Patent ID: 7916119
Filing Date: 2011-03-29
Classification: G09G

Abstract:
1. An inverter for a liquid crystal display comprising: a DC/AC converting unit that converts DC power supplied from a voltage source into AC power; a transformer that converts the AC power supplied from the DC/AC converting unit into a high voltage AC; and a frequency controller that is connected to the DC/AC converting unit to control the frequency of an output of the DC/AC converting unit such that the output of the DC/AC converting unit has an initial driving frequency during an initial driving time when initiating driving of a liquid crystal panel and such that the output of the DC/AC converting unit has a normal driving frequency larger than the initial driving frequency after the initial driving time, wherein the frequency controller includes: a first resistor having one end connected with a power source voltage; a first capacitor formed between the other end of the first resistor and a ground potential source: a transistor having a base connected to a node between the first resistor and the first capacitor and an emitter connected the ground potential source; a second resistor connected between a collector of the transistor and a first input terminal of the DC/AC converting unit; and a third resistor having one end connected with the first input terminal of the DC/AC converting unit and the other end connected with a ground potential source, wherein the transistor upon turning on connects the third resistor in parallel with the second resistor.