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3.冷阴极荧光灯管的亮度控制液晶电视也应该和CRT(显像管)电视一样能进行亮度控制,但是CCFL(冷阴极荧光灯)特有的非线性特性,导致用普通改变电压控制电流的亮度控制方法无法奏效。虽然增大灯管电流可增加亮度,但作用有限,且过大的电流会使灯管的电极受到损害,进而导致灯管的寿命缩短;同样,减小电流对亮度减小的作用也极其有限,且会使放电难以维持而导致灯管熄灭,弱电流放电对灯管的寿命也十分不利。
3. Brightness Control of CCFLs LCDs should also have the same brightness control as CRTs (CRT TVs). However, the CCFL (Cold Cathode Fluorescent Lamp) peculiar non-linearity can not be controlled by the usual method of controlling the brightness of the lamp Effective. Although increasing the lamp current can increase the brightness, but the effect is limited, and too large current will damage the lamp electrode, which leads to the shortened life of the lamp; the same, reduce the current brightness reduction is also extremely limited role , And will make it difficult to maintain the discharge led to extinguish the lamp, weak current discharge of the lamp life is also very unfavorable.