VC HD-52Z575 Rear-Projection TV
By Ron Goldberg
While plasmas and other flat-panel displays gather all of the headlines in today's video market, rear-projection TVs (RPTVs) still command center stage in terms of overall sales and bang for the consumer buck. JVC has adapted the D-ILA technology it has long used in its pro-level front projectors into a line of HD-ready RPTV models that offer compelling alternatives in a world of me-too big-screen products.
The HD-52Z575 is a 52-inch widescreen set with a depth of about 16 inches. Its underlying technology is JVC's D-ILA (direct-drive image light amplifier), which is a variant of LCoS technology. While LCoS displays have shown great promise from a technical standpoint, progress so far on manufacturing that technology has been disappointing; several vendors have abandoned it in favor of more conventional LCD and DLP techniques.
JVC's HD-ILA is designed to offer the advantages of LCoS (brightness, resolution, pixel density) while also working past the manufacturing problems experienced by other vendors in terms of yields and quality control. Indeed, JVC has been successfully deploying D-ILA in one form or another for years now. More importantly from the end user's standpoint, HD-ILA is not affected by the color and timing artifacts common to the competing DLP sets that now dominate this category.
The three-chip system on the HD-52Z575 has a native resolution of 1280 x 720; all incoming signals are up- (or down-) converted to this layout. Several scaling options are available for wide and standard program material, and five specialized picture modes are also offered (though user presets are not supported). A (defeatable) four-point color management system samples red, green, blue and yellow in real time and adjusts them for maximum accuracy within their ranges, while a dynamic gamma control continuously monitors and adjusts the gradations in dark picture areas. Edge enhancement is performed by a technique called DSD, which JVC claims to be superior in a wider range of temporal screen action, from still to fast-moving.