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Headphone Jack Volume Control

IP.com Disclosure Number: IPCOM000236424D
Publication Date: 2014-Apr-24
Document File: 2 page(s) / 44K

Publishing Venue

The IP.com Prior Art Database


Disclosed is a modification to a headphone jack design that provides a convenient all-in-one volume control-headphone jack, which then allows smaller and simpler interface panels.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 63% of the total text.

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Headphone Jack Volume Control

Audio players (portable media players, computers, stereos, etc.) use static buttons, rotary knobs, or touch screens to adjust the audio volume. All of these take up valuable real estate on the device itself. In addition, these controls can have drawbacks such as inadvertent volume adjustment due to unintentional motion of the user (e.g., while the user is jogging, the headphone wires may move back and forth considerably resulting in inadvertent rotation of the headphone jack).

This disclosure teaches that a headphone jack can be modified to enable a convenient all-in-one volume control-headphone jack. This allows smaller and simpler interface panels. Another aspect of the novel design addresses unintentional volume control.

Several methods can be easily adapted to enable this design.

The design adds a simple sensor on the female portion of the plug. The plug is then required to have thin strips of a material that have electrical characteristics different from the base plug material. The sensors can detect when the strips are passing; as long as the strips are not equally distributed, the direction of rotation could be determined. This can also be accomplished using optical sensors

Figure 1: Strips of material added to the plug

A rotary encoder method (similar to that used in older non-optical computer mice) is incorporated into the design. The addition of two new ground strips on the jack (Figure 2, red/blue patterns) and respective...