Courts are increasingly upholding patents related to Organic Light-Emitting Diodes (OLEDs), intensifying intellectual property disputes among global display technology leaders. As the competition for technological dominance in the display market escalates, patent litigation is becoming a prominent feature of the industry landscape.
Major Players Entangled in OLED Patent Disputes
Recent rulings highlight a growing trend of patent protection in the OLED sector. On November 11th, the Seoul Central District Court ruled in favor of Samsung Display in a patent infringement lawsuit filed against Toptec, a domestic equipment manufacturer. The court found that Toptec infringed upon Samsung Display’s patents by exporting a ‘3D lamination’ device to China. If this verdict is confirmed, Toptec will be liable to pay Samsung Display approximately 390 million Korean won (roughly $300,000 USD) in damages.
Patent recognition is also extending to crucial material components. On October 14th, the Supreme Court ruled that a patent held by LG Chem concerning a ‘highly purified chemical compound for electronic applications’ is valid. This decision came after a legal challenge initiated by Hodo-Hoya, a Japanese chemical company, and SFC, a joint venture, against LG Chem’s patent registration. LG Chem has reportedly filed its own lawsuit seeking hundreds of millions of dollars in damages from SFC.
Further complicating the landscape, SFC secured a victory on October 29th in a lawsuit against SK Materials JNC (SKMJ), a subsidiary of SK Group. The dispute centered on patents for ‘blue dopants,’ a critical organic material for OLED displays that emits blue light. Should this ruling stand, SKMJ would be required to pay SFC 100 million Korean won (approximately $77,000 USD) in damages.
These recent court decisions collectively demonstrate a surge in patent disputes across the entire OLED value chain, encompassing equipment, materials, and essential chemical compounds. The consistent affirmation of patent infringements or the validity of patent registrations by the courts indicates a strengthening of patent protection frameworks within the OLED industry.
Escalating Penalties and Sales Halt Risks
The increasing recognition of patent rights is placing a significant legal burden on companies. While the damages in the aforementioned cases were in the hundreds of millions of won, patent infringement lawsuits can escalate to hundreds of billions of won, depending on factors such as the sales volume of the infringing technology and the determination of willful infringement.
The risk of punitive damages has also grown. Since 2019, a system allowing for up to three times the amount of damages has been in place for acts of patent infringement deemed intentional. This punitive damage cap was further expanded to five times the damages for willful patent infringement effective August 2024.
Hwang Eun-jung, a patent attorney at Hwang Eun-jung Law Firm, commented, “While cases of punitive damages being recognized in Korea are still relatively few, requiring conditions such as intent or a dominant market position of large corporations, companies must exercise caution. If intentional infringement of another party’s patent is recognized, the damages awarded can significantly increase.”
Beyond financial penalties, patent infringement can lead to restrictions on the production and sale of affected products. According to Article 126 of the Patent Act, patent holders can seek injunctions against infringement or threatened infringement, as well as demand the destruction of infringing goods and the removal of equipment used in the infringing activities.
The more deeply a technology is embedded in specific processes or products, such as OLED equipment or materials, the more profound the impact of litigation outcomes on business operations can be.
China’s Pursuit and Wearable Demand Fuel Patent Competition
Industry observers attribute the recent surge in litigation to the intensifying competition within the OLED market. A senior patent attorney from a major law firm stated, “Following the LCD market, the technological gap with Chinese companies in the OLED sector is rapidly closing. To enforce patents against Chinese companies, domestic firms need to clearly define their scope of rights and validity first.”
The expansion of next-generation wearable devices, such as smart glasses, is also cited as a driving factor for increased OLED patent competition. OLEDs, known for their thinness, lightness, and superior picture quality, are finding applications beyond smartphones and televisions, extending to automotive displays, extended reality (XR) devices, and smart glasses.
As demand diversifies, competition among companies seeking to secure relevant technologies is bound to intensify. Consequently, companies are now meticulously considering how to define the scope of their rights from the early stages of patent applications. Their aim is to secure novelty and inventive step for patent recognition while simultaneously preventing competitors from easily developing similar patents by slightly modifying certain elements or from circumventing existing patents.
Kim Ye-ji, a patent attorney at SUAN Law Firm, who is a former Samsung Electronics legal team member, explained, “The narrower the scope of a patent is defined, the higher the likelihood of obtaining patent approval. However, if the scope is too narrow, there is a risk that competitors can easily develop other patents by avoiding that specific area.”
