Title:
SOLAR CELL FOR WATCH
Document Type and Number:
WIPO Patent Application WO/2021/039693
Kind Code:
A1
Abstract:
[Problem] To provide a solar cell used in superposition with a display panel of a watch, the solar cell enhancing the colors and the freedom of pattern of the display panel. [Solution] A solar cell 10 for a watch is provided with a colored layer 12 covering a light-receiving surface 11a of an electric power generation layer 11. In the electric power generation layer 11, the optical reflectance in a green region is a first reflectance, the optical reflectance in a blue region is a second reflectance higher than the first reflectance, and the optical reflectance in a red region is a third reflectance higher than the first reflectance. In the colored layer 12, the optical transmittance in the green region is a first transmittance, the optical transmittance in the blue region is a second optical transmittance lower than the first transmittance, and the optical transmittance in the red region is a third optical transmittance lower than the first transmittance. Thus, the colors of the electric power generation layer 11 and the colors of the colored layer 12 are in a complementary relationship with each other, whereby the chroma of reflected light B obtained from the electric power generation layer 11 through the colored layer 12 is decreased.
Inventors:
KANEMARU YOSHIKAZU (JP)
NAKANISHI KOUHEI (JP)
NAKANISHI KOUHEI (JP)
Application Number:
PCT/JP2020/031778
Publication Date:
March 04, 2021
Filing Date:
August 24, 2020
Export Citation:
Assignee:
TDK CORP (JP)
International Classes:
H01L31/0216
Foreign References:
| JPH098341A | 1997-01-10 | |||
| JPH0294575A | 1990-04-05 | |||
| JP2018018905A | 2018-02-01 | |||
| JP2006196532A | 2006-07-27 | |||
| JP2004207316A | 2004-07-22 | |||
| JP2001217444A | 2001-08-10 | |||
| JP2001044474A | 2001-02-16 | |||
| JP2004508729A | 2004-03-18 | |||
| US20140261624A1 | 2014-09-18 |
Attorney, Agent or Firm:
WASHIZU Mitsuhiro et al. (JP)
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