1. An insulation blanket configured to be connected at an inside surface of an aircraft fuselage and to allow the passage of a structural element, comprising:
at least one opening that allows passage of the structural element; and
a sealing device configured to be installed as a single unit, the sealing device comprising first and second parallel rectilinear portions and including a core that is combined with a body that extends over a closed contour delimiting the at least one opening, the core having a spring action adapted to flatten the body against the through element over at least a part of a circumference of the opening.
2. The insulation blanket according to claim 1, wherein the core extends over the entire circumference of the opening.
3. The insulation blanket according to claim 2, wherein the core forms a loop whose profile is essentially identical to that of a cross-section of the through element.
4. The insulation blanket according to claim 2, wherein the core is a metal wire that is made of a piano-wire material.
5. The insulation blanket according to claim 4, wherein the wire has a sinusoidal profile over at least one portion to increase a pressure of contact on the through element.
6. The insulation blanket according to claim 1, wherein the core is made of a material with shape memory.
7. The insulation blanket according to claim 1, wherein the body is made from a silicone-based material that covers the core.
8. The insulation blanket according to claim 7, wherein the body comprises:
a part into which the core, that extends over the entire circumference of the opening, is inserted; and
a layer that extends on the periphery and outside of the part.
9. The insulation blanket according to claim 8, further comprising edges that overlap with the layer of the sealing device, whereby said edges and said layer are made integral with a peripheral junction line.
10. An aircraft fuselage that comprises the insulation blanket according to claim 1, wherein the through element is configured for holding the sealing device.
11. The aircraft fuselage according to claim 10, wherein the aircraft fuselage comprises a through element that comprises:
an edge that is oriented toward an outside of the aircraft, the edge being formed from an excess thickness on one face of the through element.
12. The aircraft fuselage according to claim 11, wherein the through element further comprises:
two base plates;
a yoke connecting the two base plates, the yoke comprising a through opening that forms an anchoring point; and
two excess thicknesses of the yoke, each offering an edge with a cylindrical portion that is centered relative to the opening.
13. The aircraft fuselage according to claim 12, wherein the core comprises:
the first and second parallel rectilinear portions of which the first rectilinear portion has a length that is approximately equal to or slightly less than a sum of thicknesses of the yoke and excess thicknesses and of which the second portion has a length that is approximately equal to or slightly less than the thickness of the yoke; and
two long sides that connect said two rectilinear portions, each side comprising two curved portions.
14. The aircraft fuselage according to claim 13, wherein the curved portions are arranged in planes that are perpendicular to the rectilinear portions and have curvature radii that are essentially identical to a cylindrical portion of the edge of the excess thicknesses, with the portions of the two long sides being arranged in parallel planes that are separated by a distance that is slightly less than or equal to the sum of the thicknesses of the yoke and the excess thicknesses, and with the portions of the two long sides being arranged in parallel planes that are separated by a distance that is slightly less than or equal to the thickness of the yoke.
15. The insulation blanket according to claim 3, wherein the core is a metal wire that is made of a piano-wire material.
16. The insulation blanket according to claim 2, wherein the core is made of a material with shape memory.
17. The insulation blanket according to claim 2, wherein the body is made from a silicone-based material that covers the core.
18. An insulation blanket configured to be connected at an inside surface of an aircraft fuselage, comprising:
at least one opening that allows passage of a fuselage structural element; and
a sealing device comprising a wire core that is combined with a body that extends over a closed contour delimiting the at least one opening, the core being a loop with a sinusoidal profile and having a spring action adapted to flatten the body against the fuselage structural element over at least a part of a circumference of the opening.
19. An aircraft fuselage comprising:
a fuselage structural element;
an insulation blanket having at least one opening that allows passage of the fuselage structural element; and
a sealing device comprising a wire core that is combined with a body that extends over a closed contour delimiting the at least one opening, the core being a loop with a sinusoidal profile and having a spring action adapted to flatten the body against the fuselage structural element over at least a part of a circumference of the opening,
wherein the fuselage structural element comprises:
two base plates;
a yoke connecting the two base plates, the yoke comprising a through opening that forms an anchoring point; and
two excess thicknesses of the yoke, each offering an edge with a cylindrical portion that is centered relative to the opening.
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 for driving a plasma display panel in which discharge cells are formed by first, second, and third electrodes, a frame is divided into a plurality of subfields each of which includes a reset period, an address period, and a sustain period, the method comprising:
in the reset period,
modifying a voltage at said first electrode from a first voltage to a second voltage;
floating said first electrode; and
gradually reducing the voltage at said first electrode to a third voltage.
2. The method of claim 1, further comprising, before modifying the voltage at said first electrode from the first voltage to the second voltage, gradually increasing the voltage at the first electrode from a fourth voltage to a fifth voltage.
3. The method of claim 2, wherein the first voltage substantially corresponds to the fifth voltage.
4. The method of claim 1, further comprising: alternately applying a sustain discharge voltage to said first electrode and said second electrode in a sustain period of a previous subfield, the first voltage corresponding to the sustain discharge voltage applied to said first electrode.
5. The method of claim 1, wherein the second voltage is lower than the sustain discharge voltage applied to said first electrode in the sustain period.
6. The method of claim 5, wherein the second voltage is a ground voltage.
7. A plasma display comprising:
a plasma display panel forming discharge cells between first, second, and third electrodes; and
a driving circuit including a reset period, an address period, and a sustain period, and applying driving signals to said first, second, and third electrodes, said driving circuit modifies a voltage at said first electrode from a first voltage to a second voltage, floats said first electrode, and gradually reduces the voltage at said first electrode to the third voltage in the reset period.
8. The plasma display of claim 7, wherein said driving circuit gradually increases the voltage at said first electrode from a fourth voltage to a fifth voltage in the reset period, and the fifth voltage corresponds to the first voltage.
9. The plasma display of claim 7, wherein said driving circuit alternately applies a sustain discharge voltage to said first electrode and said second electrode in the sustain period of a previous subfield, and the first voltage corresponds to the sustain discharge voltage.
10. The plasma display of claim 7, wherein the second voltage is lower than the sustain discharge voltage applied to said first electrode in the sustain period.
11. The plasma display of claim 8, wherein the second voltage is lower than the sustain discharge voltage applied to said first electrode in the sustain period.
12. The plasma display of claim 9, wherein the second voltage is lower than the sustain discharge voltage applied to said first electrode in the sustain period.
13. A method for driving a plasma display panel, comprising:
modifying a voltage at a first electrode from a first voltage to a second voltage during a reset period, with the reset period being when wall charges formed by a previous sustain discharge are erased, and wall charges are set up in order to perform a stable next address discharge, with at least said first electrode, a second electrode and a third electrode forming discharge cells;
floating said first electrode during the reset period; and
regularly step by step reducing the voltage at said first electrode to a third voltage during the reset period.
14. The method of claim 13, with the regular step by step reduction of the voltage at said first electrode to the third voltage during the reset period being a negative voltage applied to said first electrode during an initial period of a falling ramp period of the reset period in which no discharge is generated, the difference of the final voltages applied to said first and second electrodes being maintained at firing voltage, the voltage at said second electrode being further reduced as the negative voltage at said first electrode is further reduced.
15. The method of claim 13, with the floating of said first electrode being for a predetermined time during the reset period while voltage at said second electrode being maintained at a certain voltage, and a voltage waveform regularly reducing step by step being reduced to a certain negative voltage from the reference voltage is then applied to said first electrode.
16. The method of claim 13, further comprising a regular step by step rising of the voltage applied to said first electrode directly before the step by step reduction of the voltage at said first electrode and directly after a sustain period where a sustain discharge for displaying images on addressed cells is performed.
17. The method of claim 13, with the regular step by step rising of the voltage and the regular step by step reduction of the voltage being applied during a first reset period and only the regular step by step reduction of the voltage without the regular step by step rising of the voltage being applied in the next reset period.
18. The method of claim 13, further comprising:
before modifying the voltage at said first electrode from the first voltage to the second voltage, gradually increasing the voltage at the first electrode from a fourth voltage to a fifth voltage, the first voltage substantially corresponding to the fifth voltage; and
alternately applying a sustain discharge voltage to said first electrode and said second electrode in a sustain period of a previous subfield, the first voltage corresponding to the sustain discharge voltage applied to said first electrode, the second voltage being lower than the sustain discharge voltage applied to said first electrode in the sustain period, the second voltage being a ground voltage.