Technicians install Sony's 4k Ultra HD television at the Sony booth at the International Consumer Electronics Show in Las Vegas, Monday, Jan. 7, 2013. The 2013 International CES gadget show, the biggest trade show in the Americas, is taking place in Las Vegas this week. (AP Photo/Jae C. Hong)
Sharp Electronics vice president for strategic product marketing Jim Sanduski, introduces the ICC Purios Ultra HD resolution Panel at a news conference during press day at the Consumer Electronics Show, Monday, Jan. 7, 2013, in Las Vegas. (AP Photo/Julie Jacobson)
Sharp Electronics vice president for strategic product marketing Jim Sanduski, introduces Sharp's 4K Aquos Ultra HD flat screen tv during a news conference at the Consumer Electronics Show press day, Monday, Jan. 7, 2013, in Las Vegas. (AP Photo/Julie Jacobson)
John Herrington, President of Sharp Electronics Marketing Company of America, talks about Sharp's 2013 large screen Aquos line of tv's during press day at the Consumer Electronics Show, Monday, Jan. 7, 2013, in Las Vegas. (AP Photo/Julie Jacobson)
Las Vegas Convention Center exhibit contractors enter the North Hall while setting up spaces for the International Consumer Electronics Show, Sunday, Jan. 6, 2013, in Las Vegas. The show, which drew more than 3,100 consumer electronics exhibitors in 2012 and is open only to industry affiliates, begins Tuesday and runs through Friday. (AP Photo/Julie Jacobson)
Sharp Electronics vice president for strategic product marketing Jim Sanduski, talks about Sharp's various lines of large screen tv's during press day at the Consumer Electronics Show, Monday, Jan. 7, 2013, in Las Vegas. (AP Photo/Julie Jacobson)
Jung Jin Bae, of South Korea, tests a motion sensor at the LG booth at the International Consumer Electronics Show in Las Vegas, Monday, Jan. 7, 2013. The 2013 International CES gadget show, the biggest trade show in the Americas, is taking place in Las Vegas this week. (AP Photo/Jae C. Hong)
LAS VEGAS — The race to make TVs larger and larger has created a colossal problem for manufacturers: As screens grow, picture quality worsens — unless the viewer moves farther away from the screen. The issue is playing out in cozy dens and family rooms …