Camera having preliminary flash device for preventing red-eye
AssigneeCanon Kabushiki Kaisha
InventorJiro Kazumi
Life of this patent
Estimating the term…
Abstract
A camera of the kind performing a preliminary flashing action before flash photographing for the purpose of preventing the red-eye phenomenon is arranged to give indications to enable the photographer to know selection of a preliminary flashing mode when this mode is selected and execution of the preliminary flashing action when the preliminary flashing action becomes feasible.
Claims24
A camera arranged to perform, prior to flash photographing, a preliminary flashing action on an object so as to prevent a red-eye phenomenon, comprising:
- a) selection means for selecting a preliminary flashing mode of executing the preliminary flashing action;
- b) a detecting circuit arranged to detect a state of preparation for flash photography;
- and
- c) an indicating device for indicating selection of the preliminary flashing mode when the preliminary flashing mode is selected by said selection means, and for indicating execution of the preliminary flashing action when the preliminary flashing mode is selected by said selection means and completion of the preparation for flash photography is detected by said detecting circuit.
A camera arranged to perform, prior to flash photographing, a preliminary flashing action on an object so as to prevent a red-eye phenomenon, comprising:
- a) selection means for selecting a preliminary flashing mode of executing the preliminary flashing action;
- b) a detecting circuit arranged to detect a state of preparation for flashing photography;
- c) an indicating device for indicating selection of the preliminary flashing mode when the preliminary flashing mode is selected by said selection means, and for indicating execution of the preliminary flashing action when the preliminary flashing mode is selected by said selection means and completion of the preparation for flash photography is detected by said detecting circuit;
- and
- d) a control circuit for causing the preliminary flashing action to be executed, said control circuit being arranged to operate after the execution of the preliminary flashing action is indicated by said indicating device.
A camera arranged to perform, prior to flash photographing, a preliminary flashing action on an object so as to prevent a red-eye phenomenon, comprising:
- a) a light measuring circuit arranged to form a light measurement value to be used for exposure control;
- b) a control circuit for causing the preliminary flashing action to be executed;
- and
- c) a processing circuit having a first mode in which an output of said light measuring circuit obtained while the preliminary flashing action is in process is process as the light measurement value to be used for exposure control and a second mode in which an output of said light measuring circuit obtained while the preliminary flashing action is not executed is processed as the light measurement value to be used for exposure control.
A camera arranged to perform, prior to flash photographing, a preliminary flashing action on an object so as to prevent a red-eye phenomenon, comprising:
- a) a light measuring circuit;
- b) a first control circuit arranged to cause the preliminary flashing action to be executed;
- c) an automatic focusing device having a one-shot automatic focusing mode in which a driving action of a lens in inhibited after an in-focus state is attained once;
- d) a lock circuit for locking an output of the light measuring circuit when an automatic focusing action is performed in the one-shot automatic mode;
- and
- e) a second control circuit arranged to render said first control circuit operative after the output of said light measuring circuit is locked by said lock circuit.
A camera arranged to perform, prior to flash photographing, a preliminary flashing action on an object so as to prevent a red-eye phenomenon, comprising:
- a) a light measuring circuit;
- b) a lock circuit arranged to lock an output of said light measuring circuit in response to an operation of an operation member performed before a shutter release process is performed by an operation of a shutter release member;
- and
- c) an inhibition circuit arranged to inhibit the preliminary flashing action from being executed concurrently with a locking action of said lock circuit when said lock circuit is operating.
A camera arranged to perform, prior to flash photographing, a preliminary flashing action on an object so as to prevent a red-eye phenomenon, comprising:
- a) a light measuring circuit;
- b) a flashing control circuit arranged to cause the preliminary flashing action to be executed;
- c) a lock circuit arranged to lock a light measurement output of said light measuring circuit obtained at a predetermined point of time before a shutter release;
- and
- d) a second control circuit arranged to suspend the preliminary flash action when a locking action of said lock circuit is performed on the light measurement output while the preliminary flashing action is in process.
Dependencies are inferred from the claim text.