ECB Liquid Crystal Retarder Panel for 3D Display Light Leakage
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Solution Overview
Problem
Conventional stereoscopic image display devices using switchable retarder panels suffer from residual retardation, leading to light leakage in polarization glasses, which affects the quality of 3D image display.
Innovation Solution
The use of a stereoscopic image display device with a switchable retarder panel made of electrically controlled birefringence (ECB) liquid crystals, combined with polarization glasses having specific orientations of polarizers and wave plates to control and polarize light, effectively mitigating residual retardation and light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a switchable retarder panel is used to convert light into polarized light for stereoscopic display, then the three-dimensional effect is improved, but residual retardation causes light leakage in polarization glasses
Solution Approach 1:
The patent changes the optical parameters of the liquid crystal panel by setting specific viewing angles (8 degrees for horizontal, 4 degrees for vertical) and using a specific liquid crystal material (ZLI-2803) to minimize residual retardation and eliminate light leakage while maintaining stereoscopic display quality
Solution Approach 2:
The patent converts the residual retardation effect, which was previously harmful causing light leakage, into a beneficial effect by precisely controlling the viewing angles and liquid crystal properties to achieve complete polarization without leakage, turning the potential defect into a feature for improved display reliability
2Device complexity
If conventional liquid crystal materials are used in the switchable retarder panel, then the device complexity is reduced, but the response time is slow and residual retardation occurs
Solution Approach 1:
The patent changes the material parameters by selecting a specific liquid crystal compound (ZLI-2803) with optimized molecular structure and optical properties that provides both fast response time and minimal residual retardation, eliminating the need for complex multi-layer structures
Solution Approach 2:
The patent uses a composite approach by combining the specific liquid crystal material ZLI-2803 with a precisely engineered viewing angle structure (8 degrees horizontal, 4 degrees vertical) to achieve both fast response and low residual retardation without increasing device complexity
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 configuration enhances the display quality by reducing light leakage and improving the response time, thereby providing a more effective stereoscopic image display with reduced crosstalk and improved resolution.
Implementation Method 1
a switchable retarder panel configured to control light emitted from the display device and made of electrically controlled birefriengence (ECB) liquid crystals
Implementation Method 2
polarization glasses configured to polarize the light emitted from the switchable retarder panel. The polarization glasses comprise a left eyeglass comprising a polarizer having a tilt of 45° about a light absorbing axis, and a right eyeglass comprising a polarizer having a tilt of 135° about the light absorbing axis
Data Source
AI summary
This document discloses a stereoscopic image display device. In the image display device, a display device displays a first image data and a second image data in a time-dividing manner. A switchable retarder panel is configured to control light emitted from the display device and is made of electrically controlled birefringence (ECB) liquid crystals. Polarization glasses polarize the light emitted from the switchable retarder panel. The polarization glasses comprise a left eyeglass comprising a polarizer having a tilt of 45° about a light absorbing axis, and a right eyeglass comprising a polarizer having a tilt of 135° about the light absorbing axis.