Dr. Min Lu Profile

Dr. Min Lu

at Shenzhen Yinglun Technology Co., Ltd.

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Proceedings Article | 24 November 2021 Paper

A flat panel light field 3D display with high resolution for a single user

Jia Jia, Jianghui Kang, Yiying Pu, Min Lu, Baolin Tan

Proceedings Volume 12066, 120661J (2021) https://doi.org/10.1117/12.2607079

KEYWORDS: Head and helmet tracking, 3D displays, Image quality, 3D image processing, Cameras, Optical resolution, Geometrical optics

Read Abstract +

Light field display is a true three-dimensional (3D) display technology that can produce full depth cues without using any special glasses. A super multi-view display (SMV) technology is one kind of a promising method to realize the light field display, in which a large number of views with an interval smaller than the pupil diameter was produced so that two or more rays passing through one object point in a 3D space enter the pupil simultaneously. Therefore, a viewer could be able to focus on that object point. However, the main bottleneck of its commercialization is the low 3D image resolution with a small field of view, shallow depth, and et. cl. which are limited by the bandwidth of the display devices. To solve this problem, an SMV system with the slanted lenticular lens array attached to a flat panel display was developed in this article. To produce a light field display with a high resolution while maintaining two or three rays entering the pupil, an eye-tracking system is applied. The viewing zone is generated only around the viewer's eyes. The resolution is improved by the reduction of the viewing zone. The crosstalk caused by the manufacture is another issue that affects the 3D image quality. The optical model is developed to simulate the optical characteristics of light field display based on the raytracing considering the fabrication error. The calibration method is proposed to compensate for the error and improve the image quality further.

Proceedings Article | 24 November 2021 Paper

Dynamical characterization of viewing zone in a super multi-view 3D display based on eye-tracking

Jia Jia, Jianghui Kang, Yiying Pu, Min Lu, Baolin Tan

Proceedings Volume 12066, 1206617 (2021) https://doi.org/10.1117/12.2606357

KEYWORDS: 3D displays, Lenticular lenses, LCDs, Cameras, Lens design, Image quality, 3D image processing, Optical resolution, Head and helmet tracking

Read Abstract +

A super multi-view display (SMV) technology is one kind of a promising method to realize the light field display approximately. It generates a dense viewing points with an interval smaller than the pupil diameter so that two or more rays passing through one object point in a three-dimensional (3D) space enter the pupil simultaneously. Therefore, a viewer could be able to focus on that object point. To produce a light field display with high 3D resolution while maintaining two or three rays entering the pupil, a flat panel system with high resolution or multiple display devices are required. To solve this problem, an SMV system with the slanted lenticular lens attached to a liquid crystal display (LCD) was developed in this article. The viewing zone is generated only around the viewer's eyes. Therefore, the resolution is improved by the reduction of the viewing zone. However, the viewing freedom is limited not only in the horizontal and vertical direction but also in the longitudinal direction. To increase the viewing freedom, an eye-tracking system is applied to the developed SMV system. The dynamical viewing zone characterizations including viewing interval, spatial distribution, and et. cl in this system was analyzed. To keep the viewer’s eyes always in the viewing zone with the smaller crosstalk, the compensation factors were calculated to generate the viewing zone depending on the 3D positions of the viewer’s eyes. The results show that the proposed SMV system successfully increased the horizontal, vertical, and longitudinal viewing freedom.

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