The transformer is originally developed for back-light of
color liquid crystal displays and is optimized for that purpose.
The impedance of the back-light ranges from lOOK to 200K
Ohm. In order to light up the back-light with high luminance,
supply voltage to the back-light is required to be more than
500V. The impedance of the transformer is designed to match
that of the back-light so that the back-light could be lighted up
efficiently.