Plaintiff
1 case as plaintiff.
Tianma Microelectronics Co., Ltd. (天马微电子股份有限公司; short name "Tianma," listed in Shenzhen as 深天马A / 000050) is a Chinese display manufacturer headquartered in Shenzhen's Longhua District. Founded in 1983 and listed on the Shenzhen Stock Exchange since March 1995, it is state-controlled: majority ownership runs through AVIC International and CATIC Shenzhen entities, with ultimate control by the Aviation Industry Corporation of China (AVIC) and, ultimately, China's SASAC. PitchBook lists roughly 23,500 employees and trailing-12-month revenue of about US$5.1 billion; company recruitment materials cite ~RMB 36.2 billion (2025) and over 40,000 employees including associates. Market capitalization has recently been around CNY 15–19 billion. These figures vary by source and date.
Products/operations: Tianma is an operating display-panel maker focused on small- and medium-sized panels. Its lines include LTPS TFT-LCD and rigid/flexible AMOLED; automotive displays (instrument clusters, head-up displays, center information displays, smart cockpit, rear-seat entertainment); professional and industrial displays (medical, industrial handheld, HMI, appliances); IT displays (tablet, notebook, monitor); mobile/wearable displays; and emerging micro-LED, transparent and touch-integrated displays. Company disclosures say it has ranked first globally in automotive-grade display shipments for six consecutive years.
Litigation posture: Tianma is an operating company, not an NPE. The single tracked case shows it as petitioner (plaintiff side) with zero defendant cases: a joint PTAB filing against Samsung Display. Tianma's patent activity reflects defensive and counter-assertion strategy in a display-industry patent war rather than portfolio monetization.
Notable case/context: BOE et al. v. Samsung Display Co., Ltd. (2023-07-27) is a joint inter partes review petition by Mianyang BOE, Wuhan China Star (TCL CSOT), Tianma and Visionox challenging Samsung Display's OLED patents — including U.S. 9,330,593 (IPR2024-00620) and 7,414,599 (IPR2023-00941). The challenges respond to Samsung Display's December 2022 ITC complaint (337-TA-1351) and its Eastern District of Texas suit against BOE. Tianma has also previously petitioned against Japan Display/Panasonic LCD patents and is itself named in PTAB proceedings over its own display patents.
Watchlist
Email-only, free, anonymous. We'll notify you when Tianma files another patent-infringement lawsuit. One-click unsubscribe from any alert.
Joint IPR petition by BOE, CSOT, Tianma, and Visionox against Samsung Display's US 9,330,593. BOE filed to terminate before institution, Samsung Display did not oppose, and the proceeding was recorded as a procedural termination.