Pixel Sensing Device Channel Error Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pixel sensing devices face inaccuracies due to differences among channel circuits, which can lead to deterioration of image quality and issues like burn-in, as these devices do not adequately compensate for the unique characteristics of pixels over time and varying environments.
Innovation Solution
A pixel sensing device with multiple channel circuits that generate sensing data in two modes: one using a test current and another combining a test current with a pixel current, allowing for error recognition and compensation, thereby improving data processing and image quality by accounting for pixel characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple channel circuits are used to measure many pixels within short time, then productivity is improved, but manufacturing precision deteriorates due to differences among channel circuits
Solution Approach 1:
The patent applies preliminary action by performing calibration measurements before actual pixel sensing. The calibration unit measures calibration currents through all channel circuits to obtain calibration data in advance, which is then stored and used to correct subsequent pixel measurements. This preliminary calibration step eliminates channel circuit differences before they affect productivity, allowing multiple channels to operate in parallel without sacrificing accuracy.
Solution Approach 2:
The patent implements feedback by using the measured calibration data to correct pixel sensing results. The calibration unit provides feedback information about channel circuit characteristics, and the sensing unit uses this feedback to compensate for differences among channels. This closed-loop approach ensures that while multiple channels operate simultaneously for high productivity, the output accuracy maintains manufacturing precision through continuous correction.
2Device complexity
If pixel sensing device does not compensate for channel circuit differences, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the sensing device into functionally independent units: a calibration unit for measuring channel characteristics and a sensing unit for actual pixel measurement. This segmentation allows the calibration function to be performed separately and its results stored, enabling the sensing unit to operate with pre-compensated values. The segmentation maintains measurement precision without significantly increasing overall device complexity by reusing the same physical channels for both calibration and sensing.
Solution Approach 2:
The patent uses copying by creating a calibration model that replicates the behavior of each channel circuit. Instead of physically duplicating or complicating the sensing circuitry, the system creates digital copies of channel characteristics through calibration measurements. These copied calibration data are then used to correct sensing results, achieving high measurement precision through information copying rather than physical complexity.
Data Source
AI summary
The present invention relates to a pixel sensing device capable of compensating for an error included in a test current itself by supplying, when a pixel current is sensed, the test current used in the sensing of each channel circuit error.