Fingerprint Recognition Unit Deterioration Compensation via Luminance Feedback
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Solution Overview
Problem
Display devices face challenges in accurately measuring and compensating for the deterioration of fingerprint recognition units, which affects their performance in recognizing user fingerprints due to variations in light emission and reflection from pixel units.
Innovation Solution
A display device with a fingerprint recognition unit, a fingerprint sensing unit, and a timing control unit that generates compensation data based on luminance data from reflected light, allowing the fingerprint recognition unit to maintain performance by adjusting data signals and compensating for deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the fingerprint recognition unit uses light emitted from pixel units to recognize fingerprints, then fingerprint recognition function is enabled, but the fingerprint recognition unit deteriorates due to variations in light emission and reflection
Solution Approach 1:
The system measures the actual luminance of light emitted from pixel units and uses this feedback information to compensate for variations in light emission. By continuously monitoring and adjusting based on measured luminance values, the system maintains reliable fingerprint recognition despite deterioration or variations in the fingerprint recognition unit or pixel units.
Solution Approach 2:
The system changes the parameter of light luminance by measuring actual emission levels and adjusting compensation values accordingly. This allows the fingerprint recognition unit to adapt to variations in light emission from pixel units, maintaining recognition accuracy despite parameter changes over time or due to deterioration.
2Measurement precision
If the system measures luminance data from reflected light to detect deterioration, then compensation can be applied, but the system complexity increases due to additional sensing and processing units
Solution Approach 1:
The fingerprint sensing unit serves multiple functions: it both captures fingerprint images and measures luminance data from reflected light to detect deterioration. By making this single unit multi-functional, the system achieves precise deterioration detection without adding separate dedicated sensing devices, thus limiting the increase in system complexity.
Solution Approach 2:
The system merges the luminance measurement function with the existing fingerprint sensing capability. The same sensing unit and signal processing pathway are used for both fingerprint recognition and deterioration detection, combining multiple functions into integrated operations rather than separate systems.
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 system effectively measures and compensates for the deterioration of fingerprint recognition units, ensuring consistent and accurate fingerprint recognition by analyzing light reflections from pixel units and adjusting data signals accordingly.
Implementation Method 1
recognizing a user's fingerprint to generate first fingerprint data based on light reflected from the user's finger
Implementation Method 2
extracting a plurality of max points corresponding to ridge portions of the fingerprint from the first fingerprint data to generate second fingerprint data and generating luminance data based on the generated second fingerprint data
Data Source
AI summary
A display device may include a display unit, a finger print sensing unit, and a timing control unit. The display unit includes a plurality of pixel units and includes a fingerprint recognition unit, which may generate first fingerprint data related to a fingerprint. The fingerprint sensing unit may extract a plurality of maxima corresponding to ridge portions of the fingerprint from the first fingerprint data to generate second fingerprint data and may generate luminance data based on the second fingerprint data. The timing control unit may calculate a degree of deterioration of the fingerprint recognition unit based on the luminance data to generate compensation data. The fingerprint recognition unit may receive a data signal corresponding to the compensation data.