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Hitachi to present 47-inch display with a contrast ratio of 8,000,000:1 at CEATEC Japan 2007


Hitachi Ltd. has developed a 47-inch display that boasts an enhanced dark room contrast ratio of 8,000,000:1. The display was realized through the adoption of Hitachi’s “hybrid monitor technology,” which combines an LCD panel and an LCD projector. The hybrid monitor technology uses a projector as a backlight system of an LCD panel. The 8,000,000:1 contrast was achieved through the multiplication of the LCD panel’s and projector’s contrast ratios. The display renders better gradation in dark scenes since both the LCD panel and the projector control gradation, according to Hitachi.


The Hitachi LCD panel is a so-called full HD model with a 1980 x 1080 resolution. The resolution of the LCD panel used as the projector is 1280 x 720. The panel surface luminance is 700 cd/m2 when displaying white.




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