I am trying to understand the construction of an RGB TFT LCD that has brightness control in it.
I could not understand how does the TFT color LCD pixels glow? Does each of the pixel has its own light that it emits just like an LED or is it that there is a backlight bulb behind the TFT LCD screen and that bulb gives out the light that is passed through the transparent pixels while blocked by the opaque pixels?
If this is the case then how does the colors come on the TFT LCD? Are the colors due to the backlight bulb or the colors are in each of the individual pixels?
Edit: For example this LCD: https://www.alibaba.com/product-detail/High-brightness-1000cd-m2-5-inch_60312509314.html
Is there a single backlight bulb behind its screen?