Display Device Driving Voltage Line Crosstalk Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As the resolution of display devices increases, the number of signal lines increases, leading to narrower spacing between them, which results in crosstalk between signal lines, affecting the performance of organic light emitting display devices.
Innovation Solution
The implementation of a display device design that includes a first and second data line, transistors, a connecting line, and a driving voltage line, with trenches in the insulation layer to minimize crosstalk, where the driving voltage line extends into these trenches and is positioned between the data lines and the connecting line, and a capacitor with electrodes connected to the connecting line and driving voltage line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of signal lines is increased to achieve higher resolution, then the resolution is improved, but the spacing between signal lines becomes narrower causing crosstalk
Solution Approach 1:
A ground line is introduced as an intermediary element between adjacent signal lines (data lines and connecting lines). This ground line acts as a shield that intercepts and redirects electromagnetic fields, preventing direct coupling between signal lines. The ground line is connected to ground potential through grounding structures, creating a reference potential that reduces voltage fluctuations and minimizes crosstalk interference between neighboring signal lines.
Solution Approach 2:
The harmful electromagnetic fields between signal lines are extracted and redirected to ground through the ground line. By providing a dedicated path to ground, the interfering electric fields are removed from the signal transmission path and dissipated safely, preventing them from coupling into adjacent signal lines and causing crosstalk.
2Area of moving object
If the spacing between signal lines is reduced to increase pixel density, then the pixel density is improved, but electrical interference between lines increases
Solution Approach 1:
The ground line serves as a mediator structure positioned between closely spaced signal lines. It provides electromagnetic shielding that becomes increasingly effective as line spacing decreases, actively managing the electric fields in the confined space and preventing interference between adjacent lines while allowing high pixel density to be achieved.
Solution Approach 2:
The ground line provides localized electromagnetic shielding specifically at regions where signal lines are closely spaced. The shielding effect is concentrated where needed - between adjacent data lines and between data lines and connecting lines - allowing different regions of the circuit to have different spacing characteristics without compromising overall signal integrity.
Data Source
AI summary
A display device including a first data line and a second data line extending along a first direction, a first transistor connected to the first data line, a second transistor connected to the first transistor, a third transistor electrically connected to the second transistor, a connecting line disposed between the first data line and the second data line, the connecting line connecting the second transistor to the third transistor, and a driving voltage line disposed on the connecting line, the driving voltage line extending between the first data line and the connecting line.