Litigation

Bishop Display Tech LLC v. TCL Electronics Holdings Ltd. et al.

Ongoing

2:26-cv-00257

Filed
2026-03-27

Patents at issue (1)

8093830PTAB: discretionary denial

Summary

Bishop Display Tech LLC filed a patent infringement suit against TCL Electronics Holdings Ltd. and several affiliated entities.

Case overview & background

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

Bishop Display Tech LLC, a patent assertion entity (PAE) managed by the principals of Texas monetization firm IP Edge LLC, has filed a patent infringement lawsuit against TCL Electronics Holdings Ltd. and numerous affiliated entities. The defendants, including TCL Electronics Holdings Ltd., China Display Optoelectronics Technology (Huizhou) Co., Ltd., and TCL Technology Group Corp., are a Chinese multinational conglomerate specializing in the research, development, manufacturing, and distribution of a wide range of consumer electronics, such as televisions, mobile phones, and smart display products. The suit alleges infringement of U.S. Patent 8,093,830. This patent describes a semiconductor light source driving apparatus and method, encompassing components like a semiconductor light source (e.g., LED or laser diode), a power supply, an output voltage controlling section, and an output current detecting section, with the method involving current measurement, comparison to a desired value, impedance measurement, and voltage adjustment. Based on Bishop Display Tech's litigation history, the accused products are likely TCL's display technologies, such as thin-film-transistor liquid-crystal displays (TFT-LCDs), liquid crystal modules (LCMs), or products incorporating these displays like televisions and smartphones.

The case was filed on March 27, 2026, in the U.S. District Court for the Eastern District of Texas. The Eastern District of Texas remains a notable venue for patent litigation due to its historically plaintiff-friendly reputation, expedited trial schedules, and a jury pool often perceived as favorable to patent owners. Despite the Supreme Court's 2017 TC Heartland decision, which restricted patent venue for domestic defendants, plaintiffs like Bishop Display Tech have continued to file in EDTX by targeting foreign entities that may be subject to personal jurisdiction there, thereby circumventing the more restrictive venue requirements. Many of the named TCL defendant entities are foreign corporations, making this strategy applicable. A specific presiding judge for this newly filed case was not readily identifiable through public web searches.

This litigation is notable for several reasons. Bishop Display Tech LLC is a well-known entity associated with IP Edge LLC, a prolific patent monetization firm that consistently asserts patents in the Eastern District of Texas, often against major electronics manufacturers. The patents asserted by Bishop Display Tech were originally acquired from IP Bridge, Inc., with underlying origins from Panasonic and Seiko Epson. The targeting of TCL, a significant global player in the consumer electronics market, highlights the ongoing impact of NPE assertions on the industry's leading companies. While no Inter Partes Reviews (IPRs) have been initiated specifically against Patent 8,093,830 in connection with this particular lawsuit yet, defendants in cases involving IP Edge entities frequently challenge asserted patents at the Patent Trial and Appeal Board (PTAB), as seen in other Bishop Display Tech cases. Therefore, it is highly probable that similar PTAB challenges will follow in this dispute.

Key legal developments & outcome

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

The patent infringement litigation, Bishop Display Tech LLC v. TCL Electronics Holdings Ltd. et al. (2:26-cv-00257) in the U.S. District Court for the Eastern District of Texas, was filed on March 27, 2026. Given the recent filing date, substantive legal developments beyond the initial complaint are not yet publicly available. The case involves U.S. Patent No. 8,093,830.

Here's a chronological overview of the key legal developments and the current posture:

  • Filing & Initial Pleadings:

    • Complaint Filed (2026-03-27): Bishop Display Tech LLC initiated the lawsuit by filing a patent infringement complaint against TCL Electronics Holdings Ltd. and several affiliated entities in the Eastern District of Texas. Details regarding the defendants' answers or any counterclaims are not yet publicly available due to the early stage of the litigation.

  • Pre-trial motions of substance:

    • As of May 23, 2026, no substantive pre-trial motions, such as motions to dismiss, transfer, or stay, have been publicly reported for this specific case.

  • Claim construction (Markman) outcomes:

    • This stage has not yet been reached in the litigation.

  • Discovery milestones with strategic significance:

    • Significant discovery milestones have not yet occurred due to the early stage of the litigation.

  • Trial events, verdict, and post-trial motions:

    • These stages have not been reached, as the case is in its very initial phases.

  • Settlement, dismissal, judgment, or appeal:

    • The case is currently ongoing, and no final disposition, such as settlement, dismissal, or judgment, has been recorded.

  • Parallel PTAB IPR/PGR proceedings on the asserted patents:

    • U.S. Patent No. 8,093,830, the patent at issue in this litigation, has been the subject of at least two inter partes review (IPR) proceedings before the Patent Trial and Appeal Board (PTAB):
      • IPR2022-00503: Unified Patents LLC filed an IPR against Bishop Display Tech LLC concerning this patent on January 31, 2022. This IPR was subsequently terminated due to settlement.
      • IPR2025-01331: [BOE Technology Group Co., Ltd.](/litigations/by-plaintiff/BOE%20Technology%20Group%20Co.%2C%20Ltd.) also filed an IPR against Bishop Display Tech LLC regarding Patent No. 8,093,830. The status of this IPR is ongoing.
    • While these PTAB proceedings could potentially impact the district court litigation (e.g., through a stay or by invalidating claims), the current case is too recent for any direct effect of these IPRs on its progression to be apparent.

In the news

What the press has reported about this case, summarized with links to the source articles.

I'll search multiple angles to find press coverage of this case.

Let me search additional angles for English-language coverage.

Let me check for English-language legal trade coverage and any recent developments.

Press and trade coverage

My searches turned up no English-language mainstream or legal-trade coverage of Bishop Display Tech LLC v. TCL Electronics Holdings Ltd. No Reuters, Bloomberg Law, Law360, IPWatchdog, Patently-O, Ars Technica, or The Verge article discussing this docket surfaced. The only reporting is Chinese-language display-industry trade press and a government-affiliated IP alert, plus database entries (RPX Empower, Ex Parte) that are docket aggregations rather than journalism.

The most substantive account is from CINNO Research, published 2026-03-31 and syndicated across EET-China, Sohu and NetEase (163.com). CINNO reported on 2026-03-31 that Bishop Display — an IP Edge LLC litigation vehicle it says was formed in Texas in October 2020 specifically to run LCD patent suits — filed two related complaints in the Eastern District of Texas on March 27, 2026, naming 11 TCL-affiliated entities spanning the full chain from end-products (TCL Electronics, TCL Communications) to panel makers (CSOT, Wuhan China Star, Huizhou) to group holding companies (TCL Industries, TCL Technology Group). It reported the two cases collectively assert 10 U.S. patents split 6-and-4: one case on "hardware core" patents (TFT-LCD panel structure, electrode design, manufacturing) and the other on "drive core" patents (display driving, backlight control, current/voltage control circuits). Accused products, per CINNO, include TFT-LCD panels and LCM modules plus downstream TVs, phones and tablets — and, notably, third-party products using CSOT panels, such as Lenovo notebooks and ViewSonic monitors. CINNO said Bishop Display pleads direct and induced infringement plus willfulness, seeking treble damages, a reasonable royalty and attorneys' fees, and asks that the entire TCL group be held jointly liable on an "alter ego/agency" theory. CINNO framed the filing as part of a deliberate "sue–pressure–settle–dismiss" playbook, noting Bishop Display had previously sued Samsung, LG and Innolux, and that its two March 2025 suits against BOE ended in settlement — plaintiff moving for settlement and stay in January 2026, approved by the court in February 2026 without any merits trial.

The Shenzhen IP Protection Center (a government-affiliated body) issued a "risk warning" about Bishop Display that was published by IPRdaily on 2026-04-08 (the warning itself dated 2026-04-02, also carried by 10100.com). It confirmed the two March 27 filings (2:26-cv-00256 and 2:26-cv-00257), stated both were at the service-of-process stage, and reported 10 asserted U.S. patents covering TFT-LCD array-substrate structure, pixel-circuit design and backlight-module control, with accused products spanning TVs, monitors and automotive displays. It characterized Bishop Display as an IP Edge entity holding 53 U.S. patents that has filed more than 12 patent suits since 2020, roughly 90% in EDTX, targeting Asian panel makers and their downstream customers, with most cases settling within about a year. Its advice to Chinese display companies was to staff a U.S. defense team, weigh a jurisdictional challenge, and pursue efficient settlement.

Separately, an OFweek Display industry analysis dated 2026-04-20 cited the March 2026 Bishop Display actions against the 11 TCL entities over 10 LCD patents as evidence of a broader escalation in display-industry patent warfare. Database-only entries — an RPX Empower docket page confirming the 03/27/2026 filing, and automated Ex Parte complaint analyses of 2:26-cv-00257 — corroborate the filing but add no independent reporting. One related but distinct story, EET-China/WitDisplay (2026-02-08), covers a different NPE (BH Innovations LLC) suing LG, Hisense, TCL and HKC in the Eastern District of Virginia; I mention it only to flag that it is not coverage of this case.

Discrepancies to flag: (1) The case metadata lists only U.S. Patent 8,093,830 as at issue, but the trade coverage says the two TCL suits assert 10 patents collectively, and the Ex Parte docket page for 2:26-cv-00257 lists '347, '682, '047 and '830 (plus two more) — so the single-patent metadata appears underinclusive. (2) CINNO's "6-and-4" per-case split does not map cleanly onto the Ex Parte listing for 2:26-cv-00257, and the IPRdaily/10100 reports do not break the 10 patents down by case, so which patents sit in which docket is not settled by the press. (3) The Chinese-language accounts are trade-press and government-advisory pieces, not independent journalism, and their characterization of Bishop Display as a "malicious NPE" is editorial; the litigation-strategy details (e.g., the BOE settlement timeline) are reported only by CINNO and were not independently verified in an English-language source. No damages figure, settlement amount, or verdict has been reported — consistent with the case being at the service-of-process stage as of the latest coverage I found.

Sources

Plaintiff representatives

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

Here is the identified counsel of record representing Bishop Display Tech LLC in Bishop Display Tech LLC v. TCL Electronics Holdings Ltd. et al.:

  • Elizabeth L. DeRieux

    • Role: Local Counsel
    • Firm: Capshaw DeRieux, LLP, Longview, Texas.
    • Note: Ms. DeRieux has a broad federal practice that includes intellectual property and commercial litigation, with a focus on appellate law and preservation of error in federal and state courts.

  • D. Patrick Ryan

    • Role: Lead Counsel (Likely)
    • Firm: Nelson Bumgardner Conroy PC, Fort Worth, Texas.
    • Note: While a specific "D. Patrick Ryan" was not explicitly detailed in the provided search results beyond his listing in PacerMonitor, Patrick M. Ryan (a common variation) is Co-Managing Partner and Chair of Litigation Practice at Bartko LLP with extensive experience in high-stakes litigation, including intellectual property disputes. Another Patrick Ryan at Fish & Richardson also focuses on patent infringement litigation across various technologies in U.S. District Courts and the ITC. Without a direct firm website or docket entry, his specific relevant experience and office location within Nelson Bumgardner Conroy PC remain to be definitively sourced.

  • Michael C. Smith

    • Role: Local Counsel
    • Firm: Scheef & Stone, LLP, Marshall, Texas.
    • Note: Mr. Smith is a partner whose practice focuses on complex commercial and patent litigation in federal court, particularly in the Eastern District of Texas. He has appeared as counsel of record in over 900 civil cases in the Eastern District of Texas and served as chairman of the Eastern District's Local Rules Advisory Committee. He also maintains a weblog tracking Eastern District news and caselaw.

  • James R. Wooley

    • Role: Lead Counsel (Likely)
    • Firm: Nelson Bumgardner Conroy PC (firm inferred from PacerMonitor listing)
    • Note: The provided search results for "James R. Wooley" indicate a trial practice lawyer in Cleveland, Ohio, primarily focused on white-collar crime and business litigation at Jones Day. There is no information in the immediate search results to connect this specific James R. Wooley with patent litigation or the Eastern District of Texas for Bishop Display Tech LLC. There is also a Patrick C. Woolley mentioned as a practice group chair for Science and Technology with extensive patent, trademark, copyright, and trade secret litigation experience, including managing IP portfolios for Fortune 500 companies. However, without a clear match to "James R. Wooley" from Nelson Bumgardner Conroy PC on the docket for this case, his specific relevant patent litigation experience for this plaintiff is not confirmed.

  • Jonathan Hart Rastegar

    • Role: Counsel
    • Firm: Nelson Bumgardner Conroy PC - Dallas.
    • Note: Specific patent litigation experience not detailed in provided search snippets.

  • Patrick Joseph Conroy

    • Role: Counsel
    • Firm: Nelson Bumgardner Conroy PC.
    • Note: Specific patent litigation experience not detailed in provided search snippets.

  • Thomas William Kennedy, Jr.

    • Role: Counsel
    • Firm: Nelson Bumgardner Conroy PC - Dallas.
    • Note: Specific patent litigation experience not detailed in provided search snippets.

  • John Paul Murphy

    • Role: Counsel
    • Firm: Nelson Bumgardner Conroy PC - Fort Worth.
    • Note: Specific patent litigation experience not detailed in provided search snippets.

  • Justin Bryce Kimble

    • Role: Counsel
    • Firm: Nelson Bumgardner Conroy PC - Dallas.
    • Note: Specific patent litigation experience not detailed in provided search snippets.

The roles (e.g., lead counsel, of counsel) for the Nelson Bumgardner Conroy PC attorneys are inferred based on common practice in patent litigation and the listing on PacerMonitor. Definitive roles would typically be detailed in a formal appearance or scheduling order from the court.

Defendant representatives

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

As of May 23, 2026, the counsel of record representing the defendant(s) in Bishop Display Tech LLC v. TCL Electronics Holdings Ltd. et al. (2:26-cv-00257) cannot be definitively identified through public web searches. The official court docket, typically accessed via PACER, would be necessary to determine which attorneys have formally entered an appearance for the various defendant entities.

Publicly available docket aggregators confirm the case filing on March 27, 2026, and list plaintiff's counsel, including Patrick Joseph Conroy and Jonathan Hart Rastegar of Nelson Bumgardner Conroy PC. However, details for defense counsel are not readily accessible in the provided search results.

In previous patent litigation cases involving TCL Electronics Holdings Ltd. and its affiliates in the Eastern District of Texas and other forums, various firms have represented the defendants. These may indicate potential defense counsel, but their appearance in this specific case is unconfirmed:

  • Perkins Coie represented TCL in an International Trade Commission (ITC) patent infringement case. Attorneys included John P. Schnurer, Kevin Patariu, Yun Louise Lu, Vinay Sathe, Kyle Canavera, Hayden Householder, and James Coughlan.
  • McDermott Will & Emery LLP and Mayer Brown LLP represented TCL Electronics Holdings Ltd. in an Inter Partes Review (IPR) proceeding before the Patent Trial and Appeal Board (PTAB).
  • Ropes & Gray and Haltom & Doan have represented TCL in other Eastern District of Texas patent cases (e.g., Canon, Inc. v. TCL Electronics Holdings Ltd.).

Without direct access to the docket for case 2:26-cv-00257, the specific attorneys, their roles, and firms for the defendants remain unconfirmed.