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| ExTreme noob question (lcd 320x240) http://forum.lcdinfo.com/viewtopic.php?f=6&t=1193 |
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| Author: | Neo4 [ Sat May 07, 2005 22:50 ] |
| Post subject: | ExTreme noob question (lcd 320x240) |
hy i have an 320x240 lcd with sed1335 but i haven't found an scheme for it, with the righ order and same names (like Vo, Vee for ex)ths lcd needs an inverter whitch voltage? the lcd infos are where. help me with the scheme please http://www.bolymin.com.tw/data/P084-BG320240F.pdf |
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| Author: | coorz [ Sat May 07, 2005 23:04 ] |
| Post subject: | |
I use this one: http://liquid-mp3.schijf.org/schematics ... wiring.gif Your CCFL's specs are in that PDF sheet, if you can't find thst specific inverter you can use a 'modding' CCFL inverter. Also the DC-converter for negative voltage is optional, if it's not on your LCD you'll need to built one. |
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| Author: | Neo4 [ Sat May 07, 2005 23:19 ] |
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i need an inverter to have backlight and for have white pixels what are the spces of them?a guy told me that to have the inverter to the white i can have the -12v if its only -12v on the psu, on the cable that links to the mbo. but i want the specs too. i dont undersant much of this :/ that scheme have -25v for what?? and have names like select 1 and 2 that my lcd dont...i dont understand much of this i need a think for dummys... |
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| Author: | mingingbollock [ Mon May 09, 2005 14:52 ] |
| Post subject: | |
Just use a cathode inverter from a pc cathode light kit , that will do the trick , polarity dont matter . |
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| Author: | Neo4 [ Mon May 30, 2005 20:36 ] |
| Post subject: | |
i have tried and its works with the cc inverter but a friend told me that it could work for a short period of time if the voltages aren't the same do you have certain that the voltage of the cc is the right for my lcd backlight? other question: if dont use the DC-converter to have the withe pixels they will be black right? thanks a lot [] |
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| Author: | Henri [ Thu Jun 02, 2005 10:51 ] |
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It's not that much about the voltage but it's the current. Many inverters from the pc lightning kits seem to output a bit too much current for lcd ccfl tubes. If the display doesn't have internal DC-DC converter and has input for external negative voltage you wont get anything on the screen without the negative voltage present. |
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| Author: | Neo4 [ Thu Jun 02, 2005 18:06 ] |
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Henri wrote: It's not that much about the voltage but it's the current. Many inverters from the pc lightning kits seem to output a bit too much current for lcd ccfl tubes.
If the display doesn't have internal DC-DC converter and has input for external negative voltage you wont get anything on the screen without the negative voltage present. a guy that have a few lcds told me if i dont put the dc-dc converter intead of withe pixels I will have balck pixels... and i can get the -12v from the psu on the cable that links to the mbo |
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