QD Inkjet & Photolithographic Patterning Patent Snapshot
TCL Technology Group Corporation holds a commanding position in this niche field, accounting for the largest single share among a small set of Chinese display makers, Korean universities, and a handful of other research institutions. Annual filing volume has eased significantly from its 2019 peak, placing the field in a decline stage—though the most recent 24 months remain subject to publication lag.
TCL leads a highly concentrated, China-anchored field
TCL Technology Group Corporation ranks first with 6 patent families, ahead of BOE Technology Group (3 patent families) and Beijing BOE Technology Development (2 patent families). The top five filers together account for 67% of the ranked applicants visible in this query’ combined total, signaling an unusually tight visible assignee structure for a display-technology subfield.
A clear two-tier gap separates TCL from the rest: the next-closest applicants hold at most half TCL’s count. Below the top three, a cluster of academic institutions—Hongik University, Fuzhou University, Fujian Normal University, Yonsei University, and Hefei Institute of Physical Science—each contribute single patent families, confirming that university labs remain active but peripheral contributors.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | TCL Technology Group Corporation | 6 | |
| 2 | BOE Technology Group Co., Ltd. | 3 | |
| 3 | Beijing BOE Technology Development Co., Ltd. | 2 | |
| 4 | Hongik University Industry-Academic Cooperation Foundation | 2 | |
| 5 | Fuzhou University | 1 | |
| 6 | Samsung Display Co., Ltd. | 1 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 7 | Hefei Institute of Physical Science, Chinese Academy of Sciences | 1 | |
| 8 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | 1 | |
| 9 | Yonsei University Industry-Academic Cooperation Foundation | 1 | |
| 10 | Fujian Normal University | 1 | |
| 11 | Samsung Electronics Co., Ltd. | 1 | |
| 12 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | 1 |
TCL’s lead, supported by BOE’s parallel position and the presence of BOE’s development subsidiary, suggests that vertically integrated Chinese display manufacturers are the primary commercial drivers of this patterning approach. Samsung Display and Samsung Electronics each hold one patent family, indicating that the visible Korean display player is present but not prioritizing this route at scale.
The most recent 18–24 months of filing data are under-counted due to standard patent publication lag; any apparent quiet in 2025–2026 should not be read as a definitive absence of activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity peaked in 2019 and has since contracted; organic-semiconductor filings dominate the technology mix
The annual filing trend and the IPC branch breakdown together reveal both the temporal trajectory and the technical focus of the field.
Annual filing trend
Filings rose from 2 families in 2017 to a peak of 5 in 2019, then settled into modest single-digit years through 2021 before dropping to zero in 2022 and 2023. A small rebound appears in 2024 and 2025, though those years remain subject to publication lag and should not yet be read as a recovery trend. The lifecycle evidence confirms annual volume has eased from the 2019 peak.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H10K (Organic semiconductors / OLED-adjacent classes) accounts for the largest share of IPC records, reflecting the field’s tight coupling to electroluminescent display architectures. H01L (Semiconductor devices) and C09K (Materials for miscellaneous applications) form a secondary cluster, pointing to concurrent work on device structures and quantum-dot ink formulations. Nanotechnology applications (B82Y), printer/inkjet mechanics (B41J), metal-compound chemistry (C01G), and coatings/inks (C09D) each appear sparsely, marking adjacent branches that have attracted little dedicated filing to date.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Quantum dot display panel and manufacturing method…
A quantum dot display panel and a manufacturing method thereof are provided. The quantum dot display panel includes an array substrate; a luminescent layer disposed on the array substrate; an encapsulation layer disposed on the luminescent layer; and a color filter layer disposed on the encapsulation layer. The color filter layer includes a plurality of… (excerpt from the patent abstract)


| # | Patent | Citations |
|---|---|---|
| 1 | II-VI BASED NON-Cd QUANTUM DOTS, MANUFACTURING MET… | 22 |
| 2 | Display device and preparation method therefor | 3 |
| 3 | Alloy nanomaterial, preparation method therefor, a… | 2 |
| 4 | QLED and manufacturing method thereof | 1 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
TCL Technology Group Corporation
TCL holds 6 patent families, the largest position in the corpus. Their technical focus spans quantum-dot materials (C09K 11), semiconductor device structures (H01L 51), and organic-semiconductor display stacks (H10K 50)—a broad multi-layer coverage that reflects vertical integration across the ink-formulation-to-device stack. No recent momentum signal is recorded, consistent with the field’s overall decline phase.
families: 6BOE Technology Group Co., Ltd.
BOE holds 3 patent families and files jointly with its development subsidiary Beijing BOE Technology Development (2 additional families), giving the BOE corporate group a combined footprint of 5 patent families. BOE’s focus concentrates on organic-semiconductor display manufacturing (H10K 50 and H10K 71) and semiconductor device structures (H01L 51), with a narrower materials base than TCL. No new-entrant or accelerating momentum signal is recorded for BOE in recent periods.
families: 3Frequently asked questions
The corpus covers 18 patent families in scope. This is a niche subfield; the small corpus size means individual applicants and individual patents have an outsized influence on the overall landscape.
TCL Technology Group Corporation leads with 6 patent families. BOE Technology Group Co., Ltd. ranks second with 3 patent families, and Beijing BOE Technology Development ranks third with 2 patent families.
The field is classified as Decline. Annual filing volume has eased back from its 2019 peak of 5 families. The most recent 24 months remain subject to publication lag, so any apparent activity in 2024–2025 cannot yet be interpreted definitively.
The United States is the visible filing jurisdiction, followed by China. Europe (EPO) and South Korea each account for a single record. The US-heavy strategy is notable given that the visible assignees are headquartered in China and South Korea.
The only confirmed co-filing relationship is between BOE Technology Group and Beijing BOE Technology Development, with 2 jointly filed patent families. No other cross-institutional or cross-border co-filing pairs appear in the corpus.
The most-cited document in the corpus, with 22 citations, covers II-VI based non-cadmium quantum dots and their manufacturing methods. The next most-cited document covers display device preparation methods (3 citations), followed by alloy nanomaterials and their applications (2 citations), and a QLED manufacturing method (1 citation).
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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