Touch Screen Device Elastic Body Vibration Noise Isolation
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Solution Overview
Problem
Touch screen devices with vibration feedback mechanisms often generate noise due to the exterior case coming into contact with the vibrating touch panel, especially when the peripheral edge of the opening is pressed, which affects aesthetic appeal and foreign substance entry.
Innovation Solution
A touch screen device design featuring a rectangular opening with a second space between the exterior case and the touch panel, and an elastic body on the back surface with a narrower third space, which prevents direct contact between the exterior case and the touch panel during input operations by displacing the touch panel backward when pressed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a space is secured between the peripheral edge of the opening and the panel surface to prevent vibration noise, then vibration noise is reduced, but the aesthetic appearance is impaired and foreign substances can enter
Solution Approach 1:
An elastic body is introduced as an intermediary component between the exterior case and the touch panel. This elastic body fills the gap space, preventing foreign substance entry while maintaining the noise isolation function. The elastic body deforms elastically to accommodate vibrations without transmitting them to the exterior case, thus preserving aesthetic appearance while preventing vibration noise.
2Object-affected harmful factors
If the dimensional accuracy and assembly accuracy of related components are controlled with high precision to prevent vibration noise, then vibration noise is reduced, but manufacturing complexity and cost increase
Solution Approach 1:
The invention changes the parameter of the gap space by introducing an elastic body that can deform. Instead of requiring precise dimensional control to maintain a fixed small gap, the elastic body adapts its shape and position dynamically. This transforms the rigid dimensional accuracy requirement into a more flexible elastic deformation parameter, reducing manufacturing and assembly precision requirements while maintaining noise prevention.
3Area of stationary object
If the opening size increases to accommodate larger display panels or operation buttons, then device functionality is improved, but the peripheral edge becomes easily bendable and contacts the vibrating touch panel causing noise
Solution Approach 1:
The elastic body serves as a pre-positioned cushioning element between the exterior case and the touch panel. It is installed beforehand to prevent direct contact and potential noise generation. When the peripheral edge bends due to the larger opening size, the elastic body absorbs the deformation energy and maintains separation, preventing vibration noise before it can occur 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
Prevents vibration noise from the exterior case while maintaining tactile feedback functionality, allowing for precise control of the touch panel's vibration without compromising the device's appearance or increasing size.
Implementation Method 1
an elastic body facing the panel surface of the touch panel with a third space narrower than the second space therebetween is provided on the back surface of the exterior case. When the peripheral edge of the opening is pressed backward and bent, the elastic body is pressed against the panel surface of the touch panel and presses the touch panel into the first space
Implementation Method 2
a vibrating element such as a piezoelectric actuator is activated and vibrates the touch panel in a direction perpendicular to the panel surface
Data Source
AI summary
In a touch screen device, a second space is secured between a peripheral edge of an opening of an exterior case and a panel surface of a touch panel; an elastic body is provided on the back surface of an easily deformable portion extending along the peripheral edge of the opening; and a third space that is narrower than the second space is secured between the elastic body and the panel surface of the touch panel. When the easily deformable portion is pressed and bent by the input operation, the elastic body is brought into contact with the panel surface and displaces the touch panel backward so that the vibrating touch panel does not come into direct contact with the peripheral edge of the opening.