| 摘要 |
A power supply device of an OCB(Optically Compensated Birefringence) LCD(Liquid Crystal Display) panel is provided to produce the power for the transition driving from the output of a power generating member for the back light. A back light power generating member(510) generates the back light power for driving the back light. A transition voltage generating member(530) receives the back light power and generates the transition voltage. A switching member(520) is located between the back light power generation member and the transition voltage generation member and selects the generation of the transition voltage on the basis of a selection signal inputted from the outside. The back light power generating member converts the voltage level of the input power inputted from the outside, generates the back light power and includes a DC-DC converter for converting the first level direct voltage into the second level direct voltage. |
