Fingerprint Sensor Pixel Compensation in Display Apparatus
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Solution Overview
Problem
Existing display apparatuses face challenges in detecting fingerprints with high accuracy while maintaining high-quality image display.
Innovation Solution
A display apparatus with a display panel containing light-emitting elements and sensor pixels with light-receiving elements, a memory for storing compensation coefficients, and a sensor controller that corrects fingerprint data using these coefficients to calculate correction data for improved detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fingerprint detection is performed using sensor pixels in a display apparatus, then fingerprint detection capability is added, but detection precision deteriorates due to data deviations across different sensor pixels
Solution Approach 1:
The patent applies parameter changes by calculating compensation coefficients that adjust the response characteristics of each sensor pixel. These coefficients modify the raw fingerprint data to compensate for variations in light sensitivity across different sensor pixels, thereby improving detection precision while maintaining the added fingerprint detection capability
Solution Approach 2:
The patent implements feedback through the compensation coefficient calculation and application process. The system measures actual light reception data from sensor pixels, compares it against reference values, calculates compensation coefficients based on the deviations, and applies these coefficients to correct subsequent fingerprint detection data, creating a closed-loop feedback system that continuously improves measurement precision
2Measurement precision
If sensor pixels are used for fingerprint detection, then sensing sensitivity can be improved, but image display quality may deteriorate
Solution Approach 1:
The patent applies segmentation by separating the display pixel array into distinct display pixels and sensor pixels. This segmentation allows sensor pixels to be optimized for fingerprint detection sensitivity while display pixels maintain their image display quality, resolving the contradiction between sensing performance and display quality
Solution Approach 2:
The patent implements local quality by applying different functions to different regions of the pixel array. Sensor pixels located in specific regions are dedicated to fingerprint detection with optimized sensitivity, while display pixels in other regions maintain high-quality image display characteristics, allowing each region to excel at its specific function
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 enhances fingerprint detection performance while maintaining high-quality image display, improving sensing sensitivity and accuracy by compensating for data deviations across sensor pixels.
Implementation Method 1
a plurality of sensor pixels in which light-receiving elements are arranged, and a sensor controller configured to correct a plurality of fingerprint data obtained from the plurality of sensor pixels
Data Source
AI summary
A display apparatus includes: a display panel including a plurality of display pixels in which light-emitting elements are arranged, and a plurality of sensor pixels in which light-receiving elements are arranged; a memory configured to store a compensation coefficient for each of respective locations of the plurality of sensor pixels; and a sensor controller configured to correct a plurality of fingerprint data obtained from the plurality of sensor pixels, by using the compensation coefficient stored for each of the respective locations, to calculate a plurality of correction data.