Array Substrate Shared-Electrode Layout for Column Brightness Uniformity
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Solution Overview
Problem
Display panels experience flickering due to differences in brightness between columns caused by varying polarities, which worsens at lower frequencies and resolutions, leading to noticeable vertical lines during human movement.
Innovation Solution
The array substrate design includes intersecting scan and data lines forming pixel regions, with first and second data lines accessing positive and negative polarity signals respectively, and pixel electrodes connected through shared thin film transistors and storage capacitors to improve voltage differences between sub-pixel electrodes, reducing brightness disparities and flickering risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the Stripper architecture is used with alternating positive and negative polarity data lines, then the display can be driven with simplified timing control, but brightness differences between columns occur due to polarity variations causing flickering
Solution Approach 1:
The patent merges adjacent data lines of opposite polarity (first data lines and second data lines) and connects them to a common voltage source through shared electrodes. This combining approach allows both polarity types to be driven simultaneously with the same voltage signal, eliminating the brightness differences between columns while preserving the simplified timing control benefits of the Stripper architecture
Solution Approach 2:
By connecting pixel electrodes through shared thin film transistors to common voltage sources via shared electrodes, the patent creates equipotential regions for adjacent columns. This ensures that pixel electrodes in different columns experience the same voltage potential during the same time period, eliminating the brightness uniformity issues caused by polarity variations
2Loss of energy
If lower frequency and lower resolution are used, then power consumption is reduced, but the polarity difference between positive and negative frames relative to the common electrode becomes larger, worsening the flickering phenomenon
Solution Approach 1:
The patent merges the driving approaches for different polarity data lines by using shared electrodes and common voltage sources. This allows the display to operate at lower frequencies with reduced power consumption while maintaining stable brightness levels across all columns, preventing the flickering that would otherwise worsen at lower operating frequencies
Data Source
AI summary
Disclosed are an array substrate and a display panel. In the same frame, one of the first data line and the second data line accesses a positive polarity signal, and the other of the first data line and the second data line accesses a negative polarity signal; the first pixel electrode is electrically connected to the first data line, and the second pixel electrode is electrically connected to the second data line; the first shared electrode accesses a signal of the same polarity as the first data line, and the second shared electrode accesses a signal of the same polarity as the second data line.