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 Image pick-up device with auto lens control for freely selecting photometric area

Details
Inventors: Mimura, Hidetoshi; Kogane, Haruo; Sube, Makoto;
Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP)
Primary Examiner: Razavi; Michael T.
Assistant Examiner: Greening; Wendy R.
Attorney, Agent or Firm: Stevens, Davis, Miller & Mosher

A video camera specifies as a photometric area any block of a field of image to be picked up and picks up a subject to be seen by optimizing the amount of light regardless of the position where a television camera is located. The video camera comprises a solid-state image pick-up element (CCD), a display device and devices for controlling the diaphragm of a lens. In operation, the image picked up by the solid-state image pick-up element is divided into plural blocks to be displayed. Any block of these plural blocks can be specified as a photometric area. The amount of light for the photometric area is calculated and the diaphragm of the lens is controlled so that the subject can be seen by optimizing amount of light.

DETAILED DESCRIPTION An object of the present invention is to provide a video camera which can optionally set a photometric area to optimize an amount of light, thus preventing a subject from being so dark that it cannot be seen under any condition that a television camera is located, and also can easily set the photometric area.
In order to achieve the above object, in accordance with the present invention, there is provided a video camera comprising image pick-up means having an ALC function, means for dividing a field of image into plural blocks, display means for mixing these plural blocks of the field with the image picked up by the image pick-up means, and control means for performing the ALC function for the plural field blocks other than selected blocks for masking parts of the field.
In accordance with the present invention, by optionally setting photometric areas excluding excessively luminal areas, the subject can be seen with an optimized amount of light under any condition where the television camera is located.
Further, since the selected block can be displayed, the position where the present photometric areas are located can be recognized apparently.
The above and other objects and features of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings.



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