Display Device Common Electrode Overlap for Data Line Repair
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Solution Overview
Problem
Liquid crystal display devices face signal interruption due to broken data lines, which compromises display quality without a solution that maintains transmittance.
Innovation Solution
A display device design featuring a common electrode with an end part overlapping partially with data lines, allowing for signal reparation, and angularly arranged pixel electrodes to enhance transmittance by optimizing the angles between electrode components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If data lines are made thin to improve transmittance, then transmittance is improved, but the data lines become more prone to breakage
Solution Approach 1:
The common electrode is designed with an extended end part that overlaps with the data line before any breakage occurs. This preliminary structural arrangement enables future repair actions by providing a pre-positioned electrical connection point that can restore signal transmission after data line breakage, without requiring additional manufacturing steps or complex repair procedures.
Solution Approach 2:
The end part of the common electrode serves as an intermediary element between the scan line and the data line. When the data line breaks, the end part of the common electrode provides an alternative electrical pathway that mediates the signal transmission, allowing the pixel to continue receiving control signals through the scan line via the common electrode's overlapping section.
2Reliability
If the common electrode is extended to overlap data lines for repair capability, then reliability is improved, but device complexity increases
Solution Approach 1:
The end part of the common electrode performs multiple functions: it serves as part of the common electrode structure for electrical connection, acts as a repair mechanism for broken data lines, and maintains the liquid crystal alignment function. This multi-functionality reduces the need for separate repair structures, thereby limiting the increase in device complexity while improving reliability.
Solution Approach 2:
The repair function is merged with the common electrode structure itself. Instead of adding a separate repair electrode or complex routing system, the common electrode is simply extended to overlap with the data line, combining the common electrode's electrical function with the data line repair function in a single integrated structure.
3Illumination intensity
If pixel electrodes are arranged at angles to improve transmittance, then transmittance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The pixel electrodes are arranged in an asymmetric angular pattern rather than a symmetric grid. Specifically, the first pixel electrode extends in a first direction and the second pixel electrode extends in a second direction that is not parallel to the first direction, creating an asymmetric layout that optimizes light transmission paths while the patent provides specific angular relationships to guide manufacturing.
Solution Approach 2:
The patent specifies angular parameters for the pixel electrode arrangement (first direction and second direction that is not parallel) to optimize transmittance. By defining specific angular relationships rather than arbitrary orientations, the patent provides manufacturable parameters that balance the need for angular arrangement with manufacturing precision requirements.
Data Source
AI summary
A display device is disclosed, which includes: a first substrate; a plurality of scan lines and a plurality of data lines, wherein the plurality of scan lines intersects with the plurality of data lines, the plurality of scan lines and the plurality of data lines are disposed above the first substrate, and the plurality of scan lines extend along a first direction; a common electrode disposed above the first substrate, wherein the common electrode has a first part extending along the first direction, a second part substantially parallels to the one of the plurality of data lines, and the first part connects to the second part.