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New iPad Display: Technology Shoot-Out

Posted March 19, 2012 at 7:28pm by iClarified · 12104 views
DisplayMate has published its 'New iPad Display: Technology Shoot-Out' taking a close look at the new display in Apple's latest tablet.

The report finds that the display on the new iPad decisively blows away all the tablets previously tested, including the iPad 2, Samsung Galaxy Tab 10.1, Barnes & Noble Nook Tablet, and Amazon Kindle Fire. The articles also finds that the iPad 2 display has recently slipped behind the Galaxy Tab and Nook Tablet.

Display Sharpness: As expected, all of the images, especially the text and graphics, were incredibly and impressively razor sharp. In some photographs, that extra sharpness made a significant difference, especially in close-ups and when fine detail like text was photographed.

Improved Color Saturation and Color Accuracy: A major shortcoming of the iPad 2 and iPhone 4 is their reduced Color Gamut, they only have 61-64 percent of the sRGB-Rec.709 Standard Color Gamut needed for accurate color reproduction. That produces images with noticeably under saturated colors, particularly reds, blues and purples. This is due to efficiency issues from the Backlight LEDs. Apple claims "44 percent greater color saturation." Technically it's not clear what that means in this context, but the new iPad has a virtually perfect 99 percent of the Standard Color Gamut (a 38 percent improvement over the iPad 2). The colors are beautiful and accurate due to very good factory calibration – they are also "more vibrant" but not excessively so or gaudy like some existing OLED displays. See the Conclusion below for our overall assessment and the screen shots for a side-by-side screen comparison.

Viewing Tests: What makes the new iPad really shine is its very accurate colors and picture quality. It's most likely better and more accurate than any display you own (unless it's a calibrated professional display). In fact with some minor calibration tweaks the new iPad would qualify as a studio reference monitor. See our detailed measurements.

Screen Reflectance: The screens on almost all Tablets and Smartphones are mirrors good enough to use for personal grooming. Even in moderate ambient lighting the sharpness and colors can noticeably degrade from light reflected by the screen, especially objects like your face and any bright lighting behind you. Screen Reflectance on the new iPad is 7.7 percent, in the middle of the range that we have seen for Tablets and Smartphones. The best we have ever measured in our lab tests are the Samsung Galaxy S and the Nokia Lumia 900 with its ClearBlack display, with about half of the Reflectance of the new iPad, and the current worst is the Amazon Kindle Fire, with about double the Reflectance of the new iPad. This article shows how screen images degrade in bright ambient light.

Viewing Angle Performance: According to Apple the new iPad has an IPS LCD like the iPad 2 and iPhone 4, and our lab measurements confirmed excellent Viewing Angle performance, with no noticeable color shifts. However, all LCDs, including IPS LCDs, do have a strong decrease in brightness with Viewing Angle, and the new iPad performed as expected, with a 57 percent decrease in brightness at just 30 degrees Viewing Angle. The Viewing Angle performance for the new iPad, iPad 2 and iPhone 4 are all virtually identical.

Much Lower Display Power Efficiency: The new iPad uses 2.5 times the Backlight power of the iPad 2 for the same screen Brightness. As discussed above that results from the TFT transistors in the LCD blocking much more of the light at higher ppi. On the other hand, the highest ppi iPhone 4 is the most power efficient display of all because it uses Low Temperature Poly Silicon LTPS, which is much more efficient than amorphous silicon in the iPads. All of this points to the need for the IGZO display technology discussed above, which is more efficient and lower cost than LTPS. It should be in production shortly, and is the first in a whole series of enhanced Metal Oxide semiconductors for LCD and OLED displays.

You can find much more analysis at the link below...

Read More [via MacRumors]