초록 ▼

The invention is directed to an X-Y co-ordinate detection system of the type which generates intersecting paths of radiation across a surface which may be, for example, a touch panel of the cathode ray tube type. Less expensive and more reliable operation is provided by developing the paths of radia

The invention is directed to an X-Y co-ordinate detection system of the type which generates intersecting paths of radiation across a surface which may be, for example, a touch panel of the cathode ray tube type. Less expensive and more reliable operation is provided by developing the paths of radiation by use of radiation-emissive material disposed near at least one edge of the surface and excited by a flying spot of energy, such as an electron beam. In the preferred embodiment, strips of infrared emissive material are disposed on an internal surface of a cathode ray tube\s panel and excited by overscanning the tube\s electron beam to develop intersecting paths of infrared radiation across the tube\s faceplate.

대표청구항 ▼

In an X-Y co-ordinate detection system having a display surface for providing a visual display image when excited and across which to develop X-Y co-ordinates, and having means for providing intersecting paths of radiation across the display surface, the improvement comprising: means including radia

In an X-Y co-ordinate detection system having a display surface for providing a visual display image when excited and across which to develop X-Y co-ordinates, and having means for providing intersecting paths of radiation across the display surface, the improvement comprising: means including radiation-emissive material located near at least one edge of the display surface for developing, when excited, paths of radiation across said surface; and means for developing a flying spot of energy for exciting both the display surface for providing the visual display image and the radiation-emissive material for providing the intersecting paths of radiation across the display surface.