Patent №
US 5,293,238
Granted
1994-03-08
Filed 1992
Owner
HITACHI, LTD.
Lab
—
AI components
1
vision
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
07899250
Flicker which occurs when a television camera images an object under illumination of a flickering light source such as fluorescent lamp is minimized without causing sensitivity of a photoelectric conversion element and hence the camera to be degraded under a non-flickering light source. The television camera includes an automatic iris control device, an automatic gain control circuit, a microcomputer, a photoelectric conversion element and an integration circuit for integrating output signal of the photoelectric conversion element for each field period. The microcomputer sets a signal storage time of the photoelectric conversion element to a value by which flicker noise can be restricted when flicker is detected on the basis of a change of an output signal of the integration circuit and sets it to another value when a change of light source is detected on the basis of a change of iris value and gain.
AI classification
Ownership
HITACHI, LTD.
assignment · 61800435
Assignors
NAKANO, TAKAHIRO, IMAIDE, TAKUYA
On an employer assignment, the assignors are typically the inventors.