3D Display Crosstalk Correction Using Eye Tracking
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Solution Overview
Problem
Three-dimensional display devices suffer from issues such as blur and ghosting due to imperfect light-splitting units and light-emitting units, which result in suboptimal collimation and mismatching, leading to degraded image quality.
Innovation Solution
Incorporating an eye tracking device to provide left and right eye image data, a first processing unit to calculate viewpoint coordinates, and a second processing unit to define a crosstalk region based on light beam paths and angles, followed by gray level adjustments to correct image data, thereby improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light-splitting units and light-emitting units are used in three-dimensional display device, then three-dimensional image can be generated, but blur and ghosting appear in the image
Solution Approach 1:
The patent applies preliminary action by pre-calculating viewpoint coordinates based on eye tracking data and pre-defining crosstalk regions before image display. The system determines gray level correction values in advance for each light beam, allowing proactive compensation for crosstalk effects rather than reactive correction, thereby improving image quality before the harmful effects manifest
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting gray levels of light beams based on their spatial relationships and crosstalk potential. The system modifies intensity parameters of individual light beams within the crosstalk region to compensate for overlapping effects, transforming the fixed gray level parameters into adaptive variables that respond to real-time eye position and viewing conditions
2Measurement precision
If gray level correction is applied to reduce crosstalk, then image clarity improves, but processing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the light beam field into distinct crosstalk regions and non-crosstalk regions. Each region receives differentiated processing - only light beams within identified crosstalk regions undergo gray level correction, while other beams maintain original parameters. This segmented approach reduces overall processing complexity by limiting correction operations to specific spatial zones rather than applying global processing
Solution Approach 2:
The patent implements feedback by using eye tracking device data to continuously monitor viewer position and dynamically adjusting gray level corrections accordingly. The system creates a closed-loop control where eye position feedback informs viewpoint calculation, which in turn determines crosstalk region definition and gray level adjustment parameters, optimizing image clarity adaptively without requiring complex manual calibration
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 reduces crosstalk and enhances image clarity by adjusting gray levels, resulting in improved three-dimensional image quality without ghosting or blur.
Implementation Method 1
a plurality of light-splitting units for distributing the light beams to the left viewpoint and the right viewpoint
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A three-dimensional display device (1) includes an eye tracking device, a display (12), and first and second processing units. The first processing unit calculates coordinates (CL, CR) of left and right viewpoints (VPL, VPR) based on left and right eye image data. The display (12) includes light-emitting units (120) for emitting light beams (B) and light-splitting units (121) for distributing the light beams (B) to the left and right viewpoints (VPL, VPR). The second processing unit defines a crosstalk region (XT) based on an opening angle (θ) and optical paths of the light beams (B) passing through the light-splitting units (121). The crosstalk region (XT) is simultaneously struck by a first light beam (BL) assigned to the left viewpoint (VPL) and a second light beam (BR) assigned to the right viewpoint (VPR).