64x128 dot matrix display on 96x48mm LCD panel

For the ultimate in dot matrix readability, the popular 64x128 pixel display format has now been applied to a 96x48mm LCD panel, believed to be the largest display area of its type available anywhere

Designers of hand-held products who need the ultimate in readability from a dot-matrix format graphic display can now turn to the [HC-64x128-6990] from Densitron.

They have taken the popular 64 x 128 pixel display format and applied it to an LCD panel that measures no less than 96 x 48 mm, believed to be the largest display area of its type available anywhere.

The module, says Densitron's Sales Director Gary Mullins, will be used to provide a distinctive user interface on products in a wide range of markets, such as PDAs, games, point-of-sale equipment and instrumentation, both portable/hand-held and fixed.

The [HC-64x128-6990] is a totally self-contained display module, with on-board single-chip display driver (the proven and reliable SED 1565), plus on-board RAM and DC/DC converter to provide the necessary voltage supplies to drive the screen.

All of these features are implemented using chip-on-glass construction, so the module presents an overall thickness of just 2mm.

Bigger display area does not mean an increased power demand; Densitron has engineered the module to operate with a typical current demand of only 50uA.

As with its entire extensive catalogue of standard and custom LCD products.

Densitron can supply the [HC-64x128-6990] with any one of a number of passive image-enhancement options.

Applied as films to produce particular effects, these include ?lverback - a high contrast/super reflectance film that improves readability in both natural and artificial ambient light conditions; èameleon - a film that produces the effect of inverting the display mode; ?rrorlight - a range of films that are super-reflective and which also include a filter to add colour to the display background, in blue, red or gold; and ?omerang - a prismatic film that reflects incident light back in the direction from which it reaches the display, typically used in utility meter displays, to give outstanding readability when illuminated by torchlight.

A key technology involved in producing this display is Densitron's use of ultra-low-resistance ITO (indium-tin-oxide coated) glass.

(ITO is the transparent, yet conductive, material that provides the electrical paths needed to switch the display's 4608 pixels.) Individual pixels in the [HC-64x128-6990] are approximately 0.75mm square.

Mastering this technology allows Densitron to produce innovative display products such as the [HC-64x128-6990] at extremely competitive prices, in turn giving designers an important edge in differentiating their products in fast-moving markets.

(This was Engineeringtalk's Top Story on 22 January 2002).

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