Patent ID: 9190004
Filing Date: 2015-11-17
Classification: G02F,G09G

Abstract:
1. A liquid crystal display device comprising: at least one sensor module configured to sense an amount of external light; a liquid crystal display panel configured to display images; at least one light source module disposed under the liquid crystal display panel and configured to emit light; and at least one light guide plate configured to convert light from the at least one light source module into two-dimensional light and apply two-dimensional light to the liquid crystal display panel, wherein the at least one light source module includes infrared LEDs and visible LEDs which are selectively driven according to a sensed light quantity sensed by the at least one sensor module and allow infrared light and visible light to be selectively emitted, wherein the at least one light source module includes a first PCB (printed circuit board) having the visible LEDs and a second PCB having a plurality of protrusive regions, wherein the visible LEDs are disposed on the first PCB and the infrared LEDs are disposed on the protrusive regions of the second PCB, wherein the second PCB is attached on the first PCB and the protrusive regions are each disposed between the visible LEDs, and wherein the sum of thicknesses of the infrared LED and the second PCB is the same as the thickness of the visible LED.