PURPOSE: To prevent the dirt by floating dust and the like in air on a transmission type screen, by providing a corona generation section in a TV receiver volume, making ionized air and neutralizing staticelectricity produced on the transmission type screen.

CONSTITUTION: Picture of a CRT 5 is reproduced on a transmission type screen 2 via a mirror 3 with an optical system 4. A corona generating section 6 is provided in volume consisting of the screen 2 and a console 1 of a transmission type projective TV device. Corona is produced at the section 6 and a part of gas moleculars in air is ionized. Thus if staticelectricity 2 is produced and charged, it is immediately neutralized with ions in air and the charged voltage approaches zero. Thus, floating dust in air can not be absorbed on the screen 2 with staticelectricity.