LCD Cutout Angles for Pressure Wave Resistance
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Solution Overview
Problem
Liquid crystal displays face challenges in maintaining high resolution and transmittance due to external pressure-induced irregular behavior of liquid crystal molecules, which reduces aperture size and deteriorates backlighting efficiency.
Innovation Solution
The design features two field generating electrodes on a substrate with multiply-bent cutouts that prevent linear propagation of fluid pressure waves, using a basic unit cell structure of parallelograms and rectangles with specific angle configurations to inhibit irregular molecule behavior and maintain transmittance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cutouts are formed at angles to prevent fluid pressure wave propagation, then irregular behavior of liquid crystal molecules is reduced, but aperture size is reduced and transmittance is deteriorated
Solution Approach 1:
The patent applies parameter changes by optimizing the angles of cutouts (first angle between 10-30 degrees, second angle between 60-80 degrees) and their dimensional ratios to achieve the optimal balance between preventing pressure wave propagation and maintaining aperture transmittance
Solution Approach 2:
The patent employs asymmetry by forming cutouts with two different angles (first angle and second angle) instead of symmetric configurations, creating an asymmetric pattern that effectively blocks fluid pressure waves while preserving light transmittance characteristics
2Measurement precision
If resolution is increased by decreasing pixel area size, then display quality is improved, but aperture transmittance factor is deteriorated
Solution Approach 1:
The patent optimizes the geometric parameters of cutouts including their angles and dimensional ratios to maximize the aperture opening area within the constrained pixel area, thereby maintaining high transmittance even at high resolution densities of 200 PPI or more
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 allows for high-resolution displays (200 PPI or more) with reduced degradation from external pressures, enhancing backlighting transmittance and preventing bruising phenomena, thereby maintaining image quality and efficiency.
Implementation Method 1
if a fluidic pressure wave is generated in one of the cutouts, for example due to impact applied from the outside of the liquid crystal display, the wave spreads easily along the channel of a straight cutout
Implementation Method 2
adjusting magnitude of a transmitted therethrough light by applying a voltage between electrodes so as to rearrange liquid crystal molecules of a liquid crystal layer and thus impart desired optical effects (e.g., modulated polarity) to the transmitted through light
Data Source
AI summary
A liquid crystal display includes a first substrate, a gate line disposed on the first substrate and extending parallel to a major horizontal reference line of the display, and a plurality of pixel unit cells disposed on and tesslating a display area of the first substrate where each unit cell includes a first field generating electrode and a second field generating electrode with an insulating layer interposed therebetween, wherein a first one of the first and second field generating electrodes has a plurality of cutouts defined therein for producing corresponding liquid crystal domains, the plurality of cutouts each including a first inclined edge portion forming a first angle with the vertical reference line and a second inclined edge portion forming a second angle with the vertical reference line that is different from the first angle.