STN LCD Display Modules
 Thin Film Transistor (TFT) liquid crystal display (LCD) technology has long been recognized as one of the best-performing flat panel display technologies available, offering more vibrant colors and much faster response times than Super Twisted Nematic
STN LCD display modules. These features become increasingly important for multimedia applications that plan to integrate flat panel display technology. The engineering challenges, however, have slowed the adoption of this technology at the desktop level.
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Selection of STN LCD Display Modules
Many flat panel customers are now considering integrating TFT displays into desktop monitor applications in order to take advantage of their smaller size, lighter weight and lower power dissipation. Some of these applications include stockbroker trading stations, medical, CAD and point-of-sale (POS) applications.
STN LCD display modules, as a system designer for these applications, the engineer must design the required electrical interfaces necessary to make these flat panel desktop monitors simple and easy for their customers to integrate into their current and future computer systems.
Today, most TFT LCDs have a parallel digital RGB interface with 3, 4, 6 or 8 bits of digital information per color. This interface seems to be adequate for closed applications where a specialized graphics controller chip, providing digital RGB signals, is located close to the LCD. This type of configuration is typical in laptop computers and other enclosed computer systems with LCD displays such as kiosks and rugged computers. However, for desktop monitor applications, the graphics controller is typically located inside a PC, workstation or specialized computer system that is not located near the monitor. The standard output signal these computer systems typically provide is analog RGB. For a design engineer to interface to a
STN LCD display modules in an analog RGB application, an analog-to-digital (A/D) converter circuit must be implemented. However, once this A/D converter is designed, the image resolution typically does not look desirable due to difficult timing issues and the lack of complex dithering and other mathematical algorithms which are normally implemented inside the specialized graphics controller chip used for digital LCD modules.
STN LCD Display Modules : PLED Modules
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Analog RGB signals have long been the standard interface in desktop monitors for several reasons, including the capability to send higher-frequency signals to the monitor, longer cable lengths and lower EMI, to name a few. There are some standardization efforts now under way to specify new types of interfaces for digital LCD monitors; however, it will require the user to purchase, at the very least, a new graphics controller interface board or possibly even a new computer system that incorporates this new display interface
technology. See also PLED Modules, and pages relate to STN LCD Display Modules
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