LIQUID CRYSTAL DISPLAY DEVICE

摘要

PURPOSE: A liquid crystal display device is provided to improve an image quality by partly controlling the brightness of a black light by a light emitting diode unit. CONSTITUTION: A plurality of light emitting diodes are arranged in the lower part of an LCD panel and is mounted in a first printed circuit board. A current mirror circuit is mounted in the second printed circuit board which is connected to the first printed circuit board and is connected to the light emitting diodes respectively. A switching circuit(SWC) is connected to the current mirror circuit. A light-emitting data wiring(LDL) is connected to the switching circuit and transmits a scan wire and a light emitting current. The current mirror responded to the input light emitting data current and outputs the light emitting current to the light emitting diodes.