LED bulb Disection

Discussion in 'General Electronics Chat' started by Nathan Hale, Jan 10, 2016.

  1. Nathan Hale

    Thread Starter Active Member

    Oct 28, 2011
    125
    2
    Hello folks, Hope all is well with everyone.
    I bought an LED bulb this past summer. The bulb burned out last week and i opened it up , curious to know how an LED bulb looked like inside. Could you guys please let me know what those tiny yellow rectangles area?
    The ones lying down flat have markings beside them that say "D1, D2,D3 ..."
    The ones vertical have markings that say DV1,DV2.....etc..

    thank you for your replies.

    0110161854.jpg
     
  2. blocco a spirale

    AAC Fanatic!

    Jun 18, 2008
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    Surprisingly, those yellow rectangles are LEDs; did you expect to find something else in an LED bulb?
     
  3. dl324

    Distinguished Member

    Mar 30, 2015
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    Yup, they're LEDs. Most LED bulbs have at least a one year warranty; some of mine are 5 years.
     
  4. Roderick Young

    Member

    Feb 22, 2015
    408
    168
    D stands for Diode, so those are LEDs, of course. The yellowish tint is to counteract the natural bluish tinge of the LED to make a warmer light. My guess is that the DV stands for a Vertically mounted LED. Notice how everything is set up to carry heat away from the LED. If you were to look deeper into the base of the bulb, the electronics to supply the proper current to the LEDs should be in there.

    I'm curious - what brand of bulb was it, if you remember? We have yet to burn out a single LED bulb after about 2 years of use. I'm starting to see bargain LED bulbs now - pack of 6, 60W equivalent FEIT LED bulbs for $12 at Home Depot. But I wonder if the newer ones are poorly made. The original compact fluorescent bulbs lasted forever. We still have one from 1990 that has been in continuous use. Once CFL bulbs became mainstream and cheap, they started burning out after just a year or two.
     
  5. Roderick Young

    Member

    Feb 22, 2015
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    I see 3 of the vertical LEDs missing in the picture. Could it be just one or more fell off? Maybe you could fix the bulb if you soldered the loose ones back on?
     
  6. Nathan Hale

    Thread Starter Active Member

    Oct 28, 2011
    125
    2
    it was this led bulb....

    http://www.feit.com/led-lamps/performance/performance_led/performance_led/a19/bpom60-830-led
     
  7. Nathan Hale

    Thread Starter Active Member

    Oct 28, 2011
    125
    2
    yes u r correct. some of the leds came off while disassembling the bulb. and the electronics inside the bulb! oh boy! it almost looks like a small micro controller or something!
     
  8. RichardO

    Well-Known Member

    May 4, 2013
    1,235
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    This LED lamp is dimmable so the control has to be complex. :(
     
  9. hp1729

    Well-Known Member

    Nov 23, 2015
    1,954
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    How did it fail? All lights out or just a few? All lights out sounds like a controller problem. The LEDs didn't fail. The driver did.
     
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