Quantum dots, known for offering the highest color fidelity among display materials to date, are rapidly advancing in direct-view display applications. Leveraging its exclusive Nanopore Quantum Dot (NPQD®) patented technology, Saphlux has achieved in-situ integration of MLED chips and quantum dots, and has taken the lead in successfully commercializing this technology in red quantum dot chips. These have already been deployed at scale in QD-COB direct-view display products, covering thousands of square meters.

Recently, Saphlux has also introduced quantum dot MLED products in custom wavelengths such as yellow and green, breaking through the limitations of traditional red, green, and blue chips, and ushering the industry into a new era of tunable chip colors.

Figure 1. Real Images of Quantum Dot Green, Yellow, and Red MLED Chips

Figure 2. Wavelength Modulation Range of Quantum Dot MLED Chips

QD Green Chips: Enhancing Uniformity and Pushing to Rec.2020 Standard
The blue-light-excited quantum dot green chip is set to enter mass production soon. The QD green chip delivers highly uniform wavelength control—within ±1 nm across a 4-inch wafer—providing a significant advantage in full-screen color consistency. As green QD materials continue to improve, the chip shows strong potential to fully cover the green point of the Rec. 2020 color gamut. Currently, the 0307-sized QD green chip has passed comprehensive reliability validation in high-end COB samples with a pixel pitch of P0.7 and below, and is scheduled for market launch in the second half of the year.

Figure 3. Comparison of Uniformity Between InGaN Green and QD Green Chips

QD Yellow Chips: Master in Portrait--for Virtual Production and High-End Design
Saphlux has completed sample delivery of its 580 nm wavelength yellow quantum dot MLED chip, achieving an external quantum efficiency over 8%. By integrating this chip alongside traditional RGB chips, an RGB+Y four-color pixel structure is formed. This structure is specifically designed for applications with high demands on skin tone accuracy and image fidelity—such as high-end virtual production displays, professional studios, and design scenarios. It significantly enhances portrait detail and substantially improves overall display quality.

Figure 4. Color Gamut Comparison Between RGB+Y Four-Color Pixel Structure and DCI-P3 Standard

Figure 5. Comparison Between RGB+Y Four-Color Display and Conventional Display

RGB-in-One Chips: Single-Chip Full Color for the Ultimate Cost-Effective Solution
In pursuit of higher integration, Saphlux is actively developing its “RGB in One” three-in-one chip technology. This approach integrates red and green quantum dot materials onto a single blue MicroLED chip, enabling RGB pixel emission from a single chip. The solution significantly simplifies chip transfer and die bonding processes, reducing equipment investment, rework and repair costs, and transfer costs by approximately 60%. It also greatly enhances pixel uniformity and overall display stability, offering a new approach for high-precision MicroLED displays.

Figure 6. Real Image of Saphlux’s “RGB in One” Chip Wafer (Partial View)

QD Red Chips: Eco-Friendly and Color-Stable — A Game-Changing Solution for High-End Large Displays and CAVE Systems
Saphlux’s mass-produced R-series red chips adopt a quantum dot color conversion approach, offering more precise color point, narrower FWHM, and superior stability under varying temperatures and currents compared to conventional AlInGaP red chips. In COB packaging, the use of a consistent substrate for red, green, and blue chips ensures virtually no color shift under large viewing angles.

Figure 7. Key Advantages of Quantum Dot Red Chips

Data shows that under the same packaging configuration, QD-COB displays exhibit over 15 times less color temperature variation at a maximum viewing angle of 85° compared to conventional COB displays. In high-end immersive environments such as CAVE systems, color deviation at a 60° side viewing angle decreases from 15% (traditional) to less than 3%, enhancing color accuracy by more than fivefold and significantly improving the immersive viewing experience.

Video 1. NPQD® QD-COB CAVE vs. Conventional COB CAVE

Saphlux’s QD-COB display products have been adopted in both traditional and emerging high-end commercial display applications. Beyond this, they are also helping to overcome longstanding technical barriers across broader display use cases. Recently, Saphlux supported a customer’s seamless LCD solution using QD-COB technology. The wide viewing angle and high color accuracy of QD-COB perfectly complement the ultra-wide viewing characteristics of LCD panels, allowing it to act as a seam-filling component that eliminates the black gaps between LCD units. This solution breaks through traditional LCD size limitations, delivering a balance between immersive visual experience and cost efficiency.

Figure 8. QD-COB as a Seamless Connector in Large-Format LCD Display Solutions

Dr. Jie Song, Vice President of Technology at Saphlux, stated: “The unique nanopore structure provides a stable and efficient encapsulation environment for quantum dots, significantly enhancing luminous efficacy and chip reliability. Saphlux has now established a mature and efficient mass production system for quantum dot MLED chips. With ongoing breakthroughs in quantum dot material technology, we will continue to introduce chips with more wavelength options. We are confident in working with industry partners to jointly develop more high-quality quantum dot direct-view display products.”

Mr. Changjun Lu, Chief Technology Officer of Leyard Group and a partner of Saphlux, commented: “Over the past year, QD-COB display products have delivered outstanding performance in the end market. This year, Leyard has launched the new MG NPQD® Cold Screen series, featuring further optimizations in chip packaging and system design. Through close collaboration with Saphlux, we are bringing renewed momentum to the COB commercial display market. Looking ahead, Leyard aims to accelerate the adoption of more products powered by multi-wavelength and three-in-one quantum dot chips, expanding our portfolio of differentiated fine-pitch direct-view displays.”