Autostereoscopic Display Viewpoint Correction for Parallax Alignment
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Solution Overview
Problem
Stereoscopic image display devices using a glasses-free method suffer from parallax images overlapping each other, leading to a diminished three-dimensional effect.
Innovation Solution
A display device with an optical member and a checking system that includes an optical path conversion unit, an optical characteristic detection unit, and an optical characteristic analysis unit to correct image data for each viewing viewpoint, minimizing optical characteristic differences across multiple viewpoints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a glasses-free method is used to display stereoscopic images, then the three-dimensional effect is enhanced, but the parallax images overlap each other
Solution Approach 1:
The patent applies parameter changes by measuring optical characteristics (luminance, light quantity) at multiple viewing viewpoints and using correction coefficients to adjust image data parameters. The display driving unit modifies brightness and positioning parameters for each viewpoint based on measured characteristics, preventing parallax image overlap while maintaining the three-dimensional effect.
Solution Approach 2:
The patent implements feedback by measuring optical characteristics at multiple viewpoints using photodetectors, comparing measured values to reference values, and generating correction coefficients that are fed back to the display driving unit. This closed-loop feedback system continuously adjusts image data to optimize viewing quality across different angles and prevent parallax image overlap.
2Manufacturing precision
If correction coefficients are applied for each viewing viewpoint, then image alignment is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the viewing area into multiple discrete viewpoints and measuring optical characteristics at each viewpoint separately. The display panel is divided into multiple pixel columns, each associated with specific viewpoints, allowing independent correction for each viewpoint. This segmentation enables precise image alignment without requiring a completely complex system redesign.
Solution Approach 2:
The patent implements self-service by enabling the display device to automatically measure its own optical characteristics at multiple viewpoints and generate correction coefficients without external intervention. The checking system integrates photodetectors and processing units that work autonomously to characterize and correct the display performance, reducing the need for external calibration equipment and simplifying the overall system.
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
Enhances the three-dimensional effect by aligning and correcting image data for each viewing viewpoint, reducing overlap and improving the stereoscopic image quality.
Implementation Method 1
an optical path conversion unit configured to modulate an optical path of a display image for each viewing viewpoint by reflecting the display image that is displayed on the display panel for each viewing viewpoint
Implementation Method 2
an optical characteristic detection unit configured to generate and output an optical characteristic detection signal by sequentially detecting optical characteristics of the display image for each viewing viewpoint
Data Source
AI summary
A display device includes: a display panel including a display area and a plurality of sub-pixels disposed in the display area; an optical member bonded onto the display panel; and a display driving unit configured to receive a correction coefficient for each viewing viewpoint of the display panel from a checking device of the display panel, to which the optical member is bonded, configured to correct image data for each viewing viewpoint using the correction coefficient for each viewing viewpoint, and configured to drive the display panel so that an image according to the corrected image data is displayed in the display area.