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What Is TFT LCD?

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What is a TFT?

As a display device TFT stands for Thin Film Transistor and is used to enhance the operation and usefulness of LCD displays. An LCD is a fluidic display device that uses a crystalline filled liquid to manipulate a rear illumination polarized source by means of an electrostatic field between two thin transparent metal conductors such as indium tin oxide (ITO) in order to present an image to the viewer. This process can be used in both segmented or pixelated display devices but is found synonymous with TFT displays color .

When an LCD is used to display moving images the inherent slow rate of change between fluid states over a large number of pixel elements can be a problem due in part to capacitive effects, which causes moving image blurring. By putting a high speed LCD controlling device in the form of a thin film transistor right at the pixel element on the glass surface, the LCD image speed issue can be greatly enhanced and for all practical purposes eliminates image blurring.

Other benefits of these thin film transistors are they allow for thinner display designs and different pixel designs and arrangements to vastly improve display viewing angles.


TFT Applications

TFT displays are found in many applications these days, from mobile devices, appliance, medical devices, instrumentation, aircraft and certainly computer display devices as well as TV’s. The addition of the thin film transistor in LCD design vastly improved the use of LCD’s in all market areas.

Differences between OLED, LED, LCD, and TFT Screens

LCD: liquid crystal display. Works by adjusting the amount of light blocked. Usually has a backlight but might not (clocks, calculators, Nintendo Gameboy). The green-black ones can be very cheap and are a mature technology. Response time can be slow.


TFT: is a type of LCD with a thin film transistor attached to each pixel. All computer LCD screens are TFT since early 2000s; older ones had slower response times and poorer colour. Cost is now very good; power consumption is fairly good but dominated by the backlight. Has to be manufactured out of glass.


LED: light emitting diode. As the name suggests, emits light rather than blocking it like LCD. Used for red/green/blue/white indicator lights everywhere. Some manufacturers advertise "LED" displays that are TFT screens with a white LED backlight, which is just confusing. Ones that are real LED screens are usually OLED.


OLED: organic LED (rather than silicon or germanium based like regular LEDs). Comparatively recent technology, so cost still quite variable and not available in really large sizes. In theory can be printed on plastic, resulting in lighter flexible displays with good brightness, good power consumption and good response time.


Do you need a TFT LCD supplier?

Shenzhen CDTech Electronics established in 2011, is a national high-tech enterprise specializing in TFT LCDs, Touch Displays, HDMI Displays and other display products.

The factory covers an area of 5,000 square meters, including thousand-level dust-free workshop area of over 1000 square meters. CDTech has industry-leading automatic production and testing equipment which can provide customers with standard and customized display and touch total solutions. Our products are widely used in Industrial Control Equipment, Medical, Smart-Home, Automotive and Vehicle Displays, Instrumentation, and other Information Terminal applications. CDTech has obtained ISO9001, ISO14001, ISO13485, IATF16949 and etc. through certifications.

CDTech will continue to invest and innovate to drive quality improvement, and strive to become a global leading and professional display manufacturer!


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