Patent 7936415

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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PTAB activity (1)

AIA trial proceedings — IPR, PGR, CBM — filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced directly from the PTAB Trial API.

  • IPR2025-01537IPRfiled Sep 19, 2025vs. Hisense USA Corp. et al.Discretionary Denial

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Cases on file (5)

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Specific litigation cases in our database that name US patent 7936415. The free-form analysis below may also discuss cases beyond this list.

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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Litigation and Administrative Challenges Involving US Patent 7,936,415

US Patent 7,936,415, titled "Light source apparatus and liquid crystal display having the same," is at the center of multiple patent infringement lawsuits initiated by Light Guide Innovations LLC, a Texas-based entity. The patent, originally assigned to LG Innotek Co Ltd, is part of a larger portfolio of patents that Light Guide Innovations acquired and is now asserting against major electronics manufacturers. The litigation campaign began in 2024, with all identified district court cases filed in the U.S. District Court for the Eastern District of Texas, a popular venue for patent litigation.

In addition to district court litigation, the patent has also been subject to challenges at the Patent Trial and Appeal Board (PTAB).

Here is a detailed list of the known legal disputes involving US Patent 7,936,415:

District Court Litigation

1. Light Guide Innovations LLC v. TCT Mobile International Limited et al.

2. Light Guide Innovations LLC v. Hisense Company Ltd. et al.

3. Light Guide Innovations LLC v. Walmart Inc.

  • Plaintiff(s): Light Guide Innovations LLC
  • Defendant(s): Walmart Inc. The lawsuit was later amended to include various Hisense and TCL entities as defendants.
  • Jurisdiction: U.S. District Court for the Eastern District of Texas
  • Case Number: 2:25-cv-00312
  • Filing Date: March 21, 2025
  • Outcome or Current Status: This case is "Open" and ongoing. A claim construction hearing is scheduled for August 14, 2026, and a case management conference is set for January 12, 2027. The first amended complaint in this case explicitly lists U.S. Patent No. 7,936,415 as one of the asserted patents.

4. Light Guide Innovations LLC v. Samsung Electronics Co. Ltd. et al.

  • Plaintiff(s): Light Guide Innovations LLC
  • Defendant(s): Samsung Electronics Co. Ltd. and [Samsung Electronics America Inc.](/litigations/by-plaintiff/Samsung%20Electronics%20America%20Inc.)
  • Jurisdiction: U.S. District Court for the Eastern District of Texas
  • Case Number: 2:25-cv-01093
  • Filing Date: October 31, 2025
  • Outcome or Current Status: The case is currently "Open." The complaint accuses Samsung's televisions and displays, including their LED, Crystal UHD, QLED, and neo QLED product lines, of infringing on a portfolio of patents that includes the '415 patent.

Patent Trial and Appeal Board (PTAB) Proceedings

1. Hisense USA Corp. v. Light Guide Innovations LLC

  • Petitioner: Hisense USA Corp.
  • Patent Owner: Light Guide Innovations LLC
  • Proceeding Number: IPR2025-01537
  • Filing Date: September 19, 2025
  • Outcome or Current Status: The PTAB has decided not to institute an Inter Partes Review (IPR) for this patent. The status is listed as "Not Instituted - Procedural" as of January 16, 2026.

It is worth noting that a request for ex parte reexamination of US Patent 7,936,415 was also filed on December 11, 2025, by Unified Patents, LLC.

Generated 5/13/2026, 6:48:48 PM