Touch Display Lead Layout for Electromagnetic Interference Reduction
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Solution Overview
Problem
Existing touch control technologies in electronic devices, particularly in vehicle OLED display modules, emit significant electromagnetic interference that exceeds radiation limits, interfering with in-vehicle electronic devices, and are costly due to reliance on external attachments and flexible multi-layer structures.
Innovation Solution
A touch display module design featuring a first lead and a second lead with opposite signal direction and frequency, integrated within a non-display area, to counteract electromagnetic interference by generating opposing electromagnetic fields, utilizing a signal amplification module to optimize signal strength and direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If flexible multi-layer structures are introduced to reduce touch control costs, then manufacturing cost is reduced, but electromagnetic radiation increases significantly
Solution Approach 1:
The patent applies the second lead to convert the harmful electromagnetic radiation into a beneficial effect by generating an opposing electromagnetic field that cancels out the radiation from the first lead. The second lead receives a second signal with the same frequency but opposite direction, transforming the harmful radiation into a counteracting force that reduces overall electromagnetic interference.
Solution Approach 2:
The patent implements preliminary anti-action by pre-configuring the second lead with the second signal that opposes the first signal before the electromagnetic interference occurs. This preventive measure ensures that the electromagnetic radiation is counteracted in advance, preventing interference with other electronic devices rather than addressing it after the fact.
2Reliability
If touch drive signal strength is increased to improve touch performance, then touch sensitivity is improved, but electromagnetic radiation increases and interferes with electronic devices
Solution Approach 1:
The patent converts the harmful electromagnetic interference generated by strong touch drive signals into a beneficial effect. The second lead generates an opposing electromagnetic field that cancels out the interference, allowing the system to maintain strong touch drive signals for improved touch performance while eliminating the harmful radiation through the counteracting second signal.
3Adaptability or versatility
If external attachments are used for touch control, then touch control functionality is achieved, but manufacturing cost increases
Solution Approach 1:
The patent merges the touch control functionality directly into the display module by integrating the first and second leads within the display structure. This eliminates the need for separate external attachments, combining multiple functions into a single integrated system that reduces manufacturing cost while maintaining touch control capabilities.
Solution Approach 2:
The patent implements multi-functionality by designing the display module to simultaneously serve as both the display and touch control interface. The first and second leads are integrated into the display structure, allowing the same component to perform multiple functions - displaying visual information and detecting touch input - thereby eliminating the need for separate external touch control attachments.
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
Reduces electromagnetic interference radiation, minimizing interference with in-vehicle electronic devices while maintaining effective touch performance and reducing costs by integrating the leads within the display module structure.
Implementation Method 1
a second lead, an orthographic projection of the second lead on the base substrate is on a side of an orthographic projection of the first lead on the base substrate away from the display area, the second lead being configured to input a second signal, the second signal having a same frequency and being in an opposite direction with the first signal
Data Source
AI summary
Disclosed is a touch display module, the touch display module having a display area, and a non-display area that is connected to the display area. The touch display module comprises a first lead and a second lead, the second lead being disposed at a side of the first lead distant from the display area, a second signal is loaded on the second lead, the second signal having the same frequency as, but the opposite direction to, a first signal loaded on the first lead; the second signal can generate electromagnetic interference radiation opposite to that of the first signal, to weaken electromagnetic interference radiation generated by the first signal, thereby reducing the electromagnetic interference radiation of the touch display module and reducing interference with electronic devices. Also disclosed are a touch display apparatus and an electronic device.