(Topic ID: 155542)

LED help: purple


By PunkPin

3 years ago



Topic Stats

  • 26 posts
  • 17 Pinsiders participating
  • Latest reply 3 years ago by nman
  • Topic is favorited by 3 Pinsiders

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    IMG_20160322_215151_(resized).jpg
    IMG_0980_(resized).JPG
    baywatch_(resized).JPG
    image_(resized).png
    blue-purple_(resized).png
    purple_(resized).png
    20160313_091207.jpg
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    3-22-2016_12-46-06_PM_(resized).png
    IMAG0223_(resized).jpg

    #1 3 years ago

    Been looking around and sampling some LED to add in some inserts. Bought some to test colors and decided on one I like but when I ordered the rest needed they were a different more pinkish purple.

    I know it's hard to tell from picture but can anyone recommend a bulb that is a true purple color closer to the top insert?

    IMAG0223_(resized).jpg

    #2 3 years ago

    I've heard that comet has the best purple. Never tried it though.

    #3 3 years ago

    Comets purples called "purple passion" are the best imo. I believe he even has pix of the shadow as his demo pix. There is a thread about them on here

    #4 3 years ago

    Yes, comet's purple passion are by far the best of the several that I've tried.

    #5 3 years ago

    Here is the direct link on comet's website:
    http://www.cometpinball.com/product-p/2smd-ppc.htm

    3-22-2016_12-46-06_PM_(resized).png

    3-22-2016_12-46-21_PM_(resized).png

    #6 3 years ago

    You need a Mongol standup more than you need to fix your purple LEDs!

    #7 3 years ago

    I have found that "UV" bulbs are the "purplest". i've heard some people say they are not bright enough, but they work great in the places i've used them. (i haven't noticed any "black light" effects with them)

    #8 3 years ago

    I used comets purple passion in inserts and some gi. Definitely deepest purple I've seen. Pic attached doesn't do it justice

    20160313_091207.jpg

    #9 3 years ago

    it seems to me in order to get the purple people want, bulb builders simply need to put more blue and less red into whatever they use to color the bulb. when the light shines through it, most purple bulbs come out looking pink. there's a good reason for this, which i will attempt to illustrate.

    check out this image:

    purple_(resized).png

    The top half of the image is standard purple -- 50% red, 50% blue, half brightness. (The RGB values are 128/0/128). The bottom half of the image is what happens to that color when brightness is doubled -- my attempt to show what a bulb of that color looks like when lit up. "Lit purple" basically looks pink, which is also what we are seeing in the real world when most purple LEDs light up, and why we hobbyists are so often disappointed with them.

    Now look at this image:

    blue-purple_(resized).png

    This is a very bluish-purple color, with twice as much blue as red (RGB value is 64/0/128, aka "indigo"). The bottom half of the image is that color with the brightness doubled, my attempt to show what a bulb of that color would like when lit. In my opinion, that color is closer to the shade we are looking for in our purple bulbs.

    keep in mind it is impossible to "project darkness" so it's not actually possible to make a "dark purple" light. The current problem is not in its brightness vs darkness, but that manufacturers are using a hue that leans too much towards red, and not enough towards blue. that's why they look pink when lit.

    I believe a more blue-purple bulb would make purple inserts look exactly like what people want.

    #10 3 years ago

    Have to echo everyone else and go with Comet. You won't be disappointed

    #11 3 years ago

    Sorry Pez, Its not a matter of simply remixing the ratio of blue vs red.
    As a single light source, the more of blue or red, just makes it more blue or red and not purple, as you mentioned.
    It still comes out pink, bluish, or impossibly dark, and inserts may be white, as well as pinkish....that people want purple.
    More recently games like IM have a rich purple insert, and the effect is seen less here, so this does support and agree with your contention.
    The solution was a purple cap with a brighter diode.
    Another solution were 3 diodes +, mixing individual colors, but twice the price....and we all know no one wants to pay more.

    It took 9 months, around 60 iterations of powder trial and error and 8 tries on the lens to get right.
    Cost me more to do, then a Premium GB, so its around a 7-9 year payback.
    Not exactly a good business financial decision, but I wanted it, everyone wanted it, and a positive product was the result.
    I kept it priced only pennies more then regular......

    #12 3 years ago

    Art, I have no choice but to accede to your vastly superior first hand experience on the subject! keep up the great work.

    #13 3 years ago
    Quoted from OLDPINGUY:

    Sorry Pez, Its not a matter of simply remixing the ratio of blue vs red.
    As a single light source, the more of blue or red, just makes it more blue or red and not purple, as you mentioned.
    It still comes out pink, bluish, or impossibly dark, and inserts may be white, as well as pinkish....that people want purple.
    More recently games like IM have a rich purple insert, and the effect is seen less here, so this does support and agree with your contention.
    The solution was a purple cap with a brighter diode.
    Another solution were 3 diodes +, mixing individual colors, but twice the price....and we all know no one wants to pay more.
    It took 9 months, around 60 iterations of powder trial and error and 8 tries on the lens to get right.
    Cost me more to do, then a Premium GB, so its around a 7-9 year payback.
    Not exactly a good business financial decision, but I wanted it, everyone wanted it, and a positive product was the result.
    I kept it priced only pennies more then regular......

    Yes, I have used them and really like them. Thanks for all the work.

    #14 3 years ago

    I hope you didnt take it wrong Pez....I went down that path and made me crazy, because you are right....except, its pinball!

    All Good!

    Working on a new color I hope to test this week.....

    #15 3 years ago

    Damn that much money to develop a purple LED. I need to add a few to my next order

    #16 3 years ago
    Quoted from OLDPINGUY:

    Working on a new color I hope to test this week.....

    Sweet!

    #17 3 years ago
    Quoted from OLDPINGUY:

    I hope you didnt take it wrong Pez....I went down that path and made me crazy, because you are right....except, its pinball!
    All Good!
    Working on a new color I hope to test this week.....

    can't wait! was just about to pick up a bunch of your Matrix stuff. looks like a lot of fun to play with ...

    #18 3 years ago

    Yes, Art worked really hard and almost went crazy (crazier?) trying to get a "purple purple."

    #19 3 years ago

    So comet purple is the best?

    #20 3 years ago

    thanks everyone for the replys ill check out the comet bulbs, didnt realize purple was one of the tough ones i always hear about yellow and orange being a pain

    Quoted from DefaultGen:

    You need a Mongol standup more than you need to fix your purple LEDs!

    target is already taken care of thanks

    #21 3 years ago

    Yellow and Orange.....In Older Games, Grab a Twin 2835 Frosted.
    It will make inserts richer in color, without loosing brightness.

    The issue of yellow and orange applies to 1 SMD 5050, which is in most all kits, so
    the solution is warm white, usually. (White and Pink can be used too)

    Ill take some pics one day of the failed pile of purples.

    To be fair, shipping and lost protos werent likely to be more then 1K...Its the mindless
    hours describing "Purple" to China and Taiwan...and Pinball.
    So the rest is time, and for me thats another story.

    IMO for Purple 1 SMD is standard and a light Purple.
    A slightly different, darker hue, is PBL 3 LED.
    Then Purple Passion.

    UV can be used in some places, but usually only Super Flux Piranha lens to see the color, and its dimmer, but Ive used it too.
    Some people use Purples to look like UV!

    Op-Max is the brightest diffused Purple for GI and Spots.

    #22 3 years ago

    Pinball Centre LED's for me, just wow. Got the purple in my FT and it is something else.

    #23 3 years ago

    Are these purples from comet?

    image_(resized).png

    #24 3 years ago

    Comet's Purple Passion, Sunlight, & Ice Blue are the ish.

    baywatch_(resized).JPG

    #25 3 years ago

    Purple is tough. Once you shine a light through it, it goes pink. I wanted purple for my LOTR fellowship lights. everything looked pink. So I invested in some color purple photography gels, found them on ebay. I tucked them into the spot right under the insert and then put a purple light on them. The best effect you can get when the insert isnt colored purple!

    IMG_0980_(resized).JPG

    #26 3 years ago

    Here's some of the purple passion in my bk2k. They're in some of the inserts and the pop bumpers. Actually in the pop bumpers, i soldered some of the purple ones upside down to the bottom of red comet pop bumper led board so it shines red up and purple down.

    IMG_20160322_215151_(resized).jpg

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