QD Color Conversion Film Patent Snapshot 2026
The QD color conversion film corpus is a small, highly concentrated field with LG Display and TCL China Star Optoelectronics tied at the top, together anchoring the majority of activity. Annual volume peaked in 2018 and 2021 and has since eased back, signaling a mature or declining filing environment rather than one still expanding.
LG Display and TCL China Star Optoelectronics lead a tightly held, small corpus
LG Display Co Ltd and TCL China Star Optoelectronics Technology Co Ltd each hold two patent records, placing them jointly at the top of the ranking. The top five filers together account for 88% of the combined total of the ranked applicants visible in this query, indicating extreme concentration for a field this size.
The tier gap between the joint leaders and the remaining applicants — Dell Products, Shenzhen Planck Innovation Tech, Wuhan. China Star Optoelectronics, and Shenzhen. China Star Optoelectronics — is immediate: each holds one patent record, with no meaningful mid-tier cluster.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | LG Display Co Ltd | 2 | |
| 2 | TCL China Star Optoelectronics Technology Co Ltd | 2 | |
| 3 | Dell Products LP | 1 | |
| 4 | Shenzhen Planck Innovation Tech Co Ltd | 1 | |
| 5 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd | 1 | |
| 6 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd | 1 |
The leaders’ positions suggest that meaningful defensive or licensing positions in this specific film format are held by a very small set of display panel manufacturers, with limited participation from material suppliers or independent component makers.
Activity from the most recent years should be treated as under-counted due to standard patent publication lag; any apparent absence of filings after 2022 does not confirm a complete halt in activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing activity peaked around 2018 and 2021; semiconductor device classes dominate the technology mix
The annual trend reveals a sparse, episodic filing pattern, while the technology composition chart shows semiconductor and optical classes as the primary branches, with lighting-specific classes contributing marginally.
Annual filing trend
Filings first appeared in 2018, dropped to zero in 2019, recovered modestly in 2020–2021, then fell again. The most recent years show no recorded activity, though publication lag means 2024–2026 data remains incomplete and should not be read as confirmed inactivity.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01L (semiconductor devices) leads the technology mix, closely followed by G02B (optical elements and systems), H10K (organic semiconductors including OLED), C09K (materials for miscellaneous applications), and G02F (optical control and modulation). Lighting-specific branches F21K, F21V, and F21Y each contribute a single record, marking them as the thinnest areas of coverage.
↗ 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)
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.
LG Display Co Ltd
LG Display holds 2 patent records, concentrated in C09K 11 (quantum dot materials), H01L 33 (LED semiconductor devices), and H10D 62 (semiconductor devices general). This materials-plus-LED-chip emphasis positions LG Display at the component and phosphor layer of the conversion film stack. No momentum trend data is available for this applicant in the evidence.
patent records: 2TCL China Star Optoelectronics Technology Co Ltd
TCL China Star also holds 2 patent records, with technical focus on G02B 5 (optical elements), G02F 1 (optical control and modulation), and H01L 27 (integrated semiconductor devices). This emphasis on optical control and panel-level integration contrasts with LG Display’s materials orientation, indicating a system-level rather than material-level approach to color conversion.
patent records: 2Frequently asked questions
The corpus in scope contains 6 patent families. This is a small dataset, and all quantitative observations should be interpreted in that context.
LG Display Co Ltd and TCL China Star Optoelectronics Technology Co Ltd are jointly ranked first, each holding 2 patent records. Dell Products LP, Shenzhen Planck Innovation Tech Co Ltd, Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd, and Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd each hold 1 patent record.
The field is classified as Decline. Annual filings peaked around 2018 and have eased back since, with no sustained recovery observed in the available data. The most recent years remain subject to publication lag.
The United States leads with 5 patent records, followed by the United Kingdom with 2 and WIPO PCT with 1. Major display-manufacturing jurisdictions such as China, Japan, South Korea, and Europe are not represented in this corpus.
H01L (semiconductor devices) appears most frequently, followed by G02B (optical elements and systems), H10K (organic semiconductors including OLED), C09K (materials for miscellaneous applications), and G02F (optical control and modulation). Lighting-specific branches F21K, F21V, and F21Y each contribute one record.
Dell Products LP is identified as a new entrant with one recent patent record, representing a shift from a system integrator rather than a display panel manufacturer. No co-filing or collaboration relationships are present in the corpus.
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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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