Display Panel Sound Module with Differing Adhesive Moduli
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Solution Overview
Problem
Display apparatuses face challenges in weight-lightening and slimming while maintaining effective sound output, as embedded sound devices are prone to damage from external impacts and often direct sound away from the viewer, hindering immersion.
Innovation Solution
A display apparatus with a sound generating module on its rear surface, featuring a vibration generating device, a circuit board, and adhesive members with differing elastic moduli to direct sound forward and enhance durability against impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a sound device is embedded into the display apparatus to enable sound output, then sound generation capability is improved, but the display apparatus becomes heavier and thicker
Solution Approach 1:
The patent merges the sound generating module with the display panel by bonding the vibration generating device directly to the rear surface of the display panel. This integration eliminates the need for separate sound device housing and mounting structures, thereby enabling sound output while minimizing additional weight and thickness.
Solution Approach 2:
The display panel serves dual functions: displaying images and generating sound through vibration. By making the display panel itself the vibration plate, the apparatus eliminates dedicated sound output components, achieving multi-functionality that reduces overall weight and thickness while maintaining sound generation capability.
2Weight of stationary object
If a piezoelectric member is used as the sound device to reduce weight and thickness, then weight-lightening and slimming are improved, but the sound device becomes vulnerable to damage from external impacts
Solution Approach 1:
The patent introduces a cushioning layer between the vibration generating device and the display panel that can absorb and dissipate impact energy. This pre-positioned cushioning structure protects the fragile piezoelectric member from damage during external impacts while maintaining the lightweight and slim design.
Solution Approach 2:
The patent employs composite material structures in the sound generating module, combining piezoelectric materials with protective and cushioning materials. This composite approach maintains the lightweight characteristics of piezoelectric members while adding impact resistance through strategically placed protective layers and cushioning structures.
3Weight of stationary object
If the sound device is embedded in the rear surface of the display panel, then weight-lightening and slimming are improved, but the sound travels in rearward or sideward direction instead of forward direction, hindering viewer immersion
Solution Approach 1:
The patent utilizes the display panel's large surface area in the forward direction to radiate sound waves. By making the entire display panel surface vibrate, sound is emitted in the forward direction toward the viewer, transforming the sound radiation pattern from traditional rearward/sideward emission to forward-directional emission that enhances viewer immersion.
Solution Approach 2:
The display panel simultaneously functions as both the image display surface and the sound radiation surface. This multi-functionality allows sound to be emitted from the entire front surface of the display apparatus toward the viewer, improving immersion while maintaining the embedded design that achieves weight-lightening and slimming.
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 solution enables sound to be output in a forward direction towards the viewer while improving durability against external impacts, enhancing the audio experience and structural integrity of the display apparatus.
Implementation Method 1
a sound generating module on a rear surface of the display panel, wherein the sound generating module includes a vibration generating device
Implementation Method 2
a first adhesive member between the circuit board and the vibration generating device, and a second adhesive member between the vibration generating device and the display panel, an elastic modulus of the second adhesive member differing from an elastic modulus of the first adhesive member
Data Source
AI summary
A display apparatus includes a display module including a display panel configured to display an image and a sound generating module on a rear surface of the display panel, the sound generating module includes a vibration generating device, a circuit board on a lower surface of the vibration generating device, a first adhesive member between the circuit board and the vibration generating device, and a second adhesive member between the vibration generating device and the display panel, an elastic modulus of the second adhesive member differing from an elastic modulus of the first adhesive member.