VEHICLE LAMP SYSTEM, AND CONTROLLER FOR SAME

A controller 300 pulse width modulation (PWM) controls multiple light-emitting pixels PIX1 through PIXn arranged in an array that form a variable light distribution lamp 200. A common counter 310 is provided in common for the multiple light-emitting pixels PIX1 through PIXn, and generates a common count value cv having a ramp waveform. A signal processing unit 320 generates multiple duty cycle instruction values for specifying the duty cycles of the multiple light-emitting pixels PIX1 through PIXn according to a light distribution instruction S1. Furthermore, the signal processing unit 320 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.