LCD Panel Driving Method for Vertical Blur Compensation
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Solution Overview
Problem
The half-source driving (HSD) structure in LCD panels leads to non-uniform luminance due to the vertical blur phenomenon caused by equal scan signal amplitudes for odd and even pixels, resulting in higher luminance for either odd or even pixels in each row, affecting image quality.
Innovation Solution
A driving method that provides scan signals with different amplitudes to odd and even pixels in each row, compensating for the feed-through effect between parasitic capacitors by adjusting the amplitude of scan signals during specific frame periods to ensure uniform luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If equal scan signal amplitudes are used for all pixels in a row, then the driving structure is simple, but non-uniform luminance occurs due to vertical blur phenomenon
Solution Approach 1:
The patent applies local quality by differentiating scan signal amplitudes based on pixel position. Odd pixels receive scan signals with a first amplitude while even pixels receive scan signals with a second amplitude, creating localized parameter variations to compensate for position-dependent parasitic capacitor effects and achieve uniform luminance across the display panel.
Solution Approach 2:
The patent changes the parameter of scan signal amplitude based on pixel type. By varying the amplitude parameter between first and second levels for odd and even pixels respectively, the invention compensates for the vertical blur phenomenon and eliminates non-uniform luminance while maintaining a relatively simple driving structure.
2Device complexity
If half-source driving structure is used, then the number of data lines is reduced, but vertical blur phenomenon causes non-uniform luminance
Solution Approach 1:
The patent addresses the luminance uniformity issue in HSD structure by applying local quality through differentiated scan signal amplitudes for odd and even pixels. This localized parameter adjustment compensates for the vertical blur effects inherent in the HSD structure, achieving uniform luminance while preserving the benefit of reduced data lines.
3Manufacturing precision
If scan signals with different amplitudes are provided to odd and even pixels, then vertical blur phenomenon is eliminated, but driving complexity increases
Solution Approach 1:
The patent implements parameter changes by varying scan signal amplitudes based on pixel position (odd vs. even). This parameter differentiation eliminates the vertical blur phenomenon and achieves uniform luminance. The complexity increase is minimal as it only requires amplitude modulation of scan signals rather than fundamental structural changes.
Data Source
AI summary
A method for driving a display panel is provided. The method includes the following steps. Firstly, providing a first scan signal to turn on a plurality of first sub-pixels within the ith pixel row of the display panel during a Nth frame period, so as to make the first sub-pixels respectively receive a corresponding first data signal. Next, providing a second scan signal to turn on a plurality of second sub-pixels within the ith pixel row of the display panel during the Nth frame period, so as to make the second sub-pixels respectively receive a corresponding second data signal. The amplitude of the first scan signal is different from the amplitude of the second scan signal, and N and i are positive integers.