DIAPHRAGM DEVICE FOR VIDEO CAMERA LENS AND METHOD FOR CONTROLLING DIAPHRAGM DEVICE

摘要

A diaphragm device includes a diaphragm mechanism, a connector, an identification unit for identifying a control mode of a signal communicated via the multiple terminals on the basis of voltage of the signal, and a control unit, wherein the switching unit switches the communication path so that a pulse signal capable of driving the pulse signal driven actuator is generated for generating the pulse signal on the basis of the signal, and output to the pulse signal driven actuator if the control mode of the signal is identified as one based on a control mode incapable of directly driving the pulse signal driven actuator; and the switching unit switches the communication path so that the signal is output to the pulse signal driven actuator if the control mode of the signal is identified as a first control mode based on a pulse signal directly driving the pulse signal driven actuator.

主权项

1. A diaphragm device for a video camera lens interchangeably attached to a video camera body outputting a pulse signal for diaphragm control and a video camera body outputting a signal for diaphragm control different from the pulse signal, comprising:
a diaphragm mechanism which adjusts an amount of diaphragm of a lens; a pulse signal driven actuator which drives the diaphragm mechanism according to an input pulse signal; a connector connected to a video camera body and including a plurality of terminals enabling communication with the video camera body; an identification unit which identifies a control mode of a signal communicated via the plurality of terminals on the basis of voltage of the signal; and a control unit that includes a switching unit which switches a communication path of the signal depending on the identified control mode and that controls the pulse signal driven actuator by a pulse signal based on the signal, wherein: the switching unit switches the communication path so that a pulse signal capable of driving the pulse signal driven actuator is generated by a signal generating unit for generating the pulse signal on the basis of the signal, and output to the pulse signal driven actuator if the control mode of the signal is identified as one based on a control mode incapable of directly driving the pulse signal driven actuator; and the switching unit switches the communication path so that the signal is output to the pulse signal driven actuator if the control mode of the signal is identified as a first control mode based on a pulse signal capable of directly driving the pulse signal driven actuator.