Flexible Display Fingerprint Sensor Mounting Structure
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Solution Overview
Problem
Current mobile terminals face challenges in achieving high fingerprint identification accuracy due to the superimposition of fingerprint sensors and display screens, which can lead to wrinkling of flexible displays and reduced light passage, affecting sensor performance.
Innovation Solution
A display device with a flexible display screen and a support frame that accommodates the fingerprint identification sensor, featuring a design with a transition arc face and a pressing member to securely mount the sensor, reducing the risk of display wrinkling and ensuring accurate light passage, while maintaining a small fitting area to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the fingerprint identification sensor is directly attached to the flexible display screen using adhesive, then the screen-to-body ratio is increased, but the flexible display screen may wrinkle and light passage is reduced, affecting sensor performance
Solution Approach 1:
The patent separates the fingerprint sensor mounting from direct contact with the flexible display screen. The sensor is mounted in a support frame that is attached to the screen, rather than adhering the sensor directly to the screen surface. This segmentation prevents the sensor and its mounting structure from causing wrinkles on the flexible display while maintaining the optical path for accurate fingerprint identification.
2Device complexity
If the fingerprint identification sensor is directly attached to the flexible display screen, then the structure is simplified, but the display screen may wrinkle and light passage is blocked
Solution Approach 1:
The support frame serves as an intermediary structure between the flexible display screen and the fingerprint sensor. This intermediate component provides a rigid mounting platform for the sensor while maintaining a distance from the flexible screen, preventing direct contact that would cause wrinkles. The intermediary structure thus protects the display screen flatness while enabling secure sensor mounting.
3Stability of the object's composition
If the fitting area between support frame and display screen is large, then the mounting is more stable, but the flexible display screen is more likely to wrinkle
Solution Approach 1:
The patent applies local quality by providing structural support and stability only where needed - in the support frame that houses the fingerprint sensor - while leaving the flexible display screen area minimal contact. The support frame provides localized stable mounting for the sensor, while the flexible screen maintains its flatness in the fingerprint sensing area, ensuring both mounting stability and identification accuracy.
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 reduces the risk of display wrinkling and improves fingerprint identification accuracy by ensuring the flexible display remains flat and light passes through the original path, resulting in a higher fingerprint identification accuracy compared to existing technologies.
Implementation Method 1
When light passes through the flexible display screen and enters the fingerprint identification sensor, the fingerprint identification sensor can identify a user's fingerprint
Data Source
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AI summary
A display device is provided and includes a flexible display screen, a fingerprint identification sensor and a support frame. The support frame includes a bottom wall and a side wall surrounding the bottom wall, the bottom wall and the side wall cooperatively define an accommodating space. The fingerprint identification sensor is received in the accommodating space. The side wall has a top end, the top end has a first face facing the flexible display screen and a second face abutting with the fingerprint identification sensor. A mobile terminal is further provided.