Headphone Device LVDS Signal Conversion and Earphone Charging
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Solution Overview
Problem
Existing headphone devices with wireless earphones lack efficient methods for data and power transmission between the earphones and the headphones, leading to limitations in audio output and battery charging.
Innovation Solution
A headphone device comprising a headband with two headphone units, each connected to the headband and electrically connected to an earphone unit, which includes an LVDS conversion circuit, a DAC, and a speaker for audio output, as well as a cradle unit for coupling with the earphone unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless communication is used between earphones and headphones, then portability and ease of operation are improved, but data transmission efficiency and power transfer capability deteriorate
Solution Approach 1:
The interface is designed to perform multiple functions: it serves as both a wireless communication interface and a wired connection interface for data transmission and power transfer. When the earphone unit is placed in the headphone device, the interface automatically switches to wired mode, enabling high-speed data transmission and power charging without requiring separate connections.
2Weight of moving object
If wireless communication is used between earphones and headphones, then portability is improved, but power transfer capability deteriorates
Solution Approach 1:
The interface structure enables dual functionality: wireless operation for portability and wired power transfer for charging. The headphone device includes a battery that can charge the earphone unit when connected via the interface, providing power transfer capability without requiring the earphone unit to have a large built-in battery.
Solution Approach 2:
The earphone unit automatically charges itself when placed in the headphone device. The interface detects the connection and automatically initiates power transfer from the headphone device's battery to the earphone unit's battery, eliminating the need for external charging equipment.
3Manufacturing precision
If LVDS signal conversion is implemented in the headphone device, then audio output quality is improved, but device complexity increases
Solution Approach 1:
The headphone device acts as an intermediary between the earphone unit and the audio output system. The LVDS conversion circuit in the headphone device receives the LVDS signal from the earphone unit, converts it to a format suitable for the speaker, and outputs high-quality audio. This distributes the complexity to where it is most needed rather than concentrating it in one component.
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 efficient data transmission and audio output by converting LVDS signals into audio data, and allows for battery charging of the earphone unit using the headphone device's battery, enhancing user experience with improved sound quality and convenience.
Implementation Method 1
a low voltage differential signaling (LVDS) conversion circuit configured to: receive, via the interface, an LVDS signal based on first data received from the earphone unit, and convert the received LVDS signal into the first data
Implementation Method 2
a digital-to-analog converter (DAC) configured to convert audio data included in the first data into an analog signal
Implementation Method 3
a speaker configured to output sound based on the analog signal
Implementation Method 4
an antenna; and an antenna contact connected to an end of the antenna, where the antenna of the earphone unit cover part is configured to electrically connect, via the antenna contact, to an external contact at an end of a second antenna included in the earphone unit
Data Source
AI summary
A headphone device includes: a headband; a first headphone unit connected to an end of the headband; a second headphone unit connected to a second end of the headband and electrically connected to the first headphone unit through the headband, where the first headphone unit and the second headphone unit include, respectively: an interface configured to connect to a second interface of an earphone unit capable of wireless communication with a user terminal; a low voltage differential signaling (LVDS) conversion circuit configured to: receive, via the interface, an LVDS signal based on original data corresponding to data received by the earphone unit from the user terminal and data obtained by the earphone unit, and convert the received LVDS signal into the original data; a digital-to-analog converter (DAC) configured to convert audio data included in the original data into an analog signal; and a speaker configured to output sound.