Foldable Display Shielding Layout for Bend-Area EMI Blocking
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Solution Overview
Problem
Electromagnetic interference occurs in the bending area of display modules, particularly affecting radio wave communication modules, making it difficult to position elements in front of the bending area due to noise interference, and existing methods like conductive tape are inadequate.
Innovation Solution
A display module design incorporating shielding lines and patterns to block electromagnetic interference, including a base member, light-emitting components, first and second lines, circuit insulating layers, and shielding patterns, with specific configurations to electrically connect and overlap with various signal lines to form capacitors and shield against interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conductive tape is used to block electromagnetic interference, then shielding effectiveness is improved, but it is difficult to apply in the bending area and positions other elements
Solution Approach 1:
The shielding structure is divided into multiple segments: shielding lines formed by patterning conductive material on insulating layers, and a shielding pattern connecting these lines. This segmentation allows the shielding to be integrated into the flexible display structure without requiring external conductive tape application.
Solution Approach 2:
The shielding lines and shielding pattern are embedded within the display module structure itself, nested between the bending area and the radio wave communication module. This nested configuration provides shielding without adding external components that would interfere with element positioning.
2Area of stationary object
If elements are positioned in front of the bending area, then device area is reduced, but electromagnetic interference affects radio wave communication module operation
Solution Approach 1:
The shielding lines and shielding pattern serve as an intermediary barrier between the bending area (source of electromagnetic interference) and the radio wave communication module (sensitive component). This mediator blocks electromagnetic interference while allowing the radio wave communication module to be positioned close to the bending area, reducing overall device area.
3Object-affected harmful factors
If shielding lines and patterns are integrated into the display module, then electromagnetic interference is blocked, but device complexity increases
Solution Approach 1:
The shielding lines are formed using the same conductive material and patterning processes as the existing signal lines in the display module. The shielding pattern is integrated into the existing insulating layer structure. This merging of shielding functions with existing structural elements minimizes additional complexity while providing effective electromagnetic interference blocking.
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 design effectively blocks electromagnetic interference in the bending area, allowing the display module to function without malfunctions even when sensitive elements are positioned in front of the bending area, ensuring normal operation of radio wave communication modules.
Implementation Method 1
a shielding line and a shielding pattern configured to block electromagnetic interference occurring in a bending area of the display module
Data Source
AI summary
A display module includes a base member, a plurality of shielding lines and a shielding pattern. The base member is defined with a first area, a second area and a third area. The second area is bent. The plurality of shielding lines overlaps with the second area. The shielding pattern overlaps with the second area and is electrically connected to the shielding lines. Electromagnetic interference generated from the second area is blocked by the plurality of shielding lines and the shielding pattern.