Stereoscopic Display Phase Conversion for Luminance
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Solution Overview
Problem
Conventional 3D stereoscopic image display technologies using polarization methods face issues with reduced luminance due to the need for multiple liquid crystal panels, complex structures, and decreased brightness, as well as performance degradation at varying incident angles and viewing angles.
Innovation Solution
A stereoscopic image display device that splits incident light into polarized components and uses a single liquid crystal panel in each optical switch module to delay and convert the phases of the split lights, synthesizing them to achieve the same polarized component for enhanced luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plurality of liquid crystal panels are overlapped to selectively polarize vertical and horizontal lights, then the polarization function is improved, but the thickness becomes thicker and the structure becomes complicated
Solution Approach 1:
The patent divides the optical path into two separate channels: a first optical switch module for horizontally polarized light and a second optical switch module for vertically polarized light. Each module uses a single liquid crystal panel instead of overlapping multiple panels, thereby simplifying the structure while maintaining the polarization function.
Solution Approach 2:
The patent introduces a light splitter as an intermediary component that separates incident light into horizontally and vertically polarized components. This allows each polarization component to be processed independently by dedicated optical switch modules, eliminating the need for overlapping liquid crystal panels.
2Reliability
If a plurality of liquid crystal panels are overlapped to selectively polarize vertical and horizontal lights, then the polarization function is improved, but the luminance is reduced
Solution Approach 1:
By segmenting the optical system into separate modules for horizontal and vertical polarization, each module uses only one liquid crystal panel. This eliminates the luminance loss that would occur with multiple overlapping panels while maintaining complete polarization control through the light splitter.
3Ease of manufacture
If the surface of the polarizing beam splitter forms the same coating layer, then the manufacturing is simplified, but the performance is significantly reduced toward the both-side end portions due to different incident angles
Solution Approach 1:
The patent applies different coating layers to different regions of the polarizing beam splitter: a first coating layer for light incident at a first angle and a second coating layer for light incident at a second angle. This local differentiation ensures optimal performance across the entire surface while maintaining manufacturing feasibility.
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 reduces the thickness and complexity of the display device, increases brightness, and maintains consistent light transmittance across the polarizing beam splitter, resulting in doubled luminance on the screen compared to conventional methods.
Implementation Method 1
a light splitter configured to split an incident light transmitted from a projector into a first polarized light and a second polarized light according to a polarization component
Implementation Method 2
a first liquid crystal (LC) panel configured to delay a phase of the linearly-polarized first polarized light by λ/2 as a voltage corresponding to a first level is applied to convert the first polarized light into the second polarized light
Implementation Method 3
a first phase delaying member configured to further delay the second polarized light by λ/4 to output a circular polarized light
Data Source
AI summary
The present invention relates to a stereoscopic image display through which after the incident light incident from a projector lens is split into different lights according to polarized components, by selectively delaying the phase of each split light by a predetermined value through an on/off operation of an optical switch module, each light is converted to have the same polarized component, and the synthesized light obtained by synthesizing the lights having the same polarized component is projected on a screen so as to double the luminance on the screen.