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Wednesday, October 02, 2013
Japan Display Starts Mass Production Of 8.9-inch Wide-QXGA LTPS TFT-LCD Modules for Tablets

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
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

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