Display Panel Vibration Layer for Thin Sound and Touch Integration
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Solution Overview
Problem
Existing display devices face challenges in reducing the thickness and size of sound generators while integrating sound output capabilities effectively.
Innovation Solution
Incorporating sound units into the display panel, including a display layer with light-emitting elements and a sensor electrode layer comprising first and second sound electrodes, a vibration layer, and sensor electrodes that sense input, allowing sound output by vibrating the vibration layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sound generators are integrated into the display panel, then sound output capability is achieved, but the thickness and size of the display device increases
Solution Approach 1:
The sound generator is merged with the display panel by integrating the vibration layer, sound electrodes, and connection electrodes directly into the display panel structure. The vibration layer is disposed on the connection electrodes, forming a unified integrated structure that eliminates the need for separate sound generator components, thereby achieving sound output without significantly increasing device thickness.
Solution Approach 2:
The sound electrodes and vibration layer are arranged in a planar configuration within the display panel's existing thickness profile. By utilizing the surface area of the display panel and arranging components in two dimensions rather than adding significant third-dimensional thickness, the sound generation functionality is achieved while maintaining a thin overall device profile.
2Adaptability or versatility
If sound units are integrated into the display panel, then sound generation is achieved, but the complexity of the display panel structure increases
Solution Approach 1:
The vibration layer serves multiple functions: it acts as a structural support layer, an acoustic vibration element for sound generation, and a mounting substrate for the sound electrodes. The connection electrodes simultaneously provide electrical connectivity for both display and sound functions. This multi-functionality reduces the need for additional dedicated components, thereby managing structural complexity while achieving sound generation.
3Length of stationary object
If the vibration layer is made thinner to reduce device thickness, then device compactness is improved, but the sound output efficiency decreases
Solution Approach 1:
The vibration layer is constructed from piezoelectric material that exhibits strong piezoelectric coefficients, enabling efficient conversion of electrical energy to mechanical vibration even at thin dimensions. The sound electrodes are configured with optimized patterns and materials that enhance coupling efficiency with the vibration layer, compensating for the reduced thickness and maintaining sound output efficiency in a compact form factor.
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
Enables thinner and more compact display devices with integrated sound output capabilities, enhancing user interaction through touch sensing and sound generation.
Implementation Method 1
a vibration layer electrically contacting the first sound electrode and the second sound electrode, wherein the vibration layer may be deformed in response to a first sound driving voltage applied to the first sound electrode and a second sound driving voltage applied to the second sound electrode
Implementation Method 2
sensor electrodes disposed on the vibration layer. The sensor electrodes may sense an input
Data Source
AI summary
A display device includes a display panel including a display layer including light-emitting elements disposed on a substrate, and a sensor electrode layer disposed on the display layer. The sensor electrode layer includes a first sound electrode and a second sound electrode; a vibration layer electrically contacting the first sound electrode and the second sound electrode and being deformed in response to a first sound driving voltage applied to the first sound electrode and a second sound driving voltage applied to the second sound electrode; and sensor electrodes disposed on the vibration layer. The sensor electrodes sense an input.