Master-Slave Timing Controller for OLED Degradation Compensation
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Solution Overview
Problem
Conventional driving and compensation schemes for display devices with large screens and high resolution, such as OLEDs, face challenges in preventing device degradation like threshold voltage shift and luminance changes, which cannot be directly applied to these high-resolution displays.
Innovation Solution
A timing controller system comprising a master timing controller and multiple slave timing controllers that split and distribute externally supplied data signals to data drivers, implementing a degradation compensation mode to prevent device degradation by shifting data signals and inserting black data to fill empty areas, thereby maintaining image consistency and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional driving and compensation schemes are applied to high-resolution display devices, then device degradation can be compensated, but the schemes cannot be directly applied due to the large screen and high resolution requirements
Solution Approach 1:
The patent divides the display panel into multiple regions (first region and second region) with different driving methods. The first region uses conventional driving while the second region uses degraded driving with black data insertion, allowing the compensation scheme to be adapted to high-resolution displays by segmenting the display area into zones that can be managed differently
2Reliability
If data signals are shifted to compensate for device degradation, then luminance characteristics are stabilized, but empty areas are created in the display
Solution Approach 1:
The patent recovers the empty areas created by data signal shifting by inserting black data (first black data and second black data) into the display regions. This discards the empty space problem by filling it with black data that maintains the display structure while compensating for the shifted data signals
Solution Approach 2:
The patent converts the harmful effect of data signal shifting (which creates empty areas) into a beneficial compensation mechanism. By intentionally shifting data signals and inserting black data, the system achieves luminance stabilization while maintaining full display coverage, turning the potential harm into a useful degradation compensation technique
3Manufacturing precision
If multiple slave timing controllers are used to distribute data signals, then high-resolution display requirements are met, but device degradation still affects particular subpixels
Solution Approach 1:
The patent applies different driving methods to different regions of the display panel. The first region uses conventional driving while the second region uses degraded driving with black data insertion, allowing local adaptation to degradation patterns and maintaining high-resolution display quality while compensating for subpixel degradation in specific areas
Data Source
AI summary
The present disclosure provides a timing controller, a display device using the same, and a method of driving the display device. The display device includes a display panel displaying an image, at least two data drivers supplying a data signal to the display panel, at least two slave timing controllers that control the at least two data drivers, respectively, and supply the data signal to the at least two data drivers, respectively, and a master timing controller that controls the at least two slave timing controllers and that itself splits an externally supplied data signal and distributes the same to the at least two slave timing controllers.