While viewing a display in either direct sunlight or other high ambient lighting conditions, many users experience what we at VarTech refer to as the “Squint Factor” — the viewing quality of a monitor in high light conditions can be diminished or become “washed out”. Current technology has defined three methods that can be used to increase display brightness. As always, there is a cost vs. efficiency trade off amongst the methods. Although the traditional high bright monitor offers the “best of both worlds” scenario, it is also the most expensive of each method used. The transflective and optical bonding methods of achieving a high bright monitor do present some tradeoffs, however, are perfectly suited to many applications and offer a cost savings over a traditional high bright display.
Below you will find a description of the 3 major types of high bright monitors. VarTech Systems offers high bright displays in 6” – 32” screen sizes and a variety of mounting options: VESA, yoke, rack, console and panel. Within the VarTech line of high bright displays, you will also find that many of the models are available in NEMA 4, NEMA 4X and All-Weather Models NEMA 6 (IP67).
Actively Enhanced or Traditional High Bright Displays use additional backlights in comparison to standard commercial grade LCDs in order to increase the luminance level of the monitor. Due to the additional heat produced by these backlights, the necessity of thermal management comes into play and dual fan cooling systems are often integrated to compensate for the rise in temperature. The result of these attributes coupled with Vartech’s standard display technology yields displays exhibiting 700 to 1200 nits thus allowing them to be completely sunlight viewable. In addition, these products may also be equipped with either manual or automatic dimming controls for those instances where low and high brightness must be attained. These systems are ideal for use in direct sunlight or any high ambient light condition. More Information on VarTech’s high bright displays.
Optically Bonded High Bright Displays increase the apparent luminance level of a monitor by sealing either a protective top cover glass layer or touch screen to the face of the display screen. In turn, this optically bonded layer reduces the reflectivity, increases contrast, decreases the need for high bright backlights and lowers the display temperature. Our bonding process eliminates the air-gap between the display and the cover glass, vastly reducing reflective light, which causes visual washout of the display image. V-BOND also enhances structural integrity by supporting the LCD assembly with the cover glass. The bond 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. With a V-Bonded monitor a typical 300 –500 nits display is sunlight viewable in most lighting conditions. At 500 nits or greater the display becomes completely sunlight viewable. Learn more about VarTech’s V-Bond process to achieve a high bright display.
Transflective Flat Panel Displays utilize a standard LCD and then integrate a partially reflective mirror layer between the LCD and the backlight. When a transflective Flat Panel is used indoors, it is illuminated by the backlight just like a transmissive LCD, except that the mirror layer blocks some of the light. When a transflective LCD is used outdoors, ambient light reflects off the mirror layer and illuminates the LCD. Note, that outdoor light has to go through the LCD twice, once on the way in and once on the way out and this tends to make the outdoor performance of a transflective LCD not as good as the indoor performance, where the light only has to go through the LCD once. A transflective LCD is therefore by definition a compromise. It can never be as bright as a transmissive LCD indoors, and it can never be as bright as an ultra high brightness flat panel outdoors, but with transflective technology, there is no added power requirement, the cost savings over traditional ultra high brightness flat panels can be significant, and the need to dissipate additional heat is minimized.