US3912370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ac deformable mirror light valve
Assignee: RCA Corp
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Filing: 1974-05-31
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Granted: 1975-10-14
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Expires: 1994-05-31
Abstract
Abstract A deformable mirror light valve is improved by providing the deformable mirror light valve with an insulating layer which prevents injection of carriers into and removal of carriers from the photoconductor layer so as to form a substantially lag-free display with very little after image.
Inventors
- 👤 William Ronald Roach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:03
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/0816; G02B26/0825
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
A deformable mirror light valve of the type having a transparent substrate, a transparent conductor layer covering one surface of said transparent substrate, a photoconductor layer on said transparent conductor layer, an elastomer layer on said photoconductor layer and a deformable mirror on said elastomer layer, wherein the improvement comprises: an insulating layer disposed between said transparent conductor layer and said photoconductor layer, said insulating layer being of a material having a greater bandgap than each of said photoconductor layer and said transparent conductor layer such that said transparent conductor is transformed into a blocking contact for both polarities of bias voltage.
Claim 2
Dependent Claim
102 words
A deformable mirror light valve of the type having a transparent substrate, a transparent conductor layer covering one surface of said transparent substrate, a photoconductor layer on said transparent conductor layer, an elastomer layer on said photoconductor layer and a deformable mirror on said elastomer layer, wherein the improvement comprises: an insulating layer disposed between said transparent conductor layer and said photoconductor layer, said insulating layer being of a material having a greater bandgap than each of said photoconductor layer and said transparent conductor layer such that said transparent conductor is transformed into a blocking contact for both polarities of bias voltage.
Claim 3
Dependent Claim
18 words
A deformable mirror light valve in accordance with claim 1 in which said insulating layer comprises silicon dioxide.
Claim 4
Dependent Claim
20 words
A deformable mirror light valve in accordance with claim 2 in which said photoconductor layer comprises poly(N-vinylcarbazole) doped with trinitrofluorenone.
Claim 5
Dependent Claim
18 words
A deformable mirror light valve in accordance with claim 3 in which said elastomer layer comprises silicone rubber.
Claim 6
Dependent Claim
19 words
A deformable mirror light valve in accordance with claim 4 in which said transparent conductor layer comprises tin oxide.
Claim 7
Dependent Claim
18 words
A deformable mirror light valve in accordance with claim 1 in which said insulating layer comprises aluminum oxide.
Claim 8
Dependent Claim
81 words
A deformable mirror light valve in accordance with claim 1 in which The Fermi level in said transparent conductor layer is near the center of the gap between the valence and conduction bands of said insulating layer with the conduction band of said insulating layer being at a higher energy level than the conduction band in said photoconductor layer and the valence band of said insulating layer being at a lower energy level than the valence band of said photoconductor layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |