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하드웨어 효율적인 확률 PWM 기반 LED 전광판 제어 방법
안진호(Jin-Ho Ahn),손경운(Kyoungwoon Son),김광연(Kwangyeon Kim) 한국정보기술학회 2011 한국정보기술학회논문지 Vol.9 No.11
In this paper, we propose a new PWM-dimming technique for an LED-type display to consider hardware cost. The proposed method is based on the stochastic PWM generation to reduce the peak current consumption of system with affordable hardware size. Experimental results show that the amount of current consumption and current variance of the proposed LED control module decreases remarkably just with slightly additional hardware overhead compared with an LED control module including a simple PWM generator. This means the EMI and thermal problem in a large-size LED display system can be resolved efficiently.