The first and second radiated luminance levels are different and have a combined radiated luminance corresponding to the luminance level for the pixel.

black bar luminance level

Thus, the uniformity of luminance is improved while maintaining the level of luminance.

A luminance adjustment slider allows the user to adjust the luminance of pixels from a selected luminance level by a relative amount.

A luminance overdrive quantity calculating circuit (3) calculates a luminance overdrive quantity (OD) based on the average luminance level (APL).

Pixels from other luminance levels have their luminance are affected in a manner proportional to a difference between the selected luminance level value and the luminance value of the other pixel.

An average luminance level calculating circuit (2) calculates an average luminance level (APL) of a video signal (VD).

A brightness range determining section (151) determines the upper limit and lower limit of the brightness of an LED on the basis of the average brightness level.

Then, the luminance level of the test signal before the A/D conversion is adjusted so that the luminance calculated by dividing the sum of the luminance values by the number of luminance values added may be a desired value.

The threshold value corresponds to a luminance level at which there is a generally linear relationship of luminance to code values.

Mixing of the colors is based on the luminance level of the image.

An ABL circuit (4) calculates a luminance limit quantity (BL) based on luminance limit characteristics, the average luminance level (APL) and the power consumption limit quantity (PL).

A luminance level control circuit (5) determines display drive conditions (BC) based on the luminance limit quantity (BL).

If it is determined that the luminance level of the ambient light is above a minimum ambient luminance threshold, an ambient black level may be calculated using the intensity of ambient light.

Finally, for each image patch, the original pixel brightness level of each pixel in the image patch is replaced with the blended pixel brightness level corresponding to that original brightness level (316).