OLED Display Panel Electromagnetic Shielding Structure
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Solution Overview
Problem
The excessive thinning of the thin-film encapsulation (TFE) layer in OLED display panels leads to a short distance between the touch layer and the array layer, causing charge induction and display abnormalities due to interference from electrodes in the touch layer with the circuits in the array layer.
Innovation Solution
An electromagnetic shielding structure is introduced, with the array layer positioned inside and the touch layer outside, using a hollow mesh structure composed of conductive materials like aluminum, silver, or indium tin oxide to enclose the array layer and shield external electromagnetic signals, ensuring the array layer is not interfered with by touch layer signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the thin-film encapsulation (TFE) layer is thinned to reduce OLED panel thickness, then the overall panel thickness is reduced, but the distance between the touch layer and array layer becomes too short, causing charge induction and display abnormalities
Solution Approach 1:
An electromagnetic shielding layer is introduced as an intermediary component between the touch layer and array layer. This shielding layer, positioned within the thinned TFE structure, blocks electromagnetic interference and charge induction between the two functional layers, enabling the panel to maintain both reduced thickness and normal display operation
Solution Approach 2:
The patent employs a thinned thin-film encapsulation (TFE) layer combined with an integrated electromagnetic shielding film. This thin-film structure maintains the flexibility and bendability required for flexible OLED displays while incorporating electromagnetic shielding functionality to prevent interference between closely spaced layers
2Device complexity
If the distance between touch layer and array layer is reduced to achieve thinner panel, then manufacturing complexity is reduced, but electromagnetic interference causes display abnormalities
Solution Approach 1:
The electromagnetic shielding function is merged into the thin-film encapsulation structure by integrating a conductive shielding layer within the TFE stack. This combination approach maintains structural simplicity while effectively blocking electromagnetic interference between the touch and array layers at close distances
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 effectively shields external electromagnetic wave signals, preventing interference with the array layer circuits and maintaining normal display functionality even with a reduced distance between the array and touch layers, thus ensuring the integrity of the OLED panel's display.
Implementation Method 1
an electromagnetic shielding structure; an array layer disposed inside the electromagnetic shielding structure; and a touch layer disposed outside the electromagnetic shielding structure... external electromagnetic wave signal interference can be effectively shielded by the electromagnetic shielding structure
Implementation Method 2
a hollow mesh structure composed of conductive materials like aluminum, silver, or indium tin oxide
Data Source
AI summary
The present application discloses a display panel, including an electromagnetic shielding structure; an array layer disposed inside the electromagnetic shielding structure; and a touch layer disposed outside the electromagnetic shielding structure and positioned on one side of the electromagnetic shielding structure.