发明名称 |
Drive circuit for at least one light-emitting diode |
摘要 |
A series connection consisting of a diode and one of two transistors of a transistor push-pull circuit is connected in parallel to the feed current path for a light-emitting diode and a capacitor is interconnected between the junction of the push-pull transistors and the junction between the light-emitting diode and an additional diode which is present in the feed current path. When the transistor in the series connection is in a blocking state, the light-emitting diode receives feed current and is thus switched to a light-emitting state. The capacitor causes a current pulse to be superimposed on the feed current during switchover for rapidly driving the light-emitting diode by decreasing the time span required by the light-emitting diode to reach a condition of maximum light emission.
|
申请公布号 |
US4485311(A) |
申请公布日期 |
1984.11.27 |
申请号 |
US19820385032 |
申请日期 |
1982.06.04 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
GOERNE, JAN;TRAULSEN, WILFRIED |
分类号 |
G08B5/36;G09G3/14;H03K17/0416;H03K17/60;H03K17/78;H04B10/155;(IPC1-7):H03K3/42;H03K3/26 |
主分类号 |
G08B5/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|