Display Panel Driving Line Segmentation for RF Antenna Efficiency
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Solution Overview
Problem
In electronic devices with overlapping RF antennas and display panels, the induced current in the display panel's driving lines reduces the radiated energy of the RF antenna, leading to decreased induced voltage in RFID systems.
Innovation Solution
The display panel includes a larger induction area than the RF antenna's projection area, with parallel and vertical driving lines fragmented by cutting areas to electrically isolate them, reducing the loop path for induced current and minimizing the induced magnetic field's impact on the RF antenna's efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the RF antenna is overlapped with the display panel to minimize device size, then the device compactness is improved, but the induced current in the display panel reduces the radiated energy of the RF antenna
Solution Approach 1:
The display panel's driving lines are divided into multiple segments by introducing cutting areas. These cutting areas electrically isolate the driving lines, breaking the continuous loop path that would otherwise allow induced current to flow. By segmenting the driving lines into isolated sections, the induced current is prevented from forming complete loops, thereby reducing the induced magnetic field that offsets the RF antenna's radiated energy.
2Productivity
If the driving lines are arranged to cover the induction area for complete pixel driving, then the pixel driving coverage is improved, but the loop path for induced current increases
Solution Approach 1:
The driving lines are segmented by cutting areas into multiple electrically isolated sections. Each segment can still perform its pixel driving function independently, maintaining complete pixel driving coverage. However, the segmentation breaks the continuous loop path, preventing induced current from flowing across the entire induction area, thus reducing the induced magnetic field strength.
Solution Approach 2:
The cutting areas are strategically positioned within the induction area to create local electrical isolation. This local modification allows the driving lines to maintain their pixel-driving function in most regions while creating isolated sections specifically where the induction occurs, reducing the overall induced magnetic field without compromising pixel driving coverage.
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
This configuration enhances the work efficiency of the RF antenna by reducing the induced magnetic field's strength, thereby increasing the induced voltage and improving data transmission efficiency in RFID systems.
Implementation Method 1
the magnetic field generated by the RF antenna will induce the induced current within the display panel
Implementation Method 2
the induced current causes an induced magnetic field opposite to the magnetic field of the RF antenna
Data Source
AI summary
A display panel comprises a pixel array, multiple vertical driving lines, multiple parallel driving lines, and a first induction area. The pixel array comprises multiple pixels. One of the multiple parallel driving lines comprises a first driving line and a second driving line. The first induction area comprises part of the pixels, wherein magnetic field of a first RF antenna passes through the display panel via the first induction area, a first projection area is corresponding to a vertical projection of the first RF antenna on the display panel, and the first induction area is larger than the first projection area. The first driving line and the second driving line are configured to drive a first row of pixels among the part of the pixels, and the first driving line and the second driving line are electrically isolated from each other within the first induction area.