TOUCHSCREEN
The invention relates to a projected capacitive touchscreen ( 1 ) having an image-generating layer ( 2 ), a sensor layer ( 3 ) and a touch layer ( 4 ) which has an external surface ( 5 ) and an internal surface ( 6 ). The sensor layer ( 3 ) is arranged on the side of the internal surface ( 6 ) of the touch layer ( 4 ) and, when the external surface ( 5 ) is touched with a touch organ ( 8 ), the touch ( 7 ) can be measured and evaluated by the sensor layer ( 3 ) through the thickness of the touch layer ( 4 ). At least one guide track ( 9 ) for the touch organ ( 8 ) is machined out of the touch layer ( 4 ) from the external surface ( 5 ) of the touch layer ( 4 ) in the region of the sensor layer ( 3 ) and the image-generating layer ( 2 ).
1 . A touchscreen ( 1 ) having an image-generating layer ( 2 ), a sensor layer ( 3 ) and a touch layer ( 4 ) which has an external surface ( 5 ) and an internal surface ( 6 ), wherein the sensor layer ( 3 ) is arranged on the side of the internal surface ( 6 ) of the touch layer ( 4 ) and wherein, when the external surface ( 5 ) is touched with a touch organ ( 8 ), the touch ( 7 ) can be measured and evaluated by the sensor layer ( 3 ) through the thickness of the touch layer ( 4 ), wherein, at least one guide track ( 9 ) for the touch organ ( 8 ) is machined out of the touch layer ( 4 ) from the external surface ( 5 ) of the touch layer ( 4 ) in the region of the sensor layer ( 3 ) and the image-generating layer ( 2 ).
2 . The touchscreen ( 1 ) according to claim 1 , wherein the guide track ( 9 ) has a width between 0.7 cm and 2 cm, preferably between 1 cm and 1.5 cm, and particularly preferably between 1.2 cm and 1.3 cm, and a maximum depth between 0.5 mm and 1 mm, preferably between 0.7 mm and 0.9 mm.
3 . The touchscreen ( 1 ) according to claim 1 , wherein the thickness of the touch layer ( 4 ) is 3 mm or more.
4 . The touchscreen ( 1 ) according to claim 1 , wherein the guide track ( 9 ) has a circular or oval progression, wherein the maximum outside diameter of the round or oval guide track ( 9 ) corresponds to the dimensions of a rotary dial which can be actuated with one or two fingers.
5 . The touchscreen ( 1 ) according to claim 1 , wherein a haptically tangible surface structure is arranged, at least in parts, in the guide track ( 9 ).
6 . The touchscreen ( 1 ) according to claim 1 , wherein the touch layer ( 4 ) is partially back-printed on its internal surface ( 6 ).
7 . An operating panel ( 10 ) for a machine controller, wherein the operating panel ( 10 ) has a touchscreen ( 1 ) according to claim 1 as a user interface.