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http://dx.doi.org/10.5573/ieie.2016.53.9.129

An Optical Quenching and Efficiency of Laser for the Virtual Display System  

Chi, Yongseok (Division of Mechatronics Engineering, Dongseo University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.53, no.9, 2016 , pp. 129-134 More about this Journal
Abstract
This paper studies the high frequency PWM (pulse width modulation) driving technique to increase an optical efficiency and to prevent an optical color quenching of blue laser for head up display on vehicles using digital micro mirror device (DMD) panel and yellow phosphor wheel. The proposed approach adaptively drives the current pulse width modulated signals of high optical power of blue laser to increase the lifetime and to decrease the stem temperature of laser. This method stabilizes the temperature of laser according to the driving environment and the forward current capacity. By the proposed method, the brightness of blue laser is improved by about 37% compared to the continuous waveform current driving method.
Keywords
헤드업 디스플레이;허상 디스플레이;프로젝션 시스템;청색 레이저;
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