Power supply for an electric window dimming device

1. An electric window dimming device for reducing the transparency of a window for an aircraft, the electric window dimming device comprising:

a capacitance; and

a control unit;

wherein the electric window dimming device is adapted for being connected to the capacitance;

wherein the electric window dimming device is adapted for being connected to a primary energy source;

wherein the capacitance is adapted for providing energy for the window dimming device in case of failure of the primary energy source;

wherein the electric window device has a first state and a second state;

wherein the first state provides the transmission of optical light waves;

wherein the second state reduces the transmission of optical light waves;

wherein the control unit is adapted for setting the electric window dimming device to the first state in case of failure of the primary energy source in order to transmit optical light waves.

2. The electric window dimming device of claim 1 ,

wherein the control unit comprises a first interface and a second interface;

wherein the control unit is adapted for being connected to the primary energy source by the first interface;

wherein the control unit is adapted for being connected to the capacitance by the second interface; and

wherein the control unit is adapted for controlling the electric window dimming device.

3. The electric window dimming device of claim 1 , wherein the capacitance comprises a third interface;

wherein the capacitance is adapted for being connected to the primary energy source by the third interface.

4. The electric window dimming device of claim 3 , wherein the capacitance is adapted for being charged by the primary energy source.

5. The electric window dimming device of claim 2 , further comprising a drive unit for actuating the electric window dimming device,

wherein the drive unit is adapted for being controlled by the control unit.

6. The electric window dimming device of claim 1 , wherein the primary energy source is selected from the group consisting of networks, onboard networks, generators and power supply systems.

7. The electric window dimming device of claim 1 , wherein the capacitance is a capacitor.

8. A window unit for an aircraft, the window unit comprising:

a window; and

an electric window dimming device for reducing the transparency of a window for an aircraft, the electric window dimming device comprising:

a capacitance; and

a control unit;

wherein the electric window dimming device is adapted for being connected to the capacitance;

wherein the electric window dimming device is adapted for being connected to a primary energy source;

wherein the capacitance is adapted for providing energy for the window dimming device in case of failure of the primary energy source;

wherein the electric window dimming device has a first state and a second state;

wherein the first state provides the transmission of optical light waves;

wherein the second state reduces the transmission of optical waves;

wherein the control unit is adapted for setting the electric window dimming device to the first state in case of failure of the primary energy source in order to transmit optical light waves;

wherein the electric window dimming device is adapted for regulating the light transmission of a window.

9. A method for controlling an electric window dimming device, comprising:

connecting the electric window dimming device to a primary energy source; and

connecting the electric window dimming device to a capacitance;

wherein the electric window dimming device has a first state and a second state;

wherein the first state provides the transmission of optical light waves;

wherein the second state reduces the transmission of optical waves;

wherein the capacitance provides energy for the window dimming device in case of failure of the primary energy source in order to set the electric window dimming device to a first state in which optical light waves are transmitted.

10. The method of claim 9 , further comprising:

connecting a control unit to the primary energy source by a first interface; and

connecting the control unit to the capacitance by a second interface;

controlling the electric window dimming device by the control unit.

11. The method of claim 9 , further comprising:

connecting the capacitance to the primary energy source by a third interface.

12. The method of claim 11 , further comprising:

charging the capacitance with the primary energy source.

13. The method of claim 9 , further comprising:

adjusting a state of the dimming device that allows the transmission of optical light waves in case of failure of the primary energy source.

14. An aircraft with an electric window dimming device for reducing the light transmission of a window, the electric window dimming device comprising:

a capacitance;

a control unit;

wherein the electric window dimming device is adapted for being connected to the capacitance;

wherein the electric window dimming device is adapted for being connected to a primary energy source;

wherein the capacitance is adapted for providing energy for the window dimming device in case of failure of the primary energy source;

wherein the electric window dimming device has a first state and a second state;

wherein the first state provides the transmission of optical light waves;

wherein the second state reduces the transmission of optical light waves;

wherein the control unit is adapted for setting the electric window dimming device to the first state in case of failure of the primary energy source in order to transmit optical light waves.