Pseudo-Reflection Pattern Layout for Brighter Touch Displays
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Solution Overview
Problem
Display devices face challenges in improving luminous efficiency, particularly in areas with component holes where protective layers are formed, leading to potential light blockage and reduced luminance.
Innovation Solution
The display device incorporates a pseudo-reflection pattern formed of a low-temperature curable photosensitive resin composition, which is used to form a connection electrode without a mask, ensuring it does not overlap sub-pixels and includes a touch contact hole for connection, thereby enhancing light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective layer is formed in the component hole to protect mounted components, then component protection is improved, but light blockage increases and luminance decreases
Solution Approach 1:
The protective layer is designed with a tapered structure where the width at the first surface is greater than the width at the second surface. This local variation in geometry allows the upper portion to provide adequate protection for components while the lower portion maintains light transmission pathways, thus protecting components without significantly blocking light.
2Reliability
If the connection electrode width is increased to ensure electrical connection reliability, then connection reliability is improved, but light transmission area is reduced and luminous efficiency decreases
Solution Approach 1:
The connection electrode is designed with a tapered structure transitioning from a wider first surface to a narrower second surface. This dimensional variation allows the electrode to provide sufficient electrical connection area at the upper level while minimizing the blockage of light transmission pathways at the lower level, thus maintaining luminous efficiency while ensuring connection reliability.
3Manufacturing precision
If a mask is used to form the connection electrode pattern precisely, then manufacturing precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The connection electrode pattern is formed by directly depositing or forming material on the inclined surface of the protective layer. The inclined surface geometry naturally guides the material deposition to create the desired tapered electrode structure without requiring additional masking steps. This self-forming mechanism achieves precise patterning while simplifying the manufacturing process.
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 improves light efficiency by allowing light to pass through component holes without obstruction, maintaining luminance and enhancing the display's overall brightness.
Implementation Method 1
a pseudo-reflection pattern formed of a low-temperature curable photosensitive resin composition
Data Source
AI summary
A display device, includes: a light emitting element layer including a sub-pixel and a pixel defining film defining the sub-pixel; a thin film encapsulation layer on the light emitting element layer; a pseudo-reflection pattern overlapping the pixel defining film and formed on the thin film encapsulation film; a connection electrode on the pseudo-reflection pattern; a second touch insulating layer on the connection electrode; and a driving electrode and a sensing electrode on the second touch insulating layer, wherein a width of the connection electrode is greater than a width of the driving electrode.