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LCD (Liquid Crystal Display) screens are today's most commonly used displays and are available in a wide range of shapes, sizes, levels of quality, and models. But, how exactly does an LCD function?
Liquid Crystals are substances, which are not liquid or solid that bend and refract light waves as they pass through them. With the addition of external electric charges, the property of light changes creating the various shades of color and shadow you see on the display.
Currently, there are four competing LCD technologies in the market using liquid crystals TN+Film, VA, IPS, and FFS. Today, LCD screens are used in all aspects of our daily life.
Digital watches, cellular phones, televisions, and even outdoor advertisement boards remind us of how LCD has changed the way we live, and where it will take us tomorrow. The Four LCD Technologies TN + Film is used for entry level and mid-range solutions
Known for: simple process, high transmittance, fast response rate
Improvements needed: viewing angle, color shift, contrast ratio
 Frequently used for notebook
 Not Desirable for LCD TVs
VA is used for mid- to top-range solutions
Known for: high transmittance, fast response rate
Improvements needed: costs for compensation film, process complexity, color shift quality
 Not applicable for tablet PCs
IPS is used for high-end solutions
Known for: high color stability, simple process
Improvements needed: transmittance (low), contrast ratio (low)
FFS is used for high-end solutions
Known for: high transmittance, wide viewing angle, authentic color
In 1998 FFS is patented by BOE HYDIS. It exceeds conventional IPS technology by offering wider
viewing angles and improved transmittance. In 2003 FFS becomes Advanced FFS (AFFS) with a 180 degree viewing angle and authentic color. In 2004 BOE HYDIS wins IR52 Jang Youngsil Award, Korea 's highest award in technology, for AFFS Technology.
BOE HYDIS Licenses AFFS technology Patent to Japan's Hitachi Displays. Technological Features of AFFS:
-Improved control over liquid crystals through the use of nanoscale electric field
-Optimized use of electrode design
-Increased aperture ratio and transmittance through the removal of BM
-Modified nanoscale TFT structure to control power consumption
-Horizontal alignment of electric fields
-Use of transparent electrodes The technological features improve color reproduction through increased transmittance, facilitate a wider viewing angle, guarantee faster response time and lower power consumption, and ensure greater outdoor readability.
IPS vs. FFS AFFS' higher contrast ratio and white levels increase clearness and provide a 180 degree viewing angle. What sets our VIEWIZ applications apart from the rest is our signature AFFS technology. Created a decade ago by BOE, AFFS is continually being improved upon, and currently boasts five versions, with the fifth being the most advanced. What follows is a brief outline of the development of AFFS technology from Version I to V. BOE HYDIS AFFS employs a full layer of common electrodes, pixel electrodes, and rotating liquid crystal. Due to the nature of this layout, the higher the PPI count, the higher the level of transmittance AFFS LCDs will have. TN is often used for mobile LCDs for its high transmittance, however, by 200PPI, AFFS transmittance is 40 percent better than that of TN while consuming 30 percent less power. BOE HYDIS put its name on the TFT-LCD map with the creation of AFFS (Advanced Fringe Field Switching Technology)-securing the Number 1 position in the Tablet PC industry. Changing with the times and responding to the demand for even more advanced products, we have evolved AFFS to AFFS+, technology that boasts lowered power consumption, improved transmission of color and images, and impressive internal LCD panel reflection-guaranteeing perfect readability even under the brightest sunlight. AFFS+ is True Evolutionary Progress. Technological Features of AFFS : -Improved internal reflection ensures greater outdoor readability -Special embossed resin layer on gate area enhances inner reflectance -BMless pixel structure enables high transmittance and high aperture ratio -Reflective polarizer lowers surface reflectance and minimizes light scattering -Control of external and internal light coming from the back light or color filter lowers power consumption 
A high contrast ratio and transmittance combined with limited surface reflection technology provides excellent indoor and outdoor viewing and clear imaging. AFFS employs a full layer of common electrodes, pixel electrodes, and rotating liquid crystal. Due to the nature of this layout, the higher the PPI count, the higher the level of transmittance AFFS LCDs will have. TN is often used for mobile LCDs for its high transmittance, however, by 200PPI, AFFS transmittance is 40 percent better than that of TN while consuming 30 percent less power.
BOE HYDIS put its name on the TFT-LCD map with the creation of AFFS (Advanced Fringe Field Switching Technology)-securing the Number 1 position in the Tablet PC industry. Changing with the times and responding to the demand for even more advanced products, we have evolved AFFS to AFFS+, technology that boasts lowered power consumption, improved transmission of color and images, and impressive internal LCD panel reflection-guaranteeing perfect readability even under the brightest sunlight. AFFS+ is True Evolutionary Progress.
Technology developed by BOE to enhance TFT-LCD light transmission and viewing angles.  A faster response time and higher brightness allow the tablet using area to be expanded to include such functions as ubiquitous mobile computing, DMB and gaming.  For portable applications, the lower the amount of power needed; the better. Commonly mobile LCD manufacturers must sacrifice transmittance for cost-effectiveness, or reduce the viewing angle to lower power consumption. However, due to its effectiveness in transmittance technology, compared to IPS, AFFS V.III uses a 30 percent lower driving voltage for its notebook applications.
 Technological Benefits of AFFS  : -Guaranteed sunlight readability -Enhanced indoor color vividness -Lowered power consumption  |
