my lenovo k3 note's screen fades away

[AC Question]

my lenovo k3 note's screen is alright when i start using it , but within a minute my screen fades away, if i keep my phone's display off for sometime, the screen gets its original colours , but again it fades away
i dont undestand the problem
please help

 

[belodion]

That may need repairer attention.
If the device is warrantied, contact the manufacturer's customer support.