Back light apparatus and control method thereof

#This application claims priority from Korean Patent Application No. 2006-0121780, filed on Dec. 4, 2006 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.

#1. Field of Invention

#Apparatuses and methods consistent with the present invention relate to a back light apparatus and a control method thereof, and more particularly, to a back light apparatus which uses light emitting diodes (LEDs) of various colors as a light source, and a control method thereof

#The above and/or other aspects of the present invention will become apparent and more readily appreciated from the following description of the exemplary embodiments, taken in conjunction with the accompanying drawings, in which:

#FIG. 1 is a control block diagram of a liquid crystal display apparatus according to an exemplary embodiment of the present invention;

#FIG. 2 illustrates a configuration of a liquid crystal display apparatus according to an exemplary embodiment of the present invention;

#Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The exemplary embodiments are described below so as to explain the present invention by referring to the figures.

#As shown in FIG. 1, a liquid crystal display apparatus includes a liquid crystal display panel 100, a back light part 200, a driving part 300 and a controller 400. The liquid crystal display panel 100 includes a first substrate on which a switching element (not shown) and a pixel electrode (not shown) are formed; a second substrate on which a red color filter, a green color filter and a blue color filter are formed; and a liquid crystal between the first substrate and the second substrate. A signal from a panel driving part (not shown) is transmitted to the switching element through a Printed Circuit Board (PCB) provided on a source side of the first substrate and a PCB provided on a gate side thereof Then, the liquid crystal receives an electric signal so that the liquid crystal display panel 100 displays an image by penetrating or intercepting light from the back light part 200 (as described below) or by adjusting the amount of the light that penetrates therethrough.

#The back light part 200 includes a plurality of light emitting elements to emit the light of various colors. The light emitting element according to an exemplary embodiment includes a Light Emitting Diode (LED). Herein, the light emitting diode may includes a red LED (R LED) which emits the light of red color, a green LED (G LED) which emits the light of green color and a blue LED (B LED) which emits the light of blue color. The light source generates a white light by mixing the red light, the green light and the blue light and transmits the white light to the liquid crystal display panel 100.