Autostereoscopic Display Head Roll Compensation
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Solution Overview
Problem
Conventional 3D displays experience image distortion, loss of depth sensation, and viewer discomfort when viewed from non-vertical positions or oblique angles, due to their design assuming a vertical upright viewer position.
Innovation Solution
A sensor-equipped display system that detects viewer head roll and oblique angles, adjusting 3D images by applying keystone distortion to maintain depth perception and prevent image crosstalk and eyestrain, using an optical layer like a lenticular array to direct light appropriately to the viewer's eyes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If 3D images are displayed assuming a vertical upright viewer position, then image quality is maintained for upright viewers, but image distortion and loss of depth sensation occur when viewers tilt their heads
Solution Approach 1:
The system dynamically adjusts the 3D image content based on the detected head roll angle of the viewer. The image renderer modifies disparities and magnitudes in real-time according to the viewer's head position, transforming a static display system into an adaptive one that maintains image quality across different viewing positions.
Solution Approach 2:
The system changes key parameters of the 3D image (disparities and magnitudes) based on the detected head roll angle. By adjusting these parameters dynamically, the system compensates for head tilt and maintains proper depth perception and image quality regardless of the viewer's head position.
2Device complexity
If conventional 3D displays are used without head position detection, then device complexity is low, but viewer discomfort and image crosstalk occur during head tilting
Solution Approach 1:
The system employs a feedback mechanism where a sensor detects the viewer's head roll angle and sends this information to the image renderer, which then adjusts the 3D image content accordingly. This closed-loop feedback system eliminates viewer discomfort by continuously adapting the display to the viewer's actual head position.
Solution Approach 2:
The patent replaces the need for mechanical head position adjustment mechanisms with an electronic sensing and software-based image adjustment system. Instead of physically moving components, the system uses sensors and digital image processing to achieve the same adaptive functionality.
3Reliability
If 3D images are adjusted for head roll using sensor detection, then depth sensation is preserved during head tilting, but device complexity increases due to additional sensors and processing
Solution Approach 1:
The system performs preliminary detection of the head roll angle and calculates the necessary image adjustments before the viewer actually experiences distortion. By anticipating and pre-adjusting for head tilt, the system maintains depth sensation without requiring complex real-time correction mechanisms during the viewing process.
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
Enables comfortable and distortion-free 3D viewing experiences even when the viewer's head is tilted, by dynamically adjusting disparities and magnitudes of 3D images to align with the viewer's position, thus preserving depth sensation and image quality.
Implementation Method 1
an optical layer overlapping the display and arranged to direct light to be emitted by pixels toward the eye of the first viewer to display the first 3D image
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
Provided is a display including: a sensor coupled to the display to detect a first position corresponding to at least one eye of a first viewer; and an image renderer coupled to the sensor to adjust a first image of a first 3D image pair to be displayed towards the eye of the first viewer according to the first position.