VR Display Micro Deflector Reduces Screen Door Effect
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Solution Overview
Problem
Current virtual reality (VR) displays suffer from low-quality visual reality and stereoscopic properties, leading to user fatigue and the 'screen door effect' due to suboptimal pixel area ratios and scattering of light, which reduces immersion and realism.
Innovation Solution
A VR display design featuring a micro deflector that redirects scattered light from non-emission areas to the normal direction, enhancing the observed emission area and reducing the non-emission area, thereby increasing the effective pixel area ratio and minimizing the screen door effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the pixel area ratio is increased to improve visual quality, then the emission area is enlarged, but the non-emission area structures (transistors, wiring) require more space, creating a conflict in area allocation
Solution Approach 1:
The patent introduces a temporal dimension by controlling the emission timing of different pixel regions. The emission area is divided into first emission areas and second emission areas that emit at different times, allowing the non-emission area structures to be shared or minimized across time periods, thus resolving the spatial conflict between emission and non-emission areas
Solution Approach 2:
The patent implements dynamic control of emission areas through sequential activation of first and second emission areas. This dynamic approach allows the display to achieve high effective emission area ratios while maintaining necessary non-emission area structures, as not all pixels need to emit simultaneously
2Ease of manufacture
If light scattering in non-emission areas is allowed, then the device structure is simpler, but the screen door effect occurs reducing immersion quality
Solution Approach 1:
The patent converts the harmful light scattering effect into a beneficial one by using the scattered light from non-emission areas as a light source for the second emission area. The non-emission area structures that would normally block light are instead used to guide and utilize scattered light, eliminating the screen door effect while maintaining structural simplicity
Solution Approach 2:
The patent introduces a light guide layer as an intermediary between the non-emission area structures and the second emission area. This intermediary captures scattered light from the non-emission areas and redirects it to illuminate the second emission area, converting what would be a visual defect into a functional lighting mechanism
3Area of stationary object
If the display is placed closer to the user's eye to improve immersion, then the field of view is enhanced, but the screen door effect becomes more noticeable
Solution Approach 1:
The patent ensures continuous light emission by utilizing scattered light from non-emission areas to supplement the second emission area. This continuous lighting approach maintains high brightness and reduces the perception of gaps or screen door effects even when the display is positioned close to the user's eye for enhanced field of view
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
This design improves the three-dimensional quality and immersion by maximizing the emission area ratio in the observed image, reducing user fatigue and enhancing the sense of realism and immersion in VR experiences.
Implementation Method 1
Some lights radiated from the emission area are scattered in the non-emission area
Implementation Method 2
The micro-deflector reflects or deflects the lights to the front direction
Data Source
AI summary
The present disclosure relates to a display for a personal immersion apparatus for embodying the virtual reality or the augmented reality. The present disclosure suggests a display for a personal immersion apparatus comprising: a display panel; and an imaging lens; wherein the display panel includes: a plurality of pixel areas disposed on a substrate; an emission area defined in the each pixel area; a non-emission area surrounding the emission area in the each pixel area; and a micro deflector configured to deflect lights scattered over the non-emission area from the emission area to a normal direction with respect to a surface of the substrate, and to provide the deflected lights to the imaging lens, and wherein the imaging lens is disposed apart from the display panel with a focal length of the imaging lens.