Taiwan team researches 3K x 3K +100° FOV light field display design to improve VR VAC problem

(Nweon September 21, 2023) Near-eye displays are becoming the future of portable devices, able to provide individuals with an immersive experience. However, the problem of visual vergence accommodation conflict is a huge challenge. The industry has been exploring related solutions. For example, researchers from Zhongqiang Optoelectronics and Innolux proposed using high-resolution light field liquid crystal display technology to improve virtual reality technology

A team composed of Zhongqiang Optoelectronics and Innolux proposed an improved light field VR display. It uses a 1411 PPI, 3.1-inch resolution ultra-high pixel density LCD display. By utilizing a 3K3K resolution display panel, this improved display expands the field of view (100 degrees) and provides a more immersive experience. Importantly, the researchers said it reduced visual vergence accommodation conflict.

According to reports, the research emphasizes the importance of using high-resolution liquid crystal displays to solve the problem of light field resolution, and improving LCD resolution, including aperture and contrast, through specialized pixel design and driving technology. Not only that, the prototype can be used for vision correction.

Researchers say that using light field technology can simultaneously correct vision and expand the field of view, thereby improving the overall virtual reality experience and enhancing user comfort

They studied the optical components of light field virtual reality and demonstrated the creation of elemental images through lens arrays and spatially multiplexed light field optics EI arrays. This method can generate volumetric 3D virtual images that accurately simulate appropriate eye accommodation, thereby reducing visual vergence accommodation conflicts.

In addition, the researchers highlighted the impressive resolution and pixel density of the LCD display developed by Innolux. By introducing a 15-degree tilt between panels, the associated components expand the field of view for both eyes, ensuring excellent angular resolution. At the same time, the modulation transfer function MTF across image fields guarantees faithful reproduction of high-quality images

At the same time, the team discussed visual correction issues in the field of light field VR. In summary, they introduced a graphical process based on light tracing to help correct myopia, hyperopia, and astigmatism. The process described takes into account parameters such as SPH, CYL and cylinder axis for comprehensive vision correction.

Related papers: Enhancing virtual reality with high-resolution light field liquid crystal display technology

In summary, the team introduced a comprehensive exploration of a 3K3K, high-resolution light field display with a field of view of 100 degrees. The researchers highlighted advances in circuit and driver design, proposed pixel architectures that improve image quality, demonstrated the advantages of light field technology in visual correction, and demonstrated the use of light field technology to expand the viewing window.

They further added: "This research makes a significant contribution to the development of light field displays and lays the foundation for the future development of high-resolution VR systems with enhanced visual experiences."

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