Display Stain Compensation Using Optical Fingerprint Sensor
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Solution Overview
Problem
Display devices suffer from quality degradation due to stains caused by user deterioration, which existing compensation processes are unable to effectively address, leading to reduced display quality over time.
Innovation Solution
A method and device that utilize an illuminance sensor, optical fingerprint sensor, and application chip to determine illuminance levels, emit specific color lights, and acquire afterimage compensation data in test mode, processing this data to calculate an afterimage compensation coefficient for improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an optical stain compensation process is performed before shipping, then initial stains are compensated, but stains resulting from use over time cannot be addressed
Solution Approach 1:
The patent implements a dynamic stain compensation mechanism that adapts to changing display conditions over time. The system periodically performs afterimage compensation in test mode to update compensation coefficients, transforming the static pre-shipping compensation into a dynamic, ongoing process that maintains display quality throughout the device's lifecycle.
Solution Approach 2:
The display device performs self-diagnosis and self-compensation by using its own display panel and optical fingerprint sensor to detect afterimages and calculate compensation coefficients. This self-service mechanism eliminates the need for external calibration equipment and enables continuous autonomous maintenance of display quality.
2Productivity
If the display device operates continuously, then user functionality is maintained, but pixel deterioration and stains accumulate
Solution Approach 1:
The system implements periodic afterimage compensation by switching to test mode at predetermined intervals to measure and compensate for accumulated stains. This periodic intervention balances continuous device usability with regular quality maintenance, preventing degradation without interrupting normal operation between compensation cycles.
Solution Approach 2:
The patent performs preliminary afterimage compensation measurements in test mode before stains become visibly problematic. By detecting and compensating for afterimages early in the deterioration process, the system prevents severe quality degradation while maintaining normal display operation.
3Reliability
If existing stain compensation methods are used, then initial stains are addressed, but user-induced deterioration stains cannot be compensated
Solution Approach 1:
The system establishes a feedback loop where the optical fingerprint sensor continuously monitors display panel afterimages, and the application chip adjusts compensation coefficients based on measured deterioration. This closed-loop feedback mechanism enables the system to adapt to user-induced stains and continuously optimize compensation accuracy.
Solution Approach 2:
The optical fingerprint sensor is repurposed to serve dual functions: fingerprint authentication and afterimage compensation measurement. This multi-functionality enables the system to compensate for various types of stains (initial manufacturing stains and user-induced deterioration stains) using the same hardware infrastructure.
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 compensates for stains caused by user-induced deterioration, enhancing display quality by processing acquired data to adjust pixel performance and maintain reliable image presentation.
Implementation Method 1
acquiring, while in the test mode of the display device, afterimage compensation data relating to the amounts of deterioration of the pixels by receiving the first color light through an optical fingerprint sensor
Data Source
AI summary
A method of compensating for stains caused by deterioration of a display device, the display device including an illuminance sensor and a display panel including pixels and an optical fingerprint sensor, the method including determining, while in a test mode of the display device and via the illuminance sensor, whether an illuminance is a reference value or less, emitting, while in the test mode of the display device, first color light from the display panel when the illuminance is the reference value or less, and acquiring, while in the test mode of the display device, afterimage compensation data relating to amounts of deterioration of the pixels by receiving the first color light through an optical fingerprint sensor.