In recent years, liquid crystal display with less power of the display consumed is very important problem. In this paper, it is denoted that the front light system for emitting the daily light with the ultra-low power consumption type is developed. It is a purpose of this paper to apply to the front light by cutting of the minute groove (optical grating), and scratching on the ITO film. In the experimental method, ultra precise cutting machine called "RULING ENGINE" is used. Micro-groove of high-density marked line is cut on aluminum thin film (evaporated), copper film (plated) and ITO film (sputtered) which are prepared on the glass substrates. Diamond cutter with the profile specially shaped in the cross section is prepared. The cross section of the diamond cutter shape is accurately transferred to the micro-groove. Marked line is succeeded in the groove of 0.4 mum pitch (2500 lines per mm) in the minimum, and of 0.2 mm pitch (5 lines per mm) in the maximum in pitch length. Using Michelson interferometer and feedback control system, the accuracy of the feed step completed 0.078 mum in pitch length. It is shown that characteristics of reflective light distribution by the groove are flat under adaptive condition in front light.