Polygonal Display Circuit Layout for Non-Overlapping Touch Integration
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Solution Overview
Problem
Existing small size display devices with touch function face interference issues between flexible circuit boards due to overlapping designs, affecting display and touch functions, and require complex bending operations for additional circuit boards.
Innovation Solution
A display device with a polygonal outer contour featuring non-overlapping first and second circuit boards bent at different edges, with anti-electromagnetic interference layers and a symmetrical, integrated backlight structure for improved stability and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple flexible circuit boards are added to achieve both display and touch functions, then the functionality of the display device is improved, but the complexity of the device structure increases and electromagnetic interference occurs due to overlapping arrangements
Solution Approach 1:
The patent transitions from a two-dimensional overlapping arrangement of circuit boards to a three-dimensional spatial separation by bending the second flexible circuit board along a folding line. This allows the second circuit board to be positioned above the first circuit board in the Z-direction, eliminating overlap and electromagnetic interference while maintaining both display and touch functionalities.
Solution Approach 2:
The patent divides the single planar circuit board structure into multiple segmented parts: the first flexible circuit board remains relatively flat, while the second flexible circuit board is folded along a specific folding line. This segmentation allows independent routing and positioning of different circuit functions, reducing interference and simplifying the overall layout.
2Adaptability or versatility
If flexible circuit boards are bent to fit the device structure, then the adaptability to the device form factor is improved, but the manufacturing complexity and difficulty of assembly increase
Solution Approach 1:
The folding line is pre-defined and pre-formed on the second flexible circuit board during the manufacturing process. This preliminary action allows the bending operation to be performed earlier in the manufacturing sequence, before final assembly, thereby reducing the difficulty of subsequent assembly operations and improving ease of manufacture.
3Area of stationary object
If circuit boards are arranged in overlapping configurations, then the device footprint is reduced, but electromagnetic interference occurs affecting display and touch functions
Solution Approach 1:
The patent resolves the electromagnetic interference problem by moving the second circuit board from the same plane (2D arrangement) to a different vertical level (3D arrangement). The folding line creates a spatial separation where the second circuit board is positioned above the first, eliminating electromagnetic coupling while maintaining a compact overall device footprint.
Data Source
AI summary
The present disclosure relates to a display device with an outer contour of a polygon. The display device includes: a display panel; a functional panel on a side of a light exiting surface of the display panel; a first circuit board electrically connected to the display panel and bent at a first edge of the polygon to a side of the display panel away from the light exiting surface of the display panel; and a second circuit board electrically connected to the functional panel and bent at a second edge of the polygon to the side of the display panel away from the light exiting surface of the display panel, wherein the first edge and the second edge are different edges, and an orthographic projection of the first circuit board on the light exiting surface of the display panel does not overlap with an orthographic projection of the second circuit board on the light exiting surface of the display panel.