Controllable Microlens Array for Multi-Planar Stereoscopic Display
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Solution Overview
Problem
Current stereoscopic display technologies, such as multi-planar displays, face challenges including complexity in design and manufacturing, brightness loss, and discomfort due to precise alignment requirements and multiple layers, which affect the viewer's experience.
Innovation Solution
A stereoscopic display device with a controllable microlens array and drive electrode array that allows for independent imaging of different display regions, enabling focal length adjustments to achieve desired depth of field effects without multiple layers, using a single display unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple superimposed display panels are used to achieve multi-planar stereoscopic display, then the stereoscopic effect is improved, but the device complexity and manufacturing difficulty increase due to strict interlayer spacing requirements
Solution Approach 1:
The patent segments the display into multiple virtual layers by controlling light from a single physical display panel through a microlens array. Each microlens corresponds to specific pixel regions and directs light to different focal planes, creating multiple stereoscopic layers without requiring multiple physical panels. This segmentation approach maintains stereoscopic capability while eliminating the complexity of multi-panel assembly and alignment.
Solution Approach 2:
The microlens array serves as an intermediary component between the display panel and the viewer's eyes. It mediates the light paths from the display panel to create multiple focal planes at different depths, enabling multi-planar stereoscopic display without the need for multiple physical display panels. This intermediary approach simplifies the overall structure while achieving the desired stereoscopic effect.
2Adaptability or versatility
If multiple superimposed display panels are used for multi-planar stereoscopic display, then depth perception is enhanced, but brightness loss occurs due to light transmission through multiple layers
Solution Approach 1:
The patent extracts the depth control function from the physical panel structure and implements it through optical manipulation by the microlens array. Instead of using multiple physical panels that would cause cumulative brightness loss, the system extracts and directs light from a single bright display panel to multiple virtual focal planes. This extraction approach preserves brightness while achieving multi-planar depth effects.
Solution Approach 2:
The system creates multiple virtual copies of the display content at different focal planes through the microlens array. Each microlens set directs light to form an image at a specific depth plane, effectively copying the visual information to multiple depth layers without requiring multiple physical panels. This copying mechanism maintains the brightness of the original display while creating the perception of multiple depth planes.
3Adaptability or versatility
If parallax images type display is used with right and left eye visible areas, then stereoscopic imaging is achieved, but viewer comfort deteriorates due to narrow viewing areas and inversion zones
Solution Approach 1:
The patent implements dynamic focal plane control where the microlens array can adjust which focal plane is active at different time segments. This dynamic switching allows the system to adapt to different viewing conditions and maintain comfortable viewing across a wider area compared to static parallax displays. The time-division multiplexing of different focal planes creates a more tolerant viewing experience.
Solution Approach 2:
The system uses periodic time-division multiplexing to display different focal plane information to different eye groups in alternating time segments. This periodic action allows each eye group to receive appropriate focal information at the right time, eliminating the inversion zones and narrow viewing areas problems of simultaneous parallax displays. The periodic switching creates a comfortable viewing experience across the entire display area.
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
This solution simplifies the structure and manufacturing process, reduces brightness loss, and enhances the stereoscopic display effect by allowing for precise focal adjustments, resulting in a lighter, thinner, and more comfortable viewing experience.
Implementation Method 1
microlenses in the microlens array being controllable are driven by drive electrodes of the microlens drive electrode array and exhibit respective focal lengths corresponding to voltages of the drive electrodes of the microlens drive electrode array
Implementation Method 2
microlenses in the microlens array being controllable are driven by drive electrodes of the microlens drive electrode array and exhibit respective focal lengths corresponding to voltages of the drive electrodes
Data Source
AI summary
A stereoscopic display device and a stereoscopic display control method are provided. The stereoscopic display device includes a display unit and a layering-control unit on a light exiting side of the display unit, wherein, the layering-control unit comprises a microlens drive electrode array and a microlens array being controllable, and wherein microlenses in the microlens array being controllable are driven by drive electrodes of the microlens drive electrode array and exhibit respective focal lengths corresponding to voltages of the drive electrodes of the microlens drive electrode array.