公开(公告)号：US20100109547A1

公开(公告)日：2010-05-06

申请号：US12437692

申请日：2009-05-08

申请人： Yu Jin JANG ,  Byoung own Min ,  Jung Chul Gong ,  Sang Cheol Shin ,  Jeong In Cheon

发明人： Yu Jin JANG ,  Byoung own Min ,  Jung Chul Gong ,  Sang Cheol Shin ,  Jeong In Cheon

IPC分类号： H05B41/292

CPC分类号： H05B41/2855

摘要： Disclosed is a liquid crystal display (LCD) backlight inverter. The LCD backlight inverter includes a lamp open detection unit outputting a first open detection voltage for a preset time period when it is determined that a predetermined lamp is open, based on a current voltage corresponding to the current of the predetermined lamp of a plurality of lamps, a first open determination unit outputting an open detection signal when the first open detection voltage is input, a second open determination unit outputting a protection signal when it is determined that all of the plurality of lamps are open based on detection voltages of the plurality of lamps, a temporary protection determination unit outputting a frequency change signal when both the open detection signal and the protection signal are input, and an operating frequency control unit changing an operating frequency to a preset protective frequency according to the frequency change.

摘要翻译： 公开了一种液晶显示（LCD）背光逆变器。 LCD背光逆变器包括：灯开路检测单元，基于与多个灯的预定灯的电流相对应的电流电压，当确定预定灯打开时，将预定时间段的第一开路检测电压输出 第一开路判定单元，当输入第一开路检测电压时，输出开路检测信号;第二开路判定单元，基于多个灯的检测电压确定多个灯全部断开时，输出保护信号 灯，当输入开放检测信号和保护信号时输出频率变化信号的临时保护判定单元，以及根据频率变化将工作频率改变为预设保护频率的工作频率控制单元。