Key input circuit, power supply control apparatus, and power supply control method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 3, 2004
Grant Date -
N/A
app pub date -
Sep 25, 2000
filing date -
Sep 28, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A key switch 102 formed by arranging a plurality of key contacts SW11, SW12, SW21, SW22,--at cross points of a key matrix is provided with a power supply control key (SW11), and a key scan circuit 101 for detecting open/close states of the plural key contacts of the key switch 102 is independently arranged from a power supply control key state detecting means for detecting the open/close state of the contact SW11 of the power supply control key. The depression of the power supply control key (SW11) is detected by the power supply control key state detecting means. When the operation is ended, or the power supply is turned OFF, the depression of the power supply control key is detected by the key scan circuit 101, and the supply of the electric power is stopped.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully