Curved Watch Antenna Layout to Avoid Metal Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In electronic timepieces, antennas under a display screen often suffer from reduced transmission/reception sensitivity due to interference from metallic components, making it difficult to adjust their position effectively, especially with large display pixels.
Innovation Solution
A timepiece module design featuring a curved antenna pattern that overlaps the display screen, with the antenna component extending from it positioned such that it does not overlap with metallic components, allowing for improved sensitivity by maintaining radio wave transmission/reception efficiency without significant frequency adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the antenna is disposed under a display screen to save space, then the device complexity is reduced, but the transmission/reception sensitivity of the antenna deteriorates due to interference from metallic components
Solution Approach 1:
The patent applies local quality by creating a metallic component-free zone specifically at the antenna position under the display screen. While metallic components are present in other areas of the device, a localized region is designated as free from metallic components to ensure optimal antenna performance. This resolves the contradiction by maintaining device compactness while preserving local transmission/reception sensitivity through selective metallic component placement.
2Reliability
If the antenna position is adjusted to avoid metallic components, then the transmission/reception sensitivity is improved, but it becomes difficult to adjust the position when the display screen has a large number of display pixels
Solution Approach 1:
The patent applies preliminary action by pre-designating a metallic component-free zone during the design phase, rather than requiring complex adjustments during assembly. The antenna is positioned in advance within this predetermined safe zone, which is calculated to avoid interference from metallic components. This resolves the contradiction by making the positioning process straightforward and eliminating the difficulty of adjusting antenna position in high-resolution displays with numerous pixels.
3Area of stationary object
If the antenna pattern is made curved to overlap the display screen, then the area utilization is improved, but the interference from metallic components increases
Solution Approach 1:
The patent applies local quality by ensuring that while the curved antenna pattern overlaps the display screen for efficient space utilization, the underlying region remains free from metallic components. The metallic component-free zone is strategically positioned to follow the curved antenna pattern, allowing maximum area utilization while maintaining low interference levels. This resolves the contradiction by decoupling the antenna's spatial efficiency from its interference exposure.
Data Source
Figure 1~2
AI summary
A timepiece module (100) includes a digital display screen (13), an antenna device (11) and a metallic component (12). The antenna device (11) includes an antenna pattern (112) relevant to communication and an antenna component (111) connected to and extending from the antenna pattern (112). In a plan view, the antenna pattern (112) has a curved shape and overlaps the digital display screen (13). The antenna device (11) is disposed such that either one side or other side on a virtual line does not overlap the metallic component (12). The virtual line is an extending direction in which the antenna component (111), which extends from the antenna pattern (112), extends.