Viewing Angle Control Liquid Crystal Panel with Segmented Layers
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Solution Overview
Problem
Existing liquid crystal panels fail to effectively improve light blocking properties when viewed obliquely and achieve luminance uniformity within the panel surface in narrow viewing angle mode.
Innovation Solution
A viewing angle control liquid crystal panel configuration comprising three liquid crystal panels with specific electrode structures and polarizer arrangements, where the first, second, and third liquid crystal panels have controlled azimuth angles and drive voltages to achieve optimal light blocking and luminance uniformity, along with a negative C plate for enhanced light blocking performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single liquid crystal panel is used for viewing angle control, then the device complexity is reduced, but the light blocking property when viewed obliquely and luminance uniformity within the panel surface cannot be effectively improved
Solution Approach 1:
The patent divides the viewing angle control function into three separate liquid crystal panels (first, second, and third liquid crystal panels), each responsible for controlling light in specific viewing angle ranges. This segmentation allows each panel to be optimized independently for its specific function, improving overall light blocking performance without requiring a single complex panel design.
Solution Approach 2:
The patent introduces a third liquid crystal panel in addition to the traditional first and second panels, adding a new dimension to the viewing angle control system. This third panel specifically addresses oblique viewing angles, creating a more comprehensive control structure that improves light blocking properties across all viewing directions.
2Object-affected harmful factors
If the number of liquid crystal panels is increased to improve light blocking, then the light blocking property improves, but the device complexity increases
Solution Approach 1:
By segmenting the viewing angle control into three specialized panels, each panel can be designed with optimized electrode structures and alignment layers for its specific viewing angle range, achieving superior light blocking performance through functional specialization rather than increasing the complexity of a single panel.
Solution Approach 2:
Each liquid crystal panel is designed with local quality optimizations tailored to its specific function. The first panel optimizes for front viewing, the second for side viewing, and the third for oblique viewing, with each panel having customized electrode patterns and alignment characteristics to maximize its light blocking capability in its designated viewing angle range.
3Adaptability or versatility
If voltage is applied to liquid crystal molecules to change alignment state, then light transmission is controlled, but the viewing angle characteristic cannot be improved simultaneously in both narrow and wide ranges
Solution Approach 1:
The patent segments the viewing angle control into three independent liquid crystal panels, each optimized for specific viewing angle ranges. This allows the system to maintain reliable image observation quality in the designated range of each panel while providing adaptability across multiple viewing angles through the coordinated operation of all three panels.
Solution Approach 2:
The system dynamically switches between different liquid crystal panels based on the viewing angle. When a user views from a specific angle, the corresponding liquid crystal panel activates to provide optimal light blocking and image quality for that angle, while other panels remain inactive. This dynamic operation ensures reliable image observation quality across different viewing conditions.
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 solution achieves improved light blocking properties when viewed obliquely and maintains luminance uniformity within the panel surface in the narrow viewing angle mode, effectively switching between public and private modes.
Implementation Method 1
an amount of light transmitted is controlled by applying a voltage to a liquid crystal composition enclosed between a pair of substrates to change an alignment state of liquid crystal molecules in the liquid crystal composition according to the applied voltage
Implementation Method 2
a polarizer is provided on a light emitting side of the liquid crystal layer to transmit only light components parallel to a polarization axis of the linearly polarized light incident on the liquid crystal layer
Implementation Method 3
a negative C plate with a thickness direction retardation value of 350 nm or more and 1000 nm or less is provided between the first liquid crystal panel and the first polarizer and/or between the third liquid crystal panel and the second polarizer
Data Source
AI summary
A viewing angle control liquid crystal panel includes: a first polarizer having a first absorption axis; a first liquid crystal panel including a first substrate, a first liquid crystal layer, and a second substrate; a second liquid crystal panel including a third substrate, a second liquid crystal layer, and a fourth substrate; and a third liquid crystal panel including a fifth substrate, a third liquid crystal layer, and a sixth substrate. The following equations are satisfied, where φP1 is an azimuth angle of the first absorption axis and φ1, φ2, φ3, φ4, φ5, and φ6 are azimuth angles of directors of liquid crystal molecules on first, second, third, fourth, fifth, and sixth substrate sides:0°≤|φ1−φ2|≤5°0°≤|φP1−φ1|≤5°0°≤|φ3−φ4|≤5°0°≤|φ5−φ6|≤5°.