| 摘要 |
An automatic exposure control device for a camera is actuated by outputs from two separate delay circuits. The first delay circuit includes means for storing an electrical signal in accordance with the brightness of an object to provide a first output, and the second delay circuit includes means for storing an electrical signal representative of a desired flash time delay to provide a second output. A switching circuit is responsive to the first and second outputs whereby a flash circuit is actuated only when the second output exceeds the first output. A modified embodiment incorporates a third delay circuit and the flash is actuated only when the first output is less than the third output or when the first output exceeds the third output which in turn exceeds the second output. The first and second delay circuits are respectively responsive to the brightness of the entire picture and a central portion of the picture, whereas the third delay circuit provides the desired flash time delay.
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