Dual-View Display Liquid Crystal Grating for Flexible Observer Tracking
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Solution Overview
Problem
Existing dual-view display technologies require observers to be positioned at specific angles to achieve optimal viewing, limiting flexibility and causing inconvenience when multiple viewers try to watch different content simultaneously, as they often need to be far apart to avoid interference.
Innovation Solution
A dual-view display method and device that uses a liquid crystal grating to adaptively adjust the light exiting direction based on observer positions and numbers, allowing for real-time tracking and optimal viewing angles for multiple observers by determining observation modes and calculating refractive indices to direct light effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed grating structure is used to achieve dual-view display, then the light exiting direction is determined, but the viewing angle flexibility is limited and observers must be positioned at specific angles
Solution Approach 1:
The patent applies a liquid crystal grating that can dynamically adjust its refractive index through voltage control, enabling the light exiting direction to be adaptively changed based on observer positions. This transforms the fixed optical path into a dynamic one that responds to observer location, resolving the contradiction between fixed structure and viewing flexibility.
Solution Approach 2:
The patent changes the refractive index parameter of the liquid crystal grating by applying different voltages, which directly controls the light exiting direction. This parameter adjustment mechanism allows the system to adapt to different viewing angles without physical reconfiguration, solving the contradiction between structural fixedness and operational flexibility.
2Reliability
If large angle separation is used to avoid picture interference in dual-view mode, then display separation is achieved, but observers must be far apart affecting interaction
Solution Approach 1:
The patent uses voltage-controlled refractive index changes in the liquid crystal grating to precisely control the light exiting directions for different views. This allows for smaller angular separation between the two views while maintaining effective picture separation, enabling observers to sit closer together without interference and improving interaction while preserving display quality.
3Productivity
If traditional dual-view display is used with fixed light exiting directions, then two pictures can be displayed, but the display effect drops sharply when observation position changes
Solution Approach 1:
The patent incorporates eye tracking technology that detects observer position and provides feedback to the control system. This feedback mechanism enables real-time adjustment of the liquid crystal grating's refractive index to maintain optimal light exiting directions, ensuring stable display effect regardless of observation position changes while adapting to viewer location dynamically.
Solution Approach 2:
The system transitions from static light exiting directions to dynamic adjustment based on real-time observer position detection. The liquid crystal grating's refractive index is continuously adjusted according to eye tracking data, maintaining display quality across varying observation positions and resolving the contradiction between effect stability and position adaptability.
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
Enables flexible viewing angles for multiple observers, improving display quality and reducing light intensity requirements, thus enhancing energy efficiency and extending device lifespan.
Implementation Method 1
The liquid crystal grating is provided on a light exiting side of the display module, and is configured to cause light emitted from the display module to be deflected in a specified refractive index mode under an action of a control voltage
Data Source
AI summary
Provided by embodiments of the present disclosure are a dual-view display method and device, and a non-transitory computer readable storage medium. The dual-view display method is used for a dual-view display device including a display module and a liquid crystal grating, the method includes obtaining information of an observer, adjusting an operation mode of the liquid crystal grating according to the information of the observer, to adjust a light exiting direction and a display mode of the display device and displaying an image in the display mode according to the information of the observer, and the operation mode of the liquid crystal grating is adjustable.