Pheux
Power Member
Será que estaremos perante o fim dos painéis VA? 
http://www.avsforum.com/new-panasonic-ips-lcd-panel-claims-1m1-native-contrast-ratio/
Por esta ninguém esperava. Nem eu.
Poderá este ser o grande regresso da Panasonic? Esperemos que sim!
As most AVS Forum members know, LCD TVs use one of two basic types of LCD panels: IPS (in-plane switching) and VA (vertically aligned). IPS panels typically offer a wider viewing angle with less off-axis loss of contrast and color saturation, while VA panels offer deeper blacks and thus greater contrast when viewed on axis.
That could soon change with Panasonic’s recent announcement that it has developed a new IPS panel with a claimed native contrast ratio of 1,000,000:1! Crucially, that’s not a bogus “dynamic” contrast ratio based on backlight modulation; it’s a static ratio, which normally reaches only as high as 2000:1 in a typical IPS panel.
How is this possible? The new panel adds a special layer of light-modulating cells between the backlight and imaging cells. The light-modulating cells are used as gates to let more or less light through to the imaging or “display” cells.
Panasonic’s new IPS panel uses a layer of light-modulating cells between the backlight and display cells to deepen the blacks on a per-subpixel basis.
Granted, that’s what the imaging cells do in the first place, but they don’t do it perfectly—some light always leaks through, which is why LCD panels have a tough time achieving deep blacks on their own. Full-array local-dimming (FALD) LED backlights can help by dimming the LEDs behind dark portions of the image, but the number of local-dimming zones is far less than the number of pixels, resulting in the possibility of blooming or haloing around bright objects on a dark background.
By contrast, the new Panasonic IPS panel uses two gates per subpixel—the imaging cells and the new light-modulating cells—allowing much greater control of each one’s brightness individually. This brings the contrast capabilities of the new panel closer than ever to OLED, which directly controls the brightness of each subpixel’s emitted light independently.
According to the press release, “The light-modulating cells are composed of a liquid-crystal material that differs in light-transmission properties from that used in the display cells, allowing independent control of the display and light-modulating cells. This has reduced light leakage significantly, allowing finely tuned gradation expression. Furthermore, the application of Panasonic’s IPS liquid crystal technologies, developed for industrial use, has achieved a contrast of 1,000,000:1 (maximum brightness: 1000 nits, minimum brightness: 0.001 nit) while maintaining features including wide viewing angles and high light-transmission efficiency.”
The press release goes on to say, “The new high-contrast IPS panel achieves a maximum brightness of 1000 nits by enhancing the transmittance of the display and light-modulating cells and adopting a high-brightness backlight. For the light-modulating cells, the company has developed a light-tolerant material that provides stable operation over a long period of time, despite exposure to intense light from the high-brightness backlight, as well as a unique cell structure.” Even better, the new panel can be manufactured in screen sizes up to 100″ using existing facilities.
The first applications envisioned for the new Panasonic IPS LCD panel include high dynamic-range (HDR) displays for broadcast and video-production studios as well as medical and automotive monitors. But of course, I’m most excited about the possibility of consumer TVs based on the new technology, which could give OLED a real run for its money.
http://www.avsforum.com/new-panasonic-ips-lcd-panel-claims-1m1-native-contrast-ratio/
Por esta ninguém esperava. Nem eu.
Poderá este ser o grande regresso da Panasonic? Esperemos que sim!
