GOA Circuit Brightness Compensation for TFT-LCD Striped Patterns
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Solution Overview
Problem
In thin film transistor-liquid crystal displays (TFT-LCDs) with GOA circuits using six clock signals, impedance differences lead to horizontal striped patterns due to varying degrees of gate electrode activation, causing brightness inconsistencies that can be perceived by human eyes.
Innovation Solution
A method and device for driving the GOA circuit, involving determining a bright-dark period and compensating data signals at affected rows by adjusting grayscale values, with the time controller outputting specific data signals to either increase or decrease brightness to reduce brightness differences between rows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If GOA circuit uses six clock signals for driving, then display refresh rate and scanning efficiency are improved, but impedance difference between clock signal lines causes brightness inconsistency and horizontal striped patterns
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the data signal values based on the row number and detected brightness characteristics. Specifically, different grayscale values are applied to different rows (e.g., first row receives different grayscale value than second row) to compensate for impedance differences in clock signal lines, thereby maintaining brightness uniformity while using six-clock GOA circuit for high refresh rate display
2Manufacturing precision
If data signals are compensated for brightness at affected rows, then horizontal striped patterns are prevented, but display complexity and control signal processing increase
Solution Approach 1:
The patent implements local quality by applying different compensation strategies to different rows based on their specific brightness characteristics. Instead of uniform compensation, the system identifies which rows have brightness issues (first row, second row, etc.) and applies targeted adjustments only to those rows, while leaving other rows unchanged. This localized approach reduces overall system complexity compared to comprehensive compensation methods
Data Source
AI summary
The present disclosure provides a method and a device for driving a GOA circuit, a time controller and a display device. The method includes steps of: determining a bright-dark period for striped patterns on a display panel; and compensating for data signals at rows where the striped patterns are located periodically in accordance with the bright-dark period.