Weird Colour Liquid Crystal Display 

Fascinating, thank you.

@@JanusCycle The give away here it may be that all the screen has a pinkish tint. Normally, at extinction (i.e. the condition at 4:08) one has the field black, set-up up also referred to cross-polarization. If you add to that a full wave filter (the lambda above) you'll turn the field red-violet. If you put a birenfringent transparent object in-between polarizers with sharp boundaries and flat enough, you'll see a characteristic color dependent to the object's orientation, and that's not true colors but an interference one. Quartz works best as the object above. Rotate that object between the polarizer between 0-90 degrees and you'll get the tints you see here. One more thing here, the lcd assembly is off the extinction position, likely at 45 degrees. That's why you have those dull tints.

@@JanusCycle The acrylic demo does not stand as a proof. That is stress bi-refringence, the material is not bi-refringent. You get that effect when you push the lcd with the finger, though glass needs more stress to make it permanent.

@@ciprianpopa1503 This is quite a detailed explanation you have provided, thank you. I get the impression this effect is generally not well understood outside of the expert knowledge realm. I greatly appreciate you sharing these details here on how this colour is being produced. I have pinned your comment for others to find. Thank you for sharing your knowledge.

@@JanusCycle as you pointed out, this is basic knowledge in polarized microscopy. However, that's only a guess. It may use some other effect, like kerr effect. But that would require a strong electromagnet. A Lyot monochromator could be also employed, but that would harder to achieve economically. A Lyot would also able to achieve full color (also interference) spectrum, and that it's not obvious here.

Huh? Other way around, he shows Posy's video on screen.

@@AiOinc1oh whoops.. but you gotta admit the presentation style is very similar in this video..

The voice and accent here is way better IMO. Other guy is good tho

I'm glad you found this channel and are enjoying the videos :)

That is such a beautiful compliment, thank you. Posy is completely amazing and I love his videos. I would do a poor job if I ever tried to copy him. I can only make my own videos and it's so nice to hear that people like them. Thank you.

came here to comment about some siemens phones having this type of display

and Siemens S25 too

The Pokemon Pikachu 2 also had a color display like this

@@Fuzy2K I heard of that item and have been aware that it has this sort of display but never seen one of them in person.

I think you are right.

Siemens S25 had similar color display to this one. And S11 Power too iirc.

Thank you, I'll keep doing my best. Thanks for watching!

We didn't get colour tv here until the mid 70s!

I'm glad you are getting a close up experience of this tech. There are some models of the 9850 than can double the memory with a small mod.

Glad you dug this one. This was fun to explore.

Thank you.

I had one too. Used it in classes and the notes feature to write equation for tests :)

Casio also used this on some of their pocket databanks. And Siemens used this in some old mobile phones. But I've never seen this technology from other manufacturers.

I took the time to closely hear how people say bi-refringence and you are correct. I didn't pronounce this properly. With the Australian accent we generally don't have strong 'R' sounds when we speak. This is not an excuse, I still made a mistake. Just one of the many things I have learned from making videos. Thanks for watching and enjoying and especially for commenting, thank you.

@@JanusCycle don't sweat it. You have a very pleasant accent and voice.

Very interesting, thank you!

Awesome, glad you are having fun!

I think you are correct, would love to see one of those Siemens one day.

Thank you, I love well placed music in videos. Something I want to learn to do more of over time.

Nice, Dogslife is well worth it, a very engaging personality.

It's been a low key affair. I kinda like that Patreon is a bit more chill. I will mention it a bit more though, thanks. I appreciate your feedback and glad to hear you are enjoying the channel :)

Thank you. I have been learning to do better audio.

That's a really good question

Very possible.

Yes it does. It never fails to mesmerize me how it made non rgb color lcd possible!

Most likely yes. I do have the Siemens S10D in my collection and the display looks pretty much identical to the one from the Casio calculator

"By no means similar" is a gross exaggeration. The "dots" are still red, green, and blue, and must be organized to match the divergence angle of the shadow mask. Color is still produced by varying illumination of each "dot" from the other "dots" near it.

Cool, I really like those Sharp MIP displays as well. I want to get a Playdate games console one day because they use this display technology.

Interesting idea, but at this point you're already making a Micro LED screen by itself, may as well just have the LEDs and be done with it.

@@Kalvinjj Well, I see your point I hope they find a way to make LEDs change colors without filters or subpixels Saturday, April 15, 2023 CE, 16:46 EDT

@@mcwooley there exist 3-in-1 RGB LEDs as is, some able to individually control the brightness of each component, so they just need to shrink those!

I just checked it out. That is really cool, I want one now. Thanks for letting me know.

@@JanusCycle I've had mine since around 2001. It got washed a long time ago, it still works, but the screen has a blank horizontal line and vertical line. I've been trying on and off for many years to try and get it working right. I've never seen anything else use that type of color screen until saw this video.

Yes, I'm confident it is. I still need to get an S10 or related Siemens model to confirm this.

yeah it’s true, the displays tend to get overvolted by forcing them to make blue

I greatly appreciate the corrections and new things I learn from comments. Thank you for this.

@@JanusCycle Oh shit I've just noticed a pinned comment saying the same! Sorry!

@@greenaum No need to apologise. It was pinned because it's important. Your comment adds weight to that importance and I thank you.