Antenna Circuit Board Layout for Small-Bezel Display Bonding
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Solution Overview
Problem
The challenge is to design a circuit board and antenna package that ensures reliable bonding and circuit connection while maintaining or improving radiation characteristics, especially in display devices with reduced bezel area and thickness.
Innovation Solution
The circuit board features a core layer with distinct regions and antenna power supply wirings arranged in specific patterns, ensuring that the interval between neighboring second portions is 3 times or less of the interval between neighboring third portions, which helps maintain signal independence and reduce the length of the first region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the circuit board is bent to connect with the antenna driving circuit, then the antenna can be connected to the display device, but damage to the wiring and adhesion failure may occur due to bending stress
Solution Approach 1:
The circuit board is divided into a first region for antenna connection and a second region for the antenna driving circuit, with the antenna power supply wirings configured to extend through both regions. This segmentation allows the board to be bent at appropriate locations while maintaining electrical connectivity and reducing stress concentration on critical wiring paths.
2Volume of moving object
If the thickness of the display device is decreased and the bezel area is reduced, then the device becomes more compact, but it becomes difficult to ensure reliable bonding and maintain radiation characteristics of the antenna
Solution Approach 1:
The antenna power supply wirings are configured to extend in both the first region and the second region of the core layer, creating a three-dimensional wiring path that optimizes signal transmission. This multi-dimensional wiring configuration allows the antenna package to maintain reliable bonding and radiation characteristics even when the display device thickness is reduced.
3Length of stationary object
If the interval between neighboring second portions of the antenna power supply wirings is reduced, then the length of the first region can be reduced, but signal disturbance between wirings may occur
Solution Approach 1:
The patent specifies that the interval between neighboring second portions of the antenna power supply wirings is 3 times or less of the interval between neighboring third portions. This parameter control optimizes the balance between reducing the first region length and preventing signal disturbance, achieving compact design while maintaining signal integrity through controlled wiring spacing.
Data Source
AI summary
A circuit board according to an embodiment includes a core layer including a first region and a second region, and antenna power supply wirings disposed on the core layer over the first region and the second region. The antenna power supply wirings may include a first portion extending in a first direction in the first region, a second portion extending in a second direction in the first region, and a third portion extending in the first direction in the second region, and an interval between the neighboring second portions of the antenna power supply wirings is 3 times or less of an interval between the neighboring third portions of the antenna power supply wirings.