根據新聞報導，2008年9月8日美國Apeldyn公司在德拉瓦州聯邦地方法院，控告台灣友達、友達美國子公司、台灣奇美、奇美美國子公司、韓國三星電子、三星電子美國子公司、日本夏普、夏普美國子公司、日本索尼、索尼美國子公司等10家公司之LCD產品，侵犯Apeldyn US5,347,382專利。
US5,347,382重要資訊彙整如表一。
表一、US5,347,382重要資訊彙整
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專利號
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US5,347,382
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專利名稱
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Liquid crystal cell retarder with driving beyond retardance value and two cells for high speed
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申請日
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1992年04月23日
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政府關係
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This invention was made with Government support under Award Number ISI-9060190 awarded by the National Science Foundation. The Government has certain rights in this invention.
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摘要
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A fast response liquid crystal optical retarder system. A liquid crystal retarder system employs one or more liquid crystal cells and corresponding drive circuits. The drive circuits provide to the cell a rectangular wave ac voltage signal whose RMS voltage is controlled. To switch from one retardance to another, the voltage is increased or decreased beyond the voltage corresponding to the target retardance and then, prior to or when the target retardance is reached, the applied voltage is switched to the voltage corresponding to the target retardance. One or more pairs of liquid crystal cells provided sequentially along the path of light propagation and with their eigen-axis orthogonal to one another to increase or decrease the total retardance rapidly. The retarder system is incorporated in a polarization control system and in a fiber-optic link.
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第一獨立項
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1. An optical retarder system, comprising:
(a) first retarder means for controlling the retardance of light passing therethrough along a first eigen-axis thereof relative to a second eigen-axis thereof in response to the application of a first signal thereto; and
(b) first drive means, connected to said first retarder means, for supplying said first signal to said first retarder means, said drive means including first control means for changing said retardance from a first retardance to a second retardance by causing said first signal to change, in a direction to move toward said second retardance, from a first amplitude which is required for said first retardance to a second amplitude, beyond a third amplitude which is required for said second retardance, for a period of time, and then causing said first signal to change to the said second amplitude required for a second retardance.
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Source: 科技政策研究與資訊中心—科技產業資訊室整理，2008/09。
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(356字；表1)
後續追蹤報導：
針對本案 [1:08-cv-00568]系爭專利US5,347,382 ，原告被告進行專利權項建構(Claim Construction)後，2011年11月15日 法院對於被告請求即時判決(Summary Judgment)做出裁定(Order)，同意奇美(CMO)提出不侵權，否決友達(AUO)提出不侵權的提案。當提出Summary Judgment時，代表案件即將有結果，而由被告提出時，代表這結果可能對被告有利。
檔案下載：
專利權項建構(Claim Construction) 
Order Opinion/Decision
Order re: Summary Judgment Order
(科技產業資訊室-- May 編撰，2011/11/24)
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