LCD Pixel Electrode Cut-Out Pattern and Light Shielding
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Solution Overview
Problem
In liquid crystal display apparatuses, conductive patterns on substrates can distort the electric field applied to liquid crystals, leading to poor image quality and alignment issues, as they interfere with the alignment of liquid crystals, causing image degradation.
Innovation Solution
The introduction of a cut-out pattern in the pixel electrode and a light blocking member positioned where conductive patterns overlap, which helps in maintaining the electric field integrity and preventing abnormal alignment of liquid crystals, thereby enhancing image quality and viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conductive patterns are provided on substrates to transmit signals, then signal transmission is enabled, but the electric field is distorted and liquid crystal alignment deteriorates
Solution Approach 1:
A light blocking member is introduced as an intermediary element positioned between the conductive pattern and the liquid crystal layer. This mediator blocks the harmful electric field distortion from the conductive pattern while allowing the conductive pattern to continue its signal transmission function, thus resolving the contradiction between signal transmission capability and liquid crystal alignment reliability
2Ease of manufacture
If conductive patterns are arranged on substrates, then electrical connections are established, but image quality is degraded due to electric field distortion
Solution Approach 1:
The light blocking member serves as a mediator that selectively blocks the electric field distortion from reaching the liquid crystal layer in regions where conductive patterns are present. This allows electrical connections to be maintained while preventing image quality degradation in the display regions
Solution Approach 2:
The light blocking member is strategically positioned only in specific regions where conductive patterns overlap with the liquid crystal layer, creating local protection zones. This localized approach maintains electrical connection functionality while improving image quality only where needed, rather than applying a blanket solution across the entire substrate
3Ease of manufacture
If conventional structures without cut-out patterns are used, then manufacturing is simpler, but electric field integrity is compromised
Solution Approach 1:
The pixel electrode is segmented by introducing cut-out patterns that remove portions of the electrode material. This segmentation allows the electric field to pass through the cut-out regions without being distorted by the conductive patterns, maintaining electric field integrity while adding only minimal manufacturing complexity through standard photolithography 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 improves the alignment of liquid crystals, widens the viewing angle, and maintains high-quality image display by shielding the electric field distortions caused by conductive patterns, ensuring better operational characteristics.
Implementation Method 1
Since the liquid crystals have dielectric anisotropy, the alignment of the liquid crystals changes when an electric field is applied thereto
Implementation Method 2
since the liquid crystals have refractive anisotropy, the light transmittance of the liquid crystal display apparatus varies according to the alignment state of the liquid crystals
Implementation Method 3
The light blocking member is arranged on one of the first substrate and the second substrate and is positioned corresponding to areas in which the cut-out pattern overlaps the conductive pattern within the pixel area
Data Source
AI summary
Disclosed is a liquid crystal display apparatus including a first substrate, a second substrate, and a liquid crystal layer interposed between the first substrate and the second substrate. A pixel area is defined on the first substrate. A pixel electrode includes a cut-out pattern and is formed in the pixel area. A conductive pattern is disposed between the first substrate and the pixel electrode, and partially overlaps the cut-out pattern when viewed from a plan view. A common electrode is disposed on the second substrate and includes a domain divider dividing the pixel area into a plurality of domains. A light blocking member is disposed on one of the first substrate and the second substrate, and is positioned corresponding to a portion of areas in which the cut-out pattern overlaps the conductive pattern within the pixel area.