Holographic Display Panel Liquid Crystal Grating Segmentation
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Solution Overview
Problem
Existing holographic display systems require a high screen refresh rate for liquid crystal grating modules to achieve 3D holographic display, which is challenging due to the high demands on the liquid crystal grating module's refresh rate, often resulting in reduced image quality and increased power consumption.
Innovation Solution
The proposed holographic display system incorporates a plurality of liquid crystal grating modules sequentially arranged, with a first optical rotator capable of rotating the polarization direction of incident light. This allows at least one liquid crystal grating module to change the propagation direction of light within a preset duration, while others maintain the direction, thereby reducing the screen refresh rate requirement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single liquid crystal grating module is used to achieve 3D holographic display, then the display function is realized, but the screen refresh rate requirement becomes excessively high
Solution Approach 1:
The patent divides a single liquid crystal grating module into multiple liquid crystal grating modules (first liquid crystal grating module, second liquid crystal grating module, etc.) arranged in sequence. Each module handles a portion of the light modulation task, allowing the system to achieve the required display function while reducing the refresh rate burden on each individual module.
Solution Approach 2:
The patent introduces optical rotators that can dynamically change the polarization direction of incident light. By controlling the optical rotators to switch between different polarization states, the system can alternately direct light to different liquid crystal grating modules, effectively distributing the refresh rate requirement across multiple modules operating at lower individual rates.
2Adaptability or versatility
If a high screen refresh rate is maintained for the liquid crystal grating module, then the 3D holographic display function is preserved, but power consumption increases
Solution Approach 1:
By segmenting the liquid crystal grating functionality across multiple modules, each module operates at a lower refresh rate, directly reducing the total power consumption while maintaining the overall display function through coordinated operation of all modules.
Solution Approach 2:
The patent implements periodic switching of optical rotators to alternate between different liquid crystal grating modules. This periodic action allows each module to operate intermittently at a lower refresh rate rather than continuously at a high refresh rate, significantly reducing power consumption while maintaining display continuity.
3Productivity
If a high screen refresh rate is required for the liquid crystal grating module, then the holographic display can be updated quickly, but image quality deteriorates
Solution Approach 1:
Dividing the display update task across multiple liquid crystal grating modules allows each module to operate at a lower refresh rate with sufficient time for stable light modulation, thereby maintaining image quality while achieving fast overall display updates through the combined output of all modules.
Solution Approach 2:
The dynamic control of optical rotators enables smooth transitions between different liquid crystal grating modules. By carefully managing the switching timing and polarization states, the system maintains stable image quality during transitions while achieving fast display updates through coordinated dynamic operation.
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 approach significantly reduces the screen refresh rate of the liquid crystal grating modules, alleviating the high refresh rate demands and improving image quality while lowering power consumption.
Implementation Method 1
A first optical rotator is disposed on a light-incident side of at least one liquid crystal grating module of the plurality of liquid crystal grating modules. The first optical rotator is capable of rotating the polarization direction of the incident light
Implementation Method 2
Based on a polarization direction of incident light, a liquid crystal grating module of the plurality of liquid crystal grating modules is capable of changing a propagation direction of the incident light
Data Source
AI summary
A holographic display system, a holographic display method and an electronic device are provided. The holographic display system includes a backlight module configured to emit a backlight beam, a spatial light modulator configured to perform phase and amplitude modulations on the backlight beam, and a plurality of liquid crystal grating modules that are sequentially arranged in a first direction. Based on a polarization direction of incident light, a liquid crystal grating module is capable of changing or maintaining a propagation direction of the incident light. A first optical rotator disposed on a light-incident side of the liquid crystal grating module is capable of rotating the polarization direction of the incident light, to make at least one liquid crystal grating module change the propagation direction of the incident light, and at least one liquid crystal grating module do not change the propagation direction of the incident light within a preset duration.