Multiplexed Display Driving With Grayscale Compensation
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Solution Overview
Problem
As the resolution of display devices increases, the size of the source driver also increases due to the need for more amplifiers to drive multiple data lines, leading to artifacts caused by differences in charge rates across data lines, which affect pixel luminance.
Innovation Solution
A display device and multiplexing driving method that compensates for grayscale data by generating compensation datasets based on the driving environment, using a timing controller to adjust data signals for each pixel, thereby improving image quality by synchronizing charge rates across multiple data lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If each amplifier drives two or more data lines to suppress the increase in source driver size, then the source driver size is reduced, but artifacts occur due to difference in charge rate of pixels through the data lines
Solution Approach 1:
The patent applies local quality by providing different compensation grayscale values to different data lines based on their specific charge rate characteristics. Each data line receives customized compensation data that addresses its individual charging behavior, thereby maintaining uniform pixel luminance across all data lines despite being driven by shared amplifiers.
Solution Approach 2:
The patent changes the grayscale parameter by generating compensation grayscale values that are added to or subtracted from the original grayscale data. This parameter modification compensates for the charge rate differences in multiplexed data lines, ensuring consistent pixel luminance without requiring additional amplifiers.
2Manufacturing precision
If grayscale compensation is applied to each pixel through timing controller, then display image quality is improved, but processing complexity and time increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing compensation grayscale values in a compensation dataset before actual display operation. The timing controller retrieves these pre-computed values during operation, significantly reducing real-time processing requirements while maintaining high display image quality through effective luminance compensation.
Data Source
AI summary
A display device includes a plurality of gate lines and data lines, a plurality of first pixels, each connected to a first data line and the gate lines, a plurality of second pixels, each connected to a second data line and the gate lines, a source driver to provide a first data signal to the first data line during a first time period and provide a second data signal to the second data line during a second time period, and a timing controller to generate first compensation grayscale data by compensating for a first original grayscale data corresponding to an input grayscale for each first pixel based on the input grayscale and a color of each first pixel, multiplex the first compensation grayscale data for each first pixel and a second original grayscale data for each second pixel, and provide the multiplexed data to the source driver.