IP Library › Granted Patent US 11,073,621
Granted Patent B2
US 11,073,621 · App. 16/141,001 · Granted Jul 27, 2021

Electronic timepiece

Inventors: Norimitsu Baba (Shiojiri, JP); Keiichi Mukaiyama (Matsumoto, JP)
G01S19/35G01S19/14G04C10/02G04R20/04G04R60/10G04B19/06G04G19/02G04G21/04
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Quick Facts
Patent No.
US 11,073,621
App. No.
16/141,001
Granted
Jul 27, 2021
Kind
B2
Abstract

An electronic timepiece includes a dial, a solar battery on a rear surface side of the dial, and an antenna on a rear surface side of the solar battery so as to receive a radio wave. The solar battery includes a solar cell for generating power and a first non-power generating section which transmits the radio wave to the antenna. The solar cell includes a metal electrode, a semiconductor layer on the dial side of the metal electrode, and a transparent electrode on the dial side of the semiconductor layer. The metal electrode and the transparent electrode are excluded from the first non-power generating section, and the semiconductor layer is included within at least a portion of the first non-power generating section. The solar battery further includes a non-conductive member which regulates light transmittance on the dial side of the semiconductor layer in the first non-power generating section.

Claims (78)

1. An electronic timepiece comprising:

an optically transparent dial;

a solar battery disposed on a rear surface side of the dial; and

an antenna disposed on a rear surface side of the solar battery so as to receive a radio wave,

wherein the solar battery includes:

one or more solar cells for generating power; and

a first non-power generating section which transmits the radio wave to the antenna,

wherein each of the one or more solar cells includes a metal electrode, a semiconductor layer stacked on a dial side of the metal electrode, and a transparent electrode stacked on a dial side of the semiconductor layer,

wherein the metal electrode and the transparent electrode are excluded from the first non-power generating section, and the semiconductor layer is included within at least a portion of the first non-power generating section, and

wherein the solar battery further includes a non-conductive member which regulates light transmittance on the dial side of the semiconductor layer in the first non-power generating section.

2. The electronic timepiece according to claim 1 ,

wherein the solar battery includes a plurality of the solar cells,

wherein the solar battery includes a second non-power generating section located between an adjacent pair of the solar cells, the second non-power generating section being a cell division section,

wherein the metal electrode and the transparent electrode are excluded from the second non-power generating section, and

wherein the semiconductor layer is included within at least a portion of the second non-power generating section.

3. The electronic timepiece according to claim 2 ,

wherein a second non-conductive member which regulates light transmittance is disposed on the dial side of the semiconductor layer in the second non-power generating section.

4. The electronic timepiece according to claim 3 ,

wherein the non-conductive member disposed in the first non-power generating section and the second non-conductive member disposed in the second non-power generating section are formed of the same material.

5. The electronic timepiece according to claim 1 ,

wherein the solar battery includes a plurality of the solar cells,

wherein the solar battery includes a second non-power generating section located between an adjacent pair of the solar cells, the second non-power generating section being a cell division section,

wherein the metal electrode and the transparent electrode are excluded from the second non-power generating section, and

wherein the semiconductor layer is excluded from the second non-power generating section, the second non-power generating section having a width between an adjacent pair of solar cells that is equal to or smaller than a predetermined dimension.

6. The electronic timepiece according to claim 1 ,

wherein the one or more solar cells is disposed radially inward from an outer peripheral edge of the solar battery,

wherein the solar battery includes another non-power generating section located between a periphery of the one or more solar cells and the outer peripheral edge, and

wherein the metal electrode and the transparent electrode are excluded from the another non-power generating section, and the semiconductor layer is located within at least a portion of the another non-power generating section.

7. The electronic timepiece according to claim 6 ,

wherein another non-conductive member which regulates light transmittance is disposed on the dial side of the semiconductor layer in the another non-power generating section.

8. The electronic timepiece according to claim 7 ,

wherein the non-conductive member disposed in the first non-power generating section and the another non-conductive member disposed in the another non-power generating section are formed of the same material.

9. The electronic timepiece according to claim 1 ,

wherein the first non-power generating section overlaps the antenna in a plan view.

10. The electronic timepiece according to claim 1 ,

wherein the antenna is a patch antenna.

11. The electronic timepiece according to claim 1 ,

wherein the antenna is a patch antenna including a radiation electrode,

wherein the semiconductor layer and a discrete part of the transparent electrode are disposed inward of an outer peripheral edge of the radiation electrode in a plan view, and

the first non-power generating section surrounds the discrete part of the transparent electrode in the plan view.

12. The electronic timepiece according to claim 11 ,

wherein a discrete part of the metal electrode is disposed inward of the outer peripheral edge of the radiation electrode in the plan view.

13. The electronic timepiece according to claim 1 ,

wherein the first non-power generating section continuously extends to an outer peripheral edge of the solar battery in a plan view, and

the first non-power generating section overlapping the antenna in the plan view.

14. The electronic timepiece according to claim 1 ,

wherein an outer peripheral edge of the antenna is surrounded by the solar cell in a plan view.

15. The electronic timepiece according to claim 1 ,

wherein the solar battery includes a plurality of the solar cells,

wherein, in a plan view, the solar cells respectively have a shape surrounded by two edges radially extending from a plane center of the solar battery and an edge extending along an outer peripheral edge of the solar battery, and

wherein, in the plan view, the antenna is not overlapped by any part of any of the solar cells.

16. The electronic timepiece according to claim 1 ,

wherein the solar battery includes a plurality of the solar cells, and

wherein, in a plan view, the first non-power generating section is in contact with only one of the solar cells.

17. An electronic timepiece comprising:

an optically transparent dial;

a solar battery disposed on a rear surface side of the dial; and

an antenna disposed on a rear surface side of the solar battery so as to receive a radio wave,

wherein the solar battery includes:

one or more solar cells for generating power; and

a first non-power generating section which transmits the radio wave to the antenna,

wherein each of the one or more solar cells includes a metal electrode, a semiconductor layer stacked on a dial side of the metal electrode, and a transparent electrode stacked on a dial side of the semiconductor layer,

wherein the metal electrode and the transparent electrode are excluded from the first non-power generating section, and the semiconductor layer is included within at least a portion of the first non-power generating section, and

wherein the solar battery further includes a colored non-conductive member on the dial side of the semiconductor layer in the first non-power generating section.

18. An electronic timepiece comprising:

an optically transparent dial;

a solar battery disposed on a rear surface side of the dial; and

an antenna disposed on a rear surface side of the solar battery so as to receive a radio wave,

wherein the solar battery includes:

one or more solar cells for generating power; and

a first non-power generating section which transmits the radio wave to the antenna,

wherein the solar cell includes a metal electrode, a semiconductor layer stacked on a dial side of the metal electrode, a transparent electrode stacked on a dial side of the semiconductor layer, and a protective layer stacked on a dial side of the transparent electrode,

wherein the metal electrode and the transparent electrode are excluded from the first non-power generating section, and the semiconductor layer and the protective layer are included within at least a portion of the first non-power generating section, and

wherein the solar battery further includes a non-conductive member between the semiconductor layer and the protective layer in the first non-power generating section.

19. The electronic timepiece according to claim 18 ,

wherein the protective layer comprises a plurality of stacked layers.

20. The electronic timepiece according to claim 18 ,

wherein an absorbance index of the non-conductive member is higher than an absorbance index of the protective layer.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 23, 2018
From: BABA, NORIMITSU; MUKAIYAMA, KEIICHI
To: SEIKO EPSON CORPORATION
Reel/Frame 047274/0184 →
Priority Claims (2)
JP JP2017-185479 · Sep 26, 2017 · national
JP JP2018-124106 · Jun 29, 2018 · national
Continuity (1)
Related Publication 20190094384A1 · Mar 28, 2019