PWM LIGHT SOURCE INTERFERENCE-RESISTANT ILLUMINATION INTENSITY DETECTION METHOD, APPARATUS AND LIGHT SOURCE ADJUSTING METHOD

摘要

A PWM light source interference-resistant illumination intensity detection method, an apparatus, and a light source adjusting method, wherein the PWM light source interference-resistant illumination intensity detection apparatus comprises: a receiving module (1) used for receiving a pulse width modulation (PWM) signal of the PWM light source; and a detection module (2) used for sampling illumination in an environment when the PWM signal is in a low level and obtaining an illumination intensity in the environment according to the sampled illumination; wherein a PWM signal cycle is t, a sampling cycle is T=nt, and n is a positive integer. The illumination in the environment is sampled when the PWM signal is in a low level, namely, the illumination in the environment is sampled when the PWM light source is off, and the illumination intensity in the environment is obtained according to the sampled illumination, avoiding an influence on the illumination intensity in the environment when the PWM light source is on, so that the illumination intensity in the environment can be detected accurately.