LCD refers to Liquid Crystal Display, which is a general term for liquid crystal display technology. According to the driving mode, it can be divided into three types: static driving, simple matrix driving, and active matrix driving. Among them, the simple matrix type can be divided into two types: twisted turn column type (TN) and super twisted turn column type (STN), while the active matrix type is mainly thin film transistor type (TFT). Their differences lie in the arrangement, twist angle, and circuit aspects of liquid crystals.
TN English name: Twisted Nematic, twisted nematic, the twisted orientation of liquid crystal molecules deviates by 90 °, with good contrast
STN (Super Twisted Nematic) is a super twisted nematic liquid crystal with molecules rotating 180 to 270 degrees. The contrast is worse than TN, but the viewing range is stronger and the response time is faster than TN.
TFT (Thin film transistor) thin film transistor, also known as the true color series display screen.
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category
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TN
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STN
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TFT
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Driving method
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Simple matrix driven twisted nematic
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Super twisted nematic driven by simple matrices
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Active matrix type
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Viewing angle size
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Small (viewing angle below 30 degrees)
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Medium (viewing angle below 40 degrees)
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Large (angle of view+70 degrees)
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Picture comparison
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Min (screen contrast at 20:1)
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medium
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Maximum (screen contrast at 150:1)
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reaction rate
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Slowest (unable to display animation)
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Medium (150ms)
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Fastest (40ms)
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display quality
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Worst
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Medium
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the best
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colour
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Monochrome or black and white
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Monochrome and Colorful
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color
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price
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The cheapest
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medium
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Most expensive (approximately 3 times STN)
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Suitable for products
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Digital displays for electronic watches, computers, various automotive and electrical products
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Mobile phone, PDA, electronic dictionary, handheld computer, low-end monitor
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Laptop/handheld computer, PC monitor, car navigation system, rear projection TV
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The difference between TN, STN, and TFT LCD screens
TN LCD display has a relatively low level of technology, low price, and a wide range of applications for small-sized products below 3 inches. It can only display black and white monochrome and perform simple article and digital displays. It is mainly used in consumer electronic products such as electronic watches, calculators, and simple handheld game consoles.
The STN type LCD display has a simpler process, higher yield, and relatively cheaper price compared to the TFT type. It is suitable for products with strong contrast and faster image conversion reaction time. Therefore, it is widely used in information processing equipment. If a color filter is added in front of the LCD panel, it can display multiple colors, and even achieve full color conversion. The product is mostly used for displaying text, numbers, and graphics functions, such as low-end laptops, handheld computers, stock machines, and portable products such as personal digital assistants (PDAs).
TFT liquid crystal displays have a faster display response speed and are suitable for animation and imaging display. Therefore, they are widely used in digital cameras, LCD projectors, laptops, and desktop LCD displays. Due to its superior color quality and reaction speed compared to STN products, it is also the mainstream product in the current market.
Shenzhen Ruxin Electronic Technology Co., Ltd. is a high-tech enterprise that has been developing for 13 years. It focuses on the research and development and production of high brightness LCD screens, strip LCD screens, small and medium-sized LCD screens, transparent LCD screens, and other products. It is a high-quality LCD screen manufacturer in China, providing one-on-one professional services to create long-term value for customers.
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