Multi-cell photovoltaic for a portable electronic device
US-2024272686-A1 · Aug 15, 2024 · US
Solar-powered electronic timepiece
US9019802B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9019802-B2 |
| Application number | US-201213688932-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 29, 2012 |
| Priority date | Dec 5, 2011 |
| Publication date | Apr 28, 2015 |
| Grant date | Apr 28, 2015 |
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Abstract
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The solar battery includes a plurality of cells having a same electromotive force with each other. The display device further includes a display means to display time, and a control means to control operation of the display means. The electromotive force of the solar battery is lower than a deterioration-start voltage of the rechargeable battery. The electromotive force of the cells is higher than a lower-limit driving voltage of the display device, in which a number of such cells equals a total number of cells include in the solar battery minus one. A driving voltage of the display means is lower than the aforementioned lower-limit driving voltage, and an operational voltage of the control means is lower than the aforementioned lower-limit driving voltage.
First claim
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What is claimed is: 1. A solar-powered electronic timepiece, comprising: a solar battery configured to generate electricity by incident light, the solar battery including a plurality of cells having a same electromotive force with each other, the electromotive force of each of the cells falling within a range having lower and upper limits in an illuminance environment above an illuminance level; a rechargeable battery configured to recharge by the electricity generated by the so…
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- What does patent US9019802B2 cover?
- The solar battery includes a plurality of cells having a same electromotive force with each other. The display device further includes a display means to display time, and a control means to control operation of the display means. The electromotive force of the solar battery is lower than a deterioration-start voltage of the rechargeable battery. The electromotive force of the cells is higher t…
- Who is the assignee on this patent?
- Seiko Epson Corp
- What technology area does this patent fall under?
- Primary CPC classification G04C10/02. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 28 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).