OLED Efficiency (EQE/Outcoupling) Patent Landscape
The OLED efficiency (EQE/outcoupling) space is highly concentrated, with Korean display and materials incumbents holding dominant positions and the top five filers accounting for half of the leading hundred applicants’ combined output. The field is still expanding on a multi-year basis—recent three-year filings more than doubled the prior window—though annual volume has eased from its 2023 peak and the most recent filing years remain understated by publication lag.
Samsung Display leads a Korean-dominated, highly concentrated field
Samsung Display Co. Ltd. holds the top position with 202 patent families, followed by LG Display Co. Ltd. with 147 and Samsung Electronics Co. Ltd. with 126. Universal Display Corporation ranks fourth at 112 patent families, making it the leading non-Korean incumbent. Canon K. K. rounds out the top five at 53 patent families.
The top five filers account for 50% of the hundred largest filers’ combined output, signaling a pronounced tier gap. The distance between the fourth-ranked Universal Display (112 families) and the fifth-ranked Canon (53 families) is already substantial, and the gap widens further into the mid-tier, where LG Chem, SFC, and Merck each hold 37–52 patent families.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Samsung Display Co. Ltd. | 202 | |
| 2 | LG Display Co. Ltd. | 147 | |
| 3 | Samsung Electronics Co. Ltd. | 126 | |
| 4 | Universal Display Corporation | 112 | |
| 5 | Canon Inc. | 53 | |
| 6 | LG Chem Ltd. | 52 | |
| 7 | SFC Co. Ltd. | 37 | |
| 8 | Merck Patent GmbH | 37 | |
| 9 | Novaled GmbH | 33 | |
| 10 | Beijing Summer Sprout Technology Co. Ltd. | 27 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Kyulux Inc. | 22 | |
| 12 | The University of Hong Kong | 20 | |
| 13 | Global OLED Technology LLC | 18 | |
| 14 | Hong Kong Quantum AI Lab Ltd. | 17 | |
| 15 | LT Materials Co. Ltd. | 16 | |
| 16 | BOE Technology Group Co. Ltd. | 15 | |
| 17 | The Regents of the University of Michigan | 15 | |
| 18 | Samsung SDI Co. Ltd. | 14 | |
| 19 | Shijiazhuang Chengzhi Yonghua Display Materials Co. Ltd. | 13 | |
| 20 | Raynergy Tek Inc. | 13 |
Samsung Display’s and LG Display’s scale implies broad freedom-to-operate constraints for any entrant targeting core emitter and device-stack architectures. Universal Display’s 112-family position—backed by a sharp recent upswing—suggests the phosphorescent and TADF materials layer is becoming a second center of competitive gravity alongside panel-level device engineering.
Filing counts for 2024–2026 are understated due to typical 18–24 month publication lag; competitive positions for those years will become clearer as applications publish. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filings more than doubled on a three-year basis; organic semiconductor IP dominates the technology mix
Two structural features define this space: a strong multi-year growth trajectory anchored by a 2023 filing surge, and a technology composition overwhelmingly weighted toward organic semiconductor device and materials classes.
Annual filing trend
Filings grew steadily from 23 in 2017 to a pronounced peak of 318 in 2023, representing the highest single-year volume on record. The 2024 figure of 165 and the 2025 figure of 138 reflect publication lag rather than a confirmed structural decline; the three-year recent window still sits roughly twice the prior three-year window. The 2026 count of 7 is a near-real-time partial figure and should not be interpreted as a trend data point.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H10K (Organic semiconductors / OLED devices) is the dominant branch by a wide margin, reflecting the device-level focus of most applicants. C09K (luminescent materials) and C07F (organometallic compounds) form the second tier, indicating substantial co-activity in emitter chemistry. C07D (heterocyclic compounds) and H01L (semiconductor devices) are the next meaningful branches, pointing to heterocyclic ligand chemistry and conventional semiconductor integration as adjacent technical threads.
↗ 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.
Dinuclear platinum (II) red emitters for OLED appl…
Platinum (II) complexes (“Pt(II) complexes”) that can emit in the red and/or deep red regions and methods of making and using thereof are described. These Pt(II) complexes can have dinuclearity with close Pt—Pt contact and close interplanar distance, allowing for high emission quantum yield, such as >50%, short emission lifetime, such as <3 μs, and high… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Top-emittierendes, elektrolumineszierendes Bauelem… | 14 |
| 2 | Electronic device | 12 |
| 3 | 一种多环化合物及包含其的有机电致发光器件 | 11 |
| 4 | Heterocyclic compound and organic light-emitting d… | 8 |
| 5 | Organometallic compound, organic light emitting de… | 8 |
| 6 | 含有萘苯并呋喃结构的有机化合物及包含其的有机电致发光器件 | 8 |
| 7 | 一种蓝色发光组合物及包含其的有机电致发光器件 | 7 |
| 8 | 一种用于有机电致发光器件的双硼多环化合物 | 6 |
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.
What the competitive structure means for R&D positioning
The combination of high concentration, a Growth lifecycle stage, active panel-maker/material-supplier collaboration, and US-centric filing geography shapes where new entrants and mid-tier players can most effectively deploy R&D resources.
Growth stage, past its 2023 volume peak
The field sits in a Growth lifecycle stage: recent three-year filings are roughly double the prior three-year window, confirming multi-year expansion. Annual volume peaked in 2023 at 318 families and has eased since, though 2024–2025 figures are further suppressed by publication lag. This combination—still-rising multi-year trajectory with a post-peak annual pattern—is typical of a maturing growth field where core architectural patents are consolidating while materials innovation continues to accelerate.
Growth · post-2023 peakTop five hold half of the leading hundred filers’ output
The top five applicants—Samsung Display, LG Display, Samsung Electronics, Universal Display, and Canon—account for 50% of the hundred largest filers’ combined patent families. This level of concentration creates meaningful freedom-to-operate risk for mid-tier entrants in core device-stack and emitter claims. However, the mid-tier (LG Chem, SFC, Merck, Novaled, Beijing Summer Sprout) remains active, and several universities and smaller materials firms appear in the top 20, suggesting that novel emitter chemistry and specific outcoupling structures are not yet fully locked up by incumbents.
High concentrationPanel makers co-file with material suppliers and Korean universities
Samsung Electronics co-files most actively with Samsung SDI (14 joint families), while LG Display’s busiest partnerships are with Rohm and Haas Electronic Materials Korea (12 families) and LT Materials (10 families). LG Display also collaborates with Korea University (5 families) and DuPont Specialty Materials Korea (4 families). Samsung Electronics has smaller but notable co-filing relationships with KAIST, Ewha Womans University, Sungkyunkwan University, and Seoul National University R&DB Foundation. These pairings reveal a supply-chain-integrated innovation model where panel makers anchor materials and academic partnerships.
Supply-chain co-filingUS is the primary protection jurisdiction; Europe and China follow
The United States leads with 680 patent records, more than three times Europe (EPO, 213) and China (185). Germany (93) and WIPO/PCT (37) follow. South Korea (17) and Japan (16) are notably low given the Korean and Japanese nationality of several leading applicants, which may reflect a strategy of filing protection primarily in end-market jurisdictions rather than home offices. Canada (6), the United Kingdom (6), and India (3) represent early-stage coverage and potential gaps.
US-centric filingGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Samsung Electronics Co. Ltd. | Samsung SDI Co. Ltd. | 14 |
| LG Display Co. Ltd. | Rohm and Haas Electronic Materials Korea Co. Ltd. | 12 |
| LG Display Co. Ltd. | LT Materials Co. Ltd. | 10 |
| LG Display Co. Ltd. | Korea University Research and Business Foundation | 5 |
| LG Display Co. Ltd. | DuPont Specialty Materials Korea Co. Ltd. | 4 |
| Samsung Electronics Co. Ltd. | Korea Advanced Institute of Science and Technology (KAIST) | 2 |
| Samsung Electronics Co. Ltd. | 梨花女子大学校产学协力团 | 2 |
| Samsung Electronics Co. Ltd. | 成均馆大学校产学协力团 | 2 |
| Samsung Electronics Co. Ltd. | Seoul National University R&DB Foundation | 2 |
| LG Display Co. Ltd. | LG Chem Ltd. | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Samsung Display and LG Display lead by volume; Universal Display accelerates on emitter chemistry
The top tier divides into panel-level device integrators (Samsung Display, LG Display, Samsung Electronics) and pure-play materials specialists (Universal Display, LG Chem, Merck). Both sub-groups concentrate on H10K organic semiconductor classes but differ in their materials chemistry depth.
Samsung Display Co. Ltd.
Samsung Display holds 202 patent families, the largest position in the corpus, focused on H10K OLED device architecture and organometallic emitter compounds (C07F). Despite a recent momentum reading of –38% versus the prior three-year window, the absolute recent volume of 18 families still reflects a meaningful active portfolio. The parent group’s broader OLED efficiency effort is amplified by Samsung Electronics (126 families, +38% momentum) and Samsung SDI (14 families), which together extend the Samsung ecosystem’s reach into emitter chemistry and luminescent materials.
families: 202Universal Display Corporation
Universal Display ranks fourth overall with 112 patent families and shows the steepest momentum trajectory among established filers at 4.9× versus the prior three-year period. Its technology focus is centered on H10K device and emitter classes alongside C09K luminescent materials, consistent with its phosphorescent emitter licensing model. This sharp recent acceleration positions Universal Display as the fastest-growing major incumbent and a key reference point for any entrant seeking freedom-to-operate in high-efficiency phosphorescent or TADF emitter architectures.
families: 112| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Samsung Electronics Co. Ltd. | 126 | ▲ +38% |
| LG Display Co. Ltd. | 105 | ▲ +184% |
| Universal Display Corporation | 64 | ▲ 4.9× vs prior 3-yr |
| Samsung Display Co. Ltd. | 18 | ▼ -38% |
| Canon Inc. | 29 | ▲ +142% |
| LG Chem Ltd. | 31 | ▲ +55% |
| Merck Patent GmbH | 7 | ▲ new entrant |
| SFC Co. Ltd. | 20 | ▲ +54% |
Under-served branches adjacent to the dominant OLED device core
Several IPC branches co-occur with the dominant H10K class at relatively low filing density, suggesting areas where coverage is thin relative to their technical relevance to EQE and outcoupling improvement.
H01L · Semiconductor device integration
H01L appears in 98 patent records—just 3% of the IPC branch distribution—despite being directly relevant to hybrid organic-inorganic device architectures and thin-film transistor backplanes that affect outcoupling geometry. The sparse coverage could reflect that most applicants treat this as background art rather than a primary claim target. Entrants with competence in silicon or oxide TFT integration may find room to build differentiated positions here, particularly as micro-OLED and AR display form factors demand tighter coupling between drive circuitry and emitter stack design.
Search this in Eureka →G02B · Optical elements and outcoupling structures
G02B (optical elements and systems) appears in only 7 patent records across this corpus, making it one of the sparsest branches despite its direct relevance to photon extraction via microlens arrays, light-guide structures, and nanostructured outcoupling layers. Physical light-extraction techniques—distinct from emitter chemistry—represent a plausible technical entry path for optics-focused players or photonics firms not currently competing in organic emitter chemistry. The low count warrants verification of scope, but the observation stands that device-level optical engineering is an under-represented angle in this EQE/outcoupling corpus.
Search this in Eureka →How leading applicants differ by technology route
Route coverage across the main technology branches in the current evidence set.
| Player | H10K 50 · Organic semiconductors (OLED etc.) | H10K 85 · Organic semiconductors (OLED etc.) | C09K 11 · Materials for misc. applications | H10K 101 · Organic semiconductors (OLED etc.) | C07F 15 · Organo-metallic & non-carbon compounds |
|---|---|---|---|---|---|
| Samsung Electronics Co. Ltd. | Strong · 202 | Strong · 235 | Strong · 173 | Moderate · 92 | Strong · 175 |
| LG Display Co. Ltd. | Strong · 121 | Strong · 134 | Strong · 72 | Moderate · 42 | Moderate · 40 |
| Universal Display Corporation | Strong · 92 | Strong · 67 | Moderate · 40 | Moderate · 32 | Moderate · 25 |
| Samsung Display Co. Ltd. | Strong · 56 | Strong · 56 | Strong · 34 | Moderate · 22 | Moderate · 14 |
| Canon Inc. | Strong · 45 | Strong · 46 | Strong · 25 | Moderate · 20 | Absent |
| LG Chem Ltd. | Strong · 38 | Strong · 39 | Moderate · 18 | Absent | Absent |
| SFC Co. Ltd. | Strong · 28 | Strong · 34 | Strong · 23 | Absent | Absent |
Frequently asked questions
The corpus covers 1,169 patent families globally. Filing volume grew from 23 families in 2017 to a peak of 318 in 2023, with the most recent years understated by publication lag.
Samsung Display Co. Ltd. leads with 202 patent families, followed by LG Display Co. Ltd. (147), Samsung Electronics Co. Ltd. (126), Universal Display Corporation (112), and Canon K.K. (53).
The top five applicants account for 50% of the hundred largest filers’ combined patent families, indicating a highly concentrated competitive landscape with a pronounced gap between the top tier and mid-tier players.
Universal Display Corporation shows the steepest upward momentum at 4.9× its prior three-year filing rate, followed by LG Display at +184% and Canon at +142%. Merck Patent GmbH is recorded as a new entrant in the recent window.
The United States is the dominant protection jurisdiction with 680 patent records, followed by Europe (EPO) at 213 and China at 185. South Korea and Japan, despite being home to several leading applicants, show relatively modest filing counts of 17 and 16 respectively.
Samsung Electronics and Samsung SDI have the most active co-filing relationship with 14 joint families. LG Display co-files with Rohm and Haas Electronic Materials Korea (12 families) and LT Materials (10 families). LG Display also collaborates with Korea University (5 families), reflecting a panel-maker/supplier/academic model of innovation.
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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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