Sharp UV2A
New photo-alignment technique promises deeper blacks, enhanced contrast and an end to backlight bleed

Sharp has announced a new technology for LCD TV display panels, which it says will enhance contrast, give deeper blacks, end backlight bleed and offer significant energy savings.

The company also sees its UV2A – Ultraviolet-induced Multi-domain Vertical Alignment – technology as an essential building-block for a new generation of screens ready to handle not only the demands of 3D TV, but also future 4Kx2K Super HD displays.

At the heart of the technology is a new photo-alignment technique, providing highly accurate control over the alignment of the liquid crystal molecules, using a special material responding to ultraviolet light.

The technique involves a proprietary polymer material in the display's alignment film: when exposed to UV light the polymers align themselves in the direction of the radiation. The liquid crystal molecules then align themselves in the direction of the polymers.

More after the break

The major advantage here is the accuracy with which the liquid crystal molecules can be aligned: Sharp says it's moved beyond its previous nanotechnology into picotechnology, allowing the tilt angle of the molecules, which are around a couple of billionths of a metre in diameter, to be controlled to within trillionths of a metre.

The benefits include:– A high contrast ratio of 5000:1 – some 60% greater than that of conventional panels – to give deeper blacks and eliminate backlight bleed problems– Higher optical efficiency to reduce energy consumption (the aperture ratio is 20% greater than conventional panels', and so needs less backlight brightness)– And a response time twice as fast as current models.

A further bonus is that the new technique simplifies panel construction, thus making production more efficient.

Sharp will be introducing this technology across the board for panels to be produced at two of its plants in Japan – the new LCD panel plant in Sakai and at Kameyama Plant No. 2.

The company displayed its first prototype 4Kx2K LCD panel, a 60in model with 4096x2160-pixel resolution, some three years back. 4Kx2K is the proposed Super HDTV, or 'Super Hi-Vision', system under development by electronics companies including JVC, Panasonic, Sharp and Sony, and broadcasters led by Japan's NHK and the BBC.