OLED Panel Optical/Electrical Test Patent Snapshot
The OLED panel optical/electrical test patent space is fragmented, with no single applicant commanding more than a small share of the 31 patent families in scope and activity concentrated heavily in China. Annual filing volume peaked in 2019 and has since eased, placing the field in a declining phase, though a cluster of specialized equipment and imaging entrants signals continued incremental activity.
A fragmented field led by Tianma, with China dominant
Wuhan Tianma Micro Electronics Co Ltd and Tianma Micro Electronics Co Ltd together sit atop the applicant ranking, each holding 4 patent records, followed by LG Display Co Ltd with 3. The top five filers account for 24% of the combined output of the ranked applicants visible in this query, indicating a highly distributed assignee snapshot rather than a concentrated oligopoly.
No single entity controls the agenda: beyond the Tianma entities and LG Display, a long tail of companies and individuals each hold 2 or fewer patent records. This flat distribution means the technology remains contestable and no incumbency moat is yet visible from filing volume alone.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Wuhan Tianma Micro Electronics Co Ltd | 4 | |
| 2 | Tianma Micro Electronics Co Ltd | 4 | |
| 3 | LG Display Co Ltd | 3 | |
| 4 | Eastman Kodak Company | 2 | |
| 5 | Guilin Machine Tool Electrical Co Ltd | 2 | |
| 6 | RIVERS ANDREA S | 2 | |
| 7 | Jihua Laboratory | 2 | |
| 8 | Suzhou Luster Guang Industrial Intelligence Technology Co Ltd | 2 | |
| 9 | BOROSON MICHAEL LOUIS | 2 | |
| 10 | HB Solution Co Ltd | 2 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | BEIJING C&W ELECTRONICS GRP | 2 | |
| 12 | Zhaoqing Zhongdao Optoelectronics Equipment Corporation | 2 | |
| 13 | International Business Machines Corporation | 2 | |
| 14 | Dialog Semiconductor GmbH | 2 | |
| 15 | Jiangsu Heyi Guangxian Technology Co Ltd | 2 | |
| 16 | Wuhan Tianma Microelectronics Co Ltd Shanghai Branch | 2 | |
| 17 | Beijing Luster LightTech Co Ltd | 2 | |
| 18 | TCL China Star Optoelectronics Technology Co Ltd | 2 | |
| 19 | Global OLED Technology LLC | 2 | |
| 20 | BEIJING C&W TECH DEV | 1 |
The Tianma entities’ focus on display control circuits (G09G) positions them primarily on the drive-circuit side of testing, while Eastman Kodak and LG Display emphasise optical characterisation and organic semiconductor measurement — a division that leaves room for entrants specialising in integrated optical-electrical platforms.
The most recent 18–24 months of filings are subject to publication lag and will be under-counted in this corpus; apparent low activity in 2024–2025 should not be read as a confirmed further decline. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Peak in 2019, followed by easing volume and a broad IPC mix
The annual filing trend reveals a field that surged to a 2019 peak before settling back, while the IPC composition shows material-analysis testing (G01N) and display-control circuits (G09G) as the two visible technical branches with several adjacent branches remaining lightly covered.
Annual filing trend
Filings reached 7 in 2019 before declining to low single digits in subsequent years; 2024–2025 data remain subject to publication lag and should be treated as provisional. The overall pattern is consistent with a field that expanded through the late 2010s and has since stabilised at a lower run rate rather than continuing to grow.
↗ Hover for values · click a bar to ask EurekaTechnology composition
G01N (material analysis and testing) and G09G (display control circuits) together account for the largest share of IPC class coverage, reflecting a split between optical characterisation methods and electronic pixel-circuit verification. H01L (semiconductor devices) and H10K (organic semiconductors/OLED) follow at lower counts, while G01M, G01B, G01R, and G06T each appear at single-digit levels, marking adjacent branches that are sparsely populated.
↗ 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 in which each drive signal line…
The present disclosure provides an OLED display panel and a method for detecting the OLED display panel, and a display device. The OLED display panel includes a base substrate including a display area and a non-display area surrounding the display area and having a first region adjacent to the display area. The display area includes a drive signal line and… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | OLED显示装置驱动电路缺陷检测方法 | 27 |
| 2 | OLED像素驱动电路、静电释放保护电路及检测方法 | 26 |
| 3 | OLED pixel driving circuit, electrostatic discharg… | 23 |
| 4 | 一种面向OLED屏像素缺陷检测的方法及装置 | 20 |
| 5 | OLED面板显示缺陷修复方法 | 19 |
| 6 | Inspection apparatus and inspection method using t… | 17 |
| 7 | Thin film transistor array, display panel, method … | 17 |
| 8 | Driver chip based oled module connectivity test | 14 |
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
Four dimensions — maturity, concentration, collaboration, and geography — shape the investment case for new entrants and incumbents alike in OLED panel optical/electrical testing.
Declining phase: annual volume eased from a 2019 peak
The lifecycle evidence places the field in decline, with annual filings having eased back from the 2019 peak of 7 and the recent-window growth rate at –50%. Core optical inspection and drive-circuit test methods appear to be approaching maturity, which historically creates pressure on marginal inventors to differentiate or exit. New entrants face a higher bar for novelty but benefit from a well-documented prior-art landscape.
Lifecycle: DeclineFlat hierarchy — no visible blocker
The top five filers hold only 24% of the ranked applicants visible in this query’ combined output, and the ranking drops steeply after the Tianma entities and LG Display. This shallow concentration means no single assignee can credibly fence off the entire testing design space. A focused portfolio of 3–5 well-drafted families in an under-served branch could achieve above-average relative visibility in this corpus.
Low concentrationTwo co-filing pairs identified — both within corporate families
The most active co-filing relationship is between Tianma Micro Electronics Co Ltd and Shanghai Tianma Organic Light-Emitting Display Technology Co Ltd, with 4 joint records, reflecting intra-group collaboration within the Tianma corporate structure. Suzhou Lingyu Guang Industrial Intelligence Technology Co Ltd and Luster LightTech Co Ltd filed 2 records together, representing a supplier-integrator pairing in machine-vision-based inspection. No cross-industry or academic-industrial alliances are visible at scale in this corpus.
Intra-group visibleChina leads filings; US and Korea present but secondary
China accounts for 32 patent records at the jurisdiction level, making it the primary filing venue by a wide margin. The United States follows with 11 records, South Korea and WIPO (PCT) each register 3, and Europe (EPO) shows 1. The China-heavy profile reflects both the concentration of OLED panel manufacturing and the domestic R&D programmes of Tianma and TCL China Star. Applicants seeking international protection beyond China currently represent a minority, which may indicate room for broader PCT or EPO filings on novel test methods.
China-visibleGo 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 |
|---|---|---|
| Tianma Micro Electronics Co Ltd | Shanghai Tianma Organic Light-Emitting Display Technology Co Ltd | 4 |
| Suzhou Luster Guang Industrial Intelligence Technology Co Ltd | Luster LightTech Co Ltd | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
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.
Tianma Micro Electronics Co Ltd
Tianma Micro Electronics Co Ltd holds 4 patent records, tied at the top of the ranking with its affiliate Wuhan Tianma Micro Electronics Co Ltd. Its filings concentrate on G09G 3 (display control circuits), reflecting a focus on pixel-circuit-level electrical verification rather than optical surface inspection. The Tianma group’s intra-group collaboration with Shanghai Tianma Organic Light-Emitting Display Technology Co Ltd accounts for the strongest co-filing pair in the corpus.
patent records: 4Suzhou Luster Guang Industrial Intelligence Technology Co Ltd
Suzhou Luster Guang Industrial Intelligence Technology Co Ltd holds 2 patent records and is flagged as a new entrant in the recent filing window, making it the only applicant in this corpus with a positive momentum signal. Its technical emphasis spans G01N 21 (optical material analysis) and G06T 7 (image data processing), positioning it as a machine-vision-led inspection specialist — a differentiated angle relative to the circuit-centric leaders.
patent records: 2Frequently asked questions
The corpus analysed here contains 31 patent families in scope, filed across multiple jurisdictions with China, the United States, and South Korea as the primary venues.
Wuhan Tianma Micro Electronics Co Ltd and Tianma Micro Electronics Co Ltd each hold 4 patent records, placing them jointly at the top of the ranking. LG Display Co Ltd follows with 3, and Eastman Kodak Co holds 2.
No — the lifecycle evidence places the field in a declining phase. Annual filings peaked in 2019 and have eased back since. The most recent 12–24 months are subject to publication lag, so provisional 2024–2025 data should be interpreted cautiously, but the overall trend is downward from the 2019 peak.
G01N (material analysis and testing) and G09G (display control circuits) are the most densely covered branches. G01M (mechanical/structural testing), G01B (dimensional measurement), and G01R (electrical/magnetic measurement) each carry only 4–5 patent records, making them the most sparsely populated adjacent branches in this corpus.
China is the visible jurisdiction with 32 patent records at the jurisdiction level. The United States follows with 11, South Korea and WIPO (PCT) each register 3, and Europe (EPO) has 1. The strong China weighting reflects where OLED panel manufacturing and associated R&D are concentrated.
Two co-filing pairs are identifiable. The strongest is between Tianma Micro Electronics Co Ltd and Shanghai Tianma Organic Light-Emitting Display Technology Co Ltd, with 4 jointly filed records — an intra-group pairing within the Tianma corporate structure. Suzhou Luster Guang Industrial Intelligence Technology Co Ltd and Luster LightTech Co Ltd co-filed 2 records, representing a supplier-integrator collaboration in machine-vision inspection.
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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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