Flexible Digitizer with Light-Absorbing Insulating Layer
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Solution Overview
Problem
Existing display devices with touch input capabilities using styluses face challenges in achieving flexibility and minimizing the visibility of digitizer patterns, which can affect image quality and user experience.
Innovation Solution
A display device design that incorporates a digitizer with a flexible base layer, circuit patterns on both surfaces, and insulating layers, including a light-absorbing material to reduce pattern visibility, along with a coupling layer for improved flexibility and integration with a display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid digitizer structure is used to ensure pattern visibility and structural stability, then manufacturing precision is improved, but flexibility and adaptability to curved surfaces deteriorate
Solution Approach 1:
The patent employs a flexible base layer as the foundation of the digitizer structure, allowing the entire assembly to conform to curved or flexible display surfaces while maintaining the integrity and precision of the circuit patterns. This flexible substrate enables the digitizer to adapt to various form factors without compromising manufacturing precision.
Solution Approach 2:
The digitizer utilizes a composite structure combining flexible base layer, circuit patterns, insulating layers, and light-absorbing materials. This multi-layer composite design achieves both flexibility from the base layer and pattern precision through the structured arrangement of subsequent layers, resolving the contradiction between adaptability and manufacturing precision.
2Illumination intensity
If light-absorbing materials are added to the insulating layer to reduce pattern visibility, then image quality is improved, but device complexity increases
Solution Approach 1:
The patent integrates light-absorbing materials directly into the insulating layer of the digitizer structure, combining two functions (insulation and light absorption) into a single layer. This merging approach reduces the need for separate components, thereby improving image quality by reducing pattern visibility while minimizing the increase in device complexity.
Solution Approach 2:
The insulating layer serves multiple functions: electrical insulation for the circuit patterns and light absorption to reduce pattern visibility. By making the insulating layer multi-functional, the patent improves image quality without proportionally increasing device complexity, as the same layer performs both roles.
3Adaptability or versatility
If multiple layers are added to the digitizer to improve flexibility and reduce pattern visibility, then adaptability is improved, but manufacturing complexity increases
Solution Approach 1:
The digitizer is segmented into distinct functional layers (flexible base layer, circuit patterns, insulating layers with light-absorbing materials) that can be manufactured and optimized independently. This segmentation allows each layer to be tailored for its specific function while simplifying the overall manufacturing process compared to creating a monolithic complex structure.
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 enhances the flexibility of the display device while minimizing the visibility of digitizer patterns, thereby improving image quality and user experience by reducing stress on the circuit patterns and absorbing light to prevent pattern recognition.
Implementation Method 1
a first insulating layer disposed over the first surface of the base layer to cover the first circuit pattern and including a light-absorbing material
Data Source
AI summary
A display device includes a display panel, a digitizer disposed on the display panel, and a first coupling layer disposed between the display panel and the digitizer. The digitizer includes a base layer disposed on the display panel and have flexibility, a first circuit pattern disposed on a first surface of the base layer that faces the display panel and extended in a first direction, a second circuit pattern disposed on a second surface of the base layer and extended in a second direction crossing the first direction, and a first insulating layer disposed over the first surface of the base layer to cover the first circuit pattern and including a light-absorbing material.