Fine-Hole Display Sound Conduits for Audio Localization
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Solution Overview
Problem
High-image-quality video presentation devices like LED displays lack sound-transmitting properties, making it difficult to localize sound images on the video, and methods using projectors in bright environments can degrade image quality.
Innovation Solution
An audiovisual presentation device with a display unit having light-emitting elements and fine holes, connected to a speaker unit via sound conduits, and optionally including micro speakers and opening/closing mechanisms to control sound output based on video sound sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sound-transmitting screen is used with speakers arranged on the back side of the screen, then sound image localization on video is achieved, but the image quality deteriorates in bright environments such as outdoors
Solution Approach 1:
The screen is segmented into multiple regions with different functions: a first region for video display and a second region for sound transmission. This allows the screen to simultaneously maintain high image quality for video display while providing effective sound transmission paths for audio output, resolving the contradiction between image quality and sound localization.
Solution Approach 2:
A sound transmission region acts as an intermediary between the speakers and the viewer, allowing sound to pass through a dedicated portion of the screen without affecting the overall image display quality. This intermediary region enables sound localization while minimizing impact on visual performance.
2Measurement precision
If a projector is used to display video on a sound-transmitting screen, then sound image localization is achieved, but the installation environment is restricted and image quality deteriorates in bright environments
Solution Approach 1:
The display device is designed with multi-functionality, integrating both video display and sound transmission capabilities in a single unit. The screen can function as both a video display surface and a sound transmission medium, eliminating the need for separate projectors and sound systems, thereby increasing adaptability to various installation environments including bright outdoor settings.
Solution Approach 2:
The device employs dynamic control of the sound transmission region, which can be adjusted or activated as needed. This dynamic capability allows the system to adapt to different environmental conditions and installation scenarios, enhancing versatility while maintaining sound localization functionality.
3Ease of operation
If holes are distributed at uniform density on the display panel to transmit sound, then sound transmission is achieved, but the image quality and visual appearance are compromised
Solution Approach 1:
The screen is divided into a first region for video display and a second region for sound transmission. By concentrating sound transmission functions in a dedicated second region rather than distributing holes uniformly across the entire panel, the design maintains high visual quality and manufacturing precision in the video display region while achieving effective sound transmission in the designated area.
Solution Approach 2:
Different regions of the screen are assigned different qualities and functions: the first region is optimized for video display with high manufacturing precision and visual appearance, while the second region is optimized for sound transmission. This local differentiation allows each region to excel at its specific function without compromising the other.
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
Enables sound image localization on high-image-quality screens without degrading image quality, allowing for high sound pressure, low-frequency reproduction, and improved sound localization control.
Implementation Method 1
a plurality of sound conduits connecting the air chamber and the plurality of fine holes
Data Source
AI summary
An audiovisual presentation device and a signal processing device that enable a sound image to be localized on a video displayed on a higher-image-quality screen. A plurality of fine holes provided in a substrate of a display unit in which light-emitting elements for displaying a video are arranged in an array on the substrate, and an air chamber of a speaker unit from which sound is output according to an audio signal are connected by a plurality of sound conduits. Further, the audiovisual presentation device includes a plurality of opening/closing mechanisms for individually opening/closing the plurality of sound conduits, and a plurality of micro speakers arranged in an array on the substrate of the display unit to output a higher-frequency sound than speakers of the speaker unit.