Light guide membrane and backlight module for key backlight

The invention discloses a light guide membrane and a backlight module for key backlight. The light guide membrane comprises a transparent light guide membrane layer on which light guide nodes are distributed, and the light guide membrane is characterized in that one to two light guide holes are arranged on the light guide membrane. The backlight module is formed by adopting the light guide membrane to match with a top luminous LED; and the center position of each light guide hole is consistent with that of the corresponding top luminous LED. The invention can adopt one or two top luminous LEDs to match with the light guide membrane to achieve the backlight component through the light guide holes arranged on the light guide membrane, coincides with the requirements of key backlight uniformity of electronic products such as mobile phones, provides a low cost scheme of key backlight for small-sized and middle-sized electronic products such as the mobile phones, and can also realize the ultra thinness and low energy consumption of the products.