Mianyang BOE Optoelectronics Technology Co., Ltd. et al. v. Samsung Display Co., Ltd.

This case, IPR2025-01476, involves a patent validity challenge brought before the Patent Trial and Appeal Board (PTAB) by several prominent Chinese display manufacturers against Samsung Display Co., Ltd., a leading global display technology company. The petitioners are Mianyang BOE Optoelectronics Technology Co., Ltd. (a subsidiary of BOE Technology Group Co., Ltd.), Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. (part of TCL China Star Optoelectronics Technology), Tianma Microelectronics Co. Ltd., and Visionox Technology, Inc.. These companies are all major operating entities deeply involved in the design, manufacturing, and supply of various display solutions, including LCD and advanced OLED panels for applications such as smartphones, wearables, automotive, and IT displays. The patent owner, Samsung Display Co., Ltd., a spin-off from Samsung Electronics, is a dominant force in the display market, particularly known for its OLED and QD-OLED technologies used across consumer electronics.

The patent at issue is U.S. Patent No. 10,541,279. This patent generally pertains to display devices and methods for manufacturing them, with a focus on improving display performance and manufacturing efficiency, likely within the context of OLED technology given the industry of the parties. While an IPR directly challenges the patentability of claims rather than specific infringing products, the underlying technology relates to critical components and structures in modern display panels, particularly those found in advanced mobile and consumer electronic devices.

This IPR was filed with the Patent Trial and Appeal Board (PTAB) of the U.S. Patent and Trademark Office (USPTO), an administrative tribunal specializing in reviewing patent validity. The PTAB serves as an important venue for challenging patent claims on grounds of prior art, offering an alternative to more protracted and costly district court litigation. The case is particularly notable as it is part of a broader, high-stakes intellectual property dispute between Samsung Display and several Chinese display manufacturers, predominantly BOE, concerning advanced OLED display technologies. This dispute included numerous parallel litigations, such as complaints filed at the U.S. International Trade Commission (ITC) and in district courts. The multi-front legal battle, centered on proprietary OLED stack structure and pixel arrangement technologies, had significant market implications, with a preliminary ITC ruling in a related case threatening to impose a lengthy import ban on BOE's OLED panels into the U.S.. The "Settlement" status of IPR2025-01476 aligns with the broader resolution of these disputes in late 2025, where Samsung Display and BOE, along with other involved Chinese display makers, reached a confidential global settlement, leading to the termination of various pending lawsuits and investigations.

This IPR case, IPR2025-01476, is part of a larger, complex intellectual property dispute between Samsung Display and several Chinese display manufacturers, including BOE. While the specific legal developments for IPR2025-01476 are not extensively detailed in public records beyond its "Settlement" status, the broader context of the dispute provides insights into the likely trajectory and resolution of this particular IPR.

Key Legal Developments and Outcome:

• Underlying Patent Litigation and Parallel Proceedings: The IPR proceeding (IPR2025-01476) concerning U.S. Patent No. 10,541,279 was initiated by Mianyang BOE Optoelectronics Technology Co., Ltd. and other petitioners against Samsung Display Co., Ltd. This IPR was filed in response to broader patent infringement allegations made by Samsung Display. Samsung Display initiated legal action against BOE in the U.S. International Trade Commission (ITC) in December 2022, alleging infringement of four patents related to OLED display panels. Concurrently, Samsung Display filed a patent infringement lawsuit against BOE in the U.S. District Court for the Eastern District of Texas in December 2023, asserting five OLED-related patents, including US10,541,279. In response, BOE and other manufacturers filed invalidation requests, including IPRs, against Samsung Display's asserted patents with the PTAB.
• Filing & Initial Pleadings (IPR): IPR2025-01476 was filed by Mianyang BOE Optoelectronics Technology Co., Ltd., Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Tianma Microelectronics Co. Ltd., and Visionox Technology, Inc. challenging U.S. Patent No. 10,541,279 owned by Samsung Display Co., Ltd. The specific filing date for IPR2025-01476 is not explicitly stated in the provided information, but the IPR was accepted along with other similar requests from BOE.
• Parallel PTAB IPR/PGR Proceedings and Their Effect: The PTAB has seen numerous IPRs filed by BOE against Samsung Display's patents. For instance, on January 6, 2025, the PTAB issued final results for IPRs challenging two Samsung Display patents, initiated by BOE, where most claims were invalidated. The trend in PTAB decisions regarding "settled expectations" also became a significant factor during this period, with the USPTO acting Director issuing decisions in June 2025 denying institution of IPRs based on this doctrine, particularly for older patents where petitioners had early knowledge. However, a later decision on February 27, 2026, saw the Director deny a patent owner's request for discretionary denial, citing the petitioner's "well-settled expectation" due to a decade-long business relationship with the original patent owner.
• Settlement: The overarching dispute between Samsung Display and the Chinese display manufacturers, including BOE, reached a confidential global settlement in late 2025. This settlement led to the termination of various pending lawsuits and investigations, including those at the ITC and in district courts. For IPR2025-01476, the "Settlement" status indicates that this IPR was resolved as part of this broader agreement. On November 17, 2025, Samsung Display and the respondents (including BOE) filed a joint motion to stay and terminate an ITC investigation based on a confidential settlement agreement. A revised joint motion was filed on November 25, 2025, and the ITC subsequently granted the motion to terminate the investigation. This timing aligns with the settlement status of IPR2025-01476, strongly suggesting its resolution was encompassed by this global settlement.

Given the settlement status, there were likely no public developments related to pre-trial motions, claim construction, discovery, trial events, or appeals for IPR2025-01476. The settlement effectively concluded the proceedings before these stages could be reached.

The petitioners in IPR2025-01476, Mianyang BOE Optoelectronics Technology Co., Ltd., Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Tianma Microelectronics Co. Ltd., and Visionox Technology, Inc., were represented by counsel from several law firms. Based on related patent litigation and PTAB proceedings, the following attorneys have appeared for the petitioners:

For Mianyang BOE Optoelectronics Technology Co., Ltd., Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Tianma Microelectronics Co. Ltd., and Visionox Technology, Inc.:

• Xiang Wang Ph.D. (Lead Counsel)
  • Firm: Orrick, Herrington & Sutcliffe LLP (Likely Washington D.C. or New York office, given the nature of the dispute and Orrick's IP presence)
  • Note: Dr. Wang has extensive experience in U.S. litigation, particularly for Chinese state-owned enterprises, and has been involved in significant ITC and patent litigation matters for BOE.
• Bas DE Blank Esq. (Counsel)
  • Firm: Orrick, Herrington & Sutcliffe LLP (Likely Washington D.C. or New York office)
  • Note: Mr. De Blank has also represented the petitioners in related appeals at the U.S. Court of Appeals for the Federal Circuit.

Other firms and attorneys with relevant experience who frequently represent the listed petitioners in patent matters, and may have been involved in this IPR or parallel proceedings, include:

• Fish & Richardson P.C.
  • Note: Fish & Richardson is a prominent intellectual property law firm with a substantial PTAB practice, handling more IPR proceedings than any other firm. They represent both petitioners and patent owners in a wide range of technologies.
• Wilmer Cutler Pickering Hale and Dorr LLP (WilmerHale)
  • Note: WilmerHale has a strong intellectual property litigation practice, including significant experience with IPR proceedings before the PTAB and appeals to the Federal Circuit.
• Finnegan, Henderson, Farabow, Garrett & Dunner, LLP (Finnegan)
  • Note: Finnegan is a leading full-service intellectual property firm with a strong PTAB practice, representing clients in patent litigation, IPRs, and other post-grant proceedings, including a substantial client base in Asia.
• White & Case LLP
  • Note: White & Case has an intellectual property team with experience in PTAB and IPR proceedings, often leveraging technical and engineering expertise for complex disputes.
• Troutman Pepper Hamilton Sanders LLP
  • Andrew P. Zappia (Counsel)
  • Note: Mr. Zappia is highly experienced in IPR practice before the PTAB, having served as litigation counsel in over 40 IPR proceedings for both patent owners and petitioners across various technology areas.

It is important to note that while the specific counsel for IPR2025-01476 is often listed on the PTAB's Patent Trial and Appeal Case Tracking System (P-TACTS), a specific docket entry for this IPR detailing the appearances was not immediately available through general web searches. The information above is drawn from publicly available records for related cases involving these parties, including appeals to the Federal Circuit and district court litigation, where these attorneys represented the same or closely allied entities in the broader dispute against Samsung Display.

Samsung Display Co., Ltd., as the patent owner (defendant) in IPR2025-01476, would have been represented by counsel specializing in patent defense before the PTAB. While specific counsel for this IPR are not explicitly listed in easily accessible public records, common attorneys and firms representing Samsung in similar patent and PTAB disputes can be identified.

Based on related cases and Samsung's frequent legal representation in intellectual property matters, the following attorneys and firms are likely candidates for representing Samsung Display Co., Ltd.:

For Samsung Display Co., Ltd.:

• William M. Fink Esq. (Counsel)
  • Firm: O'Melveny & Myers LLP. (Firm has offices in New York, Washington D.C., and California, among others).
  • Note: Mr. Fink has represented Samsung in PTAB proceedings and related appeals, including arguments before the Federal Circuit concerning IPRs.
• Benjamin Haber Esq. (Counsel)
  • Firm: O'Melveny & Myers LLP.
  • Note: Mr. Haber has represented Samsung Electronics America, Inc. and Samsung Display Co., Ltd. in patent infringement cases, particularly in the Eastern District of Texas.
• Melissa Richards Smith Esq. (Lead Counsel / Local Counsel)
  • Firm: Gillam & Smith LLP (Marshall, Texas).
  • Note: Ms. Smith is lead counsel in the Eastern District of Texas and has frequently represented Samsung entities, including Samsung Display, in patent defense.
• Sean S. Pak Esq. (Counsel)
  • Firm: Quinn Emanuel Urquhart & Sullivan, LLP (Firm has various offices including Silicon Valley and Washington D.C.).
  • Note: Mr. Pak has represented Samsung Display in ITC complaints and Samsung in other patent infringement and IPR matters.
• Michael McKeon Esq. (Litigation Principal)
  • Firm: Fish & Richardson P.C. (Likely Washington D.C. office).
  • Note: Mr. McKeon has secured Federal Circuit reversals on behalf of Samsung in patent infringement disputes. Fish & Richardson P.C. frequently represents Samsung in patent matters, including PTAB proceedings.
• Christian Chu Esq. (Counsel)
  • Firm: Fish & Richardson P.C.
  • Note: Mr. Chu has extensive experience in intellectual property, licensing, arbitration, and litigation across various technical areas, including displays. He has represented Samsung Electronics in enforcing patents related to liquid crystal display at the ITC.
• Joseph V. Colaianni Esq. (Counsel)
  • Firm: Fish & Richardson P.C.
  • Note: Mr. Colaianni has served as lead counsel in numerous Section 337 investigations at the ITC and has represented Samsung in patent infringement actions related to various technologies, including liquid crystal displays and wireless communications.
• Mark D. Selwyn Esq. (Partner)
  • Firm: Wilmer Cutler Pickering Hale and Dorr LLP (WilmerHale) (Palo Alto, California).
  • Note: Mr. Selwyn represented Apple in its global patent war with Samsung, but WilmerHale generally has a strong intellectual property litigation practice and represents both patent owners and challengers in IPR proceedings. It is important to note that law firms can represent different parties in different cases, and a firm's general expertise in patent litigation suggests their potential involvement.
• Alexander Hyung-Joon Lee Esq. (Counsel)
  • Firm: White & Case LLP (Silicon Valley office).
  • Note: Mr. Lee focuses on intellectual property litigation, including patent litigation and PTAB-related proceedings, for various high-tech industries including display systems. White & Case has been involved in transactions related to Samsung Display.
• Finnegan, Henderson, Farabow, Garrett & Dunner, LLP (Finnegan)
  • Note: Finnegan frequently represents Samsung in patent litigation, including cases involving touch-screen functionality on mobile phones. Attorneys such as Biju I. Chandran, Joseph M. Schaffner, and Alexander M. Boyer are listed as related professionals for Samsung cases at Finnegan. Christopher C. Johns also has experience with IPRs and ITC investigations related to display screens.
• Covington & Burling LLP
  • Note: This firm represented Samsung Display in a complaint against BOE. Specific attorneys include Jeffrey H. Lerner, Jared R. Frisch, Daniel W. Cho, Kee Young Lee, Robert T. Haslam, Scott A. Schrader, Jesse Y. Chang, and Sean Hong.

It is worth noting that while several firms and attorneys have a history of representing Samsung entities in patent disputes, the precise counsel for a specific IPR proceeding would be officially recorded on the PTAB's P-TACTS system. Given the "Settlement" status of IPR2025-01476, the detailed attorney appearances might not be as readily available through general public searches as they would be for cases that proceeded further through litigation.