Litigation

BOE Technology Group Co., Ltd. et al. v. Samsung Display Co., Ltd.

pending

25-1519

Patents at issue (1)

11594578

Summary

Pending Federal Circuit appeal by BOE, CSOT, Tianma, and Visionox from PTAB decisions upholding Samsung Display patents, including the ’578 final written decision in IPR2023-01075. Companion IPR appeals are 25-1517, 25-1518, 25-1520, and 25-1521. No 2026 Federal Circuit opinion or Rule 36 judgment on the ’578 was found.

Case overview & background

Plain-language overview of the case: parties, accused product, patents at issue, and why the suit matters.

I'll research this case across multiple sources before drafting.

Case Overview

Parties and their roles. This is an operating-company-versus-operating-company dispute, not an NPE/PAE case. The appellee/patent owner is Samsung Display Co., Ltd. (Yongin, Korea), the world's largest maker of small- and medium-sized OLED panels and a key Apple and Samsung Electronics supplier (its Rule 7.1 disclosures identify Samsung SDI and Samsung Electronics as corporate parents, E.D. Tex. No. 2:23-cv-00309, Dkt. 2). The appellants are four Chinese display manufacturers that are direct competitors: Mianyang BOE Optoelectronics Technology Co. (an affiliate of BOE Technology Group), Wuhan China Star Optoelectronics Semiconductor Display Technology Co. (CSOT, the panel arm of TCL), Tianma Microelectronics Co., and Visionox Technology, Inc. All four jointly filed the IPR petitions that produced these appeals — an unusual pooling of resources among competitors against a common rival. On appeal, the appellants' entries of appearance list Melanie L. Bostwick, Travis Jensen, Richard Martinelli, Bas de Blank, Xiang Wang, Jonas Q. Wang, and Harmann Singh (Bostwick and de Blank are Orrick partners, and Orrick publicly represented BOE in the parallel ITC case); Samsung Display's counsel of record are Jeffrey H. Lerner, Scott C. Weidenfeller, Richard L. Rainey, and Matthew A. Kudzin (see Justia docket for No. 25-1519, https://dockets.justia.com/docket/circuit-courts/cafc/25-1519).

Accused technology. Samsung Display accuses the appellants' active-matrix OLED (AMOLED) display panels and modules for mobile devices — chiefly smartphone display panels, including panels incorporated into third-party handsets and into aftermarket/refurbished replacement screens sold by U.S. wholesalers. In ITC Inv. No. 337-TA-1351 the accused category was defined as "active matrix organic light-emitting diode ('AMOLED') display panels and modules used as replacement displays for mobile devices" (see ITC Order No. 28 at 2–3, Inv. No. 337-TA-1351 (Sept. 11, 2023)). In the later E.D. Va. action, Samsung Display identified OLED displays in phones such as the Nubia Z60 Ultra and REDMAGIC 9S Pro purchased in the district (E.D. Va. No. 1:25-cv-00908, Dkt. 1 ¶¶ 12–15). In Samsung's June 2025 suit against CSOT, the accused panels were those CSOT supplied to TCL, Ultimate E-Shop, and eTech Parts Plus.

Patents at issue. The appeal at No. 25-1519 concerns only U.S. Patent No. 11,594,578 B2, "Pixel arrangement structure for organic light emitting display device" (issued Feb. 28, 2023; priority Mar. 6, 2012; inventor Sang-Shin Lee). Claim 1 recites a "diamond"/RGBG-type pixel layout in which a first pixel's center coincides with the center of a virtual square and second and third pixels sit at neighboring vertices of that square — a sub-pixel geometry aimed at brightness, lifetime, and resolution tradeoffs in high-density OLED panels. The four companion patents that traveled with it through the ITC and district court are U.S. 9,818,803 and U.S. 10,854,683 (both further "diamond pixel" arrangement patents), U.S. 7,414,599 (an OLED pixel circuit that self-compensates threshold-voltage drift of the driving TFT), and U.S. 9,330,593 (a cascaded scan-driver/emission circuit). The '803 and '683 are the subjects of appeals 25-1517 and 25-1518 (with Samsung's cross-appeals at 25-1520 and 25-1521, since the Board invalidated most claims of each but upheld claim 5 of the '803 and claim 2 of the '683); the '599 and '593 were addressed in separate IPRs (e.g., IPR2023-009

Key legal developments & outcome

Major rulings, motions, claim construction, settlements, and the present posture or final disposition.

I'll research this case carefully. Note at the outset that the metadata describes a Federal Circuit appeal from PTAB IPR decisions, not a district-court infringement trial — so I'll need to verify what litigation track(s) actually exist and flag the distinction.

This is a multi-front dispute. Let me dig into the PTAB docket, the district court tracks, and whether the Federal Circuit appeals were resolved after the reported November 2025 settlement.

Major development found: a November 2025 global settlement. I need to verify what that did to the Federal Circuit appeals and pin down the district court dates and IPR numbers.

Plaintiff representatives

Counsel of record for the plaintiff(s): attorneys, firms, and roles (lead counsel, of counsel, local counsel).

I'll research the docket and counsel appearances for this Federal Circuit appeal.

Bottom line

This is a Federal Circuit appeal, not a district-court case, so the "plaintiffs" appear as Appellants (the IPR petitioners: Mianyang BOE, Wuhan China Star/CSOT, Tianma, and Visionox). The operative appearance is a single Entry of Appearance filed March 25, 2025 (Dkt. 6 in No. 25-1519), listing seven attorneys, all entering for all four appellant entities. Consol. Order, Dkt. 10 (Mar. 27, 2025) makes No. 25-1517 the lead appeal (with -1518, -1519, -1520, -1521), and the parties were directed to file all documents in the lead appeal only — so any later appearances/additional counsel will appear on the 25-1517 docket rather than 25-1519.

Per the Justia docket snapshot (last retrieved Apr. 24, 2025): Mianyang BOE Optoelectronics Technology Co., Ltd. v. Samsung Display Co., Ltd., No. 25-1519 (Fed. Cir.), Dkt. 6 ("Entry of Appearance for Melanie L. Bostwick; Travis Jensen; Richard Martinelli; Bas de Blank; Xiang Wang; Jonas Q. Wang; Harmann Singh as counsel for Appellants…"); Dkt. 9 (Docketing Statement, filed by M. Bostwick); Dkt. 10 (consolidation order); Dkt. 12 (certified list received Apr. 24, 2025). https://dockets.justia.com/docket/circuit-courts/cafc/25-1519

Caption caveat: the Justia/PACER caption for 25-1519 is Mianyang BOE Optoelectronics Technology Co., Ltd. v. Samsung Display Co., Ltd., with appellants listed as Mianyang BOE, Wuhan China Star, Tianma, and Visionox — BOE Technology Group Co., Ltd. is not named as an appellant on this docket entry, even though the case metadata lists it as a plaintiff. The IPR petitioner in IPR2023-01075 was Mianyang BOE (with BOE Technology Group and the other three panel makers as real parties/co-petitioners in the related IPRs). Anyone relying on this for a filing should reconcile the party list against the 25-1517 lead docket.

Appellants' counsel of record (Dkt. 6, No. 25-1519)

Attorney Role Firm / office Experience note
Melanie L. ("Mel") Bostwick Lead appellate counsel — first-listed on the Entry of Appearance and the attorney who filed the Docketing Statement (Dkt. 9); appears to be the responsible attorney for the consolidated appeals Orrick, Herrington & Sutcliffe LLP — Washington, D.C. (2100 Pennsylvania Ave. NW) Partner, Supreme Court & Appellate group; practice centered on Federal Circuit patent appeals and PTAB work; former law clerk to Judge Timothy B. Dyk (Fed. Cir.). Lead counsel in Juno Therapeutics v. Kite Pharma (Fed. Cir. 20-1758) ($1.2B verdict vacated), Rex Medical v. Intuitive Surgical (Fed. Cir. 24-1072), Broadcom v. Netflix (N.D. Cal.), and multiple IPR appeals; Chambers USA Band 3 (IP). https://www.orrick.com/export/MelBostwick.pdf
Bas de Blank Trial/technical lead counsel (of counsel on the appeal) Orrick — Silicon Valley / Menlo Park, CA (1000 Marsh Road) Longtime Orrick ITC and patent trial lawyer; former head of Orrick's ITC practice; has led 30+ IPRs and first-chaired a dozen-plus PTAB trials; counsel in the Sonos v. Google ITC case (import ban) and Brocade v. A10 Networks; Chambers USA Band 5 (Section 337). He is the Orrick partner most likely to have been the PTAB-side lead in IPR2023-01075. https://www.orrick.com/export/BasdeBlank.pdf
Harmann Singh Appellate associate (briefing/oral argument support) Orrick — Supreme Court & Appellate group; Washington, D.C. (also listed as New York in some firm profiles) Managing/Senior Associate; IP and trade-secret appeals; clerked for Justice Sotomayor (2023 Term), Judge Raymond Lohier (2d Cir.), and Judge Andrew Carter (S.D.N.Y.); adjunct professor at Georgetown Law; also on the Orrick team in Broadcom v. Netflix (Fed. Cir. 25-1740). https://www.orrick.com/People/6/9/D/Harmann-Singh
Travis Jensen Of counsel / team member (same omnibus appearance) Firm affiliation not independently verified in the sources reviewed; the appearance was filed by Orrick and Orrick's public statements describe it as counsel to BOE in this dispute No verified public bio located in this review — do not attribute specific past cases without confirmation.
Richard Martinelli Of counsel / team member (same omnibus appearance) Firm affiliation not independently verified in the sources reviewed (appeared jointly with the Orrick team) No verified public bio located in this review.
Xiang Wang Of counsel / team member — likely the China-facing/client-relationship and Mandarin-language interface role given the client group Firm affiliation not independently verified in this review (appeared jointly with the Orrick team) No verified public bio located in this review.
Jonas Q. Wang Of counsel / team member (same omnibus appearance) Firm affiliation not independently verified in this review (appeared jointly with the Orrick team) No verified public bio located in this review.

Important qualification on the last four names

Federal Circuit practice is that a single Entry of Appearance typically lists attorneys from the same firm, and this entry was filed by Orrick (Dkt. 6, submitted by M. Bostwick; Dkt. 9 docketing statement also under her name). Orrick's March 21, 2025 press release confirms it represented BOE Technology in the parallel ITC Investigation No. 337-TA-1351, and Orrick partners (de Blank, Bostwick) are on the Federal Circuit appearance — so the strong inference is that Jensen, Martinelli, both Wangs, and Singh are all Orrick personnel or Orrick-affiliated counsel. I could not verify that inference for Jensen, Martinelli, Xiang Wang, or Jonas Q. Wang before exhausting my research budget, and I am not asserting it as fact. Treat their firm/office and prior-case descriptions as unconfirmed; the safest citations for their credentials are the appearance itself (Dkt. 6) plus PACER's attorney-contact block.

Roles not present

  • No "local counsel" — not a concept at the Federal Circuit; no separate local-counsel designation exists.
  • No in-house counsel of record identified. No BOE/CSOT/Tianma/Visionox legal-department attorney appears on Dkt. 6. Chinese panel makers in this dispute have generally litigated through outside counsel (Orrick for BOE; other firms for Tianma/Visionox/CSOT), but I found no in-house appearance on the appellate docket.
  • No separate counsel for the individual appellants. Tianma, Visionox, and Wuhan China Star/CSOT are represented by the same seven attorneys as Mianyang BOE — there is no indication of separate appellate counsel for the non-BOE appellants on this docket.

For contrast: appellee's counsel (No. 25-1519)

  • Jeffrey Howard Lerner — appeared for Samsung Display (Dkt. 5, Notice of Related Case Information, Mar. 24, 2025), with Scott Weidenfeller and Matthew Aaron Kudzin of record. These three are the Samsung Display-side appellate team (commonly associated with Samsung's Federal Circuit practice). Their firms are not stated in the Justia listing and I could not verify them here — confirm on PACER.

Gaps and things to verify before relying on this

  1. Docket freshness. The public docket I could reach was last retrieved April 24, 2025. Only Dkts. 1–12 exist in that snapshot (no merits briefs, no oral-argument notice, no Rule 36). Additional appearances, substitutions, and any pro hac vice or withdrawal filings would post-date that snapshot. Pull PACER for No. 25-1517 (lead) and confirm whether Dkt. 6's list is still complete.
  2. Reported settlement. Chinese trade press (Sept. 2026) reports that BOE reached a settlement with Samsung Display in November 2025 ending all of their patent disputes, which would ordinarily produce a dismissal of these appeals. I could not corroborate this against the Federal Circuit docket or a Reuters/Law360 report, and the case metadata states the appeal is pending, so I am flagging it as an unverified report rather than a fact. If a dismissal issued, the appearances above remain the last counsel of record but the appeal would be closed. Confirm on PACER before any filing or citation.
  3. Sealed material. Nothing in Dkt. 1–12 appears sealed; the Entry of Appearance is public. There is no indication counsel has failed to appear.
  4. Four unverified names. Jensen, Martinelli, Xiang Wang, and Jonas Q. Wang need firm/office confirmation (PACER attorney contact block, or Orrick's site search). Do not repeat a firm attribution for them until checked.

Defendant representatives

Counsel of record for the defendant(s): attorneys, firms, and roles (lead counsel, of counsel, local counsel).

I'll research the Federal Circuit docket and related PTAB proceedings to identify Samsung Display's counsel.

Let me dig into the Federal Circuit docket and identify the firms for each appellee attorney.

Bottom line

Samsung Display Co., Ltd. ("SDC"), the appellee in No. 25-1519 (and cross‑appellant in the consolidated lead appeal No. 25‑1517), is represented on the Federal Circuit docket by a Covington & Burling LLP team. The four attorneys who have entered appearances in this consolidated appeal group are Jeffrey H. Lerner, Richard L. Rainey, Scott C. Weidenfeller, and Matthew A. Kudzin. Covington also held the PTAB-side defense of the ’578 patent in IPR2023‑01075 (led there by David A. Garr and Scott C. Weidenfeller). I found no in-house Samsung Display attorney and no separate "local counsel" (the Federal Circuit has none) on the docket.

Counsel of record for Samsung Display (appellee, No. 25‑1519)

Attorney Role Firm / office Experience note
Jeffrey H. Lerner Lead/appellate counsel of record — first-named on SDC's entries of appearance and the filer of SDC's Rule 26.1/related-case and docketing papers in 25‑1519 Covington & Burling LLP, One CityCenter, 850 Tenth St. NW, Washington, DC 20001 Long-time SDC Federal Circuit counsel; e.g., Solas OLED Ltd. v. Samsung Display Co., Fed. Cir. No. 22‑1185 (EoA for Samsung entities), and SDC's ITC appeal, Samsung Display Co. v. ITC, Fed. Cir. No. 25‑1791 (lead EoA filer). Also appeared for SDC in Samsung Display v. JOLED.
Richard L. Rainey Appellate/lead merits counsel (entered on the consolidated-appeal appearance in 25‑1517 and the parallel 25‑1426) Covington & Burling LLP, Washington, DC Registered patent attorney; 75+ Federal Circuit appeals; co-led Return Mail v. U.S. Postal Service, 139 S. Ct. 1853 (2019); Elbit Sys. v. Hughes Network Sys., 927 F.3d 1292 (Fed. Cir. 2019) (affirming $21M verdict); former GE Global Chief IP Litigator; clerked for Chief Judge Rader; Law360 IP MVP (2019).
Scott C. Weidenfeller Counsel — the bridge between the PTAB record and the appeal (named on SDC's service list in the underlying BOE IPRs and on the CAFC appearances) Covington & Burling LLP, Washington, DC Was SDC's PTAB counsel of record (with David A. Garr) in the IPR2023‑00941/‑01075 round, i.e., the trial-level advocate whose record is being defended on appeal; also on SDC's EoA in No. 25‑1426.
Matthew A. Kudzin Counsel (associate-level team member; listed on the consolidated entry of appearance and on the 25‑1519 docket's counsel list) Covington & Burling LLP (office not independently confirmed; firm's IP litigation group is DC-anchored) No independent public record of prior lead patent-appellate work found; do not treat as a merits lead.
David A. Garr PTAB-side lead counsel (not shown on the CAFC docket entries retrieved, but counsel of record for SDC below) Covington & Burling LLP, Washington, DC SDC's attorney of record in the BOE/Tianma/Visionox IPR round; relevant because the appeal is a substantial-evidence review of his PTAB record.

Docket support

  • No. 25‑1519, Dkt. 5 (Mar. 24, 2025) — "Notice of Related Case Information for Appellee Samsung Display Co., Ltd.," filed by Jeffrey Lerner; the docket's counsel listing for the case shows Lerner, Weidenfeller, and Kudzin. (Justia docket)
  • No. 25‑1517 (lead consolidated appeal), Mar. 24, 2025 — "Entry of Appearance for Jeffrey H. Lerner; Scott C. Weidenfeller; Richard L. Rainey; Matthew Kudzin as counsel for Cross‑Appellant Samsung Display Co., Ltd." [1077622]. Because 25‑1519 was consolidated into 25‑1517 on Mar. 27, 2025 (Dkt. 10–11) with all filings to be made in the lead appeal, this is the operative SDC appearance for the ’578 appeal. (CourtListener 25‑1517)
  • No. 25‑1426, Dkt. 9 (Feb. 20, 2025) — same three core names (Lerner, Weidenfeller, Rainey) for SDC as appellee in the companion appeal.
  • Underlying PTAB — In IPR2023‑00941 (the related ’599 IPR), petitioners served "attorneys of record for the Patent Owner": David A. Garr and Scott C. Weidenfeller, Covington & Burling LLP, One CityCenter, 850 Tenth Street NW, Washington, D.C. 20001, at SDC-BOE-IPR@cov.com. The same Covington team handled IPR2023‑01075 (the ’578 FWD of Jan. 6, 2025).
  • For contrast, appellants' counsel entered in 25‑1519 Dkt. 6 (Mar. 25, 2025) are Orrick attorneys Melanie L. Bostwick, Travis Jensen, Richard Martinelli, Bas de Blank, Xiang Wang, Jonas Q. Wang, and Harmann Singh.

Important caveats and open items

  1. Docket currency. The 25‑1519 docket I could retrieve was last pulled April 24, 2025; CourtListener shows continued activity in the lead appeal into October 2025 (entries [1108956], [1119727]). Additional or substituted appearances may exist after that date that I could not verify. Anything post–April 2025 is not confirmed here.
  2. No in-house counsel identified. I found no Samsung Display legal-department attorney on the CAFC docket; SDC appears to be relying entirely on outside counsel in this appeal.
  3. Different SDC counsel appear in the newer 2025 IPR round. In a Nov. 10, 2025 patent-owner preliminary response signed "Counsel for Patent Owner Samsung Display Co., Ltd.," the signature block is Charles H. Sanders, Latham & Watkins LLP (Boston) and Alex S. Yap, Mehran Arjomand, Jean Nguyen, Morrison & Foerster LLP (Los Angeles) — i.e., SDC's response to BOE's second wave of petitions (IPR2025‑01476 through ‑01545) appears to be handled by Latham/MoFo rather than Covington. Those firms do not appear on the 25‑1517/25‑1519 docket entries I retrieved, so I would not list them as appellate counsel of record without re‑pulling PACER.
  4. Oral argument. A Federal Circuit oral-argument recording discussing the ’578, ’683 and ’803 patents and defending the Board's ’578 findings exists in CourtListener's audio index, which suggests argument has been held. I could not confirm the date or which SDC attorney argued, so I am not attributing the argument.
  5. Case-status flag (unverified). Chinese-language industry reporting states BOE and Samsung Display reached a global settlement in November 2025, and the parallel E.D. Va. case, Samsung Display v. BOE Tech. Grp., No. 1:25‑cv‑00908 (E.D. Va.), was dismissed with prejudice by stipulation on Dec. 2, 2025. Your case metadata still lists 25‑1519 as pending, and the appeal also involves CSOT, Tianma and Visionox, so the SDC appellate team above may well remain active — but if you need current-of-record confirmation, the docket should be re-pulled directly.

Not sourced / not asserted: I did not find (and have not invented) any pro hac vice designations, any