News: LEDs
4 May 2022
Porotech demonstrating tunable-colour DynamicPixelTuning technology
At the Society for Information Display (SID) Display Week 2022 event at the San Jose Convention Center, CA, USA (10-12 May), Porotech (a spin off from the Cambridge Centre for Gallium Nitride at the UK’s University of Cambridge that has developed porous GaN material) is unveiling DynamicPixelTuning on its PoroGaN micro-display platform. This makes it possible to create full-color or tunable-colour displays using identical pixels from a single wafer – achieving color uniformity while eliminating complex fabrication processes.
The firm reckons that the development can accelerate the commercialization of micro-LEDs, mini-LEDs and LEDs to deliver display products for augmented/mixed/virtual reality (AR/MR/VR) applications, smart wearable devices, smart displays and large-scale direct-view displays.
Porotech claims to be first to unlock dynamic color tuning of LED chips and pixels, with its PoroGaN platform making it possible for each individual LED on an epiwafer to emit all colors of the visible spectrum.
At this stage, the Porotech proof-of-concept displays are tunable mono-color, with uniform brightness and color for display products in the micro (µm) and nano (nm) pixel space. But the company’s proprietary PoroGaN platform and Dynamic Pixel technology are paving the way to a monolithic full-color RGB display very soon.
Picture: Porotech’s display demonstrating its tunable-color DynamicPixelTuning technology.
The PoroGaN platform also enables a one-step wafer-to-wafer bonding process – removing key manufacturing barriers for full and tunable color micro-display fabrication, increasing yields and reducing production costs and time to market.
“PoroGaN’s wavelength-agnostic optoelectronic properties also simplify electronic and optoelectronic system design integration,” says CEO & co-founder Dr Tongtong Zhu.
Micro-LED and mini-LED display fabrication remains challenging due to the multi-phase processes currently required to manipulate elements at the micro- and nano-scale. “With Porotech’s porous GaN technology and scalable architectures, the PoroGaN platform significantly simplifies the mass-transfer or pick-and-place process,” says Zhu.
“In the case of micro-displays, it eliminates the need for transfer by allowing wafer-scale bonding of epiwafer to backplane in a single step,” he adds. “The simplification of the process delivers high-efficiency and high-yield solutions, leapfrogging full-color micro-LED and mini-LED displays as viable mass-market products for next-generation display applications.”
The PoroGaN platform is configurable to LED epiwafers for both micro-LED and mini-LED chip processing. Other configurations include chip-on-wafer, chip-on-tape and tunable material platforms.
At Display Week, Porotech is demonstrating its technology at stand R23 in the I-Zone section. Zhu is also among the speakers at the event’s Business Conference on 9 May.
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