OLED Charge-Injection Interface Patent Landscape 2026
The OLED charge-injection interface field is highly concentrated, with LG Display and Samsung Display together commanding the top two positions among 757 patent families in scope. The field is still expanding on a multi-year basis, though annual volume has eased from its 2023 peak as Korean panel makers and new material entrants compete intensely across device-layer and molecular design.
LG Display and Samsung Display lead a highly concentrated field
LG Display Co., Ltd. holds the top position with 216 patent families, followed closely by Samsung Display Co., Ltd. with 201 patent families. Canon and Merck. Patent GmbH rank third and fourth, together adding meaningful depth to the field’s upper tier.
The top five filers account for 72% of the combined total among the hundred largest filers — a concentration level that signals a well-defended core. The gap between the top two and the rest of the ranking is substantial, with BOE Technology Group Co., Ltd. at fifth place holding 36 patent families, less than one-fifth of the leader’s count.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | LG Display Co., Ltd. | 216 | |
| 2 | Samsung Display Co., Ltd. | 201 | |
| 3 | Canon Inc. | 93 | |
| 4 | Merck Patent GmbH | 81 | |
| 5 | BOE Technology Group Co., Ltd. | 36 | |
| 6 | LG Chem, Ltd. | 28 | |
| 7 | Samsung Electronics Co., Ltd. | 21 | |
| 8 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | 13 | |
| 9 | Novaled GmbH | 12 | |
| 10 | LT Materials Co., Ltd. | 10 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Chengdu BOE Optoelectronics Technology Co., Ltd. | 9 | |
| 12 | Universal Display Corporation | 9 | |
| 13 | OLEDWorks LLC | 8 | |
| 14 | Huawei Technologies Co., Ltd. | 7 | |
| 15 | KOREA UNIV RES & BUSINESS FOUND | 6 | |
| 16 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | 6 | |
| 17 | Hubei Yangtze Industry Innovation Center of Advanced Display | 6 | |
| 18 | Global OLED Technology LLC | 6 | |
| 19 | TECHNICAL INST OF PHYSICS & CHEMISTRY – CHINESE AC… | 5 | |
| 20 | 3M Innovative Properties Company | 4 |
LG Display’s and Samsung Display’s positions reflect vertically integrated strategies spanning OLED device architecture and organic semiconductor materials, making head-on competition in established sub-routes particularly difficult for new entrants without differentiated material or process IP.
Filing counts for 2024–2026 are understated due to standard patent publication lag of 18–24 months and should not be read as a slowdown in activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Multi-year growth with a 2023 peak; device-layer chemistry dominates the mix
Annual filings grew sharply from 2019 onward and reached a peak in 2023, reflecting the field’s growth-stage dynamics. The technology mix is heavily weighted toward organic semiconductor device architecture, with adjacent chemistry branches adding material depth.
Annual filing trend
Filings accelerated from 14 in 2017 to a peak of 226 in 2023, representing a roughly 16-fold increase over that window. The apparent step-down in 2024 and 2025 reflects publication lag rather than a real contraction; the three-year recent window sits 194% above the prior three-year window, confirming sustained multi-year expansion.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H10K (organic semiconductors / OLED devices) is the dominant IPC branch by a wide margin, anchoring the corpus in device-layer innovation. C09K (materials for miscellaneous applications) and C07F (organo-metallic and non-carbon compounds) form the next tier, signaling active work on emissive and injection-layer molecular design. Downstream branches such as H01L (semiconductor devices) and C07D (heterocyclic compounds) represent smaller but technically distinct sub-areas.
↗ 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.
OLED display panel and OLED display device
An organic light-emitting diode (OLED) display panel and an OLED display device are provided. In the OLED display panel, a thickness of an electronic layer is set to be less than a first default value, and/or a material mobility of at least one of the electronic layer or a common electrode layer is set to be greater than a second default value. The… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | New polymer comprising structural unit which compr… | 13 |
| 2 | Electronic device | 12 |
| 3 | Organic light-emitting display and method of manuf… | 11 |
| 4 | Display device | 6 |
| 5 | 显示面板、显示屏和电子设备 | 5 |
| 6 | Display panel and display device provided with hea… | 5 |
| 7 | Ortho-substituted thermally activated delayed fluo… | 4 |
| 8 | 一种叠层有机电致发光器件及其应用 | 4 |
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 investment
The combination of high concentration, strong multi-year growth, and active cross-sector collaboration shapes where differentiated IP can still be built. The four dimensions below frame the key strategic considerations.
Growth stage — past 2023 peak, multi-year expansion intact
The field is classified as Growth: recent three-year filings sit 194% above the prior three-year window. Annual volume peaked in 2023 and has eased since, but publication lag means the true recent rate is higher than raw counts suggest. For R&D planners, the window for staking out foundational positions is narrowing but not closed.
Growth stageTop-heavy ranking creates high barriers in core device-layer routes
The top five filers hold 72% of the hundred largest filers’ combined total. LG Display and Samsung Display alone account for the majority of that share, with Canon and Merck Patent GmbH forming a secondary tier. New entrants face significant freedom-to-operate challenges in H10K-dominant sub-routes and should prioritize molecular design or process differentiation to avoid direct overlap.
High concentrationLG Display is the most active co-filer, linking panel makers to material suppliers and universities
LG Display Co., Ltd. leads collaboration activity, filing jointly with LT Materials Co., Ltd. (10 co-filed families), Rohm and Haas Electronic Materials Korea (6), Korea University (5), and DuPont Specialty Materials Korea (4). BOE Technology Group co-files with Chengdu BOE Optoelectronics Technology (9 families) and Hefei BOE Zhuoyin Technology (2). Samsung Electronics co-files with Sungkyunkwan University (3) and Ewha Womans University (2). The pattern shows panel-maker-led consortia drawing on specialty chemical suppliers and academic groups for molecular innovation.
Ecosystem co-filingUS office dominates filings; Europe and PCT provide secondary protection
The United States is the lead filing jurisdiction, followed by the European Patent Office and Germany. WIPO PCT filings provide a route to broader international coverage. China, as a growing panel-manufacturing base, shows a comparatively modest filing count at this jurisdiction, while Japan and South Korea trail further — suggesting that some Korean and Japanese applicants prioritize US and EP protection over home-office filings for this technology.
US-led geographyGo 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 |
|---|---|---|
| LG Display Co., Ltd. | LT Materials Co., Ltd. | 10 |
| BOE Technology Group Co., Ltd. | Chengdu BOE Optoelectronics Technology Co., Ltd. | 9 |
| LG Display Co., Ltd. | Rohm and Haas Electronic Materials Korea | 6 |
| LG Display Co., Ltd. | Korea University | 5 |
| LG Display Co., Ltd. | DuPont Specialty Materials Korea | 4 |
| Samsung Electronics Co., Ltd. | Sungkyunkwan University | 3 |
| LG Display Co., Ltd. | LG Chem, Ltd. | 2 |
| Merck Patent GmbH | Jacobs University Bremen gGmbH | 2 |
| BOE Technology Group Co., Ltd. | Hefei BOE Zhuoyin Technology Co., Ltd. | 2 |
| Samsung Electronics Co., Ltd. | Ewha Womans University | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
LG Display and Samsung Display set the pace; Canon and Merck entering at scale
The top four applicants separate themselves clearly from the rest of the ranking. LG Display and Samsung Display are both accelerating from a strong base, while Canon and Merck. Patent GmbH appear as new entrants in the recent period, signaling strategic expansion into this sub-field.
LG Display Co., Ltd.
Holds 216 patent families and shows a momentum trend of +158% in the recent filing period. Technology focus is concentrated on H10K 50 (OLED device architecture, 184 families), H10K 85 (organic semiconductor materials, 151 families), and C09K 11 (luminescent materials, 80 families), reflecting a vertically integrated strategy spanning device stack design and emissive-layer chemistry. Active co-filing with material suppliers and universities reinforces this position.
families: 216Samsung Display Co., Ltd.
Holds 201 patent families with a momentum trend of +174%, the fastest growth rate among the top two. Primary focus falls on H10K 50 (175 families), H10K 59 (pixelated OLED arrays, 109 families), and H10K 85 (68 families), indicating a display-panel-centric approach with strong emphasis on patterned device structures alongside materials. The near-parity with LG Display makes this the most competitive pairing in the landscape.
families: 201| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| LG Display Co., Ltd. | 147 | ▲ +158% |
| Samsung Display Co., Ltd. | 107 | ▲ +174% |
| Canon Inc. | 67 | ▲ new entrant |
| Merck Patent GmbH | 37 | ▲ new entrant |
| BOE Technology Group Co., Ltd. | 15 | ▲ +7% |
| Samsung Electronics Co., Ltd. | 14 | ▲ new entrant |
| LG Chem, Ltd. | 23 | ▲ new entrant |
| Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | 6 | ▲ new entrant |
Under-served branches in organo-metallic chemistry and semiconductor device integration
Relative to the dominant H10K device-architecture core, several adjacent IPC branches show lower patent density despite plausible technical relevance to charge-injection performance. These are observations of relative sparsity; entry-path feasibility depends on each applicant’s existing IP base and capability.
C07F · Organo-metallic & non-carbon compounds
This branch covers the synthesis of metal-complex and organometallic compounds directly relevant to charge-injection and electron-transport layer materials in OLEDs. With 124 patent records and an 8% share of the corpus, it is notably less dense than the H10K device-layer core. The technical link is direct — novel metal-complex dopants can improve injection barrier reduction — and entrants with organic synthesis capability may find differentiated molecular scaffolds with limited prior art overlap.
Search this in Eureka →C07D · Heterocyclic compounds
Heterocyclic organic compounds underpin many hole-transport and electron-injection layer materials. At 106 patent records and a 7% share, this branch sits adjacent to the crowded H10K core. Applicants with heterocyclic synthesis expertise — particularly in nitrogen-rich ring systems relevant to TADF or MR-TADF emitter-adjacent layers — may find sparser competitive territory here relative to assembled-device patents.
Search this in Eureka →How leaders differ by technology route across charge-injection sub-fields
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.) | H10K 59 · Organic semiconductors (OLED etc.) | C09K 11 · Materials for misc. applications | H10K 101 · Organic semiconductors (OLED etc.) |
|---|---|---|---|---|---|
| LG Display Co., Ltd. | Strong · 184 | Strong · 151 | Moderate · 67 | Moderate · 80 | Moderate · 43 |
| Samsung Display Co., Ltd. | Strong · 175 | Moderate · 68 | Strong · 109 | Moderate · 36 | Emerging · 13 |
| Canon Inc. | Strong · 82 | Strong · 74 | Moderate · 30 | Strong · 42 | Moderate · 32 |
| Merck Patent GmbH | Strong · 65 | Strong · 70 | Absent | Moderate · 34 | Moderate · 28 |
| Samsung Electronics Co., Ltd. | Strong · 24 | Strong · 25 | Absent | Strong · 16 | Strong · 17 |
| BOE Technology Group Co., Ltd. | Strong · 36 | Absent | Strong · 27 | Absent | Emerging · 3 |
| LG Chem, Ltd. | Strong · 26 | Strong · 25 | Absent | Moderate · 7 | Emerging · 5 |
Frequently asked questions
The corpus in scope contains 757 patent families. This figure covers the global landscape as indexed, and the most recent 18–24 months are undercounted due to standard patent publication lag.
LG Display Co., Ltd. leads with 216 patent families, followed closely by Samsung Display Co., Ltd. with 201 patent families. Together these two organizations represent the dominant positions in the field.
The field is classified as Growth. Recent three-year filings are 194% above the prior three-year window. Annual volume peaked in 2023 and has eased since, but this is partly a publication-lag effect; the multi-year trajectory remains strongly upward.
The United States is the lead filing jurisdiction, followed by the European Patent Office and Germany. WIPO PCT filings provide a route to broader international coverage. China, Japan, and South Korea represent smaller shares in this corpus.
LG Display Co., Ltd. is the most active co-filer, with notable co-filing relationships with LT Materials Co., Ltd. (10 joint families), Rohm and Haas Electronic Materials Korea (6), Korea University (5), and DuPont Specialty Materials Korea (4). BOE Technology Group co-files actively with its subsidiary Chengdu BOE Optoelectronics Technology.
The branches C07F (organo-metallic and non-carbon compounds, 124 patent records, 8% share) and C07D (heterocyclic compounds, 106 patent records, 7% share) are notably less dense than the dominant H10K device-architecture core, making them adjacent areas worth evaluating for applicants with relevant synthesis capabilities. These are observations of relative sparsity, not validated commercial opportunities.
Ready to map your own OLED charge-injection interface landscape?
Join 18,000+ innovators using PatSnap Eureka to map any technology landscape: search 2B+ patents and papers, surface key assignees, and generate a report like this in minutes.
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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. PatSnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.