Stacked Light-Field Display Surfaces to Reduce Vergence Conflict
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Solution Overview
Problem
Existing stereoscopic image display devices cause vergence accommodation conflict (VAC), leading to 3D sickness, eye strain, and headache, limiting user age and usage time due to fixed focus adjustment and decreased light transmittance across stacked display surfaces.
Innovation Solution
A stereoscopic image display device with multiple display surfaces, including at least one surface with higher light transmittance than others, and an image generation unit that generates a light field image to correct for eyepiece magnification and aberration, allowing continuous depth representation and increased light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple display surfaces are stacked to enable light field image display, then depth perception is improved, but light transmittance decreases causing visibility deterioration
Solution Approach 1:
The display system is segmented into multiple independent display surfaces (first display surface and second display surface) stacked at different depths. Each surface displays a portion of the light field image, with the first surface having higher transmittance and the second surface providing additional depth information. This segmentation allows the system to maintain good visibility through the high-transmittance first surface while still achieving depth perception through the combined light field effect of multiple surfaces.
2Device complexity
If focus adjustment is fixed on display surface to simplify structure, then device complexity is reduced, but vergence accommodation conflict occurs causing eye strain
Solution Approach 1:
The patent transitions from a single 2D display surface to a 3D stacked configuration with multiple display surfaces at different depths along the optical axis. This dimensional change enables the light field image to provide continuous depth information, allowing the user's eyes to naturally accommodate to different depths without requiring complex mechanical focus adjustment mechanisms, thereby resolving the vergence accommodation conflict.
3Illumination intensity
If high transmittance display surface is used to improve visibility, then light transmittance is improved, but image resolution may be compromised
Solution Approach 1:
The display function is segmented across multiple surfaces with different transmittance characteristics. The first display surface uses a high-transmittance panel for the main visual content, while the second display surface can use a lower-transmittance panel for additional depth layer information. This segmentation allows each surface to be optimized for its specific function, maintaining overall image resolution while ensuring good visibility through the high-transmittance first surface.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Suppresses vergence accommodation conflict, enhances visibility, and reduces device size and weight by increasing light transmittance and correcting for optical aberrations, enabling longer usage times and improved image clarity.
Implementation Method 1
at least one second display surface having a higher light transmittance than the first display surface
Data Source
AI summary
An object of the present invention is to provide a stereoscopic image display device and a stereoscopic image display method of suppressing vergence accommodation conflict. The stereoscopic image display device of the present includes an image generation unit that generates a light field image at a predetermined viewpoint position; and an image display unit that displays an image having a depth in each of both eyes of a user on the basis of the light field image, in which the image display unit has a plurality of stacked display surfaces, and the plurality of display surfaces includes at least one first display surface and at least one second display surface having a higher light transmittance than the first display surface.