JVC Demonstrates Projector Achieving 10,000:10,000 Contrast Ratio without Using Aperture

Sep 25, 2006
Satoshi Ookubo, Nikkei Electronics
JVC's latest projector
JVC's latest projector
[Click to enlarge image]

At the "A and V Festa 2006" event, Victor Company of Japan, Ltd. (JVC) has presented a prototype front projector that achieves 10,000:10,000 contrast ratio in a dark environment without using an aperture (iris). By revising lens and other optical designs, the company realized the high full on/off contrast ratio. JVC prepared a dark room assumed as a home theater room and emphasized its development's higher picture quality and, in particular, improved "black reproduction" aimed at preventing black from showing gray, in comparison with the company's current product inside the room.

To achieve 10,000:10,000 contrast ratio, manufacturers have needed to set an iris between the light source and LCD panel thus far. Previous products controlled light amount by adjusting the iris' aperture in line with the brightness of a scene on the screen. The use of an iris allowed better black reproduction but reduced brightness of light areas in dark scenes. By achieving the 10,000:10,000 contrast ratio without using an iris, JVC succeeded in enhancing black reproduction of dark areas and brightness of light areas on the screen at the same time.

The prototype's beam of light reaches up to 800 lm. Power consumption is 200 W. The monitor uses three units of JVC's 0.7-inch "D-ILA" liquid crystal on silicon (LCOS) panels. The projector supports 1920 x 1080 full HD resolution and displays images at 1080p.