What EL technology is this?
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  1. #1
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    What EL technology is this?

    Can some explain how the EL works on this watch? I can understand if it was a negative display, but it's not:

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  2. #2
    Member starscream's Avatar
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    Re: What EL technology is this?

    These are fake... Says S-Shock lol

  3. #3
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    Re: What EL technology is this?

    It can be called negative or inverted EL. Not sure what's the official naming. By the way, those are fake knock-off watches, do not buy!

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  5. #4
    Member Chempop's Avatar
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    Re: What EL technology is this?

    I believe a VERY small handful of real G-shcoks have that kind of inverted backlight on a positive display like the DW-5025D iirc.
    watch_geek2014 likes this.

  6. #5
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    Re: What EL technology is this?

    Quote Originally Posted by watch_geek2014 View Post
    It can be called negative or inverted EL. Not sure what's the official naming. By the way, those are fake knock-off watches, do not buy!
    I know it's fake. It retails for $14 online (shipped). Anyways, I though the EL was far more advanced than anything you'd find in most Casio watches. How does that work anyways, "inverted EL on positive display"? What's the science behind it?

  7. #6
    Member Mike K's Avatar
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    Re: What EL technology is this?

    Some genuine Casio watches -- even some older ones like this one -- have the same inverted backlight. My first attempt at a "lume" picture:

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    It probably has something to do with the alignment of the polarization film which makes the LCD digits appear in the first place.
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  8. #7
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    Re: What EL technology is this?

    Quote Originally Posted by hirobo2 View Post
    I know it's fake. It retails for $14 online (shipped). Anyways, I though the EL was far more advanced than anything you'd find in most Casio watches. How does that work anyways, "inverted EL on positive display"? What's the science behind it?
    I'm not 100% sure how it works, but I am sure it's not rocket science. My guess it's by adding some kind of polarization film in between the EL panel and LCD panel. That's how you have positive display and negative EL. By placing a polarization film in front of the LCD panel, obviously you get a negative display.

    Some Casio and Timex watches have those as well. Here are my 2 negative EL / positive display watches.
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    Here's how the Casio SGW100 looks (center).
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    Last edited by watch_geek2014; December 29th, 2015 at 23:18.

  9. #8
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    Re: What EL technology is this?

    Nice Sea Pathfinder, Mike! It's pretty rare to find one these days.

  10. #9
    Member Mike K's Avatar
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    Re: What EL technology is this?

    Quote Originally Posted by watch_geek2014 View Post
    By placing a polarization film in front of the LCD panel, obviously you get a negative display.
    Placing a polarization film in front of the LCD is how you get ANY sort of display -- turned one way you get a positive display, turned 90 degrees you get a negative display!

    Pictures #10 and #11 in this thread show it particularly well, as does picture #14 where there IS no film and thus no display at at all! https://forums.watchuseek.com/f43/how...ay-129102.html

    Quote Originally Posted by watch_geek2014 View Post
    Nice Sea Pathfinder, Mike! It's pretty rare to find one these days.
    Thanks! They are somewhat rare, but gently used ones still turn up from time to time.
    Last edited by Mike K; December 29th, 2015 at 23:26.

  11. #10
    Member Marrin's Avatar
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    Re: What EL technology is this?

    Quote Originally Posted by hirobo2 View Post
    I know it's fake. It retails for $14 online (shipped). Anyways, I though the EL was far more advanced than anything you'd find in most Casio watches. How does that work anyways, "inverted EL on positive display"? What's the science behind it?
    I have an old edifice that has a positive display, negative EL.
    I was impressed with that from day one(I received it as a gift) and I still think it is the best of both worlds!!
    I wish casio used it in more models, it really makes it more legible at night, especially if you just woke up in the middle of the night as it doesn't blind you like the positive EL
    GaryK30 likes this.

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