Imaging apparatus using solid state image sensor

Details Imaging apparatus using solid state image sensor Imaging apparatus using solid state image sensor

1987-04-15

1989-02-28

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358228, H04N 5238

Patent

active

048090760

ABSTRACT:
In an imager, an image sensor has a pn junction at which positive and negative carriers are created in accordance with a quantity of light incident to the pn junction. One type of the positive and negative carriers is read out as an image signal and as soon as the other type is created, it is delivered out of the image sensor. A photometric circuit connected to the image sensor calculates a quantity of the incident light on the basis of the other type of carriers delivered from the image sensor and generates an incident light quantity signal. In accordance with the incident light quantity signal, an incident light quantity adjusting signal generator and an incident light quantity adjuster adjust the quantity of the light incident to the image sensor to an optimum value to thereby obtain proper exposure.

REFERENCES:
patent: 3649837 (1972-03-01), Lehovec
patent: 4242599 (1980-12-01), Suzuki
"An Electronic Still Camera System", Tanaka et al., IEEE Trans. on Consumer Electronics, vol. CE-32, No. 3, Aug. 1986, pp. 345-354.

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