JPH0213516B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multiple exposure device for an electronic camera that converts information about a subject image into a still image signal using an imaging means and stores the signal in a storage means.

Conventionally, there has been no camera of this type capable of so-called multiple exposure, in which an image is obtained by superimposing a still image that has already been photographed and a still image that is currently being photographed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a multiple exposure device for an electronic camera that is simple in structure and easy to operate.

1 and 2 show the appearance of an embodiment of an electronic camera using the present invention. The camera includes an imaging unit 1 that photoelectrically converts a subject image into a still image signal;
The storage unit 2 includes memory cells for storing one frame of still image information for 20 frames. Both parts are separable as shown in Figures 3a and b.

A photographic lens 10 is attached to the front surface of the imaging section 1, and as shown in the cross-sectional view of FIG. do. Lens 10 has aperture 1
0a, a mosaic filter 11a for color separation is arranged in front of the image sensor 11. Furthermore, the imaging section 1 is provided with a finder 12 that penetrates from the front surface to the rear surface to define a photographic field of view, and as shown in FIG. An accessory shoe 14 and a release button 15 are provided. When the release button 15 is pressed lightly, a power supply switch inserted into the power supply circuit is turned on, and power is supplied. Along with this, a photometric operation is performed. When the release button 15 is pressed deeply, the power supply switch remains on and the photographing sequence is further started. Once the photographing sequence is started, it does not stop even if the release button 15 is released midway through. Also, the power supply switch remains ON until the shooting sequence ends. In FIG. 2, on the rear surface of the imaging unit 1 is a mode selection lever 16 for selecting one of a mode for automatically accessing memory cell addresses in the storage unit 2, a mode for manual access, and a mode for multiple exposure.
A push button 17 for manual access, a 7-segment display device 18 such as a liquid crystal display for displaying the address of the memory cell currently being accessed, and a switch 19 for disabling the audible warning device are provided. There is. Further, on the side surface of the imaging unit 1, there are mounting screws 100 for attaching external accessories such as a data imprinting device or an electronic monitoring device for monitoring a subject image, and a connector 13 for the accessories.
0 are arranged respectively.

On the rear surface of the storage unit 2, as shown in FIG. 2, there is a display device 201 such as a liquid crystal or electrochromic device for displaying the addresses of used memory cells;
A label 202 on which storage capacity (total number of memory cells, ie, number of frames that can be stored), etc. is printed is provided. Further, there is a detachable slider 203 on the side as shown in FIG. 3b. When this is slid to the right, the attachment/detachment key 204 protruding from the top surface of the storage section 2 slides in the same direction, and the locking key 204, which is not shown in the corresponding part of the imaging section 1, is disengaged and the storage section 2 can be removed from the imaging section 1. The storage section 2 is provided with a T-slot 205, which engages with the guide member 131 on the imaging section side during attachment and detachment.
I will guide you through it. Furthermore, a connector 206 and pins 207 are provided upright on the upper surface of the storage section 2 . The connector 206 is connected to a corresponding connector (not shown) of the imaging unit 1 to mutually transmit electrical signals.
The pin 207 mechanically transmits the storage capacity of the storage unit 2 to the imaging unit 1.

FIG. 5 illustrates the internal structure of the imaging element 11 of the imaging section 1. This is a CCD image sensor that uses a so-called interline charge-coupled device (CCD).
Light receiving element a ₁

Claims (1)

[Scope of Claims] 1. An optical system that forms a subject image, an imaging device that converts information about the subject image into a still image signal in response to a release operation, and a storage device that stores a plurality of frames of the still image signal. An electronic camera having: a means for first extracting a still image photographed immediately before as a first still image signal from among a plurality of still image signals stored in the storage means; a synthesizing means for synthesizing a second still image signal outputted from the means and the first still image signal to generate a third still image signal, wherein the third still image is generated by the release operation. A multiple exposure device for an electronic camera, characterized in that the signal is stored in a storage area of the storage means in which the first still image signal was stored. 2. Claim 1, wherein the synthesizing means outputs a signal corresponding to the arithmetic average of the first still image signal and the second still image signal as a third still image signal. A multiple exposure device for an electronic camera as described in Section 1.