WO2005020187A1 - 車載情報端末 - Google Patents
車載情報端末 Download PDFInfo
- Publication number
- WO2005020187A1 WO2005020187A1 PCT/JP2004/012167 JP2004012167W WO2005020187A1 WO 2005020187 A1 WO2005020187 A1 WO 2005020187A1 JP 2004012167 W JP2004012167 W JP 2004012167W WO 2005020187 A1 WO2005020187 A1 WO 2005020187A1
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- WO
- WIPO (PCT)
- Prior art keywords
- map
- current location
- route
- enlarged map
- guidance intersection
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3667—Display of a road map
- G01C21/367—Details, e.g. road map scale, orientation, zooming, illumination, level of detail, scrolling of road map or positioning of current position marker
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
- G09B29/10—Map spot or coordinate position indicators; Map reading aids
Definitions
- the present invention relates to an in-vehicle information terminal that displays a simplified map based on map data.
- a road shape is simplified by performing processing such as linearization or orthogonalization in a predetermined range around a route connecting a start position and a target position. Therefore, even in the simplified map, the positional relationship on the map between the two points is generally maintained.
- the simplified map using the device disclosed in Patent Document 1 is not suitable for displaying the approximate distance between two points and the road intersecting along the way. There is.
- An in-vehicle information terminal includes a current position detecting unit that detects the current position of the own vehicle, a route setting unit that sets a route from the current position of the own vehicle detected by the current position detecting unit to the destination, and a route.
- a display control unit that displays an enlarged map near the next guidance intersection on the route set by the setting unit on the display device, and the display control unit displays the current location and the next planned intersection on one screen of the display device The enlarged map is displayed on the screen by displaying the route in a straight line and representing the route between them in a straight line.
- the display control unit displays the road intersecting the route from the current location to the next guidance intersection, in a straight line, by intersecting the route expressed in a straight line as described above. Is preferred.
- the display control unit of the on-vehicle information terminal selectively displays any one of a plurality of roads intersecting a route from the current position to the next guidance intersection based on the road type.
- the display control unit of the above-mentioned in-vehicle information terminal extracts a road having the highest road type among a plurality of roads intersecting the route from the current position to the next guidance intersection, and extracts the road. If there are multiple roads, it is preferable to select and display only the road closest to the current location.
- the display control unit may display a river or a railway crossing the route from the current location to the next guidance intersection by crossing the straight route as described above. Les ,.
- the display control unit displays the distance from the current position to the road, J11 or the railway displayed as described above.
- the display control unit when displaying a road, river, or railroad by crossing the straight-line route as described above, changes the display position of the intersection from the current position to the next position. It is preferable to change the distance according to the ratio of the distance to the guidance intersection and the distance from the current location to the intersection.
- An in-vehicle information terminal includes a current position detection unit that detects the current position of the own vehicle, a route setting unit that sets a route from the current position of the own vehicle detected by the current position detection unit to the destination.
- a display control unit for displaying an enlarged map near the next guidance intersection on the route set by the route setting unit on a display device, and the enlarged map has a plurality of display forms. This is to switch between multiple display modes of the enlarged map and display them on the screen.
- the display control unit switches a plurality of display forms of the enlarged map according to a distance from the current location to a next guidance intersection.
- the display control unit may switch a plurality of display modes of the enlarged map according to a result of a selection made by the user.
- the display control unit displays a simple enlarged map on the screen and displays the map from the current location to the next guidance intersection. If the distance is equal to or greater than the first threshold and smaller than the second threshold, a linear enlarged map is displayed on the screen, and the distance from the current location to the next guidance intersection is determined by the second threshold. If the value is equal to or more than the value, an arbitrary enlarged map can be displayed on the screen. In the above-described in-vehicle information terminal, when displaying the linear enlarged map on the screen, the display control unit determines the current location and the next guidance intersection.
- the current location and the next guidance intersection are fixedly displayed on the screen by the display control unit, and the route between them is represented in a straight line. Because of this, an enlarged map of the route from the current location to the next guidance intersection can be displayed in an easy-to-read manner, and this enlarged map can provide a simplified map suitable for an in-vehicle information terminal.
- the enlarged map has a plurality of display modes, which are switched and displayed on the screen by the display control unit. In this way, an enlarged map of the route from the current location to the next guidance intersection can be displayed according to the situation at that time.
- FIG. 3 is an explanatory view of a deformation process (1) used when creating a summary map.
- FIG. 4 is an explanatory diagram of a deforming process (2).
- FIG. 5 is a diagram showing a flowchart of an enlarged map display process when an enlarged map up to a guidance intersection is displayed on a screen.
- FIG. 6 is a diagram showing a flowchart of a simple enlarged map display process.
- FIG. 7 is a view showing a flowchart of a straight-line enlarged map display process.
- FIG. 8 is a view showing a flowchart of an arbitrary enlarged map display process.
- FIG. 9 is a diagram showing a state in which the present invention is applied to a communication navigation system.
- FIG. 10 is a diagram showing a state in which the present invention is applied to a personal computer.
- the control circuit 11 includes a microprocessor and its peripheral circuits, and performs various processes and controls by executing a control program stored in the ROM 12 using the RAM 13 as a work area.
- the control circuit 11 performs an enlarged map display process described later, and displays an enlarged map near the next guidance intersection on the display monitor 16 based on the map data recorded on the DVD-ROM 19. .
- the current position detection device 14 is a device that detects the current position of the own vehicle. For example, a vibration gyro 14a that detects the traveling direction of the own vehicle, a vehicle speed sensor 14b that detects the vehicle speed, a GPS satellite It consists of a GPS sensor 14c that detects GPS signals from stars.
- the navigation device 1 determines the display range of the map, the route search start point, and the like based on the current position of the vehicle detected by the current position detection device 14, and displays the current position on the map.
- the image memory 15 stores image data to be displayed on the display monitor 16.
- This image data is composed of road map drawing data, various graphic data, and the like, which are appropriately selected based on the map data recorded on the DVD-ROM 19 read by the disk drive 18. .
- the navigation device 1 can display a map or the like by using the image data thus selected.
- the display monitor 16 displays various kinds of information such as a map near a usual current location and an enlarged map near the next guidance intersection on a screen and provides the user with the information.
- the input device 17 has various input switches for the user to set a destination and a transit point (hereinafter, these will be simply referred to as a destination), and this is realized by an operation panel, a remote controller, or the like.
- the user operates the input device 17 according to a screen instruction displayed on the display monitor 16 to specify a place name and a position on a map, and set a destination.
- the navigation device 1 uses the current location detected by the current location detection device 14 as a route search start point to calculate a route to the destination. This is performed based on a predetermined algorithm. By changing the display form, for example, the display color or the like, the route determined in this way is displayed on a normal map, distinguished from other roads, and displayed on the display monitor 16 on the screen. This allows the user to recognize the route on the map on the screen. In addition, the navigation device 1 instructs the user to travel in the direction of the image or sound so that the vehicle can travel along the route, and guides the vehicle.
- the navigation device 1 further includes, among the intersections at which the route turns (referred to as a guide intersection), a guide intersection to which the vehicle should pass next when viewed from the current location.
- An enlarged map near the next guidance intersection is displayed on the display monitor 16.
- the enlarged map referred to here is intended to provide the user with specialized information on the next guidance intersection, such as the turning direction and the distance from the current location, to the user easily.
- a reference intersection means the next guidance intersection unless otherwise specified.
- the screen display of the enlarged map is performed separately from the normal map display described above.
- the screen is divided vertically and horizontally, etc., and a normal map and an enlarged map are separately displayed on each divided screen.
- an enlarged map and a normal map may be switched and displayed automatically according to conditions such as distance and time, or by a user operation.
- the navigation device 1 can switch and display any one of three types of display forms of the enlarged map on the screen.
- a map around a guidance intersection is displayed in an enlarged scale by displaying a normal map at a predetermined scale in a predetermined range around the guidance intersection. Since this enlarged map can accurately represent the road near the guidance intersection, it is suitable for displaying when the vehicle approaches the guidance intersection.
- the enlarged map in the first display form is referred to as a simple enlarged map.
- a route from the current location to the guidance intersection is represented in a straight line, and a road or the like intersecting the route between the locations is displayed, so that the route from the current location to the guidance intersection is displayed.
- Information on the route is represented on an enlarged map.
- the approximate distance to the current intersection and the road that intersects can be displayed in an easy-to-see manner, making it suitable for display when the distance from the vehicle to the guidance intersection is not too far. I have.
- the enlarged map in the second display form is referred to as a linear enlarged map.
- a third display mode is a map that summarizes a normal map (hereinafter referred to as a map) by simplifying a road shape and the like based on a normal map in a range set to include the current location and a guidance intersection.
- a summary map is created and displayed as an enlarged map.
- This enlarged map makes it easy to see the approximate positional relationship between the current location and the guidance intersection, and is suitable for display when the distance from the vehicle to the guidance intersection is somewhat long.
- the enlarged map in the third display form is referred to as an arbitrary enlarged map.
- the method of creating the map will be described later.
- FIG. 2 shows examples of the three types of enlarged maps described above.
- (A), (b), and (c) in Fig. 2 are examples of a simple enlarged map, a linear enlarged map, and an arbitrary enlarged map, respectively.
- a vehicle position mark 21 indicating the current location and the next guidance intersection 22 are displayed, and the route 23 is displayed in a different color from other roads.
- a gas station 24 is displayed on the map as a landmark of the guidance intersection 22.
- the name “XX intersection” of the guidance intersection 22 is displayed as a reference numeral 25, and below the display, the current location (own vehicle position mark) 21 and the guidance intersection 22 are displayed.
- the distance to is displayed as 26.
- a normal map is displayed on a predetermined scale in a predetermined range around the guidance intersection 22 as an enlarged map. Therefore, when the position of the current position (own vehicle position) changes due to the movement of the own vehicle, the display of the own vehicle position mark 21 moves on the enlarged map displayed on the screen and follows the change. The range of the enlarged map does not change. If the current position is outside the predetermined display range, the vehicle position mark 21 is not displayed on the enlarged map. Note that the direction of the enlarged map to be displayed is such that the approach direction when the route 23 enters the guidance intersection 22 is directed right above the screen.
- the display positions of the vehicle position mark 21 and the guidance intersection 22 on the screen are fixed, and the current location and the next guidance intersection are always displayed in one screen.
- a straight line connecting between them represents a route 23 from the current position (own vehicle position mark) 21 to the guidance intersection 22. Therefore, when the position of the current location changes, the vehicle position mark 21 and the planned intersection 22 do not move on the screen, and the range of the displayed enlarged map changes. As a result, the vehicle position mark 21 moves on the enlarged map.
- a road 27 intersecting with the route 23 is displayed as information from the current position (own vehicle position mark) 21 to the guidance intersection 22, and the name of the road, the route 23, and the like are displayed.
- the intersection name is also displayed.
- a convenience store 28 is displayed as a landmark of the intersection, and the distance from the current location (own vehicle position mark) 21 to the intersection is indicated by reference numeral 29 in front of the intersection, along route 23. Is displayed. There is no road that intersects Route 23 between the current location (own vehicle position mark) 21 and the guidance intersection 22. If not, these are of course not displayed.
- the highest type of road is adopted based on the type of road (expressway, national road, prefectural road, etc.).
- road types other than the highway, national highway, and prefectural road, which have higher road types are assumed to be lower than prefectural roads.
- roads that cross over Route 23 may be excluded from adoption.
- the summary map is created by executing a process called defonoreme processing based on the map data within the set map range.
- This deformation process is a known processing method. The contents of the deformation process will be described below.
- FIGS. 3 and 4 are detailed explanatory diagrams for explaining the contents of the deformation process used when creating a summary map in the present invention.
- the straightening of the road shape (thinning-out of the constituent points) will be described as the deformation process (1).
- each road shape has a node having position information (coordinate information). Is determined by a set of constituent points called.
- the end point # 2 is moved.
- the angle of ⁇ ⁇ is, for example, 45 °.
- the road shape By repeating the same operation and sequentially performing such processing for all points, the road shape finally becomes as shown in (h). In this way, the road shape is orthogonalized. As described above, by performing the straightening and orthogonalizing processes on the road shape, the deforming process ends. By performing this deforming process on the set map range, a summary map can be created. At this time, the position of the land mark is corrected as required, but the method is a known content, and the detailed description thereof will be omitted.
- step S1 it is determined whether or not the host vehicle is traveling on the set route.
- step S2 the process proceeds to step S2; otherwise, the process flow in FIG. 5 ends.
- step S2 the current geographical strength also calculates the distance to the guidance intersection.
- step S3 the display form of the enlarged map to be displayed is selected based on the calculated distance.
- the display mode selected here is one of the three types of display modes described above (simple enlarged map, straight-line enlarged map, and arbitrary enlarged map). The longer the distance calculated in step S2 is, the later the latter is. Make a choice.
- the thresholds T1 and T2 are set in advance and the distance from the current location calculated in step S2 to the guidance intersection is D
- the case of D ⁇ T1 is regarded as a simple enlarged map
- T1 ⁇ A case where D ⁇ T2 is a linear enlarged map
- T2 ⁇ D is an arbitrary enlarged map.
- step S11 map data within a predetermined range from the guidance intersection is read.
- step S12 a map near the proposed intersection is displayed on the display monitor 16 at a predetermined scale based on the map data read in step S11.
- the range in which the map data is read in step S11 is that a fixed predetermined range is set in advance according to the scale of the map in the next step S12 and the display range to be displayed on the screen of the display monitor 16. I do.
- step S13 the already set route and the current location mark are displayed on the enlarged map displayed in step S12.
- step S14 the road name of the route, the landmark of the next guidance intersection, and the like are displayed on the enlarged map, and the name of the guidance intersection is displayed in a display area different from the enlarged map.
- the data for displaying these in step S14 is included in the map data read in step S11.
- step S15 the distance from the current position calculated in step S2 in FIG. 5 to the next guidance intersection is displayed in a display area different from the enlarged map. For example, it is displayed in the display position below the position where the name of the next guidance intersection is displayed in step S14.
- step S15 the process returns to the processing flow of FIG.
- a simple enlarged map as shown in FIG. 2A is displayed.
- step S23 the display pattern extracted in step S22 is displayed on the display monitor 16 to display a simplified form (simplified shape) of the guidance intersection.
- the simplified shape of the guidance intersection is displayed at a preset position on the screen. Thereby, an enlarged map is displayed for the guidance intersection.
- step S24 the guidance intersection displayed in step S23 is displayed by connecting it with a straight line from the current location set in advance on the screen. As a result, an enlarged map is displayed for the route from the current location to the guidance intersection.
- step S25 based on the map data read in step S21, a road that intersects the straight line displayed in step S24, that is, the route from the current location to the guidance intersection is obtained.
- step S26 it is determined whether or not the road intersecting in step S25 has been determined. If there is at least one intersecting road, go to step S27. If there is no intersecting road, go to step S32.
- a river, a railroad, or the like that crosses the route may be extracted instead of the road.
- map data data on rivers and railways are recorded as background data.
- the background data does not record the connection information with the route. Therefore, it is not possible to determine directly from the data whether or not a background such as a river or a railway crosses the route. Therefore, depending on the positional relationship between the route and the background , To determine whether or not to cross.
- rivers and railways are extracted from the background data of the same map area as the route, and whether or not they are located between the current location and the guidance intersection is determined from the positional information (coordinate information) of both. I do. Based on this, it is determined whether or not the river or railway crosses the route from the current location to the guidance intersection.
- step S28 it is determined whether there are a plurality of roads extracted in step S27.
- step S27 it is determined whether there are two or more crossing roads of the same type. For example, if there are two or more national roads that are intersected by a highway, the multiple national roads are extracted in step S27. As described above, when a plurality of roads are extracted, a positive determination is made in step S28, and the process proceeds to step S29. Otherwise, if only one road has been extracted, the process proceeds to step S30.
- step S29 from among the plurality of roads extracted in step S27, only one road closest to the current location is selected and extracted.
- step S30 one of the roads extracted in step S27 (if step S28 is negatively determined) or one of the roads extracted in step S29 from multiple roads (if step S28 is determined positively) Either of them intersects with the straight path displayed in step S24 and is displayed in a straight line. As a result, an enlarged map is displayed for the road that intersects the route before the guidance intersection.
- step S30 the position at which the route and the road intersect is the actual distance from the current location to the guidance intersection (distance A) and the actual distance from the current location to the intersection of the route and the road (distance B). ) May be changed according to the ratio. For example, if the distance A is Slkm and the distance B is 250m, the position is the same as the ratio, that is, 1/4 of the length to the guidance intersection based on the current position on the screen. Try to cross the road. Alternatively, according to the ratio between the distances A and B, the positions may be different ratios or fixed positions.
- step S31 the distance from the current position to the intersection between the route and the road displayed in step S30 is displayed.
- the indication of this distance is displayed along route 23 just before the intersection.
- steps S32 to S34 the same processing as in steps S13 to S15 in FIG. 6 is performed. That is, in step S32, the already set route and the current location mark are displayed on the enlarged map, and in step S33, the road names and landmarks are displayed on the enlarged map. And the intersection name is displayed in another display area.
- step S33 When displaying the road name and landmark in step S33, also display the road that intersects before the guidance intersection, which is displayed in step S30, which is different from only the route and the guidance intersection, Further, the name of the intersection is also displayed. Then, in step S34, the distance from the current location to the guidance intersection is displayed in a display area separate from the enlarged map. After ending step S34, the process returns to the processing flow of FIG. By executing the linearly enlarged map display processing as described above, a linearly enlarged map as shown in FIG. 2 (b) is displayed.
- step S41 map data within a range including the guidance intersection and the current location is read.
- the range from which the map data is read is a variable range that is set so as to include the current location and the guidance intersection in accordance with the positional relationship between the current location and the guidance intersection, and is defined, for example, by an ellipse whose focus is on the current location and the planned intersection. .
- This is different from the fixed read range in step S11 in FIG. 6 and also different from the read range along the route in step S21 in FIG. If the next guidance intersection and the next guidance intersection are within the specified distance, the map data read range is set so that both guidance intersections are included.
- step S42 a range for creating a summary map is set.
- the range set here may be the same as or smaller than the range from which the map data was read in step S41.
- a range including at least the guidance intersection and the current location is set.
- step S43 a summary map within the range set in step S42 is created. The method of creating this summary map is as described above, and will not be described here. By displaying this summary map, an enlarged map within the set range is displayed.
- steps S44 and S46 the same processing as in steps S13 and S15 in FIG. 6 is performed. That is, in step S44, the already set route and the current location mark are displayed on the enlarged map, and in step S45, the road names and landmarks are displayed on the enlarged map, and the intersection name is displayed in another display area. Is displayed. Then, in step S46, the distance from the current location to the guidance intersection is displayed in a display area separate from the enlarged map. After the end of step S46, the process returns to the processing flow of FIG.
- the straight-line enlarged map display processing described above is executed. By doing so, an arbitrary enlarged map as shown in Fig. 2 (c) is displayed.
- the crossing position is determined by the distance from the current location to the next guidance intersection, and the intersection of the route and the road from the current location. If the distance is changed by the ratio to the distance to the intersection, the approximate distance from the current position to the displayed mark and the guidance intersection can be displayed in an easy-to-understand manner.
- the enlarged map has a plurality of display forms, which are switched and displayed on the screen.
- one of the three display modes a simple enlarged map, a linear enlarged map, or an arbitrary enlarged map
- a simple enlarged map is displayed on the screen.
- an enlarged map of the route from the current location to the next guidance intersection can be displayed in an easy-to-read manner according to the situation at that time.
- the display mode of the enlarged map is switched according to the distance from the current location to the next guidance intersection. Specifically, for the three types of display formats, simple enlarged map, straight-line enlarged map, and arbitrary enlarged map, the latter is selected as the distance becomes longer.
- a simple enlarged map is used. If the threshold value is equal to or larger than the threshold value T1 and smaller than the threshold value T2, a linear enlarged map is set. The enlarged map is selected and displayed on the screen. With this configuration, the enlarged map can be displayed in the most easily viewable display form according to the distance from the current location to the next guidance intersection.
- the display mode of the enlarged map may be switched according to the result of the selection made by the user, for example, the operation of the input device 17 by the user, or the conditions set in advance by the user. By doing so, it is possible to display the enlarged map in an easily viewable manner in a display form according to the user's preference.
- map data is read from a storage medium such as a DVD-ROM
- the present invention is not limited to this.
- the present invention can be applied to a communication navigation device or the like that downloads map data from an information distribution center using wireless communication using a mobile phone or the like.
- the display process of the enlarged map as described above may be performed in the information distribution center.
- FIG. 9 is a diagram showing this state.
- a communication terminal 300 is connected to the navigation device 200 provided in the vehicle 100.
- As the communication terminal 300 a mobile phone or the like is used.
- Communication terminal 300 is wirelessly connected to mobile communication network 400.
- An information distribution center 500 is connected to the mobile communication network 400. That is, the navigation device 20 0 is connected to the information distribution center 500 via the communication terminal 300 and the mobile communication network 400.
- the navigation device 200 transmits a distribution request for map data to the information distribution center 500.
- the information distribution center 500 executes the processing described above in response to the distribution request, and distributes the map data to the navigation device 200.
- the navigation device 200 receives the map data distributed from the information distribution center 500 via the mobile communication network 300 and the communication terminal 200.
- the present invention can be applied to such a communication navigation system.
- FIG. 10 is a diagram showing this state.
- the personal computer 600 receives the program via the CD-ROM 602. Further, the personal computer 600 has a function of connecting to the communication line 601, and the above program is provided from the server 603.
- the communication line 601 is a communication line such as the Internet or personal computer communication, or a dedicated communication line.
- the server 603 transmits the program to the personal computer 600 via the communication line 601. That is, the program is converted into a data signal on a carrier wave and transmitted via the communication line 601.
- the program can be supplied as a computer-readable computer program product in various forms such as a recording medium and a carrier wave.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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DE112004001569T DE112004001569T5 (de) | 2003-08-26 | 2004-08-25 | Fahrzeuginternes Informationsendgerät |
US10/569,377 US7636634B2 (en) | 2003-08-26 | 2004-08-25 | On-vehicle information terminal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-300838 | 2003-08-26 | ||
JP2003300838A JP4676684B2 (ja) | 2003-08-26 | 2003-08-26 | 車載情報端末 |
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WO2005020187A1 true WO2005020187A1 (ja) | 2005-03-03 |
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PCT/JP2004/012167 WO2005020187A1 (ja) | 2003-08-26 | 2004-08-25 | 車載情報端末 |
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US (1) | US7636634B2 (ja) |
JP (1) | JP4676684B2 (ja) |
CN (1) | CN100492449C (ja) |
DE (1) | DE112004001569T5 (ja) |
WO (1) | WO2005020187A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
US7636634B2 (en) | 2009-12-22 |
JP4676684B2 (ja) | 2011-04-27 |
JP2005070485A (ja) | 2005-03-17 |
CN100492449C (zh) | 2009-05-27 |
CN1842832A (zh) | 2006-10-04 |
DE112004001569T5 (de) | 2006-06-14 |
US20070005241A1 (en) | 2007-01-04 |
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