Liquid crystal display having particular ground structure
View Patent ↗An LCD comprising an LCD panel on which an electrode pad is provided; a light source irradiating light to a portion of the LCD panel; a bottom chassis accommodating the light source; a driving part connected to the electrode pad and applying a driving signal to the LCD panel; a driving circuit part controlling the driving part and comprising a first driving circuit board connected to the driving part and disposed on a lateral side of the bottom chassis and a second driving circuit board connected to the first driving circuit board and disposed on portion of the bottom chassis; and an FPC connecting the first driving circuit board to the second driving circuit board and comprising a ground member electrically connected to the bottom chassis, and exposed to the outside. Accordingly, the present invention provides a liquid crystal display decreasing an EMI level of the FPC.
1. An LCD comprising:
an LCD panel on which an electrode pad is provided;
a light source irradiating light to a portion of the LCD panel;
a bottom chassis accommodating the light source;
a driving part connected to the electrode pad and applying a driving signal to the LCD panel;
a driving circuit part controlling the driving part and comprising a first driving circuit board connected to the driving part and disposed on a lateral side of the bottom chassis and a second driving circuit board connected to the first driving circuit board and disposed on portion of the bottom chassis; and
an FPC connecting the first driving circuit board to the second driving circuit board and comprising a ground member electrically connected to the bottom chassis, and exposed to the outside.
2. The LCD according to claim 1 , wherein the FPC comprises an insulating film; a circuit wire and the ground member, which are formed on one side of the insulating film; a ground layer, which is conductive, formed on the other side of the insulating film; a coating layer formed on the circuit wire; and a plurality of contact holes connecting the ground member and the ground layer.
3. The LCD according to claim 2 , further comprising a gasket, which is conductive, connecting the ground wire and the bottom chassis.
4. The LCD according to claim 2 , wherein the ground member is formed substantially on the verge of the insulating film.
5. The LCD according to claim 2 , wherein the ground member is formed substantially in the center of the insulating film.
6. The LCD according to claim 1 , wherein the ground member directly contacts the bottom chassis.
7. The LCD according to claim 1 , wherein the bottom chassis comprises a projection facing the FPC and formed on an area of the bottom chassis corresponding to the ground member.
8. The LCD according to claim 1 , wherein the second driving circuit board comprises a ground part electrically connected to the bottom chassis and the ground member of the FPC is connected to the ground part.
9. The LCD according to claim 1 , wherein the ground part comprises a conductive substance.
10. The LCD according to claim 1 , wherein the second driving circuit board comprises a signal control part.
11. The LCD according to claim 1 , wherein the second driving circuit board comprises a driving voltage generating part and a gray-scale voltage generating part.
12. The LCD according to claim 1 , wherein the ground member comprises a wire.
13. The LCD according to claim 1 , further comprising a ground structure comprising the ground member and a ground part, the ground structure configured for reducing an EMI of the FPC when a voltage is applied through the FPC.
14. The LCD according to claim 1 , further comprising a circuit protecting board configured to protect the second driving circuit board.
15. The LCD according to claim 14 , wherein the circuit protecting board is further configured to intercept EMI generated in the second driving circuit board.
16. The LCD according to claim 1 , wherein the display panel comprises a TFT substrate;
a color filter substrate on the TFT substrate;
a polarizer on a surface of the color filter substrate and the TFT substrate;
a gate line and a data line formed on the TFT substrate;
wherein the driving part is connected to the gate line and the data line.
17. An FPC comprising an insulating film; a circuit wire and a ground member, which are formed on one side of the insulating film; a ground layer, which is conductive, formed on the other side of the insulating film; a coating layer formed on the circuit wire; and a plurality of contact holes connecting the ground member and the ground layer.
18. The FPC of claim 17 , further comprising a gasket such that a closed circuit is formed by connecting the ground layer, the contact hole, the ground member, the gasket, and the bottom chassis.