LCD Shield Layer Oblique Field Control
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Solution Overview
Problem
Conventional liquid crystal display devices face challenges in achieving high transmittance and resolution while maintaining a high contrast ratio and preventing display quality deterioration, particularly due to issues with electric field leakage and alignment of liquid crystal molecules.
Innovation Solution
The liquid crystal display device employs a configuration with a pixel electrode and a common electrode forming an oblique electric field, utilizing a shield layer and retention capacity to control the electric field and alignment, thereby increasing the inter-electrode distance and preventing electric field leakage, which enhances transmittance and resolution without compromising contrast ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the inter-electrode distance is increased to prevent electric field leakage, then transmittance and resolution are improved, but the contrast ratio may deteriorate
Solution Approach 1:
A shield layer is introduced as an intermediary component between the pixel electrode and common electrode. This shield layer acts as a mediator that confines the electric field to the desired region, preventing leakage while allowing increased inter-electrode distance for improved resolution and transmittance without compromising contrast ratio
Solution Approach 2:
The shield layer is strategically positioned at specific locations where electric field leakage occurs. By applying local modifications only where needed rather than uniformly across the entire electrode structure, the patent achieves field confinement without unnecessarily reducing overall transmittance or affecting contrast ratio
2Illumination intensity
If the inter-electrode distance is increased to improve transmittance, then resolution is improved, but the contrast ratio may deteriorate
Solution Approach 1:
The shield layer serves as a mediator that enables increased inter-electrode distance for improved transmittance while preventing electric field leakage that would otherwise compromise contrast ratio
Solution Approach 2:
The electrode structure is segmented into distinct functional regions: the pixel electrode, the shield layer, and the common electrode. This segmentation allows independent optimization of each component's position and dimensions to simultaneously achieve high transmittance and maintained contrast ratio
3Manufacturing precision
If the electric field is optimized for alignment, then liquid crystal molecule alignment is improved, but display quality may deteriorate due to leakage
Solution Approach 1:
The shield layer acts as a mediator that confines the electric field to the region between the pixel electrode and common electrode, ensuring proper liquid crystal molecule alignment while preventing field leakage that would compromise display quality
Solution Approach 2:
The shield layer is designed in advance to preemptively prevent electric field leakage before it can affect display quality. By positioning the shield layer strategically, the patent counteracts potential leakage effects before they can degrade alignment or display performance
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 achieves improved transmittance and resolution by optimizing the electric field distribution and alignment of liquid crystal molecules, reducing the risk of display quality deterioration and allowing for various pixel pitches without compromising color reproduction or contrast ratio.
Implementation Method 1
switches a liquid crystal molecule by a lateral electric field substantially parallel to the main surface of the array substrate
Implementation Method 2
a liquid crystal layer comprising liquid crystal molecules held between the first substrate and the second substrate
Data Source
AI summary
According to one embodiment, a device includes a first substrate including a gate line, a source line which extends to intersect with the gate line, a pixel electrode which includes a primary pixel electrode extending substantially parallel to the source line, and a switching element located at the intersection of the gate line and the source line, a second substrate includes a common electrode which extends substantially parallel to the primary pixel electrode on both sides across the primary pixel electrode, and a liquid crystal layer including liquid crystal molecules held between the first and second substrates. The switching element includes a drain line which is electrically connected to the pixel electrode and which is located to overlap the gate line.