PICTURE DISPLAY SYSTEM OF INFRARED-RAY IMAGING APPARATUS

PURPOSE:To perform accurate diagnosis, by providing circuits, which divide and control a display screen, displaying a color picture and a black and white picture, and making it possible to observe the partial temperature change and the distribution of the equal temperature region simultaneously on one screen. CONSTITUTION:A display circuit is composed of an optical scanning system 11, an infrared-ray detector 13, a picture memory 16, a scanning and driving system 17, a synchronization detector 18, a dividing and controlling circuit 19, a memory control circuit 20, a synchronizing signal generating circuit 21, a black and white linear conversion circuit 23, a color step conversion circuit 24, a signal switching circuit 25, a second dividing and controlling circuit 26 and the like. In this constitution, a display screen 2 of a color cathode ray tube 1 of the display apparatus is divided into two right and left display screens 2a and 2b. On the screen 2a, the temperature pattern of an object is displayed as a black and white variable-density picture 3a. On the screen 2b, a color step picture 3b is displayed. Therefore, accurate observation can be performed on one screen.