Light Blocking Pattern Spacing for Display Reflection Control
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Solution Overview
Problem
Display devices face challenges in reducing external light reflection while maintaining image luminance, as traditional polarizing plates lower luminance and existing anti-reflection solutions are inadequate.
Innovation Solution
A display device design incorporating a light blocking pattern with specific spacing and refractive index considerations, where the light blocking pattern is positioned over conductive patterns on insulating layers, effectively reducing external light reflection without compromising luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizing plate is used to reduce external light reflection, then the reflectance of external light is reduced, but the luminance of the image is lowered
Solution Approach 1:
The invention divides the anti-reflection function into multiple segments: a light blocking pattern layer with specific spacing and a refractive index control layer. This segmentation allows the light blocking pattern to reduce reflection while the refractive index control layer maintains luminance by optimizing light transmission, thereby resolving the contradiction between reflection reduction and luminance maintenance
Solution Approach 2:
The light blocking pattern is applied locally to specific regions (non-light-emitting regions) rather than uniformly across the entire display. By controlling the local reflectance at edges and interfaces where reflection problems occur most, the invention reduces overall reflection without significantly impacting the luminance of light-emitting regions
2Object-affected harmful factors
If a light blocking pattern is positioned close to the conductive pattern to reduce reflection, then reflection reduction is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The invention optimizes the spacing parameter L between the light blocking pattern and conductive pattern based on the refractive index T and n1 of the insulating layer, using the relationship L = T/(2*n1) to achieve effective reflection reduction. By establishing this mathematical relationship, the invention converts a complex positioning problem into a calculable parameter optimization, reducing manufacturing precision requirements while maintaining effectiveness
Solution Approach 2:
The insulating layer serves as an intermediary between the light blocking pattern and the conductive pattern. Its refractive index properties mediate the optical interaction, allowing the light blocking pattern to function effectively at a controlled distance from the conductive pattern without requiring direct contact or extremely tight spacing tolerances
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 significantly reduces external light reflection while maintaining or enhancing image luminance by strategically positioning the light blocking pattern over conductive patterns on insulating layers, adhering to specific geometric and refractive index-based criteria.
Implementation Method 1
a light blocking pattern overlapping the first conductive pattern and disposed on the insulating layer, an edge of the light blocking pattern being spaced apart from an edge of the first conductive pattern at a first distance when viewed in a plan view... where L represents the first distance, T represents a thickness of the insulating layer measured at the edge of the light blocking pattern, and n1 represents a refractive index of the insulating layer
Data Source
AI summary
A display device includes a display panel, an input sensor, a light blocking pattern, and a window. A distance between an edge of the light blocking pattern and an edge of a first conductive pattern of the input sensor satisfies Formula below:L≥T×tan(arcsin(1n1×sin90°))where L represents the distance, T is a thickness of an insulating layer disposed on the upper side of the light blocking pattern, and n1 is a refractive index. The thickness is measured at the edge of the light blocking pattern.