Display Driver Chip Interference Control for Wi-Fi Screen Projection
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Solution Overview
Problem
Full-screen mobile devices face radio frequency interference issues due to the integration of a driver-integrated chip in the display, which affects the antenna's receiving sensitivity, particularly when using cellular mobile networks or Wi-Fi, as the frequency division and multiplication points of the mobile industry processor interface (MIPI) interfere with the radio frequency antenna.
Innovation Solution
A method is implemented to detect electromagnetic interference between the Wi-Fi module and the MIPI of a display in electronic devices, prompting the user to turn off the display and perform screen-projection to a target device, thereby avoiding interference and improving communication stability during screen-projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the driver-integrated chip of the display is integrated into the antenna clearance area, then the display area is increased, but electromagnetic interference occurs between the MIPI frequency and the radio frequency antenna
Solution Approach 1:
The patent extracts the display driver chip from the antenna clearance area and places it in a non-clearance area, thereby removing the source of electromagnetic interference while maintaining the full-screen display effect. This spatial separation resolves the contradiction between maximizing display area and avoiding electromagnetic interference.
Solution Approach 2:
The patent introduces an intermediary mechanism (frequency adjustment or shielding) between the MIPI signal and the radio frequency antenna to mitigate electromagnetic interference. This allows the driver chip to remain in position while reducing its harmful electromagnetic effects on the antenna.
2Reliability
If the display is turned off to avoid electromagnetic interference, then communication stability is improved, but user interaction capability is reduced
Solution Approach 1:
The patent implements dynamic control of the display state based on communication requirements. The display can be selectively turned off during critical wireless communication operations and reactivated when interference is not an issue, thereby maintaining both communication stability and user interaction capability under different conditions.
3Ease of operation
If screen-projection is performed with the display on, then user convenience is maintained, but electromagnetic interference affects data transmission reliability
Solution Approach 1:
The patent performs preliminary detection of electromagnetic interference conditions before initiating screen-projection. If interference is detected, the system proactively adjusts the display state or frequency parameters in advance, preventing transmission issues while maintaining user convenience during the actual projection operation.
Data Source
AI summary
A method for electromagnetic interference control and related devices are provided. The method includes the following. Electromagnetic interference between a Wi-Fi module and a MIPI of a display of the electronic device is detected in response to detecting a request for screen-projection to a target screen-projection device. In response to the detected electromagnetic interference, the display is turned off, and screen-projection to the target screen-projection device is performed, where the first prompt message indicates that the electronic device is turning off the display and performing screen-projection to the target screen-projection device.