Display screen film, preparation method therefor and energy saving method

A preparation method for a display screen film, comprising:

• growing an orientated carbon nanotube layer on a quartz glass layer;
• absorbing, by the quartz glass layer, incident light, and enabling all the incident light to reach the orientated carbon nanotube layer;
• and
• refracting, by the orientated carbon nanotube layer, all the incident light.

An energy saving method using a display screen film, comprising:

• growing an orientated carbon nanotube layer on a quartz glass layer;
• forming the quartz glass layer having the orientated carbon nanotube layer grown thereon into the display screen film, and attaching the display screen film onto the surface of a display screen;
• absorbing, by the quartz glass layer, incident light from the surface of the display screen and enabling all the incident light to reach the orientated carbon nanotube layer;
• and refracting, by the orientated carbon nanotube layer, all the incident light to enable the light to emit out vertically after passing through the display screen film.