Source-Line Light Shielding Layout for Oblique-View Display Contrast
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Solution Overview
Problem
Display devices experience reduced contrast when viewed at an angle due to light reflection from the side surfaces of source lines, which is not effectively shielded by the light-shielding materials in the second substrate.
Innovation Solution
The implementation of a display device configuration where the first substrate includes insulating layers and light-shielding layers that overlap the source lines, and the second substrate has light-shielding materials with wider horizontal widths to effectively shield light reflections, improving contrast when viewed obliquely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light-shielding materials are placed only in the second substrate, then the structure is simple, but light reflection from source line side surfaces is not effectively shielded when viewed obliquely
Solution Approach 1:
The patent transitions from single-substrate light shielding to multi-layer light shielding across both first and second substrates. Light-shielding layers are added to the first substrate and light-shielding materials are added to the second substrate, creating a three-dimensional light shielding architecture that effectively blocks oblique light reflections while maintaining structural organization
Solution Approach 2:
The patent implements nested light-shielding layers within the substrate structure. The light-shielding layers in the first substrate and light-shielding materials in the second substrate are positioned to overlap and complement each other, creating a nested configuration that enhances light shielding effectiveness without significantly increasing overall device volume
2Object-affected harmful factors
If light-shielding layers are added to the first substrate and light-shielding materials are widened in the second substrate, then light reflection is effectively shielded, but device complexity increases
Solution Approach 1:
The patent applies light-shielding layers and materials specifically at locations where light reflection problems occur (around source lines and pixel electrodes). Rather than uniformly shielding the entire substrate, the light-shielding structures are localized to critical areas, effectively reducing light reflection while minimizing the increase in overall device complexity
Solution Approach 2:
The patent distributes light-shielding functions across multiple layers and substrates (first substrate light-shielding layers, second substrate light-shielding materials), creating a multi-dimensional light shielding system. This layered approach effectively shields light reflection while organizing complexity across different spatial dimensions rather than concentrating it in a single plane
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 the display quality by reducing stray light and improving contrast when viewed at an angle by effectively shielding light reflections from the source lines.
Implementation Method 1
Light emitted from the illumination device to the first substrate can be reflected by a side surface of the source line
Implementation Method 2
the light reflected by the side surface of the source line and the like, can be shielded by the light-shielding material of the second substrate
Data Source
AI summary
According to one embodiment, a display device includes, the first substrate including an insulating substrate, first and second light-shielding layers, a stacked layer film, first and second source lines, and a first insulating layer, the second substrate including first and second light-shielding materials. A first width of the first light-shielding layer along the first direction is equal to or greater than a second width of the first light-shielding material along the first direction, and a third width of the second light-shielding layer along the first direction is equal to or greater than a fourth width of the second light-shielding material along the first direction.