Image Sensor Grating Structure for Flare Reduction
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Solution Overview
Problem
Existing image sensors face challenges in achieving high-quality image signals due to issues like flare phenomena and optical cross-talk, which affect image quality.
Innovation Solution
The implementation of a grating structure on the filter units of the image sensor, comprising grating portions arranged in groups, reduces flare and minimizes optical cross-talk by optimizing light guidance and reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional image sensor structure is used, then the device is simple to manufacture, but flare phenomena and optical cross-talk occur reducing image quality
Solution Approach 1:
The filter unit is segmented into multiple regions: a first region with a first filter material and a second region with a second filter material. This segmentation allows different materials to be positioned strategically to reduce flare and optical cross-talk while maintaining manufacturing feasibility through standardized fabrication processes.
Solution Approach 2:
The filter unit employs composite materials by combining a first filter material and a second filter material within the same filter unit. This composite structure enables simultaneous optimization of light filtering properties and reduction of harmful optical effects like flare and cross-talk.
2Object-affected harmful factors
If image quality is improved by reducing flare and optical cross-talk, then the grating structure adds manufacturing complexity
Solution Approach 1:
The grating structure is divided into multiple grating groups, with each group containing multiple grating portions. This segmentation approach reduces the complexity of individual grating elements while achieving the overall optical effect of reducing flare and cross-talk through collective action of multiple simpler components.
Solution Approach 2:
The grating portions are arranged in a two-dimensional grid pattern across the filter unit surface. This dimensional arrangement transforms a potentially complex three-dimensional structure into a simpler planar configuration, reducing manufacturing complexity while maintaining optical effectiveness.
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 grating structure enhances image quality by decreasing flare occurrences and minimizing optical cross-talk, resulting in improved image signal quality.
Implementation Method 1
The grating structure is disposed on the filter units, and includes grating portions. The grating portions form a number of grating groups... with the grating structure of the image sensor, the phenomenon wherein a flare appears on the image generated by the image sensor is decreased, and the optical cross talk of the image sensor is minimized
Data Source
AI summary
An image sensor includes a sensing layer, filter units, and a grid structure. The filter units are disposed on the sensing layer. The grid structure is disposed on the filter units, and includes grating portions. The grating portions form a number of grating groups, and each of the grating groups is separated from each other.