Circuit Board Electromagnetic Shielding Layer for Input-Sensor Noise
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Solution Overview
Problem
As the degree of integration of electronic components in devices increases, noise on circuit boards becomes a significant issue, affecting the reliability and sensing sensitivity of input sensors, particularly in devices with high signal line densities.
Innovation Solution
Incorporating an electromagnetic shielding layer on the outermost signal line of a circuit board, along with multiple insulating layers and an anti-reflection layer to reduce noise and enhance sensing sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of signal lines is increased to support higher integration of electronic components, then the functionality and integration degree improve, but the noise level on the circuit board increases
Solution Approach 1:
An electromagnetic shielding layer is introduced as an intermediary component between signal lines to block electromagnetic interference. This shielding layer acts as a mediator that prevents noise from affecting sensitive signal lines while allowing the circuit board to maintain high integration and numerous signal lines for advanced functionality.
2Adaptability or versatility
If the number of pads is increased to connect more electronic components, then the integration capability improves, but the circuit board complexity and noise increase
Solution Approach 1:
The circuit board is segmented into different functional zones using insulating layers and electromagnetic shielding layers. This segmentation allows dense routing of signal lines to multiple pads while isolating noisy regions from sensitive regions, thereby managing complexity and reducing noise interference in high-integration designs.
3Manufacturing precision
If signal lines are routed through multiple insulating layers to achieve detailed patterning, then the manufacturing precision improves, but the noise susceptibility increases
Solution Approach 1:
Signal lines are nested within multiple insulating layers, with electromagnetic shielding layers positioned at specific levels to protect sensitive traces. This nested structure allows for detailed patterning across multiple layers while providing electromagnetic shielding to reduce noise susceptibility of the finely routed signal lines.
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 noise on the circuit board, improving the reliability and sensitivity of input sensors by minimizing interference, thus enhancing the overall performance of electronic devices.
Implementation Method 1
an electromagnetic shielding layer disposed on a portion of the second group signal line
Data Source
AI summary
An electronic device including a display panel which displays an image, an input sensor on the display panel, and including a first sensing electrode, a second sensing electrode crossing the first sensing electrode, first and second signal lines connected to ends of the first sensing electrode, and a third signal line connected to one end of the second sensing electrode, and a circuit board electrically connected to the input sensor. The circuit board includes a plurality of insulating layers, a first group signal line disposed on the plurality of insulating layers, and one end of which is electrically connected to the first signal line, a second group signal line disposed on the plurality of insulating layers, and one end of which is electrically connected to the second signal line, and an electromagnetic shielding layer disposed on a portion of the second group signal line.