TFT LCD Modules Feature Replaceable LED Backlights, High Brightness and Low Power Consumption
AbraxSys Corporation, a committed industry leader that collaborates with customers to create breakthrough designs, not long ago began using an advanced color active-matrix thin-film transistor (TFT) liquid crystal display (LCD) module product lineup for most of its industrial applications that incorporates long-life light-emitting diode (LED) backlighting systems. Developed by AbraxSys, the modules are designed to satisfy the requirements of a broad range of industrial applications, such as test and measuring equipment, medical equipment, portable handheld computing devices, and more, utilizing the latest LED backlighting technology.
The LED-based backlighting systems provide an average backlight lifetime of over 70,000 to 100,000+ hours, or approximately well over 8 years continuous operation, (to half-brightness of the initial luminance specification), which exceeds that of today’s common TFT LCDs for industrial applications utilizing long-life cold cathode fluorescent lamp (CCFL) backlighting systems. AbraxSys has achieved this by applying long-life LEDs, and by optimizing the thermal design of the industrial-type LED-based backlighting system based on AbraxSys’ extensive experience in utilizing LED backlighting for rugged TFT displays. The modules have been designed 
with a replaceable backlight structure to accommodate the product longevity requirements, and the harsh-usage environments, of industrial, military, and marine applications. In addition, AbraxSys has added an advacned LED driver circuitry into the electrical interface for the displays.
Compared to CCFL backlit displays, LED-backlit displays feature superior characteristics such as lighter weight, lower electrical noise, lower power consumption, and offer a wider adjustable luminance range. LED-backlit displays also reduce the environmental impact, in consideration of both material and energy consumption, since they are mercury-free1 and lower in power consumption. Also, the new LED-backlit displays do not require the high-voltage and high-frequency circuits required to control luminance in CCFL-backlit displays, thus enabling a higher level of flexibility in system design in terms of safety, electro-magnetic interference (EMI) compensation, and system architecture.
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