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US 8,558,721 B2Granted
Position detection apparatus, image taking apparatus and position detection method
AssigneeSony Corporation
InventorsHitoshi Yano, Katsuhiro Onishi
Life of this patent
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Abstract
Disclosed herein is a position detection apparatus including: a signal line along which a bit array including a plurality of bits used for expressing information on one of absolute positions in a direction determined in advance is created repeatedly in the direction determined in advance; and an information reading-out section which is capable of making a movement relative to the signal line in the direction determined in advance in accordance with a driving operation carried out by driving means determined in advance and is used for reading out the information expressed by the bits from the signal line.
Claims7
A position detection apparatus comprising:
- a signal line along which a bit array including a plurality of bits used for expressing information on one of absolute positions in a direction determined in advance is created repeatedly in said direction determined in advance;
- and
- an information reading-out section which is capable of making a movement relative to said signal line in said direction determined in advance in accordance with a driving operation carried out by driving means determined in advance and is used for reading out said information expressed by said bits from said signal line, wherein
- every time a pulse signal determined in advance is supplied to said driving means determined in advance, said information reading-out section is driven to move over said signal line by a distance corresponding to the pitch of said bits included in said bit array;
- at an absolute-position acquisition point on said signal line, said information reading-out section reads out information expressed by a plurality of said bits as said information on said absolute position of said absolute-position acquisition point from said signal line;
- and
- information on a position relative to said absolute-position acquisition point is acquired by the information reading-out section by counting the number of said pulse signals supplied to said driving means determined in advance, and
- wherein said bit array comprises:
- a header portion created as a bit pattern determined in advance;
- and
- a real-data portion including bit data used for expressing said absolute position.
8 more elements
A position detection apparatus comprising:
- a first signal line along which a first bit array including a plurality of bits used for expressing information on one of absolute positions in a direction determined in advance is created repeatedly in said direction determined in advance;
- a second signal line along which a second bit array associated with said first bit array is created repeatedly in said direction determined in advance;
- and
- an information reading-out section which is capable of making a movement relative to said first and second signal lines in said direction determined in advance and is used for concurrently reading out pieces of information expressed by said bits from said first and second signal lines respectively, wherein
- at an absolute-position acquisition point on said first signal line, said information reading-out section reads out information expressed by a plurality of said bits as said information on said absolute position of said absolute-position acquisition point from said first signal line;
- and
- information on a position relative to said absolute-position acquisition point is acquired by said information reading-out section from said second signal line as a bit count obtained by counting the number of bits included in said second bit array as bits corresponding to said position relative to said absolute-position acquisition point.
4 more elements
An image taking apparatus comprising:
- a signal line along which a bit array including a plurality of bits used for expressing information on one of absolute positions in a direction determined in advance is created repeatedly in said direction determined in advance;
- an information reading-out section which is capable of making a movement relative to said signal line in said direction determined in advance and is used for reading out said information expressed by said bits from said signal line;
- and
- driving means for driving said information reading-out section to move over said signal line by a distance corresponding to the pitch of said bits included in said bit array every time a pulse signal determined in advance is supplied to said driving means, wherein
- at an absolute-position acquisition point on said signal line, said information reading-out section reads out information expressed by a plurality of said bits as said information on said absolute position of said absolute-position acquisition point from said signal line;
- and
- information on a position relative to said absolute-position acquisition point is acquired by said information reading-out section by counting the number of said pulse signals supplied to said driving means determined in advance,
- wherein said bit array comprises:
- a header portion created as a bit pattern determined in advance;
- and
- a real-data portion including bit data used for expressing said absolute position.
8 more elements
An image taking apparatus comprising:
- a first signal line along which a first bit array including a plurality of bits used for expressing information on one of absolute positions in a direction determined in advance is created repeatedly in said direction determined in advance;
- a second signal line along which a second bit array associated with said first bit array is created repeatedly in said direction determined in advance;
- and
- an information reading-out section which is capable of making a movement relative to said first and second signal lines in said direction determined in advance and is used for concurrently reading out pieces of information expressed by said bits from said first and second signal lines respectively, wherein
- at an absolute-position acquisition point on said first signal line, said information reading-out section reads out information expressed by a plurality of said bits as said information on said absolute position of said absolute-position acquisition point from said first signal line;
- and
- information on a position relative to said absolute-position acquisition point is acquired by said information reading-out section from said second signal line as a bit count obtained by counting the number of bits included in said second bit array as bits corresponding to said position relative to said absolute-position acquisition point.
4 more elements
A position detection method for driving an apparatus having
- a signal line along which a bit array including a plurality of bits used for expressing information on one of absolute positions in a direction determined in advance is created repeatedly in said direction determined in advance;
- and
- an information reading-out section which is capable of making a movement relative to said signal line in said direction determined in advance in accordance with a driving operation carried out by driving means determined in advance and is used for reading out said information expressed by said bits from said signal line,
- said position detection method comprising:
- driving said information reading-out section to read out bit information from said signal line;
- driving said information reading-out section to move over said signal line by a distance corresponding to the pitch of said bits included in said bit array every time a pulse signal determined in advance is supplied to said driving means determined in advance;
- and
- driving said information reading-out section to acquire information on a position relative to an absolute-position acquisition point, at which said information reading-out section reads out information expressed by a plurality of said bits on said signal line as information on the absolute position of said absolute-position acquisition point from said signal line, by counting the number of said pulse signals supplied to said driving means determined in advance,
- wherein said bit array comprises:
- a header portion created as a bit pattern determined in advance;
- and
- a real-data portion including bit data used for expressing said absolute position.
9 more elements
A position detection method for driving an apparatus having
- a first signal line along which a first bit array including a plurality of bits used for expressing information on one of absolute positions in a direction determined in advance is created repeatedly in said direction determined in advance;
- a second signal line along which a second bit array associated with said first bit array is created repeatedly in said direction determined in advance;
- and
- an information reading-out section which is capable of making a movement relative to said first and second signal lines in said direction determined in advance and is used for concurrently reading out pieces of information expressed by said bits from said first and second signal lines respectively,
- said position detection method comprising:
- driving said information reading-out section to read out pieces of bit information concurrently from said first signal line and said second signal line;
- and
- driving said information reading-out section to acquire information on a position relative to an absolute-position acquisition point from said second signal line as a bit count obtained by counting the number of bits included in said second bit array as bits corresponding to said position relative to said absolute-position acquisition point at which said information reading-out section reads out information expressed by a plurality of said bits on said first signal line as information on the absolute position of said absolute-position acquisition point from said first signal line.
5 more elements
Dependencies are inferred from the claim text.