The present invention provides an image display device in which it is possible to obtain an image display of high brightness and high contrast by preventing the halation which may be generated in a peripheral portion of a display image. I at the surface of the photoconductor and I at the interface of the photoconductive layer on the support side are 5. The apparatus further includes a plurality of colored films selectively positionable into the slot and for assisting a user to differentiate a group of words in a line from a remainder of words in other lines. The preset invention enables sample preparation and handling for diagnostic assays and biochemical analysis in an array format, and the functional integration of these operations. The calibration execution unit executes the calibration upon receipt of the detection signal from the human body sensor.