Get a laptop power brick, build a couple of regulator circuits (12V and 5V), also a transistor switch circuit, and possibly a dimming circuit for true integration.
Use 3528 SMD birght white LEDs [120LEDs per metre] in place of the ccfls!
First problem, how much current will I need?
This needed breaking down into areas of power consumption:
1. The tft panel itself
2. The driver board
3. The backlight
Scouring the internet for panel information lead me to a fab website called www.Panelook.com
#Top Tip# Rather than going to Panelook and using their search bar I suggest going to Google and typing your panel number followed by 'Panelook' and 'Overview'. For some reason their search bar didn't find my model number but Google did!
Under the section 'Signal Interface' they show the input voltage/current/power consumed by the panel. Nice!
1. 5V at 0.74A max - Doing the maths that's 3.7W of power (although it's actually shown on the overview
Now to work out the power consumption of the driver board is going to require a little bit of investigative work and deductive reasoning (as well as some overestimating!).
In the same overview gathered from Panelook it shows under the 'Backlight System' field that the ccfls run at 640V (740V max) with a max current of 7.5mA. The values shown are per ccfl, I have 4 of them on this monitor so that's a total of 30mA current and *22.2W power. *Note: this is based on maximums, most of the time the backlight will operate at about 18W.
So far then we have a total power consumption of about 18W+4W=22W. The monitor is rated at 30W so we have 8W remaining as a huge over-estimate. The driverboard uses 12V of potential so 8/12 = 0.67A max.
2. Driverboard requires no more than 0.67A (670mA)
3. The diy LED backlight modification - This one's easy!
A reel of 3528 SMD LEDs comes as 600 per 5m, or 120 per m x 5. The total current draw of all 600 is given as 4A.
Right, how many do I need?
5m or 5000mm/600LEDs=8.33mm between LEDs
My ccfls are 306mm wide:
Let's call this 36LEDs since they are divided into banks of 3 and that gives 12 banks exactly. Not to mention that I wont be using all of the 17" screen so coverage to the corners isn't essential.
I need a row of lights at the top and the bottom, so that's 72LEDs in total.
600LEDs (including the resistors) consume 4A of current so we should calculate the current draw per bank to also include the single resistor which is in series with each bank:
600LEDs/(3LEDs per bank)=200banks
4Amps/200banks=0.02A (20mA per bank)
There's 72 of them so that's 24banks of 3:
24banks x 20mA=480mA (total current consumption)
So the grand total current consumption for the 5V line is 740mA + 20% =~1A
And, 480mA + 670mA = 1150mA + 20% =~1.5A for the 12V line.
Therefore a power supply that provides 12V 4A will be perfect to allow for any further mods that might crop up along the way. Now to build the rectifiers.
**Note: This is all a bit fuzzy. Some assumptions have been made in the calculations. This is not intended to give exact figures, just an educated guess at current requirements.**