Efficient and high-performance display screens depend on the integration of various functional components. With consumer electronics demanding lighter designs, superior image quality, and better interactivity, the integration of screen functionalities is continually evolving. At the SID Technology Forum, technical experts from Visionox held in-depth discussions on innovations in integrated touch control.

Design of Touch-Control and Electromagnetic Sensors Integrated Into Flexible OLED Displays

The electromagnetic resonance (EMR) pen interacts with an electromagnetic induction sensor embedded within the display module using its unique electromagnetic induction principle. This technology provides users with an experience akin to writing on paper, making it particularly suitable for professional illustrators, as the pen’s fine tip enables precise detailing. Additionally, being a passive pen, it eliminates the need for battery charging, thus increasing its convenience and durability.

In contrast to conventional designs where the EMR sensor is set separately on the back of the display module, Visionox’s approach integrates capacitive touch and EMR sensors directly onto the screen. This design notably reduces module thickness, making it easier to fold the display module. By using unique pattern designs, Visionox minimizes the number of MASKs required, thereby reducing costs. Furthermore, these pattern designs reduce the load on the touch electrodes and the resistance of the EMR coils. Through a unique driving solution, interference between touch and EMR driving is effectively avoided.

Currently, Visionox has successfully achieved both finger touch and passive EMR pen point-reporting and ruling functions.

Research on Innovation of Full-Screen Facial Recognition Technology

With advancements in technology, the application of facial recognition in privacy and security has expanded. Infrared technology, due to its ability to capture invisible thermal radiation, maintains highly accurate recognition performance even under varying lighting conditions. However, infrared light used in facial recognition can cause flickering on the screen.

Through a detailed analysis of the adverse effects of infrared light on OLED screens—particularly its impact on TFTs—Visionox conducted a thorough examination of the screen flicker issues caused by infrared light in under-screen facial recognition. The company proposed innovative solutions for TFT protection structures, achieving a seamless integration of full-screen displays with infrared facial recognition technology, thereby realizing a truly comprehensive full-screen experience.

Visionox has now completed the technical preparations and validated these solutions across various applications.