Polarization-Controlled 2D/3D Display for Reduced Optical Crosstalk
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Solution Overview
Problem
Display devices with lens structures experience light interference due to light blocking members, which can damage external visibility.
Innovation Solution
A display device with a variable light transmission layer and a lens layer that includes lenses and a polarization pattern, allowing operation in both 2D and 3D modes by controlling light transmission and refraction based on polarization direction changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light blocking member is disposed to prevent light interference, then optical crosstalk is reduced, but external visibility is damaged
Solution Approach 1:
The light blocking member's light transmission property is made dynamically controllable through a variable light transmission layer (liquid crystal layer) that can switch between transmitting and blocking light based on applied voltage, allowing the system to adapt between different operational modes (2D/3D) and resolve the contradiction between reducing optical crosstalk and maintaining external visibility
Solution Approach 2:
The optical properties of the light blocking member are changed by modifying the polarization state of light using a polarization pattern and variable light transmission layer, allowing selective transmission or blocking of light based on polarization direction rather than physical presence/absence of the light blocking member
2Adaptability or versatility
If a lens structure is added to implement stereoscopic image, then 3D image capability is improved, but light interference between adjacent lenses occurs
Solution Approach 1:
A polarization pattern is introduced as an intermediary element between adjacent lenses to control the polarization state of light passing through each lens, preventing light interference by ensuring that light from adjacent lenses has different polarization states that do not interfere with each other
Solution Approach 2:
The polarization pattern is selectively disposed in boundary areas between adjacent lenses rather than uniformly across the entire lens array, providing localized control over light transmission and polarization to prevent interference only where needed while maintaining 3D image capability
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
Reduces optical crosstalk and enhances image visibility by selectively transmitting or refracting light based on the device's mode of operation, maintaining high image quality in both 2D and 3D modes.
Implementation Method 1
the variable light transmission layer includes liquid crystal molecules... When the display device operates in 2D image mode, a phase of the input polarization light changes by 90 degrees as the input polarization light passes through the variable light transmission layer
Implementation Method 2
the polarization pattern transmits light when the display device operates in 2D image mode, and blocks light when the display device operates in 3D image mode... a polarization direction of the input polarization light and a polarization direction of the polarization pattern differ from each other
Implementation Method 3
a lens layer disposed on the variable light transmission layer and that includes lenses... when the display device operates in 3D image mode, light is refracted at the interface
Implementation Method 4
the outer layer and the lenses form an interface... When the display device operates in 2D image mode, light is transmitted through the interface without refraction... when the display device operates in the 3D image mode, light is refracted at the interface
Data Source
AI summary
A display device includes a display panel that includes a pixel, a variable light transmission layer disposed on the display panel and that includes liquid crystal molecules, and a lens layer disposed on the variable light transmission layer and that includes lenses and a polarization pattern. The polarization pattern overlaps a boundary area between adjacent lenses. The display device operates in a 2D image mode that provides a 2D image or a 3D image mode that provides a 3D image, and the polarization pattern transmits light when the display device operates in 2D image mode, and blocks light when the display device operates in 3D image mode.