Liquid Crystal Display Polarizer Plate Absorption Axis Inclination
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Solution Overview
Problem
Conventional liquid crystal displays (LCDs) face challenges in achieving high contrast ratios due to the fixed orientation of polarizer plates, which limits their viewing angle and image quality.
Innovation Solution
The method involves manufacturing polarizer plates with absorption axes inclined at specific angles (+0.10 to +0.20 degrees for the first plate and -0.04 to less than 0 or greater than 0 to +0.10 degrees for the second plate, using a polyvinyl alcohol film polarizer with protective tri-acetyl-cellulose films and a compensation film, to enhance contrast ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If polarizer plates are arranged with absorption axes at exactly 90 degrees (cross Nicol state), then the structure is simple and manufacturing is easy, but the contrast ratio is limited and cannot achieve optimal image quality
Solution Approach 1:
The patent changes the absorption axis inclination parameters of the polarizer plates from the conventional exactly 90 degrees (0 degree inclination) to specific non-zero inclination angles (first polarizer: +0.10 to +0.20 degrees, second polarizer: -0.04 to +0.10 degrees). This parameter optimization resolves the contradiction by achieving superior contrast ratio (5000:1 or higher) while maintaining a relatively simple structural configuration that is still manufacturable.
2Illumination intensity
If polarizer plates use fixed conventional orientation, then the design is simple and easy to manufacture, but the viewing angle and image quality are limited
Solution Approach 1:
The patent optimizes the absorption axis inclination parameters to specific ranges (first polarizer: +0.10 to +0.20 degrees, second polarizer: -0.04 to +0.10 degrees) to achieve superior light polarization quality and contrast ratio. This parameter optimization provides better viewing angle and image quality while remaining compatible with conventional polarizer manufacturing processes, thus balancing performance improvement with manufacturing ease.
3Illumination intensity
If polarizer plates are configured for optimal contrast ratio with inclined absorption axes, then image clarity and viewing angle improve, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise absorption axis inclination parameter ranges (first polarizer: +0.10 to +0.20 degrees, second polarizer: -0.04 to +0.10 degrees) to achieve optimal contrast ratio. These parameters represent an optimization balance that provides superior image quality while establishing clear manufacturing specifications that can be controlled within acceptable tolerances during production.
Solution Approach 2:
The patent establishes predetermined absorption axis inclination ranges that should be set during the polarizer plate manufacturing process. By specifying these parameters in advance as design requirements, the manufacturing process can be planned and controlled to achieve the desired precision, rather than attempting to adjust parameters after production.
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 significantly improves the contrast ratio of liquid crystal displays by optimizing the polarizer plate orientations, providing better light polarization and image clarity, especially in vertical arrangement mode liquid crystal panels.
Implementation Method 1
Each of the polarizer plates allows selective transmission of light traveling in a specific direction among light entering from a backlight unit and light passing through the liquid crystal layer, thereby achieving polarization.
Implementation Method 2
The liquid crystal display displays an image based on variation of arrangement of liquid crystal molecules in the liquid crystal layer upon application of an electric field to electrodes on the array substrate and the color filter substrate.
Data Source
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AI summary
The present disclosure provides a liquid crystal display and a method of manufacturing a polarizer plate. The liquid crystal display includes a liquid crystal panel, a first polarizer plate stacked on an upper surface of the liquid crystal panel, and a second polarizer plate stacked on a lower surface of the liquid crystal panel, wherein the first polarizer plate has an absorption axis inclination of +0.1 to +0.2 degrees or the second polarizer plate has an absorption axis inclination of -0.04 to less than 0 or greater than 0 to +0.1 degrees. The liquid crystal display may have a significantly improved contrast ratio through an optimal cutting process in manufacture of a polarizer plate.