Sensor Module Substrate Lens Structure for Peripheral Distortion
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Solution Overview
Problem
Camera modules with larger area and higher resolution face increasing peripheral distortion, leading to complex lens designs, which complicates manufacturing and hinders the miniaturization of mobile devices like smartphones.
Innovation Solution
A sensor module with a light transmissive substrate having a flat region and an uneven region, where the uneven region includes concave or convex sections, functions as a lens to simplify the lens module design and reduce the number of lenses, thereby reducing the camera module's height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor chips have larger area and higher resolution, then measurement precision is improved, but device complexity and height increase
Solution Approach 1:
The patent merges the light transmissive substrate with lens functions by forming convex sections directly on the substrate surface. This integration eliminates the need for separate lens components, thereby maintaining high measurement precision while reducing device complexity and height
Solution Approach 2:
The light transmissive substrate serves multiple functions: it acts as both a structural support element and an optical lens component. The convex sections formed on the substrate provide focusing functionality, enabling the substrate to simultaneously fulfill mechanical and optical roles, thus reducing overall device complexity
2Measurement precision
If the number of lenses is increased to reduce peripheral distortion, then measurement precision is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies local quality by forming convex sections at specific locations on the light transmissive substrate. These localized convex structures provide the necessary optical correction for peripheral distortion without requiring a complete multi-lens system, thereby simplifying manufacturing while maintaining measurement precision
Solution Approach 2:
The invention changes the physical parameters of the light transmissive substrate by forming convex sections with specific curvatures and dimensions. This parameter modification enables the substrate to provide optical focusing and distortion correction functions that would otherwise require multiple separate lens components, improving manufacturing yield
3Device complexity
If lens module design is simplified by using light transmissive substrate with convex sections, then device complexity is reduced, but manufacturing precision requirements may increase
Solution Approach 1:
The light transmissive substrate serves itself by forming convex sections directly on its own surface through known semiconductor manufacturing techniques. This self-integration approach reduces the need for precise assembly of multiple separate components, thereby reducing overall device complexity while managing manufacturing precision requirements through established processes
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 design simplifies the lens module, reduces peripheral distortion, and enhances manufacturing yield while allowing for a smaller and thinner camera module.
Implementation Method 1
The light transmissive substrate has a flat region and an uneven region on another surface opposite to one surface opposed to the light receiving surface of the sensor substrate. The uneven region has a concave section or a convex section formed therein. This makes it possible to use this light transmissive substrate as a lens.
Data Source
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AI summary
A sensor module according to an embodiment of the present disclosure includes: a sensor substrate; and a light transmissive substrate. The sensor substrate has a light receiving surface on which a plurality of light receiving elements is arranged. The light transmissive substrate is provided on the light receiving surface. The light transmissive substrate has a flat region and an uneven region on another surface opposite to one surface opposed to the light receiving surface of the sensor substrate. The flat region has a flat front surface. The uneven region has a concave section or a convex section formed therein.