| 摘要 |
<p>A current-reglated light emitting device for vehicle use includes a light emitting unit (1) and a current limiting unit (2). The current limiting unit (2) includes first and second switches (Q1, Q2) and first and second bias units. The first switch (Q1) is for making and breaking an electrical circuit between the light emitting unit (1) and an electric power source (4). The first bias unit is for causing the first switch (Q1) to conduct so as to activate the light emitting unit (1) when the first bias unit receives a drive voltage (V1) from the electric power source (4). The second bias unit is for causing the second switch (Q2) to conduct when amount of current flowing through the first switch (Q1) exceeds a predetermined threshold, thereby turning off the first switch (Q1) to interrupt current flow through the light emitting unit (1).</p> |
