Abstract:
A location sensitive touch panel for use on a rigid substrate. The substrate carries a first set of conductive strips. A resilient plastic membrane overlaying it carries a second set of conductive strips orthogonal to and spaced from the first set. Finger pressure can cause electrical contact between any one of the first set of strips and any one of the second set of strips. The substrate may be either flat or curved, with the membrane conforming to its contour.
Abstract:
A transparent conductive film includes: a transparent film substrate; a transparent conductor layer provided on one or both sides of the transparent film substrate; and at least one undercoat layer interposed between the transparent film substrate and the transparent conductor layer; wherein: the transparent conductor layer is patterned; and a non-patterned portion not having the transparent conductor layer has the at least one undercoat layer.
Abstract:
An illuminated membrane switch employs transparent conductive elements in the region of the button so as to provide passage of light from behind the membrane switch to the user without shadowing by opaque conductive elements.
Abstract:
In a method of manufacturing a substrate having a transparent conductive film in which sputtering is carried out on a transparent insulating substrate using an indium oxide/tin oxide target under an atmosphere of a mixed gas containing argon and oxygen, when the ratio of oxygen to argon in the mixed gas is in a suitable range of 0.016 to 0.018, the carrier density of the transparent conductive film becomes a maximum, while the mobility rises progressively as the ratio of oxygen to argon increases. The surface resistance of the transparent conductive film, that is the reciprocal of the product of the carrier density and the mobility, 1/(carrier density×mobility), takes a minimum value when the ratio of oxygen to argon is in the above suitable range. In this case, crystallization of the film is promoted and the percentage change between the surface resistance of the film before heat treatment and the surface resistance of the film after heat treatment can be kept down to within ±10%.
Abstract:
In a method of manufacturing a substrate having a transparent conductive film in which sputtering is carried out on a transparent insulating substrate using an indium oxide/tin oxide target under an atmosphere of a mixed gas containing argon and oxygen, when the ratio of oxygen to argon in the mixed gas is in a suitable range of 0.016 to 0.018, the carrier density of the transparent conductive film becomes a maximum, while the mobility rises progressively as the ratio of oxygen to argon increases. The surface resistance of the transparent conductive film, that is the reciprocal of the product of the carrier density and the mobility, 1/(carrier densitynullmobility), takes a minimum value when the ratio of oxygen to argon is in the above suitable range. In this case, crystallization of the film is promoted and the percentage change between the surface resistance of the film before heat treatment and the surface resistance of the film after heat treatment can be kept down to within null10%.
Abstract:
A membrane switch (10) is disclosed having a bottom membrane (12) with an upper conductive surface (16), a top membrane (14) with a lower conductive surface (18), and an intermediate spacer (20) disposed therebetween. The intermediate spacer includes a central aperture (24) and is formed of an intermediate substrate (21) having a lower surface (26) and an upper surface (28). First y-axis electrodes (30A, 30B) including first contact portions (31A, 31B) and second x-axis electrodes (34A, 34B) including second contact portions (38A, 38B) are both formed on the upper surface of the intermediate substrate. The intermediate spacer further includes an upper adhesive layer (45) including predefined first apertures (50) adapted to overlie the first contact portions of the y-axis electrodes and predefined second apertures (47) adapted to overlie the second contact portions of the x-axis electrodes, and a lower adhesive layer (43). Preferably after the intermediate spacer is assembled, at least one hole (39) is defined through each of the first contact portions, extending through the intermediate substrate and the lower adhesive layer. Then conductive epoxy material (41) is poured into the first aperture and the hole so as to provide an electrical conduction path between the first contact portion of the y-axis electrode and the lower adhesive layer. Similarly, conductive epoxy material is poured into the second aperture predefined through the upper adhesive layer so as to provide an electrical conduction path between the second contact portion of the x-axis electrode and the upper adhesive layer. When the intermediate spacer thus constructed is secured between the bottom and top membranes, the y-axis and x-axis electrodes are in electrical contact with the bottom and top membranes, respectively.
Abstract:
Analog resistance touch switches and matrix type touch switches have contacts coated with a very thin film, which in use does not form an appreciable amount of an insulating oxide, to inhibit changes in contact resistance and extend operating life.
Abstract:
An input structure for a display device having opposed substrates an electrodes disposed on the inner surfaces of the substrates and a seal about the periphery thereof with a relay electrode crossing the seal to connect the electrodes on the opposed substrate to external circuitry. The electrical connection between the electrodes on the first substrate to the relay electrode is provided by a conductive adhesive electrode and a conductive synthetic resin thin film layer contacting the conductive adhesive electrode, the thin film layer formed of conductive material which is shorter than the conductive material of the conductive adhesive electrode to absorb shock and avoid separation of the electrodes from the opposed substrate.
Abstract:
An environmentally protected keyboard display and input device is provided which may be utilized in conjunction with a variety of digital control systems such as automated bank tellers or building security systems. The keyboard display and input device includes a unitary, transparent flexible keyboard having thickened portions forming keys. The keyboard forms an environmental seal including a peripheral gasket to protect an underlying, transparent, pressure sensitive switching assembly, which, in turn, overlies a corresponding visual display of alphanumeric characters which indicate the significance of the individual pressure sensitive switches and corresponding keys overlying each character. Pins are formed on the underside of the flexible keyboard, below each key, to focus and concentrate pressure exerted on each key to the corresponding pressure sensitive switch below. An optical grid is provided to restrict the viewing of the alphanumeric characters to the user of the device, to prevent compromising the data input.
Abstract:
An input element which comprises a pair of transparent substrates, of which at least one is flexible, each having electrodes of transparent electroconductive film on its surface, being arranged in confrontation with the surface provided with the electrodes facing each other with a space therebetween, and a first spacer being arranged at the peripheral portions of the pair of substrates to hold the space, wherein a reflective convex second spacers in dot are provided on the lower substrate all over the inside surface of the element.