Vibrating Element Nesting in Cover Panel for Haptic Feedback
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Solution Overview
Problem
Existing display devices face challenges in effectively transferring vibrations to the user without increasing thickness or complexity, particularly in integrating vibrating elements with display panels while maintaining image quality and reducing noise.
Innovation Solution
Incorporating a vibrating element directly under the display panel within a cover panel sheet or in a trench formed in the cover panel sheet, and operating it differently for various periods to generate distinct haptic feedbacks, allowing for reduced thickness and efficient vibration transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a vibrating element is integrated under the display panel, then haptic feedback capability is improved, but device thickness increases
Solution Approach 1:
The vibrating element is nested within the cover panel sheet structure, specifically utilizing a recessed region or groove formed in the cover panel sheet. This allows the vibrating element to be housed within the existing device profile without adding external thickness, while still providing effective haptic feedback through the display panel.
Solution Approach 2:
Instead of adding thickness in the vertical dimension, the design utilizes the lateral dimension by creating a recessed region or groove in the cover panel sheet. This allows the vibrating element to be positioned within the plane of the cover panel rather than extending beyond it, maintaining a sleek profile.
2Adaptability or versatility
If multiple vibrating elements are used for multi-touch haptic feedback, then haptic feedback quality is improved, but device complexity and fabrication cost increase
Solution Approach 1:
A single vibrating element is designed to perform multiple functions by being selectively activated for different touch scenarios. The element can provide haptic feedback for single-touch operations, multi-touch operations, and various interaction types, replacing what would traditionally require multiple separate vibrating elements. This is achieved through control circuitry that selectively drives the single element based on touch detection results.
3Productivity
If the vibrating element is disposed directly under the display panel, then vibration transfer efficiency is improved, but image quality may deteriorate due to noise
Solution Approach 1:
The cover panel sheet serves as an intermediary structure between the vibrating element and the display panel. The vibrating element is positioned within a recessed region of the cover panel sheet, which acts as a mediator to transfer vibrations effectively to the display panel while maintaining a distance that prevents direct contact between the vibrating element and the display panel, thereby avoiding image quality degradation.
4Manufacturing precision
If the cover panel sheet structure is modified to accommodate the vibrating element, then manufacturing precision is improved, but fabrication complexity increases
Solution Approach 1:
The cover panel sheet is segmented or divided into different regions, including a recessed region or groove specifically designed to accommodate the vibrating element. This segmentation allows for precise positioning of the vibrating element within the cover panel sheet structure, ensuring accurate alignment and effective vibration transfer while maintaining manufacturability through standardized molding or fabrication processes.
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
This approach enables effective vibration transfer to the user without adding thickness, supports multi-touch haptic feedback, and reduces the number of vibrating elements required, thereby lowering fabrication costs and maintaining image quality.
Implementation Method 1
A vibrating element is a device that converts electrical energy into mechanical vibration by utilizing electromagnetic force
Implementation Method 2
Such a vibrating element may employ a piezoelectric haptic actuator using a piezoelectric element as a driving source. To do so, the converse piezoelectric effect, in which displacement occurs when a voltage is applied to the piezoelectric element, is utilized
Data Source
AI summary
A display device may include a display panel, a touch member disposed on the display panel and configured to sense a touch signal, a cover panel sheet disposed under the display panel and having an opening via which at least a part of the display panel is exposed, a first vibrating element disposed in the opening, a touch drive chip electrically connected to the touch member and configured to detect touch coordinates in response to the touch signal, a processor electrically connected to the touch drive chip and configured to receive the touch coordinates to generate a pattern signal corresponding to the touch coordinates, and a haptic drive chip electrically connected to the processor and configured to receive the pattern signal to control the first vibrating element. The first vibrating element may be operated differently for different periods of time.