IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0896811
(2007-09-06)
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등록번호 |
US-7698057
(2010-05-20)
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우선권정보 |
JP-2006-242701(2006-09-07) |
발명자
/ 주소 |
- Kobayashi, Keita
- Gomi, Akihiro
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
7 인용 특허 :
2 |
초록
▼
An in-vehicle navigation apparatus is equipped with (i) an HDD for recording map data for display and, further, (ii) an external memory, which is not an HDD and in which the map data recorded in the HDD can be copied. The navigation apparatus performs the following: when the main power is supplied t
An in-vehicle navigation apparatus is equipped with (i) an HDD for recording map data for display and, further, (ii) an external memory, which is not an HDD and in which the map data recorded in the HDD can be copied. The navigation apparatus performs the following: when the main power is supplied to the map display device, the altitude of the position of the vehicle (startup altitude) is specified; when the specified startup altitude is equal to or higher than a reference altitude, the map data are read from the external memory and the corresponding map is thereby displayed on an image display device, with the HDD not activated; and when the specified startup altitude is lower than the reference altitude, the map data are read from the HDD and the corresponding map is thereby displayed on the image display device.
대표청구항
▼
What is claimed is: 1. A map display control apparatus in a vehicle, comprising: a first storage being a hard disk drive configured to record map data for displaying; a second storage different from the hard disk drive and configured to record at least a portion of the map data, the second storage
What is claimed is: 1. A map display control apparatus in a vehicle, comprising: a first storage being a hard disk drive configured to record map data for displaying; a second storage different from the hard disk drive and configured to record at least a portion of the map data, the second storage configured to hold recorded data without a supply of a main power of the apparatus; a third storage different from the hard disk drive and configured to record altitude information at a stop time when the main power of the apparatus is switched from an ON state to an OFF state; a startup altitude specification unit configured to read the altitude information stored in the third storage under a state that an operation of the first storage is kept not started, when the main power is re-switched from the OFF state to the ON state posterior to the stop time and to specify, based on the read altitude information, a startup altitude, which is an altitude of a position of the vehicle at a startup when the main power is re-switched from the OFF state to the ON state; and a startup control unit configured to read the map data from the second storage instead of the first storage to thereby cause an image display device to display a map based on the read map data in the state that the operation of the first storage is kept not started, when the specified startup altitude is equal to or higher than a reference altitude, and to start the operation of the first storage and read the map data from the first storage to thereby cause the image display device to display a map based on the read map data when the specified startup altitude is lower than the reference altitude. 2. The map display control apparatus of claim 1, further comprising: an operation altitude specification unit configured to specify an operation altitude, which is an altitude of a position of the vehicle when the apparatus operates except the startup; and an un-startup control unit configured to read the map data from the first storage to thereby cause the image display device to display a map based on the read map data when the specified operation altitude is lower than the reference altitude, to record at least a portion of the map data, which are recorded in the first storage, in the second storage when the specified operation altitude is lower than the reference altitude and equal to or higher than a preliminary reference altitude, which is lower than the reference altitude, and to stop the operation of the first storage and read the map data from the second storage to thereby cause the image display device to display a map based on the read map data when the specified operation altitude is equal to or higher than the reference altitude. 3. The map display control apparatus of claim 2, further comprising: a route specification unit configured to specify a route to a destination, wherein the un-startup control unit records, in the second storage, map data corresponding to a portion which includes the route among the map data recorded in the first storage. 4. A computer program product in a medium readable by a computer, the product comprising the instructions for the computer to function as the startup altitude specification unit and the startup control unit included in the map display control apparatus of claim 1. 5. A method for controlling an in-vehicle navigation apparatus having, for recording map data, a hard disk drive and a rewritable memory different from the hard disk drive and configured to hold recorded data without supply of a main power of the navigation apparatus, the navigation apparatus further having an additional memory different from the hard disk drive and configured to record data without supply of the main power of the navigation apparatus, the method comprising: recording, in the additional memory altitude information at a stop time when a main power of the navigation apparatus is switched from an ON state to an OFF state; reading the altitude information stored in the additional memory under a state that an operation of the hard disk drive is kept not started, when the main power is re-switched from the OFF state to the ON state posterior to the stop time and to specify, based on the read altitude information, a startup altitude, which is an altitude of a position of the vehicle at a startup when the main power to the navigation apparatus is re-switched from the OFF state to the ON state; reading the map data from the memory instead of the hard disk drive to thereby cause an image display device to display a map based on the read map data in the state that the operation of the hard disk drive is kept not started, when the specified startup altitude is equal to or higher than a reference altitude; and starting the operation of the hard disk drive and reading the map data from the hard disk drive to thereby cause the image display device to display a map based on the read map data when the specified startup altitude is lower than the reference altitude. 6. The method of claim 5, further comprising: specifying an operation altitude, which is an altitude of a position of the vehicle when the navigation apparatus operates except the startup; reading the map data from the hard disk drive to thereby cause the image display device to display a map based on the read map data when the specified operation altitude is lower than the reference altitude; recording at least a portion of the map data, which are recorded in the hard disk drive, in the memory when the specified operation altitude is lower than the reference altitude and equal to or higher than a preliminary reference altitude lower than the reference altitude; and stopping the hard disk drive and reading the map data from the memory to thereby cause the image display device to display a map based on the read map data when the specified operation altitude is equal to or higher than the reference altitude. 7. The map display control apparatus of claim 1, further comprising: a GPS receiver configured to be used for detecting an altitude, wherein: the third storage is configured to record the altitude information, which is determined based on the GPS receiver; and the startup altitude specification unit is configured to read the altitude information stored in the third storage when the main power is re-switched from the OFF state to the ON state, and specify the startup altitude using the altitude read from the third storage instead of using the altitude detected by the GPS receiver when the main power is re-switched from the OFF state to the ON state. 8. The map display control apparatus of claim 1, wherein the reference altitude is predetermined.
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