Questions tagged [ccfl]

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Is there a way to dim CCFL lamps in a monitor backlight?

I use 30 inch monitor Samsung 305t that uses 16 CCFL lamps as a direct backlight. The driver consists of 8 HV transformers, each of them running 2 lamps in series. Some info about the lamps: As you ...
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50 views

Can short circuiting the CCFL inverter output while plugged to an LCD panel damage it?

The TL; DR version of the question: I had an LCD panel salvaged from a broken laptop. I bought a controller board with onboard inverter and the monitor was working. I accidentally short circuited the ...
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3answers
266 views

Drive a magnetron with low power via a CCFL backlight driver

[EDIT] My real question here is: can a magnetron from a microwave oven be used to output low power microwaves? If so, how can I achieve this? If not, what is a source for low power microwaves? In this ...
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1answer
551 views

What is the typical voltage for driving LCD fluorescent backlight tubes?

I ran into this old cockpit/pilot room for heavy mining machinery in which there was an LCD display that's not lit properly, that is, the image was there but the backlight clearly was gone. Upon ...
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1answer
45 views

Extension for CCFL tubes

I have an inverter for cold cathode lights powered via a molex connector from a PC power supply, with a PCI/PCI-E slot bracket where is placed an ON/OFF switch, and I would need to use one light at a ...
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169 views

High voltage output from CCFL backlight transformer?

I have an old television inverter board I've been meaning to turn into a power supply for a plate-deflected oscilloscope CRT *. I'm not really an expert on transformers, however, and though I have ...
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1answer
997 views

Confusion about ccfl inverter transformer

I have this transformer that came from a ccfl inverter and the pins on it are confusing me a bit. I've tested every pin and only pin 3 and 6 seem to form the primary winding and somehow pin 1 and 8 ...
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1answer
255 views

Do cold cathode fluorescent lights (CCFLs) degrade as a function of idle time?

I have a HP LP2475w display with a cold cathode fluorescent light (CCFL) backlight. It is approximately 8 years old. However, it has only 9041 backlight hours, meaning it has been used for only 12.9% ...
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1answer
642 views

How to connect LCD backlight wires [closed]

I have bad caps in my LCD monitor. While taking it apart, I disconnected the LCD backlight wires to get to the power supply. I blame bad product design and my own stupidity for not checking how the ...
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1answer
1k views

CCFL wire polarity; any considerations?

Are there any considerations for the polarity of wires on a CCFL tube? I am converting a monitor from 120vAC to 12vDC using a generic inverter (AVT4029; also have AVT4168 not pictured) and LCD driver ...
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1answer
1k views

How to power CCFLs from backlight using original inverters (from a disasembled LCD screen)

I've search the net and dealers for specs of these inverters, no chance! I'd like to make somme discreet lightings with the CCFLs, as the screen was disasembled in a hurry, without noting the ...
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1answer
205 views

Negative Voltage Ccfl Inverter from AC Adapter

I have a CXA M10M-L ccfl inverter and I need negative voltage from its output, for anode ground scheme of a photomultiplier tube. I am confused because most discussions of this topic use batteries to ...
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1answer
175 views

cheapo CCFL LCD keeps colour-drifting - what is the cause? [closed]

My display's (Phillips 231E) white point drifts continiously. Once I have created profile for it it will be fine for some time but then it will shift slightly or badly. For example: in some cases I ...
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1answer
177 views

Can a piezoelectric inverter for CCFL work for similar sized neon tubes?

I've done some backlight work for instrument displays using CCFLs and designing custom drivers (12 Vdc to ~1000 Vac) so I have some experience with these designs. Recently a friend of mine was ...
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2answers
706 views

Dimming CCFL:s with PWM or amplified analog voltage

First post here. I have been trying to get this project going for a while, but I now think it is time to ask for help. I want to build an array of cold cathode fluorescent lights (CCFL:s). The ...
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3answers
1k views

Lumen difference between CFL and LED

How much watt I need for LED bulb to get the same amount of light produced by 32 Watt CFL bulb? So, comparing lumen is the right way to find out the difference between these two light source?
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1answer
176 views

Can low brigtness extend life of CCFL lamp in laptop LCD backlight?

I have really good and old laptop (IBM t60p with t61p board). I just replaced whole screen because CCFL lamp died after many years. Can I extend life of CCFL by using laptop with reduced brightness ...
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1answer
163 views

How to make a dimmer for a 11W CFL?

I have a desk lamp, that uses 11W/827 CFLs (current one is an Osram Dulux S) The lamp uses a power supply ("Type BL1"), but it seems the transformer acts more like an AC/AC power converter, as it ...
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0answers
697 views

LCD screen with a dark patch, hot, hissing and whole screen flickering: what is happening exactly?

I've just had a problem with an LCD monitor, but this question is not about solving this problem. Google did that. I want to know what is happening at the electronic and physical level. Google didn't ...
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0answers
147 views

Switching cold cathode fluorescent lights on and off without relay?

I have a few sets of 2-in-1 CCFLs that are designed to be powered off the 12V rail of a computer PSU. I'm planning to build a large 7-seg display using them so I'd like to be able to switch them on ...
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1answer
6k views

LCD backlight CCFL lamps power supply

I have a quantity of LCD panels (from a wide range of dead laptop) and I would like to use only the CCFL + diffusors as a "creative" light source for a room in my house. Is there some sort of "...
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2answers
182 views

Electron Carbonization issue related to inductors and ballasts

I have searched on the internet and I found nothing on this area. Not even a wiki page, and not on several book glossaries. This is related to the CCFL ballasts and inductors that used to control the ...
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2answers
1k views

Why does a CCFL in an LCD have a bigger pink lead and a small white lead?

After removing the dead CCFLs from an LCD monitor, I noticed something odd. Although both wires go to different ends of the tube and presumably carry identical currents, they are visibly and ...
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2answers
441 views

How would I go about replacing a CCFL laptop LCD scrren backlight with LEDs?

Are there certain kinds of LED(s) that should be used? Is there a certain way the LED(s) should be put? If yes to any of these questions, why? Also, where is a good place from the laptop to get power ...
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0answers
153 views

Inputs on Samsung CCFL Inverter

I am trying to use the backlight from a Samsung laptop for a light box but have NO idea what the input connections are. I've found some Datasheets for other models but not the right one. LTN141XB-L01 ...