US5469018A
Expired / Lapsed
US
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Resonant microcavity display
Assignee: Quantum Vision Inc
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Filing: 1993-07-20
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Granted: 1995-11-21
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Expires: 2013-07-20
Abstract
Abstract A resonant microcavity display, comprising a thin-film resonant microcavity with a phosphor active region is disclosed. The microcavity comprises: a rigid substrate; a front reflector disposed upon the rigid substrate; a phosphor active region disposed upon the front reflector; and a back reflector disposed upon the active region. The display preferentially emits light that propagates along the axis perpendicular to plane of the display, due to its quantum mechanical properties. It exhibits high external efficiency, highly controllable chromaticity, high resolution, highly directional output and highly efficient heat transfer characteristics. For these reasons it provides a suitable display element for projection screen television, high definition television, direct view television, flat panel displays, optical coupling, and other applications.
Inventors
- 👤 Stuart M. Jacobsen
- 👤 Steven M. Jaffe
- 👤 Hergen Eilers
- 👤 Michieal L. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:23
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/38; H01J61/42; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/28; H01J63/00; H01J63/06; H05; H05B; H05B33/00; H05B33/12; H05B33/22
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
23 words
A luminescent display, comprising a thin-film resonant microcavity with an active region, said active region having a phosphor disposed therein for emitting light.
Claim 2
Dependent Claim
23 words
A luminescent display, comprising a thin-film resonant microcavity with an active region, said active region having a phosphor disposed therein for emitting light.
Claim 3
Dependent Claim
94 words
The luminescent display of claim 1 wherein said microcavity comprises: a. a rigid substrate; b. a front reflective region disposed upon said substrate; c. said active region disposed upon said front reflective region; and d. a back reflective region disposed upon said active region; and at least one of said front and said back reflective regions is partially reflective, so that light produced by excitation of said active region forms a standing wave between said front reflective region and said back reflective region and is emitted through said at least one partially reflective region.
Claim 4
Dependent Claim
16 words
The luminescent display of claim 2 wherein said rigid substrate comprises a material that is transparent.
Claim 5
Dependent Claim
12 words
The luminescent display of claim 2 wherein said rigid substrate is crystalline.
Claim 6
Dependent Claim
12 words
The luminescent display of claim 2 wherein said rigid substrate is amorphous.
Claim 7
Dependent Claim
18 words
The luminescent display of claim 2 wherein said front reflective region and back reflective region are dielectric reflectors.
Claim 8
Dependent Claim
43 words
The luminescent display of claim 6 wherein said dielectric reflectors further comprise a plurality of alternating parallel layers wherein layers comprising a material with a relatively low index of refraction alternate with layers comprising a material with a relatively high index of refraction.
Claim 9
Dependent Claim
22 words
The luminescent display of claim 7 wherein said material with a relatively low index of refraction is selected from fluorides and oxides.
Claim 10
Dependent Claim
24 words
The luminescent display of claim 7 wherein said material with a relatively high index of refraction is selected from sulfides, selenides, nitrides, and oxides.
Claim 11
Dependent Claim
15 words
The luminescent display of claim 2 wherein said front reflective region is a metallic reflector.
Claim 12
Dependent Claim
15 words
The luminescent display of claim 2 wherein said back reflective region is a metallic reflector.
Claim 13
Dependent Claim
21 words
The luminescent display of claim 2 wherein said active region comprises a phosphor selected from sulfides, oxides, silicates, oxysulfides, and aluminates.
Claim 14
Dependent Claim
22 words
The luminescent display of claim 2 wherein said active region comprises an activator selected from transition metals, rare earths and color centers.
Claim 15
Dependent Claim
62 words
The luminescent display of claim 2 wherein the distance between said front reflective region and said back reflective region is equal to the desired wavelength of light to be emitted by the display multiplied by an integer and divided by the quantity 4 times the index of refraction for light of the desired wavelength of the material used in the active region.
Claim 16
Dependent Claim
62 words
The luminescent display of claim 2 wherein the distance between said front reflective region and said back reflective region is equal to the desired wavelength of light to be emitted by the display multiplied by an integer and divided by the quantity 2 times the index of refraction for light of the desired wavelength of the material used in the active region.
Claim 17
Dependent Claim
16 words
The luminescent display of claim 2 disposed upon the viewing screen of a cathode ray tube.
Claim 18
Dependent Claim
21 words
The luminescent display of claim 2 further comprising a conductive layer disposed upon said back reflective region to channel off electrons.
Claim 19
Dependent Claim
13 words
The luminescent display of claim 1 wherein said phosphor is excited by electrons.
Claim 20
Dependent Claim
17 words
The luminescent display of claim 17 further comprising a cathode ray tube to generate said exciting electrons.
Claim 21
Dependent Claim
15 words
The luminescent display of claim 1 wherein said phosphor is excited by an electric field.
Claim 22
Dependent Claim
13 words
The luminescent display of claim 1 wherein said phosphor is excited by light.
Claim 23
Dependent Claim
14 words
The luminescent display of claim 21 wherein said conductive layer is made of aluminum.
Claim 24
Dependent Claim
18 words
The luminescent display of claim 1 wherein said phosphor is selected to have a controlled excited-state decay time.
Claim 25
Independent Claim
25 words
A method of producing a luminescent display, which comprises growing a resonant microcavity, including a phosphor active region inside said microcavity, on a rigid substrate.
Claim 26
Independent Claim
25 words
A method of producing a luminescent display, which comprises growing a resonant microcavity, including a phosphor active region inside said microcavity, on a rigid substrate.
Claim 27
Dependent Claim
16 words
The method of claim 24 wherein said phosphor is selected to control the phosphor decay time.
Claim 28
Dependent Claim
24 words
The method of claim 24 wherein said active region has a width selected to control the chromaticity of the light emitted from the display.
Claim 29
Dependent Claim
33 words
The method of claim 26 wherein the width of said active region is selected so that it is equal to an integer number of quarter wavelengths of light corresponding to a selected chromaticity.
Claim 30
Dependent Claim
33 words
The method of claim 26 wherein the width of said active region is selected so that it is equal to an integer number of half wavelengths of light corresponding to a selected chromaticity.
Claim 31
Dependent Claim
28 words
The method of claim 24 wherein said microcavity has a width selected such that the microcavity has a resonance frequency that lies within the phosphor's natural luminescence resonance.
Claim 32
Dependent Claim
20 words
The method of claim 24 wherein said rigid substrate is selected to maximize the heat transfer efficiency of the display.
Claim 33
Dependent Claim
21 words
The method of claim 24 wherein said microcavity is designed to control the directionality of the light emitted from the display.
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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) | 1998-11-20 | 1999-05-22 | 1999-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-20 | 2003-05-22 | 2003-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-20 | 2007-05-22 | 2007-11-21 | $7700.00 | Window Closed / Lapsed |