Touchscreen–Display Gap Structure for High-Frequency Noise Reduction
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Solution Overview
Problem
Existing display technologies face issues with high-frequency noise and heat generation due to friction between the touch screen and display screen, which degrade user experience.
Innovation Solution
A display apparatus with a fixing structure having a Young's modulus less than 0.1 MPa maintains a gap between the touch screen and display screen, using a colloid material and a liquid optical clear adhesive to minimize vibration suppression and noise, while incorporating a sound absorbing sponge to absorb vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the touch screen is directly attached to the display screen, then structural stability is improved, but high-frequency noise and heat generation occur due to friction during vibration
Solution Approach 1:
A fixing structure with low Young's modulus (less than 0.1 MPa) is introduced as an intermediary between the touch screen and display screen. This fixing structure maintains a gap of not less than the standing wave amplitude, preventing direct contact and friction between the touch screen and display screen, thereby eliminating high-frequency noise and heat generation while still providing structural support.
Solution Approach 2:
The fixing structure is designed in advance to maintain a predetermined gap between the touch screen and display screen. This gap is set to be not less than the amplitude of the standing wave generated during tactile sensor operation, providing beforehand cushioning that prevents the touch screen from contacting the display screen during vibration, thus avoiding friction-induced noise and heat.
2Stability of the object's composition
If a rigid fixing structure is used to maintain the gap, then structural stability is improved, but vibration suppression occurs affecting tactile sensation
Solution Approach 1:
The Young's modulus of the fixing structure is changed to be less than 0.1 MPa, which is significantly lower than traditional rigid materials. This parameter change allows the fixing structure to maintain the gap stably while having minimal impact on the vibration characteristics of the touch screen, preserving the quality of tactile sensation during operation.
3Length of moving object
If the gap between touch screen and display screen is reduced, then device thickness is reduced, but friction and noise increase during operation
Solution Approach 1:
The fixing structure serves as a mediator that enables a small gap to be maintained between the touch screen and display screen. By preventing direct contact through this intermediate structure, the patent achieves both thin device profile and elimination of friction-induced noise during operation.
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 effectively reduces high-frequency noise and heat energy, enhancing user experience by maintaining tactile sensation without interfering with display functionality.
Implementation Method 1
a tactile sensor configured to generate a standing wave on a surface of the touch screen when working
Implementation Method 2
a sound absorbing sponge located between the fixing structure and the display screen
Data Source
AI summary
The present disclosure provides a display device. In order to avoid high-frequency noise in a display screen that is caused by friction when a display screen vibrates, a touch screen is not directly attached to the display screen, the display screen and the touch screen instead being fixed together by means of a fixing structure such that a certain gap remains between the display screen and the touch screen, wherein air or another flowing liquid which does not affect display can be filled in the gap. Moreover, the Young's modulus of the fixing structure is less than 0.1 MPa, so as to ensure that the fixing structure does not substantially inhibit the vibration of the touch screen during operation of a touch sensor.