Luminance compensation method

A luminance compensation method, comprising:

• according to a plurality of luminance values of a plurality of sampled display devices in each unit time during an initial start-up period, obtaining an average luminance value in each unit time and accordingly establishing a time-varying luminance sequence;
• according to a plurality of operating luminance values of the sampled display devices under a plurality of different driving condition values after the initial start-up period, obtaining an average operating luminance value under each driving condition value and accordingly establishing an operating luminance sequence;
• generating a driving condition value look-up table according to each driving condition value of the operating luminance sequence corresponding to each average luminance value of the time-varying luminance sequence in each unit time;
• and
• determining whether the average luminance value in each unit time during the initial start-up period is less than the average luminance value at ending of the initial start-up period;
• calculating a difference value between a driving condition value corresponding to a maximum average luminance value of the time-varying luminance sequence and a driving condition value corresponding to the average luminance value of the time-varying luminance sequence in the unit time according to the driving condition value look-up table, adding a driving condition value corresponding to a predetermined luminance value, obtaining a compensation driving condition value in the unit time, and accordingly generating a time-varying compensation sequence established under the compensation driving condition value in each unit time during the initial start-up period after compensation when the average luminance value in the time unit is less than the average luminance value at ending of the initial start-up period, such that a backlight module of a display device is driven according to the time-varying compensation sequence in each unit time during the initial start-up period to provide luminance corresponding to the predetermined luminance value.