Japan Display Inc. has developed a 7-inch wide QXGA (1,600 x 2,560 pixels) liquid crystal display module that comnbines the advantages of the local dimming backlight and "WhiteMagic" teschnoologies. WhiteMagic" LCD modules consume low power and offer a high visibility under sunlight. "WhiteMagic" has the effect of improving the brightness of the entire screen by adding a White (W) subpixel, and thereby reducing the backlight power consumption.

To maximize "WhiteMagic"'s effects, it is important to analyze and process the input picture image data, and drive the LCD panel and backlight appropriately and efficiently.

The new LCD can control the backlight more efficiently through the combined use of "WhiteMagic" and the local dimming backlight. According to JDI, it reduces power consumption by 20% compared with conventional "WhiteMagic" modules. The new local dimming backlight adopts the edge-lit method, in which the LEDs are placed at the edges of the lightguide plate. This allows for a thin profile and a total module reduction of up to 1.16 mm.

JDI will present this product at the symposium of SID DISPLAY WEEK 2014 beginning on Sunday, June 1, 2014 in San Diego, California, USA.

Prototype specifications

Display mode: LTPS IPS
Screen size (diagonal): 7.0-inch (17.9cm)
Number of pixels: 1,600(H) x 2,560(V) RGBW (WQXGA)
Resolution density: 431 ppi
Module thickness: 1.16mm
Dead-band: Side 1.0mm
NTSC ratio: 70 %
Contrast Ratio: 2,200:1 (19,000:1 max.)
Viewing angle: >160 degree (CR>100:1)
Surface luminance: 500cd/m2 (typ.)