Display device, multi-display device including the same, and method for driving the same

摘要

A display device is provided. The display device includes a display panel, a backlight unit, and a luminance comparison unit. The backlight unit is configured to supply light to the display panel. The luminance comparison unit is configured to compare a measured luminance of the display panel with a reference luminance range. The backlight unit includes a light source unit, a DC-DC converter, and a driving current controller. The DC-DC converter is configured to supply a driving voltage to the light source unit, and the driving current controller is configured to control a driving current flowing to the light source unit based on the comparison result of the luminance comparison unit.

主权项

1. A display device, comprising:
a display panel; a backlight unit configured to supply light to the display panel; and a luminance comparison unit configured to compare a measured luminance of the display panel with a reference luminance range, wherein the backlight unit includes: a light source unit; a DC-DC converter directly connected to a first port of the light source unit and not directly connected to a second port of the light source unit, and configured to supply a driving voltage to the light source unit through the first port; and a driving current controller connected to the second port of the light source unit, and configured to control a driving current flowing to the second port of the light source unit based on the comparison result of the luminance comparison unit, wherein the driving current controller includes: a plurality of resistors connected to a reference voltage terminal of an integrated circuit (IC) chip; and a plurality of coupling members connected to the plurality of resistors, respectively, and to an output current terminal of the IC chip, wherein the plurality of coupling members is configured to control connection states of the resistors.