AR Display Polarization Switch for Blur Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current augmented reality (AR) technologies face challenges in preventing the addition of real-world light to virtual objects and reducing blur effects caused by masking real-world light, which affect the immersion and clarity of AR images.
Innovation Solution
A device and method that alternately display images using a display with polarizers and a polarization switch to control the direction of polarized light, predicting and correcting blur effects based on user parameters, and performing deconvolution to enhance image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mask is used to block real-world light at the object position, then virtual objects can be clearly displayed, but a blur phenomenon occurs in the mask area
Solution Approach 1:
The system alternates between displaying the first image (with virtual object) and the second image (with mask) at different time periods. During the first image display period, polarized light is transmitted; during the second image display period, polarized light is blocked. This temporal separation allows the mask to be invisible when not needed while providing clear occlusion when required, eliminating the persistent blur effect.
Solution Approach 2:
The polarization state of the display is dynamically switched between two states: transmitting polarized light and blocking polarized light. This dynamic control allows the system to adapt the mask's visibility in real-time, making the mask effectively invisible during virtual object display while providing sharp occlusion during light blocking periods, thus resolving the blur issue.
2Reliability
If real-world light is blocked to improve virtual object visibility, then immersion is improved, but the mask itself becomes blurred
Solution Approach 1:
The system implements periodic switching between two display modes: one where the mask is active (blocking light) and one where it is inactive (transmitting light). This periodic action ensures that the mask boundary remains sharp during blocking periods while being invisible during transmission periods, maintaining both immersion and sharpness.
Solution Approach 2:
The system performs preliminary processing on the second image (mask image) to predict and offset blur effects before display. By pre-correcting the mask image based on predicted blur values, the system ensures that when the mask is displayed, it appears sharp and well-defined, thus maintaining both immersion and boundary sharpness.
3Reliability
If the display alternates between showing virtual objects and masks, then real-world light addition is prevented, but image stability is reduced
Solution Approach 1:
The system uses periodic alternation between displaying virtual objects and masks with synchronized polarization switching. This rapid periodic switching creates a stable perceived image because the human eye integrates the alternating frames, preventing the perception of flicker or instability while effectively preventing real-world light from being added to virtual objects.
Solution Approach 2:
The system synchronizes the polarization switching with the image display timing, creating a feedback loop where the polarization state responds to the current displayed image content. This synchronization ensures that light blocking occurs precisely when the mask is displayed and light transmission occurs when the virtual object is displayed, maintaining image stability while preventing light contamination.
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
The solution effectively prevents real-world light from being added to virtual objects and reduces blur, improving the realism and clarity of AR images by synchronizing polarized light direction and performing preprocessing to offset blur effects.
Implementation Method 1
a polarization switch configured alternately polarize the light incident on the display at a switching period determined based on the time period
Data Source
AI summary
A device and method for providing an augmented reality (AR) image are provided. The device includes a display configured to alternately display a first image including an object at an object position and a second image including a mask for blocking transmission of light incident on the display at the object position; a processor configured to determine a time period and control the display to alternately display the first image and the second image during the time period; and a polarization switch configured alternately polarize the light incident on the display at a switching period determined based on the time period.