Liquid Crystal Panel Warpage Control via Polarizer Dimensional Change Ratios
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display apparatuses experience significant light leakage from the peripheral portions of the screen, especially in high humidity environments, leading to poor display uniformity, particularly in larger screens.
Innovation Solution
The use of polarizing plates with adjusted dimensional change ratios on both sides of the liquid crystal cell, where the first polarizing plate has a larger dimensional change ratio than the second, helps to suppress warpage and reduce light leakage, ensuring better display uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional liquid crystal panels are used in high humidity environments, then the device can operate, but light leakage occurs from peripheral portions of the screen
Solution Approach 1:
The patent applies parameter changes by adjusting the dimensional change ratios of the polarizing plates. Specifically, the first polarizing plate is designed with a dimensional change ratio of 0.01% to 0.06%, while the second polarizing plate has a dimensional change ratio of 0.02% to 0.07%. This parameter optimization prevents warpage of the liquid crystal cell in high humidity environments, thereby eliminating light leakage and maintaining display uniformity.
2Area of stationary object
If the screen size is enlarged, then the display area increases, but light leakage becomes more serious
Solution Approach 1:
The patent addresses the light leakage issue in large screens through parameter changes in the polarizing plates. By optimizing the dimensional change ratios (first plate: 0.01%-0.06%, second plate: 0.02%-0.07%), the liquid crystal cell maintains its flatness even in large screen configurations, preventing the warpage-induced light leakage that typically worsens with increased screen area.
3Manufacturing precision
If polarizing plates with different dimensional change ratios are used, then warpage is suppressed and display uniformity improves, but the device complexity increases
Solution Approach 1:
The patent resolves the contradiction between manufacturing precision and device complexity by implementing parameter changes within existing component types. Instead of introducing fundamentally new structures, the invention optimizes the dimensional change ratios of conventional polarizing plates (first plate: 0.01%-0.06%, second plate: 0.02%-0.07%), achieving improved display uniformity while maintaining compatibility with standard manufacturing processes.
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 effectively minimizes light leakage and enhances display uniformity, even in high humidity conditions, by controlling the curvature of the liquid crystal cell and maintaining optical properties.
Implementation Method 1
A dimensional change ratio (C1) of the first polarizing plate is larger than a dimensional change ratio (C2) of the second polarizing plate
Data Source
AI summary
There is provided a liquid crystal panel and a liquid crystal display apparatus in which light leakage occurring from a peripheral portion of a screen is small, and which has excellent display uniformity in a high humidity environment.A liquid crystal panel according to an embodiment of the present invention includes: a liquid crystal cell; a first polarizing plate placed on a viewer side of the liquid crystal cell; and a second polarizing plate placed on an opposite side of the viewer side of the liquid crystal cell, wherein a dimensional change ratio (C1) of the first polarizing plate is larger than a dimensional change ratio (C2) of the second polarizing plate.