Stereoscopic Image Display with Polarization-Based Parallax Separation
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Solution Overview
Problem
Stereoscopic image display devices using non-glasses techniques face issues with adjacent parallax images being viewed in a superimposed state, leading to poor depth perception.
Innovation Solution
A display device with a light transmission control unit that changes the polarized light direction of 3D image display light from a first to a second linearly polarized light direction, using a combination of polarizing electrodes and polarization control layers, along with an optical device that maintains or refracts optical paths to separate and emit light for each viewing angle, ensuring clear separation of left and right eye images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a non-glasses stereoscopic image display device uses a parallax barrier or lenticular lens sheet to separate optical axes, then 3D images can be displayed without 3D glasses, but adjacent parallax images may be viewed in a superimposed state causing poor depth perception
Solution Approach 1:
The display device segments the display area into multiple emission areas corresponding to different viewing angles. Each emission area is assigned to a specific viewing angle, and the light transmission control unit controls light transmission separately for each emission area. This segmentation prevents superimposition of adjacent parallax images by ensuring that light from different viewing angles is emitted from distinct spatial regions.
Solution Approach 2:
The light transmission control unit dynamically adjusts its light transmission properties based on the displayed image type (2D or 3D) and viewing angle. When displaying 3D images, it selectively transmits light from different emission areas to different viewing angles; when displaying 2D images, it transmits light uniformly across all emission areas. This dynamic control prevents image superimposition while maintaining flexibility in display modes.
2Reliability
If the display device sends separate images to left and right eyes using polarization control, then stereoscopic perception is achieved, but the device complexity increases with additional control units and layers
Solution Approach 1:
The light transmission control unit serves multiple functions: it controls light transmission for different viewing angles, separates parallax images, and supports both 2D and 3D display modes. The emission area control unit also manages both the selection of emission areas and the timing of light transmission. This multi-functionality reduces the need for separate dedicated components for each function, thereby reducing overall device complexity while maintaining reliable stereoscopic image quality.
Solution Approach 2:
The patent combines the polarization control function with the light transmission control function in a single integrated unit. The light transmission control unit incorporates both polarizing electrodes and polarization control layers that work together to achieve both polarization-based image separation and angle-specific light transmission control. This merging of functions reduces the number of separate components and simplifies the overall device structure.
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 effectively separates and emits 3D image light for each viewing angle, preventing overlap and enhancing depth perception without the need for 3D glasses, thereby improving the stereoscopic image display quality.
Implementation Method 1
a light transmission control unit passing 2D image display light displayed on the display panel in a first linearly polarized light direction and converting a polarized light direction of 3D image display light displayed on the display panel into a second linearly polarized light direction
Implementation Method 2
an optical device passing the 2D image display light incident in the first linearly polarized light direction through the light transmission control unit while maintaining optical paths of the 2D image display light and refracting and emitting the 3D image display light of which the polarized light direction is converted into the second linearly polarized light direction
Data Source
AI summary
A display device includes a display panel displaying a two-dimensional (2D) image and a three-dimensional (3D) image. A light transmission control unit passes 2D image display light displayed on the display panel in a first linearly polarized light direction and converts a polarized light direction of 3D image display light displayed on the display panel into a second linearly polarized light direction and emits the 3D image display light in the second linearly polarized light direction. An optical device passes the 2D image display light incident in the first linearly polarized light direction through the light transmission control unit while maintaining optical paths of the 2D image display light and refracting and emitting the 3D image display light of which the polarized light direction is converted into the second linearly polarized light direction through light transmission control unit.