Patent US2185160A successfully refreshed from Google Patents.
Patent US4047075A successfully refreshed from Google Patents.
US4047075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated light-emitting diode structure and array thereof
Assignee: Telefunken Electronic GmbH
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Filing: 1976-02-27
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Granted: 1977-09-06
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Expires: 1996-02-27
Abstract
Abstract A light-emitting diode including a casing with two flat outer light-emitting opposite parallel sides connected by a curved outer surface.
Inventors
- 👤 Werner Schoberl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:05
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/852; H10H20/853; H10H20/882; H10W; H10W72/00; H10W72/50; H10W72/531; H10W72/536; H10W72/5363; H10W90/00; H10W90/701; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
96 words
In a light-emitting diode structure including a housing formed of a plastic material and having a light-emitting surface, and a semiconductor light-emitting diode embedded in said housing opposite and spaced from said light-emitting surface, the improvement wherein: said plastic housing has a rectangular cross section formed by first and second pairs of opposed parallel flat outer side surfaces; and said light-emitting surface is an outwardly curved end surface of said housing which extends to each of said side surfaces and is curved so that its surface area presents an area of uniform brightness to an observer.
Claim 2
Dependent Claim
96 words
In a light-emitting diode structure including a housing formed of a plastic material and having a light-emitting surface, and a semiconductor light-emitting diode embedded in said housing opposite and spaced from said light-emitting surface, the improvement wherein: said plastic housing has a rectangular cross section formed by first and second pairs of opposed parallel flat outer side surfaces; and said light-emitting surface is an outwardly curved end surface of said housing which extends to each of said side surfaces and is curved so that its surface area presents an area of uniform brightness to an observer.
Claim 3
Dependent Claim
40 words
A light-emitting diode structure as defined in claim 1 wherein said first pair of opposed parallel flat outer side surfaces have a width which is less than the width of said second pair of opposed parallel flat outer side surfaces.
Claim 4
Dependent Claim
20 words
A light-emitting diode as defined in claim 2, wherein said light-emitting end surface is curved substantially only in one direction.
Claim 5
Dependent Claim
28 words
A light-emitting diode as defined in claim 3, wherein the curvature of said end surface runs between the said outer surfaces of said first pair of outer surfaces.
Claim 6
Dependent Claim
29 words
A light-emitting diode as defined in claim 4, wherein: said plastic material has a refractive index greater than 1.5; and said outer surfaces are smoothed as much as possible.
Claim 7
Dependent Claim
42 words
A light-emitting diode array comprising a plurality of light-emitting diode structures as defined in claim 5 adjacent one another without any gaps therebetween and arranged in rows and columns whereby an array with a surface which can be uniformly illuminated is provided.
Claim 8
Dependent Claim
19 words
A light-emitting diode as defined in claim 1, wherein said plastic material has a refractive index greater than 1.5.
Claim 9
Dependent Claim
21 words
A light-emitting diode as defined in claim 7, and comprising glass powder in said plastics material for improving uniformity of illumination.
Claim 10
Dependent Claim
42 words
A light-emitting diode array comprising a plurality of light-emitting diode structures as defined in claim 7 adjacent one another without any gaps therebetween and arranged in rows and columns whereby an array with a surface which can be uniformly illuminated is provided.
Claim 11
Dependent Claim
26 words
A light-emitting diode as defined in claim 1, wherein said plastic material includes colouring matter in order to increase the contrast ratio between light and dark.
Claim 12
Dependent Claim
44 words
A light-emitting diode as defined in claim 10, wherein in order to achieve a yellow, orange and red illuminating colour, colour pigments are used such that an edge filtering effect arises, which absorbs shorter wave light in each case than the said illuminating colours.
Claim 13
Dependent Claim
51 words
A light-emitting diode as defined in claim 10, wherein in order to achieve a green or shorter wave illuminating colours, the colour pigments are used such that the effect of an interference filter is formed so that the maximum interference effect is dependent on the wavelength of the respective illuminating colour.
Claim 14
Dependent Claim
16 words
A light-emitting diode structure as defined in claim 1 wherein said plastic material is a polycarbonate.
References Cited (Backward Citations)
US3510732A
Cited
US3555335A
Cited
US3593055A
Cited
US3694902A
Cited
US3711789A
Cited
US3805376A
Cited
US3774086A
Cited
US3869704A
Cited
US3919585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |