| 摘要 |
An LED control circuit, comprising: a current source including a positive terminal and a negative terminal for providing a current; an LED, which is disposed on a first current path, including an anode and a cathode where the anode is connected to the positive terminal of the current source; an LED monitor including an input terminal and an output terminal where the input terminal is connected to the anode or the cathode of the LED; and a second current path connected in parallel to the first current path; wherein, when the LED monitor detects that the first current meets a target value, if the source current provided by the power source is greater than the target value, a second current divided from the source current flows through the second current path. |
| 主权项 |
1. An LED control circuit, comprising:
a current source including a positive terminal and a negative terminal for providing a source current; first to (N+1)-th current paths connected with each other in parallel, where N is a positive integer greater than one; first to N-th LEDs disposed on the first to N-th current paths, respectively each LED including a cathode and an anode terminal connected to the positive terminal of the current source; first to N-th LED monitors, each LED monitor including an input terminal an output terminal, wherein each input terminal of the first to N-th LED monitors correspondingly connected to the first to the N-th current paths to receive first to N-th currents; wherein, when the first LED monitor detects a first current meets a first target value, when the source current provided by the current source is greater than first target value, a first excess current is generated, and a second current flows through the second current path, wherein, when the N-th LED monitor detects a N-th current meets a N-th target value, when a (N−1)-th excess current divided from a (N−1)-th current is greater than the N-th target value, a N-th excess current is generated, and a (N+1)-th current flows through the (N+1)-th current path. |
