The secret behind the exquisite, film-like picture quality with 15,000:1 native contrast ratio lies in the innovative D-ILA device technology, the optical engine and the fact the DLA-HD1 projector does not rely on iris control. Conventional front projectors use an iris control to boost contrast ratio. With such projectors, picture resolution may be excellent, but the picture lacks good contrast. Here you can see the difference between a conventional projector with iris control and JVC DLA-HD1.
Conventional D-ILA devices suffer from surface unevenness, minute gaps and irregularities that are unavoidable using normal semiconductor manufacturing processes. Discontinuities between individual pixel cells or where the pixel cells are connected with the underlying semiconductor structure disturb the orientation of the liquid crystals, and the resulting diffraction and other effects lead to stray light. In the manufacture of this newly developed device, technology has been adopted to ensure extreme planarization; this reduces to an absolute minimum such stray light.
Moreover, as a result of employing new liquid crystal materials and orientation technologies, the gap between pixel cells has been optimised, reducing it from the previous 3.2 microns to 2.3 microns, cutting light loss from the liquid crystal layer itself, and significantly improving compensation accuracy. Such new technologies have realized the extremely high device contrast ratio of 20,000:1, and at the same time halved response time from 8msec (Tr+Td) to 4msec.
JVC original D-ILA pulse drive produces clear, high-precision gradations without employing error diffusion. High-precision calibration technology enables the faithful reproduction of dark pictures, in which luminance is 10% or less, so that the blacks can still be differentiated, thus resulting in pictures with appreciable texture.
Using a conventional PBS (Polarizing Beam Splitter), comprised of a glass prism with multilayer interference film, optical properties can vary considerably depending on the angle of the incident light beam; this makes it difficult to realise high contrast.
However, the wire grid design employed for JVC newly developed optical engine uses an inorganic reflective polarizing plate made from a glass substrate on the surface of which are ultra-fine aluminium ribs. This reduces to an absolute minimum the amount of stray light reaching the lens. The combination of this polarizer with the newly developed D-ILA device increases contrast by a factor of 5.
The GF9351 video processor made by Gennum Corporation ensures the faithful reproduction of high-quality images thanks to a high-precision scaling function and four VXP™ technologies -- FineEdge™, FidelityEngine™, TruMotionHD and RealityExpansion™.
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FineEdge™
Edge correction technology that gets rid of the jaggy artifacts that can affect diagonal lines, creating instead smooth outlines. -
FidelityEngine™
Imaging technology that improves detail while reducing noise. This technology ensures a clear, detailed picture even when using video sources with lower resolutions. -
TruMotionHD™
De-interlacing technology that supports HD signals (1080i), converting them to high-quality 1080p signals for playback. -
RealityExpansion™
10-bit image processing technology. This technology can upsample 4:2:2 (Y:Cb:Cr) video signals to the 4:4:4 format; it delivers outstanding image processing at a level comparable to that of broadcast masters.
* VXP and Visual Excellence Processing are trademarks of Gennum Corporation.