Wireless Charging Structure Integrated with Display Assembly
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Solution Overview
Problem
The existing wireless charging structures in electronic devices face challenges such as increased DC resistance, surface heat generation, and decreased charging efficiency due to the complexity and material costs associated with integrating receive (RX) and transmit (TX) functions, especially when designed for foldable displays where the connection structure of the flexible printed circuit board (FPCB) is difficult to manage.
Innovation Solution
An electronic device design that incorporates a wireless charging structure with a coil portion and transmission wires, integrated with a magnetic plate between the bracket and the FPCB, allowing for efficient charging performance on both the front and rear faces, and includes a shielding structure to prevent electromagnetic interference, thereby simplifying the stack structure and reducing material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless charging structure is disposed to face the rear side of the electronic device, then the charging function is provided, but the connection structure of FPCB becomes difficult to manage and DC resistance increases
Solution Approach 1:
The patent combines the wireless charging structure with the display assembly by integrating the coil portion and magnetic plate into the display assembly stack. This merging eliminates the need for separate FPCB connection structures, reduces DC resistance, and simplifies the overall device architecture while maintaining charging functionality.
Solution Approach 2:
The patent transitions the wireless charging structure from a rear-side disposition to a display-assembly-integrated configuration. By changing the spatial dimension and integration level, the charging structure can now face both front and rear directions, eliminating the need for complex FPCB routing and reducing electrical resistance.
2Reliability
If the wireless charging structure is disposed to face the rear side of the electronic device, then the charging function is provided, but surface heat generation occurs
Solution Approach 1:
The patent integrates the wireless charging structure with the display assembly, allowing heat to be dissipated through the display assembly's thermal management pathways. This combined structure provides better heat sinking and reduces surface heat generation compared to separate rear-side positioning.
3Reliability
If the wireless charging structure is disposed to face the rear side of the electronic device, then the charging function is provided, but charging efficiency decreases
Solution Approach 1:
The patent merges the wireless charging structure with the display assembly, reducing the number of connection interfaces and FPCB layers. This integration minimizes energy loss at connection points and improves overall charging efficiency by eliminating unnecessary electrical pathways.
4Adaptability or versatility
If additional height compensation structures are added due to changes in size and arrangement of the wireless charging structure, then the charging function is adapted, but workability decreases and material costs increase
Solution Approach 1:
The patent combines the wireless charging structure with the display assembly, eliminating the need for separate height compensation structures. The display assembly itself serves as the structural support, simplifying manufacturing and reducing material costs while maintaining adaptability to different device configurations.
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 design enhances charging efficiency, reduces surface heat generation, and lowers material costs by integrating the wireless charging structure within the display assembly, providing improved performance for RX and TX functions in both folded and unfolded states of the device.
Implementation Method 1
Wireless power transmission technology (wireless power transmission or wireless energy transfer) is a technology for transmitting electric energy from a transmitter to a receiver wirelessly using the induction principle of a magnetic field
Implementation Method 2
a wireless charging structure disposed on one face of the second area or inside the second area, the wireless charging structure including a coil portion and transmission wires electrically connected to the coil portion, and a magnetic plate disposed between the bracket and the flexible printed circuit board
Data Source
AI summary
An electronic device is provided. The electronic device includes a housing including a front plate that faces a first direction and a rear plate that faces a second direction, which is opposite the first direction, a display panel configured to output a screen through the front plate, a bracket disposed between the display panel and the rear plate, the bracket being configured to support internal components, a flexible printed circuit board including a first area electrically connected to the display panel, and a second area extending from the first area and disposed between the display panel and the bracket, a wireless charging structure disposed on one face of the second area or inside the second area, the wireless charging structure including a coil portion and transmission wires electrically connected to the coil portion, and a magnetic plate disposed between the bracket and the flexible printed circuit board, and at least one area of the magnetic plate being disposed to face the wireless charging structure.