Camera Module Alignment Glass for Single-Orientation Assembly

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Solution Overview

Problem

Conventional camera modules with symmetrical glass designs face misplacement risks during assembly due to directional light filtering, which requires a specific orientation for proper function.

Innovation Solution

The glass is prepared by defining a filter glass board into groups with asymmetric unit regions arranged in 4-fold rotational symmetry, sliced to form alignment glass sheets with unique chamfers, and assembled into alignment slots with corresponding chamfers to ensure a single correct orientation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a symmetrical glass design is used, then the glass can be assembled in different orientations, but the light filtering function cannot be properly performed due to misplacement

Engineering Contradiction:

Improveassembling orientation flexibilityVSAvoidlight filtering function reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The glass is designed with an asymmetric shape featuring a chamfer at one corner, breaking the rotational symmetry. This asymmetric geometry creates a unique fitting orientation within the camera lens assembly, ensuring the glass can only be installed in the correct orientation to perform its light filtering function properly

Inventive Principle:

Principle #4Asymmetry

2Reliability

If an asymmetric glass design is used, then the assembling orientation is unique and correct, but the glass cannot be assembled in different orientations

Engineering Contradiction:

Improveassembling orientation correctnessVSAvoidassembling orientation flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The chamfer creates an asymmetric geometry that provides a unique fitting orientation. The slanted surface of the chamfer matches correspondingly with the lens housing, creating a mechanical interference fit that prevents rotation and ensures only one correct assembling orientation

Inventive Principle:

Principle #4Asymmetry

3Ease of manufacture

If a symmetrical glass design is used, then manufacturing is simpler, but misplacement occurs during assembly

Engineering Contradiction:

Improveglass manufacturing simplicityVSAvoidassembly positioning accuracy

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The chamfer is created through a single cutting operation on the glass edge, adding minimal complexity to the manufacturing process. This asymmetric feature serves as a built-in positioning guide that dramatically improves assembly positioning accuracy by preventing misplacement during the assembly process

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS12513384B2Camera module, manufacturing method thereof, and manufacturing method of glass therefor

Publication Date: 2025.12.30 TONG HSING ELECTRONICS IND LTD

AI summary

A camera module includes a camera lens and an alignment glass sheet. The camera lens includes a carrying frame, a sensor chip corresponding in position to the carrying frame, and at least one optical lens that is assembled to the carrying frame. The carrying frame has an alignment slot, and the at least one optical lens and the alignment slot are located above the sensor chip. The alignment glass sheet is assembled to the alignment slot along an assembling direction. The alignment glass sheet has an asymmetric shape, and the alignment glass sheet and the alignment slot have only one assembling orientation therebetween along the assembling direction. The alignment glass sheet has an alignment chamfer engaged in a corner of the alignment slot that corresponds in shape to the alignment chamfer.