Patent US3665246A successfully refreshed from Google Patents.
US3665246A
Expired / Lapsed
US
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Solid state display device
Assignee: Mitsubishi Electric Corp
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Filing: 1970-06-08
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Granted: 1972-05-23
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Expires: 1990-06-08
Abstract
Abstract A solid state display device has stripe type conductive electrodes on both sides of an electroluminous layer in differing and crossing directions to each other to provide a matrix arrangement for selectively enabling a desired image to be formed. A non-crystalline switching type semiconductor is placed on said electroluminous layer to provide a memory capability for the display device upon obtainment of a light image. Switching elements are connected to each stripe type conductive electrode to enable the selective control of luminescence at a matrix point. The switch elements are selectively turned on and off in accordance with the generating of initiating pulses from a pair of electrode sources, whereby the image is controlled in the desired manner.
Inventors
- 👤 Koichiro Kurahashi
- 👤 Shigeki Ikebata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:06
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
247 words
A solid state display device for a matrix selective system comprising: an electroluminous panel formed of an electroluminous layer and a semiconductive layer applied thereto, said semiconductive layer having switching characteristics; a first group of stripe type conductive electrodes being placed on one surface of said electroluminous panel ; a second group of stripe type conductive electrodes being placed on another surface of said electroluminous panel and in a direction crossed to that of said first group, at least one of said groups of stripe type conductive electrodes being transparent; a source for generating an electrical voltage less than the necessary value for initiating luminous radiation from said electroluminous panel, said necessary value being determined by the characteristics of said semiconductive layer and wherein said source is connected to both said first and said second group of stripe type conductive electrodes; an electric pulse source which is connected to each of said first and said second stripe type conductive electrodes and wherein the voltage from said pulse source is less than said necessary value for initiating luminous radiation when only one of said first or said second group of stripe type conductive electrodes is impressed with said voltage, but is of said necessary value when both said first and said second group of stripe type conductive electrodes are simultaneously impressed with said voltage from said pulse source whereby at such time luminous radiation will occur and said semi-conductive layer will be provided with a luminous memory function.
Claim 2
Dependent Claim
247 words
A solid state display device for a matrix selective system comprising: an electroluminous panel formed of an electroluminous layer and a semiconductive layer applied thereto, said semiconductive layer having switching characteristics; a first group of stripe type conductive electrodes being placed on one surface of said electroluminous panel ; a second group of stripe type conductive electrodes being placed on another surface of said electroluminous panel and in a direction crossed to that of said first group, at least one of said groups of stripe type conductive electrodes being transparent; a source for generating an electrical voltage less than the necessary value for initiating luminous radiation from said electroluminous panel, said necessary value being determined by the characteristics of said semiconductive layer and wherein said source is connected to both said first and said second group of stripe type conductive electrodes; an electric pulse source which is connected to each of said first and said second stripe type conductive electrodes and wherein the voltage from said pulse source is less than said necessary value for initiating luminous radiation when only one of said first or said second group of stripe type conductive electrodes is impressed with said voltage, but is of said necessary value when both said first and said second group of stripe type conductive electrodes are simultaneously impressed with said voltage from said pulse source whereby at such time luminous radiation will occur and said semi-conductive layer will be provided with a luminous memory function.
Claim 3
Dependent Claim
45 words
A solid state display device according to claim 1, further including a plurality of impedances connected between said first and said second group of stripe type conductive electrodes and said source for generating an electrical voltage less than the necessary value for initiating luminous radiation.
Claim 4
Dependent Claim
52 words
A solid state display device according to claim 1, further including a plurality of impedances of the condenser type which are connected between said first group and said second group of stripe type conductive electrodes and said electric pulse source for providing said voltage over said necessary value for initiating luminous radiation.
Claim 5
Dependent Claim
61 words
A solid state display device according to claim 1, further including a switching element which is connected to at least one of said groups of said stripe type conductive electrodes whereby a luminous memory may be eliminated on at least a unit of a line along said stripe type conductive electrode connected to said switch element by turning off the same.
Claim 6
Dependent Claim
53 words
A solid state display device according to claim 1, further including a switching element which is connected to at least one of said groups of stripe type conductive electrodes and wherein a synchronous switchgear is provided and synchronized to the frequency of said pulse source whereby an image display may be periodically changed.
Claim 7
Dependent Claim
16 words
A solid state display device according to claim 2, wherein said plurality of impedances are diodes.
Claim 8
Dependent Claim
22 words
A solid state display device according to claim 1 wherein said source for generating an electrical voltage is a direct current source.
Claim 9
Dependent Claim
54 words
A solid state display device according to claim 1 wherein said electric pulse source includes a first pulse source of a positive polarity and a second pulse source of a negative polarity and wherein said first and second pulse sources are connected, respectively,to said first and said second group of stripe type conductive electrodes.
Claim 10
Dependent Claim
18 words
A solid state display device according to claim 1, wherein said semiconductive layer is of the non-crystalline type.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |