Abstract: The present invention is a method and an apparatus for performing heating and sterilizing treatment on the inside of a PET bottle with a low heat resistance securely and without thermal deformation thereof, where a steam jetting nozzle is inserted into the bottle from a mouth portion thereof to jet steam from the nozzle, the steam is circulated inside the bottle to be exhausted from the mouth portion, the steam is caused to contact with a bottle inner face securely, and simultaneously cooling water is sprayed on an outer face of the bottle so that thermal deformation of the bottle wall face is prevented.

Abstract: A storage region for storing in advance information on contrast corresponding to an angle formed by an angle adjusting mechanism and a display screen is provided in advance. When adjustment of the information on contrast corresponding to one angle is made, a difference is determined between the information on contrast corresponding to the one angle and stored in advance in the storage region and adjusted information on contrast corresponding to the one angle, and the difference is added to the information on contrast corresponding to the remaining angles and stored in advance, thereby automatically adjusting the contrast corresponding to all the angles. Accordingly, as the user or the like only effects contrast adjustment for one angle, it becomes possible to automatically effect appropriate contrast adjustment and angle-of-visibility adjustment for all directions.