US3594610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display panel with corona discharge control
Assignee: Xerox Corp
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Filing: 1969-04-14
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Granted: 1971-07-20
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Expires: 1989-04-14
Abstract
Abstract An electroluminescent display panel having solid state storage layers, an excitation current source and an ion generating source. When excitation current is applied to the panel luminescence is induced. A corona discharge created by addressing a matrix of conductors with a coincident voltage injects ions into the semiconductor control layer of the panel and alters the impedance state thereof. The change in the impedance state of the control layer alters the current flow through the panel resulting in a corresponding change in the state of panel luminescence. By selectively writing into an addressed matrix element either sequentially or simultaneously a pattern or image is formed on the panel face. The panel may be selectively erased by the addressing voltage source or by a separate erasing voltage source.
Inventors
- 👤 Paul F Evans
- 👤 Harold D Lees
- 👤 Martin S Maltz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:18
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
100 words
An electroluminescent panel display device comprising: a first layer of electroluminescent material, a second layer of semiconductor material adapted to change its impedance state upon the injection of ions therein said second layer overlying said electroluminescent material, a plurality of parallel conductors in overlying relation with said first layer, means for supplying a current flow through said first and second layers and through alternate ones of said parallel conductors to cause said electroluminescent material to glow, and means for generating ions to be injected into said second layer for altering the impedance thereof whereby said panel luminance can be controlled.
Claim 2
Dependent Claim
100 words
An electroluminescent panel display device comprising: a first layer of electroluminescent material, a second layer of semiconductor material adapted to change its impedance state upon the injection of ions therein said second layer overlying said electroluminescent material, a plurality of parallel conductors in overlying relation with said first layer, means for supplying a current flow through said first and second layers and through alternate ones of said parallel conductors to cause said electroluminescent material to glow, and means for generating ions to be injected into said second layer for altering the impedance thereof whereby said panel luminance can be controlled.
Claim 3
Dependent Claim
24 words
The apparatus of claim 1 comprising: a support member for supporting said conductor and said first and second layers and said ion generating means.
Claim 4
Dependent Claim
29 words
The apparatus claim 2 comprising a layer of insulating material between said support and said first layer, said insulating layer having said plurality of spaced parallel conductors embedded therein.
Claim 5
Dependent Claim
18 words
The apparatus of claim 3 comprising: strips of electroluminescent material overlying each of said plurality of parallel conductors.
Claim 6
Dependent Claim
64 words
In a panel display device having a layer of electroluminescent material overlying a layer of semiconductor material said semiconductor adapted to change its impedance state when subjected to ion injection, means for passing an excitation current through said layers causing said panel to luminesce and means for generating ions to be injected into said semiconductor material whereby said panel changes its state of luminescence.
Claim 7
Dependent Claim
64 words
In a panel display device having a layer of electroluminescent material overlying a layer of semiconductor material said semiconductor adapted to change its impedance state when subjected to ion injection, means for passing an excitation current through said layers causing said panel to luminesce and means for generating ions to be injected into said semiconductor material whereby said panel changes its state of luminescence.
Claim 8
Dependent Claim
35 words
The apparatus of claim 5 wherein said ion generating means is formed into a grid configuration of conductors and includes means to select points on said panel whereby said points change their state of luminescence.
Claim 9
Dependent Claim
130 words
An electroluminescent panel display device comprising: a support member, a layer of electroluminescent material overlying said support member, a layer of semiconductor material overlying said first layer, means for passing an excitation current through saId first and second layers causing said panel to luminesce, a plurality of parallel first conductors spaced from but in overlying relation with said second layer, and a plurality of parallel second conductors spaced from and perpendicular to said first conductors, said second conductors in cooperation with said first conductors creating a corona discharge generating ions for injection into said second layer when a coincident voltage is applied to said first and second conductors whereby said panel luminance changes at the points of ion injection because of the increased or decreased impedance of said second layer.
Claim 10
Dependent Claim
130 words
An electroluminescent panel display device comprising: a support member, a layer of electroluminescent material overlying said support member, a layer of semiconductor material overlying said first layer, means for passing an excitation current through saId first and second layers causing said panel to luminesce, a plurality of parallel first conductors spaced from but in overlying relation with said second layer, and a plurality of parallel second conductors spaced from and perpendicular to said first conductors, said second conductors in cooperation with said first conductors creating a corona discharge generating ions for injection into said second layer when a coincident voltage is applied to said first and second conductors whereby said panel luminance changes at the points of ion injection because of the increased or decreased impedance of said second layer.
Claim 11
Dependent Claim
64 words
The apparatus of claim 7 comprising: a plurality of parallel third conductors interdigitated between said first conductors adapted to create a corona discharge generating ions for injection into said second layer when a voltage of a first polarity is applied thereon and a voltage of a second polarity is applied to said first and second conductors whereby the luminance of said panel is changed.
Claim 12
Dependent Claim
171 words
In a panel display having a layer of electroluminescent material overlying a layer of semiconductor material said semiconductor material adapted to change its impedance state when subjected to ion injection, means for passing an excitation current through said layers causing said panel to luminesce, a plurality of parallel first conductors spaced from but in overlying relation with said semiconductor layer, a plurality of parallel second conductors spaced from and positioned angularly in relation to said first conductors, a first array of switches connected to a voltage source for applying a voltage to said first conductors, a second array of switches connected to a voltage source for applying a voltage to said second conductors said second conductors in cooperation with said first conductors creating a corona discharge generating ions for injection into said semiconductor layer when a coincident voltage from said voltage sources is applied to said first and second conductors whereby said panel luminance changes at the points of ion injection because of the increased or decreased impedance of said semiconductor.
Claim 13
Dependent Claim
171 words
In a panel display having a layer of electroluminescent material overlying a layer of semiconductor material said semiconductor material adapted to change its impedance state when subjected to ion injection, means for passing an excitation current through said layers causing said panel to luminesce, a plurality of parallel first conductors spaced from but in overlying relation with said semiconductor layer, a plurality of parallel second conductors spaced from and positioned angularly in relation to said first conductors, a first array of switches connected to a voltage source for applying a voltage to said first conductors, a second array of switches connected to a voltage source for applying a voltage to said second conductors said second conductors in cooperation with said first conductors creating a corona discharge generating ions for injection into said semiconductor layer when a coincident voltage from said voltage sources is applied to said first and second conductors whereby said panel luminance changes at the points of ion injection because of the increased or decreased impedance of said semiconductor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |