US4907044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical emission device
Assignee: Siemens AG
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Filing: 1989-07-14
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Granted: 1990-03-06
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Expires: 2009-07-14
Abstract
Abstract An optical emission device with an emitter semiconductor chip and a cover intended to be suitable for backlighting areas, the device having a comparatively low structural height and low packing density. The cover has a light aperture formed using a convex and concave lens for radiating light in a solid angle of maximum size. This device can also be used in combination with an additional external reflector and diffusion screen.
Inventors
- 👤 Franz Schellhorn
- 👤 Guenter Waitl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:05
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/852; H10H20/853; H10W; H10W90/00; H10W90/701; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
112 words
An optical emission device for radiating light in a solid angle comprising: an emitter semiconductor chip positioned on an optical axis of the device; a cover having a light aperture which is composed of a concave lens for radiating light from the emitter semiconductor chip into a solid angle of maximum size, the concave lens intersecting the optical axis, the cover including a convex lens which is positioned around the concave lens, wherein the convex lens contacts the concave lens such that there is a smooth transition region between the lenses, the convex lens surrounding the border of the concave lens for uniformly distributing light into said solid angle of maximum size.
Claim 2
Dependent Claim
112 words
An optical emission device for radiating light in a solid angle comprising: an emitter semiconductor chip positioned on an optical axis of the device; a cover having a light aperture which is composed of a concave lens for radiating light from the emitter semiconductor chip into a solid angle of maximum size, the concave lens intersecting the optical axis, the cover including a convex lens which is positioned around the concave lens, wherein the convex lens contacts the concave lens such that there is a smooth transition region between the lenses, the convex lens surrounding the border of the concave lens for uniformly distributing light into said solid angle of maximum size.
Claim 3
Dependent Claim
27 words
The optical emission device of claim 1 wherein the curvature of the concave lens is substantially two times as large as the curvature of the convex lens.
Claim 4
Dependent Claim
18 words
The optical emission device of claim 1 further comprising a planar chip carrier for the emitter semiconductor chip.
Claim 5
Dependent Claim
18 words
The optical emission device of claim 2 further comprising a planar chip carrier for the emitter semiconductor chip.
Claim 6
Dependent Claim
15 words
The optical emission device of claim 1 wherein the emitter semiconductor chip has lambertain characteristics.
Claim 7
Dependent Claim
31 words
The optical emission device of claim 1 further comprising an external reflector, the external reflector surrounding the cover for deflecting the radiation emerging under a large angle out of the cover.
Claim 8
Dependent Claim
31 words
The optical emission device of claim 3 further comprising an external reflector, the external reflector surrounding the cover for deflecting the radiation emerging under a large angle out of the cover.
Claim 9
Dependent Claim
44 words
The optical emission device of claim 6 further comprising a diffusion screen fixed to the reflector, the diffusion screen being fixed to the external reflector in that region where the radiation leaves the reflector to make the radiation of the optical emission device homogeneous.
Claim 10
Dependent Claim
44 words
The optical emission device of claim 7 further comprising a diffusion screen fixed to the reflector, the diffusion screen being fixed to the external reflector in that region where the radiation leaves the reflector to make the radiation of the optical emission device homogeneous.
Claim 11
Dependent Claim
14 words
The optical emission device of claim 1 constructed as a surface mounted device component.
Claim 12
Dependent Claim
14 words
The optical emission device of claim 6 constructed as a surface mounted device component.
Claim 13
Dependent Claim
14 words
The optical emission device of claim 8 constructed as a surface mounted device component.
References Cited (Backward Citations)
US4560901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |