LG C9 BFI at 120 hz

[Clear Motion Seeker]

While i value clear motion like everyone else here, it's not a the cost of a severe brightness loss.

as we watch tv / games only in a fully darken room and light is a no issue for us, would the CX with full 120Hz suffice brightnesswise in a full darkened room?

In 120 Hz mode, CX and C1 are pretty much similar : 4 ms of motion persistence and more or less the same brightness level.

In 60 Hz the CX also displays 4ms but at the cost of a severe drop of brightness, whereas the C1 is brighter with 8 ms.

I read that the CX had more issues with black crushing, but i don't know if it's true or not.

[naylord]

Greyed out most likely.

I don't think i've understood your issue with the C9.

My issue with the C9 is that I don't know if my BFI is throwing out frames or not. I feel like to be able to tell I'd need a high speed camera that could detect that I'm still getting 120 unique frames while engaging BFI. The sparse documentation I've read on the LG C9s BFI is that it's limited to only 60 hz, and people have to resort to hacking their TVs to unlock some 120 hz BFI mode. Here's a source on that in the AV forum: https://www.avsforum.com/threads/2019-l ... e.3192676/

So yeah this whole thing is just super perplexing. Do you know of a good way I can test what my BFI is actually doing at 120 hz?

[Broxin]

While i value clear motion like everyone else here, it's not a the cost of a severe brightness loss.

as we watch tv / games only in a fully darken room and light is a no issue for us, would the CX with full 120Hz suffice brightnesswise in a full darkened room?

In 120 Hz mode, CX and C1 are pretty much similar : 4 ms of motion persistence and more or less the same brightness level.

In 60 Hz the CX also displays 4ms but at the cost of a severe drop of brightness, whereas the C1 is brighter with 8 ms.

I read that the CX had more issues with black crushing, but i don't know if it's true or not.

ah dang. yesterday i bought a 77" cx
i hope ill be happy with it somehow.

[Clear Motion Seeker]

Greyed out most likely.

I don't think i've understood your issue with the C9.

My issue with the C9 is that I don't know if my BFI is throwing out frames or not. I feel like to be able to tell I'd need a high speed camera that could detect that I'm still getting 120 unique frames while engaging BFI. The sparse documentation I've read on the LG C9s BFI is that it's limited to only 60 hz, and people have to resort to hacking their TVs to unlock some 120 hz BFI mode. Here's a source on that in the AV forum: https://www.avsforum.com/threads/2019-l ... e.3192676/

So yeah this whole thing is just super perplexing. Do you know of a good way I can test what my BFI is actually doing at 120 hz?

Honestly i don't know, my experience with this model is limited to having watched it in a store when it came out several years ago.
From what is said in this thread, it seems you can indeed activate 120 hz BFI mode through service menu.

[Clear Motion Seeker]

ah dang. yesterday i bought a 77" cx
i hope ill be happy with it somehow.

How much did you spend ?

[Broxin]

ah dang. yesterday i bought a 77" cx
i hope ill be happy with it somehow.

How much did you spend ?

1500€
Has some protective foils on it so it is in a good condition and has warranty until 2026

[Clear Motion Seeker]

ah dang. yesterday i bought a 77" cx
i hope ill be happy with it somehow.

How much did you spend ?

1500€
Has some protective foils on it so it is in a good condition and has warranty until 2026

Have you tried the BFI mode ? If so, is it bright enough for you and does it fit your expectations overall ?