S-Shaped Antenna Layout for Electronic Pen Mainboard Interference

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Solution Overview

Problem

Existing electronic pen designs face challenges in optimizing antenna layout for efficient radio frequency signal transmission and reception while maintaining a compact and portable form factor, often experiencing interference and reduced efficiency due to the integration of multiple components on the mainboard.

Innovation Solution

The electronic pen mainboard incorporates an S-shaped antenna with a radiating part, ground part, and transceiving part, where the ground line is perpendicular to the radio frequency signal feeder line, allowing for reduced interference and increased bandwidth, along with a clearance region to avoid component interference, and an adjustable antenna size for flexible application scenarios.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If multiple components are integrated on the mainboard to maintain compact form factor, then portability is improved, but radio frequency signal transmission efficiency deteriorates due to interference

Engineering Contradiction:

Improveelectronic pen form factorVSAvoidradio frequency signal transmission efficiency

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The mainboard surface is segmented into a clearance region for the antenna and a tracing region for other components. This spatial segmentation isolates the radio frequency components from potential sources of interference, allowing compact integration while maintaining signal transmission efficiency through dedicated interference-free zones.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The antenna is extracted and placed in a dedicated clearance region separate from the mainboard ground and other components. This extraction eliminates interference from adjacent components, resolving the contradiction between compact integration and reliable radio frequency transmission.

Inventive Principle:

Principle #2Taking out (Extraction)

2Area of stationary object

If ground line and radio frequency signal feeder line are arranged closely to save space, then device compactness is improved, but signal interference increases

Engineering Contradiction:

Improvemainboard area utilizationVSAvoidsignal interference

Core Design Contradiction:

Area of stationary objectVSObject-generated harmful factors

Solution Approach 1:

The ground line and radio frequency signal feeder line are arranged perpendicular to each other rather than parallel or overlapping. This asymmetric orthogonal arrangement minimizes electromagnetic coupling and interference between the lines while maintaining efficient space utilization on the mainboard.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

Instead of arranging lines in the same dimensional plane where interference occurs, the ground line and signal feeder line are positioned in orthogonal directions, effectively utilizing the third dimension of spatial arrangement to reduce electromagnetic interference while maintaining compact footprint.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If antenna size is increased to improve radio communication capabilities, then transmission efficiency is improved, but device portability deteriorates

Engineering Contradiction:

Improveradio communication capabilitiesVSAvoidelectronic pen size

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The antenna radiating part is designed in an S-shape configuration rather than a straight line. This curved geometry allows the antenna to achieve the necessary electrical length for effective radio communication while fitting within a compact physical space, thus maintaining both communication capability and portability.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The S-shaped antenna is nested within the clearance region of the mainboard, efficiently utilizing the available space. The curved path of the antenna allows it to pack more electrical length into a smaller physical footprint, achieving good radio communication capabilities without increasing the overall device volume.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS11402929B2Electronic pen mainboard and electronic pen

Publication Date: 2022.08.02 BOE TECHNOLOGY GROUP CO LTD

AI summary

The disclosure provides an electronic pen mainboard and an electronic pen. The electronic pen mainboard includes a mainboard ground, a ground line, a radio frequency signal feeder line, an antenna and a radio frequency chip. The antenna includes a radiating part distributed in an S shape; a ground part connected with the radiating part and connected with the mainboard ground through the ground line; and a transceiving part connected with the radiating part and connected with the radio frequency chip through the radio frequency signal feeder line. On a plane where the mainboard ground is located, the ground line is perpendicular to the radio frequency signal feeder line. The radio frequency chip is responsible for radio communication to realize remote wireless connection and control of each function; and the antenna is responsible for transmitting and receiving a radio signal.