LED Backlight has replaced CCFL backlight because the thermal problem has been solved
The power consumption of LED backlight is much lower than CCFL backlight’s in the same amount of brightness. For example: the power consumption of 12 inch LED backlight laptop computer is less than 3 watt, but traditional CCFL backlight’s is between 3.5-4 watt. The power consumption of laptop computer not only determines the performance of the laptop computer and the lifespan of the battery but also affects the thermal problem and the reliability problem of the laptop computer which are the most critical issues. The thermal problem and the reliability problem are closely connected. If the thermal problem is perfectly solved, the reliability increases a lot. The thermal problem is the most critical technical obstacle in developing LED backlight at the present stage. Though some backlight manufacturers repeat that the thermal problem has been solved, the reliability only can be tested by the time.
Finding an acceptable cost to solve the thermal problem at the present stage is the main direction, at the same time the reliability must be considered. If the thermal problem is solved, LED backlight will replace CCFL backlight immediately. Besides, the laptop computers which adopt LED backlight are much thinner so that they can meet people’s fashion sense.
We are not saying that LED as the green and environment-friendly light source is perfect. In fact, there are several aspects of LED light source is less perfect such as the overall cost and color saturation. With the development of technology, the overall cost is going to be lower and the color saturation is getting better. But so far, the color saturation of white LED lamp is lesser than CCFL’s. The LED lamp with RGB triple chips which emits white light is neither too big nor too little brightness. If RGB three individual LED lamps to emit white lights by mixing lights together, the brightness will decrease while the temperature of the main board goes up. For example, the red LED lamp is the most affected by the temperature. Therefore, the thermal problem is the most urgent problem to be solved in technology. We can see the following image explanation.