1. An input device comprising:
a first display for optical display of information;
at least a second display arranged above the first display for optical display of information; and
a touchscreen arranged above the second display for input of commands by touching an operating surface of the touchscreen.
2. An input device according to claim 1, wherein the operating surface is arranged on a side of the touchscreen facing away from the second display.
3. An input device according to claim 2, wherein the touchscreen is connected to the second display.
4. An input device according to claim 1, wherein the distance between the first display and the second display is variable.
5. An input device according to claim 1, wherein the second display is transparent, at least in a large region.
6. An input device according to claim 1, further comprising:
a control to drive the second display, so that an operating element or a warning message can be displayed by means of a second display.
7. An input device according to claim 6, wherein an explanation of the operating element or a context of the operating element can be displayed by the first display.
8. An input device according to claim 8, further comprising:
an actuator to move the touchscreen in at least one direction.
9. An input device according to claim 8, wherein the second display is moveable by means of the actuator.
10. An input device according to claim 9, wherein the touchscreen is connected to the second display.
11. An input device according to claim 1, wherein the distance between the first display and the second display is variable.
12. An input device according to claim 8, wherein the second display is transparent, at least in a large region.
13. An input device according to claim 8, further comprising:
a control to drive the actuator, so that the touchscreen can be moved for confirmation of touching of an operating surface of a touchscreen.
14. An input device according to claim 13, wherein the operating element can be displayed by the second display.
15. An input device according to claim 14, wherein an explanation of the operating element or a context of the operating element can be displayed by the first display.
16. An input device according to claim 1, wherein the input device is arranged in a vehicle.
17. A method for operation of an input device comprising a first display for optical display of information, at least a second display arranged above the first display for optical display of information, and a touchscreen arranged above the second display for input of commands by touching an operating surface of the touchscreen, the method comprising the step of:
displaying an operating element andor a warning message by the second display.
18. A method according to claim 17, the method further comprising:
displaying an explanation of the operating element or a context of the operating element by means of the first display.
19. A method according to claim 17, the method further comprising:
movement of the touchscreen to confirm touching of the operating surface of the touchscreen.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of treating a NOx sensor element for improving measurement characteristics thereof, said NOx sensor element including an electrochemical cell provided by forming, on a suitable solid electrolyte, a measuring electrode which is capable of reducing or decomposing a gas component having a bound oxygen in a measurement gas and which is formed of a cermet of a noble metal material and a ceramic material, said NOx sensor element being arranged to reduce or decompose said gas component by said measuring electrode and to measure an amount of oxygen generated upon reduction or decomposition of said gas component, for obtaining a concentration of said gas component in said measurement gas, said method comprising:
heating said NOx sensor element at a temperature of 600-1000\xb0 C. for 3-24 hours in a treatment atmosphere in which an oxygen concentration is regulated to be not higher than 0.2% and in which are included: (A) not lower than 1000 ppm of an adsorptive gas component wherein an adsorptive capable of being adsorbed on the measuring electrode is bound to oxygen; and (B) a combustible gas in an amount that can be substantially stoichiometrically oxidized by oxygen that is generated upon reduction or decomposition of said adsorptive gas component, so that said adsorptive gas component is reduced or decomposed for permitting said adsorptive in said adsorptive gas component to be adsorbed on said measuring electrode, and so that said noble metal material of said measuring electrode is reduced.
2. The method according to claim 1, wherein said adsorptive gas component is NO and said NO is included in said treatment atmosphere at a concentration in a range of 3000-7000 ppm.
3. The method according to claim 1, wherein said oxygen concentration in said treatment atmosphere is in a range of 10\u22128-0.1%.
4. The method according to claim 1, wherein said heating said NOx sensor element in said treatment atmosphere is carried out at a temperature of 750-900\xb0 C. for 4-6 hours.
5. The method according to claim 1, wherein said combustible gas is a hydrocarbon gas.