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Saturday, December 29, 2018

Vintage displays (Part 2)

  Some  earliest LED displays for military ground equipment and industrial applications:
HDSP-2490, ceramic DIP, year 1989, red LED color:


 20x optical zoom


200x

500x

500x, same picture but with different light position, light shines from above through the lens, silicon die part number 1BU9B with HP logo and photo-lithography alignment squares 


500x


500x LED crystal itself, all crystals connected into 5x7 LED matrix, similar to HDSP-2000


with 2000x we can see purple ceramic crystals and gold coating structure


300x


 HDSP-2451, year 1985, yellow LED color:

200x


500x, silicon die part number 1BU8B, ancestor of HDSP-2450 from 1989


500x, tiny wires connected with dot welding

500x


200x and LED crystal
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1 comment:

  1. Lukas_CZMay 4, 2020 at 3:05 AM

    Dear Jason , I am interested in vintage LED displays too. See my pages: https://www.ctvrtky.info/sbirka-displeju-led/.
    I have couple of surplus displays for exchange, if you are interested of course.

    Have a nice day!
    Lukas

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