Liquid Crystal Display Storage Capacitor Vertical Stacking
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Solution Overview
Problem
Existing liquid crystal display apparatuses face challenges in maintaining stable electrostatic capacitance and ensuring sufficient light transmission due to the wide light shielding range caused by the extended storage capacitor bus line, which affects display quality and efficiency.
Innovation Solution
The display apparatus incorporates a liquid crystal layer with multiple domains of aligned liquid crystal molecules, a connection portion overlapping with the alignment boundary, and a capacitor forming portion partially overlapped with an insulating film, both extending along the alignment boundary with non-overlapping portions that switch positions to maintain consistent electrostatic capacitance and reduce light shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the extended portion of the CS bus line is made wider to absorb positional shifts, then manufacturing robustness is improved, but the light shielding range increases and light transmission is reduced
Solution Approach 1:
The invention transitions from a two-dimensional planar overlap structure to a three-dimensional stacked structure by introducing an insulating layer between the capacitor forming portion and the CS bus line. This vertical separation allows the conductive portions to be positioned in different layers (Z-dimension) while maintaining electrical connection, thereby reducing lateral light shielding while preserving capacitance function.
Solution Approach 2:
An insulating layer is introduced as an intermediary between the capacitor forming portion and the CS bus line. This insulating layer enables the two conductive elements to be positioned in close proximity for capacitance formation while preventing direct electrical contact and reducing lateral light shielding, thus mediating between electrical function and optical performance.
2Reliability
If the connection portion and capacitor forming portion are positioned to overlap, then electrostatic capacitance is formed, but the light shielding range increases
Solution Approach 1:
The invention positions the connection portion and capacitor forming portion in different vertical layers separated by an insulating layer. This three-dimensional arrangement allows electrostatic capacitance to be formed through vertical overlap while minimizing lateral light shielding, as the light-blocking conductive portions are separated in the Z-dimension rather than occupying the same planar space.
Solution Approach 2:
The insulating layer serves as a mediator that enables the connection portion and capacitor forming portion to be positioned in close vertical proximity for capacitance formation while preventing direct contact and reducing lateral light shielding. This intermediary layer allows simultaneous achievement of electrical function and optical performance.
3Manufacturing precision
If the extended portion of the CS bus line protrudes outwardly from both side edges, then positional shift absorption is improved, but the width increases and light shielding range becomes wide
Solution Approach 1:
The invention resolves the need for wide lateral protrusions by transitioning to vertical stacking. The capacitor forming portion is positioned in a different layer (Z-dimension) above the insulating layer, allowing capacitance formation and positional shift absorption without requiring the CS bus line to protrude widely in the lateral direction, thus simplifying the overall structure.
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 stabilizes electrostatic capacitance and narrows the light shielding range, enhancing display quality and efficiency by minimizing variations in capacitance and light transmission issues.
Implementation Method 1
a capacitor forming portion 27 that is arranged so as to be partially overlapped with a part of the connection portion 28 with an insulating film 19 in between and forms electrostatic capacitance between the capacitor forming portion 27 and the connection portion 28
Implementation Method 2
an alignment film 10E that aligns the liquid crystal molecules; a plurality of domains PXD that are different in alignment direction of the liquid crystal molecules
Data Source
AI summary
A display apparatus includes: a liquid crystal layer including liquid crystal molecules; a plurality of domains; an alignment boundary portion; an alignment film; a pixel electrode; a connection portion arranged to be overlapped with at least a part of the alignment boundary portion; and a capacitor forming portion that is arranged to be partially overlapped with a part of the connection portion with an insulating film in between and forms electrostatic capacitance. The connection portion and the capacitor forming portion extend along at least a part of the alignment boundary portion, have respective non-overlapping portions in which the connection portion and the capacitor forming portion are not overlapped with each other in a crossing direction crossing an extension direction of the connection portion and the capacitor forming portion, and arrangement of the non-overlapping portions in the crossing direction is switched between one side and another side in the extension direction.