Display Device Data Compensator for Line Crosstalk Reduction
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Solution Overview
Problem
Display devices, such as liquid crystal and organic light emitting display devices, suffer from line crosstalk defects that degrade display quality due to excessive data voltage application, leading to unintended bright or dark lines and increased power consumption from unnecessary voltage compensation.
Innovation Solution
A display device and method that includes a data driver providing data voltages to pixel rows and a data compensator, which compensates the data voltage using first and second compensation methods based on grayscale data from adjacent pixel rows, minimizing excessive voltage application and power consumption by adjusting the data voltage accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If data voltage is increased to improve display brightness and contrast, then display quality is improved, but line crosstalk defects occur causing unintended bright or dark lines
Solution Approach 1:
The patent applies preliminary compensation action by adjusting the data voltage for the current pixel row based on the grayscale values of adjacent pixel rows before the actual display rendering. The compensation value is calculated in advance using the difference between current and adjacent row grayscale data, preventing line crosstalk defects before they occur during display.
2Object-affected harmful factors
If data voltage is compensated to eliminate line crosstalk defects, then display quality is improved, but power consumption increases due to unnecessary voltage compensation
Solution Approach 1:
The patent implements partial compensation by selectively applying voltage adjustment only when necessary. The compensation value is calculated based on the absolute difference between current and adjacent row grayscale data, and only non-zero compensation values are applied. This partial action approach eliminates line crosstalk defects while avoiding unnecessary power consumption when compensation is not needed.
Data Source
AI summary
A display device and a method of driving the same are provided. The display device according to an embodiment includes a plurality of pixel rows, a data driver configured to provide first data voltages which correspond to first line grayscale data to pixels disposed in an (N−1)-th pixel row, provide second data voltages which correspond to second line grayscale data to pixels disposed in an N-th pixel row, and provide third data voltages which correspond to third line grayscale data to pixels disposed in an (N+1)-th pixel row, and a data compensator configured to compensate for the second line grayscale data by using one of a first compensation and a second compensation based on the first line grayscale data, the second line grayscale data, and the third line grayscale data.