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Inside a VU1 ESL lamp

Inside a VU1 ESL lamp

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I had one of these fail after a short time and kept it. A few days ago, I decided to crack it open to see what I'd find--this is the result.

I have one or two more of these, still in the box, for collection purposes. I traded another to John, and I may have traded one more to someone else. I don't remember now.

2018-01-21 17_19_57.jpg 2018-01-21 17_20_57.jpg 2018-01-05 20_08_05.jpg 2017-11-17 14_06_37.jpg

Light Information

Light Information

Manufacturer:Vu1 Corporation
Lamp
Lamp Type:Electron-stimulated luminescence
Base:E26
Electrical
Wattage:19.5 W
Voltage:120 V
Physical/Production
Factory Location:China

File information

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Filename:2018-01-05 20_08_05.jpg
Album name:nicksfans / Fluorescent
Keywords:Lamps
File Size:572 KB
Date added:Jan 07, 2018
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Date Time:2018:01:05 20:08:05
DateTime Original:2018:01:05 20:08:05
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rjluna2
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Robert


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Jan 07, 2018 at 05:29 PM Author: rjluna2
Well, at least it is a TV tube

Pretty, please no more Chinese failure.

Lightingguy1994
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Jan 07, 2018 at 06:09 PM Author: Lightingguy1994
You know I bet it is actually possible to make this show an image on its screen, someone with advance knowhow could prob do it
rjluna2
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Robert


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Jan 08, 2018 at 12:41 PM Author: rjluna2
You need deflecting and focusing coils to guide the electron where it hits

Pretty, please no more Chinese failure.

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Jan 08, 2018 at 02:39 PM Author: Lightingguy1994
Yes thats what I mean, someone with advanced electronics skills could rig up some coils, that would be so cool especially because you just never see any black and white CRT tubes with soft white phosphors
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Jan 21, 2019 at 07:17 AM Author: Fluorescent05
Where did you buy these?

Don't be fooLED, T8 IS the worst thing to do to a magnetic T12 fixture.

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Jan 21, 2019 at 07:57 AM Author: dor123
In a CRT, the electrons are emitted by a cathode, which is a tungsten filament (The reason why CRT takes several seconds to warm up and the image to appear). If this lamp also uses a cathode for electron emission like a CRT, I don't expects so much high efficiency (Except for the lower driver losses, because it is electronic, and not a magnetic transformer like in a CRT).

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

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Jan 21, 2019 at 09:43 AM Author: Medved

Yes thats what I mean, someone with advanced electronics skills could rig up some coils, that would be so cool especially because you just never see any black and white CRT tubes with soft white phosphors


No electronic can help here. First you would need the electrons to be emitted from a very small source, in order to allow you any focusing at all. The thing is, all the "electron optics" in the CRT electron gun is really doing nothing else than a set of lenses do on a projector: They are projecting the small cathode surface onto the screen in order to make the illuminated point. But such small size cathode allows only limited electron current (even with all the tricks like a pointy hole in the control electrode), so to get some useful power (so brightness) you have to use high voltage (BW's used 10..18kV, color CRTs up to 30kV, due to extra mask losses)
Here the aim was not to create a picture, but to just emit plain light with as high efficiency as possible. High efficiency means do not accelerate the electrons more than required, so use limited voltage. To reach the power needed, the current has to be boosted compare to a picture CRT. But larger current needs larger cathode, without anz restriction in the electron flow.
That means two things are missing inside of the tube itself in order to work as a picture tube:
There is no "electron optic" electron lens assembly, so no way to project the cathode to form any space controlled beam.
And second even if there would be the lens (to some extend you may form some lens with just a magnetic field, so no need for any structure within the tube for this), the large electron source could be projected only as a large image on the phosphor. That is just a plain optics geometry at work here. The same as an attempt to focus a large diffused lamp into a narrow beam (we are talking about few angular minutes to form a reasonable picture) with a small lens or reflector, it is just not possible (the beam angle is just a ratio between source size and lens/mirror distance from the source; here we need few angular minutes, so the ratio has to be in many 1000's).
So no way to get any focusing. And without the ability to form a small focused dot, you may deflect the beam in whatever way (that part is possible, just add the deflection electromagnets).

No more selfballasted c***

nicksfans
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Down with lamp bans!


GoL the.baus.of.all.bauses UCDl2EWWZc9h1IZXcfGU9OZA nicksfans
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Jan 21, 2019 at 11:16 PM Author: nicksfans
@Fluorescent05: I got them here.

I like my lamps thick, my ballasts heavy, and my fixtures tough.

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Jan 22, 2019 at 08:22 PM Author: Fluorescent05

@Fluorescent05: I got them here.

Thank you!

Don't be fooLED, T8 IS the worst thing to do to a magnetic T12 fixture.

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