Ultrasonic imaging system and display device

An ultrasonic imaging system comprising:

• imaging means for transmitting ultrasonic waves and for producing images of a subject according to received echos of said ultrasonic waves;
• main display means for displaying said images of said subject;
• and
• auxilliary display means for displaying, concurrently with dispay of said images of said subject, images of information for operating said system;
• wherein
• said auxilliary display means comprises:
• an LCD for radiating lights of differing brightnesses and hues which are emitted from behind forwards through a liquid crystal matrix controllable to provide different brightnesses and hues at each pixel location thereby to display said images of said information at a selected brightness or hue;
• first memory means for storing first data based on which a predetermined image of said information of a particular brightness or hue is displayed on said LCD;
• second memory means for storing second data based on which the same predetermined image of said information is displayed on said LCD but with a brightness or hue which is different from said particular brightness or hue;
• and
• selecting means for providing to said LCD either said first data so as to cause said LCD to display said predetermined image of said information of a particular brightness or hue or said second data so as to cause said LCD to display said predetermined image of said information of said different brightness or hue;
• whereby said auxilliary display means displays said predetermined image of said information of desired brightness or hue concurrently with display of said image of said subject on said main display means.