fig1 illustrates a user interface 10 of a piece of exercise equipment , namely , a treadmill ( not shown ), embodying the present invention . user interface 10 includes a display 12 and a control panel 14 . control panel 14 is a substrate including a plurality of touch surfaces , such as display control touch surfaces 16 which control various functions of display 12 , touch surfaces 18 for numerical input , touch surface 20 for resetting the treadmill &# 39 ; s controls , touch surfaces 22 for adjusting the inclination of the treadmill &# 39 ; s running surface , touch surface 24 for starting the treadmill , touch surfaces 26 for adjusting the treadmill &# 39 ; s resistance , and touch surface 28 for indicating that data is to be entered to the treadmill &# 39 ; s control system . control panel 14 , as shown in fig1 , is generally planar . in other embodiments , control panel 14 can take any desired curved or angular shape . for example , control panel 14 can include convex , concave , and or angular elements . the front surface 30 of control panel 14 generally conforms to the contour of control panel 14 . that is , in the fig1 embodiment , control panel 14 is generally planar and front surface 30 thereof also is generally planar . touch surfaces 18 are generally co - planar with front surface 30 . however , portions of control panel 14 , namely , touch surfaces 16 , 20 , 22 , 26 , and 28 are recessed from front surface 30 . another portion of control panel 14 , namely , touch surface 24 , is raised above front surface 30 . these features , which are more easily seen with reference to fig2 and 3 , make it easier for a user to locate a particular touch surface through tactile means , in addition to or instead of visual means . further , the switches or sensors ( discussed further below ) associated with raised touch surfaces , such as touch surface 24 , are less likely to be adversely affected by contaminants ( especially liquid contaminants ) because it is difficult , if not impossible , for contaminants to pool or settle about a raised surface . the raised and recessed portions of front surface 30 can be achieved in various ways . for example , fig2 shows an embodiment wherein control panel 14 has multiple thicknesses . in this embodiment , control panel 14 generally has a first thickness 34 between front surface 30 and rear surface 36 ( which is generally planar ). control panel 14 also has a second , reduced thickness 32 in the regions corresponding to , for example , touch surfaces 20 , 22 , 26 , and 28 . control panel 14 further has a third , greater thickness 33 in the region corresponding to touch surface 24 . fig3 shows an alternate embodiment wherein control panel 14 has a substantially uniform thickness 38 , and wherein rear surface 36 generally conforms to front surface 30 . other embodiments can use any combination of the foregoing techniques or any other suitable technique . fig4 illustrates a sensor panel 50 attached to the control panel 14 embodiment illustrated in fig2 . sensor panel 50 includes touch switches 40 , 42 , 44 , 46 , and 48 formed onto substrate 52 . each touch switch 40 , 42 , 44 , 46 , and 48 is connected to a control system , control interface or control logic ( not shown ). substrate 52 is generally planar and generally conforms to rear surface 36 of control panel 14 . in alternate embodiments , substrate 52 can be convex , concave , or take other shapes so as to be substantially conformable to rear surface 36 . substrate 52 is positioned relative to control panel 14 so that touch switches 40 , 42 , 44 , 46 , and 48 are aligned with corresponding touch surfaces 20 , 22 , 24 , 26 , and 28 . in the fig4 embodiment , properly aligned substrate 52 is bonded to rear surface 36 of control panel 14 using an appropriate adhesive . in other embodiments , substrate 52 can be connected to rear surface 36 of control panel 14 by any other suitable means , such as mechanical fasteners . however , it is preferred that the attachment mechanism does not require perforation of control panel 14 . fig5 illustrates sensor panel 50 attached to the control panel 14 embodiment illustrated in fig3 . in this embodiment , substrate 52 generally conforms to the portions of rear surface 36 adjacent touch surfaces 20 , 22 , 26 , and 28 , i . e ., the “ high points ” of rear surface 36 . as in the fig4 embodiment , substrate 52 is positioned relative to control panel 14 so that touch switches 40 , 42 , 44 , 46 , and 48 are aligned with corresponding touch surfaces 20 , 22 , 24 , 26 , and 28 . properly aligned substrate 52 preferably is bonded to rear surface 36 of control panel 14 using an appropriate adhesive . in other embodiments , substrate 52 can be connected to rear surface 36 of control panel 14 by any other suitable means , such as mechanical fasteners . however , it is preferred that the attachment mechanism does not require perforation of control panel 14 . fig6 shows a cross - sectional view of a curved control panel 100 embodying the present invention . control panel 100 includes a number of touch surfaces 102 . a switch panel 106 including a number of touch switches 104 on a substrate 108 is bonded to control panel 100 using a suitable adhesive 110 . control panel 100 generally has a first thickness 112 , and it has a second , reduced thickness 114 in the regions adjacent touch surfaces 102 . alternatively , one or more regions of control panel 100 corresponding to one or more raised touch surfaces ( not shown ) could have increased thickness ( not shown ). in operation , each touch switch , for example , touch switch 40 , sets up an electric field 60 in the proximity thereof . the introduction of a stimulus , for example , a user &# 39 ; s finger ( not shown ), in the proximity of the electric field causes touch switch 40 to functionally change state and provide a corresponding input to an associated control system , control interface or control logic ( not shown ). this phenomenon is discussed more thoroughly in the foregoing u . s . patents incorporated herein by reference . for example , if a user desired to start the treadmill whose control panel is shown in fig1 , the user would touch or bring his / her finger close to touch surface 24 . this action would disturb the electric field set up by corresponding touch switch 44 . in response , touch switch 44 would provide an output signal to the treadmill &# 39 ; s control logic ( not shown ), which in turn would cause the treadmill to start . the present invention allows integration of an electrical switching mechanism into an existing or custom - fabricated , functional and / or decorative panel , without the need to perforate the panel , as would be the case if conventional mechanical and / or membrane switches were to be used . for example , the decorative front panel of a vending machine or beverage dispenser ( not shown ) can be adapted for use as a control panel simply by defining touch surfaces at any desired location on the front of the decorative panel and providing associated touch switches at corresponding locations on the rear of the decorative panel , as described above . this allows for a novel and elegant solution to the problem of providing aesthetic and ergonomic control system input devices for all sorts of equipment . the present invention thus has been described in terms of certain preferred embodiments . these embodiments are not to be construed as limiting the present invention , whose scope is defined by the claims appended hereto .
a control system interface integrates an electronic switching or sensing mechanism with an existing or custom - fabricated , functional or decorative equipment panel . the electronic switching or sensing mechanism is located on the rear surface of the equipment panel and a corresponding touch surface is defined on the front surface of the equipment panel . the electronic switching or sensing mechanism is responsive to a stimulus in the proximity of the touch surface , and it provides a control signal to a control system when it senses such a stimulus .