Projection type image-displaying system, projection type image-displaying apparatus, and lamp lighting-controlling method

A projection type image-displaying apparatus, comprising:

• a disk-like color wheel constituting a plurality of color filters including a plurality of color segments for transmitting lights having colors different from one another, respectively;
• a lamp for radiating a light to the disk-like color wheel, thereby generating lights having transmission colors corresponding to the plurality of color filters, respectively;
• a lamp-controlling portion for superimposing a pulse current on a driving current for the lamp for a period of time for which the light is radiated from the lamp to one selected among the plurality of color filters;
• an optical modulation portion for being driven in accordance with image signals to reflect the lights transmitted through the plurality of color filters, respectively, in accordance with the image signals, thereby generating the image lights;
• and
• a control portion for causing an image adjustment menu to be projected on the screen in accordance with a user manipulation, the image adjustment menu having set contents to vary the superimposition of the pulse current on the driving current in correspondence to the image signals.

A lamp lighting-controlling method, comprising:

• visually observing image lights projected from a projection type image-displaying apparatus on a projection surface of a screen;
• reading out a menu to adjust brightness or color purity of the image lights by manipulating the projection type image-displaying apparatus;
• setting an adjustment amount corresponding to the brightness or the color purity in accordance with the manipulation of a main body manipulation portion provided on the projection type image-displaying apparatus or a remote controller by looking at the adjustment amount for the brightness or the color purity to be indicated in the menu;
• and
• superimposing a pulse current on a driving current for a lamp for radiating a light to a disk-like color wheel in accordance with an input manipulation using the main body manipulation portion or the remote controller, the disk-like color wheel constituting a plurality of color filters including a plurality of color segments, respectively.