|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||250/201 ; 250/204|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 11 인용 특허 : 5|
When the disclosed automatic focusing device detects that a computed distance measurement is inaccurate, it shifts the lens a predetermined length to a new position for another measurement. A system senses when the inaccuracy arises from an overly dim scene, for which a distance cannot be properly measured in any case, and inhibits the successive shifts to avoid waste of energy.
An automatic focusing device having a detecting circuit for detecting an object by a sensor so as to calculate information concerning the amount of movement of a lens to an in-focus position on the basis of an output of the sensor and for detecting whether contrast of the object is low or not, and having a driving circuit for driving the lens in response to the information calculated by the detecting circuit so as to carry out the focusing operation, said device comprising: (a) a control circuit for inhibiting the response of the driving circuit to the i...