Abstract: An optical wavelength conversion structure includes a substrate, a reflective layer, an oxide stack layer, and a wavelength conversion layer. The reflective layer is disposed on the substrate. The oxide stack layer is disposed on the reflective layer. The oxide stack layer has a gas barrier index of about 300-1000, and the gas barrier index is defined as ? i = 1 n ? L i ? d i 0 . 5 where L is a thickness, d is a density, and n is a number of layers. The wavelength conversion layer is disposed on the oxide stack layer.

Abstract: A system for projecting a displayed image of an electronic device through networking, applied to a conference room having at least one Wi-Fi AP, includes at least one electronic device, at least one USB flash drive and a receiving module. The electronic device further has a screen, a wireless network module and an identity. The USB flash drive is to store a pairing information and a network projection software. The receiving module further has an IP address. When the USB flash drive is connected with the electronic device, the electronic device captures the pairing information and uses the wireless network module to couple the at least one Wi-Fi AP, the electronic device further uses the pairing information to login the IP address of the receiving module, and then the electronic device uses the network projection software to output the displayed image to the receiving module.