Display Pixel Control Line Layout for Uniform Driving Voltage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic light-emitting display devices face challenges in efficiently transmitting driving voltage and data signals due to parasitic capacitance and voltage deviations, leading to image quality defects such as color deviation and stains.
Innovation Solution
The display device incorporates a semiconductor area with a driving gate electrode, a shielding area, and a control line with a detour portion that overlaps the data line, forming a capacitor to maintain voltage and reduce parasitic capacitance, ensuring uniform voltage transmission and minimizing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control line is configured to overlap the data line forming a capacitor, then voltage uniformity is improved and parasitic capacitance is reduced, but the device structure becomes more complex
Solution Approach 1:
The control line is divided into a main line portion extending in the first direction and a detour portion including a first portion extending in a second direction. This segmentation allows the control line to form a capacitor with the data line while maintaining the overall signal transmission path, thereby improving voltage uniformity without completely redesigning the control line structure.
Solution Approach 2:
The control line transitions from a single-direction extension to a multi-dimensional path by adding the detour portion that extends in a second direction crossing the first direction. This dimensional change enables the control line to overlap and form a capacitor with the data line, improving voltage uniformity through capacitive coupling while maintaining signal transmission functionality.
2Reliability
If the semiconductor area includes channel regions overlapping both the driving gate electrode and the detour portion, then voltage maintenance is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The first channel region and second channel region are integrated into a single semiconductor area, allowing both channel regions to overlap with different portions of the control line (driving gate electrode and detour portion respectively). This merging enables simultaneous voltage maintenance through capacitive coupling while simplifying the semiconductor fabrication process compared to creating separate semiconductor structures.
Solution Approach 2:
The semiconductor area serves multiple functions by including channel regions that overlap with both the driving gate electrode and the detour portion. This multi-functional design allows the semiconductor area to participate in voltage maintenance through capacitive coupling while maintaining transistor functionality, thereby improving voltage maintenance without requiring entirely separate structures.
3Object-affected harmful factors
If the shielding area is added to overlap the data line, then parasitic capacitance is reduced, but the device area increases
Solution Approach 1:
The shielding area acts as an intermediary element between the control line and the data line. By overlapping the data line and being connected to the driving voltage line, the shielding area provides electrostatic shielding that reduces parasitic capacitance between the control line and data line, thereby reducing harmful electromagnetic interference without requiring complete isolation structures.
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 display device's ability to maintain uniform driving voltage transmission, reduces parasitic capacitance, and prevents image quality defects like color deviation and stains, improving overall display performance.
Implementation Method 1
a control line including a main line portion and a detour portion, the main line portion extending in the first direction and the detour portion including a first portion extending in a second direction crossing the first direction
Implementation Method 2
a shielding area overlapping the first data line... The shielding area may be connected to the driving voltage line and is to receive a driving voltage
Implementation Method 3
The driving voltage line may include an expansion area extending in the first direction, the expansion area overlapping the driving gate electrode to form a capacitor
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A display device includes a driving gate electrode, a scan line separate from the driving gate electrode, a data line, a driving voltage line, and a semiconductor area including a first channel region overlapping the driving gate electrode and a shielding area overlapping the first data line. The display device also has a control line which includes a main line portion and a detour portion. The main line portion and the detour portion extend in different directions, and the semiconductor area includes a second channel region overlapping the first portion of the detour portion.