Layered PCB for Flexible Display Bendable Area
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Solution Overview
Problem
Flexible display devices face challenges in maximizing bendable area due to the non-bendable nature of traditional printed circuit boards, which limits the flexibility and size reduction of the display device.
Innovation Solution
A layered structure printed circuit board with multiple boards connected by conductive fillers and anisotropic conductive films, allowing for a reduced size that does not compromise the functionality of integrated circuits and driving chips, and enabling the circuit film to be bent towards the opposite side of the flexible display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a traditional printed circuit board is used, then the electrical connection between the flexible display panel and control circuits is ensured, but the bendable area of the display device is reduced and flexibility is limited
Solution Approach 1:
The printed circuit board is divided into multiple separate boards (first board, second board, third board) that are stacked and connected through conductive fillers. This segmentation allows each board to be smaller and enables the circuit film to bend around them, increasing the bendable area while maintaining electrical connection reliability through the conductive fillers that penetrate through the stacked boards.
2Area of moving object
If the printed circuit board size is reduced, then the bendable area increases, but signal transmission quality may deteriorate
Solution Approach 1:
The patent transitions from a two-dimensional single-board structure to a three-dimensional stacked board structure. Multiple boards are arranged in layers and connected through conductive fillers that extend vertically through the stack. This dimensional change allows signal transmission to occur through multiple layers, maintaining signal quality while enabling the circuit film to bend in the horizontal plane, thus increasing the bendable area without compromising signal transmission.
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 increases the bendable area of the flexible display panel, enhances its flexibility, and minimizes signal attenuation and distortion, thereby improving the device's merchantability and usability.
Implementation Method 1
a conducting portion connecting circuit wires of at least two boards among the plurality of boards. The conducting portion may include a conductive filler penetrating one of the plurality of boards
Implementation Method 2
The conductive member may be formed of an anisotropic conductive film
Data Source
AI summary
A display device includes a flexible display panel for displaying an image, and a printed circuit board electrically connected with the flexible display panel through a circuit film. The printed circuit board may include a plurality of boards in a stack, the boards being respectively provided with integrated circuits, driving chips, and circuit wires, and a conducting portion connecting circuit wires of at least two boards among the plurality of boards.