Photographing data indicator for a single lens reflex camera

DETAILED DESCRIPTION To eliminate the described disadvantages of the prior art, it is an object of the invention to provide photographing data indicator for a single lens reflex camera which permits a plurality of types of photographing data to be concurrently displayed, by providing a first and a second drive electrode on a liquid crystal display panel, and selectively applying an exciting voltage to one or both of the electrodes, both the electrodes being configured such that one of them is provided with a through opening in the form of a numeral or letter and punched into the electrode while the other is configured as a solid character received in the punched space.
In accordance with the invention, the use of the single liquid crystal display panel is sufficient to provide a concurrent display of more than one type of photographing data.
This avoids the need for an increased spacing between the focusing glass and the pentaprism, thus effectively allowing the prevention of an increased size of a camera and a reduction in the finder magnification.
A lateral space required for the data display is reduced, allowing more than one piece of data to be displayed in a camera which has a comparable size to that of conventional cameras.
The photographing indicator of the present invention comprises: a first drive electrode having a through opening formed therein, the configuration of which represents photographing data; a second drive electrode having a solid configuration which represents photographing data and which is disposed inside the through opening formed in the first drive electrode; the first and second drive electrodes being disposed on a liquid crystal display panel which is in turn disposed within a viewfinder of a camera; and a drive means for operating said data indicator in a first mode wherein only the first drive electrode is visible, a second mode wherein only the second drive electrode is visible, and a third mode wherein both the first and second drive electrodes, as well as the portion of the liquid crystal display panel adjacent the electrodes, are invisible whereby the data indicator is totally transparent when operated in the third mode