Polarization Beam Deflection Layer for Compact Fast 3D Displays
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Solution Overview
Problem
Existing 3D display devices face challenges with scattering phenomena due to beam deflection, leading to bulkiness in spatial-multiplexing methods and slow response speeds in time-multiplexing methods, as they require separate driving for each color light.
Innovation Solution
A beam deflection layer comprising selective polarization conversion-splitters and deflectors that split and convert light into different polarization directions, allowing for efficient beam deflection and control of light beams across multiple wavelength bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If spatial-multiplexing method is used to eliminate scattering phenomenon, then scattering is reduced, but the system becomes bulky
Solution Approach 1:
The patent combines multiple beam deflection functions for different wavelength bands into a single integrated beam deflector. The beam deflector simultaneously deflects first color light and second color light through unified control, eliminating the need for separate deflection systems for each color, thus reducing system bulkiness while maintaining scattering elimination effectiveness
Solution Approach 2:
The beam deflector is designed with universal functionality to handle multiple wavelength bands (first color light and second color light) through a single device. By applying unified control signals, the same beam deflector structure performs deflection for different colors, making the system more compact compared to having dedicated defectors for each wavelength
2Object-affected harmful factors
If time-multiplexing method is used to eliminate scattering phenomenon, then scattering is reduced, but the response speed becomes slow
Solution Approach 1:
The patent merges the deflection control for multiple wavelength bands into a single unified control system. The beam deflector responds to unified control signals that simultaneously manage first color light and second color light, achieving fast response speeds comparable to spatial-multiplexing while eliminating scattering through coordinated deflection of all color components
Solution Approach 2:
The unified control system enables continuous and simultaneous deflection control for all wavelength bands without sequential processing delays. The beam deflector maintains continuous operation across all colors through unified signaling, eliminating the time-multiplexing delays that would otherwise slow down the response speed
3Object-affected harmful factors
If separate beam deflection is performed for each color light, then scattering is eliminated, but the device complexity increases
Solution Approach 1:
The patent merges separate beam deflection operations for different colors into a single unified beam deflection process. The control system generates unified control signals that simultaneously manage the deflection of first color light and second color light through one beam deflector, reducing device complexity while maintaining the ability to eliminate scattering for all wavelengths
Solution Approach 2:
The beam deflector is designed as a universal device capable of handling multiple wavelength bands through a single structure and control mechanism. This multi-functional approach eliminates the need for multiple specialized defectors, thereby reducing overall device complexity while still achieving scattering elimination across all color lights
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 enables compact and fast beam deflection, reducing bulkiness and improving response speed while minimizing scattering, thereby enhancing the performance of 3D display devices.
Implementation Method 1
a first selective polarization conversion-splitter configured to split at least part of an incident light beam into first polarized light and second polarized light having different polarization directions from each other
Implementation Method 2
a first beam deflector configured to deflect the first polarized light in the light beam from the first selective polarization conversion-splitter
Implementation Method 3
a first selective polarization converter configured to convert polarization directions of the first polarized light and the second polarized light in the light beam from the first beam deflector
Implementation Method 4
a second beam deflector configured to deflect the second polarized light in the light beam from the first selective polarization converter
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A beam deflection layer includes: a first selective polarization conversion-splitter that splits first color light in an incident light beam into first first color light and second first color light having different polarization directions from each other; a first beam deflector that deflects the first first color light in the light beam from the first selective polarization conversion-splitter, a first selective polarization converter that converts polarization directions of the first first color light and the second first color light in the light beam from the first beam deflector, and a second beam deflector configured to deflect the second first color light in the light beam from the first selective polarization converter. The first color light, the first first color light, and the second first color light each have a first wavelength band.