On June 28th, Mojo Vision, a leader in high-performance Micro LED technology, announced the development of the world’s highest-density red Micro LED microdisplay, boasting an impressive 14,000 PPI resolution using quantum dot technology. This achievement marks a critical milestone in the company’s efforts to overcome the manufacturing challenges associated with producing reliable, high-performance, full-color Micro LED displays.
Red Micro LED Microdisplay: A New Standard
Unlike previous high-density green Micro LED displays, Mojo Vision’s newly developed red Micro LED utilizes their proprietary quantum dot (QD) process. The microdisplay features Micro LED chips with a diameter of 1.37 micrometers and a 1.87 micrometer gap between adjacent chips. The high-brightness red light emitted by these chips is exceptionally pure, enhancing display performance and user experience. According to the company, this level of resolution, efficiency, and visual quality is essential to meet the increasing demands of the augmented reality (AR) and extended reality (XR) markets.
Addressing Display Technology Challenges
Industry experts recognize the challenges faced by display technologies like Micro OLED, often used in AR/VR headsets, in adapting to various lighting environments. As ambient lighting conditions change, displays must have a wide dynamic range to maintain optimal brightness and contrast. High-quality commercial Micro LED microdisplays provide robust capabilities for emerging AR and XR applications, functioning effectively in all lighting conditions, from bright daylight to dark rooms. Mojo Vision’s high pixel-density red Micro LED, enhanced by quantum dot technology, is the first to combine ultra-high pixel density, brightness, contrast, color gamut, and efficiency while overcoming wavelength and visual challenges.
Achieving True Color Micro LED Displays
“The ability to manufacture very small red, green, and blue Micro LED chips on the same substrate is vital for achieving vivid and efficient full-color microdisplays,” said Dr. Nikhil Balram, CEO of Mojo Vision. “We can now create true red microdisplays at this pixel density and optical specification—unlike the orange light of other microdisplays—bringing us closer to developing Micro LED microdisplays that meet or exceed the performance and form factor requirements of today’s AR and XR products.”
While many suppliers can produce high-quality Micro LED microdisplays with larger chip sizes (greater than 5 micrometers), the industry is being pushed to solve the design and development challenges of smaller Micro LEDs, particularly those using color conversion materials. Mojo Vision’s breakthrough in this area sets a new standard for Micro LED microdisplay manufacturers. Their display, with an unprecedentedly small pixel pitch, emits true red light, surpassing the primary color standards commonly required for broadcast and consumer-grade displays, typically demanding a wavelength of 620 nanometers for red light.
Overcoming the Barriers to Full-Color Micro LED Displays
“Three major bottlenecks—wearability, visual performance, and sociability—are critical for the widespread adoption of AR/VR in the consumer market,” stated Dr. Bernard Kress, Chairman of the International Society for Optics and Photonics (SPIE). “Here, the display subsystem is at the core of this issue. Emissive display panels, like Micro LED, are favored over traditional silicon-based displays because they operate without requiring bulky volumes and high power. While Micro OLED panels pair well with larger volume birdbath combiners, their ultra-high brightness makes them more suited to ultra-thin waveguide combiners.”
“For years, single-chip RGB Micro LED microdisplays have been the industry’s ‘holy grail.’ However, to date, manufacturers have struggled to produce high-efficiency Micro LED pixels with less than 4-micrometer spacing. Challenges include using InGaN over the more established AlInGap, managing red light efficiency, ensuring reliability, addressing thermal issues, and overcoming the industry’s lack of 300mm wafer fabrication facilities,” continued Dr. Kress. “Now, Mojo Vision’s proprietary red and green quantum dot conversion materials, combined with their existing blue GaN Micro LED panel technology, can achieve a pixel pitch of less than 2 micrometers, offering a viable solution for current smart glasses in the market.”
Supporting the Future of Smart Glasses
According to Mojo Vision, their new red Micro LED display prototype will support the development of more advanced, lightweight smart glasses. The company recently announced a partnership with DigiLens to enhance its display capabilities in the AR/XR market. This collaboration follows Mojo Vision’s successful development of the first silicon-based blue GaN Micro LED wafer on a 300mm platform.
“In the coming years, full-color Micro LED microdisplays will gradually become available in the market,” said Dr. Guillaume Chansin, Director of Display Research at Display Supply Chain Consultants (DSCC). “Mojo Vision’s prototype of the ultra-high-density red Micro LED display, based on quantum dot technology, represents a new milestone, demonstrating the feasibility of sub-2-micrometer pixel pitch with red conversion. This technological advancement is pivotal for the further growth of the Micro LED industry, showcasing Mojo Vision’s potential to achieve full-color, high-resolution microdisplays.”
About Mojo Vision
Mojo Vision, headquartered in Saratoga, California, is an invisible computing company committed to reshaping how users think and interact with information. Mojo envisions a future where information and knowledge are seamlessly available to users without the need for traditional devices, freeing them from being tethered to technology in their daily lives. Mojo is inventing the future of computing—Invisible Computing—enabling users to connect more meaningfully and confidently.
To fulfill its vision and commitment to the Micro LED display field, Mojo Vision combines breakthrough technologies, industry-leading display and semiconductor expertise, and advanced 300mm manufacturing processes. Additionally, Mojo’s proprietary quantum dot technology brings full-color display advantages to its platform, meeting customer demands for superior performance in various applications. Leveraging these innovations, Mojo Vision has developed the world’s smallest and highest-density dynamic display for its first AR smart contact lens, aiming to disrupt the $160 billion display industry.
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