Blue Background and White Letters Negative Display STN LCD Screen for Electric Fan
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 STN LCD Screen.
Dr Pan: Hello, Greg. STN is the abbreviation for Super Twisted Nematic.
Dr Pan: The main difference between TN, HTN, STN and FSTN LCD is the view angle.
Dr Pan: From the definition, the maximum view angle of STN LCD is 210~255 degree.
Dr Pan: Take this STN positive LCD for example. The view angle is 12 o’clock direction and it can be seen very clearly in the full view angle: 12 o’clock direction, 3 o’clock direction, 6 o’clock direction, 9 o’clock direction and the front side.
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: we have two options for the background color: grey background and blue letters, yellow-green background and black/blue letters.
Dr Pan: When it is a negative and transmissive/ transflective display, it can’t display without LED backlight,
Dr Pan: the background is blue 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 a blue film to STN negative LCD, it may look like this.
Dr Pan: Actually, it is barely used because of the high price.
Dr Pan: The maximum COM is 64, so it is very suitable for the large dot-matrix (640*480), complicated and high-end devices.
Dr Pan: Thank you, Dr Pan. Now I got it.
Dr Pan: Welcome to contact us if you have any questions.