Autostereoscopic Display See-Through Mode Polarization
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Solution Overview
Problem
Current transparent display technologies lack the capability to provide 3D viewing without distorting the view of the background, as lenticular lenses or parallax barriers affect both emitted and transmitted light, preventing undistorted image observation.
Innovation Solution
A display device with a polarization-sensitive view forming arrangement that directs light of one polarization state for 3D viewing while allowing light of an orthogonal polarization state to pass undisturbed, enabling both 3D mode and see-through mode operations by using a polarization filter to block the first polarization state behind the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lenticular lens or parallax barrier is placed on top of a conventional transparent display, then 3D viewing capability is provided, but the light transmitted through the display is distorted preventing an undistorted view of the image behind the display
Solution Approach 1:
The invention segments the light transmission paths by using multiple sub-pixels (first, second, and third sub-pixels) with different polarization characteristics. The first and second sub-pixels transmit light in opposite directions, while the third sub-pixel blocks light, creating distinct channels for 3D content and background visibility without mutual interference.
Solution Approach 2:
Different regions of the display (different sub-pixels) are assigned different optical properties (polarization states and transmission characteristics). This allows each sub-pixel to serve a specific function: some transmit light for background visibility, others block light for 3D content, achieving local optimization of both 3D capability and background clarity.
2Adaptability or versatility
If a polarization-sensitive view forming arrangement is used to direct light for 3D viewing, then multiple views can be displayed in different directions, but light of the first polarization is blocked by the polarization filter behind the display
Solution Approach 1:
The display dynamically switches between different operational modes (see-through mode and 3D display mode) by controlling the emission states of different sub-pixels. In see-through mode, first and second sub-pixels transmit light in opposite directions; in 3D mode, the third sub-pixel blocks light while the first sub-pixel directs light for 3D content, allowing adaptive optimization for each mode.
Solution Approach 2:
The invention changes the polarization parameters of light transmission by using sub-pixels with different polarization characteristics. The view forming arrangement manipulates the polarization state of light to direct different views to different directions, while the polarization filter selectively blocks specific polarization states to achieve mode switching between see-through and 3D display.
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 proper 3D content viewing and undistorted observation of scenery behind the display in both 3D and see-through modes, allowing for combined display effects like overlaying 3D content on real scenery.
Implementation Method 1
a polarization-sensitive view forming arrangement over the display output face, for directing light of a given first polarization from different pixels into different directions thereby enable multiple views to be displayed in different directions simultaneously, wherein the view forming arrangement passes light of a second orthogonal polarization without significant change of direction
Implementation Method 2
a polarization filter for blocking light of the first polarization arranged behind the display output face
Data Source
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AI summary
A display device has a first, see-through mode of operation (30), (34) in which the display panel does not emit light and the display device blocks the light of a first polarization (state A) but allows light of a second polarization (state B) to pass through in both opposite directions. In a second, 3D display mode, the emissive pixels output light of the first polarization (state A) from the display output face and a view forming arrangement forms multiple views (36) in one output direction.