Anti-Reflection Unit for Optical Fingerprint Sensor Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical fingerprint sensors face challenges in reducing false acceptance and rejection rates due to light signal interference, which affects their accuracy and reliability in fingerprint recognition.
Innovation Solution
An electronic device with an anti-reflection unit, including a substrate or light-absorbing material, a circuit layer with a thin-film transistor, and a light-sensing element, where the anti-reflection unit absorbs light signals to prevent reflection and improve sensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an optical fingerprint sensor is used for fingerprint recognition, then personal identification can be achieved, but light signal interference causes false acceptance and rejection rates to increase
Solution Approach 1:
The patent converts the harmful reflected light into a beneficial anti-reflection mechanism by using a light-absorbing layer that selectively absorbs specific wavelengths of light. This layer transforms the problematic light interference into a useful function where reflected light is absorbed rather than causing false readings, thereby improving fingerprint recognition accuracy while reducing false acceptance and rejection rates
2Measurement precision
If a light-absorbing layer is added to reduce light signal interference, then fingerprint recognition accuracy improves, but device structure becomes more complex
Solution Approach 1:
The patent merges the light-absorbing layer with the existing sensor substrate or integrates it into the sensor's internal structure, combining the anti-reflection function with the detection function. This integration approach reduces the need for separate components and simplifies the overall device structure while maintaining improved measurement precision through effective light signal interference reduction
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 light signal interference, enhancing the accuracy and reliability of fingerprint recognition by minimizing false acceptance and rejection rates, thereby improving the overall performance of optical fingerprint sensors.
Implementation Method 1
The anti-reflection unit is disposed on the circuit layer to absorb light passing through the light-sensing element
Data Source
AI summary
An electronic device is provided. The electronic device includes a sensing device. The sensing device includes an anti-reflection unit, a circuit layer and a light-sensing element. The circuit layer includes a thin-film transistor and is disposed on the anti-reflection unit. The light-sensing element is disposed on the circuit layer and is electrically connected to the thin-film transistor.