Speaker Enclosure Layout for Stable Display Assistants
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Solution Overview
Problem
Electronic devices with microphones and speakers, when designed for small footprints, face issues such as muffled sound due to obstruction and instability due to high center of mass, particularly in smart home environments.
Innovation Solution
A display assistant device with a speaker assembly enclosed in a structure that provides electromagnetic shielding and heat dissipation, featuring a rear speaker and front speakers, and a base design that maintains a low center of mass for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the device is made with a small footprint to accommodate restricted spaces, then the device can be disposed in cluttered areas, but the speaker may be obscured underneath other components causing muffled sound
Solution Approach 1:
The patent positions the speaker at the rear of the device rather than at the front or bottom, utilizing the depth dimension of the device body. This rearward placement allows the speaker to project sound forward through the device's front opening, avoiding obstruction by front-facing components while maintaining a compact footprint. The speaker is integrated into the rear housing structure, effectively using the device's internal volume to resolve the space-sound quality conflict.
2Area of stationary object
If the device is designed to be more vertical to reduce footprint, then the device occupies less horizontal space, but the center of mass increases making the device more prone to falling
Solution Approach 1:
The patent employs a tilted screen configuration where the display is angled relative to the device's vertical axis. This tilting redistributes the device's mass distribution and lowers the effective center of mass in the vertical direction, improving stability. The screen is supported at an angle rather than being perfectly vertical, which shifts weight toward the base and reduces the tendency to tip forward during user interaction.
Solution Approach 2:
The device housing incorporates multiple materials with different densities and mechanical properties. The base structure uses heavier materials to anchor the center of mass lower, while upper portions use lighter materials to reduce overall weight. This composite construction allows the device to maintain a vertical orientation with reduced footprint while compensating for stability through strategic material placement and mass distribution.
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 device offers a low-cost, mechanically robust, voice-activated interface with visual display capabilities, supporting various functions while maintaining stability and sound quality in smart home environments.
Implementation Method 1
The electrically conductive portion of the enclosure structure is configured to provide electromagnetic shielding for the one or more electronic components
Implementation Method 2
The electrically conductive portion of the enclosure structure and the one or more electronic components are thermally coupled to each other via a thermal spreader
Data Source
AI summary
A system, such as a voice assistant device, is disclosed which includes a base that houses at least one speaker and supports a display screen. The base is configured to hold the display screen at an angle relative to a surface, creating a predefined space between the screen's lower edge and the surface. To optimize sound, multiple speakers can be oriented in different directions, with one speaker potentially facing a front grille while another is aimed in another direction behind the display. The system may further integrate a camera and a radar transceiver within the bezel of the display screen.