Liquid Crystal Grating Electrode Design for Black Stripe Reduction
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Solution Overview
Problem
The existing liquid crystal grating technology results in a poor display effect due to a large included angle between the electric field direction and the liquid crystal molecule arrangement, leading to low light transmittance and the formation of black stripes, which affects the 3D display performance.
Innovation Solution
The introduction of third strip-shaped transparent electrodes on the second substrate, which are provided at intervals and have the same voltage as the plate-shaped transparent electrode but different from the first strip-shaped transparent electrodes, helps to offset the electric field forces and reduce the deflection of liquid crystal molecules, thereby minimizing the black stripe effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wide strip-shaped transparent electrodes and plate-shaped transparent electrodes are used to form the liquid crystal grating, then the 3D display effect is achieved, but black stripes appear due to liquid crystal molecule deflection outside the electrode edges
Solution Approach 1:
The patent introduces a third transparent conductive layer with strip-shaped transparent electrodes that are segmented and arranged at specific intervals. These electrodes divide the electric field distribution into distinct regions, creating a more controlled electric field pattern that prevents liquid crystal molecule deflection at electrode edges, thereby eliminating black stripes while maintaining the 3D display effect.
Solution Approach 2:
The patent applies different electrode configurations to different regions of the display. The third transparent conductive layer with strip-shaped electrodes is specifically positioned at intervals to address the local problem of black stripe formation at electrode edges, while the overall electrode structure maintains the global 3D display functionality. This localized modification improves display quality without compromising the overall system.
2Reliability
If the electric field direction has a large included angle with the liquid crystal molecule arrangement direction, then the liquid crystal molecules are deflected, but light transmittance decreases and display brightness is reduced
Solution Approach 1:
The patent introduces a third transparent conductive layer that creates additional equipotential regions within the liquid crystal layer. By arranging strip-shaped transparent electrodes at specific intervals in this third layer, the electric field distribution is optimized to reduce the included angle between the electric field direction and liquid crystal molecule arrangement direction. This minimizes unnecessary liquid crystal molecule deflection and improves light transmittance, thereby enhancing display brightness while maintaining reliable molecule control.
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 configuration improves light transmittance and display brightness by reducing the influence of the electric field on liquid crystal molecules outside the edge of the electrodes, enhancing the overall display effect of the 3D image.
Implementation Method 1
A second transparent conductive layer, a transparent insulating layer and a first transparent conductive layer are sequentially provided on the second substrate
Implementation Method 2
In the case that there is an electric field between the wide strip-shaped transparent electrodes 5′ and the plate-shaped transparent electrode 7′, liquid crystal molecules in the liquid crystal layer 3′ corresponding to positions of the wide strip-shaped transparent electrodes 5′ are deflected
Implementation Method 3
liquid crystal molecules in the liquid crystal layer 3′ corresponding to positions of the wide strip-shaped transparent electrodes 5′ are deflected. That is, in this case, the liquid crystal molecules in the liquid crystal layer 3′ corresponding to the positions of the wide strip-shaped transparent electrodes 5′ are deflected so that long axes thereof are perpendicular to the second substrate 4′ and light cannot transmit through the liquid crystal grating 1′
Data Source
AI summary
A liquid crystal grating and a fabrication method thereof, and a display device are provided. The liquid crystal grating comprises a first substrate (1) and a second substrate (2) provided opposite to each other, and a liquid crystal layer (7); a plate-shaped transparent substrate (3) is provided on the first substrate (1), and a second transparent conductive layer (4), a transparent insulating layer (5) and a first transparent conductive layer (6) are sequentially provided on the second substrate (2); the first transparent conductive layer (6) includes first strip-shaped transparent electrodes (61) and second strip-shaped transparent electrodes (62) which are alternately provided, and there is a gap between the first strip-shaped transparent electrode (61) and the second strip-shaped transparent electrode (62) adjacent to each other; and the second transparent conductive layer (4) includes third strip-shaped transparent electrodes (41) provided at intervals. The liquid crystal grating reduces a black stripe.