Display device, inverter apparatus and method of driving lamps

摘要

A display device including two or more lamp groups, each having one or more lamps, includes a driving control signal generating unit and an inverter unit. The driving control signal generating unit generates driving control signals to control the driving of at least one of the two or more lamp groups. The inverter apparatus includes two or more inverter circuits configured to receive the driving control signals. In the display device, each of the two or more inverter circuits sets the operation frequency of a corresponding lamp group based on the driving control signals, and generates an operation voltage for the corresponding lamp group according to the set operation frequency.

主权项

1. An inverter apparatus configured to individually supply an operation voltage to first and second lamp groups included in a display device, the inverter apparatus comprising:
a first inverter circuit configured to receive a driving voltage signal from the outside and first and second scanning control signals for controlling the first and second lamp groups to turn on and off, and to output a first operation voltage signal for a first operation frequency associated with the first scanning control signal, the first inverter including:
a first power converting unit configured to convert the driving voltage signal into the first operation voltage signal based on the first operation frequency which is determined in response to a change in a resonance frequency, wherein the resonance frequency changes based on a number of the first and second lamp groups turned on; anda first transformer configured to transform the first operation voltage signal into an operation voltage for controlling the first lamp group to turn on and off; and a second inverter circuit configured to receive the driving voltage signal and the first and second scanning control signals, and to output a second operation voltage signal for a second operation frequency associated with the second scanning control signal,
a second power converting unit configured to convert the driving voltage signal into the second operation voltage signal based on the second operation frequency which is determined in response to the change in the resonance frequency; anda second transformer configured to transform the second operation voltage signal into an operation voltage for controlling the second lamp group to turn on and off, wherein the first operation frequency for the first lamp group is decreased to a predetermined value in response to the change in the resonance frequency when the first and second lamp groups are set to be in an on-state simultaneously in response to the first and second scanning control signals.