Optical Fingerprint Module Structure With Air Gap and Scattering Layer
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Solution Overview
Problem
Conventional module structures integrating optical fingerprint imaging and display technology suffer from excessive dependence between the sensing and display panels, leading to stress issues and suboptimal performance.
Innovation Solution
A module structure is introduced with a sensing component, a sensing surface, a display component, an air layer between them, and a scattering layer between the air layer and the display component, which reduces dependence and enhances light transmission efficiency by preventing total reflection and improving light extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the sensing component and display component are completely attached to each other, then the structural stability is improved, but the stress on the display component increases and the dependence between components worsens
Solution Approach 1:
The patent introduces an air layer as an intermediary between the sensing component and display component. This air layer acts as a mechanical decoupling element that reduces stress transmission while maintaining optical functionality. The air layer allows the components to be separated by a small distance, preventing direct stress contact while still enabling the integrated module structure to function as a unified system.
2Stability of the object's composition
If the sensing component and display component are completely attached to each other, then the structural stability is improved, but the dependence between components increases
Solution Approach 1:
The air layer serves as a decoupling intermediary that reduces the mechanical and thermal dependence between the sensing component and display component. This allows each component to be optimized independently while still functioning as part of an integrated module, improving adaptability and reducing the negative effects of component dependence.
3Stress or pressure
If an air layer is introduced between the display component and sensing component, then the dependence between components is reduced and stress is decreased, but the light transmission efficiency may be affected due to total reflection
Solution Approach 1:
The patent converts the harmful effect of total internal reflection at the air interface into a beneficial scattering effect. By introducing a scattering layer, the previously lost light that would have been totally reflected is now scattered into useful directions, allowing it to reach the sensing component. This transforms the optical loss into an opportunity for enhanced light utilization through multiple scattering events.
Solution Approach 2:
The scattering layer acts as an optical intermediary between the air layer and the display component. It mediates the light transmission by scattering the light that would otherwise be totally reflected at the air interface, enabling efficient light coupling across the air gap while maintaining the mechanical benefits of the decoupled structure.
4Loss of energy
If a scattering layer is added between the air layer and display component, then the light extraction efficiency is improved and total reflection is prevented, but the device complexity increases
Solution Approach 1:
The scattering layer can be implemented using porous materials or materials with embedded scattering particles, which provide effective light scattering functionality while maintaining a relatively simple structural form. The porous or particulate structure creates multiple light scattering events without requiring complex layered architectures, thus improving light extraction efficiency with minimal increase in device complexity.
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 decouples the sensing and display components, reduces stress-induced issues, and enhances the display effect by ensuring smooth signal light transmission and improved photosensitive efficiency, thereby improving the overall performance of the module structure.
Implementation Method 1
a scattering layer, disposed between the air layer and the display component. Light generated by the display component is reflected or refracted on the sensing surface to form signal light carrying an information, and the signal light is transmitted through the scattering layer and the air layer and received by the sensing component
Implementation Method 2
an air layer, disposed between the display component and the sensing component
Implementation Method 3
Light generated by the display component is reflected or refracted on the sensing surface to form signal light carrying an information
Implementation Method 4
the signal light is transmitted through the scattering layer and the air layer and received by the sensing component
Data Source
AI summary
The present disclosure provides a module structure and an electronic apparatus. The module structure includes: a sensing component, a sensing surface and a display component disposed between the sensing component and the sensing surface; an air layer disposed between the display component and the sensing component; and a scattering layer disposed between the air layer and the display component; wherein light generated by the display component is reflected or refracted on the sensing surface to form signal light carrying an information, and the signal light is transmitted through the scattering layer and the air layer and received by the sensing component. The present disclosure can realize decoupling between the sensing component and the display component, reduce the influence of a bonding stress on a display effect of the display component, and avoid the influence of the air layer on the realization of the function of the sensing component.