Holographic LCD Stereo Display with Layered Panel Synchronization
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Solution Overview
Problem
Current three-dimensional display technologies, such as stacked liquid crystal displays, fail to provide a vivid and wide-angle view of semi-transparent objects or the back of objects, with limited color capability and poor depth perception due to overlapping images and lack of correlation between individual screens.
Innovation Solution
A holographic liquid crystal display system utilizing a layer-by-layer scan synchronization driver circuit to control multiple LCD panels, where only one panel displays an image while others are in a fully transmissive state, allowing sequential projection of decomposed holographic stereo images at a refresh frequency of at least 46 Hz to create a vivid, real-time three-dimensional effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple liquid crystal display screens are stacked to form a three-dimensional display, then the three-dimensional display capability is improved, but the correlation between individual screens is poor resulting in merely overlapped images with weak three-dimensional effect
Solution Approach 1:
The patent divides the holographic image into multiple layer images corresponding to different depth positions. Each liquid crystal display screen displays a specific layer image rather than all images simultaneously, creating distinct visual layers that the human brain combines into a coherent three-dimensional holographic image with proper depth perception
Solution Approach 2:
The patent introduces the time dimension by sequentially switching the display state of each liquid crystal screen at different time points within a refresh cycle. This temporal sequencing, combined with spatial arrangement of multiple screens, creates a four-dimensional display approach that achieves superior three-dimensional effect compared to simultaneous static display of multiple images
2Device complexity
If individual liquid crystal display screens are used without color films, then the device complexity is reduced, but the color display capability is lost and only grayscale adjustment is possible
Solution Approach 1:
The patent merges the color display functionality into the projection system rather than requiring color films on each liquid crystal screen. The projection device projects color images onto the liquid crystal screens, which then modulate the light intensity to display grayscale layer images while preserving the color information from the projection source
Solution Approach 2:
The patent introduces a projection device as an intermediary between the image source and the liquid crystal display screens. This projection device generates the color images and layer structure, while the liquid crystal screens act as modulators that control the visibility of each layer in sequence, separating the color generation function from the spatial modulation function
3Adaptability or versatility
If two two-dimensional displays are used for brightness modulation three-dimensional display, then the three-dimensional display function is achieved, but the viewing angle is confined to specific positions with poor viewing experience
Solution Approach 1:
The patent segments the single viewing cone into multiple viewing cones by using multiple liquid crystal display screens arranged at different positions. Each screen contributes to a specific angular range, and their combined output provides a wide overall viewing angle with consistent three-dimensional effect across different viewing positions
Solution Approach 2:
The patent expands the viewing angle by utilizing the spatial arrangement of multiple screens in addition to temporal sequencing. The physical distribution of screens across different angular positions creates a broader effective viewing cone, transforming a point-viewing solution into a multi-position viewing solution through spatial dimensionality
4Adaptability or versatility
If stacked liquid crystal displays are used for three-dimensional display, then the three-dimensional display capability is improved, but semi-transparent objects and back surfaces cannot be displayed effectively
Solution Approach 1:
The patent segments the object representation into multiple depth layers, with each liquid crystal screen dedicated to displaying a specific depth layer. This layer-by-layer display approach allows simultaneous visualization of front surfaces, semi-transparent regions, and back surfaces by controlling the transparency and timing of each layer, providing complete three-dimensional object information including occluded and transparent areas
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 system achieves a vivid, real-naked-eye three-dimensional image display by reflecting the actual physical depth of the holographic stereo image, enhancing viewing angles and color representation, overcoming limitations of previous technologies.
Implementation Method 1
Each display screen is composed of a glass substrate, transparent electrodes and a liquid crystal layer
Implementation Method 2
The liquid crystal layers of each liquid crystal display screen are driven by a driver circuit to display different images
Implementation Method 3
a holographic projection device for projecting a plurality of decomposed images obtained by decomposing a holographic stereo image in a certain sequence onto the holographic LCD
Implementation Method 4
controls the multiple LCD panels to display in sequence the decomposed images projected, and according to the refresh frequency and in one refresh period, controls only one of the multiple LCD panels to display the decomposed image projected and the other panels of the multiple LCD panels to be in a fully transmissive state
Data Source
AI summary
A holographic LCD stereo display system is disclosed. The holographic LCD stereo display system comprises: a holographic projection device (11), a signal synchronous generator (12) and a holographic LCD having multiple layer of LCD panels. In the system, the holographic projection device (11) decomposes a stored holographic stereo image to obtain decomposes images and projects the decomposed images to the holographic LCD (13) in sequence; the holographic LCD (13) controls, according to a synchronous signal received from the signal synchronous generator (12), the multiple layers of LCD panels to display projected decomposed images in sequence; and when a frequency at which the holographic LCD (13) displays the decomposed images is not less than 46 Hz, with visual persistence effect of human eyes, the decomposed images become real three-dimensional stereo images in human brains, so that the holographic stereo three-dimensional images are presented stereo images in the holographic LCD (13), thereby achieving an effect of vividly displaying real naked-eye three-dimensional images. Further disclosed are a holographic LCD and a stereo display method.