Patterned Metal Coating on Display Frame for Antenna and Adhesion
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Solution Overview
Problem
Forming electronic device antenna structures with desired attributes is challenging due to the influence of conductive structures like electronic components and housing, particularly in compact devices, which can interfere with antenna performance and make it difficult to achieve satisfactory performance levels.
Innovation Solution
A patterned metal coating layer is formed on the display frame of electronic devices, which serves as both an adhesion promotion structure and an antenna structure, allowing for improved adhesion and antenna performance without interfering with device size constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive structures such as electronic components and housing structures are present in compact devices, then device functionality is achieved, but antenna performance deteriorates due to interference from these conductive structures
Solution Approach 1:
The display frame is segmented into multiple functional zones: antenna structures formed by patterned metal coating in specific regions, and adhesion promotion structures in other regions. This segmentation allows different portions of the frame to serve distinct purposes - some areas support antenna functionality while others provide adhesive bonding, thereby resolving the conflict between antenna performance and structural requirements in compact devices
Solution Approach 2:
Different regions of the display frame are given different local properties through selective metal coating patterns. The frame has areas with metal coating that provides adhesion promotion and areas that form antenna structures. This local differentiation allows the frame to simultaneously provide structural support, adhesive bonding, and antenna functionality without mutual interference, addressing the contradiction between device compactness and antenna performance
2Strength
If adhesive is used to attach the display cover layer to the display frame, then adhesion is achieved, but antenna performance may deteriorate due to interference from the adhesive layer
Solution Approach 1:
The display frame surface is segmented into distinct functional zones: adhesion promotion structures where metal coating enhances adhesive bonding, and antenna structures where the metal coating forms radio-frequency signal pathways. This spatial segmentation ensures that adhesive is applied only in regions dedicated to bonding, preventing adhesive interference with antenna performance while maintaining strong adhesion where needed
Solution Approach 2:
The patterned metal coating layer acts as an intermediary between the plastic display frame and the adhesive. In adhesion promotion regions, the metal coating provides a surface that enhances adhesive bonding strength. This intermediary structure allows the adhesive to achieve strong bonding without needing to cover the entire frame surface, thereby preserving antenna functionality in other regions
3Device complexity
If the display frame serves only as a structural support, then manufacturing simplicity is maintained, but additional components are needed for adhesion and antenna functions
Solution Approach 1:
The display frame is merged with multiple functional elements: it serves as the structural support, contains patterned metal coating that provides both adhesion promotion and antenna structures, and integrates these functions into a single component. This merging eliminates the need for separate adhesion layers and antenna components, reducing overall device complexity while maintaining manufacturability through a unified structure
Solution Approach 2:
The display frame is designed as a multi-functional component that simultaneously provides structural support, adhesion promotion through patterned metal coating, and antenna functionality. This universal design allows a single component to fulfill multiple roles that would traditionally require separate parts, thereby reducing device complexity without significantly complicating the manufacturing process
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
The solution enhances adhesion between the display cover layer and the frame while enabling effective transmission and reception of radio-frequency signals, addressing the performance issues caused by conductive structures and device compactness.
Implementation Method 1
The patterned metal coating layer may have portions that form adhesion promotion structures for promoting adhesion between the frame and the adhesive
Implementation Method 2
The antenna structures may be used to transmit and receive radio-frequency signals
Data Source
AI summary
An electronic device has a display mounted in a housing using a plastic display frame. The display has an active area and an inactive area. A display cover layer may have polymer coating layers in the inactive area. The display frame may lie under the inactive area. A patterned metal coating layer may be formed on the display frame. The patterned metal coating layer may have portions that form adhesion promotion structures for promoting adhesion between the frame and the adhesive. The patterned metal coating layer may also have portions that form antenna structures. The antenna structures may be used to transmit and receive radio-frequency signals and may be used as adhesion promotion structures. Adhesive may be interposed between the polymer coating layers and the metal coating layer on the display frame to attach the display cover layer and the display to the display frame.