Title:
POWER SUPPLY SYSTEM, POWER RECEIVING SYSTEM, POWER TRANSMISSION SYSTEM, METHOD OF POWER TRANSMISSION, PORTABLE DEVICE AND TIMER DEVICE
Document Type and Number:
WIPO Patent Application WO/2000/038296
Kind Code:
A1
Abstract:
When a driver circuit (11) is energized by a power source (10) in a power supply system (A1) and generated a driving signal (V), an actuator (12) vibrates and the vibrations are transmitted through vibration transfer materials (14, 20) to a converter (21) of a power-receiving device (B1). The converter (21) includes a piezoelectric element for converting vibrations into voltage, and a voltage (Vg) appears. The voltage (Vg) is rectified by a rectifier circuit (23), and the rectified voltage charges a large capacitor (24), which in turn energizes a timer circuit (25) that measures time.
Inventors:
MIYAZAWA OSAMU (JP)
Application Number:
PCT/JP1999/004735
Publication Date:
June 29, 2000
Filing Date:
September 01, 1999
Export Citation:
Assignee:
SEIKO EPSON CORP (JP)
MIYAZAWA OSAMU (JP)
MIYAZAWA OSAMU (JP)
International Classes:
G04C10/00; G04C10/04; H01L41/107; H02J7/00; H02M3/28; (IPC1-7): H02J17/00; B06B1/06; B06B3/00; G04C10/04; H02J7/10
Domestic Patent References:
| WO1999049552A1 | 1999-09-30 |
Foreign References:
| JPS62297779A | 1987-12-24 | |||
| JPS50142051A | 1975-11-15 | |||
| US3591862A | 1971-07-06 | |||
| US4031449A | 1977-06-21 | |||
| EP0298707A2 | 1989-01-11 | |||
| JPH0210189A | 1990-01-12 | |||
| JPH07273697A | 1995-10-20 |
Other References:
See also references of EP 1079497A4
Attorney, Agent or Firm:
Kawasaki, Kenji (Yaesumasuya Building 2-16, Nihonbashi 3-chome Chuo-ku Tokyo, JP)
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