Display Device Rear Vibration Generators for Sound Output
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Solution Overview
Problem
Display devices for electronic devices, such as smartphones, require a wider design flexibility to accommodate sound output without exposing vibration generators, particularly in call mode, where the vibration generator on the front surface can obstruct the display area.
Innovation Solution
A display device design that incorporates a first vibration generator under the display panel to produce sound by vibrating in the thickness direction and a second vibration generator under a bracket to generate horizontal vibrations, allowing sound output without exposing the vibration generators externally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a vibration generator is disposed on the front surface of the display device to output sound in call mode, then sound output function is provided, but the display area is reduced and design freedom is limited
Solution Approach 1:
The patent moves the vibration generator from the front surface (2D plane) to the rear surface of the display panel, utilizing the thickness direction (Z-axis) for sound output. This dimensional relocation allows the vibration generator to be hidden from the front view, maximizing the display area while maintaining sound output functionality.
Solution Approach 2:
The vibration generator is extracted from the front surface location and repositioned to the rear surface location. This extraction removes the obstructing element from the display area while preserving its essential function of generating vibrations for sound output in call mode.
2Area of stationary object
If a vibration generator is disposed under the display panel to output sound, then the display area is maximized, but horizontal vibration capability is lost
Solution Approach 1:
The vibration generation function is segmented into two independent vibration generators: one for vertical vibration (thickness direction) and another for horizontal vibration. This segmentation allows each generator to be optimized for its specific direction while both contribute to the overall sound output, maintaining full vibration capability from the rear surface position.
Solution Approach 2:
The rear surface position is designed to accommodate multiple vibration generators with different vibration directions (vertical and horizontal). This multi-functional arrangement allows the single location to provide both thickness-direction vibrations for sound output and horizontal vibrations for enhanced audio experience, maximizing both display area and vibration capability.
3Device complexity
If only a single vibration generator is used, then device complexity is reduced, but both vertical and horizontal vibration functions cannot be provided
Solution Approach 1:
The vibration function is segmented into two independent generators: a first vibration generator for vertical vibrations in the thickness direction and a second vibration generator for horizontal vibrations. This segmentation enables both vibration functions to be provided simultaneously while keeping each individual generator simple in design.
Solution Approach 2:
Two vibration generators with different vibration directions are merged into a single integrated sound output system at the rear surface. The first and second vibration generators work together to provide comprehensive sound output with both vertical and horizontal vibration capabilities, achieving functional completeness while maintaining manageable device complexity.
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 design enhances design freedom by enabling wider display areas while maintaining effective sound output, reducing noise generation and improving sound quality through horizontal vibrations, effectively utilizing the vibration generators without compromising the display surface.
Implementation Method 1
a first vibration generator disposed under the display panel, where the first vibration generator outputs sound by vibrating the display panel in a thickness direction of the display panel
Implementation Method 2
a second vibration generator disposed under the bracket, where the second vibration generator outputs horizontal vibrations by vibrating the bracket in a horizontal direction perpendicular to the thickness direction
Data Source
AI summary
A display device includes: a display panel; a bracket disposed under the display panel; a first vibration generator disposed under the display panel, where the first vibration generator outputs sound by vibrating the display panel in a thickness direction of the display panel; and a second vibration generator disposed under the bracket, where the second vibration generator outputs horizontal vibrations by vibrating the bracket in a horizontal direction perpendicular to the thickness direction.