Indeed there is something I don't understand. The panels that I have, come from old laptops and the only connector available is LVDS. Also, there is already a board on the display itself that probably house a lot of logic. My assumption was that this board is already taking care of what you mentioned above, or at least par of it. Tell me if I'm wrong but I think with my panels, I just need few steps to make them work:

1. plug them to power ( voltage depends on the panel )
2. plug the LED power ( voltage depends on the panel )
3. Send a pulse for settings the brightness of the backlight
4. generate suitable LVDS signal over 3 channels for the colors of each pixels ( can be all '1' to make it white )
5. Manage the h_sync, v_sync, and all the blanking signals ( maybe not, I saw that one of the panel doesn't even need the h_sync, v_sync )
6. And the clock signal

What do you think ?

The 'glass' controller that drives the physical display board at the needed gate-structure specifications is usually separate from the display controller board.
https://www.usmicroproducts.com/sites/default/files/datasheets/USMP-G121SN01 V4_0.pdf

I assume you want to build something to drive the panel 'glass' controller in a minimal manner to make it do 'something'. I don't know what the minimal set of display signals are that you would need.
https://www.nxp.com/wcm_documents/t...e/Presentations/graphics.lcd.technologies.pdf


https://www.amazon.com/Controller-HSD100IFW1-CLAA089NA0ACW-1024x600-30Pins/dp/B06X9CVB4Q

 

......to create a simple controller board for my panel, to learn about electronics.

I think the real point we are all trying to get across to you is that the word"simple" does not really apply here. There is no doubt it can be done, but as you are saying you want to learn about electronics, I can only surmise you are not really expert in the subject. The details of driving an LCD like this are not really simple. It offten can appear so as the boards used may not have a great deal on them, but there is much going on inside the chips driving the display. To make one yourself has a fairly steap learning curve, and I would not attempt it myself, evan after many years of designing industrial control equipment. And a lifetime of playing with electronics.
I do wish you luck, and hope you can accomplish it.