参考文献

Hong, Pao-Chiung; Chen, Li-Jung; Lu, Yann-Yu; Lai, Tzu-Yun; Yang, Huei-Ru; Kao, Yi-Feng; Lai, Kuei-Tai; Lin, Young-Sun Patent: US2009/163494 A1, 2009 ; Location in patent: Page/Page column 10-11 ; US 20090163494 A1