Which controllers and which system constellation would you recommend to create a TFT monitor ?
I'd look at HDMI Display Interfaces at
These only have single ended outputs, if you need true LVDS signalling then you'll need to use a LVDS driver such as ADN4665
So the system would look like this:
some kind of buffer amplifier for RGB analog in, then one of the HDMI controllers such as AD9888 and then an LVDS driver circuit plus a microcontroller for settings.
What about OSD menus: how to accomplish this ?
To me the thread title implied that you wanted to send VGA video over DVI to your TFT however your previous post indicates it's dual sourced, analog VGA and DVI. The AD9888 is not the best solution.
For the inputs you might look at the ADV7441A. It has both analog and HDMI inputs including embedded keys for HDCP. To be able to receive HDMI signals you'll also have to become a HDCP adopter. The HDMI inputs will receive DVI signalling just fine. DVI is just HDMI without keys or audio.
Doing OSD adds another twist. Analog Devcies offers the ADV8002 to do this. The ADV8002 requires NDAs.
The AD9888 only does analog to digital conversion, no HDMI
All these chips provide TTL/CMOS outputs. You will have to convert these single ended outputs to LVDS required by your TFT. One possible chain omight look like this.
|-> ADV7441A ->ADV8002->LVDS->TFT
First of all: thanks a lot for your detailed information !
The ADV7441A is also the one we discussed as the AD98xx are relatively old chips and don't support DVI. Yet the ADV7441 is a bit more complex.
The missing link was the OSD controller. So your information on the ADV8002 is a valuable hint and we probably have our system structure defined with it.
We'll design a first board and let's see into which pitfals we run ...
Anyway products from Analog Devices usually work fine.
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