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Method of controlling transmission light amount and television camera apparatus using the method

  • US 20020047909A1
  • Filed: 10/19/2001
  • Published: 04/25/2002
  • Est. Priority Date: 10/23/2000
  • Status: Active Grant
First Claim
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1. A television camera apparatus for photoelectrically converting incident light originated from a photographing object to acquire a picture signal, comprising:

  • an image pick-up unit containing a plurality of photoelectric converting elements;

    a detection unit for detecting a range of a picture signal having a signal level higher than a predetermined level within said picture signals acquired from said image pick-up unit as a high luminance level range; and

    a transmission light amount control unit for controlling incident light amounts of said imaging light from the photographing object with respect to the respective photoelectric converting elements every each of said photoelectric converting elements;

    wherein;

    said transmission amount control unit is comprised of;

    a change-component detecting unit for detecting a change component between a first high luminance level range which is detected by said detection unit at a first predetermined time instant, and a second high luminance level range which is detected by said detection unit at a second predetermined time instant after said first predetermined time instant; and

    a control unit of controlling the light amount of the incident light entered into said photoelectric converting elements based upon said first predetermined time instant, said second predetermined time instant, and said detected change-component.

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