Two types of notebook LED backlights exist: slim and wedge type. Both use different light guide plate (LGP) technology from traditional designs. The slim format reduces the panel thickness to 3.0-3.6 mm, while the wedge type is in the 5.2-5.8 mm range. Despite this, slim LED backlights for notebook PCs require higher quality and thinner components, such as LED array and LGP, compared to the wedge type.

“There has been limited availability of slim LED backlights as a result of limited yield rates of the light guide plates,” noted Anita Huang, DisplaySearch analyst for notebook PCs and panels in Taiwan. “The $5 cost premium of slim type panels and the difficult assembly as a result of the fragility and thin form factor have presented challenges.”

Huang added, “Despite the higher cost and assembly issues, the slim type will continue to grow as a result of notebook manufacturer priorities for slimmer form factors over cost premiums. As the yield rate improves, and the economies of scale for the slim type grow, we expect that the slim type premium will be reduced.”

“For 10.1", 11.6", and particularly 13.3" wide panels, slim type LED backlights have been widely used for CULV notebook PC models.” Huang added, “The merits of slim type, such as the thinness and light weight, can be easily felt and seen in sizes smaller than 14”. However, the CULV notebook PC sales have been disappointing for brands. To create a differentiated market segment, some panel makers are promoting a full product lineup of slim type notebook panels this year and are trying to shrink the panel price gap between slim and wedge as the slim volume increases.”

In Q1'10, only 6.6% of the LCD monitor panels shipped had LED backlights. In LCD TV, the penetration of LED backlights soared from 3.8% to 9.3% in Q1'10. LCD TV panel makers are aggressively targeting a 36% LED penetration in Q4'10, while currently there are still some challenges happening in the LED backlight supply chain.

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