Biometric Sensor Transparent Member Distance Control
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Solution Overview
Problem
Biometric sensors in electronic devices face issues with maintaining a stable distance from displays and preventing foreign substances from interfering, leading to degraded performance over time due to external impacts or aging.
Innovation Solution
Incorporating a transparent member with a biometric sensor module that includes a filter between the display panel and the sensor, ensuring a consistent distance and protection from foreign substances, comprising a circuit board, sensor housing, optical layer, and optical filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an optical biometric sensor is used for fingerprint recognition, then biometric authentication can be performed, but the sensor performance degrades over time due to changes in distance from the display or foreign substance contamination
Solution Approach 1:
A transparent member is introduced as an intermediary component between the display and the biometric sensor. This transparent member maintains a constant distance from the sensor surface and prevents foreign substances from reaching the sensor, thereby resolving the contradiction between maintaining sensor performance and extending service life.
2Length of moving object
If the distance between display and sensor is reduced for better integration, then device thickness is reduced, but foreign substances can more easily contaminate the sensor
Solution Approach 1:
The transparent member serves as a protective intermediary that allows the sensor to be positioned close to the display for thin device design, while simultaneously preventing foreign substances from contaminating the sensor surface.
Solution Approach 2:
The transparent member functions as a thin protective film or shell that maintains close proximity to the sensor without compromising protection against foreign substance contamination.
3Reliability
If a protective structure is added to maintain distance and prevent contamination, then sensor performance is maintained, but device complexity increases
Solution Approach 1:
The transparent member performs multiple functions simultaneously: it maintains a constant distance from the sensor, prevents foreign substance contamination, and allows light transmission for optical sensing. This multi-functionality reduces the need for separate protective components, thereby limiting the increase in device complexity.
Data Source
AI summary
An electronic device is provided. The electronic device includes a transparent member comprising a transparent material, a display panel disposed under the transparent member and including a plurality of pixels, a biometric sensor disposed under the display panel, and a filter disposed between the display panel and the biometric sensor and covering the biometric sensor.