Electrical volume control using contacts on rotatable connector, and method

Electronic equipment control of a parameter of electronic equipment includes contacts on relatively movable connectors to provide control output for the electronic equipment, a connector member connects electrically with a further connector member, and a direction decoder receives inputs from the contacts representing relative motion between the further connector member and the connector member to provide such control output. A method of adjusting a parameter of electronic equipment includes effecting relative movement between connected parts of an electrical connector, and using a number of contacts on the connected parts obtaining a representation of such relative movement adjusting such parameter.

TECHNICAL FIELD

The present invention relates generally, as indicated, to electrical volume control using contacts on a rotatable connector and method, and, additionally, to use of such electrical volume control to control audio volume in a portable electronic device.

BACKGROUND

Mobile and/or wireless electronic devices are becoming increasingly popular. For example, mobile telephones, portable media players and portable gaming devices are now in wide-spread use. In addition, the features and accessories associated with certain types of electronic devices have become increasingly diverse. To name a few examples, many electronic devices have cameras, text messaging capability, Internet browsing capability, electronic mail capability, video playback capability, audio playback capability, image display capability and handsfree headset interfaces. Exemplary accessories may also include headphones, music and video input players, etc.

Many mobile and/or wireless electronic devices include audio connectors and/or other connectors to which accessories, such as, for example, handsfree headsets, headphones, external speakers, and devices associated with the above and other capabilities and functions, etc., may be connected. Audio connectors and other type of connectors for such devices usually include one or more pins, contacts, terminals or terminal portions of respective wires or of printed circuit traces, and the like via which electrical signals and/or power are conducted between a connector of the mobile phone, for example, and the connector of the accessory, for example, or of another device (collectively referred to as accessories below).

One example of a parameter of a portable electronic device, such as a mobile phone, music storage and listening device, etc., is audio volume. To control or adjust volume it is intuitive to turn a knob. However, in such devices and accessories used with them, there is only a limited amount of space to put a mechanical solution for a volume control, such as a knob, push buttons, etc. Also, to use one or more keys that have several functions, one of which is volume control, may undesirably increase the complexity of use and/or construction of such electronic devices.

As electronic devices, especially portable electronic devices, become smaller, there is less space available for operational controls, connectors, and the like. Also, as such electronic devices have increased features, there is less available space for adding further features. There is a need to optimize space usage on such devices.

SUMMARY

According to one aspect of the invention, a control for electronic equipment includes a connector member adapted to connect electrically with a further connector member, and contacts on the connector member in position with respect to the connector member to receive electrical representation of relative motion between a further connector member and the connector member to provide a control output for electronic equipment.

According to another aspect, the relative motion is rotational motion.

According to another aspect, the connector member comprises a housing and at least one electrical terminal exposed with respect to the housing and adapted for electrical connection to a further electrical terminal of a further connector member inserted into the housing.

According to another aspect, the contacts are located generally at an end of the housing near an entrance at which a further connector member may be inserted into the housing interior, wherein the housing interior has a generally linear axis and is configured to permit rotation about such axis of a further connector while in position in the housing interior, the contacts being oriented relative to other rotating contacts associated with a further connector member when it has been inserted into the interior of the housing and is being rotated.

According to another aspect, the connector member comprises an audio connector adapted to connect by electrical conduction with a further connector member that is an audio plug or audio jack inserted into the housing and having a set of contacts for selective short circuiting of contacts of the housing.

According to another aspect, the connector member comprises a female audio connector of an electronic device, and wherein the control output is used to control sound volume of the electronic device.

According to another aspect, electric circuitry is adapted to operate the electronic equipment, and the control output is provided the output circuitry to effect adjustment of a parameter of the electronic equipment.

According to another aspect, the electronic equipment includes operating circuitry including an audio speaker operating capability, and wherein the control output is coupled to the operating circuitry to provide such control output to adjust speaker volume.

According to another aspect, the electronic equipment comprises a mobile phone having a speaker, and wherein the control output is provided operating circuitry of the mobile phone to adjust speaker volume.

According to another aspect, the further connector member is included, the further connector member comprising an electrical terminal adapted to make electrical connection with the connector member, a set of contacts in position relative to the electrical terminal and adapted for movement therewith to provide connection of respective contacts on the connector member.

According to another aspect, the connector member comprises a housing, and wherein the further connector member is at least partly insertable into the housing for the electrical terminal of the further connector member to connect electrically with another electrical terminal in the housing.

According to another aspect, the further connector member comprises a male audio jack and the connector member comprises a female audio receptacle.

According to another aspect, the connector member comprises a housing, the electrical terminal of the further connector member being insertable into the housing and adapted to make electrical connection with an electrical terminal of the connector member in the housing.

According to another aspect, the housing has an interior having a generally linear axis, and the electrical terminal of the further connector member is insertable in the housing generally along the linear axis and is rotatable about the axis to rotate contacts as a representation of relative movement.

According to another aspect, the further connector member includes a housing, the electrical terminal of the further connector member is generally elongate extending from the further connector member housing for insertion into the interior of the connector member housing, contacts of the connector member and further connector member in combination with operating circuitry comprising a logic direction encoder to represent rotational direction.

According to another aspect, the connector member comprises an audio connector adapted to connect by electrical conduction with the further connector member, the further connector member is an audio plug or audio jack inserted into the housing of the connector member, and wherein the control output is provided the operating circuitry to effect adjustment of a parameter of the electronic equipment.

According to another aspect, the operating circuitry includes an audio speaker operating capability, and wherein the control output is coupled to the operating circuitry to adjust speaker volume.

According to another aspect, the electronic equipment comprises a mobile phone having a speaker, the operating circuitry is operating circuitry for the mobile phone, and wherein the control output is provided the operating circuitry of the mobile phone to adjust speaker volume in response to rotating of the further connector member relative to the connector member.

According to another aspect, an electrical connector member, includes an electrical terminal adapted to make electrical connection with another electrical terminal, a plurality of contacts in position relative to the electrical terminal and adapted for movement therewith to provide selective short circuiting and open circuiting of other contacts of such another electrical terminal as a representation of relative movement of the electrical terminal and another electrical terminal.

According to another aspect, an audio plug is adapted to connect with a female audio connector.

According to another aspect, a method of adjusting a parameter of electronic equipment, comprises effecting relative movement between connected parts of an electrical connector, and using a number of contacts to provide electrical representation of such relative movement adjusting such parameter.

Many aspects of the invention can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present invention. To facilitate illustrating and describing some parts of the invention, corresponding portions of the drawings may be exaggerated in size, e.g., made larger in relation to other parts than in an exemplary device actually made according to the invention. Elements and features depicted in one drawing or embodiment of the invention may be combined with elements and features depicted in one or more additional drawings or embodiments.

Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views and may be used to designate like or similar parts in more than one embodiment. Also, primed reference numerals may be used to designate parts that are similar to parts designated by the same unprimed reference numeral.

DESCRIPTION

The interchangeable terms “electronic equipment” and “electronic device” include portable radio communication equipment. The term “portable radio communication equipment,” which hereinafter may be referred to as a “mobile radio terminal,” as “portable electronic equipment,” or as a “portable communication device,” includes all equipment such as mobile telephones, pagers, communicators, electronic organizers, personal digital assistants (PDAs), smartphones, portable communication apparatus, remote controls, and or the like.

In the present application, embodiments of the invention are described primarily in the context of a mobile telephone. However, it will be appreciated that the invention is not intended to be limited to the context of a mobile telephone and may relate to any type of appropriate electronic equipment, examples of which are mentioned above, and also include media players, gaming devices, PDAs and computers, etc.

Referring toFIG. 1, the invention is described with reference to an electronic device1, such as, for example, a portable electronic device, e.g., a mobile phone, music, radio, or video playing device, etc., and an electrical volume control2that uses contacts on relatively rotatable portions of a connector, e.g., an audio connector or audio jack and receptacle. In the interest of brevity the electronic device will be described below with reference to a mobile phone.

In the illustrated embodiment the electrical volume control2includes an electrical direction encoder3that uses two sets of electrical contacts (3m,3finFIGS. 4 and 5) to determine whether volume (audio volume) is to be increased or decreased. Relative motion between the respective sets of electrical contacts provides for an output that may be used by the mobile phone1to adjust or to control audio volume or some other parameter of the mobile phone.

A connector system5, such as, for example, an audio connector system, includes a female receptacle6(sometimes referred to as an audio receptacle, audio plug housing, audio socket or opening, or the like) and a male plug7(sometimes referred to as an audio plug or audio jack). The connector system5may be coupled to operating circuitry8of the mobile phone1to electrically connect the operating circuitry and an accessory9. One example of a connector system5that is used in mobile phones and other portable electronic devices is an audio connector referred to as a 3.5 millimeter connector or as a 2.5 millimeter connector. The invention may be used with these or other types of connector systems.

The audio connector system5may be the same as or similar to a conventional audio connector system except that the electrical direction decoder3of the electrical volume control2is associated with the audio connector system. For example, the electrical direction decoder includes a set of contacts3fon the female receptacle6and another set of contacts3mon the male plug7. The respective sets of contacts3f,3mare on surfaces or other parts of the female receptacle and male plug so that when the male plug has been fully inserted into the hollow interior6iof the female receptacle6, respective contacts of one set are able to engage in electrical connection with one or more respective contacts of the other set.

As is conventional for audio connector systems, the hollow interior6iof the female receptacle is of generally elongate linear shape, e.g., extending along a generally linear axis A, and the electrical terminal portion7iof the male plug also is generally of an elongate linear shape, e.g., extending along a generally linear axis A′, and is of a length and size (form factor) to fit in the hollow interior6iand to engage corresponding terminals of the female receptacle6within the hollow interior. For example, the cross section of the hollow interior6iand cross section of the male plug electrical terminal portion7imay be generally circular so that the hollow interior and the male plug electrical terminal portion are generally of circular cylindrical shape. The hollow interior6iand the male plug electrical terminal portion7imay be of a different shape than just described. However, the hollow interior6iand the male plug electrical terminal portion7ishould be related to permit rotating of the male plug electrical terminal portion while it is within the hollow interior and connecting with electrical terminals of the female receptacle6.

Briefly referring toFIGS. 2-5, exemplary layouts or patterns for the sets of contacts3fand3mare illustrated schematically. The contacts set3fis relatively small in number of contacts, for example, three contacts as shown in the drawings, and the set3ftends a relatively small arc about the axis A of the female receptacle6. The radial dimension of each contact in the set3fis relatively large, as is seen. In contrast to the contacts in the set3f, the contacts in the set3meach tends a relatively large arc about the axis A′, and the contacts of the set3mare arranged in accurately spaced-apart relation fully about the axis A′. The radial dimension of the contacts in the set3mis relatively small compared to the radial dimension of the three contacts in the set3f. Since the contacts3mare on the male plug7those contacts will be referred to for convenience as “male contacts.” Since the contacts3fare on the female receptacle those contacts will be referred to for convenience as “female contacts.” The style of the contacts3mand3f, though, is not necessarily of the male or female contact type, e.g., a male contact member that inserts into another female contact member.

The contacts in the set3mmay be respective electrically conducting areas, pins, wires, traces on a substrate, e.g., on a printed circuit board or on surfaces of the female receptacle and male plug, respectively, etc. The contacts in the set3min a sense are arranged as a ring of conducting areas around the protruding terminal portion of the male plug7.

The contacts in the sets3f,3mare located, respectively, on surfaces10,11aof the female receptacle6and male plug7, which surfaces confront each other when the male plug is in position fully inserted in the female receptacle for normal use in making electrical connections of respective terminals of the female receptacle and male plug. With the male plug in such position, the contacts in the respective sets3f,3mface each other and a number of the contacts engage each other in electrically conductive relation. For example, as is seen looking atFIGS. 3 and 4, one or more of the contacts of the set3melectrically engage one, two or three of the contacts of the set3f. The contacts in the set3mform a ring of respective circumferentially spaced-apart conducting areas; these are located on the male plug7about the axis A′. The contacts designated3fa,3fb,3fcin the set3fare, as indicated, in spaced-apart relation on the female receptacle.

With the contacts of the respective sets3f,3moriented as described and illustrated, the operating circuitry8of the mobile phone1with appropriate logic circuitry and/or programming functions to detect when there is a short circuit between any of the three contacts of the set3f. By detecting which of those contacts in the set3ffirst becomes grounded, or otherwise at a prescribed voltage, etc., the operating circuitry8can determine if the audio volume should be increased or decreased.

As an example, consider the female contacts3fa,3fband3fcin the set3f. If the male plug7is rotated in one direction relative the contacts in the set3f, then initially a male contact engages first one of the female contacts3fand then a second female contact and then a third female contact. If the male contacts are grounded or at some other known voltage potential, for example, the operating circuitry8may detect which female contact first is grounded, and which second, etc. This information indicates the direction in which the male plug is being rotated; such direction may be a representation of whether the audio volume is to be increased or decreased. The number of times that, for example, such first female contact is electrically engaged (connecting to) by a male contact and then no longer electrically engaged may be used by the operating circuitry as an indication of the extent to which the audio volume of the mobile phone1should be adjusted, e.g., increased or decreased.

As another example, it is possible that none of the male contacts in the set3mis connected to ground or to another source of reference voltage. Instead, for example, the middle female contact3fbmay be connected to ground, and by rotating the male plug, a given male contact3mmay couple either the female contact3faor3fcto the grounded female contact3fb. Depending on which of the female contacts3faor3fcfirst is coupled to ground or reference potential via the given male contact that couples the two female contacts electrically, this may be a representation of the direction of rotation of the male plug7relative to the female receptacle and, accordingly, the operating circuitry may understand such direction and adjust audio volume up or down based on that direction information. In this embodiment the male contacts in the set3mare passive and only have to connect electrically a pair of female contacts in a given order according to rotational direction. After direction is known, continued rotation of the male plug7will provide successive short circuiting and, thus, grounding, and then open circuiting, for example, of female contacts, and as such grounding and open circuiting occurs, the information representing the same can be used by the operating circuitry8to determine how much to increase or to decrease the audio volume.

With the male plug electrical terminal portion7iinserted in the hollow interior6isuch that the axes A and A′ are substantially congruent and the male and female contacts of the sets3mand3farranged as described above, the male plug7may be rotated about the axes A, A′ within the hollow interior. Such rotating rotates the male and female contacts. Signals, e.g., grounding and open circuiting, provided the operating circuitry may be decoded by the operating circuitry as a representation of direction of rotation, amount of rotation, and, therefore, whether to increase or to decrease audio volume and to what extent to increase or to decrease audio volume.

In using the mobile phone1with the electrical volume control2as described, a person may insert the audio plug7into the audio receptacle6placing the contacts3m,3fas described for operation, and also completing electrical connections between the mobile phone1and the accessory9or other device attached to the mobile phone via the connector system5. Then, the user may rotate the audio plug7about the axes A, A′ and thereby adjust or control the audio volume provided for sounds from the mobile phone speaker(s) and/or from the accessory(ies).

The portable communication device1is referred to herein as a mobile phone. However, as was mentioned above, reference to “mobile phone” includes various other electronic equipment or devices, such as, for example, those mentioned above. In outward appearance, for example, as is illustrated inFIG. 1, the mobile phone is of one type of design or style; however, the features of the invention, as are described in further detail below, may be used in other types of mobile phones, such as those that include cases that open and close (sometimes referred to as a “flip phone,” “slidable case phone,” etc.), and various other mobile phones that currently exist or may come into existence in the future.

In the exemplary embodiment of the invention described herein, the connector system5may connect the mobile phone1to an earphone speaker, to headphones, to external stereo speakers, to other types of accessories or devices, etc. (collectively referred to as accessories for brevity) that may be used with the mobile phone. Electrical signals may be coupled by the connector system5between the mobile phone1and one or more accessories; power connection also may be provided between the mobile phone and accessories. Adjustment of audio volume and/or of one or more other parameters may be provided by rotating the audio plug7.

It will be appreciated that the audio connector system5is backwards compatible, for example, in the following sense. If an audio plug7that does not include contacts3massociated therewith were plugged into the female receptacle6, rotating of the audio plug would not cause the above-described functions for adjusting volume. In such case the operating circuitry8of the mobile phone1may provide a standard audio output of mid-range volume that is not able to be adjusted.

The electrical connector system5connects the mobile phone1, e.g., the operating circuitry8thereof, with another device, e.g. an accessory9, a remote device, etc. Such electrical connector system5may be in the general form of an audio connector including both a female receptacle6and a male audio plug7that is intended to plug into the female receptacle. Features of the invention, including the electrical volume control (or other parameter control) may be carried out using other types of connector systems. Since many portable electronic devices already have an audio connector system, using that audio connector system to adjust or to control audio volume by rotating the male audio plug in its receptacle provides for such volume adjustment to be carried out without taking up additional space on the mobile phone for an audio volume adjusting mechanism.

As is seen inFIG. 1, the mobile phone1includes case (housing)11, speaker12, microphone13, display14, e.g., liquid crystal display, light emitting diode display, or other display, on/off switch15, and a number of keys generally indicated at16. The keys16may include a number of keys having different respective functions. For example, the key20may be a navigation key, selection key or some other type of key; the keys21,22may be, for example, one or more soft switches or soft keys (two examples are shown); and the keys23may be dialing keys. As an example, the navigation key20may be used to scroll through lists shown on the display14, to select one or more items shown in a list on the display to move a cursor shown on the display, etc. The soft switches21,22may be manually operated to carry out respective functions for which the key is designated by prior setting of the mobile phone, for example, or functions such as those shown or listed on the display14in proximity to the respective soft switch or selected by the navigation key20, etc. The dialing keys23may be used to dial a telephone number or to input alphanumeric or other data and the dialed number may be called by pressing a send key or one of the soft switches21,22. The speaker12, microphone13, display14, and keys16may be used and function in the usual ways in which a mobile phone typically is used, e.g. to initiate, to receive and/or to answer telephone calls, to send and to receive text messages, to connect with and to carry out various functions via a network, such as the Internet or some other network, to beam information between mobile phones, etc. These are examples; there may be other uses that currently exist or may exist in the future. The mobile phone1also includes operating circuitry8that responds to programming and to inputs, e.g., provided by a user pressing a key or applying a stylus or finger to a touch-sensitive screen, etc., or provided from an external source, such as an incoming telephone call or text message, to carry out functions of the mobile phone. As is seen inFIG. 1, part of the housing of the mobile phone is broken away to show an interior portion of the housing, including the operating circuitry8and the electrical connector system5.

As is seen inFIG. 2, the female receptacle6has one or more (in the illustrated embodiment three) electrically conductive terminal members (also referred to as electrically conductive terminals or parts)6a,6b,6c, and the male audio plug7has one or more (usually a corresponding number, in the illustrated embodiment three) electrically conductive terminal members7a,7b,7c. The respective electrically conductive terminal members6a-6c,7a-7cmay be, for example, contacts, pins, wires, terminals, electrically conductive traces on a printed circuit board, etc. (any of which is used synonymously herein). The terminal members6a-6care positionally arranged in the female receptacle6to be in or exposed to the hollow interior6iof the female receptacle6and the terminal members7a-7cof the male plug7are positionally arranged such that with the male plug inserted into the hollow interior6iof the female receptacle6, respective terminals are in paired alignment and electrical connection relation. For example, the terminals6a-6cwould be electrically connected to respective terminals7a-7c.

The terminal members6a-6cmay be conventional terminal members typically used in an audio female receptacle of an audio connector system. Such terminal members6a-6cmay fully circumscribe the axis A in the hollow interior6ior may only extend part way about the axis A, or they may be otherwise configured. The terminal members7a,7calso may be conventional as are used in conventional audio plugs. Electrical insulation7smay be used to separate respective adjacent terminal members7a-7c, as is illustrated, for example.

It is noted, as mentioned above, that the form factor of the female receptacle6, particularly the hollow interior6ithereof, may be like a standard receptacle for an audio jack, for example. Therefore, if a standard audio plug (audio jack)7were plugged into the receptacle6, electrically conductive connections between respective terminals of the receptacle and the audio plug may be achieved. Also, it will be appreciated that although examples herein may be directed to audio connection and audio jacks or connectors, etc., the invention may be used with other types of connections and connectors.

Electrically conductive path30, e.g., wires, conductive traces on printed circuit boards, etc., from respective electrical terminal members6a-6care provided to the operating circuitry8of the mobile phone1, and a similar electrical connector path31is provided from the female contacts3fto the operating circuitry8. Electrically conductive path32, e.g., wires, conductive traces on printed circuit boards, etc., some of which may be within the inside or core of the male plug7, are provided to the accessory, remote device, etc.9.

Turning toFIG. 3, a schematic block system diagram of operating circuitry8of the mobile phone1is illustrated. The illustration is exemplary; other types of circuitry may be employed in addition to or instead of the operating circuitry8to carry out the various functions of a mobile phone and the various functions described in detail herein. The operating circuitry includes an operational control40that controls the various components of the operating circuitry8. An input module41provides inputs to the operational control40, such as, for example, inputs from the various keys16. Inputs also may be provided from the display14if it is a touch screen type of display, and inputs also may be provided the input module41from other connections to the mobile phone, etc. The display14may be a touch screen that provides for inputs to the input module41by touching using a finger, a stylus, or some other device, and the result of such touching may be provided as inputs to the operational control40. The operational control40also may operate the display14to determine what information, icons, images, etc. is shown on the display14.

The electrical volume control includes a logic direction decoder40acoupled by connection31to provide its output signal as an input to the operational control40. In response to such input the operational control40may adjust or control audio output or some other parameter of the speaker12or of another device, e.g., accessory9, etc., as was described above.

The accessory9is coupled to the operating circuitry8via the connector system5. More particularly, the accessory9is connected to the operational control40of the operating circuitry and operates in response to the operational control40and/or in response to receiving other suitable input. The accessory9also may provide input to the operating circuitry8via the connector system5.

Electrical power may be provided by the operational control40to the accessory9. Program code in the operating circuitry8, e.g., stored in the memory43, may control operation of the operational control40to operate the accessory9. Circuitry in and/or programming in the operating circuitry8and/or operational control40may determine various operational features of the mobile phone1and/or the accessory9.

As an example, the operational control40may be a microprocessor or some other electrical or electronic device that is responsive to various inputs, e.g., input signals, and provides various outputs, e.g., output signals. The operational control40may be internally programmed or manufactured in a way to include internal programming thereof to carry out various functions. However, in many instances an operational control40of a mobile phone1would have associated therewith the memory43in which appropriate programming instructions, computer program, logic, etc., may be provided the operational control40to carry out the functions thereof. The memory may include identity information concerning respective accessories and settings of the operating circuitry in response to respective identity information. The memory43also may include storage for telephone numbers and other information concerning contacts who may be called, messaged, etc. using the mobile phone1, storage of photographs and/or other data, as often is the capability of such memory in conventional mobile phones, for example, and the memory may be used for other purposes that may come into existence in the future. The memory43may be a read only memory, random access memory (RAM), flash RAM, programmable read only memory, or some other memory device. Also associated with the operational control40is a timer44that can be used to provide timing signals representing increments of time for synchronizing operation of the operating circuitry8with some other device, for clock/calendar control functions, and/or for determining amount of time (duration) for the hold on function and/or for a screensaver function.

The operating circuitry8also includes a communications module45that receives inputs from microphone13and provides outputs to the speaker12, as are common functions in a mobile phone. An antenna46may be coupled to the communications module45to transmit and to receive signals representing telephone communications, data communications, messages, etc. The communications module45may operate under control of the operational control40in the usual manner of a mobile phone. Additionally, the communications module45may provide an input to the operational control40to indicate that there is an incoming telephone call or text message; and in response thereto, the operational control40may operate the display14in conventional manner, e.g., to indicate an incoming phone call, to show a text message or photograph, etc.

A power supply47provides electrical power to the operating circuitry8and/or to other parts of the mobile phone1via the on/off switch15. The power supply may be a conventional battery or some other source of electrical power. Upon closing the on/off switch15, the power is provided the operating circuitry8to carry out the various functions described herein, for example. If desired, closing the switch15may lead to temporary operation of the display to display a start-up message or indication, and then a power saving feature, e.g., a screensaver function, may be implemented to turn off the display.

Operation of the mobile phone1may be under computer program control or the like. Such operation may be as is performed to carry out the functions of a mobile phone. Operation of the accessory9may be carried out under computer program control or the like. Such operation also may be as is performed in a conventional manner. The computer programs and computer program control may be carried out by persons who have ordinary skill in the art to prepare and to use such programs and control. New computer program control techniques and methods also may be developed in the future by persons having ordinary skill in the art and may be used in connection with the connector system and mobile phone and accessories.

Briefly referring toFIG. 6, an exemplary block diagram, also referred to as a logic diagram, routine or flow chart, is illustrated at140. The logic diagram includes a number of steps that represent an example of operation of the various mobile phone1having an electrical volume control2, as is describe herein. Other operational examples also are possible. The several steps that are illustrated and described inFIG. 4may be carried out using computer program software or the like that may be provided the mobile phone1and/or the accessory9. Such software may be written in an appropriate computer language or code by a person who has ordinary skill in the art based on the disclosure herein. The functions illustrated in the logic diagram140that are described below may be carried out by the operating circuitry8. The program code may be stored in the memory43.

In the logic diagram140, at block142is start and/or initialization. This may represent a turning on of the mobile phone1, for example. At block144is an inquiry whether an input representing grounding of female contacts3fhas occurred. If so, then there is a rotation of the male plug7. At block146the direction of rotation is determined. At blocks148and150the audio amplitude is appropriately adjusted. The routine may repeat until there is no further rotation occurring.

It will be appreciated that portions of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the described embodiment(s), a number of the steps or methods may be implemented in software or firmware that is stored in a memory and that is executed by a suitable instruction execution system. If implemented in hardware, for example, as in an alternative embodiment, implementation may be with any or a combination of the following technologies, which are all well known in the art: discrete logic circuit(s) having logic gates for implementing logic functions upon data signals, application specific integrated circuit(s) (ASIC) having appropriate combinational logic gates, programmable gate array(s) (PGA), field programmable gate array(s) (FPGA), etc.

The above description and accompanying drawings depict the various features of the invention. It will be appreciated that the appropriate computer code could be prepared by a person who has ordinary skill in the art to carry out the various steps and procedures described above and illustrated in the drawings. It also will be appreciated that the various terminals, computers, servers, networks and the like described above may be virtually any type and that the computer code may be prepared to carry out the invention using such apparatus in accordance with the disclosure hereof.