1. Wing (10) having a negative dihedron for towing a load, comprising a flexible canopy (12) which is defined between two lateral ends (14A, 14B) which are connected to each other, at the front, by a leading edge (20) and, at the rear, by a trailing edge (22), the canopy (12) having, between those two lateral ends (14A, 14B), a propulsive central region (16) bordered at each of its lateral sides by a respective control regions (18A, 18B), the wing comprising at least a member (30A, 30B) for suspending the load adjacent to each lateral end (14A, 14B), said auxiliary maintenance means (32) which are capable of flattening the propulsive central region (16), said auxiliary maintenance means being located adjacent to the leading edge (20) during flight,\u2014wherein the trailing edge (22) of the wing is generally concave when viewed from above.
2. Wing according to claim 1, wherein the central region (60) is not provided, except for adjacent to the leading edge (20), with any auxiliary maintenance means which is capable of flattening the propulsive central region (16) during flight.
3. Wing according to claim 1, wherein the aspect ratio of the wing is greater than 3.
4. Wing according to any claim 1, wherein the thrust centre of each section of the control regions (18A, 18B) is behind the thrust centre of each section of the propulsive central region (16).
5. Wing according to claim 1, wherein the auxiliary maintenance means (32) of the propulsive central region (16) comprise at least a line (34A, 34B) which is connected by one end to the propulsive central region (16) adjacent to the leading edge (20) and which is capable of being connected to the load at the other end thereof.
6. Wing according to claim 5, wherein each line (34A, 34B) comprises an assembly of shroud lines (36A, 34B) which are gathered at one end at the load to be towed and the other ends of which are connected to the propulsive central region (16), being distributed over the length of the leading edge (20).
7. Wing according to claim 1, wherein the auxiliary maintenance means (32) of the propulsive central region (16) adjacent to the leading edge (20) comprise a stiffening spar which is fixedly joined over the leading edge (20).
8. Wing according to claim 1, wherein the line (C) of the thrust centres of the sections of the canopy (12) during flight, from one lateral end to the other (14A, 14B), describes the shape of a curve whose centre of curvature, at any location, is located at the side of the trailing edge (22).
9. Wing according to claim 1, further comprising rear lines (40A, 40B) which are connected to the suspension members (30A, 30B) which are arranged at the lateral ends (14A, 14B) of the wing, and at least a shroud line (80A, 80B) which is connected, at one end, to the leading edge (20) and, at the other end thereof, to at least one of the rear lines (40A, 40B).
10. Wing according to claim 1, further comprising rear lines (40A, 40B) which are connected to the suspension members (30A, 30B) which are arranged at the lateral ends (14A, 14B) of the wing, and wherein the auxiliary maintenance means (32) of the propulsive central region (16) comprise at least a front line (34A, 34B) which is connected by one end to the propulsive central region adjacent to the leading edge (20) and which is capable of being connected to the load at the other end thereof, each front line (34A, 34B) comprising an assembly of shroud lines (36A, 36B; 90A, 90B) which are applied to the propulsive central region (16) at locations which are distributed over the length of the leading edge (20), at least one sliding shroud line (90A, 90B) being engaged in a sliding manner in a guide (92A, 92B) which is fixedly joined to the leading edge (20), the end of the sliding shroud line (90A, 90B) being fixedly joined to at least one of the rear lines (40A, 40B).
11. Wing according to claim 9, wherein the guide (92A, 92B) is supported in a sliding manner on a deformable loop (96A, 96B) which is connected at two locations which are spaced from the leading edge (20).
12. Wing according to claim 1, further comprising an operating device (100) which comprises a control bar (102), the ends of which are connected to the lateral ends (14A, 14B) of the canopy (12) by rear lines (40A, 40B) and at least a towing line (104) which is connected to the canopy (12) in front of the rear lines (40A, 40B) by at least a front line (34A, 34B), which towing line (104) comprises means for connection to the body of a user during use of the wing, which connection means comprise at least a pulley (110) which is engaged in a loop of each towing line (104) whose end is fixedly joined to the control bar (102), the pulley (110) comprising means (112,114,116) for connecting the axle thereof to the body of the user.
13. Wing according to claim 12, wherein the means for connecting the axle of the pulley (110) to the body of the user comprise a complementary pulley (114) which is engaged in a loop of a return strand (112), one end of which is fixed to the axle of the pulley (110) and the other end of which is fixed to the or each towing line (104), the complementary pulley (114) comprising means (116) for connecting the axle thereof to the body of the user.
14. Wing according to claim 1, wherein, in longitudinal section, the canopy (12) is concave.
15. Wing according to claim 1, wherein the auxiliary maintenance means (32) are arranged only between the leading edge (20) and the line (C) of the thrust centres of the canopy.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-12. (canceled)
13. A method for providing a main 3D content and a supplementary content used in a 3D multimedia device, comprising:
displaying the main 3D content; and
triggering the supplementary content by a 3D related event of the main 3D content, wherein, depth value of the supplementary content is updated along with depth value change of the main 3D content.
14. The method according to claim 13, wherein the 3D related event is compared to predetermined trigger conditions, for triggering the supplementary content when the predetermined trigger conditions are occurred in the main 3D content.
15. The method according to claim 13, wherein the 3D related event of the main 3D content is part of a group comprising a depth value of the main 3D content, a 3D position, a 3D posture and a 3D scale of an object or a region of the main 3D content.
16. The method according to claim 13, further comprising displaying the supplementary content together with the main 3D content or separately from the main 3D content.
17. The method according to claim 13, wherein the supplementary content is a collection of multimedia data including graphics, text, audio andor video, and 3D image.
18. The method according to the claim 13, wherein, the main 3D content comprises an object interesting for user, the depth value of the supplementary content is updated to make the supplementary content stick to the object in the main 3D content.
19. A 3D multimedia device for providing a main 3D content and a supplementary content, comprising:
a 3D display for displaying the main 3D content;
a user terminal for triggering the display of the supplementary content by a 3D related event of the main 3D content; and
an updater for updating depth value of the supplementary content along with depth value change of the main 3D content.
20. The 3D multimedia device according to claim 19, further comprising an event trigger list module for storing the 3D related event triggers including a depth value of the main 3D content, a 3D position, a 3D posture and a 3D scale of an object or a region of the main 3D content.
21. The 3D multimedia device according to claim 19, further comprising an event engine for checking the event triggers, comparing the 3D related event to predetermined trigger conditions, and searching the associated supplementary content to be displayed when the predetermined trigger conditions are occurred in the main 3D content.
22. The 3D multimedia device according to the claim 19, wherein, the main 3D content comprises an object interesting for user, the updater updates the depth value of the supplementary content to make the supplementary content stick to the object in the main 3D content.