⚖ Oral Arguments, with Context

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Wuhan China Star Optoelectronics Semiconductor v. Samsung Display Co., Ltd. — Fed. Cir. (Oct 5, 2026)

No. 25-1517 Argued October 5, 2026 Published October 6, 2026

Wuhan China Star and other display companies challenge Samsung Display's patents on OLED screens. These screens use red, green, and blue light-emitting elements called pixels. Samsung's patents describe layouts intended to improve screen life and manufacturing reliability. The companies asked the Patent Trial and Appeal Board to cancel patent claims as obvious in light of earlier display designs. A claim specifies the invention protected by a patent. Obviousness asks whether that invention would have been obvious to an ordinarily skilled designer, using existing knowledge rather than hindsight. Three related patents are involved. The Board rejected the challenge to the patent ending in five seventy-eight, but found several claims of the related eight oh three patent unpatentable. The Federal Circuit now hears both sides' challenges to parts of those rulings. The opening dispute concerns a pixel-defining layer, a physical layer that defines the pixels' areas. The challengers say the Board overlooked what display designers already knew; Samsung disputes that reasoning. This is a review of patentability rulings, not a trial deciding whether a particular product infringes.

Wuhan China Star Optoelectronics Semiconductor v. Samsung Display Co., Ltd. (No. 25-1517) — U.S. Court of Appeals for the Federal Circuit, argued October 5, 2026.

Sources
Argument audio — U.S. Court of Appeals for the Federal Circuit:https://www.cafc.uscourts.gov/oral-arguments/25-1517_10052026.mp3
Official argument listing — Federal Circuit:https://www.cafc.uscourts.gov/home/oral-argument/listen-to-oral-arguments/
PTAB decision — IPR2023-00987, '803 patent (public copy):https://s3-us-west-1.amazonaws.com/ptab-filings/IPR2023-00987/46
Challengers' filed petition — IPR2023-00987 (public copy):https://s3-us-west-1.amazonaws.com/ptab-filings/IPR2023-00987/1
PTAB decision — IPR2023-01075, '578 patent (public copy):https://s3-us-west-1.amazonaws.com/ptab-filings/IPR2023-01075/46
Challengers' notice of appeal — IPR2023-01075 (public copy):https://s3-us-west-1.amazonaws.com/ptab-filings/IPR2023-01075/47
Samsung's filed notice identifying related appeals (public copy):https://s3-us-west-1.amazonaws.com/ptab-filings/IPR2025-01545/4
Inter partes review — USPTO explanation:https://www.uspto.gov/patents/ptab/trials/inter-partes-review

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