Projector Stand Acoustic Diffusion for Upward Projection

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Solution Overview

Problem

Projectors with built-in speakers face sound obstruction issues when projecting upwards, as sound emitting ports on the rear surface face downwards, blocking high-frequency sound and reducing the sense of presence.

Innovation Solution

Incorporating an acoustic diffusion unit on the stand or projector surface to reflect and diffuse sound, ensuring high-frequency sound is spread even when the projector is angled upwards.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the projector is directed upward for ceiling projection, then the projection function is improved, but the sound emitting port faces downward and blocks high-frequency sound propagation

Engineering Contradiction:

Improveprojection directionVSAvoidsound blockage

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a sound diffuser as an intermediary component between the sound emitting port and the stand. This diffuser redirects high-frequency sound waves that would otherwise be blocked by the stand, allowing them to propagate upward toward the ceiling projection area. The diffuser acts as a mediator that resolves the conflict between upward projection positioning and sound emission requirements.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent addresses the sound blockage problem by introducing a vertical dimension solution - the sound diffuser is positioned above the sound emitting port to redirect sound waves upward in the vertical dimension, rather than allowing them to travel horizontally where they would be blocked by the stand. This dimensional approach allows sound to bypass the obstruction created by the stand's horizontal positioning.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Device complexity

If the sound emitting port is positioned on the rear surface for compact layout, then the device structure is simplified, but the stand blocks high-frequency sound in certain projection postures

Engineering Contradiction:

Improvespeaker layoutVSAvoidsound diffusion

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The sound diffuser serves as an intermediary element that compensates for the limitations of the compact rear-surface speaker layout. By positioning the diffuser above the rear-mounted sound emitting port, the system maintains the simplified compact structure while adding the necessary sound redirection capability to prevent the stand from blocking high-frequency sound propagation.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 acoustic diffusion unit effectively spreads high-frequency sound, maintaining a clear audio experience and enhancing the sense of presence during video projection.

Implementation Method 1

an acoustic diffusion unit configured to reflect and diffuse sound emitted from the speaker is provided on a surface of the stand facing the projector

Methodology Applied

Scientific EffectSound reflection and diffusion: Reflection

Data Source

PatentUS20250244647A1Projector with stand

Publication Date: 2025.07.31 SEIKO EPSON CORP

AI summary

A projector with stand includes a projector including a projection port, a speaker disposed in the projector, and a stand supporting the projector. An acoustic diffusion unit that reflects and diffuses sound emitted from the speaker is provided on a surface of the stand facing the projector.