Source Driver Pixel Deterioration Sensing and Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices face increased chip area and inaccurate compensation for pixel deterioration due to the need for sensing circuits in all channels and reliance on time-based compensation methods.
Innovation Solution
A source driver that senses pixel deterioration in specific regions of a display panel, using a sensing circuit to provide data for compensation calculations, allowing for reduced chip area and improved accuracy by using minimum, average, and maximum compensation values based on sensed data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensing circuits are included for all channels to sense pixel deterioration, then pixel deterioration sensing accuracy is improved, but source driver chip area increases
Solution Approach 1:
The display panel is divided into multiple regions, and sensing circuits are selectively arranged in only some of these regions rather than all channels. This segmentation approach allows the system to sense pixel deterioration in representative areas while reducing the overall number of sensing circuits needed, thereby decreasing chip area while maintaining adequate sensing capability.
Solution Approach 2:
The patent employs interpolation algorithms that enable the system to infer deterioration information for unsensed regions based on data from sensed regions. This self-service mechanism allows the compensation function to work effectively without requiring physical sensing circuits in every channel, thus reducing chip area while preserving compensation accuracy.
2Device complexity
If time-based compensation methods are used, then compensation process simplicity is improved, but compensation accuracy deteriorates
Solution Approach 1:
The system implements feedback by using sensing circuits to actually measure pixel deterioration in selected regions, then using this real measurement data to drive the compensation process. This feedback mechanism replaces purely time-based estimation with actual sensed information, significantly improving compensation accuracy while the interpolation algorithm maintains process simplicity by automatically extending this feedback data to unsensed regions.
Solution Approach 2:
The sensing circuits perform preliminary measurement of pixel deterioration in selected regions before the compensation process begins. This preliminary action provides accurate baseline data that guides the subsequent compensation calculations, ensuring that compensation is based on actual deterioration states rather than rough time-based estimates, thereby improving accuracy while maintaining simplicity through automated interpolation.
Data Source
AI summary
Disclosed are a source driver for sensing the degree of deterioration in pixels in some regions of a display panel and compensating for the deterioration in the display panel based on the sensed degree, by considering a characteristic in which pixels included in each display panel similarly deteriorate, and a display device including the same. The display device may include a display panel including pixels, a sensing circuit configured to provide sensing data by sensing the degree of deterioration in pixels in at least one first region of the display panel, and a compensation circuit configured to calculate an amount of compensation of each of the pixels in the first region using the sensing data and compensate for the deterioration in the pixels in the first region and pixels in a second region whose degree of deterioration is not sensed, based on the amount of compensation.