| 摘要 |
A light-emitting system includes first and second solid-state light-emitting components, a current source providing a constant current through the second solid-state light-emitting component, a first instrumentation amplifier detecting a second forward voltage across the second solid-state light-emitting component so as to generate a first detection voltage having a magnitude dependent on the second forward voltage, a compensation voltage module operable to generate a compensation voltage having a magnitude related to the second forward voltage according to the first detection voltage and two reference voltages, and a power control module detecting a first forward voltage across the first solid-state light-emitting component and providing a driving current therethrough that is dependent on the compensation voltage and the first forward voltage and that varies according to ambient temperature. |
