Display Pixel Sensing Averaging for Ripple-Resistant Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face inaccuracies due to process deviations and aging of driving transistors, leading to variations in pixel luminance, which existing compensation methods fail to adequately address.
Innovation Solution
A display device and driving method that utilizes a sensing unit to generate sensing data by averaging or taking an intermediate value of multiple digital data points from the same pixel, minimizing sensing deviations and ripple influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If external compensation method is used to compensate for driving transistor characteristics, then pixel luminance uniformity is improved, but sensing accuracy deteriorates due to sensing deviation
Solution Approach 1:
The patent merges multiple sensing operations by performing sensing twice on the same pixel and combining the results through averaging or intermediate value selection. This integration of multiple measurements compensates for sensing deviations caused by power ripple, thereby improving sensing accuracy while maintaining pixel luminance uniformity through external compensation
2Ease of operation
If power supply is provided during sensing period, then sensing operation can be performed, but power ripple affects sensing voltage and reduces measurement precision
Solution Approach 1:
The patent implements feedback by performing sensing operations at multiple time points during the sensing period and using the collected data to calculate an averaged or intermediate sensing value. This feedback mechanism compensates for the adverse effects of power ripple on sensing voltage, maintaining measurement precision while enabling continuous sensing operations
Solution Approach 2:
The patent performs preliminary sensing operations at multiple time points before finalizing the sensing data. By conducting multiple sensing measurements in advance and processing them through averaging or intermediate value selection, the system prepares compensated sensing data that is resistant to power ripple effects
Data Source
AI summary
A display device includes pixels each including a driving transistor and a light-emitting element, a sensing unit which generates a digital data by receiving a sensing voltage corresponding to a characteristic of a driving transistor from a predetermined pixel among the pixels during a sensing period, and generates sensing data using the digital data, and a timing controller which receives input data from an outside, corrects the input data using the sensing data and generates output data, and the sensing unit generates one sensing data using two or more digital data corresponding to the predetermined pixel.