Samsung Electronics' Device eXperience division may receive an unexpected second-quarter boost after its Thank You Festival drove stronger-than-anticipated demand for appliances, TVs and mobile devices in Korea, industry sources said Sunday. The DX division encompasses Samsung's smartphones, TVs and home appliance businesses. Samsung initially allocated around 400 billion won ($262 million) worth of digital Onnuri gift certificates to the campaign, which ran from June 8 through Sunday, according