Abstract
Conventional head-mounted displays present different images to each eye, and thereby create three-dimensional (3D) sensation for viewers. This method can only control the stimulus to vergence but not accommodation, which is located at the apparent location of the physical displays. The disrupted coupling between vergence and accommodation could cause considerable visual discomfort. To address this problem, in this paper a novel multi-focal plane 3D display system is proposed. A stack of switchable liquid crystal Pancharatnam-Berry phase lenses is implemented to create real depths for each eye, which is able to provide approximate focus cue and relieve the discomfort from vergence-accommodation conflict. The proposed multi-focal plane generation method has great potential for both virtual reality and augmented reality applications, where correct focus cue is highly desirable.
Highlights
Head-mounted display is a key part of virtual reality (VR) and augmented reality (AR) devices, serving as a bridge connecting the computer-generated virtual world and the real one
With the factorized light fields, a high-resolution 3D scene is synthesized by a compact light field near-eye display system
The 7P + 9th row in the mapping matrix M, corresponding to the 9th pixel in the 3D scene looked from view point 8, are zeros except for the 8th and P + 7th columns, representing the locations of pixels to be added in two virtual panels
Summary
Head-mounted display is a key part of virtual reality (VR) and augmented reality (AR) devices, serving as a bridge connecting the computer-generated virtual world and the real one. Providing different images to different eyes is a popular and effective method to create acceptable depth perceptions, this unnatural method has considerable drawbacks, such as vergence accommodation conflict [3], distorted depth perception [4], and visual fatigue [5] To overcome these drawbacks, physically real depths must be provided by the display in order to present the correct vergence and the corresponding accommodation. There exist different kinds of technologies with such potential, including volumetric displays [6], integral displays [7,8], light field displays [9,10,11], and focal surface displays [12] In most of these methods, a fast focal length changing device plays a key role for the multi-focal plane displays. With the factorized light fields, a high-resolution 3D scene is synthesized by a compact light field near-eye display system
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