Focus LCDs

What is a pixel? and are they only on graphic displays?

What does OLED stand for? and what is it better that other displays?

A pixel is made of three colors: red, green and blue. Each one of these colors is called a sub-pixel. The more pixels there are, the higher the resolution.

a hertz is how often something is refreshed. It is similar to a duty cycle. The higher the hertz rate, the sharper the image on many displays.

SPI and 4:1 is both good. one is not better than the other.

4:1 is lower cost, but cannot drive as many segments
SPI requires a controller/driver chip that increases its cost, but allows more segments to be driven and at a faster refresh rate than 4:1.

OLEDs require less power than a TFT, but in some cases they have a shorter half-life.

OLEDs don't need a back light that TFTS need. An OLED generates its own light.

IPS is a type of TFT. TFTS need to be refreshed. The faster/higher the refresh rate, the sharper the contrast. Passive TFTs are refreshed sevearal times a second, where active TFTS have one TFT per pixel so that is it always refreshed. (Active) IPS is where there are more than one TFT per pixel to o...

Refresh rate is a lot like duty cycle. How often it updates. There is a set number for refresh rate that matches the refresh of the human eye, so that people do not see a flicker.

There is no difference.

Monitor flicker is caused by a low refresh rate.