Thin film display element

1. A thin film display element with a display region, extending substantially along a base plane defining a lateral extension of the display element, and having at least one emissive area in the display region, the display element having a layer structure comprising:

a first patterned conductor layer comprising a first display electrode in the display region, connected to the outside of the display region via a first display conductor trace;

a second patterned conductor layer comprising a second display electrode in the display region, connected to the outside of the display region via a second display conductor trace; and

an emissive layer between the first and the second conductor layers configured to emit light in the at least one emissive area upon electrical voltage coupled over the emissive layer in the at least one emissive area between the first and the second conductor layers;

the first and the second display electrodes at least partly laterally overlapping each other in an overlapping area, the at least one emissive area being defined by the overlapping area;

the first or the second patterned conductor layer further comprising a first touch electrode in the display region, and the first or the second patterned conductor layer further comprising a second touch electrode in the display region, laterally separated from the first touch electrode, the first and the second touch electrodes being connected to the outside of the display region via a first and a second touch conductor trace, respectively, the first and the second touch electrodes forming a touch sensor for capacitive touch or proximity sensing; and for each of the first and the second touch electrodes formed in one of the patterned conductive layers, the other patterned conductive layer comprising, at the location of the touch electrode, a passive touch region galvanically isolated from the outside of the display region.

2. A thin film display element as defined in claim 1 , wherein the passive touch region comprises a passive touch conductor pattern separated from the other conductor pattern(s) of said other patterned conductor layer by an isolation gap.

3. A thin film display element as defined in claim 1 , wherein the passive touch region comprises an opening in said other patterned conductor layer.

4. A thin film display element as defined in claim 1 , wherein at least one of the electrodes of the touch sensor encircles more than half, preferably at least 80% of the perimeter of the at least one emissive area.

5. A thin film display element as defined in claim 4 , wherein the at least one emissive area has a maximum width in the range of 2 to 7 mm, preferably in the range of 3 to 6 mm, for example, about 4 or 5 mm.

6. A thin film display element as defined in claim 1 , comprising a plurality of emissive areas.

7. A thin film display element as defined in claim 1 , wherein a projection of the second touch electrode on the base plate encircles more than half of a projection of the perimeter of the first touch electrode on the base plate.

8. A thin film display element as defined in claim 1 , implemented as a segment type display element.

9. A thin film display element as defined in claim 1 , implemented as a thin film electroluminescent TFEL display element.

10. A thin film display element as defined in claim 9 , implemented as an inorganic thin film electroluminescent TFEL display element.

11. A thin film display element as defined in claim 9 , implemented as a thin film organic light emitting diode OLED display element.