1. Department of Electrical Engineering, National Chung Hsing University, Taichung 40227, Taiwan
2. Taiwan Color Optics, Inc., 4F., 32, Keya Rd., Daya Dist., Taichung 42881, Taiwan
3. Graduate Institute of Optoelectronic Engineering, National Chung Hsing University, Taichung 40227, Taiwan
4. Optonomous Technologies, Inc., 5776 Lindero Canyon Road, Suite D-427, Westlake Village, California 91362, USA