US5940215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discretely applied diffusor structure on lightguides
Assignee: BlackBerry Ltd
•
Filing: 1998-12-15
•
Granted: 1999-08-17
•
Expires: 2018-12-15
Abstract
Abstract A applied diffusor structure for lightguides fabricated out of a flexible transparent film substrate. The substrate having high resolution complex patterns printed on the surface of the substrate using any high resolution printing process. The substrate affixed to the lightguide using a transparent adhesive or alternatively the substrate is molded to the lightguide.
Inventors
- 👤 Charles Albert Rudisill
- 👤 Sean Patrick Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:49
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0065; G02B5/00; G02B5/02; G02B5/0205; G02B5/021; G02B5/0226; G02B5/0268; G02B6/0033; G02B6/005; G02B6/0051
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
51 words
A diffusor structure for a lightguide, comprising: a planar film substrate; a diffusor pattern printed on a rear surface of the substrate; means for fixing the substrate to a rear surface of the lightguide; and wherein the diffusor pattern is printed on the substrate with a printing material containing translucent particles.
Claim 2
Dependent Claim
51 words
A diffusor structure for a lightguide, comprising: a planar film substrate; a diffusor pattern printed on a rear surface of the substrate; means for fixing the substrate to a rear surface of the lightguide; and wherein the diffusor pattern is printed on the substrate with a printing material containing translucent particles.
Claim 3
Dependent Claim
14 words
The diffusor structure recited in claim 1, wherein the planar film substrate is transparent.
Claim 4
Dependent Claim
40 words
The diffusor structure recited in claim 1, wherein the means for affixing the substrate to the rear surface of the lightguide comprises a transparent adhesive positioned between the front surface of the substrate and the rear surface of the lightguide.
Claim 5
Dependent Claim
28 words
The diffusor structure recited in claim 1, wherein the means for affixing the substrate to the rear surface of the lightguide comprises molding the substrate to the lightguide.
Claim 6
Dependent Claim
23 words
The diffusor structure recited in claim 1, wherein the diffusor pattern is printed on the substrate with a printing material containing opaque particles.
Claim 7
Dependent Claim
23 words
The diffusor structure recited in claim 1, wherein the diffusor pattern is printed on the substrate with a printing material containing white paint.
Claim 8
Dependent Claim
27 words
The diffusor structure recited in claim 1, wherein the diffusor pattern is a multi-colored pattern printed on the substrate with multiple printing materials containing corresponding multi-colored paints.
Claim 9
Dependent Claim
21 words
The diffusor structure recited in claim 1, wherein the substrate is flexible to affix to a non-planar surface of the lightguide.
References Cited (Backward Citations)
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US5148309A
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US5619351A
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US5600456A
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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) | 2002-08-16 | 2003-02-15 | 2003-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-16 | 2007-02-15 | 2007-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-16 | 2011-02-15 | 2011-08-17 | $7700.00 | Window Closed / Lapsed |