| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform a light control lighting of a brake lamp with light intensity according to a deceleration degree by generating a driving signal having a duty ratio according to a value of a deceleration detection signal and performing a light control lighting of the brake lamp. SOLUTION: A brake lamp switch 2 detects the working of a brake pedal and becomes its closed state when the brake pedal is worked. A deceleration/ acceleration detection part 3 detects deceleration of a vehicle and generates a deceleration detection signal having a value according to the deceleration degree when the vehicle is decelerated. A brake lamp control part 6 operates a power transistor 5 and generates a driving signal from battery voltage when the brake lamp switch 2 becomes its closed state and operates the power transistor 5 and generates the driving signal with duty ratio according to the value of the deceleration detection signal when a deceleration detection signal is detected from the deceleration/acceleration detection part 3. A brake lamp 7 is lighted with light intensity according to the power value of the driving signal outputted from the brake lamp control part 6.</p> |
