An adjustable holder for an electronic device includes four pivotally attached telescopic arms. Subsequently, a back cover is laminated on the coated substrate with an adhesive film. The catalyst is circulated between the first reactor and the second reactor by injecting the catalyst cooled in the second reactor into the first rector. In another exemplary embodiment, the system and method have the capability of backing up the process to transmit previously skipped packets, if time allows. The content of the fine particle in the layer B is 0. More particularly, embodiments relate to a backlight device for a display which utilizes an array of LED pairs to create a desired chromaticity and luminance of light, whereby the chromaticity and luminance can be closely monitored and maintained throughout the life of the display.