Camera Module Infrared Filter Masking Region Design
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Solution Overview
Problem
Light incident on a camera module can be reflected by a gold wire around the image sensor, causing flare or blurring phenomena, which affects image clarity.
Innovation Solution
An infrared filter with an effective filtering region and a masking region is attached to the camera module, where the masking region blocks light from reaching the image sensor, preventing reflections and guiding light to the intended sensing area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light is allowed to pass through the lens assembly to the image sensor, then image capture function is achieved, but reflected or scattered light causes flare and blurring phenomena
Solution Approach 1:
An infrared filter is introduced as an intermediary component between the lens assembly and the image sensor. The filter includes a light receiving region that allows visible light to pass through for image capture, and a masking region that blocks reflected and scattered light from reaching the image sensor, thereby preventing flare and blurring phenomena while maintaining normal image capture functionality
Solution Approach 2:
The infrared filter is designed with different regions having different optical properties: the light receiving region has high transparency to visible light to enable image capture, while the masking region has high light blocking capability to prevent flare. This local differentiation of optical properties allows the single filter component to simultaneously achieve both functions
2Object-affected harmful factors
If an infrared filter is added to block reflected light, then flare and blurring are prevented, but device complexity increases
Solution Approach 1:
The infrared filter integrates multiple functions into a single component: it serves as both an infrared blocking filter and a visible light masking filter. The light receiving region and masking region are combined in one filter element, eliminating the need for separate filters or complex multi-layer structures, thereby reducing device complexity while effectively preventing flare and blurring phenomena
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 prevents light from being incident on regions other than the image sensor, thereby eliminating flare and blurring phenomena, ensuring improved image clarity.
Implementation Method 1
an infrared filter attached to the camera module, wherein the infrared filter includes an effective filtering region and a masking region, and the masking region blocks light from reaching the image sensor
Data Source
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AI summary
A camera module according to one embodiment comprises: a housing including a through hole and a lens assembly disposed in the through hole toward a first surface on which light is incident; an infrared filter attached to a second surface of the housing, positioned on the opposite side of the first surface to shield inflow of infrared rays from the incident light; and an image sensor for recognizing the light passing through the infrared filter, wherein the infrared filter comprises: an effective filtering region for transmitting visible light; an attachment region attached by an adhesive applied to the second surface of the housing, for forming the exterior of the infrared filter; and a masking region formed between the attachment region and the effective filtering region, wherein the effective filtering region is formed to protrude from a vertex region and overlaps with a region in which the image sensor is positioned and the attachment region is formed as an area capable of securing adhesion with the second surface and forms chamfered edges according to a shape of the masking region such that ultraviolet light can be transmitted to cure the adhesive.