Boy, it sure looks like soon everyone and their ZTE or Huawei phone will sport an HD 720p mobile display. Hitachi just issued a press release today that it has managed to use the cheaper amorphous silicon technology
to create the tiny pixels needed for a 720x1280 display.
Until now, those HD munchkins and their complex wiring was only achievable with the expensive low-temperature polysilicon (LTPS) method, like in the 4.5-incher unveiled by the Japanese themselves in February
, or the 3D-capable one they showed in July
. Hitachi, who basically pioneered the IPS-LCD technology, as found in the Apple iPhone 4 and other LCD handsets, didn't stop with just creating an affordable 4.5" HD display, though.
By altering the aperture of its pixels, the display uses backlighting much more efficiently now, which should translate into improvements in battery life of eventual phones equipped with the new HD 720p mobile screen from Hitachi.
Moreover, from what we see in the specs table below, it is using a regular RGB matrix, not a PenTile arrangement, which is translating to true 329ppi of resolution, making it a prime candidate for any penny-pinching smartphone manufacturer. The only specification where the amorphous silicon display scores less than the LTPS 4.5-incher, is contrast - 1000:1 vs 1100:1 for the LTPS screen:
|Display area||55.51mm × 98.69mm|
|Display Pixels||720 × RGB × 1280|
|Pixel Pitch||0.0257 × RGB × 0.0771mm|
|Number of colors||16.77M|
|Color reproducibility||Than 70% CIE1931NTSC|
|Viewing angle (CR> 10)||160 ° horizontally and vertically|
|Brightness||500 cd / M 2|
The rest of the specs stay, though - 500 nits of brightness, which is about what current high-ends exhibit, 160 degrees viewing angle, and the ability to represent 70% of the color gamut, which is better than most current offerings. The cheap 4.5" HD display by Hitachi will be shown at the FPD International 2011 expo in Yokohama October 26-28.