TFT displays with MCU interface generally have an interface with the "TE" signal. The TE signal is an output interface that can provide normal display even without being connected to the MCU.
The TE (Tearing Effect Signal) is a feedback signal from the TFT controller to the MCU. Its function is similar to the FLM (First Line Marker) signal of the past liquid crystal module of monochrome style.
The TE signal is sent from the TFT controller to tell the MCU that it is "starting" to read RAM from the first line and display it. The goal is to avoid conflicts caused by the TFT controller reading RAM data while the MCU is writing data to the same location, which often results in a garbled display.
Situation 1:
For high-speed MCUs with a frame rate of about 1/60 second, the MCU updates the display content of the entire frame faster than the display controller scans (reads) a frame. When the MCU sees the T signal, it starts updating (writing) the display content, and the relevant updates will not conflict with the display controller scanning (reading) RAM. Therefore, there will be no garbled display due to RAM read-write conflicts.
Note that the relevant update (writing) action starts just after the display controller scanning (reading) has just completed.
Situation 2:
For slower MCUs with a frame rate of about 1/60 second, the MCU updates the display content of the entire frame slower than the display controller scans (reads) a frame. When the MCU sees the TE signal, it starts updating the display content. As long as the MCU's updating speed does not exceed two frame times, it will not conflict with the display controller scanning (reading) RAM. Therefore, there will be no garbled display due to RAM read-write conflicts.
Note that the relevant update (writing) action starts just after the display controller scanning (reading) has just begun.
Exson provides touch and display integration solutions with OCA, OCR optical or air bonding to meet your specific needs. We also integrate driver boards with different inverters such as HDMI, VGA, Lvds-mipi, eDP-Lvds into integrated units.
We LCD display module supplier also support open framework design and manufacturing, including metal frame components, LVDS/ eDP/ FFC/ FPC/Ipex cables, and can provide custom cables according to requirements. If you need any other LCD parts and materials for support, our friendly team is more than happy to help.
Beyond the Screen: The Impact of Medical LCD Displays in TelemedicineDecember 8, 2023In an era where technology is reshaping the landscape of healthcare, telemedicine has emerged as a powerful tool, connecting patients with healthcare professionals regardless of geographical distances...view
The Application Fields of LCD Bar Type LCD ScreenAugust 4, 2023With the rapid development of TFT LCD screen technology, there are more and more types of screens with increasingly powerful functions, presenting themselves in various poses and shapes, satisfying ou...view
Perspective Selection for Industrial LCD ScreensJune 30, 2023We will discuss the viewing angles of industrial LCD screens and how to choose the appropriate viewing angle for your project.Overview of viewing angles for industrial LCD screensScreen viewing angle ...view
Touch Screen Monitor Maintenance MethodDecember 29, 2021In today's rapid development of technology, professional touch screen monitors provide great convenience for our work and life, but also make people more and more inseparable from it. Now the cost...view
Enhancing Your Drive: The Power of Car LCD ModulesOctober 23, 2023In today's technology-driven world, our cars are becoming more than just a means of transportation. They are evolving into sophisticated hubs of connectivity, entertainment, and information. One o...view
High-Quality TFT LCD Display Modules in Interactive LearningDecember 8, 2023In the dynamic landscape of education, the integration of cutting-edge technology has become a catalyst for transformative learning experiences. Among these innovations, high-quality TFT LCD display m...view
Call us on: 
Email Us: 
2F-M1 XiaWei Industrial Park, GuanLan, LongHua District, SZ, China 
www
