VIDEO DISPLAY APPARATUS AND VIDEO DISPLAY METHOD

摘要

An APL determining block (2) determines the APL of an input video signal (1) for each unit field period. In a light source control data creation block (3), when the APL is between 0% and a predetermined value A1, a light source control signal of the minimum level capable of stable drive of a light source (6) is generated. When the APL is between a predetermined value A2 and 100%, a light source control signal of the maximum level capable of stable drive of the light source (6) is generated. When the APL is between the predetermined value A1 and the predetermined value A2, a light source control signal is so generated as to dynamically vary in accordance with the APL. By driving the light source (6) in accordance with the light source control signal, it is possible to cope with problems of insufficient contrast and bloating black and to improve the reliability of the light source (6).