OLED Array Substrate Electrostatic Discharge Protection
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Solution Overview
Problem
Existing OLED array substrates are susceptible to damage from electrostatic charges generated during the cathode deposition process, leading to potential short circuits and defects in the display panel.
Innovation Solution
Incorporating switch modules connected to electrostatic discharge lines between conductive areas and the cathode of OLEDs, which discharge electrostatic charges when generated, reducing damage and improving manufacturing yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional array substrate structure is used, then device simplicity is maintained, but susceptibility to electrostatic charge damage increases
Solution Approach 1:
The patent introduces electrostatic discharge lines as intermediary elements between the cathode and common electrode, and between signal lines and ground. These discharge lines act as mediators that safely conduct electrostatic charges away from sensitive circuit components, preventing damage while maintaining overall device reliability.
Solution Approach 2:
The patent segments the array substrate into distinct functional regions: display areas with OLED structures, peripheral areas with electrostatic discharge lines, and isolated conductive areas. This segmentation allows electrostatic discharge paths to be separated from sensitive circuit areas, enabling protection without compromising device functionality or excessive complexity.
2Reliability
If electrostatic discharge protection structures are added, then reliability against electrostatic damage is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the electrostatic discharge protection function with existing substrate structures. The electrostatic discharge lines are integrated into the peripheral regions alongside common electrodes and signal lines, utilizing shared manufacturing processes and materials where possible, thereby reducing additional manufacturing complexity while achieving reliable electrostatic protection.
3Object-affected harmful factors
If switch modules are connected between conductive areas and cathode, then electrostatic charge discharge capability is improved, but device complexity increases
Solution Approach 1:
The patent introduces switch modules as intermediary control elements between the conductive areas and the cathode. These switch modules act as controlled conduits that can selectively connect or disconnect electrostatic discharge paths, enabling precise control over charge dissipation while protecting the cathode from harmful electrostatic impacts.
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 effectively reduces damage from electrostatic charges during cathode deposition, enhancing the reliability and performance of OLED array substrates by ensuring safe discharge of electrostatic voltage, thereby improving the manufacturing yield of display panels.
Implementation Method 1
the electrostatic voltage generated thereby turning on the switch modules so that the generated electrostatic charges may be discharged through the electrostatic discharge lines
Data Source
Figure 1~2
Figure 3a~3b
Figure 4a~5
AI summary
The present disclosure provides an organic light-emitting diode (OLED) array substrate. The OLED array substrate includes a display area with OLEDs arranged in arrays, electrostatic discharge lines, and peripheral electrostatic discharge areas with conductive areas electrically connected to a cathode of the OLEDs and electrically connected to the electrostatic discharge lines through switch modules.