GB1471825A - Electrical luminescent display devices - Google Patents
Electrical luminescent display devicesInfo
- Publication number
- GB1471825A GB1471825A GB1756275A GB1756275A GB1471825A GB 1471825 A GB1471825 A GB 1471825A GB 1756275 A GB1756275 A GB 1756275A GB 1756275 A GB1756275 A GB 1756275A GB 1471825 A GB1471825 A GB 1471825A
- Authority
- GB
- United Kingdom
- Prior art keywords
- egcl
- segments
- layer
- semi
- pulse
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
- F21K2/06—Non-electric light sources using luminescence; Light sources using electrochemiluminescence using chemiluminescence
- F21K2/08—Non-electric light sources using luminescence; Light sources using electrochemiluminescence using chemiluminescence activated by an electric field, i.e. electrochemiluminescence
Abstract
1471825 Matrix displays NORTHERN ELECTRIC CO Ltd 28 April 1975 [2 May 1974] 17562/75 Heading G5C An electrogenerated chemiluminescent (EGCL) display device includes a photoconductive device 12 in one lead which is turned on by a pulse of suitable characteristics and is subsequently maintained on by light emitted by the EGCL material 10. In a figure of eight display device, a layer 30 of EGCL material extends over segment electrodes 27 surrounded by a common electrode 28. The device includes FET's comprising gates 21, sources 24 and drains 25, transparent layers 22, 26 of Al 2 O 3 and a photoconductive layer 23 of CdS or CdSe. Energizing pulses to selected gates renders them conductive, causing pulses to be applied to segments of the layer 23 which become conducting. Segments are turned off by a pulse of opposite sign or by using another device to by-pass current to the EGCL material. The segments may be arranged in a matrix with two semi-conductor elements in series to perform an AND function, the semi-conductor elements being connected to row and column conductors respectively. A further pair of semiconductor elements may be used to turn a segment off; in this arrangement the substrate includes four effective layers. The semiconductors may be replaced by pairs of photoresistors each sensitive to light of a particular wavelength. X and Y conductive arrays between further similar photoresistive material can be used to sense the displayed pattern by scanning. The EGCL material comprises a phosphor, a solvent and an electrolyte, the application of a potential produces a redose reaction with light emission.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA198,690A CA995330A (en) | 1974-05-02 | 1974-05-02 | Electrical luminescent displays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1471825A true GB1471825A (en) | 1977-04-27 |
Family
ID=4099855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1756275A Expired GB1471825A (en) | 1974-05-02 | 1975-04-28 | Electrical luminescent display devices |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS51108597A (en) |
| CA (1) | CA995330A (en) |
| CH (1) | CH584954A5 (en) |
| DE (1) | DE2519693A1 (en) |
| FR (1) | FR2280160A1 (en) |
| GB (1) | GB1471825A (en) |
| NL (1) | NL7505148A (en) |
| SE (1) | SE7505085L (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3246162A (en) * | 1965-03-24 | 1966-04-12 | Rca Corp | Electroluminescent device having a field-effect transistor addressing system |
-
1974
- 1974-05-02 CA CA198,690A patent/CA995330A/en not_active Expired
-
1975
- 1975-04-28 GB GB1756275A patent/GB1471825A/en not_active Expired
- 1975-04-30 SE SE7505085A patent/SE7505085L/en unknown
- 1975-04-30 FR FR7513699A patent/FR2280160A1/en active Granted
- 1975-05-01 NL NL7505148A patent/NL7505148A/en not_active Application Discontinuation
- 1975-05-02 CH CH562175A patent/CH584954A5/xx not_active IP Right Cessation
- 1975-05-02 JP JP50052630A patent/JPS51108597A/ja active Pending
- 1975-05-02 DE DE19752519693 patent/DE2519693A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS51108597A (en) | 1976-09-25 |
| CH584954A5 (en) | 1977-02-15 |
| FR2280160B1 (en) | 1977-11-10 |
| CA995330A (en) | 1976-08-17 |
| SE7505085L (en) | 1975-11-03 |
| FR2280160A1 (en) | 1976-02-20 |
| NL7505148A (en) | 1975-11-04 |
| DE2519693A1 (en) | 1975-11-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |