Does any of this stuff mean it might be possible to fix the 8ks upscaler?
1 Like
Nop 
Improve perhaps. As @lonetech said it comes down to sub pixel rending. Oled Pentile has an algorithm that helps with rendering on on phones that improves things like font rendering.
Upscaling though will suffer the same as it does on TVs when inputting lower resolutions that are upscaled. Simple truth nothing will be as good as a native input.
But it is not necessarily as bad as folks think that haven’t seen it. If you have seen the v2 or v3 then you have an idea.
3 Likes
Your bravery in opening and dissecting your new HMD is much appreciated.
8 Likes
I found the spec for this one:
BOE VS055QHMNH069P0 LCD 2560*1440 5.5" 60Hz “RGB Vertical Stripe” 5k?
3 Likes
Remember that spec sheet figures are the standard ones, when you work with the constuctor you can exceed the standard specs once they tell you how.
This is the same for panels, @neelrocker found that the 8k has a forced mode that can support up to 90Hz.
1 Like
So why is 90hz disabled on 8K? Because they know even a 2080 TI can’t run it smoothly?
If so, hopefully it can be software enabled in the future via an official update.
1 Like
The panel supports 90Hz. We all know that.
The problem is the scalerchip, which operates at the upper limit of its spec. So the scalerchip limits the 8k to reach 90Hz
Maybe but driving two 4K monitor @60hz clearly exceed the nominal ANX7530 specs
(6.75Gbps per lane max) wouldn’t by wise to build a commercial product by overclocking more than 10%
further more their was much discussions here about the DCS compatibility of the display port implementation of the 7530. if it was possible I think Pimax would already have done it.
The 7538/39 is a better candidate specs clearly state that VESA DSC v1.2a (v1.1 compatible) is certify on DP the input side with 1:3 compression. it should be able to drive two 4K screen@ 60hz… but driving 2 panels is not the same has drive one
2 Likes
What’s important, is “up to”. We probably won’t know exactly why it’s not stable at 90Hz, maybe you need too high voltage, maybe you need to dimm the screen too much, maybe it runs too hot? It’s really technical details that Pimax needs to keep for themselves.
2 Likes
Seeing ANX7530 in the firmware does not mean it’s the component used, it’s maybe the same way to drive any of ANX753x series. Sometimes there is no difference between ZZZ1 and ZZZ2, just licensing, price and some init parameters.
2 Likes
Pimax already confirm that they use the 7530 in the 8K and the new chip 7538/39 only enter in production in Q1 2019. the native 7530 is not pin compatible with the 7538/39 currently the 7530 is about the only chip for those devices example the prototype of the Valve.
Would be very surprise otherwise, it could be the alleged 7530 VH ( pin compatible with the 38/39) in the PImax 5K+
quote:
ANX7538/39 samples are available in Q3 2018 and will ship in mass production in Q1 2019. Existing customers wanting to migrate to ANX7538/39 can use the ANX7530VH, which is pin-compatible and is available now.
3 Likes
The second those ODG r9’s surpass 110 fov I’m selling gallbladders on the grey market to get them.
Maybe the 8k has two ANX7530? We’ll know when someone will be able to fully disassemble one 
With the price difference they charge vs the 5K+ I hope so 
But na, would already be a 8K-x then Maybe we just have to solder the second connector
1 Like
To get 90 Hz out of the 8K panels you’d need to overclock the panels and the upscaler. Sometimes that requires more voltage for stability which will decrease the working life of the components and generate more heat (might contribute to reports of HMD running hot). And often overclocking displays throws your colors out of whack and can introduce artifacts (EDIT: not related to 5K+ dots apparently).
But no matter what, running through the scaler will increase the latency. If the entire frame can’t be delivered in under 11.11 ms, you won’t get 90 fps
/ Hz. We’ve long assumed the reason the 8K runs at ~80 Hz is the scaler for this reason.
5K+ dots are used to increase contrast, see:
https://community.openmr.ai/t/about-60-70-performance-improved-on-rtx2080ti/9072/12
3 Likes
How do dots increase contrast?
1 Like
I don’t know, you should ask PimaxVR on the topic I linked.
1 Like
“Contrast of colors”, only Pimax knows what does it mean.
2 Likes