Reflective Portion for Fingerprint Sensor Light Intensity
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Solution Overview
Problem
Existing display panels with fingerprint recognition functionality suffer from poor sensitivity due to inadequate light intensity reaching the fingerprint sensor, which affects the accuracy of fingerprint recognition.
Innovation Solution
Incorporating a reflective portion between the fingerprint sensor and sub-pixels in a direction perpendicular to the substrate, which enhances the light intensity entering the fingerprint sensor by reflecting and redirecting light that would otherwise be lost, thereby improving sensitivity without affecting normal light emission or display functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fingerprint sensor is added to the display panel for fingerprint recognition, then fingerprint recognition function is achieved, but light intensity reaching the sensor is insufficient leading to poor recognition sensitivity
Solution Approach 1:
A reflective portion is introduced as an intermediary element between the sub-pixels and the fingerprint sensor. This reflective portion redirects light that would otherwise be lost, directing it toward the fingerprint sensor to enhance the light intensity reaching the sensor, thereby improving fingerprint recognition sensitivity without requiring additional light sources
Solution Approach 2:
The reflective portion converts light that would normally be wasted or lost in the display panel structure into a beneficial resource by redirecting it to the fingerprint sensor. This transforms what would be harmful light loss into useful illumination for fingerprint recognition, improving sensor performance without additional energy consumption
2Reliability
If the display panel structure is modified to improve light distribution for the fingerprint sensor, then recognition sensitivity improves, but device structure becomes more complex
Solution Approach 1:
The reflective portion serves multiple functions within the display panel: it enhances light distribution to the fingerprint sensor, maintains compatibility with existing sub-pixel structures, and does not interfere with normal display functionality. This multi-functionality allows the same structural element to benefit both display performance and fingerprint recognition sensitivity
Solution Approach 2:
The reflective portion is strategically positioned in specific locations within the display panel where it can most effectively redirect light to the fingerprint sensor. By applying the reflective property locally rather than throughout the entire panel, the design achieves improved light distribution with minimal structural modification and complexity
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 configuration significantly enhances fingerprint recognition sensitivity by increasing the utilization of fingerprint reflection light, allowing for more accurate fingerprint recognition without the need for additional light sources or structural modifications, thus simplifying the display panel design.
Implementation Method 1
a reflective portion located between the fingerprint sensor and the sub-pixels in a direction perpendicular to a plane of the substrate, and configured to increase light intensity of light that enters the fingerprint sensor
Data Source
AI summary
A display panel and a display apparatus are provided, which can improve the fingerprint recognition sensitivity. The display panel includes: a substrate; sub-pixels located at a side of the substrate; a fingerprint sensor located at a side of the substrate away from a light-exiting side of the display panel; and a reflective portion located between the fingerprint sensor and the sub-pixels in a direction perpendicular to a plane of the substrate, and configured to increase light intensity of light that enters the fingerprint sensor.