US4654649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device
Assignee: Toshiba Corp
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Filing: 1983-07-15
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Granted: 1987-03-31
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Expires: 2003-07-15
Abstract
Abstract In a display device, a picture element capacitor is connected to a light emitting element provided in each picture element. This picture element capacitor is connected to a signal source through a switching element. The picture element is charged, by the signal source, with a signal charge corresponding to an input signal, through the closure of the switching element during some period of time. The signal charge charged into the picture element capacitor is supplied to the light emitting element, whereby the element emits lights.
Inventors
- 👤 Takuya Kojima
- 👤 Shoichi Miyashiro
- 👤 Yoshimitsu Aramaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:32
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G2300/00; G09G2300/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
127 words
A display device comprising: means for converting a plurality of input signals into corresponding signal electric charges, each signal corresponding to a picture element to be displayed; an airtight envelope; means, including a plurality of storage elements, connected with said converting means, for receiving each of the signal electric charges and storing it in a corresponding storage element; cathode means including a plurality of cathode elements disposed within said envelope and electrically connected to respective storage elements for discharging the signal electric charges from their corresponding storage elements and emitting electrons corresponding thereto; and a plurality of elements, disposed in said envelope, each being responsive to electrons emitted by a corresponding cathode element impinging thereon, for emitting light having an intensity corresponding to its respective input signal.
Claim 2
Dependent Claim
127 words
A display device comprising: means for converting a plurality of input signals into corresponding signal electric charges, each signal corresponding to a picture element to be displayed; an airtight envelope; means, including a plurality of storage elements, connected with said converting means, for receiving each of the signal electric charges and storing it in a corresponding storage element; cathode means including a plurality of cathode elements disposed within said envelope and electrically connected to respective storage elements for discharging the signal electric charges from their corresponding storage elements and emitting electrons corresponding thereto; and a plurality of elements, disposed in said envelope, each being responsive to electrons emitted by a corresponding cathode element impinging thereon, for emitting light having an intensity corresponding to its respective input signal.
Claim 3
Dependent Claim
30 words
A display device according to claim 1, further comprising a first auxiliary electrode disposed in a path of electrons flowing from said cathode means and maintained at a predetermined potential.
Claim 4
Dependent Claim
35 words
A display device according to claim 2, further comprising a second auxiliary electrode arranged in the path of electrons between said first auxiliary electrode and said light emitting elements and maintained at a predetermined potential.
Claim 5
Dependent Claim
25 words
A display device according to claim 1, wherein said cathode means comprises a photoelectric cathode capable of being excited by being irradiated with a light.
Claim 6
Dependent Claim
19 words
A display device according to claim 4, further comprising a light source for irradiating lights onto said photoelectric cathode.
Claim 7
Dependent Claim
28 words
A display device according to claim 5, wherein said light source includes means for emitting ultraviolet rays; and wherein said photoelectric cathode is excited by the ultraviolet rays.
Claim 8
Dependent Claim
24 words
A display device according to claim 2, wherein said first auxiliary electrode a coating formed on an insulation layer formed on said cathode means.
Claim 9
Dependent Claim
50 words
A display device according to claim 2, further comprising: a first insulation member provided between said first auxiliary electrode and said cathode means; and a second insulation member provided between said first auxiliary electrode and said light emitting elements, said first auxiliary electrode being supported by both said insulation members.
Claim 10
Dependent Claim
61 words
A display device according to claim 3 further comprising: a first insulation member provided between said first auxiliary electrode and said cathode means; a second insulation member provided between said second auxiliary electrode and said light emitting means; and a third insulation member is provided between said first and second auxiliary electrodes, said auxiliary electrodes being supported by said insulation members.
Claim 11
Dependent Claim
19 words
A display device according to claim 1, wherein said cathode elements are arranged in the form of a matrix.
Claim 12
Dependent Claim
17 words
A display device according to claim 1, wherein said light emitting elements emit light of different wavelengths.
Claim 13
Dependent Claim
34 words
A display device according to claim 1, further comprising: switch means, connected between said converting means and said storing means, said switch means providing a closed electrical circuit for a predetermined period of time.
Claim 14
Dependent Claim
23 words
A display device according to claim 1, wherein said storage elements and said cathode means are formed on a surface within said envelope.
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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) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |