US4989956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual display device with fluorescent dye-doped edge-illuminating emitter panel
Assignee: Raytheon Co
•
Filing: 1989-01-04
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Granted: 1991-02-05
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Expires: 2009-01-04
Abstract
Abstract A light emitting panel is formed of a transparent plastic substrate doped with fluorescent dye which absorbs incident light through a relatively large surface area and emits light of a longer wavelength out through one edge. The incident light may be ambient or produced by a fluorescent light source. The edge emitted light is optically coupled into an edge of a display panel, which may be a polymer dispersed liquid crystal display or a plastic panel having a display surface formed with an etched or printed pattern, grating or hologram. The substrate materials of the emitting and display panels, as well as an optical adhesive which joins the edges thereof, preferably have an essentially similar index of refraction which is larger than that of air causing light propagating through the panels to be internally reflected and exit the structure only through the pattern on the display surface. The display panel is preferably transparent in the absence of light incident on the emitting panel, and produces a display visible from only one direction upon application of incident light. The display panel may be constituted as a center-high-mounted stop light for an automotive vehicle.
Inventors
- 👤 Wei-Yu Wu
- 👤 Tsung Y. Hsu
- 👤 Anna M. Lackner
- 👤 Willis H. Smith, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:51
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0013; G02B6/0023; G02B6/0031; G09; G09F; G09F13/00; G09F13/18; B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/44; G02B6/0033; G02B6/0035; G02B6/004; G02B6/0041; G02B6/0066; G02B6/007; G02B6/0071; G09F13/04; G09F13/0418; G09F13/0472; G09F19/00; G09F19/12; G09F19/20; G09F19/205; G09F9/00; G09F9/30; G09F9/35; G09F2013/184; G09F2013/185; G09F2013/1854; G09F2013/1868
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
78 words
A visual display device, comprising: display panel means formed with a display pattern on a surface thereof and having a light receiving edge and fluorescent dye doped emitter panel means for absorbing light incident upon a surface thereof and emitting light through an edge thereof, said edges of said emitter and display panel means being optically coupled to each other for edge illumination of said display pattern, said emitter and display panel means each comprising light transmitting substrates.
Claim 2
Dependent Claim
78 words
A visual display device, comprising: display panel means formed with a display pattern on a surface thereof and having a light receiving edge and fluorescent dye doped emitter panel means for absorbing light incident upon a surface thereof and emitting light through an edge thereof, said edges of said emitter and display panel means being optically coupled to each other for edge illumination of said display pattern, said emitter and display panel means each comprising light transmitting substrates.
Claim 3
Dependent Claim
25 words
A visual display device as in claim 1, in which said substrates of the emitter and display panels have a substantially equal index of refraction.
Claim 4
Dependent Claim
39 words
A visual display device as in claim 2, further comprising an optical adhesive for adhering said respective edges of the emitter and display panel means together, the optical adhesive and said substrates having an essentially similar index of refraction.
Claim 5
Dependent Claim
15 words
A visual display device as in claim 1, in which said substrates are optically transparent.
Claim 6
Dependent Claim
37 words
A visual display device as in claim 1, in which the fluorescent dye comprises a material which absorbs light at a first wavelength, and emits light at a second wavelength which is longer than the first wavelength.
Claim 7
Dependent Claim
19 words
A visual display device as in claim 1, in which the display pattern comprises grooves formed in said surface.
Claim 8
Dependent Claim
20 words
A visual display device as in claim 6, in which the display pattern further comprises ink applied in the grooves.
Claim 9
Dependent Claim
16 words
A visual display device as in claim 1, in which the display pattern comprises a hologram.
Claim 10
Dependent Claim
16 words
A visual display device as in claim 8, in which the hologram is a volume hologram.
Claim 11
Dependent Claim
18 words
A visual display device as in claim 1, in which the display pattern comprises an optical diffraction grating.
Claim 12
Dependent Claim
15 words
A visual display device as in claim 1, in which the display pattern comprises printing.
Claim 13
Dependent Claim
18 words
A visual display device as in claim 11, in which the printing comprises a pattern formed of ink.
Claim 14
Dependent Claim
17 words
A visual display device as in claim 12, in which the ink comprises a light reflecting material.
Claim 15
Dependent Claim
18 words
A visual display device as in claim 12, in which the ink further comprises a light diffusing material.
Claim 16
Dependent Claim
22 words
A visual display device as in claim 1, further comprising light source means for illuminating said surface of the emitter panel means.
Claim 17
Dependent Claim
18 words
A visual display device as in claim 15, in which the light source means comprises a fluorescent lamp.
Claim 18
Dependent Claim
40 words
A visual display device as in claim 15, in which the light source means comprises a fluorescent light emitting element and a reflector for reflecting light emitted by the light emitting element toward said surface of the emitter panel means.
Claim 19
Dependent Claim
37 words
A visual display device as in claim 15, in which the emitter panel means comprises an elongated sheet formed into a spiral shape, the light source means being disposed at substantially a center of the spiral shape.
Claim 20
Dependent Claim
47 words
A visual display device as in claim 15, in which the emitter panel means comprises a fluorescent dye doped sheet formed into a generally cylindrical shape with adjacent edges extending radially outwardly therefrom, the light source means being disposed at substantially a center of the cylindrical shape.
Claim 21
Dependent Claim
44 words
A visual display device as in claim 15, in which the emitter panel means comprises two U-shaped sections and two light sources embraced by the U-shaped sections respectively, each U-shaped section having a first edge which is optically coupled to the display panel means.
Claim 22
Dependent Claim
30 words
A visual display device as in claim 20, in which each U-shaped section has a second edge opposite the first edge provided with means for preventing light from propagating therethrough.
Claim 23
Dependent Claim
22 words
A visual display device as in claim 1, in which the display panel means is configured as an automotive center-high-mounted stop light.
Claim 24
Dependent Claim
19 words
A visual display device as in claim 1, in which the display panel means comprises a liquid crystal display.
Claim 25
Dependent Claim
21 words
A visual display device as in claim 1, in which the liquid crystal display comprises a polymer dispersed liquid crystal module.
Claim 26
Dependent Claim
33 words
A visual display device as in claim 24, in which the liquid crystal display further comprises a fluorescent dye material formed on at least one surface of the polymer dispersed liquid crystal module.
Claim 27
Dependent Claim
88 words
A stoplight device for an automotive vehicle, comprising: fluorescent dye doped emitter panel means for absorbing light incident upon a surface thereof and emitting light through an edge thereof; light source means for radiating light onto said surface of the emitter panel means in response to application of a vehicle brake; and display panel means formed with a stoplight display pattern on a surface thereof and having an edge which is optically coupled to said edge of the emitter panel means for edge illumination of the display pattern.
Claim 28
Dependent Claim
88 words
A stoplight device for an automotive vehicle, comprising: fluorescent dye doped emitter panel means for absorbing light incident upon a surface thereof and emitting light through an edge thereof; light source means for radiating light onto said surface of the emitter panel means in response to application of a vehicle brake; and display panel means formed with a stoplight display pattern on a surface thereof and having an edge which is optically coupled to said edge of the emitter panel means for edge illumination of the display pattern.
Claim 29
Dependent Claim
58 words
A stoplight device as in claim 26, in which the emitter panel means and display panel means each comprise light transmitting substrates, the device further comprising an optical adhesive for adhering said respective edges of the emitter and display panels together, the optical adhesive having an index of refraction which is essentially similar to that of said substrates.
Claim 30
Dependent Claim
40 words
A stoplight device as in claim 27, in which said index of refraction is larger than the index of refraction of air, whereby a larger proportion of light propagating inside said substrates is reflected internally than is transmitted externally thereof.
Claim 31
Dependent Claim
36 words
A stoplight device as in claim 26, in which the fluorescent dye comprises a material which absorbs light at a first wavelength and emits light at a second wavelength which is longer than the first wavelength.
Claim 32
Dependent Claim
18 words
A stoplight device as in claim 26, in which the display pattern comprises grooves formed in said surface.
Claim 33
Dependent Claim
19 words
A stoplight device as in claim 30, in which the display pattern further comprises ink applied in the grooves.
Claim 34
Dependent Claim
15 words
A stoplight device as in claim 26, in which the display pattern comprises a hologram.
Claim 35
Dependent Claim
15 words
A stoplight device as in claim 32, in which the hologram comprises a volume hologram.
Claim 36
Dependent Claim
17 words
A stoplight device as in claim 26, in which the display pattern comprises an optical diffraction grating.
Claim 37
Dependent Claim
14 words
A stoplight device as in claim 26, in which the display pattern comprises printing.
Claim 38
Dependent Claim
16 words
A stoplight devices as in claim 35, in which printing comprises a pattern formed of ink.
Claim 39
Dependent Claim
16 words
A stoplight device as in claim 36, in which the ink comprises a light reflecting material.
Claim 40
Dependent Claim
16 words
A stoplight device as in claim 36, in which the ink comprises a light diffusing material.
Claim 41
Dependent Claim
41 words
A stoplight device as in claim 26, in which the light source means comprises a fluorescent lamp which emits light at a wavelength which is substantially equal to a maximum absorption wavelength of the fluorescent dye in the emitter panel means.
Claim 42
Dependent Claim
64 words
A liquid crystal display device, comprising: fluorescent dye doped emitter panel means for absorbing light incident upon a surface thereof and emitting light through an edge thereof; and liquid crystal display panel means having a display pattern on a surface thereof and having an edge which is optically coupled to said edge of the emitter panel means for edge illumination of the display pattern.
Claim 43
Dependent Claim
64 words
A liquid crystal display device, comprising: fluorescent dye doped emitter panel means for absorbing light incident upon a surface thereof and emitting light through an edge thereof; and liquid crystal display panel means having a display pattern on a surface thereof and having an edge which is optically coupled to said edge of the emitter panel means for edge illumination of the display pattern.
Claim 44
Dependent Claim
24 words
A liquid crystal display device as in claim 40, in which the liquid crystal display panel means comprises a polymer dispersed liquid crystal module.
Claim 45
Dependent Claim
25 words
A liquid crystal display device as in claim 41, further comprising light source means for radiating light onto said surface of the emitter panel means.
Claim 46
Dependent Claim
58 words
A liquid crystal display device as in claim 40, in which the emitter panel means comprises a liquid crystal material and electrode means which sandwich the liquid crystal material therebetween to form a display pattern which is changeable between a transparent state and a light scattering state in response to an electric potential applied to the electrode means.
Claim 47
Dependent Claim
22 words
A liquid crystal display device as in claim 43, further comprising a fluorescent dye material formed on surfaces of the electrode means.
Claim 48
Dependent Claim
61 words
A liquid crystal display device as in claim 40, in which the emitter panel means and display panel means each comprise light transmitting substrates, the device further comprising an optical adhesive for adhering said respective edges of the emitter and display panels together of the optical adhesive having an index of refraction which is essentially similar to that of said substrates.
Claim 49
Dependent Claim
42 words
A liquid crystal display device as in claim 45, in which said index of refraction is larger than the index of refraction of air, whereby a larger proportion of light propagating inside said substrates is reflected internally than is transmitted externally thereof.
Claim 50
Dependent Claim
38 words
A liquid crystal display device as in claim 40, in which the fluorescent dye comprises a material which absorbs light at a first wavelength, and emits light at a second wavelength which is longer than the first wavelength.
Claim 51
Dependent Claim
45 words
A liquid crystal display device as in claim 40, in which the emitter panel means comprises two U-shaped sections and two light sources embraced by the U-shaped sections respectively, each U-shaped section having a first edge which is optically coupled to the display panel means.
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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) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |