Hi all,

May I know why some LCD use UART like this model (https://itead.cc/product/4-3-nextion-intelligent-series-hmi-touch-display-without-enclosure/) and some lcd use RGB interface like this model (https://www.microchip.com/en-us/development-tool/DM320005-2)

may I know what is the difference between both of these models?

Below is provided pic32 multimedia display datasheet

Thanks

 

I cannot think of a good reason except some cars have manual gear shift while others have automatic.

There was a time when all printers used 25 pins or more connections and now maybe it is down to two wires.

Maybe chalk it up to more high level embedded intelligence in the interface/protocol and fewer electrical connections required.

 

Another answer could be as follows.

If you had a 640 x 480 pixel graphics display, how many bytes would you need to send in order to show the character “A” in a 5 x 8 character font?

Or could you accomplish the same thing with a single byte?

 

UART (or similar serial interfaces like I2C) displays use less processor pins but the display update is slower than a full parallel interface that uses more pins. So, it depends on your application needs and hardware.

 

Hi all,

May I know why some LCD use UART like this model (https://itead.cc/product/4-3-nextion-intelligent-series-hmi-touch-display-without-enclosure/) and some lcd use RGB interface like this model (https://www.microchip.com/en-us/development-tool/DM320005-2)

may I know what is the difference between both of these models?

Below is provided pic32 multimedia display datasheet

Thanks

The UART model is designed for quasi-static Human interface updates. It has a front-end processor that simplifies interaction (using a set of commands) but with slow screen updates. It's not a problem if used in the correct user domain.

This is what's possible with the PIC32 multimedia display that has direct programming access to a GPU. It's great but you don't need that for a weather station interface.
https://github.com/mhtmhn/PIC32DOOM

 

The UART model is designed for quasi-static Human interface updates. It has a front-end processor that simplifies interaction (using a set of commands) but with slow screen updates. It's not a problem if used in the correct user domain.

This is what's possible with the PIC32 multimedia display that has direct programming access to a GPU. It's great but you don't need that for a weather station interface.
https://github.com/mhtmhn/PIC32DOOM

what mean by quasi-static Human interface updates?

 

what mean by quasi-static Human interface updates?

The display mainly (maybe with some slow background animation) updates static graphic structures (icons, button keypads, images, etc...) due to human input. You can't push real-time interactive video to the screen.

 

The display mainly (maybe with some slow background animation) updates static graphic structures (icons, button keypads, images, etc...) due to human input. You can't push real-time interactive video to the screen.

Does the real-time interactive video mean the image transfer rate? can pic model do real-time interactive video?

 

Does the real-time interactive video mean the image transfer rate? can pic model do real-time interactive video?

The image transfer rate depends on the video format, compression rates, resolution and raw interface speed. A PIC32MZ graphics controller can handle the low end of interactive video.

 

this model (https://itead.cc/product/4-3-nextion-intelligent-series-hmi-touch-display-without-enclosure/) only can use as HMI cannot run any graphic video ?