Display Panel Vibration Layout for Forward Sound and PCB Protection
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Solution Overview
Problem
Display apparatuses suffer from degraded sound quality due to sound interference from walls and floors, leading to reduced immersion experience for viewers, and are prone to friction noise and damage from vibrations affecting the driving circuit.
Innovation Solution
A display apparatus design that includes a display panel, a driving circuit part, a first cover, a coupling member between the cover and the printed circuit board, and a vibration apparatus to direct sound forward, minimizing interference and friction noise while protecting the driving circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sound is output from a sound device in general display apparatuses, then sound can be heard, but sound quality is degraded due to interference between sounds reflected from walls and the ground
Solution Approach 1:
The patent extracts the sound output function from the traditional speaker-based sound device and relocates it to the display panel itself, which vibrates to generate sound waves directly toward the front surface. This extraction removes the sound output mechanism from the rear surface, eliminating the source of reflected sound interference from walls and floors.
Solution Approach 2:
The display panel acts as an intermediary between the driving circuit and the external environment for sound output. Instead of using a separate speaker, the display panel itself serves as the sound-generating medium, converting electrical signals directly into sound waves that propagate forward, thereby avoiding reflections from surrounding surfaces.
2Reliability
If a vibration apparatus is disposed at the rear surface of the display device, then sound can be generated, but friction noise occurs due to vibration of the vibration apparatus
Solution Approach 1:
The patent extracts the vibration-generating components (vibration apparatus and coupling members) from the rear surface assembly and relocates the sound generation function to the display panel. This eliminates the mechanical contact and friction between vibration apparatus components that generate unwanted noise.
Solution Approach 2:
The patent replaces the mechanical vibration apparatus system with a direct electro-acoustic conversion system where the display panel responds to driving signals to generate sound. This substitution eliminates the mechanical linkages and friction-based vibration transmission that cause noise.
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 immersion experience by directing sound forward, reducing friction noise, and preventing damage to the driving circuit, thereby improving the reliability and performance of the display apparatus.
Implementation Method 1
a vibration apparatus disposed at the rear surface of the display device and configured to vibrate the display device
Data Source
AI summary
A display apparatus includes a display device including a display panel configured to display an image and a driving circuit part including a printed circuit board connected to the display panel, a first cover disposed at a rear surface of the display device, a first coupling member disposed between the first cover and the printed circuit board, and a vibration apparatus disposed at the rear surface of the display device and configured to vibrate the display device. The printed circuit board is disposed at one periphery of a rear surface of the first cover.