Bar Antenna Placement on Substrate Rear Face
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional radio-controlled timepieces face challenges in maintaining accurate time reception due to noise interference from electronic components and wiring, which limits the size and resolution of digital display screens when using bar antennas for receiving standard radio waves.
Innovation Solution
The electronic device employs a four-layer substrate configuration where the bar antenna is positioned between the control and connecting sections on a separate wiring layer, with a magnetic shielding region between the antenna and wiring layers to minimize noise interference, allowing for a larger and higher-resolution digital display screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the edge of the substrate is cut to provide space for the antenna, then noise interference from wiring and electronic components is reduced, but the area of the display screen becomes smaller
Solution Approach 1:
The patent moves the antenna from the substrate plane to the rear face of the substrate, utilizing the third dimension (thickness direction) to resolve the spatial conflict between antenna placement and display screen area. This allows the antenna to be positioned away from noise-generating components without reducing the display area.
Solution Approach 2:
A shield electrode is introduced as an intermediary element between the antenna and the noise-generating wiring/electronic components. This shield electrode blocks electromagnetic interference from reaching the antenna, allowing closer proximity placement while maintaining signal quality.
2Object-affected harmful factors
If the antenna is provided on the rear face of the edge of the substrate, then noise reception is reduced, but the width of the connector must be less than the length of the antenna, limiting output terminals
Solution Approach 1:
By positioning the antenna on the rear face of the substrate rather than on the substrate plane, the patent frees up connector width constraints. This spatial reorganization allows connectors to be placed without being limited by antenna length, enabling support for high-resolution display screens with numerous output terminals.
3Volume of moving object
If electronic components and wiring are placed close to the antenna, then device size is reduced, but noise mixing occurs during radio wave reception
Solution Approach 1:
The shield electrode acts as a protective intermediary between the antenna and noise-generating electronic components/wiring. This allows the patent to maintain compact device dimensions while preventing noise mixing through the shielding effect of the electrode positioned between the antenna and干扰 sources.
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 effectively reduces noise interference, enabling the electronic device to receive radio waves accurately while maintaining a large and clear digital display screen, balancing component placement for optimal reception sensitivity and display quality.
Implementation Method 1
the region between the both edge regions on the second layer is a shielding region provided with a magnetic shielding section
Data Source
AI summary
An electronic device includes a display section, at least one substrate, a control section, a connecting section, a receiving section, and output wiring. The at least one substrate includes a plurality of wiring layers overlapped as a whole. Output wiring is provided on the first layer among the plurality of wiring layers and connects each of the plurality of the output terminals and the control section. From a planar view of the substrate, a bar antenna is attached on a face of a second layer on a side opposite of the first layer, in a position between positions corresponding to positions of the connecting section and the control section. The output wiring crosses between regions corresponding to both edge regions including both edges of the bar antenna.