I recently opened up my old portable dvd player. the Li-Po battery went missing several years ago, so by now its dead, and we no longer had use for it.
To my surprise, the top screen panel, housed not only the lcd, but a driver which drives the LCD from composite video. Ive been looking for something like this for a very long time. currently the best i could find was something like a super low quality tiny TFT driven by a chip of similar function with a built in regulator and rca jacks, it cost $70.
Now, i have a big problem, two actually, the first is that, i have no idea what kind of voltages and currents this thing requires/handles, the second, is i have a strong tendancy to break electronics when i experiment with them knowing nothing about them.
so far, ive found that the module seems to be regulators, current limiters, drivers, all operating off one IC, which is a CT675C-LF. So far i havent even been able to get so much as proof that cheertek even exists, let alone a datasheet for this, or any other "thing" cheertek manufactures.
I was wondering if anyone know where i might locate the cheertek datasheets? or more specifically what mine uses, or, would anyone happen to know how i would otherwise work out the voltages and neccesary currents the lcd uses. the pins are configured ignd vgh vee vcc vdd vin vss s-c gnd cvbs/y agnd sda scl, which ones do i need, minimum to operate the driver? i want to play composit video on the lcd. also, what would normal operating conditions be exactly? such as, which, are positive and negative, and what kind of power is typical for them?
My lcd is 7" and uses a small cfl inverter.
please help, any help would be greatly appreciated