TN 、IPS、 VA Which display should i use for my product？
IPS, VA, TN and OLED? If you want to understand an industry, one of the best things to do is to understand the basics. In the case of LCD display, that means different display modes, each with its own unique advantages.
Some products need special use environment, such as strong light, very high or very low temperature, so it is important to choose the right display screen.
We hope to give you a deeper understanding of which display is suitable for your product.
What is IPS?
IPS is the abbreviation of in-plane Switching, all the driver circuit In the TFT substrate side, has the corresponding speed, large visual Angle characteristics. This display mode can be seen everywhere in our daily life, such as smart watches, mobile phones, tablet computers, monitor, POS machines, advertising machines and so on.
Because of the special design of the IPS display, the liquid crystal molecules are arranged horizontally, and the screen will not change significantly when the external force is received, so the IPS display is particularly suitable for the full fit of the touch screen or cover glass.
What is VA?
VA is an abbreviation of vertical alignment. VA belongs to TN display mode. It can be subdivided into MVA (multi-domain vertical alignment) and PVA (patterned vertical alignment). Both displays use materials to change the alignment of liquid crystal molecules, but the alignment of liquid crystal molecules is different.
The VA display mode is normally black, that is, black is displayed when the device is not working. The special design preserves the advantage of the TN display mode’s fast refresh rate and improves the viewing Angle. Due to low manufacturing cost, fast refresh rate and acceptable perspective, it has been widely used in the field of display. Most of the current computer monitors, televisions, advertising machines and so on are VA displays.
What is TN?
TN is short for Twisted Nematic. On the basis of TN display mode developed HTN, STN, FSTN and so on. The TN display mode is normally white. That is, the TN display mode is white when it is not working. TN display mode is simple in structure and fast in response, but the Angle of view of TN display is small due to the tilted arrangement of liquid crystal molecules. Moreover, when the display is pressed, the liquid crystal molecules slide along the Angle, resulting in a noticeable disturbance in the picture.
TN display has low manufacturing cost and fast response speed. It is widely used, such as calculator, multimeter, intercom, telephone and so on.
segment LCD, graphic LCD is also a TN display mode LCD.
What is OLED?
OLED is the abbreviation of Organic Light-Emitting Diode. It is divided into PMOLED (Passive matrix OLED) and AMOLED (Active Matrix OLED). PMOLED is generally a monochrome and low-resolution product. AMOLED is a color high resolution product using SPI or I²C interface.
Which LCD display is best?
Each of these display mode displays has its own advantages and suitable products, so they are very useful. Which mode of LCD you should use depends on what the product is. Different industries use different TFT LCDS for different applications.
To ensure you choose the right type of LCD, consider your purpose first.
Whether it’s gorgeous color, high resolution or durability, each display has its own unique advantages.
Beauty instrument products
The cosmetics industry uses displays to make products more intuitive and sell more. The display screen has become a new means of human-computer interaction, which can display the working state, parameters, etc., and can also be directly controlled by touching the touch screen.
The most commonly used in the industry are LCD, OLED products and serial control LCDS. The low-resolution monochrome OLED module is easy to drive, consumes less power and is durable. While the serial control LCD can be selected from 2 “to 10”, the beauty instrument only needs to send a simple command through the RS232/RS485 serial port to control the serial control LCD to display a gorgeous picture and can support the touch screen.
LCD screens are used in the cosmetics industry. They are very durable and specially designed to work stably in the environment of sun exposure, high temperature and humidity, and strong electromagnetic interference.
Multifunctional food processor
Multifunctional food cooking machine is particularly popular now, you only need to put the ingredients, cooking machine can be set according to the program for mixing, cutting, heating, etc., with a can display recipes and adjust the working state of the screen will undoubtedly improve your equipment greatly.
Serial control LCD is particularly suitable for upgrading the original cooking machine without display screen into one with touch and display functions. Your cooking machine only needs to issue instructions through the serial port, and the serial control LCD will display the corresponding contents according to your requirements. At the same time, the touch screen can receive signals to send the customer’s intentions to your processor.
Medical care instrument
The segment LCD is generally used for medical and healthcare instruments based on different display contents and functions. For example, the blood pressure meter, blood glucose meter, and blood oxygen meter only need to display simple ICONS and numbers, and the instrument is small and has low power consumption. When large medical devices are used, IPS and VA displays will be used. The large size of the device itself and the strong processing power of the processor will make high resolution and large size display suitable.
Small meters and handheld devices
Nowadays, mobile phones are becoming more and more powerful and people can’t live without them. Handheld devices usually have powerful processors, such as Qualcomm and chip and Mediatek masters. These masters can support SPI, MIPI, eDP and other interfaces, so high resolution IPS displays are preferred.
For the sake of power consumption and CPU performance, such as segment LCD and graphic LCD’s TN display and PMOLED are very suitable.
Educational products
Educational products accompany children for a very long time, such as tablet computers, children’s learning machines, monitors and other products. Because of the blue light of backlight unit, LCD products will cause dry eyes and swelling for a long time. Eye protection display achieves the purpose of eye protection by controlling the brightness of blue light through customized backlight. At the same time, the surface of the protective cover plate or the touch screen can be treated with anti-glare, so that the light is softer and protects the eyes.
Outdoor display products
Outdoor display is a big challenge to display products. Due to the strong light outdoors, the display with a brightness of only 300nit becomes dim. If you want to use the display outdoors, the brightness of the display should be less than 1500nit or even 3000nit, or use the display with half reflection and half projection. The display is specially designed to reflect some of the sunlight, which increases the brightness and gives a good result.
conclusion
Which display to use depends on your product and environment.
If you need high resolution, high brightness, large viewing Angle, high contrast, high gamut and support for touch, then IPS type displays are your first choice.
If you have low requirements for viewing angles and contrast, color gamut, etc., and are more price sensitive, then a TN type LCD display is the right choice for you.
segment LCD or graphic LCD is for your device if your processor doesn’t support MCU, SPI, or MIPI interfaces. Another way to use a TN or IPS type display is to apply serial control LCD, a module that is self-driven and you can control it with simple instructions.
