I don’t understand. When you say standard are you talking abour RGB instead of BGR or are you talking about Aperture Grill instead of Slot Mask - which is what you’re seeing in the example?
BGR Aperture Grill works just as well as BGR Slot Mask.
Based on how those TVs work there are never 4 subpixels on at the same time so if you’re using an application that has the Red, Blue and Green Subpixels active then there shouldn’t be a need for the white RGB to be turned on and one of the other colours turned off.
Even if we’re using a mask pattern like RRBBGGX, which uses 2 pixels for one phosphor colour and we want to produce white, then the Red subpixel in the first and second pixel would be active with the blue, green and white turned off, the blue would be active and the others turned off for the 3rd and 4th pixel, the green active and the others off for the 5th and 6th pixel and for the seventh pixel all will be inactive.
This is all that is needed to produce white using a CRT Shader Mask. Why would there be any need for the white subpixel to come into the picture when you’re trying to produce red, blue, green and black?
As we can see from images I shared when the TV wants to produce white in the traditional way it can definitely use that white subpixel to have a pure, bright white.
Fortunately for us, CRT Shader Masks (pure mask simulations i.e.) don’t use white to produce white.
I’m just speaking from my personal observations and experiences by the way, not trying to provide any expert scientific advice.
Take a look at this image here to see what’s really going on with these WRGB subpixels.
I’m seeing blue, green and red adjacent to one another followed by the white subpixel which can be anywhere from white to grey to complete black. This represents an entire pixel. it might look look it’s wide and spread across a large area but do we really appreciate how tiny this one pixel is and how microscopic the distance across is from the leftmost subpixel to the rightmost?
Also take into consideration that as each subpixel is activated it will emit a glow. I have a feeling that unless you have some specialised equipment it would be near impossible to tell if the glow is coming from the left, right or center of the pixel.
That image was taken from this article below. It’s the only one I’ve found where they’ve composited it in a way that shows all of the OLED subpixels active at the same time.
This is another lovely photo showing WRGB OLED TV pixel structure taken from a website that you can subscribe to for the latest news and information regarding OLED and other emerging display technologies.
This is from a much older early Full-HD TV so the layout seems a bit different from what we have today.
https://www.oled-info.com/lgs-wrgb-oled-tv-sub-pixels-captured-macro-photo