Camera having a finger detecting device
AssigneeFuji Photo Optical Co., Ltd.
InventorsHideo Yoshida, Kazuaki Nagata
Life of this patent
Estimating the term…
Abstract
Detection electrodes formed from a thin metal plate are attached to rear faces of a lens barrier, a lens barrel and a decorative sheet. The detection electrodes are respectively connected to phase-difference detection circuits used for the lens barrier and the lens barrel. High-frequency pulse signals of a detection side and a reference side are inputted into the phase-difference detection circuits. When a finger touches the lens barrier or the lens barrel, a phase of the detection-side pulse signal is delayed relative to a phase of the reference-side pulse signal by influence of capacitance applied to the detection electrodes. The phase-difference detection circuit detects the overlap of a finger from the delay of the detection-side pulse signal.
Claims15
A camera having a lens barrel, a lens barrier and at least one electric drive source for driving said lens barrel and said lens barrier, said lens barrel being protruded and collapsed between a collapsible-mount position where said lens barrel is contained in a camera body, and a protrusion position where said lens barrel is protruded through a lens-barrel orifice formed in the front of said camera body, said lens barrier covering said lens-barrel orifice when said lens barrier is set to said collapsible-mount position, and said lens barrier opening said lens-barrel orifice when said lens barrel is protruded toward said protrusion position, said camera comprising:
- finger detection means for detecting a finger overlapping with said lens barrel;
- and
- lens-barrel stop means for stopping movement of said lens barrel when said finger detection means detects the finger while one of protruding and collapsing said lens barrel;
- wherein said finger detection means comprises a detection electrode attached to a decoration sheet of said lens barrel.
A camera having a lens barrel, a lens barrier and at least one electric drive source for driving said lens barrel and said lens barrier, said lens barrel being protruded and collapsed between a collapsible-mount position where said lens barrel is contained in a camera body, and a protrusion position where said lens barrel is protruded through a lens-barrel orifice formed in the front of said camera body, said lens barrier covering said lens-barrel orifice when said lens barrier is set to said collapsible-mount position, and said lens barrier opening said lens-barrel orifice when said lens barrel is protruded toward said protrusion position, said camera comprising:
- a first finger detection means for detecting a finger overlapping with said lens barrel, comprising a first detection electrode attached to said lens barrel;
- a second finger detection means for detecting a finger overlapping with said lens barrier, comprising a second detection electrode attached to said lens barrier.
Dependencies are inferred from the claim text.