OLED Display Panel EMI Shielding Cover for Signal Interference
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Solution Overview
Problem
Conventional OLED display panels face signal interference issues due to the thinning of the thin film encapsulation (TFE) film layer, which affects the normal display function of OLED light-emitting devices as electrodes are easily interfered by adjacent touch electrodes.
Innovation Solution
The implementation of an electromagnetic interference (EMI) shielding cover that encloses the OLED light-emitting device and touch electrode, preventing signal interference regardless of the TFE film layer thickness, using a combination of metal, metal alloy, or non-metal conductive materials for the EMI shielding cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the TFE film layer thickness is reduced to improve flexibility, then the flexibility of OLED light-emitting devices is improved, but signal interference between touch electrodes and OLED electrodes occurs
Solution Approach 1:
An EMI shielding layer is introduced as an intermediary component between the touch electrode and the OLED light-emitting device. This shielding layer, made of conductive material, acts as a mediator that blocks electromagnetic signals from the touch electrode from interfering with the OLED electrodes, while allowing the thin TFE film structure to maintain its flexibility.
Solution Approach 2:
The encapsulation structure is segmented into multiple functional layers: the TFE film layer for flexibility and encapsulation, and a separate EMI shielding layer for electromagnetic interference protection. This segmentation allows each layer to perform its specific function independently, resolving the contradiction between flexibility and signal interference.
2Length of stationary object
If the TFE film layer thickness is reduced to maintain flexibility, then the overall thickness is reduced, but electrodes are easily interfered by adjacent touch electrodes
Solution Approach 1:
The EMI shielding layer serves as a protective intermediary that blocks charge induction and electromagnetic interference from touch electrodes from reaching the OLED electrodes. This allows the TFE film layer to remain thin for flexibility without compromising protection against harmful electromagnetic effects.
Solution Approach 2:
The EMI shielding layer is positioned in advance between the touch electrode and OLED electrodes to prevent charge induction interference before it can affect the OLED operation. This preliminary protective action blocks harmful electromagnetic fields from reaching sensitive components.
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 EMI shielding cover effectively reduces signal interference between the touch electrode and the OLED light-emitting device electrodes, maintaining display functionality even with a thinned TFE film layer, ensuring reliable operation of OLED display panels.
Implementation Method 1
an electromagnetic interference (EMI) shielding cover, wherein the first encapsulating layer covers the OLED light-emitting device, the EMI shielding cover encloses the first encapsulating layer and the OLED light-emitting device
Data Source
AI summary
The present invention provides an organic light-emitting diode (OLED) display panel, a manufacturing method of the OLED display panel, and a display device. The OLED display panel includes a substrate, an OLED light-emitting device, a first encapsulating layer, an electromagnetic interference (EMI) shielding cover, a second encapsulating layer, and a touch electrode. The OLED light-emitting device is arranged on the substrate. The first encapsulating layer covers the OLED light-emitting device. The EMI shielding cover encloses the first encapsulating layer and the OLED light-emitting device. The second encapsulating layer covers the EMI shielding cover. The touch electrode is arranged on the second encapsulating layer.