Eliminate the "Squint Factor" with VBOND

October 2005 Baton Rouge, Louisiana - Using monitors exposed to high lighting ambient conditions often degrades the quality of the display. VarTech Systems has unveiled new technology to eliminate what we refer to as the "Squint Factor". Monitors equipped with VBOND technology are now clearly visible in any lighting condition. Degradation of monitor displays due to poor lighting conditions is now considered a problem of the past.

Light travels through a variety of transparent materials; such as air, glass or plastic. These materials may have differing "indices of refraction". As light transitions from one material to another, a mismatch in the "refractive index" will cause some portion of the incident light to be reflected. In the case of an air to glass interface, approximately 4% of normally incident light will be reflected. These reflections reduce the displays inherent contrast, to the point that with a bright light source, display "viewability" is reduced to unacceptable levels.

Reflected light increases if a cover glass or touch switch is placed over the display. The "index of refraction" mismatch will occur at each transition point; air to glass, glass to air and air to the front of the display. 4% reflective loss occurs at each transition and the loss is cumulative. An application of a simple cover glass will transmit back to the viewer over 12% of the original light source. Even in indirect sunlight, a display is quickly over-powered by the reflection and the display becomes impossible to read.

VBOND from VarTech Systems is a solid, transparent bond that optically couples the front cover glass or touch screen directly to the face of the display. This coupling all but eliminates the reflection from the two internal layer interfaces. This will mean a reduction of the reflective loss by 2/3, compared to a separate cover glass, even without special treatment of the outer surface. In the most demanding applications, the front surface can be treated with anti-reflecting material. This will reduce the total reflective loss by over 90%!!! With a reduction of this nature, a 300-500 nit brightness display will be viewable in most daylight lighting conditions. At 500-800 nits brightness, most displays will be completely sunlight viewable.

Aside from the optical quality, VBOND maintains perfect display uniformity while providing shock protection, unlimited humidity protection and elimination of fogging caused by trapped moisture accumulating in typical air-gap assemblies. VarTech provides both commercial and industrial LCD monitors that are manufactured using VBOND technology.

VarTech Systems is a worldwide leader of industrial and marine/military grade LCD flat panel display systems, rugged CRT monitors, and industrial computers. Today, VarTech Systems products are used in virtually every industrial sector in a wide variety of applications. From the factory floor to the control room, from the ship's bridge to submarine sonar, from the cockpit to the simulator, from the harshest environments such as direct hose-down washing to vehicle mounting for the Border Patrol, our products provide exceptional quality and reliability. VarTech display products include ruggedized touch screens, NEMA 4 and 4X (IP65/IP66) industrial panel PC and enclosures, public access kiosks, formidable systems for mission critical applications, sunlight readable displays designed to operate throughout high ambient light conditions, and dependable solutions for the harshest indoor locations and the worst outdoor environments.

VBOND Available in size 6.4" to 47" and in many configurations including panel mount lcd, Nema 4x panel mount, rack mount lcd, VESA mount lcd, chassis mount lcd, rugged tabletop lcd, and widescreen 1080p lcd.

Company Information
VarTech Systems, Inc
225-298-0300
info@vartechsystems.com