Display device including a finger print sensor
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Solution Overview
Problem
Fingerprint sensors in display devices can become dislodged during fabrication, leading to reduced accuracy.
Innovation Solution
A display device with a fingerprint sensor is secured using a first fixing member made of thermosetting resin and a second fixing member made of photo-curable resin, both overlapping the fingerprint sensor to stabilize its position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single fixing member is used to secure the fingerprint sensor, then the device structure is simple, but the fingerprint sensor may become dislodged during fabrication reducing accuracy
Solution Approach 1:
The fixing structure is divided into two separate fixing members (first fixing member and second fixing member) that are disposed at different positions on the fingerprint sensor. This segmentation allows each fixing member to perform a specific fixing function, thereby improving the positional accuracy and stability of the fingerprint sensor during fabrication while maintaining reasonable structural complexity
Solution Approach 2:
The first fixing member is applied to fix the fingerprint sensor at an initial position, and then the second fixing member is applied to further secure the sensor. This preliminary action sequence ensures that the fingerprint sensor is progressively stabilized, preventing dislodgement and maintaining manufacturing precision throughout the fabrication process
2Reliability
If multiple fixing members are used to secure the fingerprint sensor, then the positional stability is improved, but the device structure becomes more complex
Solution Approach 1:
The first fixing member and second fixing member are disposed at different local positions on the fingerprint sensor, with each fixing member having its own specific function and characteristics. This local quality differentiation allows the system to achieve high reliability through distributed fixing while managing overall structural complexity by assigning specific roles to each component
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 dual fixing members effectively prevent the fingerprint sensor from dislodging, maintaining its accuracy and functionality.
Implementation Method 1
The first fixing member includes a thermosetting resin
Implementation Method 2
The second fixing member includes a photo-curable resin
Data Source
Figure 1
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Figure 4
AI summary
A display device includes a protective layer. A display panel is disposed on an upper surface of the protective layer. The display panel includes a display area configured to display an image and a non-display area at least partially surrounding the display area. A cover panel is disposed on a back surface of the protective layer. The cover panel includes an opening that exposes the protective layer. A fingerprint sensor is disposed within the opening of the cover panel. The fingerprint sensor is configured to sense a fingerprint. A first fixing member is disposed on one surface of the fingerprint sensor. A second fixing member at least partially overlaps at least one side of the first fixing member, the second fixing member fixing the fingerprint sensor. The first fixing member and the second fixing member each include at least one different material from each other.