Patent US4218872A successfully refreshed from Google Patents.
US4218872A
Expired / Lapsed
US
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Display device for timepiece
Assignee: Suwa Seikosha KK
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Filing: 1978-07-12
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Granted: 1980-08-26
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Expires: 1998-07-12
Abstract
Abstract A display device for a timepiece comprises an apertured dial and an electro-optical display element affixed to said dial so that said display element can be viewed through said aperture. The display device also includes an insulation layer and electrodes on said insulation layer.
Inventors
- 👤 Toshimasa Ikegami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:06
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/0082; G04B; G04B19/00; G04B19/06; G04B19/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
123 words
A display device for an electronic timepiece, comprising: a dial having inner and outer portions, at least the inner portion of said dial being of an insulating material, said dial having a first aperture therein; hands for performing an analog display of time, said hands having axes passing through said first aperture; an electro-optic digital display element affixed directly to said inner portion of said dial and integral therewith, said display element including connecting terminal means and said dial having a second aperture therein for viewing of said display element; circuit means for activating said electro-optical display element; conductor means directly engaging said insulating inner portions of said dial for connecting said circuit means with said connecting terminal means of said display element.
Claim 2
Dependent Claim
123 words
A display device for an electronic timepiece, comprising: a dial having inner and outer portions, at least the inner portion of said dial being of an insulating material, said dial having a first aperture therein; hands for performing an analog display of time, said hands having axes passing through said first aperture; an electro-optic digital display element affixed directly to said inner portion of said dial and integral therewith, said display element including connecting terminal means and said dial having a second aperture therein for viewing of said display element; circuit means for activating said electro-optical display element; conductor means directly engaging said insulating inner portions of said dial for connecting said circuit means with said connecting terminal means of said display element.
Claim 3
Dependent Claim
64 words
The display device as defined in claim 1, wherein said dial has a recess in the inner portions thereof, said recess connecting with said second aperture, the area of said aperture being smaller than that of said display element, said display element being at least partly disposed within said recess, and the periphery of said display element extending beyond that of said second aperture.
Claim 4
Dependent Claim
45 words
The display device as defined in claim 2, wherein said display element includes an upper panel glass having said connecting terminal means and transparent electrodes thereon, at least said upper panel glass being disposed within said recess and thereby within the thickness of said dial.
Claim 5
Dependent Claim
41 words
The display device as defined in claim 1, wherein said electro-optical display element has two electrode plates, and one of said electrode plates lies within the thickness of said dial, the thickness of said electrode plate being less than 0.25 mm.
Claim 6
Dependent Claim
18 words
The display device as defined in claim 1, wherein said electro-optical display element is a liquid crystal cell.
Claim 7
Dependent Claim
17 words
The display device as defined in claim 1, wherein said electro-optical display element is an electro-chromic cell.
Claim 8
Dependent Claim
28 words
The display device as defined in claim 1, wherein said circuit means is connected with said display element for displaying digitally day and date by said display element.
Claim 9
Dependent Claim
25 words
The display device as defined in claim 1, further comprising resilient lead plate means for electrically connecting said conductor means with said connecting terminal means.
Claim 10
Dependent Claim
23 words
The display device as defined in claim 1, further comprising lead plate means for electrically connecting said circuit means with said conductor means.
Claim 11
Dependent Claim
26 words
The display device as defined in claim 1, wherein said inner and outer portions are both of insulating material and said dial is of one-piece construction.
Claim 12
Dependent Claim
21 words
The display device as defined in claim 1, wherein said outer portion and said inner portion are separate but contiguous members.
Claim 13
Dependent Claim
19 words
The display device as defined in claim 1, further comprising resin affixing said display means integrally with said dial.
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) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |