US4196581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal wristwatch
Assignee: Suwa Seikosha KK
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Filing: 1977-08-11
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Granted: 1980-04-08
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Expires: 1997-08-11
Abstract
Abstract A liquid crystal display electronic wristwatch having a lamp therein to illuminate the liquid crystal display mounted in the watch case beneath the display panel so as to overlap with the display and cover glass in plan view. Wristwatches constructed and arranged in accordance with the invention may be of reduced size without having to reduce the size of the display panel.
Inventors
- 👤 Isao Nemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:15
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/0023; G04G9/0029; G04G9/0035; G04G9/0041; G04G9/0047
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
174 words
A liquid crystal display electronic wristwatch having a lamp therein comprising a watch case means formed with at least one opening, a liquid crystal display means positioned in said watch case means for viewing through said opening in said watch case means, said display means including an upper and a lower transparent glass plate and a liquid crystal material sealed therebetween, a reflection plate formed with an upwardly reflecting surface on the lower surface of said reflection plate positioned in said watch case means below the lower surface of said display means in plan view, and a lamp, said lamp being positioned in said case means so as to be beneath said display means and said reflection plate and to be in the peripheral portion of said display means when viewed in plan view and said reflection plate formed with a transparent portion in the lower reflecting surface in the region overlying said lamp and downwardly facing reflection means on the upper surface of said reflection plate in the region corresponding to said lamp.
Claim 2
Dependent Claim
174 words
A liquid crystal display electronic wristwatch having a lamp therein comprising a watch case means formed with at least one opening, a liquid crystal display means positioned in said watch case means for viewing through said opening in said watch case means, said display means including an upper and a lower transparent glass plate and a liquid crystal material sealed therebetween, a reflection plate formed with an upwardly reflecting surface on the lower surface of said reflection plate positioned in said watch case means below the lower surface of said display means in plan view, and a lamp, said lamp being positioned in said case means so as to be beneath said display means and said reflection plate and to be in the peripheral portion of said display means when viewed in plan view and said reflection plate formed with a transparent portion in the lower reflecting surface in the region overlying said lamp and downwardly facing reflection means on the upper surface of said reflection plate in the region corresponding to said lamp.
Claim 3
Dependent Claim
24 words
The wristwatch of claim 1, wherein a portion of said display means is opaque in the region corresponding to said lamp in plan view.
Claim 4
Dependent Claim
84 words
The wristwatch of claim 1, wherein said watch case means includes a watch case, a cover glass positioned in said opening in said watch case means and a parting plate positioned between said watch case and said cover glass, said parting plate being formed with an opening for viewing at least a portion of said display panel in said watch case means, and said parting plate being formed and said lamp being positioned so that said parting plate overlaps said lamp in plan view.
References Cited (Backward Citations)
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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) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |