Touch Panel Circuit Board Segmentation for EMI Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch panels face reliability issues due to poor anti-electromagnetic interference (EMI) ability, leading to fluctuating sensor signals and increased manufacturing costs to mitigate these issues.
Innovation Solution
The touch panel design separates the touch sensors from the touch control circuit by using two circuit boards, with the touch control circuit on a second board spatially distinct from the first board, reducing electromagnetic interference and improving signal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the touch sensor and touch control circuit are integrated on the same circuit board, then the device complexity is reduced, but the electromagnetic interference from the control circuit affects the touch sensor signals
Solution Approach 1:
The patent divides the circuit system into two separate circuit boards: a first circuit board for the touch sensor and a second circuit board for the touch control circuit. This segmentation physically separates the sensitive sensor from the interfering control circuit, resolving the contradiction by reducing device complexity through modular design while improving signal stability through spatial isolation.
Solution Approach 2:
The patent extracts the touch control circuit from the sensor board and places it on a separate second circuit board. This extraction removes the source of electromagnetic interference from proximity to the touch sensor, thereby maintaining signal stability while still achieving integrated functionality through the connection between the two boards.
2Reliability
If the anti-electromagnetic interference ability is improved by using one-board design with high quality demands, then the signal stability is improved, but the manufacturing cost increases greatly
Solution Approach 1:
By segmenting the circuit into two separate boards, the patent achieves anti-EMI protection through physical separation rather than relying on expensive high-quality shielding materials or complex interference mitigation techniques. This approach improves reliability while maintaining ease of manufacture through standard circuit board fabrication processes.
Solution Approach 2:
The patent introduces a connection interface between the two circuit boards as an intermediary element. This simple connection structure enables signal transmission between the sensor board and control circuit board without requiring complex interference mitigation measures, thereby reducing manufacturing costs while maintaining signal stability.
3Device complexity
If the touch control circuit is placed close to the touch sensor, then the device structure is simplified, but the electromagnetic noise from the control circuit causes signal fluctuation
Solution Approach 1:
The patent segments the circuit arrangement into two separate physical locations (two different circuit boards), thereby eliminating the electromagnetic interference problem that arises from close placement while still maintaining a simplified overall device structure through modular architecture and standard connection interfaces.
Data Source
AI summary
The Present Disclosure provides a touch panel, which consists of a main panel and a light-emitting touch module mounted under the main panel. The light-emitting touch module consists of a first circuit board provided with a plethora of touch sensors and light-emitting devices under the main panel. These touch sensors are used to induce the approaching signals of the operator, and transmit the induction signals to a touch control circuit for controlling the light-emitting status of the corresponding light-emitting device. The light-emitting touch module also consists of a second circuit board, electrically connected with the first circuit board. The touch control circuit is provided on the second circuit board, spatially separated from the first circuit board by a certain distance, so that the electromagnetic interferences of the touch control circuit on the touch sensors may be reduced.