Segment LCD Electrode Openings for Uniform Brightness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Segment-type liquid crystal display apparatuses face issues with electrode disconnection and increased electrical resistance due to the limited distribution of openings on electrodes, leading to display unevenness and brightness variations across different segments.
Innovation Solution
The design incorporates a first electrode with rectangular openings and a second electrode with T-shaped, inverted T-shaped, or cruciform openings, where the second electrode has cyclically disposed rectangular regions that increase its surface area, while the first electrode has simpler rectangular openings, reducing the likelihood of disconnection and resistance increase by controlling the orientation domains and viewing angle dependency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If openings are provided only to display part sections of electrodes, then electrode disconnection is prevented, but electrical resistance increases and display unevenness occurs
Solution Approach 1:
The electrode openings are segmented into two types: first openings in the display part and second openings in the non-display part (lead wiring and external extraction electrode areas). This segmentation allows different opening configurations in different functional zones, preventing disconnection in critical areas while maintaining display uniformity in the display part.
Solution Approach 2:
Different opening structures are applied to different locations: the display part has first openings with specific dimensions and patterns, while the non-display part has second openings with different dimensions and patterns. This local differentiation optimizes each zone for its specific function, ensuring both reliability and display quality.
2Device complexity
If segment electrodes are made into outline shapes to define display parts, then display structure is simplified, but electrode disconnection and resistance increase occur more readily
Solution Approach 1:
The electrode is segmented into display part sections and non-display part sections (lead wirings and external extraction electrodes). Openings are selectively provided in both sections, preventing the continuous thin outline structure that is prone to disconnection while maintaining the simplified outline shape for display definition.
Solution Approach 2:
The solution adds a dimensional aspect by extending openings not only in the display part but also in the non-display part (lead wiring and external extraction electrode areas). This three-dimensional electrode structure with openings in multiple zones enhances reliability without significantly increasing planar complexity.
3Manufacturing precision
If openings are increased in number and distribution, then electrical resistance decreases, but electrode disconnection risk increases
Solution Approach 1:
The openings are segmented into first openings (display part) and second openings (non-display part), with each type having optimized dimensions and patterns. This segmentation allows the display part to have sufficient openings for uniformity while the non-display part has openings configured to minimize disconnection risk in critical connection areas.
Solution Approach 2:
Different opening densities and patterns are applied locally: the display part has openings configured for optimal display uniformity, while the lead wiring and external extraction electrode areas have openings configured to maintain structural integrity and minimize disconnection risk in these critical connection zones.
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 prevents electrode disconnection and reduces electrical resistance, ensuring consistent brightness across segments by controlling the surface area and orientation of electrodes, thereby enhancing the reliability and performance of segment-type liquid crystal display apparatuses.
Implementation Method 1
a liquid crystal layer disposed between the first substrate and the second substrate
Data Source
AI summary
The apparatus comprises a first and a second substrate disposed facing each other, a first electrode comprising first openings provided to the first substrate, a second electrode comprising second openings provided to the second substrate, and a liquid crystal layer disposed between the first and the second substrate. A display part is defined in a region where the first and the second electrode overlap, each of the first openings is formed into a rectangular shape in the planar view, each of the second openings is formed into a rectangular shape or cruciform shape in the planar view, the second electrode comprises rectangular regions cyclically disposed inside the display part in the planar view, the four sides that define each of the rectangular regions respectively contact any portion of the second openings, and each of the first openings is disposed overlapping any of the rectangular sections in the planar view.