Patent US4394068A successfully refreshed from Google Patents.
US4394068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescently activated display device with improved sensitivity
Assignee: Siemens AG
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Filing: 1980-02-14
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Granted: 1983-07-19
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Expires: 2000-02-14
Abstract
Abstract An electro-optical display device has a fluorescently activated plate disposed in front of a passive display in the line of sight of a viewer. The entire surface of the fluorescently activated plate is uncovered and is available for collecting ambient light to provide an image of increased intensity and allowing the device to be utilized in environments having low optical radiation levels. The fluorescently activated plate has exit windows thereon for retransmitting the light as controlled by the switchable regions of the passive display in a designated pattern to a viewer.
Inventors
- 👤 Heinz Pape
- 👤 Ferdinand Quella
- 👤 Hans Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:14
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133617; G02F1/0102; G02F1/0105
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
104 words
A device for the optical display of information with improved sensitivity and intensity comprising: a plate consisting of a material with an index of refraction greater than 1 and which contains fluorescent particles for collection of light radiation impinging on said plate by means of fluorescent scattering; a passive display having regions controllably switchable between a light absorbing and a light reflective state, said passive display disposed behind said plate in the line of sight of a viewer; and a coupling means for coupling selected areas of said plate and said passive display to allow transmission of light in selected patterns to a viewer.
Claim 2
Independent Claim
104 words
A device for the optical display of information with improved sensitivity and intensity comprising: a plate consisting of a material with an index of refraction greater than 1 and which contains fluorescent particles for collection of light radiation impinging on said plate by means of fluorescent scattering; a passive display having regions controllably switchable between a light absorbing and a light reflective state, said passive display disposed behind said plate in the line of sight of a viewer; and a coupling means for coupling selected areas of said plate and said passive display to allow transmission of light in selected patterns to a viewer.
Claim 3
Dependent Claim
32 words
The device of claim 1 wherein said coupling means is comprised of at least one element comprised of light conducting material disposed between a switchable region of said display and said plate.
Claim 4
Dependent Claim
42 words
The device of claim 1 wherein said plate and said display each have at least one flat surface, and wherein said coupling means comprises a plane containing said flat surfaces with said plate and said display disposed adjacently at said flat surfaces.
Claim 5
Dependent Claim
24 words
The device of claim 1 wherein said plate is provided with a light exit window in registry with each switchable region of said display.
Claim 6
Dependent Claim
16 words
The device of claim 4 wherein said light exit windows are elevations on the fluorescent plate.
Claim 7
Dependent Claim
13 words
The device of claim 5 wherein the edges of said elevations are mirrored.
Claim 8
Dependent Claim
13 words
The device of claim 1 wherein the edges of said plate are mirrored.
Claim 9
Dependent Claim
22 words
The device of claim 1 wherein said coupling means has adhesive properties for maintaining said display and said plate in joined relation.
Claim 10
Dependent Claim
40 words
The device of claim 1 wherein said absorbing state is achieved by selected absorption of light radiation, and wherein said absorption in said display occurs at a frequency substantially equivalent to the frequency of fluorescent emission of said fluorescent particles.
Claim 11
Dependent Claim
30 words
The device of claim 1 wherein an opaque foil layer is disposed between said plate and said display, said opaque foil covering only regions not coupled by said coupling means.
Claim 12
Dependent Claim
26 words
The device of claim 10 wherein said foil layer has a color absorbing light of substantially the same frequency as the absorbing state of said display.
Claim 13
Dependent Claim
34 words
The device of claim 1 wherein regions of said display which are not coupled to said plate are of a color absorbing substantially the same frequencies as said light absorbing state in said display.
Claim 14
Dependent Claim
16 words
The device of claim 1 wherein regions of said display which are not switchable are mirrored.
Claim 15
Dependent Claim
13 words
The device of claim 1 wherein said display is a solid electrochrome display.
Claim 16
Dependent Claim
13 words
The device of claim 1 wherein said display is a liquid electrochrome display.
Claim 17
Dependent Claim
26 words
The device of claim 1 wherein a separate display is provided for each switchable region, and wherein said separate displays are attached directly to said plate.
Claim 18
Dependent Claim
26 words
The device of claim 15 wherein said coupling means has an area which is less than or equal to the switchable region of the electrochrome display.
Claim 19
Dependent Claim
54 words
The device of claim 14 wherein said electrochrome display contains an internal diffuse scatterer, and wherein regions of said diffuse scatterer which are not in registry with the switchable regions of said electrochrome display are of a color which absorbs light of substantially the same frequencies as the absorbing state of the electrochrome display.
Claim 20
Dependent Claim
33 words
The device of claim 14 wherein said electrochrome display contains an internal diffuse scatterer, and wherein portions of said scatterer in registry with the switchable regions of said electrochrome display contain fluorescent particles.
Claim 21
Dependent Claim
29 words
The device of claim 15 wherein said plate forms a front transparent carrier for the electrochrome display electrodes and wherein the rear carrier of the electrochrome display is transparent.
Claim 22
Dependent Claim
15 words
The device of claim 20 wherein said rear carrier of electrochrome display contains fluorescent particles.
Claim 23
Dependent Claim
25 words
The device of claim 20 wherein the index of refraction of the electrolyte in the electrochrome display is approximately equal to that of the plate.
Claim 24
Dependent Claim
25 words
The device of claim 20 wherein the electrochrome display is provided with an internal diffuse scatterer in registry with switchable regions in the electrochrome display.
Claim 25
Dependent Claim
14 words
The device of claim 20 wherein the electrolyte for the electrochrome display is transparent.
Claim 26
Dependent Claim
21 words
The device of claim 20 wherein the entire electrochrome display including the front and rear carriers are mirrored on their edges.
Claim 27
Dependent Claim
52 words
The device of claim 20 wherein the fluorescent particles in said plate are disposed in a flat region thereof closest to a viewer in the viewer's line of sight and wherein the region containing fluorescent particles is substantially thicker than the remaining region of the plate which does not contain fluorescent particles.
Claim 28
Dependent Claim
23 words
The device of claim 26 wherein the fluorescent particles in said plate are disposed in a region having a thickness of 2 mm.
Claim 29
Dependent Claim
18 words
The device of claim 20 wherein a fluorescing dye is dissolved in the electrolyte of said electrochrome display.
Claim 30
Dependent Claim
46 words
The device of claim 27 wherein an internal diffuse scatterer is provided in said electrochrome display in registry with switchable regions of said display, and wherein said diffuse scatterer is colored with a fluorescing dye absorbing different frequencies than the fluorescing dye dissolved in the electrolyte.
Claim 31
Dependent Claim
12 words
The device of claim 1, wherein said display is an electrophoretic display.
Claim 32
Dependent Claim
11 words
The device of claim 30 wherein the electrophoretic display is black.
Claim 33
Dependent Claim
13 words
The device of claim 30 wherein the electrophoretic particles are colored, e.g. white.
Claim 34
Dependent Claim
11 words
The device of claim 32 wherein the electrophoretic particles are fluorescing.
Claim 35
Dependent Claim
13 words
The device of claim 1 wherein said display is a magnetic dipole display.
Claim 36
Dependent Claim
11 words
The device of claim 34 wherein the magnetic particles are colored.
Claim 37
Dependent Claim
13 words
The device of claim 1 wherein said display is a colloid suspension display.
Claim 38
Dependent Claim
17 words
The device of claim 36 wherein the colloid suspension is comprised of fibres, e.g. carbon or herapatit.
Claim 39
Dependent Claim
16 words
The device of claim 1 wherein said display is a pleochroic dyes containing liquid crystal display.
Claim 40
Dependent Claim
10 words
The device of claim 38 wherein said dyes are fluorescing.
Claim 41
Dependent Claim
16 words
The device of claim 38 wherein the back-plate of the display is covered with fluorescing particles.
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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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |