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As one of the key inventors behind CD, DVD, and Blu-ray technologies, Sony had long been actively engaged in the research and patenting of optical disc technologies. As shown in Fig. 30.1, Sony’s patent filings in this field peaked notably in 2 years: once in 1998 with 209 patent families, and again in 2003 with 194 families. After 2006, Sony’s patent activity in optical disc technologies dropped sharply. By 2011, annual filings fell below 50, and starting in 2015, the number dropped to single digits. What exactly happened at those time points?

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The Endgame of the Format War

  • 章节

  • 发表日期：

    2026年

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  • Qiang Yue,
  • Fei Yang

摘要

As one of the key inventors behind CD, DVD, and Blu-ray technologies, Sony had long been actively engaged in the research and patenting of optical disc technologies. As shown in Fig. 30.1, Sony’s patent filings in this field peaked notably in 2 years: once in 1998 with 209 patent families, and again in 2003 with 194 families. After 2006, Sony’s patent activity in optical disc technologies dropped sharply. By 2011, annual filings fell below 50, and starting in 2015, the number dropped to single digits. What exactly happened at those time points?