Balancing Capacitance Structure for Display Panel Crosstalk
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Solution Overview
Problem
Liquid crystal display panels face significant picture crosstalk due to large differences in coupling capacitance values between pixel electrodes and data lines, which cannot be completely offset by existing column inversion methods, resulting in voltage variations and display issues.
Innovation Solution
A display panel design incorporating a balancing capacitance part with first and second balancing subparts, each comprising specific electrodes connected to the pixel electrode and data lines, allowing for adjustment of overlapping areas to balance coupling capacitance values, thereby reducing differences and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If column inversion method is adopted to offset coupling capacitance values, then picture crosstalk is improved, but large difference in coupling capacitance values between pixel electrode and data lines remains, resulting in incomplete voltage offset
Solution Approach 1:
The balancing capacitance part is divided into first and second balancing subparts, each with separate electrodes (first, second, third, fourth electrodes) that can be independently adjusted. This segmentation allows precise control of coupling capacitance values on both sides of the pixel electrode, enabling fine-tuning to compensate for manufacturing variations and achieve better voltage offset.
Solution Approach 2:
The overlapping areas between electrodes in the balancing capacitance part are designed to be adjustable, allowing dynamic optimization of coupling capacitance values. By modifying the overlapping areas of the first, second, third, and fourth electrodes, the system can adapt to process variations and achieve balanced voltage offset, thereby reducing picture crosstalk effectively.
2Manufacturing precision
If overlapping areas of balancing capacitance part are increased to adjust capacitance values, then coupling capacitance balance is improved, but device complexity increases
Solution Approach 1:
The balancing capacitance part is integrated into the existing display panel structure, combining the capacitance balancing function with the pixel electrode and data line layout. The first and second electrodes are positioned on one side of the pixel electrode while the third and fourth electrodes are on the other side, merging multiple functions into a unified structure that reduces overall device complexity.
Solution Approach 2:
The balancing capacitance part serves multiple functions: it balances coupling capacitance values, compensates for process variations, and reduces picture crosstalk. By designing the first, second, third, and fourth electrodes to overlap with data lines and pixel electrodes, the structure achieves capacitance balancing while maintaining compatibility with the existing display panel architecture, thereby avoiding significant increases in device complexity.
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
The solution effectively reduces the difference in coupling capacitance values between the pixel electrode and data lines, minimizing picture crosstalk and enhancing the display effect by allowing for precise adjustment of capacitance values through the balancing subparts.
Implementation Method 1
a balancing capacitance part including a first balancing subpart and a second balancing subpart which are disposed corresponding to each of the subpixels, the first balancing subpart includes a first electrode and a second electrode, the second balancing subpart includes a third electrode and a fourth electrode; the first electrode and the third electrode are electrically connected to the main pixel electrode, the second electrode is electrically connected to one data line at one side of one of the subpixels, and the fourth electrode is electrically connected to another data line at another side of the one of the subpixels
Data Source
AI summary
The present application provides a display panel and a display device. The display panel includes a main pixel electrode, a data line, a scan line and a balancing capacitance part. The balancing capacitance part includes a first balancing subpart and a second balancing subpart which are disposed corresponding to each of the subpixels. The first balancing subpart includes a first electrode and a second electrode that are connected to the main pixel electrode and one data line at one side of the main pixel electrode, respectively. The second balancing subpart includes a third electrode and a fourth electrode that are connected to the main pixel electrode and another data line at another side of the main pixel electrode, respectively.