A TFT liquid crystal display (LC display) with a multi-layer structure, comprising: - a first glass substrate, above - a first electrode structure comprising a plurality of pixel electrodes and applied to the first glass substrate, - a liquid crystal filling, which is arranged over the first electrode structure, - a second second substrate arranged over the liquid crystal filling, on the underside of which a second electrode structure is arranged, which is formed as a large-area electrode (VCOM) and acts as a counter-electrode for the plurality of pixel electrodes, wherein for operating the TFT-LC display a square-wave voltage is applied to the second electrode structure, - a first and second polarizer layer (2, 8), each arranged on opposite sides of the multilayer structure, the polarization axes of which are oriented perpendicularly to one another, and a light source arranged below the multi-layer structure; characterized in that the TFT LC display is equipped with a sensor device for contactless detection of a user's finger or hand in a region disposed in front of the TFT LC display, wherein the sensor device comprises a plurality of edge electrodes which function as measurement electrodes and which are arranged in an edge region adjacent to the second electrode structure, - wherein the second electrode structure acts as a field preparation electrode of this sensor device and the electrical field generated by means of this field preparation electrode is measured by the measurement electrodes of the sensor device as voltage levels, which are influenced by the spatial position of the finger or the hand, wherein a position determination from signals tapped by the measurement electrodes is determined by triangulation. - a first glass substrate, above - a first electrode structure comprising a plurality of pixel electrodes and applied to the first glass substrate, - a liquid crystal filling, which is arranged over the first electrode structure, - a second second substrate arranged over the liquid crystal filling, on the underside of which a second electrode structure is arranged, which is formed as a large-area electrode (VCOM) and acts as a counter-electrode for the plurality of pixel electrodes, wherein for operating the TFT-LC display a square-wave voltage is applied to the second electrode structure, - a first and second polarizer layer (2, 8), each arranged on opposite sides of the multilayer structure, the polarization axes of which are oriented perpendicularly to one another, and a light source arranged below the multi-layer structure; characterized in that the TFT LC display is equipped with a sensor device for contactless detection of a user's finger or hand in a region disposed in front of the TFT LC display, wherein the sensor device comprises a plurality of edge electrodes which function as measurement electrodes and which are arranged in an edge region adjacent to the second electrode structure, a light source arranged below the multi-layer structure; characterized in that the TFT LC display is equipped with a sensor device for contactless detection of a user's finger or hand in a region disposed in front of the TFT LC display, wherein the sensor device comprises a plurality of edge electrodes which function as measurement electrodes and which are arranged in an edge region adjacent to the second electrode structure, - wherein the second electrode structure acts as a field preparation electrode of this sensor device and the electrical field generated by means of this field preparation electrode is measured by the measurement electrodes of the sensor device as voltage levels, which are influenced by the spatial position of the finger or the hand, wherein a position determination from signals tapped by the measurement electrodes is determined by triangulation.