Title:
電子機器
Document Type and Number:
Japanese Patent JP6661810
Kind Code:
B2
Abstract:
A portable electronic device that can operate even when electric power supplied through contactless charge by electromagnetic induction is low is provided. The portable electronic device includes a reflective liquid crystal display which includes a transistor including an oxide semiconductor, a power source portion which includes a rechargeable battery capable of charge by contactless charge, and a signal processing portion which includes a nonvolatile semiconductor memory device. In the portable electronic device, electric power stored in the rechargeable battery is used in the reflective liquid crystal display and the signal processing portion.
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Inventors:
Shunpei Yamazaki
Jun Koyama
Jun Koyama
Application Number:
JP2019037179A
Publication Date:
March 11, 2020
Filing Date:
March 01, 2019
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
H02J7/00; G09F9/00; G09F9/30; G09G3/20; G09G3/36; H02J50/10
Domestic Patent References:
| JP2001197674A | ||||
| JP2000323670A | ||||
| JP200293924A |