AMOLED Edge Pixel Shielding for Threshold Voltage Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In active matrix organic light-emitting diode (AMOLED) display panels, the voltage on the conductive connection portion of threshold compensation transistors near the edge is unstable due to the absence of a shielding block, leading to voltage jumps that affect leakage current and display quality.
Innovation Solution
A first shielding block is provided in the dummy pixel unit, connected to a first signal line to supply a constant voltage, forming a capacitor with the conductive connection portion of the display pixel unit at the edge, stabilizing the voltage and preventing leakage current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shielding block is not provided in the dummy pixel unit, then the device complexity is reduced, but the voltage stability of threshold compensation transistors at the edge deteriorates
Solution Approach 1:
The display panel is divided into display pixel units and dummy pixel units. The shielding block is selectively provided only in the dummy pixel unit, not in the display pixel unit. This segmentation allows the shielding function to be implemented with minimal impact on the overall device complexity, while still providing voltage stability where needed.
Solution Approach 2:
A shielding block is introduced as an intermediary element between the dummy pixel unit and the display pixel unit. This shielding block acts as a mediator that provides voltage stabilization to the threshold compensation transistor in the display pixel unit at the edge, without requiring the shielding block to be part of the display pixel unit's active structure.
2Stability of the object's composition
If a shielding block is provided in the dummy pixel unit, then the voltage stability of threshold compensation transistors is improved, but the device complexity increases
Solution Approach 1:
The display panel is divided into display pixel units and dummy pixel units. The shielding block is selectively provided only in the dummy pixel unit, not in the display pixel unit. This segmentation allows the shielding function to be implemented with minimal impact on the overall device complexity, while still providing voltage stability where needed.
Solution Approach 2:
The dummy pixel unit is created as a simplified copy or replica of the display pixel unit, but without the full functional components. The shielding block in the dummy pixel unit serves as a structural element that replicates the shielding function without requiring the complete display pixel unit structure, thereby minimizing the increase in device complexity.
3Ease of manufacture
If no shielding block is provided, then the manufacturing process is simplified, but voltage jumps occur affecting leakage current
Solution Approach 1:
The display panel is divided into display pixel units and dummy pixel units. The shielding block is selectively provided only in the dummy pixel unit, not in the display pixel unit. This segmentation allows the shielding function to be implemented with minimal impact on the overall device complexity, while still providing voltage stability where needed.
Solution Approach 2:
A shielding block is introduced as an intermediary element between the dummy pixel unit and the display pixel unit. This shielding block acts as a mediator that provides voltage stabilization to the threshold compensation transistor in the display pixel unit at the edge, without requiring the shielding block to be part of the display pixel unit's active structure.
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 stabilizes the voltage of threshold compensation transistors at the edge, improving display quality by preventing voltage jumps and maintaining consistent leakage current, thus enhancing the overall display effect.
Implementation Method 1
forming a capacitor with the conductive connection portion of the display pixel unit at the edge, stabilizing the voltage
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Provided is a display panel, comprising a display pixel unit (P1) located in a display region (R1), the display pixel unit (P1) comprising a threshold compensation transistor (T3), the threshold compensation transistor (T3) comprising a first channel (CN1) and a second channel (CN2), and the first channel (CN1) and the second channel (CN2) being connected by means of a conductive connection portion (CP); a dummy pixel unit (P0) located in a dummy region (R2), the dummy region (R2) being on one side of the display region (R1), and the dummy region (R2) being a non-light-emitting region; a first signal line (S1) located in the dummy region (R2) and configured to provide a constant voltage; and a first conductive block (BK1) connected to the first signal line (S1). The display pixel unit (P1) comprises a first display pixel unit (P1), the first display pixel unit (P1) is a display pixel unit (P1) adjacent to the dummy pixel unit (P0) in a row direction, and in a plan view of the display panel, the first conductive block (BK1) at least partially overlaps the conductive connection portion (CP) of the threshold compensation transistor (T3) of the first display pixel unit (P1). A display device is further provided.