Array Substrate Signal Lines with Light Absorbing Layer
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Solution Overview
Problem
Liquid Crystal Display (LCD) devices face reduced display effect due to high light reflectance from metal signal lines and pixel driving circuits on the display surface, leading to compromised display contrast and visibility.
Innovation Solution
An array substrate design featuring signal lines with a light absorbing layer and a metal layer stacked in a direction away from the base, where the light absorbing layer, made of materials like molybdenum oxide, effectively reduces ambient light reflection, and conductive connecting lines ensure accurate signal transmission to common electrodes, while maintaining low reflectance and high signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal signal lines and pixel driving circuits are used on the display surface, then electrical conductivity and signal transmission are improved, but light reflectance increases leading to reduced display contrast and visibility
Solution Approach 1:
The patent applies composite materials by stacking a light absorbing layer (made of molybdenum oxide or similar materials) over the metal layer in signal lines. This composite structure combines the high electrical conductivity of metal with the light-absorbing properties of the oxide layer, thereby maintaining signal transmission reliability while reducing light reflectance and improving display contrast.
Solution Approach 2:
The patent implements local quality by selectively applying the light absorbing layer only to specific signal lines that are visible on the display surface, while maintaining the metal layer's conductivity function. The light absorbing layer is positioned locally where it can absorb reflected light without interfering with the electrical function of the signal lines, thus addressing the reflectance issue in specific critical areas.
2Object-affected harmful factors
If a light absorbing layer is added to signal lines, then light reflectance is reduced and display contrast is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent merges the light absorbing layer formation with the existing signal line manufacturing process. The light absorbing layer is deposited as part of the same fabrication sequence as the metal layer, using standard thin-film deposition techniques. This integration approach adds minimal steps to the overall manufacturing process while achieving the desired light-absorbing effect.
3Reliability
If conductive connecting lines are added to connect common electrodes and metal layers, then signal transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent introduces conductive connecting lines as intermediary elements that bridge the common electrode and the metal layer in the signal line. These connecting lines serve as mediators to ensure reliable electrical connection between the two components, enabling proper signal transmission while maintaining the functional separation and optical performance of the display 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
The solution enhances display contrast and clarity by minimizing ambient light reflection and ensuring reliable signal transmission, enabling better display performance with reduced bezel width or bezel-free LCD devices.
Implementation Method 1
a light absorbing layer and a metal layer that are stacked in a direction away from the base... Conductivity of the light absorbing layer is less than conductivity of molybdenum
Data Source
AI summary
An array substrate includes a base, at least one common electrode, at least one signal line and at least one conductive connecting line. The at least one common electrode is formed on the base, and a signal line arranged correspondingly to each of the at least one common electrode is formed on the base. The signal line includes a light absorbing layer and a metal layer that are stacked in a direction away from the base. Conductivity of the light absorbing layer is less than conductivity of molybdenum. Each of the at least one conductive connecting line is electrically connected to both a common electrode and a metal layer in the corresponding signal line.