Image display apparatus for fixing luminance of blank area and varying only luminance of image

A method of displaying an image comprising:

• converting an input analog image signal into digital image data;
• adjusting a lower-limit reference voltage of the digital image data to thereby adjust a first black level of the digital image data;
• generating blank data for display in a blank area around an image display area in which a second black level of the blank data is independent of the first black level of the digital image data;
• combining the blank data and the digital image data;
• and
• displaying the digital image data in the image display area and the blank data in the blank area of a display screen.

A method of displaying an image comprising:

• converting an input analog image signal into digital image data;
• adjusting a lower-limit reference voltage of the digital image data to thereby set a first black level of the digital image data;
• generating blank data for display in a blank area around an image display area in which a second black level of the blank data is independent of the first black level of the image display data;
• combining the blank data and the digital image data;
• and
• displaying the combination of the blank data and the digital image data on a screen.