JID(Journal of information display) 11(1) 17-20 ISSN 1598-0316
Title: Improved Angle-of-View Measurement Method for Display Devices
http://img.kisti.re.kr/originalView/originalView.jsp?url=/soc_img/society//kids/HGJBCY/2010/v11n1/HGJBCY_2010_v11n1_17.pdf