发明名称 |
Light emitting system with light emitting power stabilization |
摘要 |
A light emitting system includes: a voltage detecting unit connected across a solid-state light emitting component for detecting a forward voltage thereof and generating a detection voltage having a magnitude dependent on the forward voltage; a current control unit connected to the light emitting component for controlling, according to a compensation voltage, flow of an operating current, which has a magnitude dependent on the compensation voltage, therethrough; and a compensation voltage module connected to the voltage detecting unit and the current control unit, disposed to receive a reference voltage, and configured to generate the compensation voltage, which varies according to the forward voltage, for provision to the current control unit according to the detection voltage, an operating voltage having a magnitude dependent on the operating current, and the reference voltage. |
申请公布号 |
US9078321(B2) |
申请公布日期 |
2015.07.07 |
申请号 |
US201213555666 |
申请日期 |
2012.07.23 |
申请人 |
Naitonal Chi Nan University |
发明人 |
Sun Tai-Ping;Wang Chia-Hung;Li Jia-Hao |
分类号 |
H05B33/08 |
主分类号 |
H05B33/08 |
代理机构 |
LeClairRyan |
代理人 |
LeClairRyan |
主权项 |
1. A light emitting system with light emitting power stabilization, comprising: a solid-state light emitting component having an anode and a cathode, one of which is disposed to receive an input voltage, and having a forward voltage that has a magnitude dependent on ambient temperature when driven under a constant current condition; and a power control device including a detection module including a voltage detecting unit connected electrically across said anode and said cathode of said solid-state light emitting component for detecting the forward voltage, and operable to generate a detection voltage according to the forward voltage detected by said voltage detecting unit, the detection voltage having a magnitude dependent on the forward voltage detected by said voltage detecting unit, and a current control unit connected electrically to the other of said anode and said cathode of said solid-state light emitting component, and operable to control flow of an operating current through said solid-state light emitting component according to a compensation voltage received by said current control unit, the operating current having a magnitude dependent on the compensation voltage received by said current control unit, said current control unit generating an operating voltage according to the operating current, the operating voltage having a magnitude dependent on the operating current, and a compensation voltage module connected electrically to said detection module for receiving the detection voltage and the operating voltage therefrom, disposed to receive a reference voltage, and configured to generate the compensation voltage for provision to said detection module according to the detection voltage, the operating voltage, and the reference voltage received by said compensation voltage module, the compensation voltage varying according to the forward voltage. |
地址 |
Nantou TW |