OLED Signal Blocking Metal Wiring for Short Circuit Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic light emitting diode displays are prone to short circuits between the cathode and anode due to external pressure, leading to local burning and defects, which existing technologies fail to adequately prevent.
Innovation Solution
Incorporating signal blocking metal wirings on both side edges of the organic emission layers, between the first electrode and the second electrode, and an insulation layer to prevent electrical connection, which diverts power and prevents local burning when a short circuit occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate wiring structure is added to block short circuits, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent divides the electrode structure into multiple segments by introducing signal blocking metal wirings that separate the first electrode and second electrode into distinct regions. These wirings create electrical isolation zones that prevent short circuit propagation while maintaining the functional integrity of the OLED structure.
Solution Approach 2:
The signal blocking metal wirings act as intermediary elements positioned between the first electrode and second electrode. These intermediaries serve as electrical barriers that prevent direct contact and short circuiting between opposing electrodes, while the insulation layer provides additional mediatory protection.
2Reliability
If signal blocking metal wirings are added to prevent short circuits, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The signal blocking metal wirings are merged with the existing electrode structure and insulation layers to form an integrated multi-layer configuration. This combining approach allows the short circuit prevention function to be achieved through standard OLED manufacturing processes without requiring entirely new fabrication techniques.
Solution Approach 2:
The metal wiring structure serves multiple functions: it acts as both a signal blocking barrier to prevent short circuits and as part of the overall electrode architecture. This multi-functionality reduces the need for separate dedicated short circuit prevention components, simplifying the manufacturing process.
3Reliability
If metal wirings are placed between electrodes, then short circuit prevention is improved, but electrical connection may be compromised
Solution Approach 1:
The signal blocking metal wirings are strategically positioned only in specific regions where short circuit prevention is needed, rather than uniformly across the entire electrode structure. This localized approach ensures electrical isolation where required while maintaining uninterrupted power flow in functional emission regions.
Solution Approach 2:
The harmful electrical connection pathway between first and second electrodes is extracted and removed by introducing the signal blocking metal wirings. These wirings effectively take out the short circuit risk by creating intentional electrical discontinuities at critical interfaces while preserving necessary electrical connections for OLED operation.
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
Effectively inhibits local burning and defects by cutting power to the display when a short circuit is generated, ensuring the display remains functional under external pressure.
Implementation Method 1
an insulation layer disposed on the metal wirings and configured to prevent an electrical connection between the second electrode and the metal wirings
Implementation Method 2
Electrons injected from a cathode, which is one electrode, and holes injected from an anode, which is the other electrode, are combined in an organic light emitting member to form excitons, and light is emitted while the excitons discharge energy
Data Source
AI summary
An organic light emitting diode display including a first electrode disposed in a display area of a display panel, and electrically connected to a transistor connected to a gate wiring and a data wiring; a pixel definition film provided on the display panel, and having an opening through which the first electrode is exposed; organic emission layers disposed on the first electrode; column spacers disposed on non-display areas of the display panel, and disposed on the pixel definition layer; a second electrode disposed on the organic emission layers and the column spacers; and signal blocking metal wirings disposed on both side edges of the organic emission layers, and disposed between the first electrode and the second electrode.