The definition of Wide Temperature Range
An operating temperature is the temperature at which an electrical or mechanical device operates. The device will operate effectively within a specified temperature range which varies based on the device function and application context, and ranges from the minimum operating temperature to the maximum operating temperature (or peak operating temperature). Outside this range of safe operating temperatures the device may fail. Aerospace and military-grade devices generally operate over a broader temperature range than industrial devices; commercial-grade devices generally have the lowest operating temperature range.
Although biological systems do not have a defined operating temperature, individuals are most comfortable when body temperature fluctuations as a result of environmental factors are minimised.
Electrical and mechanical devices used in military and aerospace applications must endure greater environmental variability, including temperature range.
For example, resistors are manufactured in several grades:[citation needed]
Commercial grade:0 °Cto70 °C(sometimes −10 °Cto70 °C)
Industrial grade: −40 °Cto85 °C(sometimes −25 °Cto85 °C)
Military grade: −55 °Cto125 °C(sometimes-65 °Cto175 °C)
These grades ensure that a device is suitable for its application, and may withstand the environmental conditions in which it is used. In theUnited States, the Department of Defense has defined the United States Military Standard for all products used by theUnited Statesarmed forces. A product's environmental design and test limits to the conditions that it will experience throughout its service life are specified in MIL-STD-810, the Department of Defense Test Method Standard for Environmental Engineering Considerations and Laboratory Tests.
What is this technology?
Our selected AUO,CHIMEI TFT-LCD modules are designed to deliver optimum performance over a wide range of temperatures (Panel operating temp. from -20 to 70 degrees C) in order to accommodate for diverse industrial applications such as outdoor ATM,Kiosks in winter and summer.
How does this technology work?
With our heater electronic control mechanism with temperature sensors, the heater control board can control the heater on or off and then regulate the internal system temperature change.
(In generally test condition, real case should depend on your panel and mechanical selection). At the low temperature condition, the mechanism starts from pre-heating process and then the LCD panel turn on when its 4 degrees Celsius. When the internal temperature drop below 7 degrees, the heater will be turned on again to keep the system on and keep the temperature above 0 degree Celsius.
On the other side, at the high temperature condition, the mechanism maintains the power switch to protect from overheating. The power will turn off when over 65 degrees C, and will back to turn on status when the internal temperature drop back to 55 degrees. With advanced fan cooling system design, the turn-off temperature can also be applied on this mechanism. Combined with mechanical NMEA/IP degree front bezel and other technical module integration, the wide temperature range system technology shows excellent reliability in harsh environment application.
Features
•Wide range temperature LCD panel
•Heating control sub-system
Applications
•Outdoor KIOSK
•Theme park POS
•Industrial Automation
•Heavy-duty Vehicles
1.2 Sunlight Readable Display
Transmissive TFT LCD has no reflective properties. Instead the design relies upon a backlight combined with liquid crystal cells that are switched to different states to pass various wavelengths of light through. The combination of activated cells creates the image on the screen. Transmissive technologies are utilized when there is minimal ambient light available.Transflective TFT LCD displays utilize liquid crystal cells that include a reflector and a backlight. The reflector or transflector can be powered at different states based upon ambient light. The more ambient light available the less power applied to the backlight. This technology can be used in sun readable displays but is generally poor at producing full color displays.Reflective TFT LCD display modules utilize, as the name implies, liquid crystal cells that reflect the ambient light. Due to the lack of backlight these displays required ample light, well lit office or outdoor environment, while at the same time utilizing a small power draw.Based upon the above descriptions it is easy to assume that a reflective display would work best in sunlight while a transmissive would be a good combination of ample ambient light viewing and low ambient light viewing modes. In reality the pure transmissive LCD design is a bit too cost prohibitive to manufacture so scientists developed a more simple approach.Modern sunlight readable displays utilize the transmissive technologies engaged by sandwiching the the cells between polarizing layers. The polarizing layers support the LCD display by allowing the proper mix of wavelengths into the display to be combined with a higher output backlight. The net result is a true sunlight readable display.Overcoming the reflective and power consumption issues while creating a cost effective solution is what separates Shelly Inc Sunlight readable displays from other displays in the industry. By utilizing optical bonding to apply the polarizing layers our displays contained less reflective surfaces between the liquid crystal cells hence creating a more clear viewing surface.
What is this technology?
Transflective LCD technology can be applied to certain selected regular TFT LCD to introduce the LCD with a reflective function. With the imposed reflective function, the modified LCD can reflect the ambient light passing the LCD cell and utilize the reflected light beams as its illumination. The stronger the ambient light is, the brighter the LCD will appear. As a result, the modified LCD is viewable under lighting conditions including direct sunlight. The advantages of transflective LCD technology are as the comparison table below.
How does this technology work?
Transflective LCD modules hold both transmissive and reflective properties, and the method of image display depends upon the conditions of the ambient environment. The display uses a backlight with a transmissive property in dark environments, and uses external light with a reflective property in bright environments. Our improved transflective method allows for better color performance, which provides excellent color characteristics similar to the transmissive mode. The net Reflectance rate of our Transflective LCD solution is from 0.9% to 1.3% varied from panels selected. For example, with 1.3% net reflectance rate and under 10,000 ambient sunlight conditions, the brightness gain is around 130 nits added to original backlight brightness.
Benefits
•Readable under all lighting conditions to include direct Sunlight
•Enhanced contrast ratio for both indoor and outdoor conditions
•Utmost indoor color saturation, brightness, and viewing angle
•Full mechanical and electrical compliance with the existent system
•Power saving and backlight life preserving in outdoor applications
•No extra heat generation even when viewed at higher brightness
Applications
The market demands for outdoor LCD applications are expanding, such as mobile navigator/video systems, table PC, KIOSK, POS, LCD TV. Transflective LCD truly offers a most convenient and affordable solution for your various outdoor LCD applications.
1.3 Wide Voltage Input
What is this technology?
The supply of voltage in different application scenes varies or appears instable as a result of a headache of no suitable power to fit the appliances sometimes. Incorrect voltage and current may also damage the electric components. Our wide voltage range power input solution is designed accordingly to solve the problem and to protect the products by converting different voltage input to meet the one as required. We provide several kinds of DC to DC converter power module fufilling full range of both LCD display and embedded system demands.
Features
•Wide voltage range power acceptable
•Good stablity for reliability for industrial request
•High Efficiency up to 90%
•Over Voltage and over current protection
•Compact size design
Application
•Industrial Automation
•HMI
•Outdoor Kiosks
•Heavy-duty Vehicles
•Marine & Military
1.4 Hyer Dimming
What is this technology?
Under some specific user conditions, it will require that the monitor can be adjusted to lower brightness level than normal. The “Hyper Dimming” technology provides the wider brightness adjustment level combined with excellent appearance to meet the dim-to-black requirement. The high sensitivity of fully adjustable backlight control makes the product ideal for day and night environment.
How does this technology work?
The “Hyper Dimming” technology applies the new “PWM” method that can expand dimming range than previous “Analog” methods. The traditional methods for dimming CCFL are either to adjust the lamp current, or regulate the average current feeding the CCFL inverter. This dimming method has been referred to as “analog dimming.” This manner provides the highest efficiency circuits but either limits dimming range or violates lamp specifications to achieve wide dimming ratios.
The “Pulse Width Modulation” (PWM) technology is used to overcome this problem; hence expanding the dimming range. We simply pulse the backlight at the full rated lamp current, and modulate intensity by varying the percent of time that the lamp is operating at the full rated current. PWM dimming can significantly extend the dimming range capabilities. PWM control of multiple lamps eliminates the typical problem of one lamp extinguishing prior to others at low intensities. Lamp layout and parasitics are no longer limitation on the display dimming capabilities.
Benefits
•Dimming range (Duty cycle: 0%~100%) provides the widest brightness control ratio.
•User-friendly dim-to-black VR knob adjustment for ease of operation.
•Integration of other display technology such as sunlight readable or anti-glare coating ensures the great readability for daytime and night time application.
Applications
•Industrial / Outdoor Use
•Navigation / Ship Automation
•Aero Space Application
•Military Application
1.5 Water-Dust Proof
What's this technology?
To protect against damage from environmental factors, IP sealing offers resistance to water, dust, and humidity. This technology has been tested by Winmate, following standard product design testing procedures.
Various mechanical IP dust & water proof designs are available, as well as ruggedized industrial flat panel LCD displays. Ruggedized LCDs are designed specifically for high reliability, shock and vibration tolerance, survival of high temperatures, and corrosive environments. The combination of IP65 technology and ruggedization results in a product that is ideal for outdoor environments.
