Image Capturing Module Adhesion via Intermediary Frame Body
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Solution Overview
Problem
Conventional optical biometric identification devices have a visual appearance issue due to different light transmission media between the cover plate and the image capturing module, causing the module to be easily perceivable by the user.
Innovation Solution
The image capturing module is positioned on a frame body, which is adhered to the cover plate with a first adhesive layer, and the module itself is adhered to the frame body with a second adhesive layer, ensuring the orthographic projection of the second adhesive layer falls within the frame body's projection, thus hiding the adhesive layer and maintaining a single light transmission medium like air between the cover plate and the module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image capturing module is directly adhered to the cover plate through an adhesive layer, then the module is firmly fixed, but the adhesive layer creates different light transmission media that make the module easily perceivable by the user
Solution Approach 1:
A frame body is introduced as an intermediary component between the cover plate and the image capturing module. The frame body is adhered to the cover plate through a first adhesive layer, and the image capturing module is adhered to the frame body through a second adhesive layer. This intermediary structure allows the adhesive layers to be positioned such that their orthographic projections fall within the projection area of the frame body, making them invisible from the front while maintaining firm fixation.
Solution Approach 2:
The solution moves the adhesive layers from a position where they are directly visible on the cover plate surface to a position where they are obscured by the frame body. By positioning the adhesive layers in the lateral dimension (between the cover plate and frame body, and between the frame body and image capturing module), their visual impact is eliminated while their functional role in fixation is preserved.
2Reliability
If multiple adhesive layers are used to fix the image capturing module, then the fixation is more reliable, but the visual appearance is degraded due to visible adhesive layers
Solution Approach 1:
The frame body serves as a mediator that conceals the multiple adhesive layers. The first adhesive layer joins the frame body to the cover plate, and the second adhesive layer joins the image capturing module to the frame body. Both adhesive layers are positioned such that they are hidden behind the frame body from the user's perspective, allowing multiple adhesive layers to be used for reliable fixation without degrading the visual appearance.
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 prevents the adhesive layer from affecting the visual effect, making the image capturing module less perceivable to the user and eliminating the need for additional adhesive layers between the cover plate and the module, ensuring a seamless visual experience.
Implementation Method 1
The frame body is joined to the cover plate through the first adhesive layer. The image capturing module is joined to the frame body through the second adhesive layer.
Data Source
AI summary
An image capturing device including a cover plate, an image capturing module, a frame body, a first adhesive layer, and a second adhesive layer is provided. The frame body and the image capturing module are located on the same side of the cover plate. The frame body is joined to the cover plate through the first adhesive layer. The image capturing module is joined to the frame body through the second adhesive layer. An orthographic projection of the second adhesive layer on the cover plate falls within an orthographic projection of the frame body on the cover plate.