High Screen Ratio Electric Device with Segmented Housing
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Solution Overview
Problem
Existing electronic devices with touch panels face challenges in achieving a high screen ratio without compromising the reliability of the flexible printed circuit board connections, often requiring significant space for the control chip that reduces the screen ratio.
Innovation Solution
The control chip is positioned on a main circuit board within a separate housing, and a single-sided configuration method is used for the flexible printed circuit board connections in the bending area, allowing for improved screen ratio without reducing product reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the control chip is integrated within the touch panel assembly to improve screen ratio, then the screen ratio is improved, but the reliability of flexible printed circuit board connections deteriorates due to increased bending stress
Solution Approach 1:
The device is divided into two separate housings: the first housing contains the touch panel while the second housing contains the control chip. This segmentation allows the flexible printed circuit board to connect the control chip to the touch panel without requiring the control chip to be integrated within the touch panel assembly, thereby maintaining connection reliability while achieving high screen ratio.
Solution Approach 2:
The flexible printed circuit board serves as an intermediary component that connects the control chip in the second housing to the touch panel in the first housing. This intermediary approach allows signal transmission while physically separating the control chip from the touch panel assembly, resolving the contradiction between integration benefits and connection reliability.
2Reliability
If the control chip is positioned separately from the touch panel, then the flexible printed circuit board connection reliability is improved, but the screen ratio deteriorates due to increased lower frame width
Solution Approach 1:
The control chip is positioned in a different spatial dimension (second housing) relative to the touch panel (first housing), rather than being integrated in the same plane. This dimensional separation allows the flexible printed circuit board to connect the components without occupying screen space, achieving both high reliability and high screen ratio.
Data Source
AI summary
An electric device is provided. The electric device includes a first housing, a second housing, a touch panel, a flexible printed circuit board, a control chip, and a main circuit board. The touch panel is disposed in the first housing. The flexible printed circuit board includes a substrate, a plurality of first connecting lines, a plurality of second connecting lines and a plurality of third connecting lines. The substrate has a first surface and a second surface. The first connecting lines are connected to a first peripheral line on the first surface. The second connecting lines are connected to a second peripheral line on the first surface. The third connecting lines are connected to a third peripheral line on the second surface, and are arranged from the second surface to the first surface through a plurality of first through holes.