Japan Display Inc. (JDI) has started shipments of 8.9-inch Wide-QXGA
(2,560 x 1,600 pixels) low temperature poly-silicon (LTPS) TFT-LCD
modules in September 2013.
A 7.0-inch Wide-UXGA (1,200 x 1,920 pixels) LTPS TFT-LCD module has
been in mass production since June, 2013, according to the company.
To date, most conventional tablet devices have employed amorphous
silicon (a-Si) TFT-LCD technology, resulting in displays with low
pixel density, wide dead-band areas, and high power consumption.
According to JDI's design simulation, the LTPS TFT-LCD technology has
contributed to 40-50% less power consumption and about 30% narrower
dead-band width compared to conventional designs for a-Si TFT-LCDs.
The 7.0-inch Wide-UXGA TFT-LCD has pixel density of 323ppi, and the
8.9-inch Wide-QXGA TFT-LCD is 339ppi. JDI?s in-plane switching (IPS)
technology realizes wider viewing angles, a higher contrast ratio and
less color shift. The combination of IPS, high-resolution and high
brightness of 500cd/m2 contribute to vivid images for small fonts and
high quality pictures.
Since there are fewer LCD drivers, JDI's LTPS TFT-LCD technology
contributes to 70-80% less power consumption of the LCD driving
system than conventional designs for a-Si TFT-LCDs. In addition, JDI
claims that its high-transmissive pixel design minimizes also
backlight power consumption by approximately 40% less compared to
conventional designs for a-Si TFT-LCDs.
The technology is also able to achieve about 30% narrower dead-band
width than conventional designs for a-Si TFT-LCDs.
| Screen size (diagonal) |
7.0inch (17.8cm) |
8.9inch (22.6cm) |
| Number of pixels |
1200(xRGB) x 1920 (WUXGA) |
2560(xRGB）x 1600 (WQXGA) |
| Resolution density |
323ppi |
339ppi |
| TFT Type |
LTPS TFT |
LTPS TFT |
| Display mode |
Transmissive IPS |
Transmissive IPS |
| Contrast ratio |
1200 : 1 (typ.) |
1200 : 1 (typ.) |
| Viewing angle |
>160 degree（CR>100:1） |
>160 degree（CR>100:1） |
| NTSC ratio |
72％ |
72％ |
| Dimensions |
98.70 mm(W) x 160.80 mm（H）x 1.98mm（D） |
200.30 mm （W）x 132.10 mm（H）x 1.82mm（D） |
| Dead-band |
top 1.4mm
side 1.4mm
bottom 6.8mm |
top 2.0mm
side 2.8mm
bottom 7.6mm |
| Number of LCD drivers |
1 |
2 |
| Power consumption (at 500cd/m2） |
1250mW |
2320ｍW |