TFT CCFT Display Backlight Inverter

ccft backlight & inverter

I got Sharp LQ057Q3DC02 5.7" Color TFT LCD module and I need a backlight inverter for it. Is it to hard to make it from strach?

Lamp voltage 620..760 Vrms Il=5mA
Lamp current Il = 4.5..5.5 mArms
Power Consumption 3.5W


Do you know any ccft inverter IC and schematic?
Regards

oz960 inverter problem

u can use OZ960 or BIT3105 to make a inverter module for ur LCD module.it's not very easy, but u can buy a commercial inverter to ignite ur CCFL

bit3105 6 lamp application

U can find 'em in these company : O2 Micro, Unitrode(TI), MONOLITHIC POWER SYSTEMS, Maxim, Linear tech, Micro Linear......etc

I had used Unitrode CCFL driver long time ago, easy to use....

backlight inverter overheat

finally I bought a blue neon tube from a computer store. it includes a two channel boxed and cabled inverter which is perfectly matches with my requirements.
it's working with my tft great and it's only $9... Should I connect my neon tube to second channel of my inverter? ))

ccft kit

Hi,

I'm currently playing around with assorted cheap LCD panels from eBay, trying to get them talking to some SBC's. Just got a 9.5" Colour DSTN working this morning - now I know why TFT was invented!

A couple of things about the CCFL inverters:

1. I have read that the tubes work better and live longer if they are driven with a sine wave, not a square wave.

2. Many of the cheaper "PC modding light inverters" are a poorly regulated nasty-square wave output (I know, I have a few)

3. The best inverters are those designed for notebook PC's - often available very cheaply from surplus outlets or ebay, or from a dead notebook. I have a few that cost about $5. You might need to figure out the connections though - I do this with a datasheet from the controller chip and a continuity tester on the connector. Some are tricky and require a PWM brighness signal, some just need power.

4. If the inverter is truly multi channel, not just two wires from one transformer, then it can overheat an unused channel. I learned this with a four-output one, just using two channels, when the other two transformers started giving off that nice hot varnish smell.

5. Most notebook inverters will have an 'enable' line, this can be connected to turn it off if the PC goes to sleep or whatever, so you don't waste the tube.

6. Try to get an inverter from something with a similar screen size if possible - it will (might be) a closer match to your tube size.

Hope some of this is helpful. I'm awaiting delivery of a 10.4" TFT unit ($40) to play with.

Cheers,
FoxyRick.

I nearly forgot: Whatever inverter you use, remember not to touch the output. It stings and leaves nice little burn spots. How do I know this? Guess! The main danger is jumping so much that the nice, shiny kit gets knocked onto the floor