Supplementary Earpiece for Moving Display Audio Correction
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Solution Overview
Problem
Traditional mobile devices using moving-screen technology for audio reproduction suffer from poor sound quality due to the glass display's inherent limitations, resulting in acoustic peaks and valleys, inadequate low-frequency response, and significant variation in frequency response, which can prevent industry certification.
Innovation Solution
A dual audio transducer system is implemented, where the first transducer uses the display glass and a second dynamic audio transducer, such as an electrodynamic speaker, is placed near the top of the device to supplement sound output and compensate for frequency anomalies, with the second transducer being equalized to meet required frequency response standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If moving-screen technology is used for audio reproduction, then device size and weight are reduced, but sound quality deteriorates due to acoustic peaks and valleys
Solution Approach 1:
The patent combines the glass display acting as a transducer with a separate dynamic speaker near the top of the device. The glass display provides hands-free audio capability while the dynamic speaker supplements sound output and compensates for frequency anomalies, creating a combined audio system that leverages both technologies
Solution Approach 2:
The patent creates a composite audio system where the glass display (visual display material) is used in conjunction with a dynamic speaker (acoustic transducer material). This composite approach allows the glass to serve dual purposes while the dynamic speaker compensates for the glass's acoustic limitations
2Device complexity
If moving-screen technology is used for audio reproduction, then device complexity is reduced, but frequency response uniformity deteriorates with substantial variation from screen to screen
Solution Approach 1:
The patent measures the frequency response of each glass display and uses this measurement to equalize the dynamic speaker's output. This feedback approach compensates for variations in glass acoustic properties, ensuring consistent frequency response across different devices while maintaining a relatively simple system architecture
3Adaptability or versatility
If moving-screen technology is used for audio reproduction, then low-frequency audio capability is improved, but acoustic quality deteriorates due to poor low-frequency reproduction
Solution Approach 1:
The patent places a dynamic speaker specifically near the top of the device to supplement sound output and compensate for frequency anomalies in specific regions. This localized approach allows the glass display to provide hands-free capability while the dynamic speaker addresses specific acoustic deficiencies in its vicinity
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 dual transducer system enhances user experience by providing improved frequency response and meeting industry standards, ensuring adequate sound quality and certification by combining the responses to achieve a smooth, notch-free audio output.
Implementation Method 1
the glass display acts as a transducer for an audio signal
Implementation Method 2
the use of the device display glass itself as a speaker membrane or surface
Implementation Method 3
a second dynamic audio transducer, such as an electrodynamic speaker
Data Source
AI summary
A method and system for providing a moving-screen sound system for a portable communication device such as a cell phone employs a fixed, pivoted, or hinged display screen driven directly or indirectly by an audio actuator. While the frequency response of the screen may have defects that would negatively impact overall sound quality from the device, in embodiments a supplemental audio transducer is placed adjacent the screen or elsewhere on the device so as to supplement or correct the frequency response of the screen. In an embodiment, the supplemental audio transducer is driven to correct a notch or other defect in the screen response. In another embodiment, the supplemental audio transducer is driven to extend the bass response of the screen.