Variable magnification viewfinder device and method for changing luminance of displayed information

摘要

In a variable magnification viewfinder device, information displayed on a liquid crystal panel and a viewfinder image are combined with each other through a prism. When a variable power lens is inserted in a viewfinder optical path, viewfinder magnification is changed. Based on the change in the viewfinder magnification, brightness of a backlight unit is changed and luminance of the information displayed on the liquid crystal panel is changed. In a viewfinder field of view, the information and the viewfinder image are displayed at substantially the same brightness.

主权项

1. A variable magnification viewfinder device comprising:
a variable magnification viewfinder optical system provided independently from an imaging system comprising a taking lens and a solid state image sensor, the variable magnification viewfinder optical system inserting or retracting a variable power lens into or from a viewfinder optical path between an objective lens and an eyepiece lens in an interlocking manner with an operation for changing a magnification of the taking lens and changing a viewfinder magnification stepwise; an electronic display panel for displaying information related to imaging; an optical path member for introducing the information displayed on the electronic display panel to a viewfinder field of view from a position closer to the eyepiece lens than a position at which the variable power lens is inserted or retracted; and a luminance changing section for automatically changing luminance of the information displayed on the electronic display panel, in accordance with the change in the viewfinder magnification.