Z-Architecture Pixel Structure for High Refresh Rate Displays
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Solution Overview
Problem
High refresh rate displays face issues such as color contamination, fine pitch, and horizontal stripes when doubling the charging time for subpixel circuits, which affects image quality and refresh rate.
Innovation Solution
A pixel structure with a Z-like architecture where subpixels connected to the same data line are of the same color, and switching elements are controlled by gate lines to charge subpixels simultaneously, ensuring same polarity data voltages are applied during dot inversion to prevent color contamination and other issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If two gate lines are turned on simultaneously to double the charging time and refresh rate, then the refresh rate is improved, but color contamination occurs
Solution Approach 1:
The patent segments the data lines into two independent sets: first data lines (D1, D3, D5...) connected to odd-numbered subpixel circuits and second data lines (D2, D4, D6...) connected to even-numbered subpixel circuits. This segmentation ensures that when two gate lines are activated simultaneously, each subpixel receives data from its dedicated data line, preventing color contamination between adjacent subpixels of different colors.
Solution Approach 2:
The patent applies local quality by assigning different data line connections to different regions: odd-numbered subpixel circuits use first data lines while even-numbered subpixel circuits use second data lines. This localized differentiation in data line allocation prevents color contamination in specific regions while maintaining high refresh rate operation across the entire display.
2Duration of action of moving object
If two gate lines are turned on simultaneously to double the charging time, then the charging time is increased, but fine pitch and horizontal stripes occur during dot inversion
Solution Approach 1:
The patent segments the display into odd and even rows, with odd rows controlled by first gate lines and even rows controlled by second gate lines. During dot inversion, this segmentation ensures that adjacent subpixels in different rows receive pre-charged data with appropriate polarity, preventing fine pitch and horizontal stripe artifacts while maintaining extended charging time for high refresh rate operation.
Solution Approach 2:
The patent implements preliminary action by pre-charging data lines before they are needed for actual pixel charging. The first and second data lines are pre-charged with appropriate polarities in advance, ensuring that when two gate lines are activated simultaneously for extended charging, the data is already prepared with correct polarity, preventing image quality defects during dot inversion.
Data Source
AI summary
A pixel structure, a driving method and a display device are provided. The pixel structure includes a plurality of gate lines arranged in rows, a plurality of data lines arranged in columns, and a plurality of subpixel circuits arranged in an array form. Each subpixel circuit includes a subpixel and a switching element, the subpixel is electrically connected to one of the data lines via the switching element, a control electrode of the switching element is electrically connected to one of the gate lines, and the subpixels electrically connected to the same data line are in a same color.