Display Driver Subpixel Brightness Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices experience variations in operating parameters over time, leading to decreased brightness and non-uniformity, resulting in visible defects in displayed images due to aging of subpixels, which existing technologies struggle to effectively correct.
Innovation Solution
A method involving a display driver that compares subpixel data signals to thresholds, increments counters for subpixels driven at maximum brightness, and adjusts these signals based on counter values to compensate for reduced brightness, ensuring uniformity and maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If display devices are used over time, then the display device operates continuously, but the brightness decreases and non-uniformity increases due to material changes
Solution Approach 1:
The patent implements a feedback mechanism where the display driver circuitry continuously monitors subpixel brightness levels and dynamically adjusts drive signals to compensate for aging effects. Counter values are accumulated based on subpixel performance deviations, and compensation is applied in real-time to maintain uniform brightness across all subpixels throughout the display's operational life.
2Duration of action of stationary object
If display devices are used over time, then the display device operates continuously, but visible defects and non-uniform brightness appear in the displayed image
Solution Approach 1:
The patent applies preliminary compensation actions by accumulating counter values that track subpixel brightness deviations over time. Before visible defects become apparent to users, the system has already recorded performance variations and prepared compensation data, allowing proactive correction of brightness non-uniformity and prevention of visible image defects.
3Illumination intensity
If subpixel brightness is increased to compensate for aging, then brightness uniformity improves, but energy consumption increases
Solution Approach 1:
The patent applies local quality compensation by individually adjusting drive signals for each subpixel based on its specific counter value and brightness deviation. Rather than uniformly increasing brightness across the entire display, the system applies targeted compensation only to subpixels that exhibit aging effects, thereby maintaining brightness uniformity while minimizing overall energy consumption.
Data Source
AI summary
A system and method for updating a display of a display device. The display device may include a plurality of subpixels, and a display driver coupled to the plurality of subpixels. The display driver may be configured to compare a first data signal of a first statistically selected subpixel of the plurality of subpixels to a first statistically selected threshold, increase a value of a first counter corresponding to the first statistically selected subpixel in response to the first subpixel data signal exceeding the first statistically selected threshold, adjust the first subpixel data signal in response to the first counter value satisfying a second threshold, and drive the first statistically selected subpixel based at least in part on the adjusted first subpixel data signal.