LCD Substrate Layout to Suppress Metal Reflection Noise
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Solution Overview
Problem
Existing display devices face issues with display quality due to reflection of light in metal layers, leading to noise recognition and misalignment problems, especially when external light incidence direction affects the boundary portions of exposure areas during manufacturing.
Innovation Solution
The display device incorporates an array substrate with signal lines and scan lines arranged in specific directions with spaces, a switching element, an organic insulating layer, and a metal layer that overlaps the organic insulating layer, along with a light-blocking layer extending along signal lines to prevent positional misalignment and reduce light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the boundary portion is divided into a plurality of small areas and exposed individually, then manufacturing precision is improved, but light reflection in metal layers increases causing noise recognition
Solution Approach 1:
The patent converts the harmful light reflection from metal layers into a beneficial effect by strategically positioning light-blocking layers. These blocking layers are placed to intercept reflected light at its source, transforming the potential noise problem into a controlled optical management solution that maintains both manufacturing precision and display quality
2Reliability
If a metal layer is provided to overlap the organic insulating layer, then electrical insulation is improved, but light reflection increases deteriorating display quality
Solution Approach 1:
The patent introduces light-blocking layers as intermediary elements between the light-emitting liquid crystal layer and the reflective metal layers. These intermediary layers serve dual purposes: they block harmful light reflection while allowing the metal layers to maintain their electrical insulation function, thus mediating between optical and electrical requirements
3Device complexity
If positional misalignment occurs in metal layer formation, then manufacturing complexity is reduced, but display quality deteriorates due to noise recognition
Solution Approach 1:
The patent applies preliminary action by pre-positioning light-blocking layers in strategic locations before final metal layer formation. This preliminary placement ensures that even if metal layers experience positional misalignment during manufacturing, the light-blocking layers are already in place to intercept reflected light and prevent noise recognition, thus simplifying the overall manufacturing process while maintaining display quality
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 enhances display quality by minimizing light reflection and noise recognition, maintaining image clarity regardless of external light direction, and reducing the impact of exposure misalignment on display performance.
Implementation Method 1
a liquid crystal layer including polymer-dispersed liquid crystals filled between the first light-transmitting substrate and the second light-transmitting substrate
Implementation Method 2
a light source disposed so as to emit light into a side surface of the array substrate or a side surface of the counter substrate
Data Source
AI summary
A display device includes: an array substrate; a counter substrate; a liquid crystal layer between the array substrate and the counter substrate; and a light source disposed so as to emit light into a side surface of the array substrate or a side surface of the counter substrate. The array substrate includes: signal lines arranged in a first direction with spaces interposed between the signal lines; scan lines arranged in a second direction with spaces interposed therebetween; a switching element coupled to a corresponding one of the scan lines and a corresponding one of the signal lines; an organic insulating layer that covers at least the switching element; and a metal layer provided on the upper side of the organic insulating layer so as to overlap the organic insulating layer. A positional misalignment portion of each signal line does not overlap a positional misalignment portion of the metal layer.