发明名称 |
Infrared inductive light switch using triac trigger-control and early-charging-peak current limiter with adjustable power consumption |
摘要 |
An electronic switch can replace a standard mechanical light switch for 110-240 volt alternating-current (A.C.) devices. A triac switches the A.C. current to an A.C. device such as a light. A rectifier bridge generates a direct-current (D.C.) voltage that is applied to a special current limiter. The special current limiter generates a large current peak at low voltages, but limits current at high voltages. The large current peak from the special current limiter charges a capacitor when voltage is low at the beginning of each A.C. half-cycle, before the triac turns on. The capacitor has enough charge to supply D.C. current to an Infrared detector and trigger control logic for the rest of the A.C. half-cycle. When the detector detects a person nearby, it signals the trigger control logic. The D.C. voltage from the rectifier bridge is filtered to generate a sync pulse to the trigger control logic when adds a phase delay to the sync pulse which triggers the triac.
|
申请公布号 |
US6369517(B2) |
申请公布日期 |
2002.04.09 |
申请号 |
US20010681273 |
申请日期 |
2001.03.12 |
申请人 |
PERICOM TECHNOLOGY (SHANGHAI) CO., LTD. |
发明人 |
SONG QUN;LI JIAN;XIE FANG |
分类号 |
H05B37/02;H05B39/08;(IPC1-7):G05F1/00 |
主分类号 |
H05B37/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|