Image Capturing Module Assembly Flatness Correction
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Solution Overview
Problem
The assembly tilt angle of the sensor housing relative to the image sensor in portable devices' imaging modules decreases image quality due to their shared datum plane, which is a challenge in achieving high-quality, small-sized imaging modules with auto-focus or optical zoom capabilities.
Innovation Solution
An image capturing module is designed with an image sensing unit, a housing frame, an actuator structure, and a reflecting material, where the image sensing chip and reflecting material's horizontal surfaces are corrected using a laser light source to ensure horizontal alignment, reducing the assembly tilt angle of the movable lens assembly relative to the image sensor, thereby increasing assembly flatness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the image sensing chip and sensor housing are disposed on the same datum plane of the circuit board, then the assembly structure is simplified, but the assembly tilt angle increases which decreases image quality
Solution Approach 1:
The patent introduces a laser light source to create a vertical reference dimension perpendicular to the circuit board plane. By measuring the vertical distance from the laser light source to the top surfaces of both the image sensing chip and sensor housing, the system establishes a new dimensional reference that enables precise horizontal alignment correction, thereby improving assembly flatness without complicating the overall structure.
Solution Approach 2:
The patent replaces traditional mechanical alignment methods with an optical measurement system using a laser light source. Instead of relying on mechanical fixtures or physical jigs to ensure horizontal alignment, the system uses optical projection and vertical distance measurement to detect and correct assembly tilt angles, achieving higher precision with a simpler overall system.
2Manufacturing precision
If the number of pixels is increased to improve picture quality, then the image quality improves, but the module size increases
Solution Approach 1:
The patent changes the parameter of assembly flatness by using laser-based horizontal correction to reduce the assembly tilt angle. This parameter change ensures that light rays from the lens focus accurately on the image sensing chip, thereby improving image quality without requiring an increase in module size. The precise alignment achieved through this method allows high-quality imaging within a compact form factor.
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 approach enhances the assembly flatness of the image capturing module, improving image quality by reducing the tilt angle of the movable lens assembly, thus enabling higher quality images in portable devices with auto-focus or optical zoom capabilities.
Implementation Method 1
The image sensing chip has a first horizontal top surface on the top side thereof, and the first horizontal top surface is obtained by a horizontal correction system using a laser light source
Implementation Method 2
The reflecting material has a second horizontal top surface on the top side thereof, and the second horizontal top surface is obtained by the horizontal correction system using the laser light source
Data Source
AI summary
An image capturing module includes an image sensing unit, a housing frame, an actuator structure and a reflecting material. The image sensing unit includes a carrier substrate and an image sensing chip, and the image sensing chip has a first horizontal top surface on the top side thereof. The housing frame is disposed on the carrier substrate to surround the image sensing chip. The actuator structure includes a lens holder disposed on the housing frame and a movable lens assembly movably disposed inside the lens holder. The reflecting material is movably and temporarily placed on the movable lens assembly, and the reflecting material has a second horizontal top surface on the top side thereof. 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.