Indeed the exact same LCD software will work on a TV, phone, laptop, tablet, monitor if implemented. Independent of the HW used for the backlight. The earlier Nokia N9210 communicator used CCFL tubes and the N9210i used some sort of LED backlighting.
One of my HDTVs is CCFL tubes and a later model (with inferior selection of inputs) has LED backlights. Cheaper TVs/Monitors/Laptop only use LEDs on the edges. Some netbooks used too few and only on the top edge, so you see a row of cone shaped furrows if the screen is mostly white. Makes poorly Forma front lights look good!
Only some very very expensive TVs have arrays of R G B LED backlights for the LCD to increase contrast and saturation on large areas. It's an unnatural effect best turned off!
*Regular fluorescent tubes and folded / curled CFL have a heating coil at each end momentarily powered till the tube is warm to aid electron emission. Sodium lighting has neon to get the sodium vaporised while the tube warms, hence orange to pink glow when started. CCFL are Cold Cathode discharge tubes and use a much higher voltage:
https://en.wikipedia.org/wiki/Fluore...orescent_lamps
The cost, fragility and need for a high voltage supply means CCFL were replaced by LEDs. They do last well, I've one laptop 20 years old still good. The colour rendition is easier to be good than LEDs. Cheap "White" LEDs are a bit purple and get worse as the phosphor ages. Better ones use more expensive phosphors and near UV LEDs.