Press release

Seoul Semiconductor Files 2nd Patent Litigation against Distributor of Philips TV Products for Infringement of LCD Backlight System Technology

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Semiconductor Co., Ltd.
(KOSDAQ 046890) (“Seoul”), a leading global
innovator of LED products and technology, announced that it has filed a
patent infringement lawsuit in the United States District Court for the
Central District of California, against The Factory Depot Advantages
Inc., a distributor of Philips TV display.

In its complaint, Seoul asserts that a Philips LED TV display being sold
by this distributor infringe 10 (“ten”) patents regarding manufacturing
of LED backlighting unit. Particularly, these patented technologies
encompass LED TV backlight unit system for enhancing Color Gamut of LCD
displays, and LED lenses for providing uniform illumination on LCD

Seoul made significant R&D efforts since the beginning of the LED
backlight technology, and has established thousands of LED chip/package
patents, 150 of optical lens patents, and 200 of high color phosphor
application patents.

This is the 2nd litigation Seoul has filed a patent infringement lawsuit
against a Philips TV product distributor. In the past 2018, Seoul filed
a patent litigation for infringement of 19 patents against Fry’s
Electronics, a U.S. big box retailer that sold allegedly infringing TV
products. That litigation is also currently ongoing in the United States
District Court for the Eastern District of Texas.

“In order to protect our LED backlight system technology, we have
demanded a cease of infringement against global TV companies, TV ODM/
OEM manufacturers, and LCD display manufacturers operating in the US,
Europe and Asia,” said Sam Ryu, Seoul’s Vice President of IT Business.
“To establish fair market competition culture, wrong practice –
attempting unfair competition by using low-cost components that infringe
hard-earned patents – should be eliminated.”

About Seoul Semiconductor

Seoul Semiconductor develops and commercializes LEDs for automotive,
general illumination, specialty lighting, and backlighting markets. As
the second-largest LED manufacturer globally excluding the captive
market, Seoul Semiconductor holds more than 14,000 patents, offers a
wide range of technologies, and mass produces innovative LED products
such as SunLike – delivering the world’s best light quality in a
next-generation LED enabling human-centric lighting optimized for
circadian rhythms; WICOP – a simpler structured package-free LED which
provides market leading color uniformity and cost savings at the fixture
level, providing high lumen density and design flexibility; NanoDriver
Series – the world’s smallest 24W DC LED drivers; Acrich, the world’s
first high-voltage AC-driven LED technology developed in 2005, including
all AC LED-related technologies from chip to module and circuit
fabrication, and nPola, a new LED product based on GaN-substrate
technology that achieves more than ten times the output of conventional
LEDs. UCD constitutes a high color gamut display which delivers more
than 90% NTSC. For more information, please visit