Image Capturing Module Laser-Corrected Filter Flatness
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Solution Overview
Problem
The assembly tilt angle of imaging modules in portable devices increases when the image sensor and sensor housing are on the same stacked datum plane, leading to reduced image quality and prolonged focusing times due to manual focusing requirements.
Innovation Solution
An image capturing module design that includes a carrier substrate with an image sensing chip, a housing frame, an actuator structure with a movable lens assembly, and an optical filter, where the optical filter's surface is aligned horizontally with the image sensing chip's surface using a laser correction system to establish a predetermined fixed focusing distance, allowing the movable lens assembly to be directly positioned on the optical filter for reduced tilt angles and faster focusing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the image sensor and sensor housing are disposed on the same stacked datum plane, then the assembly structure is simplified, but the assembly tilt angle increases leading to reduced image quality
Solution Approach 1:
The patent introduces an intermediary optical filter component between the image sensor and the movable lens assembly. This optical filter serves as a mediator that establishes a new reference plane, allowing the image sensor and sensor housing to be on the same stacked datum plane while maintaining proper optical alignment and reducing assembly tilt angle through the intermediary layer.
2Ease of operation
If manual focusing is used to adjust the movable lens assembly, then the focusing process can be completed, but the focusing time becomes very time consuming
Solution Approach 1:
The patent applies preliminary action by pre-establishing the horizontal reference plane through the optical filter before the movable lens assembly is installed. The optical filter's horizontal top surface is created in advance, providing a pre-aligned reference that eliminates the need for time-consuming manual focusing adjustments during assembly.
Solution Approach 2:
The patent replaces the mechanical manual focusing adjustment process with an optical reference system. Instead of mechanically adjusting the lens assembly position, the system uses the optical filter's horizontal surface as a reference to achieve precise alignment, substituting mechanical adjustment with optical reference alignment.
3Productivity
If the movable lens assembly is positioned without a horizontal reference, then the assembly process is faster, but the assembly tilt angle increases reducing image quality
Solution Approach 1:
The optical filter serves as a self-aligning reference component. Its horizontal top surface is automatically established during the assembly process itself, providing the alignment reference needed to position the movable lens assembly correctly without requiring external alignment tools or procedures.
Solution Approach 2:
The horizontal reference surface is created in advance through the optical filter component before the movable lens assembly is positioned. This preliminary creation of the reference plane allows for rapid assembly while ensuring precise alignment, as the reference is already in place when the lens assembly is installed.
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 reduces the assembly tilt angle and focusing time by ensuring the optical filter and image sensing chip surfaces are horizontal, enhancing the flatness and efficiency of the assembly process while maintaining high image quality.
Implementation Method 1
the first horizontal top surface is obtained by a horizontal correction system using a laser light source
Data Source
AI summary
An image capturing module for saving focusing time and increasing assembly flatness and a method of assembling the same are disclosed. The image sensing chip has a first horizontal top surface, the optical filter has a second horizontal top surface, and the first horizontal top surface and second horizontal top surface are obtained by a horizontal correction system using a laser light source. The distance from the second horizontal top surface to the first horizontal top surface is defined as a predetermined fixed focusing distance. Whereby, the movable lens assembly is directly disposed on the second horizontal top surface to save the focusing time of the movable lens assembly relative to the image sensing chip, and the first horizontal top surface and the second horizontal top surface are horizontal to each other for increasing the assembly flatness of the movable lens assembly relative to the image sensing chip.