Grey Background and Blue Letters Positive Display FSTN LCD Screen for Air Conditioning
Dr Pan: Welcome to DISPLAY Museum. I am Dr Pan, the curator of Museum.
Greg: Hello, Dr Pan. I am Greg. I came here to learn about FSTN LCD Screen.
Dr Pan: Hello, Greg. FSTN is the abbreviation for Film Super Twisted Nematic.
Dr Pan: The main difference between TN, HTN, STN and FSTN LCD is the view angle.
Dr Pan: FSTN is the advanced version of STN with one compensation film, the view angle is better.
Dr Pan: It has the true 360° full view angle.
Dr Pan: When it is a positive and reflective display, it can display without LED backlight;
Dr Pan: when it is a positive and transmissive/ transflective display, it can’t display without LED backlight,
Dr Pan: the background color could be grey-white or grey-green,
Dr Pan: and the letters could be black/purple/blue.
Dr Pan: When it is a negative and transmissive/ transflective display, it can’t display without LED backlight,
Dr Pan: the background could be dark-purple/ blue/ black (not pure)
Dr Pan: and the color of the letters is the color of LED backlight.
Dr Pan: By the way, no matter it is a positive or negative display, the background color is affected by the color of LED backlight on some level.
Dr Pan: That is why the color of LED backlight is usually white.
Dr Pan: Theoretically, we can add one more compensation film to FSTN LCD,
Dr Pan: it becomes DFSTN (Double Film STN) and the view angle is better.
Dr Pan: Actually, it is barely used because it is too expensive.
Dr Pan: The maximum COM is 128, so it is very suitable for the large dot-matrix (640*480), complicated and high-end devices.
Greg: Thank you, Dr Pan. Now I got it.
Dr Pan: Thank you, Dr Pan. Now I got it.