Patent Publication Number: US-2022229496-A1

Title: Customizable and reconfigurable virtual instrument panel

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a Continuation of U.S. application Ser. No. 17/129,471, filed on 21 Dec. 2020, which is a Continuation of U.S. application Ser. No. 16/412,184, filed on 14 May 2019, which was issued as U.S. Pat. No. 10,871,831 on 22 Dec. 2020, which is a Division of U.S. application Ser. No. 15/785,006, filed on 16 Oct. 2017, which was issued as U.S. Pat. No. 10,310,627 on 4 Jun. 2019, which is a Division of U.S., application Ser. No. 14/841,144, filed on 31 Aug. 2015, which was issued as U.S. Pat. No. 9,829,993 of 28 Nov. 2017, which is a Division of U.S. application Ser. No. 13/761,064, filed on 6 Feb. 2013, which was issued as U.S. Pat. No. 9,122,306 on 1 Sep. 2015, which is a Continuation of U.S. application Ser. No. 13/462,687, filed 2 May 2012, which was issued as U.S. Pat. No. 8,384,536 on 26 Feb. 2013, which is a Divisional application of U.S. application Ser. No. 12/422,793, filed 13 Apr. 2009, which was issued as U.S. Pat. No. 8,198,994 on 12 Jun. 2012, wherein the entirety of each is incorporated herein by this reference thereto. 
     U.S. application Ser. No. 13/761,044, filed on 6 Feb. 2013, which was issued as U.S. Pat. No. 8,952,798 on 10 Feb. 2015, is also a Continuation of U.S. application Ser. No. 13/462,687, filed 2 May 2012, which was issued as U.S. Pat. No. 8,384,536 on 26 Feb. 2013, which is a Divisional application of U.S. application Ser. No. 12/422,793, filed 13 Apr. 2009, which was issued as U.S. Pat. No. 8,198,994 on 12 Jun. 2012. 
    
    
     BACKGROUND OF THE INVENTION 
     Technical Field 
     The invention relates to the field of controlling a graphical user interface. Specifically, the invention relates to providing customizable and reconfigurable physical controls for controlling a graphical user interface. 
     Description of the Related Art 
     Modern media products have increasingly been designed to be digital. Likewise, the controls associated with digital media products have become increasingly sophisticated and their user interfaces have become more complicated. For example, it is sometimes difficult to locate and navigate media controls on modern media receivers. 
     The difficulty in navigating multimedia devices is compounded when one attempts to access a multimedia device in a vehicle. Averting one&#39;s eyes from the road and surrounding environment to access a complicated media user interface presents a significant danger to the driver and passengers, as well as to the occupants of other vehicles. These modern digital media devices do not provide adequate user-friendliness, such that a driver can access the full functionality of the device without averting his eyes from the road. 
     Instrument panels in modern vehicles have become increasingly crowded, often introducing an undesirable level of distraction to the driver. Despite this increasing level of sophistication, vehicles cannot easily be customized to an individual driver&#39;s tastes. Given the innate desire of humans to customize environments in which they live and work, this is a serious shortcoming. 
     To address these deficiencies, several automobile manufacturers have introduced glass cockpits, in which control interfaces are presented to the driver on touch screen surfaces, such as LCD displays. These systems allow the same dashboard real estate to be used for several different control interfaces. Each interface is displayed on an as needed basis, based on the context of the user interaction. 
     While the benefits this approach offer simplification and conservation of space within the dashboard, the interfaces presented are often not easily reconfigured by the end user. Furthermore, many individuals desire the haptic tactile sensation of more conventional analog media devices provided by actual needles, dials, and gauges. Many modern digital media devices do not provide the tactile sensation offered by physical control knobs, sliders, and buttons. 
     Several computer programs, such as LabView®, (manufactured by National Instruments, based in Austin, Tex.) allow a user to design customized interfaces by selecting knobs and sliders from a toolbox, placing them on a virtual instrument panel, and assigning the output of the knobs and sliders to other devices or functions. While such systems can be designed to be customizable, they still do not provide the tactile sensation of physical control knobs. 
     SUMMARY OF THE INVENTION 
     The invention provides an instrument control panel that is easily customized and reconfigured, and yet provides the familiar tactile sensation of physical knobs, sliders, and buttons. 
     Additionally, disclosed is a technique for customizing the look and feel of a vehicle instrument panel. The customization addresses both the specific functional needs and the personal tastes of particular passengers and drivers. More specifically, the invention offers the advantages of an LCD control panel, such as flexibility and easy reconfiguration, and provides the familiar look and feel of physical indicators. 
     It should be noted that while the advantages of the invention are most easily seen in the context of a dashboard instrument panel, it may be applied in other types of media interfaces, as well as other areas of a vehicle, such as in headrest displays and other rear-passenger consoles. Additionally, the invention is applicable to all types of vehicles including, without limitation, automobiles, boats, trains, airplanes and the like. 
     In some embodiments of the invention, a stand-alone instrument panel is provided with an interface display and one or more removable, customizable interface components. In some other embodiments, the instrument panel is integrated into other devices, vehicles, etc. In a presently preferred embodiment of the invention, the interface display is a liquid crystal display (LCD) screen. 
     In some embodiments of the invention, the interface components are magnetically and/or inductively coupled with one or more encoders through the interface display. According to some of these embodiments, such encoders are inductively powered by movement of a mechanism in the interface component and the encoder uses the induced power to generate a signal used to control a device. In other embodiments, the device is controlled by the interface components through the use of reflective sensors, Hall Effect sensors, or other position determination means now known or later developed. 
     In some embodiments of the invention, a grid of encoders is provided with a backing that can be coupled with the interface display, such that one or more interface components are removably coupled to the front side of the interface display and used to control a function of a corresponding device. 
     In some embodiments, the interface display and the interface components control a multimedia/audiovisual device. In other embodiments, the interface display and the interface components control a Global Positioning System (GPS) apparatus. In yet other embodiments, the interface display and the interface components control a hybrid apparatus, including both an audiovisual device and a GPS apparatus. Although specific uses are provided, it will be readily apparent to those with ordinary skill in the art having the benefit of this disclosure that a wide variety of interfaced devices, now known or later developed, could equally be controlled using the removable and customizable interface components according to the invention. 
     In some embodiments, the interface components comprise buttons, sliders, and/or other known tactile interface components. In the presently preferred embodiment, the reconfigurable and customizable interface is integrated into the dashboard of a vehicle. However, it will be readily apparent that other locations within a vehicle are equally applicable. 
     In some embodiments of the invention, one or more pre-packaged or custom skins are provided for the interface display. According to these embodiments, the skins ideally represent status attributes of the controlled device and/or the proper placement area for an interface component. Such skins can also designate user affinity to an organization or may include advertising. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic front view of a customizable and reconfigurable instrument panel according to some embodiments of the invention; 
         FIG. 2A  is a schematic side view of a knob apparatus according to some embodiments of the invention; 
         FIG. 2B  is a schematic illustration of a processing circuit for an interface display according to some embodiments of the invention; 
         FIG. 2C  is a schematic side view of an alternative encoder apparatus according to some embodiments of the invention; 
         FIG. 3A  is a schematic side view of a specific implementation of a reconfigurable interface display using a plurality of encoders, each coupled to an umbilical cord according to some embodiments of the invention; 
         FIG. 3B  is a schematic exploded isometric view of a reconfigurable interface display with a backing grid of encoders according to some embodiments of the invention; 
         FIG. 4A  illustrates a controllable interface display and a grid of encoders configured to control a radio according to some embodiments of the invention; 
         FIG. 4B  illustrates another example of a controllable interface display for a GPS apparatus according to some embodiments of the invention; 
         FIG. 5A  illustrates a side and front schematic view of a knob according to some embodiments of the invention; 
         FIG. 5B  illustrates a side and front view of a button according to some embodiments of the invention; 
         FIG. 5C  is a schematic top and side view of a slider control according to some embodiments of the invention; 
         FIG. 6A  is a schematic isometric representation of the front side of an LCD display interface with a plurality of interface components comprising a plurality of slider handles and a plurality of knobs according to some embodiments of the invention; 
         FIG. 6B  is a schematic isometric representation of the back side of the LCD display interface according to some embodiments of the invention; 
         FIG. 7  is a control interface for a multimedia device with an LCD display within the dashboard of an automobile, configured to be controlled using removable, reconfigurable and customizable interface components according to some embodiments of the invention; 
         FIG. 8A  is an equalizer themed skin comprising a display of various frequency response controls according to some embodiments of the invention; 
         FIG. 8B  illustrates a level adjustment themed skin according to some embodiments of the invention; and 
         FIG. 8C  illustrates a radio tuner themed skin displaying tuner information according to some embodiments of the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The invention comprises a user interface that is easily customized and reconfigured, and yet provides the familiar tactile feel of physical knobs, sliders, and buttons. The user interface comprises one or more interface components that are removably coupled to an interface surface. The interface components communicate with one or more control components disposed behind the interface surface. In some embodiments of the invention, the interface surface is substantially flat. In some embodiments the interface surface is passive, meaning it is not a display. In some other embodiments, the interface surface is further configured to display information. According to these embodiments, the interface displays information related to the function of the interface components. The invention lends itself particularly well to an instrument panel, for example in a vehicle, such as an automobile. 
     Customizable Instrument Panel 
       FIG. 1  illustrates the customizable and reconfigurable instrument panel according to some embodiments of the invention.  FIG. 1  shows a media device  100  having an interface display  199  and a number of static interface components:  101 ,  102 ,  103 ,  104 ,  105 , and  106 . Customizable interface components  107 ,  108 , and  109  are removably coupled to the interface. The removable interface components  107 ,  108 , and  109  are configured to control one or more aspect of the media device  100 . In some embodiments of the invention, the interface surface does not necessarily comprise a display. 
     In some embodiments of the invention, the media device  100  comprises a multimedia receiver that is coupled to an audiovisual output (not shown). According to these embodiments, the removable interface components  107 ,  108 , and  109  control various functions of the multimedia device, e.g. volume, terrestrial radio tuning, satellite radio tuning, balance, frequency response, etc. 
     The removable interface components  107 ,  108 , and  109  are depicted as knobs. However, it will be readily apparent to those having ordinary skill in the art having the benefit of this disclosure that a number of other interface components are equally applicable. For example and as explained below, slider and button interface components are especially applicable and useful in some embodiments of the invention. 
     In some embodiments of the invention, the user interface components  107 ,  108 , and  109  are positioned by the end user in a desired location on a media device interface display  199 . The interface display  199  may be chosen from among standard structural materials such as, for example, aluminum, stainless steel, or plastic. In the presently preferred embodiments, the interface display  199  is a liquid crystal display (LCD). 
     In the case of interface display  199  as an LCD, a number of labels and/or other identifying and instructive information for the interface components  107 ,  108 , and/or  109  may be added by the user through an input (not shown) or may be preloaded in the form of one or more skins (explained below). For example, when coupling an individual component  107 , a prompt is automatically displayed on the interface display  199  which requests that the user choose a function for dedicating to that component  107 , for example volume control. By choosing the volume control, the user dedicates that component  107 , to volume control and the word “Volume” is preferably displayed next to the component  107 . 
     In some other embodiments, the components  107 ,  108 , and/or  109  automatically communicate a dedicated function to the display  199 , such that the display automatically depicts its function on the LCD when it is coupled with the interface display  199 . 
     The interface components control a particular function and/or an auxiliary component of the media device. In some embodiments of the invention, positional data is output from the interface component and is communicated to the device. The positional data is then translated into a signal that is used to control the particular device or function. For example, a scalar value representing the absolute angular position of a knob within its rotational range is detected and is then associated with a particular device or function. Various means for the determination of interface component position are explained below. 
     Referring again to  FIG. 1 , the customizable interface components  107 ,  108 , and  109  are secured against the interface display surface, preferably by magnets (not shown). Specifically, the interface components  107 ,  108 , and  109  are visible and accessible to the end user on the user side of the interface display surface  199  and are each matched by a magnetically attracted control component on the backside of the interface display surface  199 . 
     Determination of Interface Component Position 
     The angular position of a knob, or linear position of a slider, may be determined in any of several different ways. For example, a grid of sensors and a set of reflective markings can be used to determine the position of the interface components. According to these embodiments, a set of sensors are positioned around the perimeter of the interface display surface. Additionally, the interface components include a set of reflective marks used by the sensors. The sensors detect the position of markings placed on the edges of the interface components. For example, markings reflective at IR wavelengths may be applied to the perimeter of a knob and, when illuminated by IR emitters proximal to the sensors, used to determine the angular position of the knob. Patterned markings (e.g. variations in spacing or thickness) can uniquely identify the knob from among other knobs on the interface display surface. 
     Alternatively, the position of an interface component can be determined by the interface display surface directly. For example, the information gathered by the scanning elements within an optical scanning display can be analyzed to determine the translational and rotational position of a knob based on patterned markings on the surface of the knob closest to the display. An example of such an optical scanning display is achieved by a compact multi-touch panel developed by Sharp Electronics Corporation, located in Romeoville, Ill., the panel having an approximate 1-mm depth with an optical sensor integrated into each pixel. 
     In some other embodiments, one or more pairs of orthogonal Hall effect sensors may be placed within a control component located behind the interface display surface, and a magnet may be placed within an interface component. The magnet within the interface component produces a magnetic field that varies as the interface component is rotated or otherwise displaced. The orthogonal sensors measure these variations in the magnetic field to determine the orientation of the magnet and therefore the rotational position of the knob. According to these embodiments, the determined position of each knob is preferably transmitted wirelessly back to a processor or directly to the associated device or function. Various means for wireless communication include, but are nor limited to an RF signal, an IEEE 802.11 protocol signal and a Bluetooth® signal. 
     In some embodiments of the invention an LCD is used as the interface display surface. The LCD displays a regular pattern beneath the knob, which can be analyzed by an optical sensor within the knob to determine the knob&#39;s angular position, using techniques similar to those used by optical mice. According to these embodiments, the determined position of each knob is preferably transmitted wirelessly back to a processor or directly to the associated device or function. 
     While explicit examples of position determination means are provided, it will be readily apparent to those with ordinary skill in the art having the benefit of this disclosure that a wide variety of position determination means, now known or later developed, could be equally applicable to yield same or similar results. 
     Additionally, in some embodiments, the mechanical rotation of the knob by a user generates inductive power for one or more optical encoders located in the control component that is behind the control panel surface. A voltage is induced that is used to power an encoder. The encoder then determines the rotational position of the knob. According to these embodiments, the determined position of each knob is preferably transmitted wirelessly back to a processor or directly to the associated device or function. 
       FIG. 2A  is a schematic side view of a knob apparatus  208  removably and magnetically coupled to an interface display  299 , as well as a corresponding encoder apparatus  220  that is positioned on the opposite side of the interface display  299 . According to some embodiments, the knob apparatus  208  comprises a knob  210  which rotates within a knob housing  209  within one or more bearings  211 . One or more magnets  212  are disposed within the knob  210 , such that the magnets  212  rotate with the knob  210 . In some embodiments, the magnets  212  are mounted flush with the bottom surface of the knob  210 . In some embodiments of the invention, the knob  210  and magnets  212  are disposed such that a gap  213  exists between the magnets  212  and the bottom surface of the knob  210  and the interface display surface  299 . According to these embodiments, the movement of the knob  210  and the magnets  212  will not damage the interface display surface  299 . 
     To further guard against damage to the interface display surface, some embodiments of the invention incorporate a transparent protective layer between the interface components and the interface display surface. For example, a thin acrylic or polycarbonate sheet can be affixed to the interface display surface. The sheet protects the potentially delicate surface (e.g, in the case of an LCD) from damage by contact from the moving surfaces and edges of the interface components. In those embodiments in which the interface display comprised an LCD, the sheet additionally mitigates impairments to the rendered image caused by compression of the liquid crystal material during operation of the interface components. 
     The encoder apparatus  220  is disposed opposite of the knob apparatus  208  through the interface display surface  299 . The encoder comprises an encoder housing  221  that encases an encoder body  222  that has one or more magnets  223  disposed within. As shown, the magnets  223  are flush mounted in the encoder body  222 . The encoder body  222  rotates within the encoder housing  221  within one or more bearings  225 . Also on the encoder body  222  are encoder markings  224 . An offset  298  is disposed between the magnets  223  and the interface display surface  299 , such that the magnets  223  cannot damage the interface display surface  299  as they move. In some embodiments, the magnets  223  are fully embedded within the encoder body  222  such that the gap  298  exists between the encoder body  222  and the interface display surface  299 . 
     The knob apparatus  208  and the encoder apparatus  220  are configured such that the magnets  212  and  223  magnetically couple the knob apparatus  208  to the encoder apparatus  220  through the interface display surface  299 . The magnets  212  also relay an angular displacement of the knob  210  to the encoder body  222  within the encoder apparatus  220 . As such, the encoder markings  224  are displaced as the knob rotates. 
     Also within the encoder housing  221  are an emitter  226  and a detector  227 . The emitter  226  and the detector  227  establish the position of the encoder body  222  by determining the position of the encoder markings  224 . 
     In some embodiments of the invention, this position information is communicated through a housing shaft  228  to an umbilical cord  229  and to a processor (not shown). In some other embodiments, the position information is communicated wirelessly. 
       FIG. 2B  is a schematic illustration of a processing circuit  230  for an interface display  231 , including a knob apparatus  208  and an encoder apparatus  220  according to some embodiments of the invention. As explained above, the encoder apparatus  220  detects rotational information from the knob apparatus  208  and communicates it to a processor  232 . As shown, the encoder apparatus  220  wirelessly communicates the knob apparatus&#39; angular position to the processor  232 . The processor  232  is coupled to a memory device  233 , as well as various other audio/visual components such as a GPS receiver  234 , a stereo receiver  235  having connected speakers  236 , or an auxiliary component  237 , among others now known or later developed. In some embodiments of the invention, the processor  232  is coupled directly to the interface display  231  for communicating display information. 
       FIG. 2C  is a schematic side view of an alternative encoder apparatus  200 ′ according to some embodiments of the invention. The encoder apparatus  200 ′ comprises an encoder  242  housed within a bracket  244  and coupled to adapter  240  via a shaft  243 . The shaft is fit with a bushing  245  and the adapter  240  is coupled to the shaft via a set screw  246 . The adapter  240  is configured with a plurality of magnets  241  that magnetically couple with a corresponding knob apparatus (not shown). The encoder apparatus has an offset  249  such that the adapter  240  does not directly contact a display surface (not shown). According to these embodiments, the bracket  244  and adapter  240  can be retrofit to most any existing encoder apparatuses. 
     In those embodiments of the invention incorporating a rotating magnet placed behind the display, force feedback and/or damping sensations may be provided to the knob in front of the display. One method of providing damping comprises enclosing the knob or encoder body within a viscous fluid. 
     Specific Implementation of a Re-Configurable Interface 
     As explained above, the mechanical rotation of a knob by a user generates power that is provided to an optical encoder which is located behind the interface display. The positional information determined by the encoder is transmitted wirelessly back to a processor. In some embodiments, the encoder on the backside of the interface display may be connected to a power supply and a processor by an umbilical cord. The umbilical cord provides power to the encoder and carries the encoder measurements back to the processing unit. 
       FIG. 3A  is a schematic side view of a specific implementation of a reconfigurable interface display  300  that uses a plurality of encoder apparatuses  399 . The encoder apparatuses  399  are configured to couple with knobs (not shown) through the interface display  301  as explained above. Additionally, the encoder apparatuses  399  are kept in place against the interface display  301  using T-slots  398 . The T-slots  398  keep the encoder apparatuses  399  from falling off the backside of the interface display  301  when the knob is removed. Each encoder apparatus  399  is coupled to an umbilical cord  395 . In some embodiments, the T-slots extend into the page the whole width of the interface display. Additional T-slots (not shown) extend in the vertical dimension (between the bottom and top of the interface display) to create an intersecting grid of T-slots. According to these embodiments, the encoder apparatuses  399  (and therefore the corresponding knobs) can be moved around the interface display  301  in a two-dimensional grid pattern. 
       FIG. 3B  is a schematic, exploded isometric view of an interface display  301  having a backing grid of encoder apparatuses  389 . According to these embodiments, a plurality of interface components (not shown) are removably coupled to the interface display  301  according to the pattern of the grid of encoder apparatuses  389 , such that one or more individual encoder apparatuses  399  communicate rotational and/or other movement information to a processor (not shown). According to  FIG. 3B , the interface display  301  comprises an LCD. 
     In some embodiments of the invention, the interface display  301  displays a representation of an empty grid of boxes  375 . According to these embodiments, the empty boxes  375  indicate an available location for an interface component to be placed. In some embodiments, each box  375  is assigned with the ability to control one particular function. For example, a particular box  375  may be assigned with the ability to control the volume level of a multimedia device to which the control interface  301  is coupled. According to these embodiments, a prepackaged skin is displayed on the control interface  301  to indicate which box  375  controls which function. 
     Implementation Examples 
       FIGS. 4A and 4B  illustrate two examples of customizable and reconfigurable virtual instrument panels that use a grid of encoders.  FIG. 4A  illustrates a controllable interface display  401  and a grid of encoders  489  that are configured to control a radio (not shown). The controllable interface display  401  includes a number of dedicated controls  402 ,  403 ,  404 ,  405 ,  406 ,  407 ,  408 ,  409 , and  410  that control certain aspects of the radio. Furthermore, a number of interface components  411 ,  412 , and  413  are removably coupled to the interface display  401 . Each of these interface components  411 ,  412 , and  413  can be configured to control another function of the radio. The interface display  401  also displays information  420  such as current radio station setting, and includes virtual level dials  421 ,  422 , and  423  that are used to indicate a current position of the interface component  411 ,  412 , or  413  within a function range. For example, as shown the information  420  indicates that the tuner is presently set to an FM station 91.50 MHz. Because the interface component  411  is presently dedicated to tune the radio station, an indication is shown on virtual level dial  421  at this point where the present station (91.50 FM) falls within the spectrum of available stations. 
       FIG. 4B  illustrates another example of a controllable interface display  401 ′ according to some embodiments of the invention. According to  FIG. 4B , the controllable interface display  401 ′ and corresponding grid of encoders  489 ′ control the function of a global positioning system apparatus (GPS). As shown, the controllable interface display  401 ′ displays a GPS map  422 ′. Furthermore, interface components  411 ′,  412 ′, and  413 ′ are configured to control various functions of the GPS apparatus, such as panning, zooming, and rotating. 
     Although specific implementations are explicitly disclosed in  FIGS. 4A and 4B , it will be readily apparent to those with ordinary skill in the art having the benefit of this disclosure that a wide variety of functions controlled through interfaces, now known or later developed, are able to take advantage of the present invention. 
     Examples of Specific Reconfigurable Interface Controls 
     As explained above, reconfigurable knobs are used to control a device through an interface display surface.  FIG. 5A  is a side and front schematic view of a knob  501  according to some embodiments of the invention. The knob&#39;s  501  position is determinable via a variety of ways, as explained above. Other means for controlling a knob  501  will be readily apparent to those having ordinary skill in the art having the benefit of this disclosure. 
     In some embodiments of the invention, one or more removable and reconfigurable buttons are used to control a device.  FIG. 5B  illustrates a side and front view of a button  502  according to some embodiments of the invention. The button comprises a base  503  and a substantially resilient depressible cover  504 . 
     In some embodiments of the invention, the button  502  is implemented in conjunction with a transmitting and receiving antenna located within a control apparatus (not shown) on the backside of the display surface (not shown). The button comprises an LC circuit within the base  503  of the button on the front side of the display surface. The antenna transmits an RF signal at the resonant frequency of the LC circuit, thereby establishing a “ringing” within the LC circuit. The antenna is configured to listen to hear if the LC circuit is ringing. When the user presses the button  502 , the LC circuit is shorted and no ringing is possible. If no ringing is heard by the antenna, the button  502  is determined to be depressed. The control apparatus then communicates that the button has been actuated to the device that the button is configured to control. Although a specific example of button control is explicitly disclosed, it will be readily apparent to those with ordinary skill in the art having the benefit of this disclosure, that numerous other button control implementations are able to be taken advantage of to yield similar results. 
     In some embodiments of the invention, a slider control is used as an interface component to control one or more device, such as a media device.  FIG. 5C  is a schematic top and side view of a slider  505  control according to some embodiments of the invention. The slider  505  comprises a base  506  and a sliding handle  507 . In some embodiments of the invention, one or more sliders  505  are controlled with one or more encoders as explained below. 
       FIG. 6A  is a schematic isometric representation of the front side of an LCD interface display  600  having a plurality of interface components comprising a plurality of slider handles  610 ,  620 , and  630  and a plurality of knobs  640 ,  650 , and  660 . According to  FIG. 6A , the slider handle  630  is raised to an elevated position relative to the slider starting position at which the slider handles  610  and  620  are shown. 
       FIG. 6B  is a schematic isometric representation of the backside of the LCD interface display  600 . In some embodiments, a group of control components  611 ,  621 , and  631  are positioned on the backside of the interface display for magnetic coupling to slider handles  610 ,  620  and  630  on the front side of the interface display, as desired by the user. 
     As shown, the backside of the interface display  600  contains the control components  611 ,  621 , and  631 , which magnetically, and/or inductively couple with the slider handles  610 ,  620 , and  630 . In some embodiments, the control components  611 ,  621 , and  631  are the moving elements within linear encoders  613 ,  623 ,  633  (shown in phantom). According to these embodiments, the control components  611 ,  621 , and  631  determine the position of the handles  610 ,  620 , and  630 . It will be apparent to those with ordinary skill in the relevant art having the benefit of this disclosure that various other means for determining the position of the handles  610 ,  620 , and  630 , now known or later developed can be implemented to accomplish the invention. 
     Spring fixtures  612 ,  622 , and  632  are also disposed below the control components  611 ,  621 , and  631  and couple with the control components  611 ,  621 , and  631 , respectively. The spring fixtures include springs and are configured to cause the control components  611 ,  612 , and  613  to return to a rest position when magnetically de-coupled from the handles  610 ,  620 , and  630 . In some other embodiments gravity accomplishes returning the control components  611 ,  612 , and  613  to their rest positions. 
     In some other embodiments, a group of linear encoders are configured horizontally on the back side of a display interface. The linear encoders include control components having rest positions at the left or right edge of the display interface. According to these embodiments, a user can place a handle at various vertical positions on the display interface and slide them horizontally. In other embodiments, a group of linear encoders are disposed in a grid for tracking both horizontal and vertical motion of the control component through the grid. According to these embodiments, a magnetic slider handle placed on the front side of the display interface magnetically couples with the control component. Moving the slider handle causes the control component to move through the grid. This motion is tracked by the linear encoders and serves as a two-dimensional control input. 
     Other Variations of Interface Component Control 
     In some other embodiments of the invention, users purchase specific interface components to extend the functionality of the controlled device. Each interface component is equipped with a passive RFID chip. An excitation coil behind the display provides power to the RFID chips, and the transmitted RFID is a key that identifies the interface component and unlocks the desired functionality. (That is, the controlled device is capable of the functionality upon manufacture, but the functionality is locked until an appropriate interface component is detected.) Key pairs allow a specific interface component to be programmed for use on a specific device, thus preventing the sharing or theft of interface components that extend functionality. 
     Preferably, an excitation coil and RFID receiver are located within or very near each control component to which an interface component can be magnetically coupled. Additionally, the transmitting antenna within the interface component preferably shapes the transmitted RFID signal such that it is only receivable by the receiver within the most proximal control component. These localization techniques allow each control component to determine the identity of the individual interface component to which it is coupled and, therefore, how the position information determined by the control component signal should be interpreted. For example, if an interface component containing an RFID indicating that it is a volume knob is attached to an encoder, the output from the encoder is used to control the volume. 
     In another variation of the invention, the front side of the display may be fitted with a touch sensing technology, for example a capacitive or an infrared breakbeam, that allows the position of the attached knobs to be determined directly. If combined with the RFID localization techniques, the interface displayed beneath the knobs can be adjusted automatically. For example, a “VOLUME” label and scale may be placed behind the sensed location of a knob, identifying it to the user as a volume knob. 
     In another variation of the invention, the advantages of reconfigurable and customizable interface components are synergistically combined with the advantages of speech recognition technology to yield extremely user friendly interfaces. For example, a media device having an LCD interface may be configured with the reconfigurable interface components and speech recognition functionality. According to these embodiments, a user declares an intended function of an interface component as the physical component is placed onto the LCD interface. The previous example is especially beneficial when the user is not presently able to look at the interface to configure the appropriate control with the desired function. Therefore, these particular embodiments particularly lend themselves to automobile interface applications. 
     Reconfigurable and Customizable Automobile Interface 
     As explained above, it is extremely useful to implement the reconfigurable and customizable interface applications of the invention in an automobile, such that a driver can easily control a media device, a GPS device, or the like.  FIG. 7  illustrates a control interface  701  for a multimedia device having an LCD interface display  702  within the dashboard  710  of an automobile, and configured to be controlled using removable, reconfigurable and customizable interface components  703 ,  704 , and  705 . 
       FIG. 7  also illustrates a pool  799  of knobs  797  integrated into the center console  798  of the automobile. The pool  799  of knobs  797  comprises a stash of knobs  797  that could be grabbed as new interface components are needed for the interface. According to some embodiments of the invention, the pool  799  of knobs  797  is positioned such that a driver can easily access a new knob  797  without averting his eyes from the road. 
     Reconfigurable Instrument Indicators 
     In some embodiments of the invention, changes in the attributes controlled by the interface components are communicated to and displayed on the interface display. Specifically, the control components are driven and thereby cause a magnetically coupled interface component to move, thus indicating the changed status of the attribute. In some embodiments, a knob and encoder apparatus are located on opposite sides of an interface display, as explained in  FIG. 2A  above, and the encoder body may be driven to adjust the rotational position of the knob. In some embodiments of the invention, the knob on the front side of the interface display is fitted with an indicator, e.g. a needle. As the encoder body on the backside of the interface display is moved, the indicator on the front side of the interface display moves therewith simultaneously. An interface display such as an LCD may be used to place an appropriate scale behind the indicator. 
     Customizable Appearance Themes/Skins 
     In some embodiments of the invention, a driver specifies characteristics such as the color, size, and font of the alphanumeric data displayed on the control panel. Notably, the font may be increased for drivers or passengers with below average visual acuity. Similarly, the shape and size of the soft controls may be specified. For convenience, predefined sets of controls may be selected as themes or skins. 
     Further, background images may be placed on the instrument panel in digital form, such as pictures of family, pictures of familiar places, corporate logos, and/or advertisements. Slide show functionality similar to computer screen savers can be selected. Instrument panel skins can also be offered. The invention is applicable to nearly any instrument, such as speedometers, odometers, fuel and temperature gauges, radios, and others. 
       FIGS. 8A-8C  illustrate an assortment of various skins for a multimedia device interface display according to some embodiments of the invention.  FIG. 8A  illustrates an equalizer themed skin  801  that comprises a display of various frequency response controls  802 . According to some embodiments of the invention, a removable handle  803  adjusts the gain at a particular frequency when the user magnetically couples the handle  803  to the control component (not shown) corresponding to that frequency, and slides the handle  803  to a desired position. 
       FIG. 8B  illustrates a balance/fade themed skin  811  according to some embodiments of the invention. As shown, a number of boxes  812  are represented on an interface display  813 . The boxes  812  represent various speaker outputs for an exemplary audio system, i.e. sub-woofer, front left speaker, front right speaker, center speaker, rear left speaker, and rear right speaker. According to these embodiments, a user places a knob (not shown) on an individual box  812  to adjust the relative level of an attribute, i.e. volume, for an individual speaker corresponding to that box  812 . 
       FIG. 8C  illustrates a radio tuner themed skin  821  that displays tuner information  820 , such as a current radio station setting, and that also displays a virtual level dial  823  which indicates the determined position of an interface component  824 . 
     As will be understood by those familiar with the art, the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Likewise, the particular naming and division of the members, features, attributes, and other aspects are not mandatory or significant, and the mechanisms that implement the invention or its features may have different names, divisions and/or formats. Accordingly, the disclosure of the invention is intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following Claims.