Automotive lamp system
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United States of America
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Dec 31, 2024
Grant Date -
Jan 19, 2023
app pub date -
Sep 23, 2022
filing date -
Sep 23, 2022
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Abstract
A controller pulse width modulation (PWM) controls multiple light-emitting pixels arranged in an array that form a variable light distribution lamp. A common counter is provided in common for the multiple light-emitting pixels, and generates a common count value having a ramp waveform. A signal processing unit generates multiple duty cycle instruction values for specifying the duty cycles of the multiple light-emitting pixels according to a light distribution instruction. Furthermore, the signal processing unit stores multiple offset values that correspond to the multiple light-emitting pixels, generates an individual count value for each light-emitting pixel by adding the corresponding offset value to the common count value, and generates individual PWM signals pwm1 through pwmn that correspond to results of comparison between the individual count values and the corresponding duty cycle instruction values.
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