Color Depth Quality of Image

How to
1

What do you want to achieve?

I have a ESP 32 S3 based 4.3 inch TFT LCD IPS 800 x 480 device from AliExpress. I’m not sure if it can support 32 color bit depth or not, but the ESP32 square line project template has a bit depth of 16.

The image I want to use has 24 bit depth, and when I include it in my squareline project and run the firmware on my ESP32S3 LCD TFT - it displays the image in pixellated format - and looks terrible.

But I can only seem to convert the image to reduce the bit depth to 16 colors using software (gimp).

Has anyone any advice on using back ground images ? Is this the right thing to do reduce the bit deptch to 16 ? And whats the best way to do that ?

What have you tried so far?

Paint, Gimp, Irfan view etc. and also changing code to try to use 32 bit deptch (didnt work)

Screenshot or video

I cant upload the bmp with 24 bit color depth - “file type not authorized”

Others

  • SquareLine Studio version: 1.3.0
  • Operating system: Windows 10
  • Target hardware: ESP32S3

My hardware is this one - IPS capacative touch

- AliExpress

2

You really should check the datasheet of the LCD Screen, since its hardware interface may only support RGB565 or RGB666. Higher bit depth requires more parallel data pins.

3

Thanks for the response, I did ask for a datasheet and obviously the supplier doesn’t have one (a shop on AliExpress), and they also do not know the supported color formats of the LCD screen. I am going to just try with different formats via LVGL and see what happens when I upload different image types.