Exploring Micro LED Technology at Touch Taiwan 2024
From April 24 to 26, Touch Taiwan 2024 took place at the Nangang Exhibition Center in Taipei, highlighting the expanding use of Micro LED technology across multiple sectors, such as home theater, smart cockpits, retail, augmented reality, and wearables. The benefits of Micro LED technology include being thinner, lighter, brighter, more energy-efficient, and more compact. Key exhibitors featured at the event included Ennostar, AUO, ASMPT, Contrel, Aledia, PlayNitride, WG Tech, and Innolux.
Expanding Applications of Micro LED Technology
Due to continuous innovation by equipment manufacturers, material suppliers, panel makers, and brands, the Micro LED industry has successfully launched products like Samsung’s 89-inch Micro LED TV and Tag Heuer’s Micro LED watch. Additionally, companies like Samsung, AUO, Leyard, Unilumin, and Lenovo showcased transparent Micro LED displays, indicating a potential shift toward this technology as the next major trend in display innovation.
Micro LED in Automotive and Display Solutions
Research by TrendForce suggests that Micro LED technology could soon be utilized in vehicle components, including knobs, transparent car windows, and heads-up displays (HUDs). With its high brightness, contrast, wide color gamut, and fast response times, Micro LED is well-suited for smart cockpit displays, including irregular, curved, and flexible screens with tactile feedback, enhancing the driving experience.
Ennostar‘s Advances in Micro LED Technology
Ennostar is advancing innovation with a focus on automotive lighting, advanced displays, and smart sensing.
This year, the company made a breakthrough with its Monolithic Array Chip (MAC) technology, integrating RGB into a single chip measuring 23×23µm. This simplifies the manufacturing process, accelerates production timelines, and improves the efficiency of red light in small-scale displays. Ennostar also addressed the voltage differences between red, blue, and green lights and showcased its vertical RGB Micro LED chips in a 4-in-1 package, alongside 8-inch Micro LED technology (GaN on Si).
In automotive lighting, Ennostar’s matrix LED headlights feature single-LED control, preventing direct light on pedestrians while enabling the projection of images or text for safer driving. The LED D65 ambient lighting system ensures consistent color accuracy in various environments through its red, green, and blue temperature compensation capabilities.
In Mini LED automotive displays, Ennostar’s subsidiaries, Epistar and Lextar, have successfully supplied 2016/3030 LEDs to European, American, and Chinese automakers. The 3030 LED, in particular, features a transparent frame and white resin coating, achieving a 160° light-emitting angle. As automotive displays become thinner, Ennostar is also developing 1010/CSP and 1515 LEDs for potential inclusion in 2026-2027 models.
For infrared sensing, Ennostar provides SWIR LEDs and InGaAs photodiodes for true wireless stereo (TWS) earphones, along with the world’s smallest integrated PPG sensor module (SiP) that measures heart rate, blood oxygen, and temperature. Ennostar also showcased smart optical sensing solutions for smartwatches, rings, and the increasingly discussed SWIR optical glucose measurement technology.
AUO‘s Micro LED Innovations
AUO presented a comprehensive range of Micro/Mini LED smart cockpit solutions, including a 52-inch full-vehicle Mini LED display, Micro LED knobs, transparent car window displays, and a panoramic heads-up display (P-HUD). The company’s innovations also extend to foldable Micro LED displays for rear-seat entertainment and an in-display camera that enables direct eye contact during video calls without affecting the display quality.
AUO also demonstrated the world’s largest 31-inch single-piece Micro LED display, overcoming challenges in production yield with its advanced driving technology. Additionally, the company introduced a 30-inch naked-eye 3D Micro LED dual-layer display, featuring high transparency, brightness, and fast response times, providing an immersive 3D experience for multiple viewers without restrictions on viewing distance or angle.
ASMPT‘s Contribution to Micro LED Manufacturing
ASMPT has responded to the Micro LED market demand with its Stamp Transfer/Bonding equipment (AD300Pro) and laser transfer equipment (LT300Pro). The output rate depends on the chip size, carrier size, and adhesive materials. ASMPT’s equipment is particularly suited for applications like Micro LED watches, automotive displays, and adaptive headlights, with successful shipments to international clients. Its LT300Pro laser transfer equipment achieves ±2μm precision and a production speed of 5KK with a refill capability.
Contrel‘s Innovations in Micro LED Production
Contrel has made significant strides in Micro LED manufacturing with its Laser Induced Transfer Bonding (LITB) technology, which won the Gold Panel Award at Touch Taiwan. This equipment integrates mass transfer and bonding repair functions into one machine, simplifying production by eliminating the need for soldering materials or additional heating equipment. Contrel’s equipment boasts alignment accuracy of ±1.5μm, surpassing the industry average. Its Smart & Selective Mass Repair (SSMR) technology can enhance yield rates to 99.999%, significantly reducing rework and saving materials and energy.
Aledia‘s New Products and Achievements
Aledia showcased three new products at Touch Taiwan 2024. The company achieved a breakthrough in 3D nanowire LED technology, with blue Micro LEDs reaching an external quantum efficiency (EQE) of 32%. Its 160×160µm 2D LEDs are designed for backlighting applications, while its 3D nanowire RGB LEDs integrate red, green, and blue into a single chip, eliminating the need for mass transfer and addressing the technical challenges faced by current Micro LED displays.
PlayNitride‘s Showcases at Touch Taiwan
PlayNitride displayed Samsung’s 89-inch Micro LED TV, highlighting the superior qualities of Micro LED technology, including wider viewing angles, higher brightness, and improved contrast and reliability.
In the AR glasses section, PlayNitride presented a 0.49-inch full-color Micro LED microdisplay, which has shown significant growth through collaborations with optical partners, reducing costs and improving specifications.
WG Tech‘s Innovative Displays
WG Tech showcased its 65-inch Mini LED TV with 0 OD glass-based backlight technology, offering high energy efficiency, easy heat dissipation, and OLED-level light efficiency while maintaining a cool screen temperature.
The company also introduced Through-Glass Via (TGV) technology, a breakthrough in Mini LED displays, which supports ultra-fine circuits and meets current demands for Micro/Mini LED displays.
Innolux‘s Micro LED Splicing Display
Innolux’s 187-inch Micro LED splicing display offers cinema-grade color saturation, exceptional contrast, and a frameless design. It won the Gold Panel Award for its advanced display components and active driving technology, which use quantum dot color conversion to deliver superior image quality across diverse settings.
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