Display Shield Line Reduces Crosstalk and Compensation Time
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Solution Overview
Problem
High-resolution display devices face challenges in increasing the time for threshold voltage compensation due to crosstalk between signal lines, which affects image quality and display performance.
Innovation Solution
The implementation of a pixel structure that includes a shield line connected to a constant voltage line, a driving voltage line, and an initialization voltage line, which helps reduce crosstalk by providing a constant voltage and separate power voltages to prevent signal coupling between adjacent data lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of display devices is increased, then the image quality is improved, but the line time for driving a single row decreases and the time for compensating threshold voltage becomes insufficient
Solution Approach 1:
The patent segments the data signal transmission by introducing a first data line and a second data line that are spatially separated and parallel to each other. This segmentation allows independent signal transmission paths, reducing mutual interference and enabling sufficient compensation time for each line without compromising overall display resolution.
Solution Approach 2:
The patent introduces a shield line as an intermediary element positioned between the first data line and the second data line. This shield line acts as a mediator that blocks electromagnetic interference between the two data lines, allowing them to be placed closer together while still maintaining signal integrity and adequate compensation time.
2Area of stationary object
If signal lines are placed closer together to reduce pixel area, then the display device size is reduced, but crosstalk between signal lines increases
Solution Approach 1:
The shield line serves as an intermediary barrier positioned between the first data line and the second data line. It blocks electromagnetic fields from one data line from interfering with the other, enabling the data lines to be placed closer together to reduce pixel area while preventing crosstalk.
Solution Approach 2:
The patent applies local quality by providing the shield line specifically in the region between the two data lines where crosstalk occurs, rather than shielding the entire display structure. This localized approach reduces pixel area while effectively preventing crosstalk where it is most problematic.
3Object-affected harmful factors
If a shield line is added to reduce crosstalk, then signal coupling is minimized, but the device complexity increases
Solution Approach 1:
The patent merges the shield line function with the existing data line structure by positioning the shield line parallel to and between the first and second data lines. This integration approach minimizes additional complexity while effectively reducing signal coupling between the data lines.
Solution Approach 2:
The shield line is designed with homogeneous electrical connection to voltage lines at both ends, creating a uniform electromagnetic shielding effect along the entire length of the data lines. This homogeneous design simplifies the overall structure by using consistent connection methods rather than varying shielding approaches.
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 configuration enhances the compensation time for threshold voltage and reduces signal coupling, leading to improved display quality and reduced manufacturing costs by minimizing the number of output lines and integrated circuits required.
Implementation Method 1
a shield line extending in the first direction on an outer side of the first data line or the second data line... The shield line may be electrically connected to a voltage line providing a constant voltage
Data Source
AI summary
This application relates to a display device. In one aspect, the display device includes a first data line extending in a first direction; and a second data line spaced apart from and parallel to the first data line. The display device also includes a pixel circuit electrically connected to one of the first and second data lines, and a shield line extending in the first direction and not disposed between the first and second data lines.