Camera Module Filter Barrier Layers for Light Reflection Control
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Solution Overview
Problem
Camera modules in electronic devices face issues with strong light reflections causing spots or stains in images due to light being reflected inside the lens barrel and onto the photosensitive chip, affecting imaging quality.
Innovation Solution
A camera module design featuring a filter with a first and second barrier layer made of light-shielding materials, positioned between the lens assembly and the circuit board, to absorb and block strong light reflections on the photosensitive chip, and a mounting frame with a protrusion and chamfer to guide and secure these layers, reducing light incidence and debris entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter with barrier layers is added to block light reflections, then imaging quality is improved, but device complexity increases
Solution Approach 1:
The filter is nested within the lens barrel structure, specifically positioned between the lens assembly and the circuit board. The first barrier layer is arranged on the edge area of the filter, while the second barrier layer is positioned in the gap between the filter and the inner surface of the mounting frame, creating a nested configuration that blocks light reflections without requiring a completely separate external structure.
Solution Approach 2:
The filter acts as an intermediary component between the lens assembly and the circuit board, mediating the light path to prevent strong light at specific angles from being reflected onto the photosensitive chip. The barrier layers on the filter serve as the active light-blocking intermediary that resolves the contradiction by introducing a targeted solution rather than redesigning the entire optical path.
2Manufacturing precision
If barrier layers are added to block light, then light spots in images are reduced, but manufacturing complexity increases
Solution Approach 1:
The first barrier layer is pre-applied to the edge area of the filter during filter manufacturing, and the second barrier layer is pre-positioned in the gap between the filter and mounting frame before final assembly. This preliminary preparation of light-blocking structures simplifies the overall assembly process by pre-configuring the light path control features rather than requiring complex post-assembly adjustments.
Solution Approach 2:
The light-blocking function is segmented into two distinct barrier layers: the first barrier layer on the filter edge area and the second barrier layer in the gap between the filter and mounting frame. This segmentation allows each layer to address specific reflection paths independently, improving manufacturing precision for image sharpness while enabling modular assembly that reduces overall manufacturing 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
The solution effectively reduces light spots in captured images, enhancing image sharpness and overall imaging quality by blocking specific angle light reflections and preventing debris from reaching the photosensitive chip.
Implementation Method 1
A first barrier layer is arranged on an edge area of a surface of the filter facing away from the circuit board to absorb light of different wavelengths, and block strong light of a specific angle from being incident on the edge area of the surface of the filter facing away from the circuit board through the filter and reflected on the photosensitive chip
Implementation Method 2
A second barrier layer is located in the gap, and a surface of the second barrier layer facing away from the circuit board is located at a side of the first barrier layer facing away from the circuit board, thereby further preventing light being incident and reflected on the photosensitive chip
Data Source
AI summary
A camera module includes a circuit board, a lens assembly, a filter, and a mounting frame. The lens assembly is arranged on the circuit board, the mounting frame is arranged between the circuit board lens assembly. A through hole penetrates the mounting frame. A protrusion extends from an inner surface defining the through hole toward a central axis of the through hole. The filter is mounted on a side of the protrusion facing away from the circuit board. A first barrier layer is arranged on an edge area of a surface of the filter facing away from the circuit board. A gap is formed between the filter and the inner surface. A second barrier layer is located in the gap, and a surface of the second barrier layer facing away from the circuit board is located at a side of the first barrier layer facing away from the circuit board.