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July
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| PRODUCT ENHANCEMENT | ||||||
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Monitors Thrive When Exposed to Low and High Temperatures
Since many applications require a display to operate at extremely cold temperatures, display engineers have devised a method which can eliminate the damage that extreme cold can cause to a display. Integrated internal “Heaters” can be added, as an option, to most VarTech Display's. When testing, displays with an added heat thermostat system perform flawlessly in cold temperatures. The heater will automatically begin to warm the display after the system's internal temperature drops below the acceptable range. The lowest display operational temperature varies among displays. Both the operational and storage temperature range for a particular display can be found on the display's data sheet. On
the other extreme, many of VarTech fully-enclosed workstations are
available with an advanced heat thermal management system using
a closed-loop process and aluminum fins to keep the electronics
cool even in the most severe environments without using outside
air. If additional cooling is needed, Vortex A/C can be added. Using
vortex tube technology, cold air is generated by the Vortex A/C
from the compressed air supply and is distributed throughout the
enclosure. Since ambient air never enters the cabinet, it’s
perfect for harsh, dirty environments. For more information on the heating system, please contact a sales representative at 1-800-223-8050 or complete the contact form. |
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| EXPANDING OPERATIONS | ||||||
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VarTech Metal Fabrication Shop - Now Operational
This
new operation center will enable us to better serve our engineering
departments with initial product prototyping, shortened metal-work
production times for our manufacturing team, will enable us to accept
larger order contracts from our customers, and will offer us even
greater capabilities for customized customer designs.
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| Tech Talk | ||||||
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What Does "Display Contrast Ratio" Really Mean? A high contrast ratio is a desirable feature on any display. By definition, contrast ratio measures the luminosity of the brightest and darkest color that an LCD can display. If a display has a poor contrast ratio there will be a lack of true black and desaturated colors. There are a variety of methods that can be used to measure a display's contrast ratio and each of these methods can provide a wide array of results for the same display. A typical contrast ratio may be noted as 1000:1 or 100:1. The larger number will result in the best contrast. Display manufacturers and designers prefer different methods of measurements. Manufacturers measure the contrast ratio based on methods that isolate the display from the system, whereas, designers prefer methods that allow them to factor in the room effect. Ideally a room absorbs all light and the only light displayed would be from the monitor, however, in actual rooms some of the light is reflected back to the display which effectively decreases the contrast ratio. To further complicate contrast ratio measurements, one must consider both static and dynamic contrast ratios. The static ratio only considers luminosity levels at a single instance in time, whereas, the dynamic ratio considers the luminosity the monitor displays over a period of time. This may be thought of more simply by referring to the static ratio as measuring a static image and the dynamic ratio by considering the affects of a more dynamic or moving image. Ideal
Room Measurement Real
Room Measurement
The Ideal Room Measurement (full on/full off) measurement method effectively measures the dynamic contrast ratio of a display, while the Real Room Measurement (ANSI contrast) is best used to measure static contrast ratio. Comparing dynamic and static contrast ratios is similar to one trying to compare apples and oranges. These items should never be directly compared. Some manufactures choose to market only the dynamic contrast ratio when the result is better than the display's static ratio. A display with a static contrast ratio of 10000:1 is a much better display than one with a 10000:1 dynamic and 5000:1 static contrast ratio when the input signal contains full range of brightness' from 0 to 100% simultaneously. However the displays will be equal when the input signal range is decreased to a 0 to 20% brightness level. In order to achieve optimum contrast ratio results, displays are typically measured in completely dark rooms. It will be nearly impossible to achieve these same results during normal viewing conditions. The reduction in contrast ratio will depend on the display luminance and the reflective light in the room. For more information please complete the contact form or call 1-800-223-8050. |
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| Interesting Fact | ||||||
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Most Americans would incorrectly answer Thomas Edison. Before Thomas Edison received a US patent for his light bulb, a British inventor by the name of Joseph Swan had already patented the light bulb in Britain. At least ten years before applying for patent, Swan unveiled the light bulb in New Castle, England. Timelines vary as to when the events took place. Although Edison did loose his patent rights as inventor of the first light bulb, he made significant improvements to their life span.
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VarTech
Vision July 2006 To edit or delete your contact information for electronic correspondence, please click here and be sure to select either the change or remove option before submitting. Please note that It may take up to 7 days before the change is processed. |
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In
the past, many display systems suffered picture quality degradation
or permanent damage because they could not effectively operate at
frigid temperatures. The display components would fail causing the
system to respond slowly or not at all. Often times the resulting
damage was permanent.
Due
to continued extensive sales growth, VarTech Systems has opened
a third facility. Our new 41,000 square-foot metal fabrication building
houses a full service metal fabrication and assembly operation.
We have the experience and resources to manufacture any size, shape
or configuration using stainless steel, aluminum or alloys. This
will further ensure on-time raw materials deliveries, reliable quality,
and consistent production.