IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0439555
(1999-11-12)
|
우선권정보 |
JP-10-329564(1998-11-19) |
발명자
/ 주소 |
|
출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
6 인용 특허 :
7 |
초록
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An apparatus, such as a focus adjusting apparatus, includes a focus adjusting system, a driving device which drives the focus adjusting system from one of a state in which a near-distance object is in focus and a state in which a far-distance object is in focus to the other, and a control device whi
An apparatus, such as a focus adjusting apparatus, includes a focus adjusting system, a driving device which drives the focus adjusting system from one of a state in which a near-distance object is in focus and a state in which a far-distance object is in focus to the other, and a control device which repeatedly performs determination of a focusing state of the focus adjusting system while causing the driving device to drive the focus adjusting system, and, if the focus adjusting system has been driven in one direction until the number of times of the determination repeatedly performed reaches a predetermined number of times, restrains the focus adjusting system from being driven in the one direction, so that a focus adjusting operation can be appropriately performed.
대표청구항
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The invention claimed is: 1. An apparatus comprising: (A) a driving device which drives a focus adjusting system; and (B) a control device having a first driving mode for minutely driving said focus adjusting system before a second climbing-drive mode for driving said focus adjusting system at a sp
The invention claimed is: 1. An apparatus comprising: (A) a driving device which drives a focus adjusting system; and (B) a control device having a first driving mode for minutely driving said focus adjusting system before a second climbing-drive mode for driving said focus adjusting system at a speed higher than in said first driving mode which, in said first driving mode repeatedly performs determination of a focusing state of said focus adjusting system while causing said driving device to drive said focus adjusting system, and, if said focus adjusting system has been driven in one direction until the number of times of the determination repeatedly performed reaches a predetermined number of times, inverts said focus adjusting system from being driven in said one direction; and an image pickup device which receives a light flux taken in through said focus adjusting system, wherein said control device controls said driving device to drive said focus adjusting system in such a direction as to increase a predetermined high-frequency component of a picked-up image signal from said image pickup device. 2. An apparatus, comprising: (A) a driving device which drives a focus adjusting system; and (B) a control device having a first driving mode for minutely driving said focus adjusting system before a second climbing-drive mode for driving said focus adjusting system at a speed higher than in said first driving mode which, in said first driving mode , repeatedly performs determination of a focusing state of said focus adjusting system while causing said driving device to drive said focus adjusting system, and, if said focus adjusting system has been driven in one direction until the number of times of the determination repeatedly performed reaches a predetermined number of times, inverts said focus adjusting system from being driven in said one direction, wherein said control device controls said driving device to drive said focus adjusting system in such a direction as to bring said focus adjusting system into an in-focus state, and wherein, if said focus adjusting system has been driven within a predetermined range for a predetermined period of time, said control device determines that said focus adjusting system is in an in-focus state. 3. An apparatus comprising: A) a driving device which drives a focus adjusting system; and (B) a control device having a first driving mode for minutely driving said focus adjusting system before a second climbing-drive mode for driving said focus adjusting system at a speed higher than in said first driving mode which, in said first driving mode , repeatedly performs determination of a focusing state of said focus adjusting system while causing said driving device to drive said focus adjusting system, and, if said focus adjusting system has been driven in one direction until the number of times of the determination repeatedly performed reaches a predetermined number of times, inverts said focus adjusting system from being driven in said one direction, wherein said control device controls said driving device to drive said focus adjusting system in such a direction as to brine said focus adjusting system into an in-focus state, and wherein, if said focus adjusting system has been driven within a predetermined range for a predetermined period of time, said control device stops driving of said focus adjusting system by said driving device. 4. An apparatus comprising: (A) a driving device which drives a focus adjusting system; and (B) a control device having a first driving mode for minutely driving said focus adjusting system before a second climbing-drive mode for driving said focus adjusting system at a speed higher than in said first driving mode which, in said first driving mode , repeatedly performs determination of a focusing state of said focus adjusting system while causing said driving device to drive said focus adjusting system, and, if said focus adjusting system has been driven in one direction until the number of times of the determination repeatedly performed reaches a predetermined number of times, inverts said focus adjusting system from being driven in said one direction, wherein said control device controls said driving device to drive said focus adjusting system in such a direction as to bring said focus adjusting system into an in-focus state, and wherein, if said focus adjusting system has been driven beyond a predetermined range in a predetermined period of time, said control device controls said driving device to drive said focus adjusting system at a faster speed in a direction in which said focus adjusting system has been driven. 5. An apparatus comprising: (A) a driving device which drives a focus adjusting system; and (B) a control device having a first driving mode for minutely driving said focus adjusting system before a second climbing-drive mode for driving said focus adjusting system at a speed higher than in said first driving mode which, in said first driving mode , repeatedly performs determination of a focusing state of said focus adjusting system while causing said driving device to drive said focus adjusting system, and, if said focus adjusting system has been driven in one direction until the number of times of the determination repeatedly performed reaches a predetermined number of times, inverts said focus adjusting system from being driven in said one direction, wherein said control device controls said driving device to drive said focus adjusting system in such a direction as to bring said focus adiusting system into an in-focus state, and wherein, in said first mode , if said focus adjusting system has been driven in one direction until the number of times of the determination repeatedly performed reaches the predetermined number of times, restrains said focus adjusting system from being driven in said one direction. 6. An apparatus according to claim 5, wherein, in said first driving mode, if said focus adjusting system has been driven beyond a predetermined range in a predetermined period of time, said control device controls said driving device to drive said focus adjusting system in said second driving mode in a direction in which said focus adjusting system has been driven. 7. An apparatus comprising: (A) a driving device which drives a focus adjusting system; and (B) a control device having a first driving mode for minutely driving said focus adjusting system before a second climbing-drive mode for driving said focus adjusting system at a speed higher than in said first driving mode which, in said first driving mode , repeatedly performs determination of a focusing state of said focus adjusting system while causing said driving device to drive said focus adjusting system, and, if said focus adjusting system has been driven in one direction until the number of times of the determination repeatedly performed reaches a predetermined number of times, inverts said focus adjusting system from being driven in said one direction, wherein, in said first driving mode, if said focus adjusting system has been driven beyond a predetermined range in a predetermined period of time, said control device controls said driving device to drive said focus adjusting system in said second driving mode in a direction in which said focus adjusting system has been driven.
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