Display Panel Data Line Capacitance Compensation for Bright Stripes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In irregularly shaped display panels, the unequal lengths of data lines result in unequal storage capacitance, leading to faster signal attenuation and bright stripes in low gray scale images due to differences in charge and discharge times across data lines.
Innovation Solution
The introduction of a varying number of auxiliary capacitors, with more capacitors provided to shorter data lines, is implemented by configuring additional pixel regions between data lines and the edge of the display region, ensuring equalization of total load capacitance across all data lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If irregularly shaped display panel is used to expand application scenarios, then adaptability is improved, but manufacturing precision deteriorates due to unequal data line lengths causing unequal storage capacitance
Solution Approach 1:
The patent applies local quality by configuring different numbers of compensation capacitors for different data lines based on their specific lengths. Shorter data lines are assigned more compensation capacitors while longer data lines receive fewer, creating locally optimized capacitance distribution that compensates for the geometric irregularities of the display panel.
Solution Approach 2:
The patent changes the parameter of storage capacitance by introducing adjustable compensation capacitors with different capacitance values. This allows the total load capacitance to be modified and equalized across all data lines, transforming the fixed unequal capacitance distribution into a可调 (adjustable) system that achieves uniformity.
2Device complexity
If data lines of different lengths are used in irregular display panel, then device complexity is reduced for non-rectangular shapes, but reliability deteriorates due to unequal charge and discharge times causing bright stripes
Solution Approach 1:
The patent implements local quality by providing different numbers of compensation capacitors to different data lines according to their specific lengths. This localized compensation ensures that each data line achieves equal total load capacitance, maintaining uniform charge and discharge times across the entire display panel despite the irregular geometry.
Solution Approach 2:
The patent converts the harmful effect of unequal data line lengths into a benefit by using these length differences as the basis for differential capacitor configuration. The shorter data lines, which originally caused faster signal attenuation and bright stripes, are compensated with additional capacitors to extend their hold time, transforming the defect into a balanced system.
3Area of stationary object
If shorter data lines are used in irregular display panel, then area is reduced for compact design, but manufacturing precision deteriorates due to faster signal attenuation causing bright stripes
Solution Approach 1:
The patent applies local quality by specifically targeting shorter data lines with additional compensation capacitors. This localized compensation approach addresses the signal attenuation issue only where it occurs (on shorter data lines) without affecting the overall compact design or requiring changes to longer data lines.
Solution Approach 2:
The patent implements preliminary action by pre-configuring the appropriate number of compensation capacitors for each data line during the manufacturing process, based on predetermined length criteria. This ensures that signal holding time uniformity is built into the design from the beginning, preventing bright stripe formation before the display operates.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively suppresses bright stripes in medium-low gray scale images by ensuring equal signal holding times across all data lines, maintaining image quality in irregularly shaped display panels.
Implementation Method 1
the at least one second pixel region at least comprises a first metal line segment and a second metal line segment arranged in parallel; the first metal line segment is formed in a first metal layer; the second metal line segment is formed in a second metal layer
Data Source
AI summary
A display panel, a display device, and a fabrication method for the display panel are provided. The display panel comprises an array substrate comprising a display region, wherein the display region comprises a plurality of data lines, a plurality of scanning lines, and a plurality of first pixel regions defined by the plurality of data lines and the plurality of scanning lines intersecting the plurality of data lines. At least two data lines have different lengths, at least one second pixel region is disposed between a first pixel region corresponding to a data line and an edge of the display region corresponding to the data line. The at least one second pixel region at least comprises a first metal line segment and a second metal line segment arranged in parallel, and the first metal line segment is disposed on an extension line of the data line.