Interference Shielding Module for Touch Display Signal Isolation
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Solution Overview
Problem
Handheld electronic devices with capacitive touch display panels face mutual signal interference issues due to limited hardware resources, which complicates the detection of touch events and affects the performance of 3D display functions.
Innovation Solution
An electronic device incorporating a touch display panel, a touch controller, a parallax switching barrier, and an interference shielding module, where the interference shielding module detects the touch sensing signal to delay the switching of parallax switching signals, preventing interference with the touch sensing signal and allowing for effective 3D image display without mutual signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the device size is reduced to achieve a compact appearance, then the portability is improved, but mutual interference among electronic signals increases
Solution Approach 1:
An interference shielding module is introduced as an intermediary component between the parallax switching barrier and the touch display panel. This shielding module blocks electromagnetic interference from the parallax switching signals, preventing them from affecting the touch sensing signals while allowing the device to maintain a compact form factor with reduced signal interference
2Adaptability or versatility
If the parallax switching signal level is switched periodically to enable 3D display, then the 3D display function is achieved, but interference with touch sensing signals occurs
Solution Approach 1:
The interference shielding module serves as a mediator that selectively blocks electromagnetic interference from the parallax switching signals while allowing optical display functions to proceed normally. This enables the system to maintain both 3D display capability and accurate touch sensing by filtering out harmful electromagnetic interference
Solution Approach 2:
The interference shielding module is positioned in advance between the parallax switching barrier and the touch display panel to preemptively block electromagnetic interference before it can affect the touch sensing signals. This preliminary shielding action prevents signal interference from occurring in the first place
Data Source
AI summary
An electronic device includes: a touch controller, periodically providing a touch sensing signal in a touch sensing period to a touch display panel for touch detection; a control core, periodically switching a level of a parallax switching signal; a parallax switching barrier, for respectively barricading a right-eye display zone and a left-eye display zone on the touch display panel in a left-eye display period and a right-eye display period in response to the parallax display switching signal; and an interference shielding module, for delaying the level switching of the parallax switching signal of the control core when a starting point of the touch sensing signal is detected, so as to prevent the level switching of the parallax switching signal from being triggered in the touch sensing period.