Abstract: The present invention relates to a capacitive touch sensor including a plurality of horizontal sensor bars arranged in a single direction. The touch sensor preferably receives differential sensor signals from the sensor array to reduce proximity effects and noise associated with conventional capacitive touch sensors. The touch sensor also utilizes an isolation circuit or floating interface to reduce the effects of external interference and increase the accuracy of touch sensing and localization. The bars are preferably comprised of indium tin oxide oriented in the machine direction of roll for superior linearity. The touch sensor may be utilized with display screens having thick dielectrics and also eliminates the need for a rear guard layer.

Abstract: An enclosure system for an electronic device such as a capacitive touch screen system preferably includes a front cover coupled to a universal rear enclosure unit via a hinge. A pan located between the front cover and the universal rear enclosure unit is pivotably coupled to the front cover. The front cover houses a touch screen and a display between the pan and the front cover. The universal rear enclosure unit houses computer equipment and power electronics for use by the touch screen, and does not have to be individually sized based on the size of the touch screen. The enclosure system also includes a seal between the front cover and the touch screen plate and between the touch screen plate and the universal rear enclosure unit, which prevents moisture or other debris from entering the enclosure system.

Abstract: An enclosure system for an electronic device such as a capacitive touch screen system utilizes hinged doors to provide access to the various electronic components. The enclosure system preferably includes a front cover coupled to a rear enclosure via a hinge. A pan located between the front cover and the rear enclosure is pivotably coupled to the front cover. The front cover houses a touch screen and a display between the pan and the front cover. The rear enclosure houses computer equipment and power electronics for use by the touch screen. The front cover or bezel is releasably secured to the rear enclosure via a latch mechanism. The touch screen is accessible by swinging the front cover from the rear enclosure and opening the pan from the front cover.

Abstract: A graphic underlay for a capacitive touch screen system is positioned between the display and the touch screen. The positioning of the graphic underlay protects the graphic underlay from wear and prevents the graphic underlay from interfering with the touch sensing operation. The graphic underlay is held between a plastic retainer attached to a front bezel and the touch screen. The graphic underlay includes tabs for easing the placement and removal of the graphic underlay. The graphic underlay or graphic sheet includes visual indicia related to menus, controls, background, or other symbols for use in a touch screen system. The graphic underlay may be accessed by pivotally opening a front enclosure from a rear enclosure and pivotally opening a pan from the front enclosure.