Liquid Crystal Viewing Angle Control Module for Stereoscopic Displays
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Solution Overview
Problem
Current stereoscopic display technologies face challenges in achieving high resolution and accurate alignment of left/right-eye pixels and light splitting structures, leading to image crosstalk and moiré patterns that affect the visual quality of stereoscopic images.
Innovation Solution
A viewing angle control module is introduced, comprising a first liquid crystal panel, polarizers, and a phase retarder, which allows for independent control of viewing angles by using electrode patterns to block specific zones, thereby generating a specific field of view for stereoscopic display without the need for pixel-size level alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If barrier-type or lenticular type light splitting structures are used to achieve stereoscopic display, then stereoscopic viewing effect is improved, but alignment precision between display panel and light splitting structures must be at pixel-size level, increasing manufacturing difficulty
Solution Approach 1:
A liquid crystal layer is introduced as an intermediary between the display panel and the viewer's eyes. This liquid crystal layer acts as a controllable light modulator that can dynamically adjust viewing angles and block specific zones, replacing the need for precise mechanical alignment of barrier or lenticular structures with the display panel.
Solution Approach 2:
The patent changes the optical parameters of the light path by using liquid crystal molecules that can rotate and change their optical properties when voltage is applied. By controlling the orientation and phase of liquid crystal molecules through alignment layers and electrodes, the system dynamically adjusts light transmission angles without requiring fixed mechanical structures to be precisely aligned.
2Reliability
If barrier-type or lenticular type light splitting structures are used, then stereoscopic display is achieved, but periodic structures create moiré patterns, affecting display quality
Solution Approach 1:
The patent replaces the mechanical periodic structures (barrier films or lenticular lenses) with a liquid crystal-based optical system. Instead of using fixed periodic physical structures to split light, the system uses electrically controllable liquid crystal molecules that can dynamically modulate light transmission, eliminating the periodic interference patterns that cause moiré effects.
3Reliability
If left-eye and right-eye pixels are divided on the display panel, then stereoscopic image display is enabled, but the resolution of the presented stereoscopic image is lower than the original resolution of the display panel
Solution Approach 1:
Instead of dividing display pixels into left-eye and right-eye pixels on the same panel, the patent segments the viewing space by using a liquid crystal layer that can independently control light transmission to different viewing zones. This allows the full resolution of the display panel to be utilized for both eyes simultaneously, as each eye receives light from the entire panel through controlled transmission paths.
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 high-resolution stereoscopic displays with improved process flexibility and reduced interference patterns, enhancing the visual quality and ease of assembly of the display apparatus.
Implementation Method 1
a phase retarder is disposed between the first polarizer and the first liquid crystal panel
Implementation Method 2
The first alignment layer is disposed on the first substrate and has a first alignment direction. The second alignment layer is disposed on the second substrate and has a second alignment direction.
Implementation Method 3
The first polarizer is disposed on one side of the first substrate away from the first liquid crystal layer and has a first absorption axis. A second polarizer is disposed on one side of the second substrate away from the first liquid crystal layer and has a second absorption axis.
Data Source
AI summary
The disclosure provides a viewing angle control module including a first liquid crystal panel, a first polarizer, a second polarizer, and a phase retarder. The first liquid crystal panel includes a first substrate, a second substrate, a first alignment layer, a second alignment layer, a first liquid crystal layer, a first electrode layer, and a second electrode layer. A second alignment direction of the second alignment layer is antiparallel to a first alignment direction of the first alignment layer. The first electrode layer has multiple electrode patterns arranged at intervals along a first direction and extending along a second direction. A first absorption axis of the first polarizer is perpendicular to a second absorption axis of the second polarizer. An included angle between the first absorption axis and the first alignment direction is 45 degrees. A display apparatus including the viewing angle control module is also provided.