Extinction Layer for Signal Line Light Reflection in Frameless Displays
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Solution Overview
Problem
In frameless display panels, the reflection of ambient light by metal signal lines reduces display contrast, affecting image quality due to the signal lines' proximity to the light exiting side.
Innovation Solution
An array substrate is designed with an extinction layer between the base substrate and the signal line, utilizing materials like amorphous silicon or semiconductor mixtures doped with amorphous silicon, and featuring protrusion structures to reduce ambient light reflection, with the extinction layer's thickness and pattern aligned with the signal line to minimize light entry and reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the array substrate is disposed in the upper layer to achieve narrow frame or frameless design, then the frame width is significantly narrowed, but ambient light reflects off the signal lines reducing display contrast
Solution Approach 1:
An extinction layer is introduced as an intermediary component between the signal line and the base substrate. This layer specifically targets and absorbs ambient light before it can reflect off the signal line, thereby resolving the contrast reduction issue while preserving the frameless design configuration
Solution Approach 2:
The extinction layer is selectively positioned only in regions where signal lines are located, rather than covering the entire substrate. This localized approach addresses the specific problem of signal line reflection without unnecessarily affecting other areas of the display panel
2Illumination intensity
If an extinction layer is added to reduce ambient light reflection, then display contrast is enhanced, but the device structure becomes more complex
Solution Approach 1:
The extinction layer is implemented as a thin film structure that can be integrated into the existing multi-layer substrate architecture. This thin-film approach adds the necessary light extinction function without significantly increasing overall device complexity or thickness
Solution Approach 2:
The extinction layer serves multiple functions simultaneously: it reduces ambient light reflection to enhance contrast, maintains optical transmittance for display quality, and can be integrated with existing manufacturing processes. This multi-functionality justifies the added structural element
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 effectively reduces ambient light entering the signal lines, enhancing display contrast and image quality while maintaining transmittance, thereby improving the overall display effect in frameless designs.
Implementation Method 1
an extinction layer disposed between the base substrate and the signal line, the extinction layer being configured to reduce an ambient light entering the signal line
Implementation Method 2
a plurality of protrusion structures are disposed on at least one surface of the extinction layer
Data Source
AI summary
An array substrate, a manufacturing method thereof, and a display device are provided. The array substrate includes: a base substrate, a signal line disposed on the base substrate, an extinction layer disposed between the base substrate and the signal line, the extinction layer being configured to reduce an ambient light when the array substrate is located on a light exiting side. An orthographic projection of the signal line in a plane of the base substrate is coincided with an orthographic projection of the extinction layer in the plane of the base substrate.