DURHAM, N.H. -- New consumer research from Leichtman Research Group, Inc. (LRG) found that 75% of households in the United States have at least one high definition television (HDTV) set – up from 23% five years ago. Over the past five years, 52% of US households adopted HDTV.In addition, 51% of HDTV households have more than one HDTV, compared to 22% five years ago. Overall, about 38% of all US households now have multiple HDTV sets – up from about 26% of two years ago, and 5% all households five years ago. About 59% of TV sets in HD households are HDTVs.These findings are based on a survey of 1,252 households throughout the United States, and are part of a new LRG study, HDTV and 3D TV X. This is LRG’s tenth annual study related to HDTV. Leichtman Research Group Inc. (LRG)