Patent US4247930A successfully refreshed from Google Patents.
US4247930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timepiece with hybrid display
Assignee: Gebrueder Junghans GmbH
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Filing: 1979-05-11
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Granted: 1981-01-27
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Expires: 1999-05-11
Abstract
Abstract An electronic timepiece, in particular, a battery-operated quartz wristwatch including a housing in which there is arranged an analog display mechanism as well as a liquid crystal display unit which facilitate a display of different time magnitudes. The display surface of the liquid crystal display is practically as large as the watch dial surface of the analog display mechanism. The liquid crystal display unit is arranged in the housing of the watch in front of so as to superimpose the analog display mechanism. Preferably, the liquid crystal display is transparent and constructed as a replacement for the usual watch crystal as the generally viewed protective cover for the watch housing.
Inventors
- 👤 Wolfram Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:35
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/0082
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
80 words
In an electronic timepiece, particularly a battery-operated quartz wristwatch, including a housing; an analog display mechanism and a liquid crystal display unit being arranged in said housing to facilitate the display of different time magnitudes; the improvement comprising: said liquid crystal display unit being arranged in said housing in front of and superimposed on said analog display mechanism and said liquid crystal display unit having a transparent construction and forming the housing cover on the viewed side of said timepiece.
Claim 2
Dependent Claim
80 words
In an electronic timepiece, particularly a battery-operated quartz wristwatch, including a housing; an analog display mechanism and a liquid crystal display unit being arranged in said housing to facilitate the display of different time magnitudes; the improvement comprising: said liquid crystal display unit being arranged in said housing in front of and superimposed on said analog display mechanism and said liquid crystal display unit having a transparent construction and forming the housing cover on the viewed side of said timepiece.
Claim 3
Dependent Claim
34 words
Electronic timepiece as claimed in claim 1, said liquid crystal display unit comprising two transparent plates; and a liquid crystal layer intermediate said plates, the exterior surfaces of said two plates forming polarization filters.
Claim 4
Dependent Claim
21 words
Electronic timepiece as claimed in claim 1, polarization filters being located in front of and behind said liquid crystal display unit.
Claim 5
Dependent Claim
59 words
Electronic timepiece as claimed in claim 1, said analog display mechanism comprising a plurality of indicator hands for indicating time; and said liquid crystal display unit including a plurality of display elements for displaying dates such as weekday, date, month and year, and adapted to also display an alarm, a timer or stop time in a preferably digital mode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |