Projector Sound Screen With Distributed Vibration Audio
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Solution Overview
Problem
Existing projector screens suffer from sound reflection and degradation, image vibrations, and sound imbalance due to space constraints and speaker placement issues in home theaters, leading to degraded image and sound quality.
Innovation Solution
A sound screen for projectors that functions as speakers, with increased surface roughness and a sound absorption structure, incorporating excitation devices and vibrators to distribute sound radially and minimize vibrations, enhancing image and sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a directional speaker is disposed behind the screen to output center sound, then the sound can be transmitted to the front of the screen, but sound reflection and ringing occur degrading the sound effect
Solution Approach 1:
The patent extracts the speaker function from a separate directional speaker and integrates it into the screen itself. The screen is divided into multiple vibration units with excitation devices that directly generate sound waves, eliminating the need for sound to pass through the screen from behind and thus preventing sound reflection and ringing phenomena.
Solution Approach 2:
The patent merges the screen and speaker functions into a single integrated structure. The screen body itself becomes the sound output device through vibration units embedded within it, combining visual projection and audio output in one component to eliminate sound transmission issues.
2Ease of operation
If the screen is cut (perforated) to transmit sound smoothly, then sound transmission is improved, but image loss occurs at the cut portions
Solution Approach 1:
The patent combines the screen and speaker functions into one integrated structure where the screen body itself vibrates to produce sound. This eliminates the need for separate sound transmission paths through cuts or perforations, thereby preventing image loss while maintaining sound transmission quality.
Solution Approach 2:
The screen is designed to perform multiple functions simultaneously: visual projection and sound output. The vibration units embedded in the screen enable it to function as both a display surface and a sound source, eliminating the need for separate speakers or sound transmission openings.
3Ease of operation
If sound is directed in a certain direction through cut portions, then sound transmission is achieved, but sound balance is degraded for audience members outside the propagation angle
Solution Approach 1:
The patent divides the screen into multiple independent vibration units distributed across its surface. Each unit can vibrate independently to produce sound waves that radiate in different directions, creating omnidirectional sound coverage and eliminating sound balance issues for audience members at various positions.
Solution Approach 2:
The patent transitions from directional sound transmission through cut portions to omnidirectional sound radiation through distributed vibration units. By embedding excitation devices throughout the screen body, sound waves are generated in three-dimensional space radiating in all directions rather than being confined to a specific propagation angle.
4Area of stationary object
If the center speaker is disposed under the projector screen in home theaters, then space constraints are addressed, but sound effect is degraded due to height difference
Solution Approach 1:
The patent merges the screen and speaker functions into a single integrated structure where the screen body itself vibrates to produce sound. This eliminates the need for separate speakers positioned at different heights, thereby maintaining proper sound spatial relationships while addressing space constraints in home theater installations.
5Manufacturing precision
If surface roughness is increased to achieve wide viewing angle and high brightness, then image quality is improved, but vibrations and resonance in the enclosure increase
Solution Approach 1:
The patent converts the harmful vibrations and resonance caused by increased surface roughness into beneficial sound waves. The vibration units with excitation devices intentionally generate controlled vibrations that radiate sound, transforming what would be unwanted resonance into useful audio output.
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 sound screen provides improved sound distribution and quality, optimizing space utilization by eliminating the need for separate speakers and reducing vibrations, while increasing viewing angle and brightness characteristics.
Implementation Method 1
a reflective layer which is formed on a surface of the base layer and reflects an image incident on the surface
Implementation Method 2
an excitation device which is formed on a rear surface of the back plate and vibrates the back plate
Implementation Method 3
a sound absorption structure and the like are applied to reduce a ringing phenomenon such as vibrations or resonance in an enclosure due to vibrations of the screen
Data Source
AI summary
The present invention relates to a sound screen for a projector, comprising: a screen plate modified to increase a surface roughness of a front side; a back plate formed on a rear side of the screen plate; and an excitation device formed on the rear side of the back plate to vibrate the back plate.