EpiPix was spun-off from The University of Sheffield in the UK, to commercialize technology for multi-color microLED arrays on a single wafer developed at the University's GaN Centre for Materials and Devices.
The company developed red, green and blue microLED epiwafers with a pixel size ranging from 30 microns down to less than 5 microns. EpiPix said that it achieved record-breaking IQE results. The company does not seem to be in business.
Epistar Corp, based in Taiwan and established in 1996, is one of the world's largest LED producers. The company specializes in high-brightness LED devices for general lighting and consumer electronics. Epistar is part of Ennostar (following a merger with fellow Taiwanese LED maker Lextar in 2020).
Epistar is developing Micro LED chips but has yet to announce any products or market intentions. Some reports suggest that Epistar is likely to first produce 100-micron LEDs (in 2017) to be used in large displays. This will be followed by smaller LEDs for smaller displays.
In October 2018 Epistar established a wholly-owned subsidiary called Yenrich Technology that develops applications for mini LED and micro LED technologies. In 2025 Epistar fully merged into Ennostar and is no longer an independent company.
Established in 2008 in Taiwan as a subsidiary of AU Optronics, Lextar Electronics Corporation is a leading LED developer. Lextar produces LED chips, LCD backlights, automotive LEDs, lumiaires and other lighting solutions. In 2018 Lextar introduced its first micro-LED chips - both RGB ones and color conversion ones, both suitable for mass transfer processes.
In 2020 Lextar announced a merger with fellow Taiwanese LED maker Epistar, and the company is now part of Ennostar.
MagnaChip is a Korean designer and manufacturer of analog and mixed-signal semiconductor products for high-volume consumer applications. The company's main markets are Semiconductor Manufacturing Services, Display solutions and Power solutions. MagnaChip was a leading designer of AMOLED driver ICs.
In 2019 MagnaChip announced it is also developing driver ICs for Micro-LED TVs. In 2025, MagnaChip abandoned display market to focus on the power electronics market.
Japan-based Micro Nitride was established in 2018 as a subsidiary of Nitride Semiconductors to develop micro UV LED chips for Micro-LED displays.
Micro Nitride's technology, called μUV-LED+RGB phosphor, uses UV micro-LEDs and RGB phosphors. Later the company was shut-down and the technology was reverted back to Nitride Semiconductors.
mLED Ltd was established in 2010 in Scotland as a spin-off from the University of Strathclyde in Glasgow, with funding led by the Braveheart Investment Group.
mLED was developing micro-LED displays with a focus on wearable devices and heads-up displays (HUDs), using a production platform based on printing and lithography. The company is no longer in business.
Established in 2008 and based in the UK, Optovate developed GaN-based micro-LED technologies.
Optovate developed a scalable and cost-effective micro-LED transfer technique and it has also developed a way to produce and integrate a precision micro-catadioptric optical array that combines refraction and reflection of light from each of the micro-LEDs.
In 2019 the company was sold to Rain Technology.
Ireland-based Rapt Touch (RAPT) is a provider of optical multi-touch systems for display makers and systems integrators. RAPT developed a unique and patented optical touch technology that is fully compatible with microLED displays, at all sizes.
RAPT's FTIR technology is based on low-cost LEDs that create an optical mesh of infrared light signals, read by photodetectors. The LEDs and the photodetectors are placed on the edge of the display. The performance is not affected by capacitive coupling or display pattern noise, and can be used on any screen size.
RAPT's solution offers superb optical and touch performance and is highly compatible with OLED and microLED displays. The technology is cost effective as it is based on off-the-shelf components and its costs grow linearly with size (unlike other touch solutions).
RAPT Touch is a privately held company, with over 90 issued patents. RAPT’s products have already been deployed in several projects and systems, including Google’s 55” Jamboard, and HiteVision products.
US-based Rohinni, established in 2013, focused on miniLED and microLED technologies for lighting and displays.
Rohinni has developed precise placement technology that can achieve speeds greater than 100Hz for mini LEDs. The company has achieved mass product production volumes with the keyboard and logo backlighting joint venture, Luumii. In addition to this market, Rohinni's technology has been adopted in the display, automotive and consumer electronics markets.
In August 2018 Rohinni announced a JV with Magna Electronics to bring mini-LED and micro-LED lighting devices to the automotive market. In 2019 Rohinni announced a new joint venture with China-based display maker BOE to develop LCD mini-LED and micro-LED backlighting units. The JV with BOE is called BOE Pixey.
In early 2024, the company filed for bankruptcy and has ceased operations.
UK-based Seren Photonics was a manufacturer of semipolar and nonpolar Gallium Nitride templates.
For the Micro-LED market, Seren developed a suite of long wavelength LED epitaxy on its novel semipolar GaN aimed at delivering higher efficiency and more color stable green, yellow and red devices. Seren said that its semipolar enabled LEDs overcome shortcomings of green LEDs manufactured on polar GaN, mainly low wall plug efficiency and poor wavelength stability over a range of current densities.
The company seems no longer to be in business.
