Photography – Camera shake sensing – Having stabilization system
Reexamination Certificate
1999-08-24
2001-01-30
Gray, David M. (Department: 2851)
Photography
Camera shake sensing
Having stabilization system
C348S208400
Reexamination Certificate
active
06181875
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to cameras, and more particularly, to a camera having a camera-shake detector which detects camera-shake occurring when a picture is taken.
2. Description of the Related Arts
Some conventional cameras have been proposed with camera-shake detecting sensors which detect camera-shake to prevent pictures being blurred. A conventional camera provided with a camera-shake detecting sensor comprises a camera-shake detecting sensor, a correcting device for correcting camera-shake amount in response to output of detection, and a display unit for making display of a warning that a picture is being blurred.
A conventional camera which can correct camera-shake is responsive to output of camera-shake detecting sensor for correcting camera-shake amount so as to allow unblurred pictures to be taken and at the same time, display that unblurred picture are being taken.
Conventional cameras with camera-shake sensors are configured as described above. Therefore, the conventional cameras with camera-shake sensors make correction of camera-shake and at the same time, give a display that camera-shake is corrected.
However, it takes time for the camera-shake sensors to become able to provide stable output of camera-shake detection after the sensors are turned on. Accordingly, the output of the sensors can not be used until stabilized. Therefore, pictures taken before the sensors are stabilized can not be subjected to camera-shake correction. As a result, even those cameras provided with camera-shake-sensors and correction mechanism may produce blurred pictures without operating such mechanism in such a case.
SUMMARY OF THE INVENTION
An object of the present invention is to take reliably unblurred pictures using a camera with a camera-shake sensor.
Another object of the present invention is to eliminate unnecessary continuous driving of a taking lens in a camera with a camera-shake sensor.
Still another object of the present invention is to more precisely correct camera-shake in a camera with a camera-shake sensor.
According to the present invention, the objects described above can be achieved by a camera comprising the following elements. That is, a camera according to the present invention comprises a camera-shake detector for detecting camera-shake occurring when a picture is taken, a correction device for correcting camera-shake in response to output of the camera-shake detector, and a warning display unit for displaying a warning when the camera-shake detector is not operating.
Camera-shake detecting means can not detect camera-shake amount immediately after a signal for starting its operation is entered. Therefore, when such a camera-shake detector is in an inoperable state, a warning that the camera can not make camera-shake correction is displayed at a warning display portion. Then, a photographer can recognize that the camera-shake correction device is not operating and thus, does not start photographing until output of the camera-shake sensor is stabilized. As a result, it becomes possible to take reliably unblurred pictures using the camera with a camera-shake sensor.
In a camera according to the present invention, lens driving for camera-shake correction is detected when the camera-shake amount is large in the out-of-focus state. When the camera-shake amount is large in the out-of-focus state, the in-focus state can not be easily realized even if a taking lens is driven. According to the present invention, driving of a taking lens is inhibited when the camera-shake amount is large in the out-of-focus state. Therefore, unnecessary driving of the taking lens is eliminated in the camera with a camera-shake sensor.
According to the present invention, the camera-shake amount of a moving object is estimated using a plurality of camera-shake data. Accordingly, a precise camera-shake correction can be made in a camera with a camera-shake sensor even when an object is in motion.
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
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Hamada Masataka
Masumoto Hisayuki
Okada Takashi
Ootsuka Hiroshi
Burns Doane , Swecker, Mathis LLP
Gray David M.
Minolta Co. , Ltd.
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