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Εχουμε ηδη κανει αναφορα στον νεο προβολεα της Sanyo,PLC-XP200L
o οποιος "ερχεται" με 4 LCD
ΠερισσοτεραSanyo has come up with what it believes is a unique and perfect solution. 4LCD builds upon standard 3LCD optical engines by improving color reproduction with something the company calls “QuaDrive.” The QuaDrive optical engine makes a noticeable difference in shades of color that contain yellow, and range from green to red. According to the company, its goal is to produce more photorealistic images.
Sanyo’s QuaDrive system (see image below) starts with a conventional 3LCD optical engine, which is comprised of a lamp, light integrators, three dichroic filters, three LCD panels, and a combining prism. Then, it adds a fourth, single pixel LCD panel to filter and pass yellow spectral energy as needed. Basically, 4LCD adds a Color Control Device to conventional 3LCD (red/green/blue) systems. In other words, the additional Color Control Device in the 4LCD optical engine allows a projector to automatically control the amount of yellow light in the image, producing higher luminosity with improved color accuracy and clarity. It works by slightly changing the spectral response of a conventional 3LCD engine. Sanyo’s new Color Control Device (the 4th LCD) panel gives the viewer shades of colors that are apparently closer to what is seen in the real world under natural daylight, which the manufacturer believes gives the viewer a more photorealistic image.
Reportedly, color gamut isn’t the only thing affected by adding the Color Control Device. According to Sanyo, image brightness also increases by as much as 20-percent, while image contrast remains about the same. It should also be noted that Sanyo’s QuaDrive system does not require a special projection lamp to achieve its goal. Conventional short-arc lamps used in other projectors will work just fine. According to the company, the lamp’s inherent spectral imbalance is corrected by the specially-tuned dichroic filters, which results in higher frequency response in greens and yellows.
http://www.electronichouse.com/article/first_look_at_sanyos_new_4lcd_projector/D1/