Patent ID: 8711081

Claim:
A driving apparatus of a backlight module, adapted to a display device, the display device comprising a display panel and the backlight module for providing backlighting illumination to the display panel, the backlight module comprising a plurality of light emitting diodes, the driving apparatus comprising: at least one thermal sensor for only detecting a working temperature of the light emitting diodes, the working temperature being a temperature formed by heat generated from the light emitting diodes; an optical sensor for detecting brightness and color of the backlight module after a calibration function is enabled, so as to obtain difference values of the detected brightness and color with respect to predetermined brightness and color; and a processor provided with at least one initial thermal compensation table, wherein the processor is suitable for obtaining the working temperature and determining working currents of the light emitting diodes corresponding to the working temperature of the light emitting diodes according to the at least one initial thermal compensation table, and after the calibration function being enabled, the processor further for calibrating a content of the at least one initial thermal compensation table corresponding with a current working temperature of the light emitting diodes according to the difference values and storing the calibrated thermal compensation table as the at least one initial thermal compensation table, as a result of aging compensation of the light emitting diodes, wherein the current working temperature is the working temperature detected by the at least one thermal sensor when the optical sensor is detecting the brightness and color of the backlight module; wherein the backlight module further comprises a lamp board and a metal backplane, the light emitting diodes are arranged on the lamp board and at the front side of the lamp board, the metal backplane is disposed at the rear side of the lamp board, the optical sensor is mounted to the metal backplane rather than the lamp board, and the lamp board is formed with an opening to expose the optical sensor.