Display Panel Light Shielding and Filter Layer for Reflection Reduction
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Solution Overview
Problem
Existing display panels face challenges in reducing external light reflection, which degrades the visibility of images displayed, especially in outdoor environments with sufficient external light.
Innovation Solution
The display panel incorporates a light shielding layer and a filter layer on the upper display substrate, with the filter layer having a different color than the light shielding layer and overlapping the sealing member in the non-display area, to absorb external light and reduce reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light shielding layer is added to block external light, then external light reflection is reduced, but the device structure becomes more complex
Solution Approach 1:
The patent applies composite materials by combining a light shielding layer with a filter layer that has a different color than the light shielding layer. This composite structure reduces external light reflection more effectively than a single layer, while the layers are integrated into the existing display substrate structure to minimize complexity increase.
Solution Approach 2:
The filter layer is selectively applied in specific regions of the display panel, particularly in the non-display area surrounding the display area. This localized approach reduces external light reflection where it most impacts visibility without adding complexity to the entire display structure.
2Loss of information
If multiple layers are added to reduce reflection, then visibility is improved, but manufacturing complexity increases
Solution Approach 1:
The light reflection reduction function is segmented into two distinct layers: a light shielding layer and a filter layer with different color properties. Each layer performs a specific function, allowing for specialized manufacturing processes for each layer while maintaining overall visibility improvement.
Solution Approach 2:
The patent changes the optical parameters of the layers by using a filter layer with a color different from the light shielding layer. This parameter differentiation allows each layer to target specific wavelengths of external light, improving visibility while enabling manufacturing through standard colored coating processes.
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 effectively reduces external light reflection, enhancing the visibility of images displayed on the panel by minimizing the impact of external light on the display surface.
Implementation Method 1
a light shielding layer including a first portion which corresponds to the display area and a second portion which corresponds to the non-display area
Implementation Method 2
a filter layer which is in the non-display area, the filter layer having a color different from a color of the second portion of the light shielding layer
Implementation Method 3
a filter layer which is in the non-display area, the filter layer having a color different from a color of the second portion of the light shielding layer and overlapping the sealing member
Data Source
AI summary
A display panel includes an upper substrate to which external light is incident, a sealing member which is in a non-display area and couples the upper substrate to a lower display substrate. The upper display substrate includes: a base substrate; a light shielding layer and filter layer each corresponding to the non-display area and absorbing a portion of external light which is transmitted through the base substrate at the non-display area, the filter layer and the light shielding layer having different colors from each other. In a first non-display area of the base substrate which corresponds to the sealing member, only one among the filter layer and the light shielding layer is disposed. In a second non-display area of the base substrate which is adjacent to the first non-display area, both the filter layer and the light shielding layer are disposed.