Business | Company News | Intellectual Properties | Jun 08, 2017

Seoul Semiconductor Resolves LED Filament Bulb Lawsuit against Global Retailer Kmart and Pursues Further Patent Enforcement Initiatives

Seoul Semiconductor Co., Ltd. and Seoul Viosys Co., Ltd. (collectively “Seoul”) announced that they have resolved a patent litigation that was filed on behalf of Seoul and The Regents of the University of California against Kmart Corporation. The patent case was filed in U.S. Federal District Court, asserting infringement of eight patents based upon Kmart’s sales of Kodak/Spotlite branded filament LED bulbs.

As part of the settlement, Kmart agreed to stop selling Kodak/Spotlite branded filament LED bulbs. The asserted eight patents in this litigation relate to essential structures of filament LED products, including high CRI enhancement with phosphor combinations, LED epitaxial growth, LED chip fabrication, multi-chip mounting technology, omnidirectional LED lamp technology, and Acrich MJT technology.  

Other Enforcement Initiatives
In addition to the enforcement action against an LED filament bulb retailer, Seoul has sent warnings to manufacturers of LED filament bulbs as well as other LED lighting products to cease any infringement of Seoul’s patents.

The LED filament bulbs rapidly became popular in the decorative lighting market. Currently, filament LED end products are manufactured by many lighting manufacturers, such as Super Trend Lighting, Longstar Lighting, Topstar Lighting, and Yankon Lighting. Seoul has already put manufacturers of various LED lighting products on notice of its patents and requested that sales of any infringing products must be immediately ceased.

Nam Ki-bum, Executive Vice President of the Research Center at Seoul, said, “We believe various LED lighting products currently on the market infringe Seoul’s patents. Now that we have resolved one litigation in this area, we will devote more resources to actively protecting our valuable intellectual property rights relating to LED products.” He added, “Distributors should also take active precautionary measures not to sell infringing products. As long as such measures have not been taken, we will continuously take legal action against manufacturers and distributors relating to suspected infringing products in any countries where infringement occurs.”

About Seoul Semiconductor:
Seoul Semiconductor develops and commercializes light emitting diodes (LEDs) for automotive, general illumination, specialty lighting, and backlighting markets. As the fifth-largest LED manufacturer globally, Seoul Semiconductor holds more than 12,000 patents, offers a wide range of technologies, and mass produces innovative LED products such as Wicop – a simpler structured Package-Free LED which provides market leading color uniformity, cost savings at the fixture level with high lumen density and allows design flexibility; Acrich, the world's leading direct AC LED; Acrich MJT multi-junction technology; a proprietary family of high-voltage LEDs; NanoDriver Series – World’s Smallest 24W DC LED Drivers and nPola, a new LED product based on GaN-substrate technology that achieves over ten times the output of conventional LEDs.

For more information about Seoul Semiconductor, please visit

# Trademarks: Wicop and Acrich are trademarks of Seoul Semiconductor Co., Ltd.


Samsung LED Pushes Efficiency of Mid-power Packages to Higher Levels

Samsung LED Pushes Efficiency of Mid-power Packages to Higher Levels Samsung Electronics has announced that it has made an important upgrade in the luminous efficacy of its mid-power LED package. The LM301B was introduced to the market with the industry’s highest light efficacy among mid-power LED packages in 2017. Now, it has enhanced the efficacy considerably ... Read more »


LED Patent Lawsuit

Tridonic initiated patent lawsuits against telecommunication retailer S-KON eKontor24 GmbH. Although District Court Munich I affirmed Tridonic’s arguments, parties agreed on a settlement for reasons of legal certainty and prompt settlement of the dispute. Read more »


Proof Your Blue Light Hazard Risk: Stray Light Corrected CAS 140D

Proof Your Blue Light Hazard Risk: Stray Light Corrected CAS 140D With the stray light corrected CAS 140D Instrument Systems – as a technical pioneer – is the first to offer an array spectrometer that can reliably assess the blue light hazard from light sources within the prescribed limiting values. Hitherto only double monochromators were recommended for this ... Read more »


Edison Opto Unveils Two Novel-Designed Products in EdiPower Series

Edison Opto Unveils Two Novel-Designed Products in EdiPower Series Edison Opto, a global LED lighting manufacturer, unveils two new products in EdiPower Series for broad lighting applications. First, the Tunable Series with superior CRI of 95 supports two output channels to enable two dimming options to dim LED lighting without a brightness drop. In addition, the ... Read more »


High Conductive Foils Enabling Large Area Lighting

High Conductive Foils Enabling Large Area Lighting Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP as one of the leading partners for research and development for surface technologies and organic electronics and Sefar AG, a leading manufacturer of precision fabrics from monofilaments, developed a roll-to-roll ... Read more »