Vehicle navigation apparatus with variable speed disc drive
First Claim
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1. An information processing apparatus comprising:
- a memory medium in which data is stored;
a drive motor for driving said memory medium at least at two different operating speeds for reading of said data, including a first speed and a second speed faster than said first speed, responsive to an input signal;
read means for reading the stored data from said driven memory medium, responsive to various command signals inclusive of at least one designated command signal, at said different speeds;
judgment means for making an affirmative judgement by detection of input of a designated command signal or satisfaction of one of a plurality of predetermined conditions and making a negative judgement when no designated command signal or predetermined condition is detected; and
control means for controlling the speed of rotation of said drive motor to drive said memory medium at said first speed responsive to said negative judgement and at said second speed responsive to said affirmative judgement.
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Abstract
An information processing apparatus, for reading information from a memory medium such as a CD-ROM and displaying read information, includes a controller for controlling a drive motor which drives the memory medium. The drive motor is normally driven at a normal speed but is driven at a higher speed when a certain operation requires reading a large amount of information data within a certain time. After the data is read at high speed, the drive motor is automatically switched to normal speed. The drive motor drives at the higher speed only when necessary, so that the drive motor retains its durability and the information processing apparatus is more responsive.
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Citations
24 Claims
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1. An information processing apparatus comprising:
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a memory medium in which data is stored; a drive motor for driving said memory medium at least at two different operating speeds for reading of said data, including a first speed and a second speed faster than said first speed, responsive to an input signal; read means for reading the stored data from said driven memory medium, responsive to various command signals inclusive of at least one designated command signal, at said different speeds; judgment means for making an affirmative judgement by detection of input of a designated command signal or satisfaction of one of a plurality of predetermined conditions and making a negative judgement when no designated command signal or predetermined condition is detected; and control means for controlling the speed of rotation of said drive motor to drive said memory medium at said first speed responsive to said negative judgement and at said second speed responsive to said affirmative judgement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A vehicle navigation apparatus comprising:
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sensor means for detecting present location of the vehicle; a memory medium in which guidance data is stored, said guidance data including map data; a drive motor for driving said memory medium at least at two different operating speeds for reading of said data, including a first speed and a second speed faster than said first speed; a display unit; input means operable by a driver of the vehicle, for input of a destination and for input of various commands including a designated command for execution of a route search routine for determining an optimum route to said destination; read means for reading the guidance data from said driven memory medium responsive to an input command at said different speeds; detection means for detecting satisfaction of a predetermined condition; judgment means for making an affirmative judgement by detection of input of a designated command or detection of satisfaction of a predetermined condition and making a negative judgement when no designated command or predetermined condition is detected; and control means for controlling the speed of rotation of said drive motor to drive said memory medium at said first speed responsive to said negative judgement and at said second speed responsive to said affirmative judgement, said control means comprising data processing means for determining present location based on signals received from said sensor means, for retrieving guidance data through said read means, for processing the retrieved guidance data to produce guidance information including a display of a map at said display unit with the predetermined present location indicated thereon. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification