Display Panel Connection Frame for Sound Distortion Reduction
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Solution Overview
Problem
Sound-on-display devices experience sound distortion and abnormal sounds due to high stress and strain on rigid display screens, which are fixed to aluminum frames via magnetic attraction, leading to vibration issues and poor linear characteristics.
Innovation Solution
A display device design featuring a connection frame with protrusions to reduce contact area between the display panel and the frame, using a detachable fastener system to prevent abnormal sounds, and incorporating a vibration actuator with a fixation member in a suspended state to enhance frequency response and reduce surface density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the display screen is fixed on the device box via an aluminum frame magnetically, then the display screen can be securely mounted, but the rigid surface of the display screen in contact with the aluminum frame experiences greater stress and strain, resulting in poor sound linear characteristic and great distortion
Solution Approach 1:
The connection frame is divided into a frame-shaped member and a separate connection member that can be detachably coupled. This segmentation allows the display panel to be supported at discrete locations (via protrusions on the frame-shaped member) rather than being in full contact with a rigid frame, reducing stress and strain on the display screen during vibration while maintaining secure mounting.
Solution Approach 2:
The connection frame acts as an intermediary structure between the display panel and the box. Instead of directly fixing the display panel to the box via a rigid aluminum frame, the connection frame with its protrusions provides a suspended support that reduces contact area and minimizes the transmission of stress to the display screen, thereby reducing sound distortion.
2Power
If the vibration amplitude of the screen is relatively large, then the sound output is improved, but the vibration force exceeds the magnetic attraction force, causing the aluminum frame to collide with the device box and produce abnormal sound
Solution Approach 1:
The connection member is designed to be detachably coupled to the box via a fastener, allowing the connection frame to move relatively independently from the box. This dynamic coupling allows the display panel to vibrate with larger amplitudes without the rigid aluminum frame colliding with the box, preventing abnormal sounds while maintaining high sound output power.
3Stability of the object's composition
If the display panel is fully supported by the frame, then the mounting stability is improved, but the contact area increases stress on the panel, leading to poor vibration characteristics
Solution Approach 1:
The support structure is segmented into multiple discrete protrusions on the frame-shaped member instead of a continuous rigid frame. The display panel is fixed on these protrusions, which provides stable mounting while limiting the contact area to specific points, thereby reducing the overall stress and strain on the panel during vibration.
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 design minimizes sound distortion by reducing stress on the display panel, prevents abnormal sounds, and improves frequency response by reducing surface density, resulting in clearer and more efficient sound production.
Implementation Method 1
an actuator needs to be attached onto a back surface of a display screen, and the display screen serves as a diaphragm of a loudspeaker. When the actuator vibrates, the screen vibrates too, so as to push an airflow to make a sound
Implementation Method 2
the display screen is fixed on a device box via an aluminum frame magnetically
Data Source
AI summary
A display device, including a display panel, a box, a connection frame and a vibration actuator provided on the display panel. The connection frame includes: a frame-shaped member including a first end face and a second end face arranged opposite to each other, the first end face being attached to a top face of the box, a plurality of protrusions being provided on the second end face, a surface of each protrusion away from the first end face forming a support face, and the display panel being fixed on the support face; and a connection member fixedly coupled to the frame-shaped member, and detachably coupled to the box via a fastener.