Dough hævder at have fået 240Hz BFI – med indhold i op til 120 fps – til at fungere på sin kommende 27-tommer OLED-monitor, der også er den første med blank skærmoverflade.

I december 2022 præsenterede Dough Spectrum ES07E2D. Den er bygget på samme 27-tommer WOLED-panel fra LG Display som andre 27-tommer OLED-gamingmonitorer på markedet. Doughs model er dog den første med AR-coating (blank skærmoverflade).


Første OLED-monitor med BFI
Dough er nu igen først ude med en anden funktion til OLED-monitorer; 240Hz BFI (Black Frame Insertion) til yderligere reduktion af pixelpersistens og slør.

- "Så i dag er vi glade for at kunne meddele, at vi med succes har implementeret BFI i vores OLED Spectrum i op til 120FPS, og vi vil fortsætte med at arbejde på det for at opnå den bedste ydeevne, vores skærm kan tilbyde," meddeler selskabet.

Det virker ved at indsætte et helt sort billede imellem hver opdatering af billedet, hvorfor Dough omtaler det som 240Hz BFI. I dette scenarie vil BFI fungere med spil i op til 120fps, idet hver anden opdatering reserveres til det sorte billede. Sort skærm imellem billedopdateringer nulstiller menneskets øje, så vi opfatter bevægelse med mindre slør på en (sample-and-hold) skærm.



Kan også bruges uden BFI
Hvis man ikke ønsker at benytte BFI, som har tendens til at flimre og reducere skærmens lysstyrke, kan man i stedet køre OLED-monitorer i 240Hz med fuld 240fps understøttelse i spil. Dough giver flere detaljer om deres implementering af BFI nedenfor.

Dough hed tidligere Eve og har ikke den bedste historik

27-tommer Dough Spectrum ES07E2D sælges på nuværende tidspunkt på forsalg til 750 dollars og lanceres offentligt i juli 2023 til 1100 dollars.

240Hz BFI on Dough Spectrum ES07E2D
In Dough's own words:

"Even though our panel cannot turn off the panel in between refresh cycles, we can still tell the pixels to turn off as part of a refresh cycle. By alternately sending the panel a new image frame, and then a fully black frame, the result is similar. This method of inserting black frames is appropriately called ‘black frame insertion’ (BFI). Blur Busters has an excellent Test UFO demo that simulates the effects of BFI on eye-tracking blur here.

The good news is that by working with our scaler manufacturer, we were able to successfully implement this alternate form of image strobing. The bad news is that this method is more limited.

For one, we are using actual refresh cycles to insert the black frames. The more black frames we insert, the fewer image frames we can show. So even though we have this working at up to 240Hz, we can only display up to 120 unique frames – the other 120 frames are necessarily black (Figure 7). This means that while BFI is active, Spectrum effectively behaves like a 120Hz monitor. Albeit a 120Hz monitor with very little motion blur!

Another limitation of this method is that we don’t have nearly as much control over that balance between brightness and blur reduction. With every other frame, image persistence is 50%, and that’s it. Our firmware team is working on settings that allow a new frame every third (Figure 8), or every fourth refresh cycle (Figure 9), with the frames in-between being black. This would offer settings for 33% and 25% persistence respectively, and would further reduce motion blur. Of course, this would now not only reduce the brightness, but also the maximum frame rate (in these cases, down to 80 and 60fps)."

 Illustration: Dough

"If that’s not your cup of tea, there is of course always the option to leave it off. Without BFI, you unluck the full potential of the panel with a 240Hz refresh rate and maximum brightness. That said, we are proud and excited to offer this implementation of strobing on our OLED monitor. Despite the limitations the results speak for themselves, and any game that doesn’t run at more than 120fps will look amazingly blur-free on Spectrum."
 Flatpanels