Liquid Crystal Grating Panel for Full-Resolution Stereo Display
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Solution Overview
Problem
Conventional liquid crystal grating type stereo display devices achieve stereoscopic effects but at the cost of lower resolution, resulting in poor picture quality.
Innovation Solution
A liquid crystal grating panel with additional electrodes separated by insulating layers, allowing for the formation of alternating electric fields to selectively transmit images from odd and even pixel columns to the left and right eyes, maintaining high resolution by alternating frame scanning periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional liquid crystal grating panel with two layers of electrodes is used to achieve stereoscopic display, then the stereoscopic effect is produced, but the resolution is reduced to half of that of common flat display devices
Solution Approach 1:
The patent divides the electrode structure into multiple independent layers: a first electrode layer with first electrodes, a second electrode layer with second electrodes, and a third electrode layer with third electrodes. Each layer can be independently controlled to form different grating patterns, enabling the system to display high-resolution stereoscopic images by selectively activating specific electrode combinations rather than using a single complex electrode structure
Solution Approach 2:
The patent adds a temporal dimension to the electrode control by introducing frame scanning periods with different scanning directions (first direction in odd frames, second direction in even frames). This temporal segmentation allows the system to display full-resolution images for both left and right eyes over time, effectively resolving the resolution-traditional grating contradiction through time-multiplexed display
2Measurement precision
If alternating frame scanning periods are used to maintain high resolution, then full-resolution stereo display is achieved, but the device complexity increases due to additional electrodes and insulating layers
Solution Approach 1:
The patent implements a nested electrode structure where the first, second, and third electrode layers are stacked in sequence with insulating layers between them. The first electrode layer is positioned on the front surface of the liquid crystal layer, the second electrode layer is embedded within the liquid crystal layer, and the third electrode layer is positioned on the rear surface. This nested arrangement allows multiple electrode functions to be integrated in a compact vertical configuration, reducing horizontal space requirements and enabling precise control of liquid crystal molecules from multiple directions
Solution Approach 2:
The patent introduces insulating layers as intermediary structures between the first, second, and third electrode layers. These insulating layers prevent electrical short circuits between adjacent electrode layers while allowing the electric fields from different layers to act on the liquid crystal molecules. The insulating layers serve as mediators that enable independent control of each electrode layer without electrical interference, making the complex multi-electrode structure functional and controllable
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 solution enables full-resolution stereo display by ensuring that both eyes receive high-resolution images without crosstalk, enhancing the stereoscopic effect while maintaining the display's resolution.
Implementation Method 1
liquid crystals in voltage-applied regions are subjected to vertical arrangement and thus do not have optical rotation activity
Implementation Method 2
liquid crystals in voltage-not-applied regions are twisted and thus have optical rotation activity
Implementation Method 3
When light with different polarization directions passes through a linear polarizer, light of which the polarization direction is the same as that of the linear polarizer travels through the linear polarizer but light of which the direction is perpendicular to the linear polarizer is blocked
Implementation Method 4
the third electrode are used for generating an electric field with the second electrode at second frame scanning periods of image scanning to form a second grating
Data Source
AI summary
A liquid crystal grating panel, a stereo display device and a display method thereof are disclosed. The liquid crystal grating panel comprises an upper polarizer, an upper substrate, a lower substrate, a first electrode, a second electrode, a third electrode and liquid crystals; the third electrode is separated from the first electrode through an insulating layer; the liquid crystals are disposed between the upper substrate and the lower substrate; the first electrode is used for generating an electric field with the second electrode at first frame scanning periods of image scanning to form a first grating; and the third electrode is used for generating an electric field with the second electrode at second frame scanning periods of image scanning to form a second grating.