| 摘要 |
<p>The present invention provides a power supply circuit for an electrically powered device such as a light, including: switch means adapted to be closed by manual actuation; a capacitor connected to be charged when said switch is closed; and a discharge timing circuit arranged to discharge said capacitor to said electrically powered device over a predetermined time interval after said switch is opened. The present invention also provides a portable, touch-activated light which includes a power supply circuit that supplies electrical power to said light, the power supply circuit being adapted such that power supplied to said light gradually diminishes and ceases over a predetermined time interval. The present invention further provides a portable light including a switch means, that is activated by contact with a touch pad or by resistive touch across a pair of terminals, which enables a user to activate said switch means by placing a part of the body on the light without the need to expressly locate the switch means.</p> |
