LAS VEGAS—The world’s top television makers will this year peddle sets that enhance the color representation of their screens, but postpone a more dramatic shift in technology that promised thinner frames, more energy efficiency and crisper images.

New TVs and prototypes featuring “quantum dot” technology from manufacturers in South Korea, China and Japan took center stage at the Consumer Electronics Show in Las Vegas last week, where companies including Samsung Electronics Co. and LG ElectronicsInc. showed off videos with vibrant color.

Comment