Touch Display Panel Asymmetric Sub-Pixel Data Line Arrangement
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Solution Overview
Problem
Current touch display panels with integrated touch and display driver technology suffer from display color differences and brightness variations at the front and rear ends due to asymmetric data signal lines and inconsistent coupling capacitances, affecting display quality and introducing issues like cross-color problems.
Innovation Solution
The touch display panel design optimizes the arrangement of sub-pixels and data lines, ensuring a specific distance relationship between sub-pixel columns and adjacent data lines to neutralize pixel brightness differences, while maintaining a simple manufacturing process and avoiding the need for additional masks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If asymmetric data signal lines are used in touch display panels, then device complexity is reduced and manufacturing is simplified, but display color differences and brightness variations occur at the front and rear ends
Solution Approach 1:
The patent applies asymmetry principle by intentionally designing different distance relationships for different sub-pixel columns. Specifically, for the first sub-pixel column, the distance to the first data line is set to be less than the distance to the second data line, while for the second sub-pixel column, the distance to the first data line is set to be greater than the distance to the second data line. This asymmetric arrangement compensates for the inherent asymmetry in data line routing, balancing the coupling capacitances and eliminating display color differences at the front and rear ends.
Solution Approach 2:
The patent changes the physical parameter of distance between data lines and sub-pixel columns to adjust coupling capacitance values. By precisely controlling the distances (d1, d2, d3, d4) between data lines and sub-pixel columns, the patent modifies the electrical parameters (coupling capacitances) to achieve balanced display performance across different columns, thereby resolving the color uniformity issue while maintaining simple data line routing.
2Manufacturing precision
If additional masks are added to correct display color differences, then display quality is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The patent applies the self-service principle by enabling the data line arrangement itself to compensate for display color differences through optimized distance relationships. The asymmetric distance configuration (d1 < d2 for the first column, d3 > d4 for the second column) allows the existing data lines to self-correct the coupling capacitance imbalance, eliminating the need for additional corrective masks or complex manufacturing processes while maintaining display color uniformity.
3Reliability
If data lines are positioned closer to certain sub-pixel columns, then coupling capacitance is increased for those columns, but brightness differences and color shifts occur across the display panel
Solution Approach 1:
The patent applies the counterweight principle by creating compensatory distance relationships that balance the coupling capacitances across different sub-pixel columns. The asymmetric arrangement where the first sub-pixel column has closer proximity to the first data line (d1 < d2) while the second sub-pixel column has closer proximity to the second data line (d4 < d3) creates a counterbalancing effect that equalizes the overall coupling capacitance, thereby maintaining display brightness uniformity while ensuring sufficient signal coupling strength.
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 design improves display quality by minimizing color and brightness differences across the panel, effectively addressing the end color shift problem and maintaining a low cost and compact structure.
Implementation Method 1
inconsistent coupling capacitances
Implementation Method 2
coupling capacitances between data signal lines and pixel electrodes
Data Source
AI summary
A touch display panel and an electronic device are provided, the touch display panel includes a first data line, a second data line, a first touch line, a second touch line, a first sub-pixel column, a second sub-pixel column, a third sub-pixel column, and a fourth sub-pixel column. A distance from the first sub-pixel column to the first data line a right side of the first sub-pixel column is a first distance, a distance from the second sub-pixel column to the first data line on a left side of the second sub-pixel column is a second distance, and the first distance is smaller than the second distance. A distance from the third sub-pixel column to the second data line is a third distance, a distance from the fourth sub-pixel column to the second data line is a fourth distance, and the third distance is greater than the fourth distance.