Image Capturing Module with Photosensitive Film for Low Light
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Solution Overview
Problem
Portable device imaging modules face decreased image quality under low light conditions due to insufficient light absorption and focusing mechanisms, despite advancements in pixel count and auto-focus modes.
Innovation Solution
An image capturing module comprising an image sensing unit with a microlens array substrate and a nonconductive photosensitive film layer for enhanced light absorption, combined with a movable lens assembly within a housing frame for improved focusing, which increases image quality and light absorption capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels is increased to improve image quality, then the resolution is improved, but the device size increases
Solution Approach 1:
The imaging module is divided into multiple functional layers including microlens array substrate, photosensitive film layer, and color filter layer, each performing specific functions to optimize image quality without increasing overall device volume
Solution Approach 2:
The patent transitions from a planar pixel arrangement to a three-dimensional stacked architecture with multiple functional layers, enabling higher resolution without proportionally increasing the device footprint by utilizing vertical space
2Measurement precision
If auto-focus mode is implemented to improve image quality, then the focusing capability is improved, but the device complexity increases
Solution Approach 1:
The microlens array substrate and color filter layer are merged into a single integrated structure, reducing the number of separate components and simplifying the overall module design while maintaining auto-focus functionality
Solution Approach 2:
The microlens array substrate serves multiple functions including light focusing, structural support, and alignment reference for other layers, reducing the need for separate components and simplifying the overall design
3Illumination intensity
If the light absorption capability is increased to improve image quality in low light conditions, then the light sensitivity is improved, but the device complexity increases
Solution Approach 1:
The patent employs a composite structure combining microlens array substrate with photosensitive film layer and color filter layer, where each material contributes specific optical properties to enhance light absorption and sensitivity without requiring complex separate systems
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 image sharpness and resolution by efficiently guiding light to the microlens array and allows for better focusing, thereby improving image quality even in low light conditions.
Implementation Method 1
a nonconductive photosensitive film layer disposed on the microlens array substrate for increasing the light absorption capability
Implementation Method 2
a microlens array substrate disposed on the image sensing chip
Implementation Method 3
The auto-focus mode employs the principle of moving the lens in the imaging module suitably according to various distances of targets, whereby the optical image of the desired target can be focused correctly on an image sensor
Data Source
AI summary
An image capturing module includes an image sensing unit and an optical auxiliary unit. The image sensing unit includes a carrier substrate, an image sensing chip disposed on the carrier substrate and electrically connected to the carrier substrate, a microlens array substrate disposed on the image sensing chip, and a nonconductive photosensitive film layer disposed on the microlens array substrate for increasing the light absorption capability. The optical auxiliary unit includes a housing frame and a movable lens assembly. The housing frame is disposed on the carrier substrate to cover the image sensing chip, the microlens array substrate and the nonconductive photosensitive film layer, and the movable lens assembly is movably disposed in the housing frame.