Display device

An image display device comprising:

• an auxiliary line image storage means having pre-stored data about an auxiliary line image with a plurality of shapes;
• an OSD (On Screen Display) circuit part displaying the auxiliary lines;
• an image synthesis circuit weighting auxiliary line image data that are output from the OSD (On Screen Display) circuit part and display image data;
• an auxiliary line image display control part reading out auxiliary line image data from the auxiliary line image storage means, setting said auxiliary line image data in the OSD circuit part, and controlling, so as to make be displayed, the desired auxiliary line image from the OSD circuit part;
• and
• a means displaying the image;
• wherein:
• the auxiliary lines are displayed weighted in the display image;
• the auxiliary lines are constituted by dashes;
• and
• the display of the dashes is carried out so as to move, at fixed time intervals or arbitrary time intervals, the dash display areas of said auxiliary lines on the trajectory of the figure described by said auxiliary lines.

An image display device comprising:

• a frame memory developing a prescribed auxiliary line image as a display image and a means of reading out and displaying the image data developed in said frame memory;
• and
• wherein:
• said auxiliary line image is constituted by background color and dashed auxiliary lines having pixels which have luminance or color that is different from that of the background color and pixels with have nearly identical luminance or color to that of the background color;
• and,
• with respect to an arbitrary position of the lines described by said auxiliary lines, said auxiliary line image is displayed with dashes by displaying said dash display areas, at arbitrary time intervals.

An image display device, comprising:

• an auxiliary line image storage means having pre-stored data about an auxiliary line image with a plurality of shapes;
• an OSD (On Screen Display) circuit part displaying the auxiliary lines;
• an image synthesis circuit weighting auxiliary line image data that are output from the OSD (On Screen Display) circuit part and display image data;
• an auxiliary line image display control part reading out auxiliary line image data from the auxiliary line image storage means, setting said auxiliary line image data in the OSD circuit part, and controlling, so as to make be displayed, the desired auxiliary line image from the OSD circuit part;
• and
• a display means displaying the image;
• and
• wherein:
• the auxiliary line is displayed weighted in the display image;
• the auxiliary line is constituted by dashes and, with respect to an arbitrary position of the line described by said auxiliary line, is displayed with dashes at arbitrary time intervals by displaying said dash display areas.