Liquid crystal display device including a circuit board including an inverter with a driving circuit

Abstract

A liquid crystal display (LCD) comprising an LCD panel on which an electrode pad is provided; a driving part connected to the electrode pad and applying a driving signal to the LCD panel; a light source part providing light to a rear surface of the LCD panel; and a circuit board comprising a driving circuit part applying a driving control signal to the driving part and an inverter providing a light source driving voltage to the light source part. Accordingly, the LCD may improve work efficiency in a modular assembly process and decrease voltage overload of a voltage converter.

1 - 17 . (canceled) 
     
     
         18 . A liquid crystal display (LCD) device comprising:
 an LCD panel on which an electrode pad is provided;   a driving part connected to the electrode pad to apply a driving signal to the LCD panel;   a backlight unit including a light source part providing light to the LCD panel;   a voltage converter part receiving an inputted voltage to generate a driving circuit voltage and a light source driving voltage; and   a circuit board comprising a first unit receiving the driving circuit voltage and applying a driving control signal to the driving part, and a second unit receiving the light source driving voltage and providing a desired voltage to the light source part,   wherein the voltage converter part is coupled to the circuit board.   
     
     
         19 . The LCD device of  claim 18 , wherein the second unit is disposed to one side of the same circuit board where the first unit is provided. 
     
     
         20 . The LCD device of  claim 18 , further comprising a receiving unit accommodating the backlight unit. 
     
     
         21 . The LCD device of  claim 20 , wherein the circuit board is disposed on a rear surface of the receiving unit. 
     
     
         22 . The LCD device of  claim 21 , wherein the driving part is extended to the rear surface of the receiving unit. 
     
     
         23 . The LCD device of  claim 22 , wherein the circuit board is connected to one side of the driving part. 
     
     
         24 . The LCD device of  claim 18 , further comprising a light guiding plate disposed on the LCD panel,
 wherein the light source part is disposed along one side of the light guiding plate.   
     
     
         25 . The LCD device of  claim 18 , wherein the voltage converter part comprises a single voltage converter located on the circuit board. 
     
     
         26 . The LCD device of  claim 25 , wherein the voltage converter comprises a transformer converting a direct current voltage into an alternating current voltage. 
     
     
         27 . The LCD device of  claim 18 , wherein the voltage converter part comprises:
 a first voltage converter structured to convert voltages inputted from outside into a driving circuit voltage provided to the first unit; and   a second voltage converter structured to convert the voltage inputted from outside into the light source driving voltage provided to the second unit.   
     
     
         28 . The LCD device of  claim 27 , wherein the driving circuit voltage comprises at least one of a gate-on voltage, a gate-off voltage and a reference voltage. 
     
     
         29 . The LCD device of  claim 18 , wherein
 the light source part comprises a light source irradiating light to a rear surface of the LCD panel and wires connecting the light source and the second unit, respectively, and   the second unit generates the light source control signal to control and drive the light source part and has a connecting terminal connected to the wires.   
     
     
         30 . The LCD device of  claim 29 , wherein the connecting terminal is disposed on one edge of the circuit board. 
     
     
         31 . The LCD device of  claim 18 , wherein the light source driving voltage comprises an initial driving voltage turning on the light source part, a normal driving voltage applied to the light source part after the initial driving voltage is applied, and an excess driving voltage applied when the light source part is not driven by the initial driving voltage. 
     
     
         32 . The LCD device of  claim 18 , wherein the first unit and the second unit are respectively provided by the surface mount technology (SMT) on the same circuit board. 
     
     
         33 . The LCD device of  claim 18 , wherein a voltage-providing connector and the voltage converter are provided on the first unit, and the voltage converter converts voltages inputted through the voltage-providing connector into a gate-on voltage or a gate-off voltage. 
     
     
         34 . The LCD device of  claim 33 , wherein the driving circuit voltage comprises at least one of a gate-on voltage, a gate-off voltage and a reference voltage and is applied to the first unit. 
     
     
         35 . The LCD device of  claim 18 , wherein a voltage-providing connector and the voltage converter are provided on the second unit and the voltage converter coverts voltages inputted through the voltage-providing connector into a light driving voltage and a reference voltage, respectively. 
     
     
         36 . The LCD device of  claim 35 , wherein the reference voltage is applied to the first unit. 
     
     
         37 . The LCD device of  claim 18 , wherein a voltage-providing connector and the voltage converter are provided on the second unit, and the voltage converter converts voltages inputted through the voltage-providing connector into a driving circuit voltage and a light-providing voltage, respectively.