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My Own Invention

A project log for Random Ridiculosities and Experiments

Sometimes yah's just gots tah try somethin', regardless of whether it'll become a full-fledged "project"...

eric-hertzEric Hertz 06/16/2022 at 09:033 Comments

2:00AM Pacific Time, June 16, 2022

I hereby state that by my own invention, I lay claim to the idea of replacing LCD color filters with phospors, and using e.g. blue/UV backlighting, for increased brightness. Conversion of the incoming light, rather than blocking.

2:36AM

Also of my own invention, a separate idea of using a reflective polarizer on both the top and bottom of a backlit display, such that light blocked from the viewer at the front polarizer reflects back into the backlight for reuse. This differs from the use of only one relective polarizer at the backlight side of the display to reflect/reuse only the wrongly-polarized light coming from the light source, in that the second (front) reflective polarizer reflects light from the "dark" pixels back to the backlight, as well, rather than being absorbed by the front polarizer.

4:42AM

LOL, I spent at least an hour trying to figure out where I'd find phosphor to demonstrate this...

6-18-22:

Meh... it was not easy to find. But I found the patent. Application was in 2001(!). Surprised, even more, that I've never heard of it. And again even more than that by the fact its cited in 99 other patents, since. Seriously, how could this be so hard to find? Rather, how is it it's not already in products, or at least common-knowledge amongst folk like me that it is (or was) in the works? Heck, twenty years, you'd think there'd be a wikipedia page instead of one friggin' page for the patent near the bottom of a huge list of unrelated search results, and no other results regarding the 99 citations of it?! 

Well, I learned some things from it, anyhow... Yes, I was right (almost to the quote-level) about 2/3rds of the light arriving at the pixel being wasted. But, they went so far as to list percentage of light transmitted vs. light produced, which is roughly 10%!!! Meaning your display's backlight is ten times brighter than you see if the screen is fully white! Sheesh! No wonder they're hard to see in sunlight.

Discussions

Dr. Cockroach wrote 06/16/2022 at 09:24 point

Very interesting :-)

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Eric Hertz wrote 06/16/2022 at 09:46 point

Thanks. This is what the blacklight-era has brought about ;)

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Eric Hertz wrote 06/16/2022 at 11:35 point

Vids, now!

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