Alternating Electrode Gaps for LCD Side Visibility
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Solution Overview
Problem
Liquid crystal display (LCD) devices face challenges in achieving improved side visibility and display quality, particularly due to distortions in side visibility that existing methods have not adequately addressed.
Innovation Solution
A display device design featuring a first and second substrate with alternating electrode extensions and different electrode gaps, where liquid crystal molecules are vertically aligned when no electric field is formed, allowing for varied voltage applications to control transmittance and improve side visibility through the use of specific electrode gap configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional liquid crystal display modes are used, then the display can operate with standard electrode configurations, but side visibility is distorted and viewing angle is limited
Solution Approach 1:
The electrode structure is segmented into multiple distinct regions: first electrode extensions, second electrode extensions, first electrode gaps, and second electrode gaps. Each segment serves a specific function in controlling light transmittance from different viewing angles. The segmentation allows independent optimization of each region's properties to improve side visibility without requiring complete redesign of the entire electrode system.
Solution Approach 2:
Different regions of the electrode structure are assigned different properties: the first electrode gaps have different dimensions than the second electrode gaps, creating local variations in electrical field distribution. This local quality differentiation enables optimized light control for specific viewing angles while maintaining standard operation in other regions, thereby improving side visibility without excessive overall complexity.
2Illumination intensity
If electrode gaps are made smaller to improve transmittance, then voltage-transmittance performance improves, but manufacturing precision requirements increase
Solution Approach 1:
The electrode gap structure is divided into two distinct types (first electrode gaps and second electrode gaps) with different dimensions. This segmentation allows the design to achieve effective small gap dimensions in critical regions for improved transmittance while maintaining larger, more easily manufactured gap dimensions in other regions, thereby balancing performance with manufacturability.
Solution Approach 2:
The patent employs different dimensional parameters for different electrode gaps - specifically, the first electrode gaps have different width and/or length dimensions compared to the second electrode gaps. This parameter variation enables optimization of the voltage-transmittance characteristics by creating regions with smaller effective gaps where needed, while avoiding the need for uniformly small gaps throughout the entire electrode structure, thus reducing overall manufacturing precision requirements.
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 enhances side visibility and display quality by varying the electrode gaps and voltage applications, resulting in improved transmittance and reduced distortion, as demonstrated by the voltage-transmittance graph showing increased transmittance with shorter electrode gaps.
Implementation Method 1
the liquid crystal molecules are aligned vertically to the first and the second substrate, when the electric field is not formed between the first and the second substrate
Implementation Method 2
When a voltage is applied to the electrodes, the electric field is generated and the liquid crystal molecules are re-arranged
Implementation Method 3
The polarizers and liquid crystal molecules control the transmittance of the light to display images
Data Source
AI summary
A display device includes a first substrate, a first electrode comprising first electrode extensions formed on the first substrate, a second electrode comprising second electrode extensions formed on the first substrate and arranged alternately with the first electrode extensions, a second substrate facing the first substrate, liquid crystal molecules interposed between the first substrate and the second substrate, wherein electrode gaps formed between the first electrode extensions and the second electrode extensions comprise first electrode gaps and second electrode gaps, and the first electrode gaps are different from the second electrode gaps, and wherein the liquid crystal molecules are aligned vertically to the first and the second substrate, when the electric field is not formed between the first and the second substrate.