US5481385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct view display device with array of tapered waveguide on viewer side
Assignee: Honeywell International Inc
•
Filing: 1993-07-01
•
Granted: 1996-01-02
•
Expires: 2013-07-01
Abstract
Abstract A direct view display including a light generating means for generating light, a modulating means for modulating light from said light generating means to form an image, and an image display means for displaying said image from said modulating means positioned adjacent to the light output surface of said modulating means, said display means comprising an array of tapered optical waveguides on a planar substrate the tapered end of each of said waveguides extending outward from said substrate and having a light input surface adjacent said substrate and a light output surface distal from said light input surface. The area of the light input surface of each waveguide is greater than the area of its light output surface, and the center-to-center distance between the light input surfaces of adjacent waveguides in said array is equal to the center-to-center distance between the light output surfaces thereof, so that the angular distribution of light emerging from the output surfaces of the waveguides is larger than the angular distribution of light entering the waveguides. Also, the waveguides in said array are separated by interstitial regions with a lower refractive index than the refractive index of said waveguides.
Inventors
- 👤 Scott M. Zimmerman
- 👤 Karl W. Beeson
- 👤 Michael J. McFarland
- 👤 James T. Yardley
- 👤 Paul M. Ferm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:12
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133524
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
202 words
A direct view flat panel display comprising: (a) a light generating means for generating light; (b) a modulating means for modulating light from said light generating means to form an image; and (c) an image display means for displaying said image from said modulating means positioned adjacent to the light output surface of said modulating means, said display means comprising an array of tapered optical waveguides on a planar substrate the tapered end of each of said waveguides extending outward from said substrate and having a light input surface adjacent said substrate and a light output surface distal from said light input surface, wherein: (i) the area of the light input surface of each waveguide is greater than the area of its light output surface, and the center-to-center distance between the light input surfaces of adjacent waveguides in said array is equal to the center-to-center distance between the light output surfaces thereof, so that the angular distribution of light emerging from the output surfaces of the waveguides is larger than the angular distribution of light entering the waveguides; and (ii) the waveguides in said array are separated by interstitial regions with a lower refractive index than the refractive index of said waveguides.
Claim 2
Dependent Claim
202 words
A direct view flat panel display comprising: (a) a light generating means for generating light; (b) a modulating means for modulating light from said light generating means to form an image; and (c) an image display means for displaying said image from said modulating means positioned adjacent to the light output surface of said modulating means, said display means comprising an array of tapered optical waveguides on a planar substrate the tapered end of each of said waveguides extending outward from said substrate and having a light input surface adjacent said substrate and a light output surface distal from said light input surface, wherein: (i) the area of the light input surface of each waveguide is greater than the area of its light output surface, and the center-to-center distance between the light input surfaces of adjacent waveguides in said array is equal to the center-to-center distance between the light output surfaces thereof, so that the angular distribution of light emerging from the output surfaces of the waveguides is larger than the angular distribution of light entering the waveguides; and (ii) the waveguides in said array are separated by interstitial regions with a lower refractive index than the refractive index of said waveguides.
Claim 3
Dependent Claim
10 words
The device of claim 1 wherein said waveguides are striated.
Claim 4
Dependent Claim
11 words
The device of claim 1 wherein said waveguides contain scattering centers.
Claim 5
Dependent Claim
12 words
The device of claim 1 which further comprises a fiber-optic face plate.
Claim 6
Dependent Claim
26 words
The direct view flat panel display of claim 1 wherein said angular distribution of light entering said waveguides ranges from about -6 to about +6 degrees.
Claim 7
Dependent Claim
26 words
The direct view flat panel display of claim 1 wherein said angular distribution of light entering said waveguides ranges from about -10 to about +10 degrees.
Claim 8
Dependent Claim
31 words
The direct view flat panel display of claim 1 wherein said angular distribution of light emerging from the output surfaces of the waveguides ranges from about -30 to about +30 degrees.
Claim 9
Dependent Claim
31 words
The direct view flat panel display of claim 1 wherein said angular distribution of light emerging from the output surfaces of the waveguides ranges from about -60 to about +60 degrees.
Claim 10
Dependent Claim
31 words
The direct view flat panel display of claim 1 wherein said angular distribution of light emerging from the output surfaces of the waveguides ranges from about -80 to about +80 degrees.
Claim 11
Dependent Claim
14 words
The device of claim 1 wherein said modulating means is a liquid crystal modulator.
Claim 12
Dependent Claim
58 words
The device of claim 10 which futher comprises: (d) an input light polarizing means positioned between said light generating means and said modulating means for polarizing light generated by said light generating means; and (e) an output light polarizing means positioned between said modulating means and said image display means for polarizing light emitted from said modulating means.
Claim 13
Dependent Claim
20 words
The device of claim 1, 10 or 11 wherein all or a portion of said interstitial regions are opticially absorptive.
Claim 14
Dependent Claim
19 words
The device of claim 12 wherein all or a portion of said interstitial regions contain an optically absorptive material.
Claim 15
Dependent Claim
17 words
The device of claim 13 wherein all or a portion of said material is in particulate form.
Claim 16
Dependent Claim
11 words
The device of claim 14 wherein said material is carbon black.
Claim 17
Dependent Claim
19 words
The device of claim 1, 10 or 11 wherein the tapered optical waveguides are constructed from organic polymeric material.
Claim 18
Dependent Claim
40 words
The device of claim 1, 10 or 11 wherein the shape of said waveguides is selected from the group consisting of right circular cones, right oval cones, right square pyramids, and right rectangular pyramids, which may be whole or truncated,
Claim 19
Dependent Claim
17 words
The device of claim 17 wherein the shape of said waveguides is a truncated right circular cone.
Claim 20
Dependent Claim
17 words
The device of claim 17 wherein the shape of said waveguides is a truncated right square pyramid.
Claim 21
Dependent Claim
47 words
The device of claim 1, 10 or 11 wherein the tapered optical waveguides possess a light input surface with largest dimension less than 100 microns across and a height of at least 200 microns with the ratio of input area to output area of at least 2.1.
Claim 22
Dependent Claim
40 words
The device of claim 1, 10 or 11 wherein said device further comprises a protective layer bonded to said waveguide array, said protective layer being positioned to receive output from the light output surfaces of the waveguides in said array.
Claim 23
Dependent Claim
13 words
The device of claim 21 wherein said protective layer has an anti-reflective coating.
Claim 24
Dependent Claim
47 words
The device of claim 11 wherein said device further comprises a protective layer bonded to said waveguide array, said protective layer being positioned to receive output from the light output surfaces of the waveguides in said array and said protective layer containing an array of negative lenses.
Claim 25
Dependent Claim
169 words
The device of claim 11 which further comprises a light-collimating means for collimating light from said generating means positioned adjacent to the light input surface of the input polarizer of said modulating means, said light-collimating means comprising an array of tapered optical waveguides on a planar substrate, the tapered end of each waveguide extending outward from said substrate and having a light output surface adjacent said substrate and a light input surface distal said light output surface, wherein: (i) the area of the light input surface of each waveguide is smaller than the area of its light output surface, and the center-to-center distance between the light input surfaces of adjacent waveguides in said array is equal to the center-to-center distance between the light output surfaces thereof, so that the divergent light from an uncollimated illumination system is partially collimated upon emergence from their output surfaces; and (ii) the waveguides in said array are separated by interstitial regions with a lower refractive index than the refractive index of said waveguides.
Claim 26
Dependent Claim
235 words
A direct view flat panel display comprising: (a) a light generating means for generating light; (b) a modulating means for modulating light from said light generating means to form an image wherein said modulating means has pixels; and (c) an image display means for displaying said image from said modulating means positioned adjacent to the light output surface of said modulating means, said display means comprising an array of tapered optical waveguides on a planar substrate the tapered end of each of said waveguides extending outward from said substrate and having a light input surface adjacent said substrate and a light output surface distal from said light input surface, wherein: (i) the area of the light input surface of each waveguide is greater than the area of its light output surface, and the center-to-center distance between the light input surfaces of adjacent waveguides in said array is equal to the center-to-center distance between the light output surfaces thereof, so that the angular distribution of light emerging from the output surfaces of the waveguides is larger than the angular distribution of light entering the waveguides; (ii) the waveguides in said array are separated by interstitial regions with a lower refractive index than the refractive index of said waveguides; and (iii) said center-to-center distance between said light input surfaces of adjacent tapered optical waveguides is less than the center-to-center distance between adjacent pixels of said modulating means.
Claim 27
Dependent Claim
235 words
A direct view flat panel display comprising: (a) a light generating means for generating light; (b) a modulating means for modulating light from said light generating means to form an image wherein said modulating means has pixels; and (c) an image display means for displaying said image from said modulating means positioned adjacent to the light output surface of said modulating means, said display means comprising an array of tapered optical waveguides on a planar substrate the tapered end of each of said waveguides extending outward from said substrate and having a light input surface adjacent said substrate and a light output surface distal from said light input surface, wherein: (i) the area of the light input surface of each waveguide is greater than the area of its light output surface, and the center-to-center distance between the light input surfaces of adjacent waveguides in said array is equal to the center-to-center distance between the light output surfaces thereof, so that the angular distribution of light emerging from the output surfaces of the waveguides is larger than the angular distribution of light entering the waveguides; (ii) the waveguides in said array are separated by interstitial regions with a lower refractive index than the refractive index of said waveguides; and (iii) said center-to-center distance between said light input surfaces of adjacent tapered optical waveguides is less than the center-to-center distance between adjacent pixels of said modulating means.
Claim 28
Dependent Claim
46 words
The direct view flat panel display of claim 25 wherein the ratio of said center-to-center distance between said light input surfaces of adjacent tapered optical waveguides to said center-to-center distance between said adjacent pixels of said modulating means is from about 0.025 to less than 1.
Claim 29
Dependent Claim
45 words
The direct view flat panel display of claim 25 wherein the ratio of said center-to-center distance between said light input surfaces of adjacent tapered optical waveguides to said center-to-center distance between said adjacent pixels of said modulating means is from about 0.125 to about 0.50.
Claim 30
Dependent Claim
43 words
The direct view flat panel display of claim 25 wherein the ratio of the length of each of said tapered optical waveguides to said center-to-center distance between said light input surfaces of adjacent tapered optical waveguides is from about 0.25 to about 20.
Claim 31
Dependent Claim
43 words
The direct view flat panel display of claim 25 wherein the ratio of the length of each of said tapered optical waveguides to said center-to-center distance between said light input surfaces of adjacent tapered optical waveguides is from about 1 to about 8.
Claim 32
Dependent Claim
32 words
The direct view flat panel display of claim 25 wherein said center-to-center distance between said light input surfaces of adjacent tapered optical waveguides is from about 5 to less than 200 microns.
Claim 33
Dependent Claim
32 words
The direct view flat panel display of claim 25 wherein said center-to-center distance between said light input surfaces of adjacent tapered optical waveguides is from about 15 to less than 200 microns.
Claim 34
Dependent Claim
31 words
The direct view flat panel display of claim 25 wherein said center-to-center distance between said light input surfaces of adjacent tapered optical waveguides is from about 25 to about 100 microns.
Claim 35
Dependent Claim
24 words
The direct view flat panel display of claim 25 wherein the length of each of said tapered optical waveguides is up to 4,000 microns.
Claim 36
Dependent Claim
27 words
The direct view flat panel display of claim 25 wherein the length of each of said tapered optical waveguides is from about 5 to about 1,600 microns.
Claim 37
Dependent Claim
27 words
The direct view flat panel display of claim 25 wherein the length of each of said tapered optical waveguides is from about 10 to about 800 microns.
Claim 38
Dependent Claim
43 words
The direct view flat panel display of claim 25 wherein said light output surface area of each of said tapered optical waveguides is from about 1 to about 50 percent of the light input surface area of each of said tapered optical waveguides.
Claim 39
Dependent Claim
43 words
The direct view flat panel display of claim 25 wherein said light output surface area of each of said tapered optical waveguides is from about 3 to about 25 percent of the light input surface area of each of said tapered optical waveguides.
References Cited (Backward Citations)
US1942841A
Cited
US3218924A
Cited
GB1017471A
Cited
US3180214A
Cited
US3279314A
Cited
US3704055A
Cited
US3767445A
Cited
US4298246A
Cited
US4290632A
Cited
JPS55110217A
Cited
US4609252A
Cited
US4299447A
Cited
USRE33987E
Cited
US4379617A
Cited
US4640736A
Cited
JPS57207235A
Cited
JPS58114026A
Cited
US4905076A
Cited
JPS59210418A
Cited
JPS59210477A
Cited
JPS6075826A
Cited
US4712854A
Cited
US4573764A
Cited
US4605283A
Cited
DE3402746A1
Cited
JPS60162282A
Cited
JPS60165622A
Cited
JPS60202422A
Cited
EP0179913A1
Cited
JPS60203915A
Cited
JPS60241024A
Cited
JPS6142241A
Cited
US4613560A
Cited
US4623676A
Cited
JPS61169880A
Cited
JPS61185785A
Cited
JPS61232420A
Cited
US4695135A
Cited
US4751509A
Cited
US4606609A
Cited
US4666248A
Cited
US4660930A
Cited
US4682853A
Cited
US4721361A
Cited
US4688093A
Cited
US4783136A
Cited
US4679900A
Cited
JPS6349786A
Cited
US4864390A
Cited
US4864390B1
Cited
US4701020A
Cited
JPS6385589A
Cited
US4692359A
Cited
US4701019A
Cited
US4725448A
Cited
US4776670A
Cited
JPS63165838A
Cited
US4762393A
Cited
US4730897A
Cited
US4767186A
Cited
US4964695A
Cited
US4955937A
Cited
US4942112A
Cited
JPH01189608A
Cited
US4956265A
Cited
US4902086A
Cited
US5159478A
Cited
JPH0254204A
Cited
EP0357396A2
Cited
US5052783A
Cited
US5137800A
Cited
US4963471A
Cited
US5005945A
Cited
US5138687A
Cited
US5151801A
Cited
US5101279A
Cited
US5136678A
Cited
JPH03245106A
Cited
US5113471A
Cited
US5132830A
Cited
JPH04119322A
Cited
US5230990A
Cited
JPH04182691A
Cited
JPH04184384A
Cited
US5061769A
Cited
US5178955A
Cited
US5076661A
Cited
US5136682A
Cited
JPH0524121A
Cited
EP0525755A1
Cited
US5139879A
Cited
JPH0580319A
Cited
US5118579A
Cited
JPH05249450A
Cited
JPH0688959A
Cited
US5288589A
Cited
JPH06265866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-01 | 1999-07-03 | 2000-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-01 | 2003-07-03 | 2004-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-01 | 2007-07-03 | 2008-01-02 | $7700.00 | Window Closed / Lapsed |