US-based Innovation Semiconductor developed (and patented) a monolithic vertical architecture for the production of MicroLED microdisplays, based on a 3D nanowire structure, a single material system and a straightforward and conventional integration between LEDs and GaN transistor.
The company seems to be at an early stage, and has yet to demonstrate its technology.
China-based Innovision develops microLED microdisplays, based on the company's vertically-stacked pixel (VSP) technology. The company's microdisplays are said to achieve high display densities and efficient operation.
In November 2022, Innovision raised its Series-A funding round of a few USD millions.
Sitan Technology, established in Shenzhen, China in 2018, develops and produces microLED chips and display modules, including microLED microdisplays. In addition, Sitan offers microLED drivers and inspection equipment. The company has a microLED pilot production line in Longhua, Shenzhen.
Sitan Technology has completed several round of financing, with investors including Xiaomi, Sequoia China, and others.
China-based Leyard Optoelectronic, established in 1995, produces LED based products, including displays and lighting. The company's main business is large-area LED screens.
In 2020, Leyard announced its entry into the microLED industry, with a partnership with Epister to setup a Mini-LED and Micro-LED production site in Wuxi, China, in a $142 million investment. In 2021 CHN Energy Investment has installed the world's largest microLED display (216-sqm) using Leyard's displays.
Leyard is a public company that trades on the Shenzhen Stock Exchange. Leyard holds 12% in Saphlux, and will adopt its NPDQ color conversion technology in its future microLED displays.
US-based Kura Technologies, established in 2016, develops augmented reality (AR) glasses, and related technologies. The company has wide backing from a range of investors and Universities.
Kura's AR glasses are powered by a microLED microdisplay that company the develops in-house. Kura is also developing its own display controller chipset. The company's Gallium AR glasses offer 8K resolution, full-color, ultra-high brightness and a 150-degree FOV.
US-based SiliconCore, established in 1997, develops driver chips for LED displays, and large scale indoor displays. SiliconCore says that its Common Cathode technology enables the highest performance, coolest operating and brightest direct-emission LED displays.
In recent years SiliconCore develops displays based on miniLEDs and microLEDs.
US-based Raxium, established in 2017, develops microLED microdisplay technologies.
Raxium did not reveal much about its technology, beyond saying that it developed a monolithic approach to develop microLED microdisplays, with a pixel pitch of 3.5 um.
In early 2022 it was reported that Google acquired the company.
STRATACACHE is a digital signage, merchandising and customer engagement systems developer, targeting the retail, restaurants, banking and financing, gaming, events and education markets.
STRATACACHE is constructing the first US-based complete display production facility in Eugene, Oregon, the future MicroLED E4 fab.
Hong Kong based Raysolve Optoelectronics, established in 2019, is a fabless microLED microdisplay producer. The company develops microdisplays based on its CoANODE architecture and innovative bonding technology.
Raysolve says that its innovative large size GaN-on-Silicon wafer-level integration technology enables the production of high quality microLED chips with high yields.
In December 2021, Raysolve raised $10 million USD from Gaorong Capital along with Glory Ventures. In September 2022, the company raised another round $10 million from Source Code Capital, Gaorong Capital and Glory Ventures.
US-based Sundiode develops microLED microdisplays based on its stacked-RGB pixel structure.
In 2021, in collaboration with KOPTI and Jasper Display, Sundiode unveiled a microdisplay prototype that features 200 PPI and 100um pixels. The display is an array of stacked-RGB micro-LED pixels on a single chip bonded directly onto a Si CMOS backplane. In 2023 the company successfully grew a monolithic all-InGaN stacked-RGB LED structure.
