Autostereoscopic Display Device Viewing Angle Depth Perception
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Solution Overview
Problem
Existing autostereoscopic display devices sacrifice horizontal resolution and depth perception for a wide viewing angle, resulting in undesirable trade-offs between image quality and three-dimensional depth perception.
Innovation Solution
A multi-view autostereoscopic display device that sequentially drives pixels with information for different views and switches view forming elements between transmitting and shielding states to control the projection angle, allowing for a broader viewing angle without sacrificing display resolution, using liquid crystal display panels and spatially switchable backlights or lenticular lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If views are distributed over a large viewing angle to provide a wide viewing angle, then the viewing angle is improved, but the three dimensional depth perception deteriorates
Solution Approach 1:
The patent applies periodic action by sequentially switching between different view projections in a time-multiplexed manner. The display device alternates between projecting first plurality of views and second plurality of views through different view forming elements, with each sequence repeated at a frequency that creates the perception of continuous multi-view display. This temporal sequencing allows the system to achieve both wide viewing angle and good depth perception by directing different view sets to different spatial regions over time.
2Loss of information
If views are concentrated across a small viewing angle to provide realistic three dimensional depth, then the three dimensional depth perception is improved, but the viewing angle deteriorates
Solution Approach 1:
The patent resolves this contradiction by adding the time dimension to the display system. Instead of concentrating all views in a narrow spatial angle, the device projects different plurality of views at different time intervals within the same viewing angle range. This temporal dimension allows the system to maintain good depth perception for each view sequence while collectively providing a wide effective viewing angle through alternating projection patterns.
3Adaptability or versatility
If display pixels are allocated to multiple views, then the viewing angle and number of views are improved, but the horizontal resolution deteriorates
Solution Approach 1:
The patent uses periodic action to sequentially project different views through different view forming elements. By time-multiplexing the projection of first and second pluralities of views, the system can allocate display pixels to multiple views without permanently reducing the horizontal resolution of each individual view. The alternating projection pattern ensures that each view maintains full horizontal resolution while the overall system provides multiple views.
4Duration of action of moving object
If display pixels are allocated to multiple views, then the viewing angle is improved, but the image resolution deteriorates
Solution Approach 1:
The patent applies dynamics by making the view forming elements switchable between different states. The view forming elements can be dynamically configured to direct different pluralities of views to different spatial regions, allowing the system to adaptively allocate pixel information to multiple views while maintaining image resolution. This dynamic switching capability enables the display to provide wide viewing angle and multiple views without permanently sacrificing image quality.
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 provides a greater perception of depth and a wider viewing angle while maintaining high image quality, with the ability to operate in both multi-view and two-dimensional modes without degradation, effectively addressing the trade-offs in existing technologies.
Implementation Method 1
The view forming elements are arranged to be switched between a transmissive state and a shielding state. The image forming means is driven sequentially with information for a first plurality of views and a second plurality of views. The different views are projected in different directions by switching the view forming elements between transmitting and shielding states
Implementation Method 2
An array of lenticular elements extending parallel to one another overlies the display pixel array and acts as a view forming element. The lenticular elements extend in the column direction of the display panel, with each lenticular element overlying a respective group of two or more adjacent columns of display pixels
Data Source
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AI summary
A multi-view autostereoscopic display device (101) comprises: an image forming means (103); a view forming means (109,117); and a driving means (119). The driving means is arranged to: in a first portion of a driving cycle, drive a first group of display pixels (105) with display data for a first plurality of views and in a second portion of the driving cycle, drive the first group of display pixels with display data for a second plurality of views The second plurality of views are projected in different directions to the first plurality of views, thereby broadening a viewing angle of the device.