Questions tagged [ccfl]

25 questions
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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 internally different sizes. Everything I know about…
Thomas O
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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 "universal" CCFL supply that I can use to replace the…
Axeman
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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 Most other inverters seem to have 6 wires but…
Dave
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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 context, low power means that I don't intend to…
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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 pinouts and datasheets for the transformer in…
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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 brightness of each of the lights should be individually…
erikwallen
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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 from for the LEDs? Can I get power maybe from…
Abbafei
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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 when I don't need 100%? It is hard to find new LCD…
Kamil
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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 do that. The problem: LG Flatron W1943C LCD…
GuiRitter
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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 and off independently using an Arduino and ideally…
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OZ960 Intelligent CCFL Inverter Controller Diodes on OVP pin

I can't understand the purpose of the two diodes (at the red box on the picture) and how they work? Between the two capacitors the "1" diode cut off them from the GND because it is in reverse polarity and at this point "A" capacitors I beleive that…
2 X
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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 can see the voltage is about 1700 volts with…
Komental
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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 careful disassembling the display, I found out that…
cream_pi
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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 longer distance, exactly at a distance of 7 and…
Lubomír
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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% of the time and the rest of the time it has spent…
juhist
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