Because liquid crystal molecule has anisotropic dielectric constant at liquid crystal display (LCD)

the tilting angle of liquid crystal molecule changes with the loading signal voltage

leading to the changing of capacitor value . The paper uses 2DMOS simulation software to simulate the coupling capacitor

C

pd

which is consisted of data line and close pixel electrode

and emphatically studies the mechanism and influence trend of dielectric constant on the right and left coupling capacitor

C

pd

. From the simulation result

the left coupling capacitor

C

pd

is mostly influenced by the electric field of liquid crystal layer

the right coupling capacitor

C

pd

is mostly influenced by the electric field of right coupling capacitor

C

pd

. Due to the most part of total coupling capacitor being right coupling capacitor

C

pd

so we can decrease the value of right coupling capacitor to decrease the value of total coupling capacitor

C

pd

.