phosphor particles. Incorporation in battery and transistor circuits is instanced.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB456669A GB1300548A (en) | 1969-01-28 | 1969-01-28 | Improvements in or relating to electroluminescent devices |
JP45006803A JPS4826984B1 (en) | 1969-01-28 | 1970-01-27 | |
SE99170A SE358899B (en) | 1969-01-28 | 1970-01-27 | |
FR7002883A FR2029573A1 (en) | 1969-01-28 | 1970-01-27 | |
NL7001218A NL176626C (en) | 1969-01-28 | 1970-01-28 | METHOD FOR MANUFACTURING A DC VOLTAGE ELECTROLUMINESCENT DEVICE |
DE19702003802 DE2003802B2 (en) | 1969-01-28 | 1970-01-28 | Process for the production of an electroluminescent body and electroluminescent body produced thereafter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB456669A GB1300548A (en) | 1969-01-28 | 1969-01-28 | Improvements in or relating to electroluminescent devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1300548A true GB1300548A (en) | 1972-12-20 |
Family
ID=9779567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB456669A Expired GB1300548A (en) | 1969-01-28 | 1969-01-28 | Improvements in or relating to electroluminescent devices |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS4826984B1 (en) |
DE (1) | DE2003802B2 (en) |
FR (1) | FR2029573A1 (en) |
GB (1) | GB1300548A (en) |
NL (1) | NL176626C (en) |
SE (1) | SE358899B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2259525A1 (en) * | 1972-11-28 | 1974-05-30 | Secr Defence Brit | ELECTROLUMINESCENT DEVICE |
DE3114200A1 (en) * | 1980-04-24 | 1982-03-25 | Osakeyhtiö Lohja AB, 08700 Virkkala | ELECTRICAL INESCENCE DISPLAY COMPONENT |
EP0090535A1 (en) * | 1982-03-25 | 1983-10-05 | The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and | Electroluminescent panels and method of manufacture |
US4442377A (en) * | 1976-06-01 | 1984-04-10 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Phosphors |
EP0163351A1 (en) * | 1984-05-31 | 1985-12-04 | Koninklijke Philips Electronics N.V. | Thin film electroluminescent device |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1366678A (en) * | 1971-11-05 | 1974-09-11 | Gen Electric Co Ltd | Electroluminescent devices and their manufacture |
JPS5267774A (en) * | 1975-12-03 | 1977-06-04 | Matsushita Electric Ind Co Ltd | Photoelectric detection device |
JPS55114939A (en) * | 1979-02-28 | 1980-09-04 | Matsushita Electric Works Ltd | Surface check unit of sheet-shaped material |
EP0267331A1 (en) * | 1986-11-10 | 1988-05-18 | Donnelly Corporation | Illuminated panel assembly |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB782095A (en) * | 1953-02-04 | 1957-09-04 | Philips Electrical Ind Ltd | Improvements in or relating to electro-luminescent powders |
-
1969
- 1969-01-28 GB GB456669A patent/GB1300548A/en not_active Expired
-
1970
- 1970-01-27 JP JP45006803A patent/JPS4826984B1/ja active Pending
- 1970-01-27 SE SE99170A patent/SE358899B/xx unknown
- 1970-01-27 FR FR7002883A patent/FR2029573A1/fr active Pending
- 1970-01-28 NL NL7001218A patent/NL176626C/en not_active IP Right Cessation
- 1970-01-28 DE DE19702003802 patent/DE2003802B2/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2259525A1 (en) * | 1972-11-28 | 1974-05-30 | Secr Defence Brit | ELECTROLUMINESCENT DEVICE |
US4442377A (en) * | 1976-06-01 | 1984-04-10 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Phosphors |
DE3114200A1 (en) * | 1980-04-24 | 1982-03-25 | Osakeyhtiö Lohja AB, 08700 Virkkala | ELECTRICAL INESCENCE DISPLAY COMPONENT |
EP0090535A1 (en) * | 1982-03-25 | 1983-10-05 | The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and | Electroluminescent panels and method of manufacture |
US4496610A (en) * | 1982-03-25 | 1985-01-29 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Electroluminescent panels and method of manufacture |
EP0163351A1 (en) * | 1984-05-31 | 1985-12-04 | Koninklijke Philips Electronics N.V. | Thin film electroluminescent device |
Also Published As
Publication number | Publication date |
---|---|
DE2003802A1 (en) | 1970-07-30 |
SE358899B (en) | 1973-08-13 |
NL176626C (en) | 1985-05-01 |
JPS4826984B1 (en) | 1973-08-17 |
FR2029573A1 (en) | 1970-10-23 |
DE2003802B2 (en) | 1978-08-10 |
NL176626B (en) | 1984-12-03 |
DE2003802C3 (en) | 1979-04-12 |
NL7001218A (en) | 1970-07-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |