Light receiving device with controllable sensitivity and...

Details Light receiving device with controllable sensitivity and... Light receiving device with controllable sensitivity and...

2006-04-25

2006-04-25

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S214100, C257S222000, C257S448000

Reexamination Certificate

active

07034274

ABSTRACT:
A light receiving device using a new method of controlling sensitivity and a spatial information detecting apparatus using the same technical concept are provided. This light receiving device comprises a photoelectric converter for receiving a light at a light receiving surface and generating amounts of electric charges corresponding to an intensity of received light; electrodes formed on the photoelectric converter; a charge collection area induced in the photoelectric converter by applying a control voltage to the electrodes to collect at least part of the electric charges generated in the photoelectric converter; a charge ejector for outputting the electric charges from the charge collection area; and a sensitivity controller for controlling the number of the electrodes, to which the control voltage is applied, to change size of the charge collection area in the light receiving surface of the photoelectric converter. As compared with conventional ones, this light receiving device is of a relatively simple structure with an increased aperture ratio and excellent in S/N ratio.

REFERENCES:
patent: 4961096 (1990-10-01), Idesawa
patent: 5514887 (1996-05-01), Hokari
patent: 5856667 (1999-01-01), Spirig et al.
patent: 6087703 (2000-07-01), Ohta et al.
patent: 197 04 496 (1998-03-01), None
patent: 1 243 944 (2002-09-01), None
patent: WO 03/085413 (2003-10-01), None
S. M. Sze, “Physics of Semicondcutor Devices Second Edition”, Central Book Company, 1981.

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