Double-Faced Display Panel Vibration for Slim Two-Sided Sound
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices with integrated speakers face challenges in sound quality and immersion due to sound waves being directed rearward, causing interference and diffraction, and require additional space for multiple speakers in double-faced display devices.
Innovation Solution
A panel vibration type sound generating actuator that directly vibrates both sides of a double-faced display device using a single bobbin, magnet, and coil assembly, minimizing space and improving sound localization by eliminating the need for separate speakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional speaker is disposed at the rear or lower part of the display panel, then the display device can output sound, but the sound progresses toward the rear side instead of the viewer, causing interference and diffraction that degrade sound quality
Solution Approach 1:
Instead of placing the speaker at the rear or lower part of the display panel where sound would propagate away from the viewer, the invention inverts the approach by integrating the speaker directly into the display panel structure itself. The speaker is positioned within the display panel such that sound waves are generated and directed toward the viewer's side, eliminating the interference and diffraction problems caused by rearward sound propagation.
2Adaptability or versatility
If multiple speakers are arranged in opposite directions for a double-faced display device, then sound can be output from both sides, but the device requires additional space and increased complexity
Solution Approach 1:
The invention applies multi-functionality by designing a single speaker unit that can output sound in opposite directions simultaneously. The speaker is configured with a diaphragm that can vibrate in both directions, allowing one speaker to perform the function of multiple speakers. This enables double-sided sound output for the display device without requiring multiple separate speakers, thereby reducing device complexity and space requirements while maintaining adaptability for different display configurations.
3Ease of manufacture
If a conventional speaker is integrated into the display device, then sound output is achieved, but the device thickness increases due to the need for separate speaker components
Solution Approach 1:
The invention merges the speaker components with the display panel structure itself. The speaker diaphragm is integrated into the display panel, and the magnetic assembly is positioned within the display panel's thickness rather than adding external speaker housings. This combining of functions allows the display device to have integrated sound output capability while maintaining a thin profile, as the speaker components share the same space as the display panel structure.
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
Enhances sound quality and reduces device thickness by directly generating sound on both sides of the display, minimizing interference and diffraction, while maintaining effective sound pressure across opposite directions.
Implementation Method 1
a coil wound around an outside of a portion of the bobbin
Implementation Method 2
vibrate both of the display panels to generate sound
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
The present embodiment relates to a double-faced display device generating sound by directly vibrating display panels and includes: a first display panel (100) and a second display panel (100') disposed at the front and rear surface of the display device, respectively; a single sound generating actuator (500) connected to the first display panel (100) and the second display panel (100') to simultaneously vibrate the first display panel and the second display panel and thus generate sound; and a support part (300, 700) configured to support the sound generating actuator, the first display panel, and the second display panel. The present embodiment does not require a separate speaker and thus can achieve a thin or slim display device, and can improve the localization or quality of sounds output in opposite directions in the double-faced display device.