There are various methods employed to improve LED nonlinearity, such as phase shift modulation method, negative feedback method, Quasifeedforward method and Pre-adding of 2nd harmonic method.
But in this thesis, Pre-distortion method using $\gamma$ - network is used.
DG ＆ DP without compensation network are 5.9 % and 2.3˚, but with compensation network they are 2.3% and 2.1˚, and SNR is 63 dB.
They are within NTSC standards.
Besides, in this thesis harmonic distortions of LED is analyzed.