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How does a screen work?

makingsoftware.com

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Re: How does a screen work?

#3
Not only was the initial diagram all/explaining, but the "pop"-"pip" on zoom-unzoom of the image was just as nice as playing with a sheet of bubble wrap.

Wow, and that ruler on the right side, even with the sound.

One of the nicest pages I have been on.

And the landing page... https://www.makingsoftware.com/

It just keeps on giving.

Re: How does a screen work?

#4
CRTs are still slightly magical to me. The image doesn't really exist. It's an illusion. If your eyes operated at electronic speeds, you would see a single incredibly bright dot-point drawing the raster pattern over and over. This YouTube video by "The Slow Mo Guys" shows this in action: https://youtu.be/3BJU2drrtCM?t=190

Re: How does a screen work?

#5
>The fact that they ever made it out of the research lab and into our homes is astonishing to me.

What is astonishing about LCDs? I don't mean to diminish the difficulty of scaling up the process, but if you think of early LCD displays they don't seem farfetched to be shipped to consumers.

Re: How does a screen work?

#6
Put a magnifying glass on your LCD display and you can see the sub pixel pattern...

A few decades ago I worked on a huge machine that made LCD color filters.

Re: How does a screen work?

#7
post #4

CRTs are still slightly magical to me. The image doesn't really exist. It's an illusion. If your eyes operated at electronic speeds, you would see a single incredibly bright dot-point drawing the raster pattern over and over. This YouTube video by "The Slow Mo Guys" shows this in action: https://youtu.be/3BJU2drrtCM?t=190

There is some persistence in the pixels/phosphor though so it's not a complete illusion. But yes, your eyes are integrating over the frame. There is also interlacing...

I read something interesting recent but I'm not sure if it's true or not. That as you age your integration frame rate decreases.

Re: How does a screen work?

#9
post #4

CRTs are still slightly magical to me. The image doesn't really exist. It's an illusion. If your eyes operated at electronic speeds, you would see a single incredibly bright dot-point drawing the raster pattern over and over. This YouTube video by "The Slow Mo Guys" shows this in action: https://youtu.be/3BJU2drrtCM?t=190

When I learned how TV worked at the beginning of television history, I found it super cool that the camera and all the TVs across the country had their scanning beams synchronized. That camera was driving your TV, almost literally.

Re: How does a screen work?

#10

>The fact that they ever made it out of the research lab and into our homes is astonishing to me. What is astonishing about LCDs? I don't mean to diminish the difficulty of scaling up the process, but if you think of early LCD displays they don't seem farfetched to be shipped to consumers.

One random example is that your eyes are extremely sensitive to the tiniest defect or variation. So making a large display that looks good and is uniform is very challenging. Not to mention scaling up all the various processes like the photolithography and working with very large and thin glass panels.

It's all engineering but it's surprisingly hard to move things from the lab to manufacturing at scale. Years and years and lots of problem solving. Some efforts/approaches fail and you never hear of them.

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